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linux-zen-desktop/drivers/gpu/drm/i915/display/i9xx_wm.c

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// SPDX-License-Identifier: MIT
/*
* Copyright © 2023 Intel Corporation
*/
#include "i915_drv.h"
#include "i915_reg.h"
#include "i9xx_wm.h"
#include "intel_atomic.h"
#include "intel_display.h"
#include "intel_display_trace.h"
#include "intel_mchbar_regs.h"
#include "intel_wm.h"
#include "skl_watermark.h"
#include "vlv_sideband.h"
/* used in computing the new watermarks state */
struct intel_wm_config {
unsigned int num_pipes_active;
bool sprites_enabled;
bool sprites_scaled;
};
struct cxsr_latency {
bool is_desktop : 1;
bool is_ddr3 : 1;
u16 fsb_freq;
u16 mem_freq;
u16 display_sr;
u16 display_hpll_disable;
u16 cursor_sr;
u16 cursor_hpll_disable;
};
static const struct cxsr_latency cxsr_latency_table[] = {
{1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
{1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
{1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
{1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
{1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
{1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
{1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
{1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
{1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
{1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
{1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
{1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
{1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
{1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
{1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
{0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
{0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
{0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
{0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
{0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
{0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
{0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
{0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
{0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
{0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
{0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
{0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
{0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
{0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
{0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
};
static const struct cxsr_latency *intel_get_cxsr_latency(bool is_desktop,
bool is_ddr3,
int fsb,
int mem)
{
const struct cxsr_latency *latency;
int i;
if (fsb == 0 || mem == 0)
return NULL;
for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
latency = &cxsr_latency_table[i];
if (is_desktop == latency->is_desktop &&
is_ddr3 == latency->is_ddr3 &&
fsb == latency->fsb_freq && mem == latency->mem_freq)
return latency;
}
DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
return NULL;
}
static void chv_set_memory_dvfs(struct drm_i915_private *dev_priv, bool enable)
{
u32 val;
vlv_punit_get(dev_priv);
val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2);
if (enable)
val &= ~FORCE_DDR_HIGH_FREQ;
else
val |= FORCE_DDR_HIGH_FREQ;
val &= ~FORCE_DDR_LOW_FREQ;
val |= FORCE_DDR_FREQ_REQ_ACK;
vlv_punit_write(dev_priv, PUNIT_REG_DDR_SETUP2, val);
if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2) &
FORCE_DDR_FREQ_REQ_ACK) == 0, 3))
drm_err(&dev_priv->drm,
"timed out waiting for Punit DDR DVFS request\n");
vlv_punit_put(dev_priv);
}
static void chv_set_memory_pm5(struct drm_i915_private *dev_priv, bool enable)
{
u32 val;
vlv_punit_get(dev_priv);
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM);
if (enable)
val |= DSP_MAXFIFO_PM5_ENABLE;
else
val &= ~DSP_MAXFIFO_PM5_ENABLE;
vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, val);
vlv_punit_put(dev_priv);
}
#define FW_WM(value, plane) \
(((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK)
static bool _intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable)
{
bool was_enabled;
u32 val;
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
was_enabled = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF_VLV) & FW_CSPWRDWNEN;
intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF_VLV, enable ? FW_CSPWRDWNEN : 0);
intel_uncore_posting_read(&dev_priv->uncore, FW_BLC_SELF_VLV);
} else if (IS_G4X(dev_priv) || IS_I965GM(dev_priv)) {
was_enabled = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF) & FW_BLC_SELF_EN;
intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF, enable ? FW_BLC_SELF_EN : 0);
intel_uncore_posting_read(&dev_priv->uncore, FW_BLC_SELF);
} else if (IS_PINEVIEW(dev_priv)) {
val = intel_uncore_read(&dev_priv->uncore, DSPFW3);
was_enabled = val & PINEVIEW_SELF_REFRESH_EN;
if (enable)
val |= PINEVIEW_SELF_REFRESH_EN;
else
val &= ~PINEVIEW_SELF_REFRESH_EN;
intel_uncore_write(&dev_priv->uncore, DSPFW3, val);
intel_uncore_posting_read(&dev_priv->uncore, DSPFW3);
} else if (IS_I945G(dev_priv) || IS_I945GM(dev_priv)) {
was_enabled = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF) & FW_BLC_SELF_EN;
val = enable ? _MASKED_BIT_ENABLE(FW_BLC_SELF_EN) :
_MASKED_BIT_DISABLE(FW_BLC_SELF_EN);
intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF, val);
intel_uncore_posting_read(&dev_priv->uncore, FW_BLC_SELF);
} else if (IS_I915GM(dev_priv)) {
/*
* FIXME can't find a bit like this for 915G, and
* yet it does have the related watermark in
* FW_BLC_SELF. What's going on?
*/
was_enabled = intel_uncore_read(&dev_priv->uncore, INSTPM) & INSTPM_SELF_EN;
val = enable ? _MASKED_BIT_ENABLE(INSTPM_SELF_EN) :
_MASKED_BIT_DISABLE(INSTPM_SELF_EN);
intel_uncore_write(&dev_priv->uncore, INSTPM, val);
intel_uncore_posting_read(&dev_priv->uncore, INSTPM);
} else {
return false;
}
trace_intel_memory_cxsr(dev_priv, was_enabled, enable);
drm_dbg_kms(&dev_priv->drm, "memory self-refresh is %s (was %s)\n",
str_enabled_disabled(enable),
str_enabled_disabled(was_enabled));
return was_enabled;
}
/**
* intel_set_memory_cxsr - Configure CxSR state
* @dev_priv: i915 device
* @enable: Allow vs. disallow CxSR
*
* Allow or disallow the system to enter a special CxSR
* (C-state self refresh) state. What typically happens in CxSR mode
* is that several display FIFOs may get combined into a single larger
* FIFO for a particular plane (so called max FIFO mode) to allow the
* system to defer memory fetches longer, and the memory will enter
* self refresh.
*
* Note that enabling CxSR does not guarantee that the system enter
* this special mode, nor does it guarantee that the system stays
* in that mode once entered. So this just allows/disallows the system
* to autonomously utilize the CxSR mode. Other factors such as core
* C-states will affect when/if the system actually enters/exits the
* CxSR mode.
*
* Note that on VLV/CHV this actually only controls the max FIFO mode,
* and the system is free to enter/exit memory self refresh at any time
* even when the use of CxSR has been disallowed.
*
* While the system is actually in the CxSR/max FIFO mode, some plane
* control registers will not get latched on vblank. Thus in order to
* guarantee the system will respond to changes in the plane registers
* we must always disallow CxSR prior to making changes to those registers.
* Unfortunately the system will re-evaluate the CxSR conditions at
* frame start which happens after vblank start (which is when the plane
* registers would get latched), so we can't proceed with the plane update
* during the same frame where we disallowed CxSR.
*
* Certain platforms also have a deeper HPLL SR mode. Fortunately the
* HPLL SR mode depends on CxSR itself, so we don't have to hand hold
* the hardware w.r.t. HPLL SR when writing to plane registers.
* Disallowing just CxSR is sufficient.
*/
bool intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable)
{
bool ret;
mutex_lock(&dev_priv->display.wm.wm_mutex);
ret = _intel_set_memory_cxsr(dev_priv, enable);
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
dev_priv->display.wm.vlv.cxsr = enable;
else if (IS_G4X(dev_priv))
dev_priv->display.wm.g4x.cxsr = enable;
mutex_unlock(&dev_priv->display.wm.wm_mutex);
return ret;
}
/*
* Latency for FIFO fetches is dependent on several factors:
* - memory configuration (speed, channels)
* - chipset
* - current MCH state
* It can be fairly high in some situations, so here we assume a fairly
* pessimal value. It's a tradeoff between extra memory fetches (if we
* set this value too high, the FIFO will fetch frequently to stay full)
* and power consumption (set it too low to save power and we might see
* FIFO underruns and display "flicker").
*
* A value of 5us seems to be a good balance; safe for very low end
* platforms but not overly aggressive on lower latency configs.
*/
static const int pessimal_latency_ns = 5000;
#define VLV_FIFO_START(dsparb, dsparb2, lo_shift, hi_shift) \
((((dsparb) >> (lo_shift)) & 0xff) | ((((dsparb2) >> (hi_shift)) & 0x1) << 8))
static void vlv_get_fifo_size(struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state;
enum pipe pipe = crtc->pipe;
int sprite0_start, sprite1_start;
u32 dsparb, dsparb2, dsparb3;
switch (pipe) {
case PIPE_A:
dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB);
dsparb2 = intel_uncore_read(&dev_priv->uncore, DSPARB2);
sprite0_start = VLV_FIFO_START(dsparb, dsparb2, 0, 0);
sprite1_start = VLV_FIFO_START(dsparb, dsparb2, 8, 4);
break;
case PIPE_B:
dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB);
dsparb2 = intel_uncore_read(&dev_priv->uncore, DSPARB2);
sprite0_start = VLV_FIFO_START(dsparb, dsparb2, 16, 8);
sprite1_start = VLV_FIFO_START(dsparb, dsparb2, 24, 12);
break;
case PIPE_C:
dsparb2 = intel_uncore_read(&dev_priv->uncore, DSPARB2);
dsparb3 = intel_uncore_read(&dev_priv->uncore, DSPARB3);
sprite0_start = VLV_FIFO_START(dsparb3, dsparb2, 0, 16);
sprite1_start = VLV_FIFO_START(dsparb3, dsparb2, 8, 20);
break;
default:
MISSING_CASE(pipe);
return;
}
fifo_state->plane[PLANE_PRIMARY] = sprite0_start;
fifo_state->plane[PLANE_SPRITE0] = sprite1_start - sprite0_start;
fifo_state->plane[PLANE_SPRITE1] = 511 - sprite1_start;
fifo_state->plane[PLANE_CURSOR] = 63;
}
static int i9xx_get_fifo_size(struct drm_i915_private *dev_priv,
enum i9xx_plane_id i9xx_plane)
{
u32 dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB);
int size;
size = dsparb & 0x7f;
if (i9xx_plane == PLANE_B)
size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
drm_dbg_kms(&dev_priv->drm, "FIFO size - (0x%08x) %c: %d\n",
dsparb, plane_name(i9xx_plane), size);
return size;
}
static int i830_get_fifo_size(struct drm_i915_private *dev_priv,
enum i9xx_plane_id i9xx_plane)
{
u32 dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB);
int size;
size = dsparb & 0x1ff;
if (i9xx_plane == PLANE_B)
size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
size >>= 1; /* Convert to cachelines */
drm_dbg_kms(&dev_priv->drm, "FIFO size - (0x%08x) %c: %d\n",
dsparb, plane_name(i9xx_plane), size);
return size;
}
static int i845_get_fifo_size(struct drm_i915_private *dev_priv,
enum i9xx_plane_id i9xx_plane)
{
u32 dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB);
int size;
size = dsparb & 0x7f;
size >>= 2; /* Convert to cachelines */
drm_dbg_kms(&dev_priv->drm, "FIFO size - (0x%08x) %c: %d\n",
dsparb, plane_name(i9xx_plane), size);
return size;
}
/* Pineview has different values for various configs */
static const struct intel_watermark_params pnv_display_wm = {
.fifo_size = PINEVIEW_DISPLAY_FIFO,
.max_wm = PINEVIEW_MAX_WM,
.default_wm = PINEVIEW_DFT_WM,
.guard_size = PINEVIEW_GUARD_WM,
.cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params pnv_display_hplloff_wm = {
.fifo_size = PINEVIEW_DISPLAY_FIFO,
.max_wm = PINEVIEW_MAX_WM,
.default_wm = PINEVIEW_DFT_HPLLOFF_WM,
.guard_size = PINEVIEW_GUARD_WM,
.cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params pnv_cursor_wm = {
.fifo_size = PINEVIEW_CURSOR_FIFO,
.max_wm = PINEVIEW_CURSOR_MAX_WM,
.default_wm = PINEVIEW_CURSOR_DFT_WM,
.guard_size = PINEVIEW_CURSOR_GUARD_WM,
.cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params pnv_cursor_hplloff_wm = {
.fifo_size = PINEVIEW_CURSOR_FIFO,
.max_wm = PINEVIEW_CURSOR_MAX_WM,
.default_wm = PINEVIEW_CURSOR_DFT_WM,
.guard_size = PINEVIEW_CURSOR_GUARD_WM,
.cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params i965_cursor_wm_info = {
.fifo_size = I965_CURSOR_FIFO,
.max_wm = I965_CURSOR_MAX_WM,
.default_wm = I965_CURSOR_DFT_WM,
.guard_size = 2,
.cacheline_size = I915_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params i945_wm_info = {
.fifo_size = I945_FIFO_SIZE,
.max_wm = I915_MAX_WM,
.default_wm = 1,
.guard_size = 2,
.cacheline_size = I915_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params i915_wm_info = {
.fifo_size = I915_FIFO_SIZE,
.max_wm = I915_MAX_WM,
.default_wm = 1,
.guard_size = 2,
.cacheline_size = I915_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params i830_a_wm_info = {
.fifo_size = I855GM_FIFO_SIZE,
.max_wm = I915_MAX_WM,
.default_wm = 1,
.guard_size = 2,
.cacheline_size = I830_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params i830_bc_wm_info = {
.fifo_size = I855GM_FIFO_SIZE,
.max_wm = I915_MAX_WM / 2,
.default_wm = 1,
.guard_size = 2,
.cacheline_size = I830_FIFO_LINE_SIZE,
};
static const struct intel_watermark_params i845_wm_info = {
.fifo_size = I830_FIFO_SIZE,
.max_wm = I915_MAX_WM,
.default_wm = 1,
.guard_size = 2,
.cacheline_size = I830_FIFO_LINE_SIZE,
};
/**
* intel_wm_method1 - Method 1 / "small buffer" watermark formula
* @pixel_rate: Pipe pixel rate in kHz
* @cpp: Plane bytes per pixel
* @latency: Memory wakeup latency in 0.1us units
*
* Compute the watermark using the method 1 or "small buffer"
* formula. The caller may additonally add extra cachelines
* to account for TLB misses and clock crossings.
*
* This method is concerned with the short term drain rate
* of the FIFO, ie. it does not account for blanking periods
* which would effectively reduce the average drain rate across
* a longer period. The name "small" refers to the fact the
* FIFO is relatively small compared to the amount of data
* fetched.
*
* The FIFO level vs. time graph might look something like:
*
* |\ |\
* | \ | \
* __---__---__ (- plane active, _ blanking)
* -> time
*
* or perhaps like this:
*
* |\|\ |\|\
* __----__----__ (- plane active, _ blanking)
* -> time
*
* Returns:
* The watermark in bytes
*/
static unsigned int intel_wm_method1(unsigned int pixel_rate,
unsigned int cpp,
unsigned int latency)
{
u64 ret;
ret = mul_u32_u32(pixel_rate, cpp * latency);
ret = DIV_ROUND_UP_ULL(ret, 10000);
return ret;
}
/**
* intel_wm_method2 - Method 2 / "large buffer" watermark formula
* @pixel_rate: Pipe pixel rate in kHz
* @htotal: Pipe horizontal total
* @width: Plane width in pixels
* @cpp: Plane bytes per pixel
* @latency: Memory wakeup latency in 0.1us units
*
* Compute the watermark using the method 2 or "large buffer"
* formula. The caller may additonally add extra cachelines
* to account for TLB misses and clock crossings.
*
* This method is concerned with the long term drain rate
* of the FIFO, ie. it does account for blanking periods
* which effectively reduce the average drain rate across
* a longer period. The name "large" refers to the fact the
* FIFO is relatively large compared to the amount of data
* fetched.
*
* The FIFO level vs. time graph might look something like:
*
* |\___ |\___
* | \___ | \___
* | \ | \
* __ --__--__--__--__--__--__ (- plane active, _ blanking)
* -> time
*
* Returns:
* The watermark in bytes
*/
static unsigned int intel_wm_method2(unsigned int pixel_rate,
unsigned int htotal,
unsigned int width,
unsigned int cpp,
unsigned int latency)
{
unsigned int ret;
/*
* FIXME remove once all users are computing
* watermarks in the correct place.
*/
if (WARN_ON_ONCE(htotal == 0))
htotal = 1;
ret = (latency * pixel_rate) / (htotal * 10000);
ret = (ret + 1) * width * cpp;
return ret;
}
/**
* intel_calculate_wm - calculate watermark level
* @pixel_rate: pixel clock
* @wm: chip FIFO params
* @fifo_size: size of the FIFO buffer
* @cpp: bytes per pixel
* @latency_ns: memory latency for the platform
*
* Calculate the watermark level (the level at which the display plane will
* start fetching from memory again). Each chip has a different display
* FIFO size and allocation, so the caller needs to figure that out and pass
* in the correct intel_watermark_params structure.
*
* As the pixel clock runs, the FIFO will be drained at a rate that depends
* on the pixel size. When it reaches the watermark level, it'll start
* fetching FIFO line sized based chunks from memory until the FIFO fills
* past the watermark point. If the FIFO drains completely, a FIFO underrun
* will occur, and a display engine hang could result.
*/
static unsigned int intel_calculate_wm(int pixel_rate,
const struct intel_watermark_params *wm,
int fifo_size, int cpp,
unsigned int latency_ns)
{
int entries, wm_size;
/*
* Note: we need to make sure we don't overflow for various clock &
* latency values.
* clocks go from a few thousand to several hundred thousand.
* latency is usually a few thousand
*/
entries = intel_wm_method1(pixel_rate, cpp,
latency_ns / 100);
entries = DIV_ROUND_UP(entries, wm->cacheline_size) +
wm->guard_size;
DRM_DEBUG_KMS("FIFO entries required for mode: %d\n", entries);
wm_size = fifo_size - entries;
DRM_DEBUG_KMS("FIFO watermark level: %d\n", wm_size);
/* Don't promote wm_size to unsigned... */
if (wm_size > wm->max_wm)
wm_size = wm->max_wm;
if (wm_size <= 0)
wm_size = wm->default_wm;
/*
* Bspec seems to indicate that the value shouldn't be lower than
* 'burst size + 1'. Certainly 830 is quite unhappy with low values.
* Lets go for 8 which is the burst size since certain platforms
* already use a hardcoded 8 (which is what the spec says should be
* done).
*/
if (wm_size <= 8)
wm_size = 8;
return wm_size;
}
static bool is_disabling(int old, int new, int threshold)
{
return old >= threshold && new < threshold;
}
static bool is_enabling(int old, int new, int threshold)
{
return old < threshold && new >= threshold;
}
static bool intel_crtc_active(struct intel_crtc *crtc)
{
/* Be paranoid as we can arrive here with only partial
* state retrieved from the hardware during setup.
*
* We can ditch the adjusted_mode.crtc_clock check as soon
* as Haswell has gained clock readout/fastboot support.
*
* We can ditch the crtc->primary->state->fb check as soon as we can
* properly reconstruct framebuffers.
*
* FIXME: The intel_crtc->active here should be switched to
* crtc->state->active once we have proper CRTC states wired up
* for atomic.
*/
return crtc && crtc->active && crtc->base.primary->state->fb &&
crtc->config->hw.adjusted_mode.crtc_clock;
}
static struct intel_crtc *single_enabled_crtc(struct drm_i915_private *dev_priv)
{
struct intel_crtc *crtc, *enabled = NULL;
for_each_intel_crtc(&dev_priv->drm, crtc) {
if (intel_crtc_active(crtc)) {
if (enabled)
return NULL;
enabled = crtc;
}
}
return enabled;
}
static void pnv_update_wm(struct drm_i915_private *dev_priv)
{
struct intel_crtc *crtc;
const struct cxsr_latency *latency;
u32 reg;
unsigned int wm;
latency = intel_get_cxsr_latency(!IS_MOBILE(dev_priv),
dev_priv->is_ddr3,
dev_priv->fsb_freq,
dev_priv->mem_freq);
if (!latency) {
drm_dbg_kms(&dev_priv->drm,
"Unknown FSB/MEM found, disable CxSR\n");
intel_set_memory_cxsr(dev_priv, false);
return;
}
crtc = single_enabled_crtc(dev_priv);
if (crtc) {
const struct drm_framebuffer *fb =
crtc->base.primary->state->fb;
int pixel_rate = crtc->config->pixel_rate;
int cpp = fb->format->cpp[0];
/* Display SR */
wm = intel_calculate_wm(pixel_rate, &pnv_display_wm,
pnv_display_wm.fifo_size,
cpp, latency->display_sr);
reg = intel_uncore_read(&dev_priv->uncore, DSPFW1);
reg &= ~DSPFW_SR_MASK;
reg |= FW_WM(wm, SR);
intel_uncore_write(&dev_priv->uncore, DSPFW1, reg);
drm_dbg_kms(&dev_priv->drm, "DSPFW1 register is %x\n", reg);
/* cursor SR */
wm = intel_calculate_wm(pixel_rate, &pnv_cursor_wm,
pnv_display_wm.fifo_size,
4, latency->cursor_sr);
intel_uncore_rmw(&dev_priv->uncore, DSPFW3, DSPFW_CURSOR_SR_MASK,
FW_WM(wm, CURSOR_SR));
/* Display HPLL off SR */
wm = intel_calculate_wm(pixel_rate, &pnv_display_hplloff_wm,
pnv_display_hplloff_wm.fifo_size,
cpp, latency->display_hpll_disable);
intel_uncore_rmw(&dev_priv->uncore, DSPFW3, DSPFW_HPLL_SR_MASK, FW_WM(wm, HPLL_SR));
/* cursor HPLL off SR */
wm = intel_calculate_wm(pixel_rate, &pnv_cursor_hplloff_wm,
pnv_display_hplloff_wm.fifo_size,
4, latency->cursor_hpll_disable);
reg = intel_uncore_read(&dev_priv->uncore, DSPFW3);
reg &= ~DSPFW_HPLL_CURSOR_MASK;
reg |= FW_WM(wm, HPLL_CURSOR);
intel_uncore_write(&dev_priv->uncore, DSPFW3, reg);
drm_dbg_kms(&dev_priv->drm, "DSPFW3 register is %x\n", reg);
intel_set_memory_cxsr(dev_priv, true);
} else {
intel_set_memory_cxsr(dev_priv, false);
}
}
/*
* Documentation says:
* "If the line size is small, the TLB fetches can get in the way of the
* data fetches, causing some lag in the pixel data return which is not
* accounted for in the above formulas. The following adjustment only
* needs to be applied if eight whole lines fit in the buffer at once.
* The WM is adjusted upwards by the difference between the FIFO size
* and the size of 8 whole lines. This adjustment is always performed
* in the actual pixel depth regardless of whether FBC is enabled or not."
*/
static unsigned int g4x_tlb_miss_wa(int fifo_size, int width, int cpp)
{
int tlb_miss = fifo_size * 64 - width * cpp * 8;
return max(0, tlb_miss);
}
static void g4x_write_wm_values(struct drm_i915_private *dev_priv,
const struct g4x_wm_values *wm)
{
enum pipe pipe;
for_each_pipe(dev_priv, pipe)
trace_g4x_wm(intel_crtc_for_pipe(dev_priv, pipe), wm);
intel_uncore_write(&dev_priv->uncore, DSPFW1,
FW_WM(wm->sr.plane, SR) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_CURSOR], CURSORB) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_PRIMARY], PLANEB) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_PRIMARY], PLANEA));
intel_uncore_write(&dev_priv->uncore, DSPFW2,
(wm->fbc_en ? DSPFW_FBC_SR_EN : 0) |
FW_WM(wm->sr.fbc, FBC_SR) |
FW_WM(wm->hpll.fbc, FBC_HPLL_SR) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE0], SPRITEB) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_CURSOR], CURSORA) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE0], SPRITEA));
intel_uncore_write(&dev_priv->uncore, DSPFW3,
(wm->hpll_en ? DSPFW_HPLL_SR_EN : 0) |
FW_WM(wm->sr.cursor, CURSOR_SR) |
FW_WM(wm->hpll.cursor, HPLL_CURSOR) |
FW_WM(wm->hpll.plane, HPLL_SR));
intel_uncore_posting_read(&dev_priv->uncore, DSPFW1);
}
#define FW_WM_VLV(value, plane) \
(((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK_VLV)
static void vlv_write_wm_values(struct drm_i915_private *dev_priv,
const struct vlv_wm_values *wm)
{
enum pipe pipe;
for_each_pipe(dev_priv, pipe) {
trace_vlv_wm(intel_crtc_for_pipe(dev_priv, pipe), wm);
intel_uncore_write(&dev_priv->uncore, VLV_DDL(pipe),
(wm->ddl[pipe].plane[PLANE_CURSOR] << DDL_CURSOR_SHIFT) |
(wm->ddl[pipe].plane[PLANE_SPRITE1] << DDL_SPRITE_SHIFT(1)) |
(wm->ddl[pipe].plane[PLANE_SPRITE0] << DDL_SPRITE_SHIFT(0)) |
(wm->ddl[pipe].plane[PLANE_PRIMARY] << DDL_PLANE_SHIFT));
}
/*
* Zero the (unused) WM1 watermarks, and also clear all the
* high order bits so that there are no out of bounds values
* present in the registers during the reprogramming.
*/
intel_uncore_write(&dev_priv->uncore, DSPHOWM, 0);
intel_uncore_write(&dev_priv->uncore, DSPHOWM1, 0);
intel_uncore_write(&dev_priv->uncore, DSPFW4, 0);
intel_uncore_write(&dev_priv->uncore, DSPFW5, 0);
intel_uncore_write(&dev_priv->uncore, DSPFW6, 0);
intel_uncore_write(&dev_priv->uncore, DSPFW1,
FW_WM(wm->sr.plane, SR) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_CURSOR], CURSORB) |
FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_PRIMARY], PLANEB) |
FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_PRIMARY], PLANEA));
intel_uncore_write(&dev_priv->uncore, DSPFW2,
FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_SPRITE1], SPRITEB) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_CURSOR], CURSORA) |
FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_SPRITE0], SPRITEA));
intel_uncore_write(&dev_priv->uncore, DSPFW3,
FW_WM(wm->sr.cursor, CURSOR_SR));
if (IS_CHERRYVIEW(dev_priv)) {
intel_uncore_write(&dev_priv->uncore, DSPFW7_CHV,
FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE1], SPRITED) |
FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE0], SPRITEC));
intel_uncore_write(&dev_priv->uncore, DSPFW8_CHV,
FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_SPRITE1], SPRITEF) |
FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_SPRITE0], SPRITEE));
intel_uncore_write(&dev_priv->uncore, DSPFW9_CHV,
FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_PRIMARY], PLANEC) |
FW_WM(wm->pipe[PIPE_C].plane[PLANE_CURSOR], CURSORC));
intel_uncore_write(&dev_priv->uncore, DSPHOWM,
FW_WM(wm->sr.plane >> 9, SR_HI) |
FW_WM(wm->pipe[PIPE_C].plane[PLANE_SPRITE1] >> 8, SPRITEF_HI) |
FW_WM(wm->pipe[PIPE_C].plane[PLANE_SPRITE0] >> 8, SPRITEE_HI) |
FW_WM(wm->pipe[PIPE_C].plane[PLANE_PRIMARY] >> 8, PLANEC_HI) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE1] >> 8, SPRITED_HI) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE0] >> 8, SPRITEC_HI) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_PRIMARY] >> 8, PLANEB_HI) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE1] >> 8, SPRITEB_HI) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE0] >> 8, SPRITEA_HI) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_PRIMARY] >> 8, PLANEA_HI));
} else {
intel_uncore_write(&dev_priv->uncore, DSPFW7,
FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE1], SPRITED) |
FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE0], SPRITEC));
intel_uncore_write(&dev_priv->uncore, DSPHOWM,
FW_WM(wm->sr.plane >> 9, SR_HI) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE1] >> 8, SPRITED_HI) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE0] >> 8, SPRITEC_HI) |
FW_WM(wm->pipe[PIPE_B].plane[PLANE_PRIMARY] >> 8, PLANEB_HI) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE1] >> 8, SPRITEB_HI) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE0] >> 8, SPRITEA_HI) |
FW_WM(wm->pipe[PIPE_A].plane[PLANE_PRIMARY] >> 8, PLANEA_HI));
}
intel_uncore_posting_read(&dev_priv->uncore, DSPFW1);
}
#undef FW_WM_VLV
static void g4x_setup_wm_latency(struct drm_i915_private *dev_priv)
{
/* all latencies in usec */
dev_priv->display.wm.pri_latency[G4X_WM_LEVEL_NORMAL] = 5;
dev_priv->display.wm.pri_latency[G4X_WM_LEVEL_SR] = 12;
dev_priv->display.wm.pri_latency[G4X_WM_LEVEL_HPLL] = 35;
dev_priv->display.wm.num_levels = G4X_WM_LEVEL_HPLL + 1;
}
static int g4x_plane_fifo_size(enum plane_id plane_id, int level)
{
/*
* DSPCNTR[13] supposedly controls whether the
* primary plane can use the FIFO space otherwise
* reserved for the sprite plane. It's not 100% clear
* what the actual FIFO size is, but it looks like we
* can happily set both primary and sprite watermarks
* up to 127 cachelines. So that would seem to mean
* that either DSPCNTR[13] doesn't do anything, or that
* the total FIFO is >= 256 cachelines in size. Either
* way, we don't seem to have to worry about this
* repartitioning as the maximum watermark value the
* register can hold for each plane is lower than the
* minimum FIFO size.
*/
switch (plane_id) {
case PLANE_CURSOR:
return 63;
case PLANE_PRIMARY:
return level == G4X_WM_LEVEL_NORMAL ? 127 : 511;
case PLANE_SPRITE0:
return level == G4X_WM_LEVEL_NORMAL ? 127 : 0;
default:
MISSING_CASE(plane_id);
return 0;
}
}
static int g4x_fbc_fifo_size(int level)
{
switch (level) {
case G4X_WM_LEVEL_SR:
return 7;
case G4X_WM_LEVEL_HPLL:
return 15;
default:
MISSING_CASE(level);
return 0;
}
}
static u16 g4x_compute_wm(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
int level)
{
struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
const struct drm_display_mode *pipe_mode =
&crtc_state->hw.pipe_mode;
unsigned int latency = dev_priv->display.wm.pri_latency[level] * 10;
unsigned int pixel_rate, htotal, cpp, width, wm;
if (latency == 0)
return USHRT_MAX;
if (!intel_wm_plane_visible(crtc_state, plane_state))
return 0;
cpp = plane_state->hw.fb->format->cpp[0];
/*
* WaUse32BppForSRWM:ctg,elk
*
* The spec fails to list this restriction for the
* HPLL watermark, which seems a little strange.
* Let's use 32bpp for the HPLL watermark as well.
*/
if (plane->id == PLANE_PRIMARY &&
level != G4X_WM_LEVEL_NORMAL)
cpp = max(cpp, 4u);
pixel_rate = crtc_state->pixel_rate;
htotal = pipe_mode->crtc_htotal;
width = drm_rect_width(&plane_state->uapi.src) >> 16;
if (plane->id == PLANE_CURSOR) {
wm = intel_wm_method2(pixel_rate, htotal, width, cpp, latency);
} else if (plane->id == PLANE_PRIMARY &&
level == G4X_WM_LEVEL_NORMAL) {
wm = intel_wm_method1(pixel_rate, cpp, latency);
} else {
unsigned int small, large;
small = intel_wm_method1(pixel_rate, cpp, latency);
large = intel_wm_method2(pixel_rate, htotal, width, cpp, latency);
wm = min(small, large);
}
wm += g4x_tlb_miss_wa(g4x_plane_fifo_size(plane->id, level),
width, cpp);
wm = DIV_ROUND_UP(wm, 64) + 2;
return min_t(unsigned int, wm, USHRT_MAX);
}
static bool g4x_raw_plane_wm_set(struct intel_crtc_state *crtc_state,
int level, enum plane_id plane_id, u16 value)
{
struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
bool dirty = false;
for (; level < dev_priv->display.wm.num_levels; level++) {
struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level];
dirty |= raw->plane[plane_id] != value;
raw->plane[plane_id] = value;
}
return dirty;
}
static bool g4x_raw_fbc_wm_set(struct intel_crtc_state *crtc_state,
int level, u16 value)
{
struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
bool dirty = false;
/* NORMAL level doesn't have an FBC watermark */
level = max(level, G4X_WM_LEVEL_SR);
for (; level < dev_priv->display.wm.num_levels; level++) {
struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level];
dirty |= raw->fbc != value;
raw->fbc = value;
}
return dirty;
}
static u32 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
u32 pri_val);
static bool g4x_raw_plane_wm_compute(struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state)
{
struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
enum plane_id plane_id = plane->id;
bool dirty = false;
int level;
if (!intel_wm_plane_visible(crtc_state, plane_state)) {
dirty |= g4x_raw_plane_wm_set(crtc_state, 0, plane_id, 0);
if (plane_id == PLANE_PRIMARY)
dirty |= g4x_raw_fbc_wm_set(crtc_state, 0, 0);
goto out;
}
for (level = 0; level < dev_priv->display.wm.num_levels; level++) {
struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level];
int wm, max_wm;
wm = g4x_compute_wm(crtc_state, plane_state, level);
max_wm = g4x_plane_fifo_size(plane_id, level);
if (wm > max_wm)
break;
dirty |= raw->plane[plane_id] != wm;
raw->plane[plane_id] = wm;
if (plane_id != PLANE_PRIMARY ||
level == G4X_WM_LEVEL_NORMAL)
continue;
wm = ilk_compute_fbc_wm(crtc_state, plane_state,
raw->plane[plane_id]);
max_wm = g4x_fbc_fifo_size(level);
/*
* FBC wm is not mandatory as we
* can always just disable its use.
*/
if (wm > max_wm)
wm = USHRT_MAX;
dirty |= raw->fbc != wm;
raw->fbc = wm;
}
/* mark watermarks as invalid */
dirty |= g4x_raw_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX);
if (plane_id == PLANE_PRIMARY)
dirty |= g4x_raw_fbc_wm_set(crtc_state, level, USHRT_MAX);
out:
if (dirty) {
drm_dbg_kms(&dev_priv->drm,
"%s watermarks: normal=%d, SR=%d, HPLL=%d\n",
plane->base.name,
crtc_state->wm.g4x.raw[G4X_WM_LEVEL_NORMAL].plane[plane_id],
crtc_state->wm.g4x.raw[G4X_WM_LEVEL_SR].plane[plane_id],
crtc_state->wm.g4x.raw[G4X_WM_LEVEL_HPLL].plane[plane_id]);
if (plane_id == PLANE_PRIMARY)
drm_dbg_kms(&dev_priv->drm,
"FBC watermarks: SR=%d, HPLL=%d\n",
crtc_state->wm.g4x.raw[G4X_WM_LEVEL_SR].fbc,
crtc_state->wm.g4x.raw[G4X_WM_LEVEL_HPLL].fbc);
}
return dirty;
}
static bool g4x_raw_plane_wm_is_valid(const struct intel_crtc_state *crtc_state,
enum plane_id plane_id, int level)
{
const struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level];
return raw->plane[plane_id] <= g4x_plane_fifo_size(plane_id, level);
}
static bool g4x_raw_crtc_wm_is_valid(const struct intel_crtc_state *crtc_state,
int level)
{
struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
if (level >= dev_priv->display.wm.num_levels)
return false;
return g4x_raw_plane_wm_is_valid(crtc_state, PLANE_PRIMARY, level) &&
g4x_raw_plane_wm_is_valid(crtc_state, PLANE_SPRITE0, level) &&
g4x_raw_plane_wm_is_valid(crtc_state, PLANE_CURSOR, level);
}
/* mark all levels starting from 'level' as invalid */
static void g4x_invalidate_wms(struct intel_crtc *crtc,
struct g4x_wm_state *wm_state, int level)
{
if (level <= G4X_WM_LEVEL_NORMAL) {
enum plane_id plane_id;
for_each_plane_id_on_crtc(crtc, plane_id)
wm_state->wm.plane[plane_id] = USHRT_MAX;
}
if (level <= G4X_WM_LEVEL_SR) {
wm_state->cxsr = false;
wm_state->sr.cursor = USHRT_MAX;
wm_state->sr.plane = USHRT_MAX;
wm_state->sr.fbc = USHRT_MAX;
}
if (level <= G4X_WM_LEVEL_HPLL) {
wm_state->hpll_en = false;
wm_state->hpll.cursor = USHRT_MAX;
wm_state->hpll.plane = USHRT_MAX;
wm_state->hpll.fbc = USHRT_MAX;
}
}
static bool g4x_compute_fbc_en(const struct g4x_wm_state *wm_state,
int level)
{
if (level < G4X_WM_LEVEL_SR)
return false;
if (level >= G4X_WM_LEVEL_SR &&
wm_state->sr.fbc > g4x_fbc_fifo_size(G4X_WM_LEVEL_SR))
return false;
if (level >= G4X_WM_LEVEL_HPLL &&
wm_state->hpll.fbc > g4x_fbc_fifo_size(G4X_WM_LEVEL_HPLL))
return false;
return true;
}
static int _g4x_compute_pipe_wm(struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct g4x_wm_state *wm_state = &crtc_state->wm.g4x.optimal;
u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR);
const struct g4x_pipe_wm *raw;
enum plane_id plane_id;
int level;
level = G4X_WM_LEVEL_NORMAL;
if (!g4x_raw_crtc_wm_is_valid(crtc_state, level))
goto out;
raw = &crtc_state->wm.g4x.raw[level];
for_each_plane_id_on_crtc(crtc, plane_id)
wm_state->wm.plane[plane_id] = raw->plane[plane_id];
level = G4X_WM_LEVEL_SR;
if (!g4x_raw_crtc_wm_is_valid(crtc_state, level))
goto out;
raw = &crtc_state->wm.g4x.raw[level];
wm_state->sr.plane = raw->plane[PLANE_PRIMARY];
wm_state->sr.cursor = raw->plane[PLANE_CURSOR];
wm_state->sr.fbc = raw->fbc;
wm_state->cxsr = active_planes == BIT(PLANE_PRIMARY);
level = G4X_WM_LEVEL_HPLL;
if (!g4x_raw_crtc_wm_is_valid(crtc_state, level))
goto out;
raw = &crtc_state->wm.g4x.raw[level];
wm_state->hpll.plane = raw->plane[PLANE_PRIMARY];
wm_state->hpll.cursor = raw->plane[PLANE_CURSOR];
wm_state->hpll.fbc = raw->fbc;
wm_state->hpll_en = wm_state->cxsr;
level++;
out:
if (level == G4X_WM_LEVEL_NORMAL)
return -EINVAL;
/* invalidate the higher levels */
g4x_invalidate_wms(crtc, wm_state, level);
/*
* Determine if the FBC watermark(s) can be used. IF
* this isn't the case we prefer to disable the FBC
* watermark(s) rather than disable the SR/HPLL
* level(s) entirely. 'level-1' is the highest valid
* level here.
*/
wm_state->fbc_en = g4x_compute_fbc_en(wm_state, level - 1);
return 0;
}
static int g4x_compute_pipe_wm(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
const struct intel_plane_state *old_plane_state;
const struct intel_plane_state *new_plane_state;
struct intel_plane *plane;
unsigned int dirty = 0;
int i;
for_each_oldnew_intel_plane_in_state(state, plane,
old_plane_state,
new_plane_state, i) {
if (new_plane_state->hw.crtc != &crtc->base &&
old_plane_state->hw.crtc != &crtc->base)
continue;
if (g4x_raw_plane_wm_compute(crtc_state, new_plane_state))
dirty |= BIT(plane->id);
}
if (!dirty)
return 0;
return _g4x_compute_pipe_wm(crtc_state);
}
static int g4x_compute_intermediate_wm(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
struct intel_crtc_state *new_crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
const struct intel_crtc_state *old_crtc_state =
intel_atomic_get_old_crtc_state(state, crtc);
struct g4x_wm_state *intermediate = &new_crtc_state->wm.g4x.intermediate;
const struct g4x_wm_state *optimal = &new_crtc_state->wm.g4x.optimal;
const struct g4x_wm_state *active = &old_crtc_state->wm.g4x.optimal;
enum plane_id plane_id;
if (!new_crtc_state->hw.active ||
intel_crtc_needs_modeset(new_crtc_state)) {
*intermediate = *optimal;
intermediate->cxsr = false;
intermediate->hpll_en = false;
goto out;
}
intermediate->cxsr = optimal->cxsr && active->cxsr &&
!new_crtc_state->disable_cxsr;
intermediate->hpll_en = optimal->hpll_en && active->hpll_en &&
!new_crtc_state->disable_cxsr;
intermediate->fbc_en = optimal->fbc_en && active->fbc_en;
for_each_plane_id_on_crtc(crtc, plane_id) {
intermediate->wm.plane[plane_id] =
max(optimal->wm.plane[plane_id],
active->wm.plane[plane_id]);
drm_WARN_ON(&dev_priv->drm, intermediate->wm.plane[plane_id] >
g4x_plane_fifo_size(plane_id, G4X_WM_LEVEL_NORMAL));
}
intermediate->sr.plane = max(optimal->sr.plane,
active->sr.plane);
intermediate->sr.cursor = max(optimal->sr.cursor,
active->sr.cursor);
intermediate->sr.fbc = max(optimal->sr.fbc,
active->sr.fbc);
intermediate->hpll.plane = max(optimal->hpll.plane,
active->hpll.plane);
intermediate->hpll.cursor = max(optimal->hpll.cursor,
active->hpll.cursor);
intermediate->hpll.fbc = max(optimal->hpll.fbc,
active->hpll.fbc);
drm_WARN_ON(&dev_priv->drm,
(intermediate->sr.plane >
g4x_plane_fifo_size(PLANE_PRIMARY, G4X_WM_LEVEL_SR) ||
intermediate->sr.cursor >
g4x_plane_fifo_size(PLANE_CURSOR, G4X_WM_LEVEL_SR)) &&
intermediate->cxsr);
drm_WARN_ON(&dev_priv->drm,
(intermediate->sr.plane >
g4x_plane_fifo_size(PLANE_PRIMARY, G4X_WM_LEVEL_HPLL) ||
intermediate->sr.cursor >
g4x_plane_fifo_size(PLANE_CURSOR, G4X_WM_LEVEL_HPLL)) &&
intermediate->hpll_en);
drm_WARN_ON(&dev_priv->drm,
intermediate->sr.fbc > g4x_fbc_fifo_size(1) &&
intermediate->fbc_en && intermediate->cxsr);
drm_WARN_ON(&dev_priv->drm,
intermediate->hpll.fbc > g4x_fbc_fifo_size(2) &&
intermediate->fbc_en && intermediate->hpll_en);
out:
/*
* If our intermediate WM are identical to the final WM, then we can
* omit the post-vblank programming; only update if it's different.
*/
if (memcmp(intermediate, optimal, sizeof(*intermediate)) != 0)
new_crtc_state->wm.need_postvbl_update = true;
return 0;
}
static void g4x_merge_wm(struct drm_i915_private *dev_priv,
struct g4x_wm_values *wm)
{
struct intel_crtc *crtc;
int num_active_pipes = 0;
wm->cxsr = true;
wm->hpll_en = true;
wm->fbc_en = true;
for_each_intel_crtc(&dev_priv->drm, crtc) {
const struct g4x_wm_state *wm_state = &crtc->wm.active.g4x;
if (!crtc->active)
continue;
if (!wm_state->cxsr)
wm->cxsr = false;
if (!wm_state->hpll_en)
wm->hpll_en = false;
if (!wm_state->fbc_en)
wm->fbc_en = false;
num_active_pipes++;
}
if (num_active_pipes != 1) {
wm->cxsr = false;
wm->hpll_en = false;
wm->fbc_en = false;
}
for_each_intel_crtc(&dev_priv->drm, crtc) {
const struct g4x_wm_state *wm_state = &crtc->wm.active.g4x;
enum pipe pipe = crtc->pipe;
wm->pipe[pipe] = wm_state->wm;
if (crtc->active && wm->cxsr)
wm->sr = wm_state->sr;
if (crtc->active && wm->hpll_en)
wm->hpll = wm_state->hpll;
}
}
static void g4x_program_watermarks(struct drm_i915_private *dev_priv)
{
struct g4x_wm_values *old_wm = &dev_priv->display.wm.g4x;
struct g4x_wm_values new_wm = {};
g4x_merge_wm(dev_priv, &new_wm);
if (memcmp(old_wm, &new_wm, sizeof(new_wm)) == 0)
return;
if (is_disabling(old_wm->cxsr, new_wm.cxsr, true))
_intel_set_memory_cxsr(dev_priv, false);
g4x_write_wm_values(dev_priv, &new_wm);
if (is_enabling(old_wm->cxsr, new_wm.cxsr, true))
_intel_set_memory_cxsr(dev_priv, true);
*old_wm = new_wm;
}
static void g4x_initial_watermarks(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
mutex_lock(&dev_priv->display.wm.wm_mutex);
crtc->wm.active.g4x = crtc_state->wm.g4x.intermediate;
g4x_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
static void g4x_optimize_watermarks(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
if (!crtc_state->wm.need_postvbl_update)
return;
mutex_lock(&dev_priv->display.wm.wm_mutex);
crtc->wm.active.g4x = crtc_state->wm.g4x.optimal;
g4x_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
/* latency must be in 0.1us units. */
static unsigned int vlv_wm_method2(unsigned int pixel_rate,
unsigned int htotal,
unsigned int width,
unsigned int cpp,
unsigned int latency)
{
unsigned int ret;
ret = intel_wm_method2(pixel_rate, htotal,
width, cpp, latency);
ret = DIV_ROUND_UP(ret, 64);
return ret;
}
static void vlv_setup_wm_latency(struct drm_i915_private *dev_priv)
{
/* all latencies in usec */
dev_priv->display.wm.pri_latency[VLV_WM_LEVEL_PM2] = 3;
dev_priv->display.wm.num_levels = VLV_WM_LEVEL_PM2 + 1;
if (IS_CHERRYVIEW(dev_priv)) {
dev_priv->display.wm.pri_latency[VLV_WM_LEVEL_PM5] = 12;
dev_priv->display.wm.pri_latency[VLV_WM_LEVEL_DDR_DVFS] = 33;
dev_priv->display.wm.num_levels = VLV_WM_LEVEL_DDR_DVFS + 1;
}
}
static u16 vlv_compute_wm_level(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
int level)
{
struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
const struct drm_display_mode *pipe_mode =
&crtc_state->hw.pipe_mode;
unsigned int pixel_rate, htotal, cpp, width, wm;
if (dev_priv->display.wm.pri_latency[level] == 0)
return USHRT_MAX;
if (!intel_wm_plane_visible(crtc_state, plane_state))
return 0;
cpp = plane_state->hw.fb->format->cpp[0];
pixel_rate = crtc_state->pixel_rate;
htotal = pipe_mode->crtc_htotal;
width = drm_rect_width(&plane_state->uapi.src) >> 16;
if (plane->id == PLANE_CURSOR) {
/*
* FIXME the formula gives values that are
* too big for the cursor FIFO, and hence we
* would never be able to use cursors. For
* now just hardcode the watermark.
*/
wm = 63;
} else {
wm = vlv_wm_method2(pixel_rate, htotal, width, cpp,
dev_priv->display.wm.pri_latency[level] * 10);
}
return min_t(unsigned int, wm, USHRT_MAX);
}
static bool vlv_need_sprite0_fifo_workaround(unsigned int active_planes)
{
return (active_planes & (BIT(PLANE_SPRITE0) |
BIT(PLANE_SPRITE1))) == BIT(PLANE_SPRITE1);
}
static int vlv_compute_fifo(struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct g4x_pipe_wm *raw =
&crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM2];
struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state;
u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR);
int num_active_planes = hweight8(active_planes);
const int fifo_size = 511;
int fifo_extra, fifo_left = fifo_size;
int sprite0_fifo_extra = 0;
unsigned int total_rate;
enum plane_id plane_id;
/*
* When enabling sprite0 after sprite1 has already been enabled
* we tend to get an underrun unless sprite0 already has some
* FIFO space allcoated. Hence we always allocate at least one
* cacheline for sprite0 whenever sprite1 is enabled.
*
* All other plane enable sequences appear immune to this problem.
*/
if (vlv_need_sprite0_fifo_workaround(active_planes))
sprite0_fifo_extra = 1;
total_rate = raw->plane[PLANE_PRIMARY] +
raw->plane[PLANE_SPRITE0] +
raw->plane[PLANE_SPRITE1] +
sprite0_fifo_extra;
if (total_rate > fifo_size)
return -EINVAL;
if (total_rate == 0)
total_rate = 1;
for_each_plane_id_on_crtc(crtc, plane_id) {
unsigned int rate;
if ((active_planes & BIT(plane_id)) == 0) {
fifo_state->plane[plane_id] = 0;
continue;
}
rate = raw->plane[plane_id];
fifo_state->plane[plane_id] = fifo_size * rate / total_rate;
fifo_left -= fifo_state->plane[plane_id];
}
fifo_state->plane[PLANE_SPRITE0] += sprite0_fifo_extra;
fifo_left -= sprite0_fifo_extra;
fifo_state->plane[PLANE_CURSOR] = 63;
fifo_extra = DIV_ROUND_UP(fifo_left, num_active_planes ?: 1);
/* spread the remainder evenly */
for_each_plane_id_on_crtc(crtc, plane_id) {
int plane_extra;
if (fifo_left == 0)
break;
if ((active_planes & BIT(plane_id)) == 0)
continue;
plane_extra = min(fifo_extra, fifo_left);
fifo_state->plane[plane_id] += plane_extra;
fifo_left -= plane_extra;
}
drm_WARN_ON(&dev_priv->drm, active_planes != 0 && fifo_left != 0);
/* give it all to the first plane if none are active */
if (active_planes == 0) {
drm_WARN_ON(&dev_priv->drm, fifo_left != fifo_size);
fifo_state->plane[PLANE_PRIMARY] = fifo_left;
}
return 0;
}
/* mark all levels starting from 'level' as invalid */
static void vlv_invalidate_wms(struct intel_crtc *crtc,
struct vlv_wm_state *wm_state, int level)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
for (; level < dev_priv->display.wm.num_levels; level++) {
enum plane_id plane_id;
for_each_plane_id_on_crtc(crtc, plane_id)
wm_state->wm[level].plane[plane_id] = USHRT_MAX;
wm_state->sr[level].cursor = USHRT_MAX;
wm_state->sr[level].plane = USHRT_MAX;
}
}
static u16 vlv_invert_wm_value(u16 wm, u16 fifo_size)
{
if (wm > fifo_size)
return USHRT_MAX;
else
return fifo_size - wm;
}
/*
* Starting from 'level' set all higher
* levels to 'value' in the "raw" watermarks.
*/
static bool vlv_raw_plane_wm_set(struct intel_crtc_state *crtc_state,
int level, enum plane_id plane_id, u16 value)
{
struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
bool dirty = false;
for (; level < dev_priv->display.wm.num_levels; level++) {
struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level];
dirty |= raw->plane[plane_id] != value;
raw->plane[plane_id] = value;
}
return dirty;
}
static bool vlv_raw_plane_wm_compute(struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state)
{
struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
enum plane_id plane_id = plane->id;
int level;
bool dirty = false;
if (!intel_wm_plane_visible(crtc_state, plane_state)) {
dirty |= vlv_raw_plane_wm_set(crtc_state, 0, plane_id, 0);
goto out;
}
for (level = 0; level < dev_priv->display.wm.num_levels; level++) {
struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level];
int wm = vlv_compute_wm_level(crtc_state, plane_state, level);
int max_wm = plane_id == PLANE_CURSOR ? 63 : 511;
if (wm > max_wm)
break;
dirty |= raw->plane[plane_id] != wm;
raw->plane[plane_id] = wm;
}
/* mark all higher levels as invalid */
dirty |= vlv_raw_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX);
out:
if (dirty)
drm_dbg_kms(&dev_priv->drm,
"%s watermarks: PM2=%d, PM5=%d, DDR DVFS=%d\n",
plane->base.name,
crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM2].plane[plane_id],
crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM5].plane[plane_id],
crtc_state->wm.vlv.raw[VLV_WM_LEVEL_DDR_DVFS].plane[plane_id]);
return dirty;
}
static bool vlv_raw_plane_wm_is_valid(const struct intel_crtc_state *crtc_state,
enum plane_id plane_id, int level)
{
const struct g4x_pipe_wm *raw =
&crtc_state->wm.vlv.raw[level];
const struct vlv_fifo_state *fifo_state =
&crtc_state->wm.vlv.fifo_state;
return raw->plane[plane_id] <= fifo_state->plane[plane_id];
}
static bool vlv_raw_crtc_wm_is_valid(const struct intel_crtc_state *crtc_state, int level)
{
return vlv_raw_plane_wm_is_valid(crtc_state, PLANE_PRIMARY, level) &&
vlv_raw_plane_wm_is_valid(crtc_state, PLANE_SPRITE0, level) &&
vlv_raw_plane_wm_is_valid(crtc_state, PLANE_SPRITE1, level) &&
vlv_raw_plane_wm_is_valid(crtc_state, PLANE_CURSOR, level);
}
static int _vlv_compute_pipe_wm(struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
struct vlv_wm_state *wm_state = &crtc_state->wm.vlv.optimal;
const struct vlv_fifo_state *fifo_state =
&crtc_state->wm.vlv.fifo_state;
u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR);
int num_active_planes = hweight8(active_planes);
enum plane_id plane_id;
int level;
/* initially allow all levels */
wm_state->num_levels = dev_priv->display.wm.num_levels;
/*
* Note that enabling cxsr with no primary/sprite planes
* enabled can wedge the pipe. Hence we only allow cxsr
* with exactly one enabled primary/sprite plane.
*/
wm_state->cxsr = crtc->pipe != PIPE_C && num_active_planes == 1;
for (level = 0; level < wm_state->num_levels; level++) {
const struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level];
const int sr_fifo_size = INTEL_NUM_PIPES(dev_priv) * 512 - 1;
if (!vlv_raw_crtc_wm_is_valid(crtc_state, level))
break;
for_each_plane_id_on_crtc(crtc, plane_id) {
wm_state->wm[level].plane[plane_id] =
vlv_invert_wm_value(raw->plane[plane_id],
fifo_state->plane[plane_id]);
}
wm_state->sr[level].plane =
vlv_invert_wm_value(max3(raw->plane[PLANE_PRIMARY],
raw->plane[PLANE_SPRITE0],
raw->plane[PLANE_SPRITE1]),
sr_fifo_size);
wm_state->sr[level].cursor =
vlv_invert_wm_value(raw->plane[PLANE_CURSOR],
63);
}
if (level == 0)
return -EINVAL;
/* limit to only levels we can actually handle */
wm_state->num_levels = level;
/* invalidate the higher levels */
vlv_invalidate_wms(crtc, wm_state, level);
return 0;
}
static int vlv_compute_pipe_wm(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
const struct intel_plane_state *old_plane_state;
const struct intel_plane_state *new_plane_state;
struct intel_plane *plane;
unsigned int dirty = 0;
int i;
for_each_oldnew_intel_plane_in_state(state, plane,
old_plane_state,
new_plane_state, i) {
if (new_plane_state->hw.crtc != &crtc->base &&
old_plane_state->hw.crtc != &crtc->base)
continue;
if (vlv_raw_plane_wm_compute(crtc_state, new_plane_state))
dirty |= BIT(plane->id);
}
/*
* DSPARB registers may have been reset due to the
* power well being turned off. Make sure we restore
* them to a consistent state even if no primary/sprite
* planes are initially active. We also force a FIFO
* recomputation so that we are sure to sanitize the
* FIFO setting we took over from the BIOS even if there
* are no active planes on the crtc.
*/
if (intel_crtc_needs_modeset(crtc_state))
dirty = ~0;
if (!dirty)
return 0;
/* cursor changes don't warrant a FIFO recompute */
if (dirty & ~BIT(PLANE_CURSOR)) {
const struct intel_crtc_state *old_crtc_state =
intel_atomic_get_old_crtc_state(state, crtc);
const struct vlv_fifo_state *old_fifo_state =
&old_crtc_state->wm.vlv.fifo_state;
const struct vlv_fifo_state *new_fifo_state =
&crtc_state->wm.vlv.fifo_state;
int ret;
ret = vlv_compute_fifo(crtc_state);
if (ret)
return ret;
if (intel_crtc_needs_modeset(crtc_state) ||
memcmp(old_fifo_state, new_fifo_state,
sizeof(*new_fifo_state)) != 0)
crtc_state->fifo_changed = true;
}
return _vlv_compute_pipe_wm(crtc_state);
}
#define VLV_FIFO(plane, value) \
(((value) << DSPARB_ ## plane ## _SHIFT_VLV) & DSPARB_ ## plane ## _MASK_VLV)
static void vlv_atomic_update_fifo(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
struct intel_uncore *uncore = &dev_priv->uncore;
const struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
const struct vlv_fifo_state *fifo_state =
&crtc_state->wm.vlv.fifo_state;
int sprite0_start, sprite1_start, fifo_size;
u32 dsparb, dsparb2, dsparb3;
if (!crtc_state->fifo_changed)
return;
sprite0_start = fifo_state->plane[PLANE_PRIMARY];
sprite1_start = fifo_state->plane[PLANE_SPRITE0] + sprite0_start;
fifo_size = fifo_state->plane[PLANE_SPRITE1] + sprite1_start;
drm_WARN_ON(&dev_priv->drm, fifo_state->plane[PLANE_CURSOR] != 63);
drm_WARN_ON(&dev_priv->drm, fifo_size != 511);
trace_vlv_fifo_size(crtc, sprite0_start, sprite1_start, fifo_size);
/*
* uncore.lock serves a double purpose here. It allows us to
* use the less expensive I915_{READ,WRITE}_FW() functions, and
* it protects the DSPARB registers from getting clobbered by
* parallel updates from multiple pipes.
*
* intel_pipe_update_start() has already disabled interrupts
* for us, so a plain spin_lock() is sufficient here.
*/
spin_lock(&uncore->lock);
switch (crtc->pipe) {
case PIPE_A:
dsparb = intel_uncore_read_fw(uncore, DSPARB);
dsparb2 = intel_uncore_read_fw(uncore, DSPARB2);
dsparb &= ~(VLV_FIFO(SPRITEA, 0xff) |
VLV_FIFO(SPRITEB, 0xff));
dsparb |= (VLV_FIFO(SPRITEA, sprite0_start) |
VLV_FIFO(SPRITEB, sprite1_start));
dsparb2 &= ~(VLV_FIFO(SPRITEA_HI, 0x1) |
VLV_FIFO(SPRITEB_HI, 0x1));
dsparb2 |= (VLV_FIFO(SPRITEA_HI, sprite0_start >> 8) |
VLV_FIFO(SPRITEB_HI, sprite1_start >> 8));
intel_uncore_write_fw(uncore, DSPARB, dsparb);
intel_uncore_write_fw(uncore, DSPARB2, dsparb2);
break;
case PIPE_B:
dsparb = intel_uncore_read_fw(uncore, DSPARB);
dsparb2 = intel_uncore_read_fw(uncore, DSPARB2);
dsparb &= ~(VLV_FIFO(SPRITEC, 0xff) |
VLV_FIFO(SPRITED, 0xff));
dsparb |= (VLV_FIFO(SPRITEC, sprite0_start) |
VLV_FIFO(SPRITED, sprite1_start));
dsparb2 &= ~(VLV_FIFO(SPRITEC_HI, 0xff) |
VLV_FIFO(SPRITED_HI, 0xff));
dsparb2 |= (VLV_FIFO(SPRITEC_HI, sprite0_start >> 8) |
VLV_FIFO(SPRITED_HI, sprite1_start >> 8));
intel_uncore_write_fw(uncore, DSPARB, dsparb);
intel_uncore_write_fw(uncore, DSPARB2, dsparb2);
break;
case PIPE_C:
dsparb3 = intel_uncore_read_fw(uncore, DSPARB3);
dsparb2 = intel_uncore_read_fw(uncore, DSPARB2);
dsparb3 &= ~(VLV_FIFO(SPRITEE, 0xff) |
VLV_FIFO(SPRITEF, 0xff));
dsparb3 |= (VLV_FIFO(SPRITEE, sprite0_start) |
VLV_FIFO(SPRITEF, sprite1_start));
dsparb2 &= ~(VLV_FIFO(SPRITEE_HI, 0xff) |
VLV_FIFO(SPRITEF_HI, 0xff));
dsparb2 |= (VLV_FIFO(SPRITEE_HI, sprite0_start >> 8) |
VLV_FIFO(SPRITEF_HI, sprite1_start >> 8));
intel_uncore_write_fw(uncore, DSPARB3, dsparb3);
intel_uncore_write_fw(uncore, DSPARB2, dsparb2);
break;
default:
break;
}
intel_uncore_posting_read_fw(uncore, DSPARB);
spin_unlock(&uncore->lock);
}
#undef VLV_FIFO
static int vlv_compute_intermediate_wm(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct intel_crtc_state *new_crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
const struct intel_crtc_state *old_crtc_state =
intel_atomic_get_old_crtc_state(state, crtc);
struct vlv_wm_state *intermediate = &new_crtc_state->wm.vlv.intermediate;
const struct vlv_wm_state *optimal = &new_crtc_state->wm.vlv.optimal;
const struct vlv_wm_state *active = &old_crtc_state->wm.vlv.optimal;
int level;
if (!new_crtc_state->hw.active ||
intel_crtc_needs_modeset(new_crtc_state)) {
*intermediate = *optimal;
intermediate->cxsr = false;
goto out;
}
intermediate->num_levels = min(optimal->num_levels, active->num_levels);
intermediate->cxsr = optimal->cxsr && active->cxsr &&
!new_crtc_state->disable_cxsr;
for (level = 0; level < intermediate->num_levels; level++) {
enum plane_id plane_id;
for_each_plane_id_on_crtc(crtc, plane_id) {
intermediate->wm[level].plane[plane_id] =
min(optimal->wm[level].plane[plane_id],
active->wm[level].plane[plane_id]);
}
intermediate->sr[level].plane = min(optimal->sr[level].plane,
active->sr[level].plane);
intermediate->sr[level].cursor = min(optimal->sr[level].cursor,
active->sr[level].cursor);
}
vlv_invalidate_wms(crtc, intermediate, level);
out:
/*
* If our intermediate WM are identical to the final WM, then we can
* omit the post-vblank programming; only update if it's different.
*/
if (memcmp(intermediate, optimal, sizeof(*intermediate)) != 0)
new_crtc_state->wm.need_postvbl_update = true;
return 0;
}
static void vlv_merge_wm(struct drm_i915_private *dev_priv,
struct vlv_wm_values *wm)
{
struct intel_crtc *crtc;
int num_active_pipes = 0;
wm->level = dev_priv->display.wm.num_levels - 1;
wm->cxsr = true;
for_each_intel_crtc(&dev_priv->drm, crtc) {
const struct vlv_wm_state *wm_state = &crtc->wm.active.vlv;
if (!crtc->active)
continue;
if (!wm_state->cxsr)
wm->cxsr = false;
num_active_pipes++;
wm->level = min_t(int, wm->level, wm_state->num_levels - 1);
}
if (num_active_pipes != 1)
wm->cxsr = false;
if (num_active_pipes > 1)
wm->level = VLV_WM_LEVEL_PM2;
for_each_intel_crtc(&dev_priv->drm, crtc) {
const struct vlv_wm_state *wm_state = &crtc->wm.active.vlv;
enum pipe pipe = crtc->pipe;
wm->pipe[pipe] = wm_state->wm[wm->level];
if (crtc->active && wm->cxsr)
wm->sr = wm_state->sr[wm->level];
wm->ddl[pipe].plane[PLANE_PRIMARY] = DDL_PRECISION_HIGH | 2;
wm->ddl[pipe].plane[PLANE_SPRITE0] = DDL_PRECISION_HIGH | 2;
wm->ddl[pipe].plane[PLANE_SPRITE1] = DDL_PRECISION_HIGH | 2;
wm->ddl[pipe].plane[PLANE_CURSOR] = DDL_PRECISION_HIGH | 2;
}
}
static void vlv_program_watermarks(struct drm_i915_private *dev_priv)
{
struct vlv_wm_values *old_wm = &dev_priv->display.wm.vlv;
struct vlv_wm_values new_wm = {};
vlv_merge_wm(dev_priv, &new_wm);
if (memcmp(old_wm, &new_wm, sizeof(new_wm)) == 0)
return;
if (is_disabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_DDR_DVFS))
chv_set_memory_dvfs(dev_priv, false);
if (is_disabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_PM5))
chv_set_memory_pm5(dev_priv, false);
if (is_disabling(old_wm->cxsr, new_wm.cxsr, true))
_intel_set_memory_cxsr(dev_priv, false);
vlv_write_wm_values(dev_priv, &new_wm);
if (is_enabling(old_wm->cxsr, new_wm.cxsr, true))
_intel_set_memory_cxsr(dev_priv, true);
if (is_enabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_PM5))
chv_set_memory_pm5(dev_priv, true);
if (is_enabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_DDR_DVFS))
chv_set_memory_dvfs(dev_priv, true);
*old_wm = new_wm;
}
static void vlv_initial_watermarks(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
mutex_lock(&dev_priv->display.wm.wm_mutex);
crtc->wm.active.vlv = crtc_state->wm.vlv.intermediate;
vlv_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
static void vlv_optimize_watermarks(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
if (!crtc_state->wm.need_postvbl_update)
return;
mutex_lock(&dev_priv->display.wm.wm_mutex);
crtc->wm.active.vlv = crtc_state->wm.vlv.optimal;
vlv_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
static void i965_update_wm(struct drm_i915_private *dev_priv)
{
struct intel_crtc *crtc;
int srwm = 1;
int cursor_sr = 16;
bool cxsr_enabled;
/* Calc sr entries for one plane configs */
crtc = single_enabled_crtc(dev_priv);
if (crtc) {
/* self-refresh has much higher latency */
static const int sr_latency_ns = 12000;
const struct drm_display_mode *pipe_mode =
&crtc->config->hw.pipe_mode;
const struct drm_framebuffer *fb =
crtc->base.primary->state->fb;
int pixel_rate = crtc->config->pixel_rate;
int htotal = pipe_mode->crtc_htotal;
int width = drm_rect_width(&crtc->base.primary->state->src) >> 16;
int cpp = fb->format->cpp[0];
int entries;
entries = intel_wm_method2(pixel_rate, htotal,
width, cpp, sr_latency_ns / 100);
entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE);
srwm = I965_FIFO_SIZE - entries;
if (srwm < 0)
srwm = 1;
srwm &= 0x1ff;
drm_dbg_kms(&dev_priv->drm,
"self-refresh entries: %d, wm: %d\n",
entries, srwm);
entries = intel_wm_method2(pixel_rate, htotal,
crtc->base.cursor->state->crtc_w, 4,
sr_latency_ns / 100);
entries = DIV_ROUND_UP(entries,
i965_cursor_wm_info.cacheline_size) +
i965_cursor_wm_info.guard_size;
cursor_sr = i965_cursor_wm_info.fifo_size - entries;
if (cursor_sr > i965_cursor_wm_info.max_wm)
cursor_sr = i965_cursor_wm_info.max_wm;
drm_dbg_kms(&dev_priv->drm,
"self-refresh watermark: display plane %d "
"cursor %d\n", srwm, cursor_sr);
cxsr_enabled = true;
} else {
cxsr_enabled = false;
/* Turn off self refresh if both pipes are enabled */
intel_set_memory_cxsr(dev_priv, false);
}
drm_dbg_kms(&dev_priv->drm,
"Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
srwm);
/* 965 has limitations... */
intel_uncore_write(&dev_priv->uncore, DSPFW1, FW_WM(srwm, SR) |
FW_WM(8, CURSORB) |
FW_WM(8, PLANEB) |
FW_WM(8, PLANEA));
intel_uncore_write(&dev_priv->uncore, DSPFW2, FW_WM(8, CURSORA) |
FW_WM(8, PLANEC_OLD));
/* update cursor SR watermark */
intel_uncore_write(&dev_priv->uncore, DSPFW3, FW_WM(cursor_sr, CURSOR_SR));
if (cxsr_enabled)
intel_set_memory_cxsr(dev_priv, true);
}
#undef FW_WM
static struct intel_crtc *intel_crtc_for_plane(struct drm_i915_private *i915,
enum i9xx_plane_id i9xx_plane)
{
struct intel_plane *plane;
for_each_intel_plane(&i915->drm, plane) {
if (plane->id == PLANE_PRIMARY &&
plane->i9xx_plane == i9xx_plane)
return intel_crtc_for_pipe(i915, plane->pipe);
}
return NULL;
}
static void i9xx_update_wm(struct drm_i915_private *dev_priv)
{
const struct intel_watermark_params *wm_info;
u32 fwater_lo;
u32 fwater_hi;
int cwm, srwm = 1;
int fifo_size;
int planea_wm, planeb_wm;
struct intel_crtc *crtc;
if (IS_I945GM(dev_priv))
wm_info = &i945_wm_info;
else if (DISPLAY_VER(dev_priv) != 2)
wm_info = &i915_wm_info;
else
wm_info = &i830_a_wm_info;
if (DISPLAY_VER(dev_priv) == 2)
fifo_size = i830_get_fifo_size(dev_priv, PLANE_A);
else
fifo_size = i9xx_get_fifo_size(dev_priv, PLANE_A);
crtc = intel_crtc_for_plane(dev_priv, PLANE_A);
if (intel_crtc_active(crtc)) {
const struct drm_framebuffer *fb =
crtc->base.primary->state->fb;
int cpp;
if (DISPLAY_VER(dev_priv) == 2)
cpp = 4;
else
cpp = fb->format->cpp[0];
planea_wm = intel_calculate_wm(crtc->config->pixel_rate,
wm_info, fifo_size, cpp,
pessimal_latency_ns);
} else {
planea_wm = fifo_size - wm_info->guard_size;
if (planea_wm > (long)wm_info->max_wm)
planea_wm = wm_info->max_wm;
}
if (DISPLAY_VER(dev_priv) == 2)
wm_info = &i830_bc_wm_info;
if (DISPLAY_VER(dev_priv) == 2)
fifo_size = i830_get_fifo_size(dev_priv, PLANE_B);
else
fifo_size = i9xx_get_fifo_size(dev_priv, PLANE_B);
crtc = intel_crtc_for_plane(dev_priv, PLANE_B);
if (intel_crtc_active(crtc)) {
const struct drm_framebuffer *fb =
crtc->base.primary->state->fb;
int cpp;
if (DISPLAY_VER(dev_priv) == 2)
cpp = 4;
else
cpp = fb->format->cpp[0];
planeb_wm = intel_calculate_wm(crtc->config->pixel_rate,
wm_info, fifo_size, cpp,
pessimal_latency_ns);
} else {
planeb_wm = fifo_size - wm_info->guard_size;
if (planeb_wm > (long)wm_info->max_wm)
planeb_wm = wm_info->max_wm;
}
drm_dbg_kms(&dev_priv->drm,
"FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
crtc = single_enabled_crtc(dev_priv);
if (IS_I915GM(dev_priv) && crtc) {
struct drm_i915_gem_object *obj;
obj = intel_fb_obj(crtc->base.primary->state->fb);
/* self-refresh seems busted with untiled */
if (!i915_gem_object_is_tiled(obj))
crtc = NULL;
}
/*
* Overlay gets an aggressive default since video jitter is bad.
*/
cwm = 2;
/* Play safe and disable self-refresh before adjusting watermarks. */
intel_set_memory_cxsr(dev_priv, false);
/* Calc sr entries for one plane configs */
if (HAS_FW_BLC(dev_priv) && crtc) {
/* self-refresh has much higher latency */
static const int sr_latency_ns = 6000;
const struct drm_display_mode *pipe_mode =
&crtc->config->hw.pipe_mode;
const struct drm_framebuffer *fb =
crtc->base.primary->state->fb;
int pixel_rate = crtc->config->pixel_rate;
int htotal = pipe_mode->crtc_htotal;
int width = drm_rect_width(&crtc->base.primary->state->src) >> 16;
int cpp;
int entries;
if (IS_I915GM(dev_priv) || IS_I945GM(dev_priv))
cpp = 4;
else
cpp = fb->format->cpp[0];
entries = intel_wm_method2(pixel_rate, htotal, width, cpp,
sr_latency_ns / 100);
entries = DIV_ROUND_UP(entries, wm_info->cacheline_size);
drm_dbg_kms(&dev_priv->drm,
"self-refresh entries: %d\n", entries);
srwm = wm_info->fifo_size - entries;
if (srwm < 0)
srwm = 1;
if (IS_I945G(dev_priv) || IS_I945GM(dev_priv))
intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF,
FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
else
intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF, srwm & 0x3f);
}
drm_dbg_kms(&dev_priv->drm,
"Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
planea_wm, planeb_wm, cwm, srwm);
fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
fwater_hi = (cwm & 0x1f);
/* Set request length to 8 cachelines per fetch */
fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
fwater_hi = fwater_hi | (1 << 8);
intel_uncore_write(&dev_priv->uncore, FW_BLC, fwater_lo);
intel_uncore_write(&dev_priv->uncore, FW_BLC2, fwater_hi);
if (crtc)
intel_set_memory_cxsr(dev_priv, true);
}
static void i845_update_wm(struct drm_i915_private *dev_priv)
{
struct intel_crtc *crtc;
u32 fwater_lo;
int planea_wm;
crtc = single_enabled_crtc(dev_priv);
if (crtc == NULL)
return;
planea_wm = intel_calculate_wm(crtc->config->pixel_rate,
&i845_wm_info,
i845_get_fifo_size(dev_priv, PLANE_A),
4, pessimal_latency_ns);
fwater_lo = intel_uncore_read(&dev_priv->uncore, FW_BLC) & ~0xfff;
fwater_lo |= (3<<8) | planea_wm;
drm_dbg_kms(&dev_priv->drm,
"Setting FIFO watermarks - A: %d\n", planea_wm);
intel_uncore_write(&dev_priv->uncore, FW_BLC, fwater_lo);
}
/* latency must be in 0.1us units. */
static unsigned int ilk_wm_method1(unsigned int pixel_rate,
unsigned int cpp,
unsigned int latency)
{
unsigned int ret;
ret = intel_wm_method1(pixel_rate, cpp, latency);
ret = DIV_ROUND_UP(ret, 64) + 2;
return ret;
}
/* latency must be in 0.1us units. */
static unsigned int ilk_wm_method2(unsigned int pixel_rate,
unsigned int htotal,
unsigned int width,
unsigned int cpp,
unsigned int latency)
{
unsigned int ret;
ret = intel_wm_method2(pixel_rate, htotal,
width, cpp, latency);
ret = DIV_ROUND_UP(ret, 64) + 2;
return ret;
}
static u32 ilk_wm_fbc(u32 pri_val, u32 horiz_pixels, u8 cpp)
{
/*
* Neither of these should be possible since this function shouldn't be
* called if the CRTC is off or the plane is invisible. But let's be
* extra paranoid to avoid a potential divide-by-zero if we screw up
* elsewhere in the driver.
*/
if (WARN_ON(!cpp))
return 0;
if (WARN_ON(!horiz_pixels))
return 0;
return DIV_ROUND_UP(pri_val * 64, horiz_pixels * cpp) + 2;
}
struct ilk_wm_maximums {
u16 pri;
u16 spr;
u16 cur;
u16 fbc;
};
/*
* For both WM_PIPE and WM_LP.
* mem_value must be in 0.1us units.
*/
static u32 ilk_compute_pri_wm(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
u32 mem_value, bool is_lp)
{
u32 method1, method2;
int cpp;
if (mem_value == 0)
return U32_MAX;
if (!intel_wm_plane_visible(crtc_state, plane_state))
return 0;
cpp = plane_state->hw.fb->format->cpp[0];
method1 = ilk_wm_method1(crtc_state->pixel_rate, cpp, mem_value);
if (!is_lp)
return method1;
method2 = ilk_wm_method2(crtc_state->pixel_rate,
crtc_state->hw.pipe_mode.crtc_htotal,
drm_rect_width(&plane_state->uapi.src) >> 16,
cpp, mem_value);
return min(method1, method2);
}
/*
* For both WM_PIPE and WM_LP.
* mem_value must be in 0.1us units.
*/
static u32 ilk_compute_spr_wm(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
u32 mem_value)
{
u32 method1, method2;
int cpp;
if (mem_value == 0)
return U32_MAX;
if (!intel_wm_plane_visible(crtc_state, plane_state))
return 0;
cpp = plane_state->hw.fb->format->cpp[0];
method1 = ilk_wm_method1(crtc_state->pixel_rate, cpp, mem_value);
method2 = ilk_wm_method2(crtc_state->pixel_rate,
crtc_state->hw.pipe_mode.crtc_htotal,
drm_rect_width(&plane_state->uapi.src) >> 16,
cpp, mem_value);
return min(method1, method2);
}
/*
* For both WM_PIPE and WM_LP.
* mem_value must be in 0.1us units.
*/
static u32 ilk_compute_cur_wm(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
u32 mem_value)
{
int cpp;
if (mem_value == 0)
return U32_MAX;
if (!intel_wm_plane_visible(crtc_state, plane_state))
return 0;
cpp = plane_state->hw.fb->format->cpp[0];
return ilk_wm_method2(crtc_state->pixel_rate,
crtc_state->hw.pipe_mode.crtc_htotal,
drm_rect_width(&plane_state->uapi.src) >> 16,
cpp, mem_value);
}
/* Only for WM_LP. */
static u32 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
u32 pri_val)
{
int cpp;
if (!intel_wm_plane_visible(crtc_state, plane_state))
return 0;
cpp = plane_state->hw.fb->format->cpp[0];
return ilk_wm_fbc(pri_val, drm_rect_width(&plane_state->uapi.src) >> 16,
cpp);
}
static unsigned int
ilk_display_fifo_size(const struct drm_i915_private *dev_priv)
{
if (DISPLAY_VER(dev_priv) >= 8)
return 3072;
else if (DISPLAY_VER(dev_priv) >= 7)
return 768;
else
return 512;
}
static unsigned int
ilk_plane_wm_reg_max(const struct drm_i915_private *dev_priv,
int level, bool is_sprite)
{
if (DISPLAY_VER(dev_priv) >= 8)
/* BDW primary/sprite plane watermarks */
return level == 0 ? 255 : 2047;
else if (DISPLAY_VER(dev_priv) >= 7)
/* IVB/HSW primary/sprite plane watermarks */
return level == 0 ? 127 : 1023;
else if (!is_sprite)
/* ILK/SNB primary plane watermarks */
return level == 0 ? 127 : 511;
else
/* ILK/SNB sprite plane watermarks */
return level == 0 ? 63 : 255;
}
static unsigned int
ilk_cursor_wm_reg_max(const struct drm_i915_private *dev_priv, int level)
{
if (DISPLAY_VER(dev_priv) >= 7)
return level == 0 ? 63 : 255;
else
return level == 0 ? 31 : 63;
}
static unsigned int ilk_fbc_wm_reg_max(const struct drm_i915_private *dev_priv)
{
if (DISPLAY_VER(dev_priv) >= 8)
return 31;
else
return 15;
}
/* Calculate the maximum primary/sprite plane watermark */
static unsigned int ilk_plane_wm_max(const struct drm_i915_private *dev_priv,
int level,
const struct intel_wm_config *config,
enum intel_ddb_partitioning ddb_partitioning,
bool is_sprite)
{
unsigned int fifo_size = ilk_display_fifo_size(dev_priv);
/* if sprites aren't enabled, sprites get nothing */
if (is_sprite && !config->sprites_enabled)
return 0;
/* HSW allows LP1+ watermarks even with multiple pipes */
if (level == 0 || config->num_pipes_active > 1) {
fifo_size /= INTEL_NUM_PIPES(dev_priv);
/*
* For some reason the non self refresh
* FIFO size is only half of the self
* refresh FIFO size on ILK/SNB.
*/
if (DISPLAY_VER(dev_priv) <= 6)
fifo_size /= 2;
}
if (config->sprites_enabled) {
/* level 0 is always calculated with 1:1 split */
if (level > 0 && ddb_partitioning == INTEL_DDB_PART_5_6) {
if (is_sprite)
fifo_size *= 5;
fifo_size /= 6;
} else {
fifo_size /= 2;
}
}
/* clamp to max that the registers can hold */
return min(fifo_size, ilk_plane_wm_reg_max(dev_priv, level, is_sprite));
}
/* Calculate the maximum cursor plane watermark */
static unsigned int ilk_cursor_wm_max(const struct drm_i915_private *dev_priv,
int level,
const struct intel_wm_config *config)
{
/* HSW LP1+ watermarks w/ multiple pipes */
if (level > 0 && config->num_pipes_active > 1)
return 64;
/* otherwise just report max that registers can hold */
return ilk_cursor_wm_reg_max(dev_priv, level);
}
static void ilk_compute_wm_maximums(const struct drm_i915_private *dev_priv,
int level,
const struct intel_wm_config *config,
enum intel_ddb_partitioning ddb_partitioning,
struct ilk_wm_maximums *max)
{
max->pri = ilk_plane_wm_max(dev_priv, level, config, ddb_partitioning, false);
max->spr = ilk_plane_wm_max(dev_priv, level, config, ddb_partitioning, true);
max->cur = ilk_cursor_wm_max(dev_priv, level, config);
max->fbc = ilk_fbc_wm_reg_max(dev_priv);
}
static void ilk_compute_wm_reg_maximums(const struct drm_i915_private *dev_priv,
int level,
struct ilk_wm_maximums *max)
{
max->pri = ilk_plane_wm_reg_max(dev_priv, level, false);
max->spr = ilk_plane_wm_reg_max(dev_priv, level, true);
max->cur = ilk_cursor_wm_reg_max(dev_priv, level);
max->fbc = ilk_fbc_wm_reg_max(dev_priv);
}
static bool ilk_validate_wm_level(int level,
const struct ilk_wm_maximums *max,
struct intel_wm_level *result)
{
bool ret;
/* already determined to be invalid? */
if (!result->enable)
return false;
result->enable = result->pri_val <= max->pri &&
result->spr_val <= max->spr &&
result->cur_val <= max->cur;
ret = result->enable;
/*
* HACK until we can pre-compute everything,
* and thus fail gracefully if LP0 watermarks
* are exceeded...
*/
if (level == 0 && !result->enable) {
if (result->pri_val > max->pri)
DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
level, result->pri_val, max->pri);
if (result->spr_val > max->spr)
DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
level, result->spr_val, max->spr);
if (result->cur_val > max->cur)
DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
level, result->cur_val, max->cur);
result->pri_val = min_t(u32, result->pri_val, max->pri);
result->spr_val = min_t(u32, result->spr_val, max->spr);
result->cur_val = min_t(u32, result->cur_val, max->cur);
result->enable = true;
}
return ret;
}
static void ilk_compute_wm_level(const struct drm_i915_private *dev_priv,
const struct intel_crtc *crtc,
int level,
struct intel_crtc_state *crtc_state,
const struct intel_plane_state *pristate,
const struct intel_plane_state *sprstate,
const struct intel_plane_state *curstate,
struct intel_wm_level *result)
{
u16 pri_latency = dev_priv->display.wm.pri_latency[level];
u16 spr_latency = dev_priv->display.wm.spr_latency[level];
u16 cur_latency = dev_priv->display.wm.cur_latency[level];
/* WM1+ latency values stored in 0.5us units */
if (level > 0) {
pri_latency *= 5;
spr_latency *= 5;
cur_latency *= 5;
}
if (pristate) {
result->pri_val = ilk_compute_pri_wm(crtc_state, pristate,
pri_latency, level);
result->fbc_val = ilk_compute_fbc_wm(crtc_state, pristate, result->pri_val);
}
if (sprstate)
result->spr_val = ilk_compute_spr_wm(crtc_state, sprstate, spr_latency);
if (curstate)
result->cur_val = ilk_compute_cur_wm(crtc_state, curstate, cur_latency);
result->enable = true;
}
static void hsw_read_wm_latency(struct drm_i915_private *i915, u16 wm[])
{
u64 sskpd;
i915->display.wm.num_levels = 5;
sskpd = intel_uncore_read64(&i915->uncore, MCH_SSKPD);
wm[0] = REG_FIELD_GET64(SSKPD_NEW_WM0_MASK_HSW, sskpd);
if (wm[0] == 0)
wm[0] = REG_FIELD_GET64(SSKPD_OLD_WM0_MASK_HSW, sskpd);
wm[1] = REG_FIELD_GET64(SSKPD_WM1_MASK_HSW, sskpd);
wm[2] = REG_FIELD_GET64(SSKPD_WM2_MASK_HSW, sskpd);
wm[3] = REG_FIELD_GET64(SSKPD_WM3_MASK_HSW, sskpd);
wm[4] = REG_FIELD_GET64(SSKPD_WM4_MASK_HSW, sskpd);
}
static void snb_read_wm_latency(struct drm_i915_private *i915, u16 wm[])
{
u32 sskpd;
i915->display.wm.num_levels = 4;
sskpd = intel_uncore_read(&i915->uncore, MCH_SSKPD);
wm[0] = REG_FIELD_GET(SSKPD_WM0_MASK_SNB, sskpd);
wm[1] = REG_FIELD_GET(SSKPD_WM1_MASK_SNB, sskpd);
wm[2] = REG_FIELD_GET(SSKPD_WM2_MASK_SNB, sskpd);
wm[3] = REG_FIELD_GET(SSKPD_WM3_MASK_SNB, sskpd);
}
static void ilk_read_wm_latency(struct drm_i915_private *i915, u16 wm[])
{
u32 mltr;
i915->display.wm.num_levels = 3;
mltr = intel_uncore_read(&i915->uncore, MLTR_ILK);
/* ILK primary LP0 latency is 700 ns */
wm[0] = 7;
wm[1] = REG_FIELD_GET(MLTR_WM1_MASK, mltr);
wm[2] = REG_FIELD_GET(MLTR_WM2_MASK, mltr);
}
static void intel_fixup_spr_wm_latency(struct drm_i915_private *dev_priv,
u16 wm[5])
{
/* ILK sprite LP0 latency is 1300 ns */
if (DISPLAY_VER(dev_priv) == 5)
wm[0] = 13;
}
static void intel_fixup_cur_wm_latency(struct drm_i915_private *dev_priv,
u16 wm[5])
{
/* ILK cursor LP0 latency is 1300 ns */
if (DISPLAY_VER(dev_priv) == 5)
wm[0] = 13;
}
static bool ilk_increase_wm_latency(struct drm_i915_private *dev_priv,
u16 wm[5], u16 min)
{
int level;
if (wm[0] >= min)
return false;
wm[0] = max(wm[0], min);
for (level = 1; level < dev_priv->display.wm.num_levels; level++)
wm[level] = max_t(u16, wm[level], DIV_ROUND_UP(min, 5));
return true;
}
static void snb_wm_latency_quirk(struct drm_i915_private *dev_priv)
{
bool changed;
/*
* The BIOS provided WM memory latency values are often
* inadequate for high resolution displays. Adjust them.
*/
changed = ilk_increase_wm_latency(dev_priv, dev_priv->display.wm.pri_latency, 12);
changed |= ilk_increase_wm_latency(dev_priv, dev_priv->display.wm.spr_latency, 12);
changed |= ilk_increase_wm_latency(dev_priv, dev_priv->display.wm.cur_latency, 12);
if (!changed)
return;
drm_dbg_kms(&dev_priv->drm,
"WM latency values increased to avoid potential underruns\n");
intel_print_wm_latency(dev_priv, "Primary", dev_priv->display.wm.pri_latency);
intel_print_wm_latency(dev_priv, "Sprite", dev_priv->display.wm.spr_latency);
intel_print_wm_latency(dev_priv, "Cursor", dev_priv->display.wm.cur_latency);
}
static void snb_wm_lp3_irq_quirk(struct drm_i915_private *dev_priv)
{
/*
* On some SNB machines (Thinkpad X220 Tablet at least)
* LP3 usage can cause vblank interrupts to be lost.
* The DEIIR bit will go high but it looks like the CPU
* never gets interrupted.
*
* It's not clear whether other interrupt source could
* be affected or if this is somehow limited to vblank
* interrupts only. To play it safe we disable LP3
* watermarks entirely.
*/
if (dev_priv->display.wm.pri_latency[3] == 0 &&
dev_priv->display.wm.spr_latency[3] == 0 &&
dev_priv->display.wm.cur_latency[3] == 0)
return;
dev_priv->display.wm.pri_latency[3] = 0;
dev_priv->display.wm.spr_latency[3] = 0;
dev_priv->display.wm.cur_latency[3] = 0;
drm_dbg_kms(&dev_priv->drm,
"LP3 watermarks disabled due to potential for lost interrupts\n");
intel_print_wm_latency(dev_priv, "Primary", dev_priv->display.wm.pri_latency);
intel_print_wm_latency(dev_priv, "Sprite", dev_priv->display.wm.spr_latency);
intel_print_wm_latency(dev_priv, "Cursor", dev_priv->display.wm.cur_latency);
}
static void ilk_setup_wm_latency(struct drm_i915_private *dev_priv)
{
if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
hsw_read_wm_latency(dev_priv, dev_priv->display.wm.pri_latency);
else if (DISPLAY_VER(dev_priv) >= 6)
snb_read_wm_latency(dev_priv, dev_priv->display.wm.pri_latency);
else
ilk_read_wm_latency(dev_priv, dev_priv->display.wm.pri_latency);
memcpy(dev_priv->display.wm.spr_latency, dev_priv->display.wm.pri_latency,
sizeof(dev_priv->display.wm.pri_latency));
memcpy(dev_priv->display.wm.cur_latency, dev_priv->display.wm.pri_latency,
sizeof(dev_priv->display.wm.pri_latency));
intel_fixup_spr_wm_latency(dev_priv, dev_priv->display.wm.spr_latency);
intel_fixup_cur_wm_latency(dev_priv, dev_priv->display.wm.cur_latency);
intel_print_wm_latency(dev_priv, "Primary", dev_priv->display.wm.pri_latency);
intel_print_wm_latency(dev_priv, "Sprite", dev_priv->display.wm.spr_latency);
intel_print_wm_latency(dev_priv, "Cursor", dev_priv->display.wm.cur_latency);
if (DISPLAY_VER(dev_priv) == 6) {
snb_wm_latency_quirk(dev_priv);
snb_wm_lp3_irq_quirk(dev_priv);
}
}
static bool ilk_validate_pipe_wm(const struct drm_i915_private *dev_priv,
struct intel_pipe_wm *pipe_wm)
{
/* LP0 watermark maximums depend on this pipe alone */
const struct intel_wm_config config = {
.num_pipes_active = 1,
.sprites_enabled = pipe_wm->sprites_enabled,
.sprites_scaled = pipe_wm->sprites_scaled,
};
struct ilk_wm_maximums max;
/* LP0 watermarks always use 1/2 DDB partitioning */
ilk_compute_wm_maximums(dev_priv, 0, &config, INTEL_DDB_PART_1_2, &max);
/* At least LP0 must be valid */
if (!ilk_validate_wm_level(0, &max, &pipe_wm->wm[0])) {
drm_dbg_kms(&dev_priv->drm, "LP0 watermark invalid\n");
return false;
}
return true;
}
/* Compute new watermarks for the pipe */
static int ilk_compute_pipe_wm(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(state->base.dev);
struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
struct intel_pipe_wm *pipe_wm;
struct intel_plane *plane;
const struct intel_plane_state *plane_state;
const struct intel_plane_state *pristate = NULL;
const struct intel_plane_state *sprstate = NULL;
const struct intel_plane_state *curstate = NULL;
struct ilk_wm_maximums max;
int level, usable_level;
pipe_wm = &crtc_state->wm.ilk.optimal;
intel_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) {
if (plane->base.type == DRM_PLANE_TYPE_PRIMARY)
pristate = plane_state;
else if (plane->base.type == DRM_PLANE_TYPE_OVERLAY)
sprstate = plane_state;
else if (plane->base.type == DRM_PLANE_TYPE_CURSOR)
curstate = plane_state;
}
pipe_wm->pipe_enabled = crtc_state->hw.active;
pipe_wm->sprites_enabled = crtc_state->active_planes & BIT(PLANE_SPRITE0);
pipe_wm->sprites_scaled = crtc_state->scaled_planes & BIT(PLANE_SPRITE0);
usable_level = dev_priv->display.wm.num_levels - 1;
/* ILK/SNB: LP2+ watermarks only w/o sprites */
if (DISPLAY_VER(dev_priv) <= 6 && pipe_wm->sprites_enabled)
usable_level = 1;
/* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */
if (pipe_wm->sprites_scaled)
usable_level = 0;
memset(&pipe_wm->wm, 0, sizeof(pipe_wm->wm));
ilk_compute_wm_level(dev_priv, crtc, 0, crtc_state,
pristate, sprstate, curstate, &pipe_wm->wm[0]);
if (!ilk_validate_pipe_wm(dev_priv, pipe_wm))
return -EINVAL;
ilk_compute_wm_reg_maximums(dev_priv, 1, &max);
for (level = 1; level <= usable_level; level++) {
struct intel_wm_level *wm = &pipe_wm->wm[level];
ilk_compute_wm_level(dev_priv, crtc, level, crtc_state,
pristate, sprstate, curstate, wm);
/*
* Disable any watermark level that exceeds the
* register maximums since such watermarks are
* always invalid.
*/
if (!ilk_validate_wm_level(level, &max, wm)) {
memset(wm, 0, sizeof(*wm));
break;
}
}
return 0;
}
/*
* Build a set of 'intermediate' watermark values that satisfy both the old
* state and the new state. These can be programmed to the hardware
* immediately.
*/
static int ilk_compute_intermediate_wm(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
struct intel_crtc_state *new_crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
const struct intel_crtc_state *old_crtc_state =
intel_atomic_get_old_crtc_state(state, crtc);
struct intel_pipe_wm *a = &new_crtc_state->wm.ilk.intermediate;
const struct intel_pipe_wm *b = &old_crtc_state->wm.ilk.optimal;
int level;
/*
* Start with the final, target watermarks, then combine with the
* currently active watermarks to get values that are safe both before
* and after the vblank.
*/
*a = new_crtc_state->wm.ilk.optimal;
if (!new_crtc_state->hw.active ||
intel_crtc_needs_modeset(new_crtc_state) ||
state->skip_intermediate_wm)
return 0;
a->pipe_enabled |= b->pipe_enabled;
a->sprites_enabled |= b->sprites_enabled;
a->sprites_scaled |= b->sprites_scaled;
for (level = 0; level < dev_priv->display.wm.num_levels; level++) {
struct intel_wm_level *a_wm = &a->wm[level];
const struct intel_wm_level *b_wm = &b->wm[level];
a_wm->enable &= b_wm->enable;
a_wm->pri_val = max(a_wm->pri_val, b_wm->pri_val);
a_wm->spr_val = max(a_wm->spr_val, b_wm->spr_val);
a_wm->cur_val = max(a_wm->cur_val, b_wm->cur_val);
a_wm->fbc_val = max(a_wm->fbc_val, b_wm->fbc_val);
}
/*
* We need to make sure that these merged watermark values are
* actually a valid configuration themselves. If they're not,
* there's no safe way to transition from the old state to
* the new state, so we need to fail the atomic transaction.
*/
if (!ilk_validate_pipe_wm(dev_priv, a))
return -EINVAL;
/*
* If our intermediate WM are identical to the final WM, then we can
* omit the post-vblank programming; only update if it's different.
*/
if (memcmp(a, &new_crtc_state->wm.ilk.optimal, sizeof(*a)) != 0)
new_crtc_state->wm.need_postvbl_update = true;
return 0;
}
/*
* Merge the watermarks from all active pipes for a specific level.
*/
static void ilk_merge_wm_level(struct drm_i915_private *dev_priv,
int level,
struct intel_wm_level *ret_wm)
{
const struct intel_crtc *crtc;
ret_wm->enable = true;
for_each_intel_crtc(&dev_priv->drm, crtc) {
const struct intel_pipe_wm *active = &crtc->wm.active.ilk;
const struct intel_wm_level *wm = &active->wm[level];
if (!active->pipe_enabled)
continue;
/*
* The watermark values may have been used in the past,
* so we must maintain them in the registers for some
* time even if the level is now disabled.
*/
if (!wm->enable)
ret_wm->enable = false;
ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val);
ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val);
ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val);
ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val);
}
}
/*
* Merge all low power watermarks for all active pipes.
*/
static void ilk_wm_merge(struct drm_i915_private *dev_priv,
const struct intel_wm_config *config,
const struct ilk_wm_maximums *max,
struct intel_pipe_wm *merged)
{
int level, num_levels = dev_priv->display.wm.num_levels;
int last_enabled_level = num_levels - 1;
/* ILK/SNB/IVB: LP1+ watermarks only w/ single pipe */
if ((DISPLAY_VER(dev_priv) <= 6 || IS_IVYBRIDGE(dev_priv)) &&
config->num_pipes_active > 1)
last_enabled_level = 0;
/* ILK: FBC WM must be disabled always */
merged->fbc_wm_enabled = DISPLAY_VER(dev_priv) >= 6;
/* merge each WM1+ level */
for (level = 1; level < num_levels; level++) {
struct intel_wm_level *wm = &merged->wm[level];
ilk_merge_wm_level(dev_priv, level, wm);
if (level > last_enabled_level)
wm->enable = false;
else if (!ilk_validate_wm_level(level, max, wm))
/* make sure all following levels get disabled */
last_enabled_level = level - 1;
/*
* The spec says it is preferred to disable
* FBC WMs instead of disabling a WM level.
*/
if (wm->fbc_val > max->fbc) {
if (wm->enable)
merged->fbc_wm_enabled = false;
wm->fbc_val = 0;
}
}
/* ILK: LP2+ must be disabled when FBC WM is disabled but FBC enabled */
if (DISPLAY_VER(dev_priv) == 5 && HAS_FBC(dev_priv) &&
dev_priv->params.enable_fbc && !merged->fbc_wm_enabled) {
for (level = 2; level < num_levels; level++) {
struct intel_wm_level *wm = &merged->wm[level];
wm->enable = false;
}
}
}
static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm)
{
/* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable);
}
/* The value we need to program into the WM_LPx latency field */
static unsigned int ilk_wm_lp_latency(struct drm_i915_private *dev_priv,
int level)
{
if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
return 2 * level;
else
return dev_priv->display.wm.pri_latency[level];
}
static void ilk_compute_wm_results(struct drm_i915_private *dev_priv,
const struct intel_pipe_wm *merged,
enum intel_ddb_partitioning partitioning,
struct ilk_wm_values *results)
{
struct intel_crtc *crtc;
int level, wm_lp;
results->enable_fbc_wm = merged->fbc_wm_enabled;
results->partitioning = partitioning;
/* LP1+ register values */
for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
const struct intel_wm_level *r;
level = ilk_wm_lp_to_level(wm_lp, merged);
r = &merged->wm[level];
/*
* Maintain the watermark values even if the level is
* disabled. Doing otherwise could cause underruns.
*/
results->wm_lp[wm_lp - 1] =
WM_LP_LATENCY(ilk_wm_lp_latency(dev_priv, level)) |
WM_LP_PRIMARY(r->pri_val) |
WM_LP_CURSOR(r->cur_val);
if (r->enable)
results->wm_lp[wm_lp - 1] |= WM_LP_ENABLE;
if (DISPLAY_VER(dev_priv) >= 8)
results->wm_lp[wm_lp - 1] |= WM_LP_FBC_BDW(r->fbc_val);
else
results->wm_lp[wm_lp - 1] |= WM_LP_FBC_ILK(r->fbc_val);
results->wm_lp_spr[wm_lp - 1] = WM_LP_SPRITE(r->spr_val);
/*
* Always set WM_LP_SPRITE_EN when spr_val != 0, even if the
* level is disabled. Doing otherwise could cause underruns.
*/
if (DISPLAY_VER(dev_priv) <= 6 && r->spr_val) {
drm_WARN_ON(&dev_priv->drm, wm_lp != 1);
results->wm_lp_spr[wm_lp - 1] |= WM_LP_SPRITE_ENABLE;
}
}
/* LP0 register values */
for_each_intel_crtc(&dev_priv->drm, crtc) {
enum pipe pipe = crtc->pipe;
const struct intel_pipe_wm *pipe_wm = &crtc->wm.active.ilk;
const struct intel_wm_level *r = &pipe_wm->wm[0];
if (drm_WARN_ON(&dev_priv->drm, !r->enable))
continue;
results->wm_pipe[pipe] =
WM0_PIPE_PRIMARY(r->pri_val) |
WM0_PIPE_SPRITE(r->spr_val) |
WM0_PIPE_CURSOR(r->cur_val);
}
}
/*
* Find the result with the highest level enabled. Check for enable_fbc_wm in
* case both are at the same level. Prefer r1 in case they're the same.
*/
static struct intel_pipe_wm *
ilk_find_best_result(struct drm_i915_private *dev_priv,
struct intel_pipe_wm *r1,
struct intel_pipe_wm *r2)
{
int level, level1 = 0, level2 = 0;
for (level = 1; level < dev_priv->display.wm.num_levels; level++) {
if (r1->wm[level].enable)
level1 = level;
if (r2->wm[level].enable)
level2 = level;
}
if (level1 == level2) {
if (r2->fbc_wm_enabled && !r1->fbc_wm_enabled)
return r2;
else
return r1;
} else if (level1 > level2) {
return r1;
} else {
return r2;
}
}
/* dirty bits used to track which watermarks need changes */
#define WM_DIRTY_PIPE(pipe) (1 << (pipe))
#define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
#define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
#define WM_DIRTY_FBC (1 << 24)
#define WM_DIRTY_DDB (1 << 25)
static unsigned int ilk_compute_wm_dirty(struct drm_i915_private *dev_priv,
const struct ilk_wm_values *old,
const struct ilk_wm_values *new)
{
unsigned int dirty = 0;
enum pipe pipe;
int wm_lp;
for_each_pipe(dev_priv, pipe) {
if (old->wm_pipe[pipe] != new->wm_pipe[pipe]) {
dirty |= WM_DIRTY_PIPE(pipe);
/* Must disable LP1+ watermarks too */
dirty |= WM_DIRTY_LP_ALL;
}
}
if (old->enable_fbc_wm != new->enable_fbc_wm) {
dirty |= WM_DIRTY_FBC;
/* Must disable LP1+ watermarks too */
dirty |= WM_DIRTY_LP_ALL;
}
if (old->partitioning != new->partitioning) {
dirty |= WM_DIRTY_DDB;
/* Must disable LP1+ watermarks too */
dirty |= WM_DIRTY_LP_ALL;
}
/* LP1+ watermarks already deemed dirty, no need to continue */
if (dirty & WM_DIRTY_LP_ALL)
return dirty;
/* Find the lowest numbered LP1+ watermark in need of an update... */
for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
if (old->wm_lp[wm_lp - 1] != new->wm_lp[wm_lp - 1] ||
old->wm_lp_spr[wm_lp - 1] != new->wm_lp_spr[wm_lp - 1])
break;
}
/* ...and mark it and all higher numbered LP1+ watermarks as dirty */
for (; wm_lp <= 3; wm_lp++)
dirty |= WM_DIRTY_LP(wm_lp);
return dirty;
}
static bool _ilk_disable_lp_wm(struct drm_i915_private *dev_priv,
unsigned int dirty)
{
struct ilk_wm_values *previous = &dev_priv->display.wm.hw;
bool changed = false;
if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] & WM_LP_ENABLE) {
previous->wm_lp[2] &= ~WM_LP_ENABLE;
intel_uncore_write(&dev_priv->uncore, WM3_LP_ILK, previous->wm_lp[2]);
changed = true;
}
if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] & WM_LP_ENABLE) {
previous->wm_lp[1] &= ~WM_LP_ENABLE;
intel_uncore_write(&dev_priv->uncore, WM2_LP_ILK, previous->wm_lp[1]);
changed = true;
}
if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] & WM_LP_ENABLE) {
previous->wm_lp[0] &= ~WM_LP_ENABLE;
intel_uncore_write(&dev_priv->uncore, WM1_LP_ILK, previous->wm_lp[0]);
changed = true;
}
/*
* Don't touch WM_LP_SPRITE_ENABLE here.
* Doing so could cause underruns.
*/
return changed;
}
/*
* The spec says we shouldn't write when we don't need, because every write
* causes WMs to be re-evaluated, expending some power.
*/
static void ilk_write_wm_values(struct drm_i915_private *dev_priv,
struct ilk_wm_values *results)
{
struct ilk_wm_values *previous = &dev_priv->display.wm.hw;
unsigned int dirty;
dirty = ilk_compute_wm_dirty(dev_priv, previous, results);
if (!dirty)
return;
_ilk_disable_lp_wm(dev_priv, dirty);
if (dirty & WM_DIRTY_PIPE(PIPE_A))
intel_uncore_write(&dev_priv->uncore, WM0_PIPE_ILK(PIPE_A), results->wm_pipe[0]);
if (dirty & WM_DIRTY_PIPE(PIPE_B))
intel_uncore_write(&dev_priv->uncore, WM0_PIPE_ILK(PIPE_B), results->wm_pipe[1]);
if (dirty & WM_DIRTY_PIPE(PIPE_C))
intel_uncore_write(&dev_priv->uncore, WM0_PIPE_ILK(PIPE_C), results->wm_pipe[2]);
if (dirty & WM_DIRTY_DDB) {
if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
intel_uncore_rmw(&dev_priv->uncore, WM_MISC, WM_MISC_DATA_PARTITION_5_6,
results->partitioning == INTEL_DDB_PART_1_2 ? 0 :
WM_MISC_DATA_PARTITION_5_6);
else
intel_uncore_rmw(&dev_priv->uncore, DISP_ARB_CTL2, DISP_DATA_PARTITION_5_6,
results->partitioning == INTEL_DDB_PART_1_2 ? 0 :
DISP_DATA_PARTITION_5_6);
}
if (dirty & WM_DIRTY_FBC)
intel_uncore_rmw(&dev_priv->uncore, DISP_ARB_CTL, DISP_FBC_WM_DIS,
results->enable_fbc_wm ? 0 : DISP_FBC_WM_DIS);
if (dirty & WM_DIRTY_LP(1) &&
previous->wm_lp_spr[0] != results->wm_lp_spr[0])
intel_uncore_write(&dev_priv->uncore, WM1S_LP_ILK, results->wm_lp_spr[0]);
if (DISPLAY_VER(dev_priv) >= 7) {
if (dirty & WM_DIRTY_LP(2) && previous->wm_lp_spr[1] != results->wm_lp_spr[1])
intel_uncore_write(&dev_priv->uncore, WM2S_LP_IVB, results->wm_lp_spr[1]);
if (dirty & WM_DIRTY_LP(3) && previous->wm_lp_spr[2] != results->wm_lp_spr[2])
intel_uncore_write(&dev_priv->uncore, WM3S_LP_IVB, results->wm_lp_spr[2]);
}
if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] != results->wm_lp[0])
intel_uncore_write(&dev_priv->uncore, WM1_LP_ILK, results->wm_lp[0]);
if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] != results->wm_lp[1])
intel_uncore_write(&dev_priv->uncore, WM2_LP_ILK, results->wm_lp[1]);
if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] != results->wm_lp[2])
intel_uncore_write(&dev_priv->uncore, WM3_LP_ILK, results->wm_lp[2]);
dev_priv->display.wm.hw = *results;
}
bool ilk_disable_lp_wm(struct drm_i915_private *dev_priv)
{
return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
}
static void ilk_compute_wm_config(struct drm_i915_private *dev_priv,
struct intel_wm_config *config)
{
struct intel_crtc *crtc;
/* Compute the currently _active_ config */
for_each_intel_crtc(&dev_priv->drm, crtc) {
const struct intel_pipe_wm *wm = &crtc->wm.active.ilk;
if (!wm->pipe_enabled)
continue;
config->sprites_enabled |= wm->sprites_enabled;
config->sprites_scaled |= wm->sprites_scaled;
config->num_pipes_active++;
}
}
static void ilk_program_watermarks(struct drm_i915_private *dev_priv)
{
struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
struct ilk_wm_maximums max;
struct intel_wm_config config = {};
struct ilk_wm_values results = {};
enum intel_ddb_partitioning partitioning;
ilk_compute_wm_config(dev_priv, &config);
ilk_compute_wm_maximums(dev_priv, 1, &config, INTEL_DDB_PART_1_2, &max);
ilk_wm_merge(dev_priv, &config, &max, &lp_wm_1_2);
/* 5/6 split only in single pipe config on IVB+ */
if (DISPLAY_VER(dev_priv) >= 7 &&
config.num_pipes_active == 1 && config.sprites_enabled) {
ilk_compute_wm_maximums(dev_priv, 1, &config, INTEL_DDB_PART_5_6, &max);
ilk_wm_merge(dev_priv, &config, &max, &lp_wm_5_6);
best_lp_wm = ilk_find_best_result(dev_priv, &lp_wm_1_2, &lp_wm_5_6);
} else {
best_lp_wm = &lp_wm_1_2;
}
partitioning = (best_lp_wm == &lp_wm_1_2) ?
INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6;
ilk_compute_wm_results(dev_priv, best_lp_wm, partitioning, &results);
ilk_write_wm_values(dev_priv, &results);
}
static void ilk_initial_watermarks(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
mutex_lock(&dev_priv->display.wm.wm_mutex);
crtc->wm.active.ilk = crtc_state->wm.ilk.intermediate;
ilk_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
static void ilk_optimize_watermarks(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct intel_crtc_state *crtc_state =
intel_atomic_get_new_crtc_state(state, crtc);
if (!crtc_state->wm.need_postvbl_update)
return;
mutex_lock(&dev_priv->display.wm.wm_mutex);
crtc->wm.active.ilk = crtc_state->wm.ilk.optimal;
ilk_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
static void ilk_pipe_wm_get_hw_state(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct ilk_wm_values *hw = &dev_priv->display.wm.hw;
struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state);
struct intel_pipe_wm *active = &crtc_state->wm.ilk.optimal;
enum pipe pipe = crtc->pipe;
hw->wm_pipe[pipe] = intel_uncore_read(&dev_priv->uncore, WM0_PIPE_ILK(pipe));
memset(active, 0, sizeof(*active));
active->pipe_enabled = crtc->active;
if (active->pipe_enabled) {
u32 tmp = hw->wm_pipe[pipe];
/*
* For active pipes LP0 watermark is marked as
* enabled, and LP1+ watermaks as disabled since
* we can't really reverse compute them in case
* multiple pipes are active.
*/
active->wm[0].enable = true;
active->wm[0].pri_val = REG_FIELD_GET(WM0_PIPE_PRIMARY_MASK, tmp);
active->wm[0].spr_val = REG_FIELD_GET(WM0_PIPE_SPRITE_MASK, tmp);
active->wm[0].cur_val = REG_FIELD_GET(WM0_PIPE_CURSOR_MASK, tmp);
} else {
int level;
/*
* For inactive pipes, all watermark levels
* should be marked as enabled but zeroed,
* which is what we'd compute them to.
*/
for (level = 0; level < dev_priv->display.wm.num_levels; level++)
active->wm[level].enable = true;
}
crtc->wm.active.ilk = *active;
}
static int ilk_sanitize_watermarks_add_affected(struct drm_atomic_state *state)
{
struct drm_plane *plane;
struct intel_crtc *crtc;
for_each_intel_crtc(state->dev, crtc) {
struct intel_crtc_state *crtc_state;
crtc_state = intel_atomic_get_crtc_state(state, crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
if (crtc_state->hw.active) {
/*
* Preserve the inherited flag to avoid
* taking the full modeset path.
*/
crtc_state->inherited = true;
}
}
drm_for_each_plane(plane, state->dev) {
struct drm_plane_state *plane_state;
plane_state = drm_atomic_get_plane_state(state, plane);
if (IS_ERR(plane_state))
return PTR_ERR(plane_state);
}
return 0;
}
/*
* Calculate what we think the watermarks should be for the state we've read
* out of the hardware and then immediately program those watermarks so that
* we ensure the hardware settings match our internal state.
*
* We can calculate what we think WM's should be by creating a duplicate of the
* current state (which was constructed during hardware readout) and running it
* through the atomic check code to calculate new watermark values in the
* state object.
*/
void ilk_wm_sanitize(struct drm_i915_private *dev_priv)
{
struct drm_atomic_state *state;
struct intel_atomic_state *intel_state;
struct intel_crtc *crtc;
struct intel_crtc_state *crtc_state;
struct drm_modeset_acquire_ctx ctx;
int ret;
int i;
/* Only supported on platforms that use atomic watermark design */
if (!dev_priv->display.funcs.wm->optimize_watermarks)
return;
if (drm_WARN_ON(&dev_priv->drm, DISPLAY_VER(dev_priv) >= 9))
return;
state = drm_atomic_state_alloc(&dev_priv->drm);
if (drm_WARN_ON(&dev_priv->drm, !state))
return;
intel_state = to_intel_atomic_state(state);
drm_modeset_acquire_init(&ctx, 0);
state->acquire_ctx = &ctx;
to_intel_atomic_state(state)->internal = true;
retry:
/*
* Hardware readout is the only time we don't want to calculate
* intermediate watermarks (since we don't trust the current
* watermarks).
*/
if (!HAS_GMCH(dev_priv))
intel_state->skip_intermediate_wm = true;
ret = ilk_sanitize_watermarks_add_affected(state);
if (ret)
goto fail;
ret = intel_atomic_check(&dev_priv->drm, state);
if (ret)
goto fail;
/* Write calculated watermark values back */
for_each_new_intel_crtc_in_state(intel_state, crtc, crtc_state, i) {
crtc_state->wm.need_postvbl_update = true;
intel_optimize_watermarks(intel_state, crtc);
to_intel_crtc_state(crtc->base.state)->wm = crtc_state->wm;
}
fail:
if (ret == -EDEADLK) {
drm_atomic_state_clear(state);
drm_modeset_backoff(&ctx);
goto retry;
}
/*
* If we fail here, it means that the hardware appears to be
* programmed in a way that shouldn't be possible, given our
* understanding of watermark requirements. This might mean a
* mistake in the hardware readout code or a mistake in the
* watermark calculations for a given platform. Raise a WARN
* so that this is noticeable.
*
* If this actually happens, we'll have to just leave the
* BIOS-programmed watermarks untouched and hope for the best.
*/
drm_WARN(&dev_priv->drm, ret,
"Could not determine valid watermarks for inherited state\n");
drm_atomic_state_put(state);
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
}
#define _FW_WM(value, plane) \
(((value) & DSPFW_ ## plane ## _MASK) >> DSPFW_ ## plane ## _SHIFT)
#define _FW_WM_VLV(value, plane) \
(((value) & DSPFW_ ## plane ## _MASK_VLV) >> DSPFW_ ## plane ## _SHIFT)
static void g4x_read_wm_values(struct drm_i915_private *dev_priv,
struct g4x_wm_values *wm)
{
u32 tmp;
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW1);
wm->sr.plane = _FW_WM(tmp, SR);
wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB);
wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM(tmp, PLANEB);
wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM(tmp, PLANEA);
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW2);
wm->fbc_en = tmp & DSPFW_FBC_SR_EN;
wm->sr.fbc = _FW_WM(tmp, FBC_SR);
wm->hpll.fbc = _FW_WM(tmp, FBC_HPLL_SR);
wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM(tmp, SPRITEB);
wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA);
wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM(tmp, SPRITEA);
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW3);
wm->hpll_en = tmp & DSPFW_HPLL_SR_EN;
wm->sr.cursor = _FW_WM(tmp, CURSOR_SR);
wm->hpll.cursor = _FW_WM(tmp, HPLL_CURSOR);
wm->hpll.plane = _FW_WM(tmp, HPLL_SR);
}
static void vlv_read_wm_values(struct drm_i915_private *dev_priv,
struct vlv_wm_values *wm)
{
enum pipe pipe;
u32 tmp;
for_each_pipe(dev_priv, pipe) {
tmp = intel_uncore_read(&dev_priv->uncore, VLV_DDL(pipe));
wm->ddl[pipe].plane[PLANE_PRIMARY] =
(tmp >> DDL_PLANE_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
wm->ddl[pipe].plane[PLANE_CURSOR] =
(tmp >> DDL_CURSOR_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
wm->ddl[pipe].plane[PLANE_SPRITE0] =
(tmp >> DDL_SPRITE_SHIFT(0)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
wm->ddl[pipe].plane[PLANE_SPRITE1] =
(tmp >> DDL_SPRITE_SHIFT(1)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
}
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW1);
wm->sr.plane = _FW_WM(tmp, SR);
wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB);
wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEB);
wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEA);
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW2);
wm->pipe[PIPE_A].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEB);
wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA);
wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEA);
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW3);
wm->sr.cursor = _FW_WM(tmp, CURSOR_SR);
if (IS_CHERRYVIEW(dev_priv)) {
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW7_CHV);
wm->pipe[PIPE_B].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITED);
wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEC);
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW8_CHV);
wm->pipe[PIPE_C].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEF);
wm->pipe[PIPE_C].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEE);
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW9_CHV);
wm->pipe[PIPE_C].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEC);
wm->pipe[PIPE_C].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORC);
tmp = intel_uncore_read(&dev_priv->uncore, DSPHOWM);
wm->sr.plane |= _FW_WM(tmp, SR_HI) << 9;
wm->pipe[PIPE_C].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEF_HI) << 8;
wm->pipe[PIPE_C].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEE_HI) << 8;
wm->pipe[PIPE_C].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEC_HI) << 8;
wm->pipe[PIPE_B].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITED_HI) << 8;
wm->pipe[PIPE_B].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEC_HI) << 8;
wm->pipe[PIPE_B].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEB_HI) << 8;
wm->pipe[PIPE_A].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEB_HI) << 8;
wm->pipe[PIPE_A].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEA_HI) << 8;
wm->pipe[PIPE_A].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEA_HI) << 8;
} else {
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW7);
wm->pipe[PIPE_B].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITED);
wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEC);
tmp = intel_uncore_read(&dev_priv->uncore, DSPHOWM);
wm->sr.plane |= _FW_WM(tmp, SR_HI) << 9;
wm->pipe[PIPE_B].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITED_HI) << 8;
wm->pipe[PIPE_B].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEC_HI) << 8;
wm->pipe[PIPE_B].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEB_HI) << 8;
wm->pipe[PIPE_A].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEB_HI) << 8;
wm->pipe[PIPE_A].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEA_HI) << 8;
wm->pipe[PIPE_A].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEA_HI) << 8;
}
}
#undef _FW_WM
#undef _FW_WM_VLV
static void g4x_wm_get_hw_state(struct drm_i915_private *dev_priv)
{
struct g4x_wm_values *wm = &dev_priv->display.wm.g4x;
struct intel_crtc *crtc;
g4x_read_wm_values(dev_priv, wm);
wm->cxsr = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF) & FW_BLC_SELF_EN;
for_each_intel_crtc(&dev_priv->drm, crtc) {
struct intel_crtc_state *crtc_state =
to_intel_crtc_state(crtc->base.state);
struct g4x_wm_state *active = &crtc->wm.active.g4x;
struct g4x_pipe_wm *raw;
enum pipe pipe = crtc->pipe;
enum plane_id plane_id;
int level, max_level;
active->cxsr = wm->cxsr;
active->hpll_en = wm->hpll_en;
active->fbc_en = wm->fbc_en;
active->sr = wm->sr;
active->hpll = wm->hpll;
for_each_plane_id_on_crtc(crtc, plane_id) {
active->wm.plane[plane_id] =
wm->pipe[pipe].plane[plane_id];
}
if (wm->cxsr && wm->hpll_en)
max_level = G4X_WM_LEVEL_HPLL;
else if (wm->cxsr)
max_level = G4X_WM_LEVEL_SR;
else
max_level = G4X_WM_LEVEL_NORMAL;
level = G4X_WM_LEVEL_NORMAL;
raw = &crtc_state->wm.g4x.raw[level];
for_each_plane_id_on_crtc(crtc, plane_id)
raw->plane[plane_id] = active->wm.plane[plane_id];
level = G4X_WM_LEVEL_SR;
if (level > max_level)
goto out;
raw = &crtc_state->wm.g4x.raw[level];
raw->plane[PLANE_PRIMARY] = active->sr.plane;
raw->plane[PLANE_CURSOR] = active->sr.cursor;
raw->plane[PLANE_SPRITE0] = 0;
raw->fbc = active->sr.fbc;
level = G4X_WM_LEVEL_HPLL;
if (level > max_level)
goto out;
raw = &crtc_state->wm.g4x.raw[level];
raw->plane[PLANE_PRIMARY] = active->hpll.plane;
raw->plane[PLANE_CURSOR] = active->hpll.cursor;
raw->plane[PLANE_SPRITE0] = 0;
raw->fbc = active->hpll.fbc;
level++;
out:
for_each_plane_id_on_crtc(crtc, plane_id)
g4x_raw_plane_wm_set(crtc_state, level,
plane_id, USHRT_MAX);
g4x_raw_fbc_wm_set(crtc_state, level, USHRT_MAX);
g4x_invalidate_wms(crtc, active, level);
crtc_state->wm.g4x.optimal = *active;
crtc_state->wm.g4x.intermediate = *active;
drm_dbg_kms(&dev_priv->drm,
"Initial watermarks: pipe %c, plane=%d, cursor=%d, sprite=%d\n",
pipe_name(pipe),
wm->pipe[pipe].plane[PLANE_PRIMARY],
wm->pipe[pipe].plane[PLANE_CURSOR],
wm->pipe[pipe].plane[PLANE_SPRITE0]);
}
drm_dbg_kms(&dev_priv->drm,
"Initial SR watermarks: plane=%d, cursor=%d fbc=%d\n",
wm->sr.plane, wm->sr.cursor, wm->sr.fbc);
drm_dbg_kms(&dev_priv->drm,
"Initial HPLL watermarks: plane=%d, SR cursor=%d fbc=%d\n",
wm->hpll.plane, wm->hpll.cursor, wm->hpll.fbc);
drm_dbg_kms(&dev_priv->drm, "Initial SR=%s HPLL=%s FBC=%s\n",
str_yes_no(wm->cxsr), str_yes_no(wm->hpll_en),
str_yes_no(wm->fbc_en));
}
static void g4x_wm_sanitize(struct drm_i915_private *dev_priv)
{
struct intel_plane *plane;
struct intel_crtc *crtc;
mutex_lock(&dev_priv->display.wm.wm_mutex);
for_each_intel_plane(&dev_priv->drm, plane) {
struct intel_crtc *crtc =
intel_crtc_for_pipe(dev_priv, plane->pipe);
struct intel_crtc_state *crtc_state =
to_intel_crtc_state(crtc->base.state);
struct intel_plane_state *plane_state =
to_intel_plane_state(plane->base.state);
enum plane_id plane_id = plane->id;
int level;
if (plane_state->uapi.visible)
continue;
for (level = 0; level < dev_priv->display.wm.num_levels; level++) {
struct g4x_pipe_wm *raw =
&crtc_state->wm.g4x.raw[level];
raw->plane[plane_id] = 0;
if (plane_id == PLANE_PRIMARY)
raw->fbc = 0;
}
}
for_each_intel_crtc(&dev_priv->drm, crtc) {
struct intel_crtc_state *crtc_state =
to_intel_crtc_state(crtc->base.state);
int ret;
ret = _g4x_compute_pipe_wm(crtc_state);
drm_WARN_ON(&dev_priv->drm, ret);
crtc_state->wm.g4x.intermediate =
crtc_state->wm.g4x.optimal;
crtc->wm.active.g4x = crtc_state->wm.g4x.optimal;
}
g4x_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
static void g4x_wm_get_hw_state_and_sanitize(struct drm_i915_private *i915)
{
g4x_wm_get_hw_state(i915);
g4x_wm_sanitize(i915);
}
static void vlv_wm_get_hw_state(struct drm_i915_private *dev_priv)
{
struct vlv_wm_values *wm = &dev_priv->display.wm.vlv;
struct intel_crtc *crtc;
u32 val;
vlv_read_wm_values(dev_priv, wm);
wm->cxsr = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF_VLV) & FW_CSPWRDWNEN;
wm->level = VLV_WM_LEVEL_PM2;
if (IS_CHERRYVIEW(dev_priv)) {
vlv_punit_get(dev_priv);
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM);
if (val & DSP_MAXFIFO_PM5_ENABLE)
wm->level = VLV_WM_LEVEL_PM5;
/*
* If DDR DVFS is disabled in the BIOS, Punit
* will never ack the request. So if that happens
* assume we don't have to enable/disable DDR DVFS
* dynamically. To test that just set the REQ_ACK
* bit to poke the Punit, but don't change the
* HIGH/LOW bits so that we don't actually change
* the current state.
*/
val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2);
val |= FORCE_DDR_FREQ_REQ_ACK;
vlv_punit_write(dev_priv, PUNIT_REG_DDR_SETUP2, val);
if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2) &
FORCE_DDR_FREQ_REQ_ACK) == 0, 3)) {
drm_dbg_kms(&dev_priv->drm,
"Punit not acking DDR DVFS request, "
"assuming DDR DVFS is disabled\n");
dev_priv->display.wm.num_levels = VLV_WM_LEVEL_PM5 + 1;
} else {
val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2);
if ((val & FORCE_DDR_HIGH_FREQ) == 0)
wm->level = VLV_WM_LEVEL_DDR_DVFS;
}
vlv_punit_put(dev_priv);
}
for_each_intel_crtc(&dev_priv->drm, crtc) {
struct intel_crtc_state *crtc_state =
to_intel_crtc_state(crtc->base.state);
struct vlv_wm_state *active = &crtc->wm.active.vlv;
const struct vlv_fifo_state *fifo_state =
&crtc_state->wm.vlv.fifo_state;
enum pipe pipe = crtc->pipe;
enum plane_id plane_id;
int level;
vlv_get_fifo_size(crtc_state);
active->num_levels = wm->level + 1;
active->cxsr = wm->cxsr;
for (level = 0; level < active->num_levels; level++) {
struct g4x_pipe_wm *raw =
&crtc_state->wm.vlv.raw[level];
active->sr[level].plane = wm->sr.plane;
active->sr[level].cursor = wm->sr.cursor;
for_each_plane_id_on_crtc(crtc, plane_id) {
active->wm[level].plane[plane_id] =
wm->pipe[pipe].plane[plane_id];
raw->plane[plane_id] =
vlv_invert_wm_value(active->wm[level].plane[plane_id],
fifo_state->plane[plane_id]);
}
}
for_each_plane_id_on_crtc(crtc, plane_id)
vlv_raw_plane_wm_set(crtc_state, level,
plane_id, USHRT_MAX);
vlv_invalidate_wms(crtc, active, level);
crtc_state->wm.vlv.optimal = *active;
crtc_state->wm.vlv.intermediate = *active;
drm_dbg_kms(&dev_priv->drm,
"Initial watermarks: pipe %c, plane=%d, cursor=%d, sprite0=%d, sprite1=%d\n",
pipe_name(pipe),
wm->pipe[pipe].plane[PLANE_PRIMARY],
wm->pipe[pipe].plane[PLANE_CURSOR],
wm->pipe[pipe].plane[PLANE_SPRITE0],
wm->pipe[pipe].plane[PLANE_SPRITE1]);
}
drm_dbg_kms(&dev_priv->drm,
"Initial watermarks: SR plane=%d, SR cursor=%d level=%d cxsr=%d\n",
wm->sr.plane, wm->sr.cursor, wm->level, wm->cxsr);
}
static void vlv_wm_sanitize(struct drm_i915_private *dev_priv)
{
struct intel_plane *plane;
struct intel_crtc *crtc;
mutex_lock(&dev_priv->display.wm.wm_mutex);
for_each_intel_plane(&dev_priv->drm, plane) {
struct intel_crtc *crtc =
intel_crtc_for_pipe(dev_priv, plane->pipe);
struct intel_crtc_state *crtc_state =
to_intel_crtc_state(crtc->base.state);
struct intel_plane_state *plane_state =
to_intel_plane_state(plane->base.state);
enum plane_id plane_id = plane->id;
int level;
if (plane_state->uapi.visible)
continue;
for (level = 0; level < dev_priv->display.wm.num_levels; level++) {
struct g4x_pipe_wm *raw =
&crtc_state->wm.vlv.raw[level];
raw->plane[plane_id] = 0;
}
}
for_each_intel_crtc(&dev_priv->drm, crtc) {
struct intel_crtc_state *crtc_state =
to_intel_crtc_state(crtc->base.state);
int ret;
ret = _vlv_compute_pipe_wm(crtc_state);
drm_WARN_ON(&dev_priv->drm, ret);
crtc_state->wm.vlv.intermediate =
crtc_state->wm.vlv.optimal;
crtc->wm.active.vlv = crtc_state->wm.vlv.optimal;
}
vlv_program_watermarks(dev_priv);
mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
static void vlv_wm_get_hw_state_and_sanitize(struct drm_i915_private *i915)
{
vlv_wm_get_hw_state(i915);
vlv_wm_sanitize(i915);
}
/*
* FIXME should probably kill this and improve
* the real watermark readout/sanitation instead
*/
static void ilk_init_lp_watermarks(struct drm_i915_private *dev_priv)
{
intel_uncore_rmw(&dev_priv->uncore, WM3_LP_ILK, WM_LP_ENABLE, 0);
intel_uncore_rmw(&dev_priv->uncore, WM2_LP_ILK, WM_LP_ENABLE, 0);
intel_uncore_rmw(&dev_priv->uncore, WM1_LP_ILK, WM_LP_ENABLE, 0);
/*
* Don't touch WM_LP_SPRITE_ENABLE here.
* Doing so could cause underruns.
*/
}
static void ilk_wm_get_hw_state(struct drm_i915_private *dev_priv)
{
struct ilk_wm_values *hw = &dev_priv->display.wm.hw;
struct intel_crtc *crtc;
ilk_init_lp_watermarks(dev_priv);
for_each_intel_crtc(&dev_priv->drm, crtc)
ilk_pipe_wm_get_hw_state(crtc);
hw->wm_lp[0] = intel_uncore_read(&dev_priv->uncore, WM1_LP_ILK);
hw->wm_lp[1] = intel_uncore_read(&dev_priv->uncore, WM2_LP_ILK);
hw->wm_lp[2] = intel_uncore_read(&dev_priv->uncore, WM3_LP_ILK);
hw->wm_lp_spr[0] = intel_uncore_read(&dev_priv->uncore, WM1S_LP_ILK);
if (DISPLAY_VER(dev_priv) >= 7) {
hw->wm_lp_spr[1] = intel_uncore_read(&dev_priv->uncore, WM2S_LP_IVB);
hw->wm_lp_spr[2] = intel_uncore_read(&dev_priv->uncore, WM3S_LP_IVB);
}
if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
hw->partitioning = (intel_uncore_read(&dev_priv->uncore, WM_MISC) &
WM_MISC_DATA_PARTITION_5_6) ?
INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
else if (IS_IVYBRIDGE(dev_priv))
hw->partitioning = (intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL2) &
DISP_DATA_PARTITION_5_6) ?
INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
hw->enable_fbc_wm =
!(intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) & DISP_FBC_WM_DIS);
}
static const struct intel_wm_funcs ilk_wm_funcs = {
.compute_pipe_wm = ilk_compute_pipe_wm,
.compute_intermediate_wm = ilk_compute_intermediate_wm,
.initial_watermarks = ilk_initial_watermarks,
.optimize_watermarks = ilk_optimize_watermarks,
.get_hw_state = ilk_wm_get_hw_state,
};
static const struct intel_wm_funcs vlv_wm_funcs = {
.compute_pipe_wm = vlv_compute_pipe_wm,
.compute_intermediate_wm = vlv_compute_intermediate_wm,
.initial_watermarks = vlv_initial_watermarks,
.optimize_watermarks = vlv_optimize_watermarks,
.atomic_update_watermarks = vlv_atomic_update_fifo,
.get_hw_state = vlv_wm_get_hw_state_and_sanitize,
};
static const struct intel_wm_funcs g4x_wm_funcs = {
.compute_pipe_wm = g4x_compute_pipe_wm,
.compute_intermediate_wm = g4x_compute_intermediate_wm,
.initial_watermarks = g4x_initial_watermarks,
.optimize_watermarks = g4x_optimize_watermarks,
.get_hw_state = g4x_wm_get_hw_state_and_sanitize,
};
static const struct intel_wm_funcs pnv_wm_funcs = {
.update_wm = pnv_update_wm,
};
static const struct intel_wm_funcs i965_wm_funcs = {
.update_wm = i965_update_wm,
};
static const struct intel_wm_funcs i9xx_wm_funcs = {
.update_wm = i9xx_update_wm,
};
static const struct intel_wm_funcs i845_wm_funcs = {
.update_wm = i845_update_wm,
};
static const struct intel_wm_funcs nop_funcs = {
};
void i9xx_wm_init(struct drm_i915_private *dev_priv)
{
/* For FIFO watermark updates */
if (HAS_PCH_SPLIT(dev_priv)) {
ilk_setup_wm_latency(dev_priv);
dev_priv->display.funcs.wm = &ilk_wm_funcs;
} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
vlv_setup_wm_latency(dev_priv);
dev_priv->display.funcs.wm = &vlv_wm_funcs;
} else if (IS_G4X(dev_priv)) {
g4x_setup_wm_latency(dev_priv);
dev_priv->display.funcs.wm = &g4x_wm_funcs;
} else if (IS_PINEVIEW(dev_priv)) {
if (!intel_get_cxsr_latency(!IS_MOBILE(dev_priv),
dev_priv->is_ddr3,
dev_priv->fsb_freq,
dev_priv->mem_freq)) {
drm_info(&dev_priv->drm,
"failed to find known CxSR latency "
"(found ddr%s fsb freq %d, mem freq %d), "
"disabling CxSR\n",
(dev_priv->is_ddr3 == 1) ? "3" : "2",
dev_priv->fsb_freq, dev_priv->mem_freq);
/* Disable CxSR and never update its watermark again */
intel_set_memory_cxsr(dev_priv, false);
dev_priv->display.funcs.wm = &nop_funcs;
} else {
dev_priv->display.funcs.wm = &pnv_wm_funcs;
}
} else if (DISPLAY_VER(dev_priv) == 4) {
dev_priv->display.funcs.wm = &i965_wm_funcs;
} else if (DISPLAY_VER(dev_priv) == 3) {
dev_priv->display.funcs.wm = &i9xx_wm_funcs;
} else if (DISPLAY_VER(dev_priv) == 2) {
if (INTEL_NUM_PIPES(dev_priv) == 1)
dev_priv->display.funcs.wm = &i845_wm_funcs;
else
dev_priv->display.funcs.wm = &i9xx_wm_funcs;
} else {
drm_err(&dev_priv->drm,
"unexpected fall-through in %s\n", __func__);
dev_priv->display.funcs.wm = &nop_funcs;
}
}
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