1844 lines
49 KiB
C
1844 lines
49 KiB
C
/*
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* Copyright © 2014 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* DOC: Frame Buffer Compression (FBC)
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*
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* FBC tries to save memory bandwidth (and so power consumption) by
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* compressing the amount of memory used by the display. It is total
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* transparent to user space and completely handled in the kernel.
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*
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* The benefits of FBC are mostly visible with solid backgrounds and
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* variation-less patterns. It comes from keeping the memory footprint small
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* and having fewer memory pages opened and accessed for refreshing the display.
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*
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* i915 is responsible to reserve stolen memory for FBC and configure its
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* offset on proper registers. The hardware takes care of all
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* compress/decompress. However there are many known cases where we have to
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* forcibly disable it to allow proper screen updates.
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*/
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#include <linux/string_helpers.h>
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#include <drm/drm_blend.h>
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#include <drm/drm_fourcc.h>
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#include "i915_drv.h"
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#include "i915_utils.h"
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#include "i915_vgpu.h"
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#include "intel_cdclk.h"
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#include "intel_de.h"
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#include "intel_display_trace.h"
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#include "intel_display_types.h"
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#include "intel_fbc.h"
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#include "intel_frontbuffer.h"
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#define for_each_fbc_id(__dev_priv, __fbc_id) \
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for ((__fbc_id) = INTEL_FBC_A; (__fbc_id) < I915_MAX_FBCS; (__fbc_id)++) \
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for_each_if(RUNTIME_INFO(__dev_priv)->fbc_mask & BIT(__fbc_id))
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#define for_each_intel_fbc(__dev_priv, __fbc, __fbc_id) \
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for_each_fbc_id((__dev_priv), (__fbc_id)) \
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for_each_if((__fbc) = (__dev_priv)->display.fbc[(__fbc_id)])
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struct intel_fbc_funcs {
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void (*activate)(struct intel_fbc *fbc);
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void (*deactivate)(struct intel_fbc *fbc);
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bool (*is_active)(struct intel_fbc *fbc);
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bool (*is_compressing)(struct intel_fbc *fbc);
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void (*nuke)(struct intel_fbc *fbc);
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void (*program_cfb)(struct intel_fbc *fbc);
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void (*set_false_color)(struct intel_fbc *fbc, bool enable);
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};
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struct intel_fbc_state {
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struct intel_plane *plane;
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unsigned int cfb_stride;
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unsigned int cfb_size;
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unsigned int fence_y_offset;
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u16 override_cfb_stride;
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u16 interval;
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s8 fence_id;
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};
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struct intel_fbc {
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struct drm_i915_private *i915;
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const struct intel_fbc_funcs *funcs;
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/*
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* This is always the inner lock when overlapping with
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* struct_mutex and it's the outer lock when overlapping
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* with stolen_lock.
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*/
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struct mutex lock;
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unsigned int busy_bits;
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struct drm_mm_node compressed_fb;
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struct drm_mm_node compressed_llb;
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enum intel_fbc_id id;
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u8 limit;
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bool false_color;
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bool active;
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bool activated;
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bool flip_pending;
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bool underrun_detected;
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struct work_struct underrun_work;
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/*
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* This structure contains everything that's relevant to program the
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* hardware registers. When we want to figure out if we need to disable
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* and re-enable FBC for a new configuration we just check if there's
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* something different in the struct. The genx_fbc_activate functions
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* are supposed to read from it in order to program the registers.
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*/
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struct intel_fbc_state state;
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const char *no_fbc_reason;
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};
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/* plane stride in pixels */
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static unsigned int intel_fbc_plane_stride(const struct intel_plane_state *plane_state)
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{
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const struct drm_framebuffer *fb = plane_state->hw.fb;
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unsigned int stride;
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stride = plane_state->view.color_plane[0].mapping_stride;
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if (!drm_rotation_90_or_270(plane_state->hw.rotation))
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stride /= fb->format->cpp[0];
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return stride;
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}
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/* plane stride based cfb stride in bytes, assuming 1:1 compression limit */
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static unsigned int _intel_fbc_cfb_stride(const struct intel_plane_state *plane_state)
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{
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unsigned int cpp = 4; /* FBC always 4 bytes per pixel */
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return intel_fbc_plane_stride(plane_state) * cpp;
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}
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/* minimum acceptable cfb stride in bytes, assuming 1:1 compression limit */
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static unsigned int skl_fbc_min_cfb_stride(const struct intel_plane_state *plane_state)
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{
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struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
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unsigned int limit = 4; /* 1:4 compression limit is the worst case */
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unsigned int cpp = 4; /* FBC always 4 bytes per pixel */
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unsigned int width = drm_rect_width(&plane_state->uapi.src) >> 16;
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unsigned int height = 4; /* FBC segment is 4 lines */
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unsigned int stride;
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/* minimum segment stride we can use */
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stride = width * cpp * height / limit;
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/*
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* Wa_16011863758: icl+
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* Avoid some hardware segment address miscalculation.
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*/
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if (DISPLAY_VER(i915) >= 11)
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stride += 64;
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/*
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* At least some of the platforms require each 4 line segment to
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* be 512 byte aligned. Just do it always for simplicity.
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*/
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stride = ALIGN(stride, 512);
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/* convert back to single line equivalent with 1:1 compression limit */
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return stride * limit / height;
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}
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/* properly aligned cfb stride in bytes, assuming 1:1 compression limit */
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static unsigned int intel_fbc_cfb_stride(const struct intel_plane_state *plane_state)
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{
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struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
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unsigned int stride = _intel_fbc_cfb_stride(plane_state);
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/*
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* At least some of the platforms require each 4 line segment to
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* be 512 byte aligned. Aligning each line to 512 bytes guarantees
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* that regardless of the compression limit we choose later.
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*/
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if (DISPLAY_VER(i915) >= 9)
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return max(ALIGN(stride, 512), skl_fbc_min_cfb_stride(plane_state));
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else
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return stride;
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}
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static unsigned int intel_fbc_cfb_size(const struct intel_plane_state *plane_state)
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{
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struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
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int lines = drm_rect_height(&plane_state->uapi.src) >> 16;
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if (DISPLAY_VER(i915) == 7)
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lines = min(lines, 2048);
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else if (DISPLAY_VER(i915) >= 8)
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lines = min(lines, 2560);
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return lines * intel_fbc_cfb_stride(plane_state);
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}
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static u16 intel_fbc_override_cfb_stride(const struct intel_plane_state *plane_state)
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{
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struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
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unsigned int stride_aligned = intel_fbc_cfb_stride(plane_state);
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unsigned int stride = _intel_fbc_cfb_stride(plane_state);
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const struct drm_framebuffer *fb = plane_state->hw.fb;
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/*
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* Override stride in 64 byte units per 4 line segment.
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*
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* Gen9 hw miscalculates cfb stride for linear as
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* PLANE_STRIDE*512 instead of PLANE_STRIDE*64, so
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* we always need to use the override there.
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*/
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if (stride != stride_aligned ||
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(DISPLAY_VER(i915) == 9 && fb->modifier == DRM_FORMAT_MOD_LINEAR))
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return stride_aligned * 4 / 64;
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return 0;
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}
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static u32 i8xx_fbc_ctl(struct intel_fbc *fbc)
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{
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const struct intel_fbc_state *fbc_state = &fbc->state;
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struct drm_i915_private *i915 = fbc->i915;
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unsigned int cfb_stride;
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u32 fbc_ctl;
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cfb_stride = fbc_state->cfb_stride / fbc->limit;
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/* FBC_CTL wants 32B or 64B units */
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if (DISPLAY_VER(i915) == 2)
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cfb_stride = (cfb_stride / 32) - 1;
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else
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cfb_stride = (cfb_stride / 64) - 1;
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fbc_ctl = FBC_CTL_PERIODIC |
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FBC_CTL_INTERVAL(fbc_state->interval) |
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FBC_CTL_STRIDE(cfb_stride);
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if (IS_I945GM(i915))
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fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
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if (fbc_state->fence_id >= 0)
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fbc_ctl |= FBC_CTL_FENCENO(fbc_state->fence_id);
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return fbc_ctl;
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}
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static u32 i965_fbc_ctl2(struct intel_fbc *fbc)
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{
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const struct intel_fbc_state *fbc_state = &fbc->state;
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u32 fbc_ctl2;
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fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM |
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FBC_CTL_PLANE(fbc_state->plane->i9xx_plane);
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if (fbc_state->fence_id >= 0)
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fbc_ctl2 |= FBC_CTL_CPU_FENCE_EN;
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return fbc_ctl2;
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}
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static void i8xx_fbc_deactivate(struct intel_fbc *fbc)
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{
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struct drm_i915_private *i915 = fbc->i915;
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u32 fbc_ctl;
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/* Disable compression */
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fbc_ctl = intel_de_read(i915, FBC_CONTROL);
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if ((fbc_ctl & FBC_CTL_EN) == 0)
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return;
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fbc_ctl &= ~FBC_CTL_EN;
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intel_de_write(i915, FBC_CONTROL, fbc_ctl);
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/* Wait for compressing bit to clear */
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if (intel_de_wait_for_clear(i915, FBC_STATUS,
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FBC_STAT_COMPRESSING, 10)) {
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drm_dbg_kms(&i915->drm, "FBC idle timed out\n");
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return;
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}
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}
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static void i8xx_fbc_activate(struct intel_fbc *fbc)
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{
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const struct intel_fbc_state *fbc_state = &fbc->state;
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struct drm_i915_private *i915 = fbc->i915;
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int i;
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/* Clear old tags */
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for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
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intel_de_write(i915, FBC_TAG(i), 0);
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if (DISPLAY_VER(i915) == 4) {
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intel_de_write(i915, FBC_CONTROL2,
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i965_fbc_ctl2(fbc));
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intel_de_write(i915, FBC_FENCE_OFF,
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fbc_state->fence_y_offset);
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}
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intel_de_write(i915, FBC_CONTROL,
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FBC_CTL_EN | i8xx_fbc_ctl(fbc));
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}
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static bool i8xx_fbc_is_active(struct intel_fbc *fbc)
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{
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return intel_de_read(fbc->i915, FBC_CONTROL) & FBC_CTL_EN;
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}
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static bool i8xx_fbc_is_compressing(struct intel_fbc *fbc)
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{
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return intel_de_read(fbc->i915, FBC_STATUS) &
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(FBC_STAT_COMPRESSING | FBC_STAT_COMPRESSED);
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}
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static void i8xx_fbc_nuke(struct intel_fbc *fbc)
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{
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struct intel_fbc_state *fbc_state = &fbc->state;
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enum i9xx_plane_id i9xx_plane = fbc_state->plane->i9xx_plane;
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struct drm_i915_private *dev_priv = fbc->i915;
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intel_de_write_fw(dev_priv, DSPADDR(i9xx_plane),
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intel_de_read_fw(dev_priv, DSPADDR(i9xx_plane)));
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}
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static void i8xx_fbc_program_cfb(struct intel_fbc *fbc)
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{
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struct drm_i915_private *i915 = fbc->i915;
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GEM_BUG_ON(range_overflows_end_t(u64, i915->dsm.stolen.start,
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fbc->compressed_fb.start, U32_MAX));
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GEM_BUG_ON(range_overflows_end_t(u64, i915->dsm.stolen.start,
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fbc->compressed_llb.start, U32_MAX));
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intel_de_write(i915, FBC_CFB_BASE,
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i915->dsm.stolen.start + fbc->compressed_fb.start);
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intel_de_write(i915, FBC_LL_BASE,
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i915->dsm.stolen.start + fbc->compressed_llb.start);
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}
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static const struct intel_fbc_funcs i8xx_fbc_funcs = {
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.activate = i8xx_fbc_activate,
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.deactivate = i8xx_fbc_deactivate,
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.is_active = i8xx_fbc_is_active,
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.is_compressing = i8xx_fbc_is_compressing,
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.nuke = i8xx_fbc_nuke,
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.program_cfb = i8xx_fbc_program_cfb,
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};
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static void i965_fbc_nuke(struct intel_fbc *fbc)
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{
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struct intel_fbc_state *fbc_state = &fbc->state;
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enum i9xx_plane_id i9xx_plane = fbc_state->plane->i9xx_plane;
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struct drm_i915_private *dev_priv = fbc->i915;
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intel_de_write_fw(dev_priv, DSPSURF(i9xx_plane),
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intel_de_read_fw(dev_priv, DSPSURF(i9xx_plane)));
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}
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static const struct intel_fbc_funcs i965_fbc_funcs = {
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.activate = i8xx_fbc_activate,
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.deactivate = i8xx_fbc_deactivate,
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.is_active = i8xx_fbc_is_active,
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.is_compressing = i8xx_fbc_is_compressing,
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.nuke = i965_fbc_nuke,
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.program_cfb = i8xx_fbc_program_cfb,
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};
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static u32 g4x_dpfc_ctl_limit(struct intel_fbc *fbc)
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{
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switch (fbc->limit) {
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default:
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MISSING_CASE(fbc->limit);
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fallthrough;
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case 1:
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return DPFC_CTL_LIMIT_1X;
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case 2:
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return DPFC_CTL_LIMIT_2X;
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case 4:
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return DPFC_CTL_LIMIT_4X;
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}
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}
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static u32 g4x_dpfc_ctl(struct intel_fbc *fbc)
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{
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const struct intel_fbc_state *fbc_state = &fbc->state;
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struct drm_i915_private *i915 = fbc->i915;
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u32 dpfc_ctl;
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dpfc_ctl = g4x_dpfc_ctl_limit(fbc) |
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DPFC_CTL_PLANE_G4X(fbc_state->plane->i9xx_plane);
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if (IS_G4X(i915))
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dpfc_ctl |= DPFC_CTL_SR_EN;
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if (fbc_state->fence_id >= 0) {
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dpfc_ctl |= DPFC_CTL_FENCE_EN_G4X;
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if (DISPLAY_VER(i915) < 6)
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dpfc_ctl |= DPFC_CTL_FENCENO(fbc_state->fence_id);
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}
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return dpfc_ctl;
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}
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static void g4x_fbc_activate(struct intel_fbc *fbc)
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{
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const struct intel_fbc_state *fbc_state = &fbc->state;
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struct drm_i915_private *i915 = fbc->i915;
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intel_de_write(i915, DPFC_FENCE_YOFF,
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fbc_state->fence_y_offset);
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intel_de_write(i915, DPFC_CONTROL,
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DPFC_CTL_EN | g4x_dpfc_ctl(fbc));
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}
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static void g4x_fbc_deactivate(struct intel_fbc *fbc)
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{
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struct drm_i915_private *i915 = fbc->i915;
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u32 dpfc_ctl;
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/* Disable compression */
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dpfc_ctl = intel_de_read(i915, DPFC_CONTROL);
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if (dpfc_ctl & DPFC_CTL_EN) {
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dpfc_ctl &= ~DPFC_CTL_EN;
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intel_de_write(i915, DPFC_CONTROL, dpfc_ctl);
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}
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}
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static bool g4x_fbc_is_active(struct intel_fbc *fbc)
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{
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return intel_de_read(fbc->i915, DPFC_CONTROL) & DPFC_CTL_EN;
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}
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static bool g4x_fbc_is_compressing(struct intel_fbc *fbc)
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{
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return intel_de_read(fbc->i915, DPFC_STATUS) & DPFC_COMP_SEG_MASK;
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}
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static void g4x_fbc_program_cfb(struct intel_fbc *fbc)
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{
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struct drm_i915_private *i915 = fbc->i915;
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intel_de_write(i915, DPFC_CB_BASE, fbc->compressed_fb.start);
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}
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static const struct intel_fbc_funcs g4x_fbc_funcs = {
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.activate = g4x_fbc_activate,
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.deactivate = g4x_fbc_deactivate,
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.is_active = g4x_fbc_is_active,
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.is_compressing = g4x_fbc_is_compressing,
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.nuke = i965_fbc_nuke,
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.program_cfb = g4x_fbc_program_cfb,
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};
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static void ilk_fbc_activate(struct intel_fbc *fbc)
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{
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struct intel_fbc_state *fbc_state = &fbc->state;
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struct drm_i915_private *i915 = fbc->i915;
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|
|
intel_de_write(i915, ILK_DPFC_FENCE_YOFF(fbc->id),
|
|
fbc_state->fence_y_offset);
|
|
|
|
intel_de_write(i915, ILK_DPFC_CONTROL(fbc->id),
|
|
DPFC_CTL_EN | g4x_dpfc_ctl(fbc));
|
|
}
|
|
|
|
static void ilk_fbc_deactivate(struct intel_fbc *fbc)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
u32 dpfc_ctl;
|
|
|
|
/* Disable compression */
|
|
dpfc_ctl = intel_de_read(i915, ILK_DPFC_CONTROL(fbc->id));
|
|
if (dpfc_ctl & DPFC_CTL_EN) {
|
|
dpfc_ctl &= ~DPFC_CTL_EN;
|
|
intel_de_write(i915, ILK_DPFC_CONTROL(fbc->id), dpfc_ctl);
|
|
}
|
|
}
|
|
|
|
static bool ilk_fbc_is_active(struct intel_fbc *fbc)
|
|
{
|
|
return intel_de_read(fbc->i915, ILK_DPFC_CONTROL(fbc->id)) & DPFC_CTL_EN;
|
|
}
|
|
|
|
static bool ilk_fbc_is_compressing(struct intel_fbc *fbc)
|
|
{
|
|
return intel_de_read(fbc->i915, ILK_DPFC_STATUS(fbc->id)) & DPFC_COMP_SEG_MASK;
|
|
}
|
|
|
|
static void ilk_fbc_program_cfb(struct intel_fbc *fbc)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
|
|
intel_de_write(i915, ILK_DPFC_CB_BASE(fbc->id), fbc->compressed_fb.start);
|
|
}
|
|
|
|
static const struct intel_fbc_funcs ilk_fbc_funcs = {
|
|
.activate = ilk_fbc_activate,
|
|
.deactivate = ilk_fbc_deactivate,
|
|
.is_active = ilk_fbc_is_active,
|
|
.is_compressing = ilk_fbc_is_compressing,
|
|
.nuke = i965_fbc_nuke,
|
|
.program_cfb = ilk_fbc_program_cfb,
|
|
};
|
|
|
|
static void snb_fbc_program_fence(struct intel_fbc *fbc)
|
|
{
|
|
const struct intel_fbc_state *fbc_state = &fbc->state;
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
u32 ctl = 0;
|
|
|
|
if (fbc_state->fence_id >= 0)
|
|
ctl = SNB_DPFC_FENCE_EN | SNB_DPFC_FENCENO(fbc_state->fence_id);
|
|
|
|
intel_de_write(i915, SNB_DPFC_CTL_SA, ctl);
|
|
intel_de_write(i915, SNB_DPFC_CPU_FENCE_OFFSET, fbc_state->fence_y_offset);
|
|
}
|
|
|
|
static void snb_fbc_activate(struct intel_fbc *fbc)
|
|
{
|
|
snb_fbc_program_fence(fbc);
|
|
|
|
ilk_fbc_activate(fbc);
|
|
}
|
|
|
|
static void snb_fbc_nuke(struct intel_fbc *fbc)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
|
|
intel_de_write(i915, MSG_FBC_REND_STATE(fbc->id), FBC_REND_NUKE);
|
|
intel_de_posting_read(i915, MSG_FBC_REND_STATE(fbc->id));
|
|
}
|
|
|
|
static const struct intel_fbc_funcs snb_fbc_funcs = {
|
|
.activate = snb_fbc_activate,
|
|
.deactivate = ilk_fbc_deactivate,
|
|
.is_active = ilk_fbc_is_active,
|
|
.is_compressing = ilk_fbc_is_compressing,
|
|
.nuke = snb_fbc_nuke,
|
|
.program_cfb = ilk_fbc_program_cfb,
|
|
};
|
|
|
|
static void glk_fbc_program_cfb_stride(struct intel_fbc *fbc)
|
|
{
|
|
const struct intel_fbc_state *fbc_state = &fbc->state;
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
u32 val = 0;
|
|
|
|
if (fbc_state->override_cfb_stride)
|
|
val |= FBC_STRIDE_OVERRIDE |
|
|
FBC_STRIDE(fbc_state->override_cfb_stride / fbc->limit);
|
|
|
|
intel_de_write(i915, GLK_FBC_STRIDE(fbc->id), val);
|
|
}
|
|
|
|
static void skl_fbc_program_cfb_stride(struct intel_fbc *fbc)
|
|
{
|
|
const struct intel_fbc_state *fbc_state = &fbc->state;
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
u32 val = 0;
|
|
|
|
/* Display WA #0529: skl, kbl, bxt. */
|
|
if (fbc_state->override_cfb_stride)
|
|
val |= CHICKEN_FBC_STRIDE_OVERRIDE |
|
|
CHICKEN_FBC_STRIDE(fbc_state->override_cfb_stride / fbc->limit);
|
|
|
|
intel_de_rmw(i915, CHICKEN_MISC_4,
|
|
CHICKEN_FBC_STRIDE_OVERRIDE |
|
|
CHICKEN_FBC_STRIDE_MASK, val);
|
|
}
|
|
|
|
static u32 ivb_dpfc_ctl(struct intel_fbc *fbc)
|
|
{
|
|
const struct intel_fbc_state *fbc_state = &fbc->state;
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
u32 dpfc_ctl;
|
|
|
|
dpfc_ctl = g4x_dpfc_ctl_limit(fbc);
|
|
|
|
if (IS_IVYBRIDGE(i915))
|
|
dpfc_ctl |= DPFC_CTL_PLANE_IVB(fbc_state->plane->i9xx_plane);
|
|
|
|
if (fbc_state->fence_id >= 0)
|
|
dpfc_ctl |= DPFC_CTL_FENCE_EN_IVB;
|
|
|
|
if (fbc->false_color)
|
|
dpfc_ctl |= DPFC_CTL_FALSE_COLOR;
|
|
|
|
return dpfc_ctl;
|
|
}
|
|
|
|
static void ivb_fbc_activate(struct intel_fbc *fbc)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
|
|
if (DISPLAY_VER(i915) >= 10)
|
|
glk_fbc_program_cfb_stride(fbc);
|
|
else if (DISPLAY_VER(i915) == 9)
|
|
skl_fbc_program_cfb_stride(fbc);
|
|
|
|
if (to_gt(i915)->ggtt->num_fences)
|
|
snb_fbc_program_fence(fbc);
|
|
|
|
intel_de_write(i915, ILK_DPFC_CONTROL(fbc->id),
|
|
DPFC_CTL_EN | ivb_dpfc_ctl(fbc));
|
|
}
|
|
|
|
static bool ivb_fbc_is_compressing(struct intel_fbc *fbc)
|
|
{
|
|
return intel_de_read(fbc->i915, ILK_DPFC_STATUS2(fbc->id)) & DPFC_COMP_SEG_MASK_IVB;
|
|
}
|
|
|
|
static void ivb_fbc_set_false_color(struct intel_fbc *fbc,
|
|
bool enable)
|
|
{
|
|
intel_de_rmw(fbc->i915, ILK_DPFC_CONTROL(fbc->id),
|
|
DPFC_CTL_FALSE_COLOR, enable ? DPFC_CTL_FALSE_COLOR : 0);
|
|
}
|
|
|
|
static const struct intel_fbc_funcs ivb_fbc_funcs = {
|
|
.activate = ivb_fbc_activate,
|
|
.deactivate = ilk_fbc_deactivate,
|
|
.is_active = ilk_fbc_is_active,
|
|
.is_compressing = ivb_fbc_is_compressing,
|
|
.nuke = snb_fbc_nuke,
|
|
.program_cfb = ilk_fbc_program_cfb,
|
|
.set_false_color = ivb_fbc_set_false_color,
|
|
};
|
|
|
|
static bool intel_fbc_hw_is_active(struct intel_fbc *fbc)
|
|
{
|
|
return fbc->funcs->is_active(fbc);
|
|
}
|
|
|
|
static void intel_fbc_hw_activate(struct intel_fbc *fbc)
|
|
{
|
|
trace_intel_fbc_activate(fbc->state.plane);
|
|
|
|
fbc->active = true;
|
|
fbc->activated = true;
|
|
|
|
fbc->funcs->activate(fbc);
|
|
}
|
|
|
|
static void intel_fbc_hw_deactivate(struct intel_fbc *fbc)
|
|
{
|
|
trace_intel_fbc_deactivate(fbc->state.plane);
|
|
|
|
fbc->active = false;
|
|
|
|
fbc->funcs->deactivate(fbc);
|
|
}
|
|
|
|
static bool intel_fbc_is_compressing(struct intel_fbc *fbc)
|
|
{
|
|
return fbc->funcs->is_compressing(fbc);
|
|
}
|
|
|
|
static void intel_fbc_nuke(struct intel_fbc *fbc)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
|
|
lockdep_assert_held(&fbc->lock);
|
|
drm_WARN_ON(&i915->drm, fbc->flip_pending);
|
|
|
|
trace_intel_fbc_nuke(fbc->state.plane);
|
|
|
|
fbc->funcs->nuke(fbc);
|
|
}
|
|
|
|
static void intel_fbc_activate(struct intel_fbc *fbc)
|
|
{
|
|
lockdep_assert_held(&fbc->lock);
|
|
|
|
intel_fbc_hw_activate(fbc);
|
|
intel_fbc_nuke(fbc);
|
|
|
|
fbc->no_fbc_reason = NULL;
|
|
}
|
|
|
|
static void intel_fbc_deactivate(struct intel_fbc *fbc, const char *reason)
|
|
{
|
|
lockdep_assert_held(&fbc->lock);
|
|
|
|
if (fbc->active)
|
|
intel_fbc_hw_deactivate(fbc);
|
|
|
|
fbc->no_fbc_reason = reason;
|
|
}
|
|
|
|
static u64 intel_fbc_cfb_base_max(struct drm_i915_private *i915)
|
|
{
|
|
if (DISPLAY_VER(i915) >= 5 || IS_G4X(i915))
|
|
return BIT_ULL(28);
|
|
else
|
|
return BIT_ULL(32);
|
|
}
|
|
|
|
static u64 intel_fbc_stolen_end(struct drm_i915_private *i915)
|
|
{
|
|
u64 end;
|
|
|
|
/* The FBC hardware for BDW/SKL doesn't have access to the stolen
|
|
* reserved range size, so it always assumes the maximum (8mb) is used.
|
|
* If we enable FBC using a CFB on that memory range we'll get FIFO
|
|
* underruns, even if that range is not reserved by the BIOS. */
|
|
if (IS_BROADWELL(i915) ||
|
|
(DISPLAY_VER(i915) == 9 && !IS_BROXTON(i915)))
|
|
end = resource_size(&i915->dsm.stolen) - 8 * 1024 * 1024;
|
|
else
|
|
end = U64_MAX;
|
|
|
|
return min(end, intel_fbc_cfb_base_max(i915));
|
|
}
|
|
|
|
static int intel_fbc_min_limit(const struct intel_plane_state *plane_state)
|
|
{
|
|
return plane_state->hw.fb->format->cpp[0] == 2 ? 2 : 1;
|
|
}
|
|
|
|
static int intel_fbc_max_limit(struct drm_i915_private *i915)
|
|
{
|
|
/* WaFbcOnly1to1Ratio:ctg */
|
|
if (IS_G4X(i915))
|
|
return 1;
|
|
|
|
/*
|
|
* FBC2 can only do 1:1, 1:2, 1:4, we limit
|
|
* FBC1 to the same out of convenience.
|
|
*/
|
|
return 4;
|
|
}
|
|
|
|
static int find_compression_limit(struct intel_fbc *fbc,
|
|
unsigned int size, int min_limit)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
u64 end = intel_fbc_stolen_end(i915);
|
|
int ret, limit = min_limit;
|
|
|
|
size /= limit;
|
|
|
|
/* Try to over-allocate to reduce reallocations and fragmentation. */
|
|
ret = i915_gem_stolen_insert_node_in_range(i915, &fbc->compressed_fb,
|
|
size <<= 1, 4096, 0, end);
|
|
if (ret == 0)
|
|
return limit;
|
|
|
|
for (; limit <= intel_fbc_max_limit(i915); limit <<= 1) {
|
|
ret = i915_gem_stolen_insert_node_in_range(i915, &fbc->compressed_fb,
|
|
size >>= 1, 4096, 0, end);
|
|
if (ret == 0)
|
|
return limit;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_fbc_alloc_cfb(struct intel_fbc *fbc,
|
|
unsigned int size, int min_limit)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
int ret;
|
|
|
|
drm_WARN_ON(&i915->drm,
|
|
drm_mm_node_allocated(&fbc->compressed_fb));
|
|
drm_WARN_ON(&i915->drm,
|
|
drm_mm_node_allocated(&fbc->compressed_llb));
|
|
|
|
if (DISPLAY_VER(i915) < 5 && !IS_G4X(i915)) {
|
|
ret = i915_gem_stolen_insert_node(i915, &fbc->compressed_llb,
|
|
4096, 4096);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
ret = find_compression_limit(fbc, size, min_limit);
|
|
if (!ret)
|
|
goto err_llb;
|
|
else if (ret > min_limit)
|
|
drm_info_once(&i915->drm,
|
|
"Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n");
|
|
|
|
fbc->limit = ret;
|
|
|
|
drm_dbg_kms(&i915->drm,
|
|
"reserved %llu bytes of contiguous stolen space for FBC, limit: %d\n",
|
|
fbc->compressed_fb.size, fbc->limit);
|
|
|
|
return 0;
|
|
|
|
err_llb:
|
|
if (drm_mm_node_allocated(&fbc->compressed_llb))
|
|
i915_gem_stolen_remove_node(i915, &fbc->compressed_llb);
|
|
err:
|
|
if (drm_mm_initialized(&i915->mm.stolen))
|
|
drm_info_once(&i915->drm, "not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size);
|
|
return -ENOSPC;
|
|
}
|
|
|
|
static void intel_fbc_program_cfb(struct intel_fbc *fbc)
|
|
{
|
|
fbc->funcs->program_cfb(fbc);
|
|
}
|
|
|
|
static void intel_fbc_program_workarounds(struct intel_fbc *fbc)
|
|
{
|
|
/* Wa_22014263786:icl,jsl,tgl,dg1,rkl,adls,adlp,mtl */
|
|
if (DISPLAY_VER(fbc->i915) >= 11 && !IS_DG2(fbc->i915))
|
|
intel_de_rmw(fbc->i915, ILK_DPFC_CHICKEN(fbc->id), 0,
|
|
DPFC_CHICKEN_FORCE_SLB_INVALIDATION);
|
|
}
|
|
|
|
static void __intel_fbc_cleanup_cfb(struct intel_fbc *fbc)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
|
|
if (WARN_ON(intel_fbc_hw_is_active(fbc)))
|
|
return;
|
|
|
|
if (drm_mm_node_allocated(&fbc->compressed_llb))
|
|
i915_gem_stolen_remove_node(i915, &fbc->compressed_llb);
|
|
if (drm_mm_node_allocated(&fbc->compressed_fb))
|
|
i915_gem_stolen_remove_node(i915, &fbc->compressed_fb);
|
|
}
|
|
|
|
void intel_fbc_cleanup(struct drm_i915_private *i915)
|
|
{
|
|
struct intel_fbc *fbc;
|
|
enum intel_fbc_id fbc_id;
|
|
|
|
for_each_intel_fbc(i915, fbc, fbc_id) {
|
|
mutex_lock(&fbc->lock);
|
|
__intel_fbc_cleanup_cfb(fbc);
|
|
mutex_unlock(&fbc->lock);
|
|
|
|
kfree(fbc);
|
|
}
|
|
}
|
|
|
|
static bool stride_is_valid(const struct intel_plane_state *plane_state)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
|
|
const struct drm_framebuffer *fb = plane_state->hw.fb;
|
|
unsigned int stride = intel_fbc_plane_stride(plane_state) *
|
|
fb->format->cpp[0];
|
|
|
|
/* This should have been caught earlier. */
|
|
if (drm_WARN_ON_ONCE(&i915->drm, (stride & (64 - 1)) != 0))
|
|
return false;
|
|
|
|
/* Below are the additional FBC restrictions. */
|
|
if (stride < 512)
|
|
return false;
|
|
|
|
if (DISPLAY_VER(i915) == 2 || DISPLAY_VER(i915) == 3)
|
|
return stride == 4096 || stride == 8192;
|
|
|
|
if (DISPLAY_VER(i915) == 4 && !IS_G4X(i915) && stride < 2048)
|
|
return false;
|
|
|
|
/* Display WA #1105: skl,bxt,kbl,cfl,glk */
|
|
if ((DISPLAY_VER(i915) == 9 || IS_GEMINILAKE(i915)) &&
|
|
fb->modifier == DRM_FORMAT_MOD_LINEAR && stride & 511)
|
|
return false;
|
|
|
|
if (stride > 16384)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool pixel_format_is_valid(const struct intel_plane_state *plane_state)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
|
|
const struct drm_framebuffer *fb = plane_state->hw.fb;
|
|
|
|
switch (fb->format->format) {
|
|
case DRM_FORMAT_XRGB8888:
|
|
case DRM_FORMAT_XBGR8888:
|
|
return true;
|
|
case DRM_FORMAT_XRGB1555:
|
|
case DRM_FORMAT_RGB565:
|
|
/* 16bpp not supported on gen2 */
|
|
if (DISPLAY_VER(i915) == 2)
|
|
return false;
|
|
/* WaFbcOnly1to1Ratio:ctg */
|
|
if (IS_G4X(i915))
|
|
return false;
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool rotation_is_valid(const struct intel_plane_state *plane_state)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
|
|
const struct drm_framebuffer *fb = plane_state->hw.fb;
|
|
unsigned int rotation = plane_state->hw.rotation;
|
|
|
|
if (DISPLAY_VER(i915) >= 9 && fb->format->format == DRM_FORMAT_RGB565 &&
|
|
drm_rotation_90_or_270(rotation))
|
|
return false;
|
|
else if (DISPLAY_VER(i915) <= 4 && !IS_G4X(i915) &&
|
|
rotation != DRM_MODE_ROTATE_0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* For some reason, the hardware tracking starts looking at whatever we
|
|
* programmed as the display plane base address register. It does not look at
|
|
* the X and Y offset registers. That's why we include the src x/y offsets
|
|
* instead of just looking at the plane size.
|
|
*/
|
|
static bool intel_fbc_hw_tracking_covers_screen(const struct intel_plane_state *plane_state)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
|
|
unsigned int effective_w, effective_h, max_w, max_h;
|
|
|
|
if (DISPLAY_VER(i915) >= 10) {
|
|
max_w = 5120;
|
|
max_h = 4096;
|
|
} else if (DISPLAY_VER(i915) >= 8 || IS_HASWELL(i915)) {
|
|
max_w = 4096;
|
|
max_h = 4096;
|
|
} else if (IS_G4X(i915) || DISPLAY_VER(i915) >= 5) {
|
|
max_w = 4096;
|
|
max_h = 2048;
|
|
} else {
|
|
max_w = 2048;
|
|
max_h = 1536;
|
|
}
|
|
|
|
effective_w = plane_state->view.color_plane[0].x +
|
|
(drm_rect_width(&plane_state->uapi.src) >> 16);
|
|
effective_h = plane_state->view.color_plane[0].y +
|
|
(drm_rect_height(&plane_state->uapi.src) >> 16);
|
|
|
|
return effective_w <= max_w && effective_h <= max_h;
|
|
}
|
|
|
|
static bool tiling_is_valid(const struct intel_plane_state *plane_state)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
|
|
const struct drm_framebuffer *fb = plane_state->hw.fb;
|
|
|
|
switch (fb->modifier) {
|
|
case DRM_FORMAT_MOD_LINEAR:
|
|
case I915_FORMAT_MOD_Y_TILED:
|
|
case I915_FORMAT_MOD_Yf_TILED:
|
|
return DISPLAY_VER(i915) >= 9;
|
|
case I915_FORMAT_MOD_4_TILED:
|
|
case I915_FORMAT_MOD_X_TILED:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static void intel_fbc_update_state(struct intel_atomic_state *state,
|
|
struct intel_crtc *crtc,
|
|
struct intel_plane *plane)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(state->base.dev);
|
|
const struct intel_crtc_state *crtc_state =
|
|
intel_atomic_get_new_crtc_state(state, crtc);
|
|
const struct intel_plane_state *plane_state =
|
|
intel_atomic_get_new_plane_state(state, plane);
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
struct intel_fbc_state *fbc_state = &fbc->state;
|
|
|
|
WARN_ON(plane_state->no_fbc_reason);
|
|
WARN_ON(fbc_state->plane && fbc_state->plane != plane);
|
|
|
|
fbc_state->plane = plane;
|
|
|
|
/* FBC1 compression interval: arbitrary choice of 1 second */
|
|
fbc_state->interval = drm_mode_vrefresh(&crtc_state->hw.adjusted_mode);
|
|
|
|
fbc_state->fence_y_offset = intel_plane_fence_y_offset(plane_state);
|
|
|
|
drm_WARN_ON(&i915->drm, plane_state->flags & PLANE_HAS_FENCE &&
|
|
!plane_state->ggtt_vma->fence);
|
|
|
|
if (plane_state->flags & PLANE_HAS_FENCE &&
|
|
plane_state->ggtt_vma->fence)
|
|
fbc_state->fence_id = plane_state->ggtt_vma->fence->id;
|
|
else
|
|
fbc_state->fence_id = -1;
|
|
|
|
fbc_state->cfb_stride = intel_fbc_cfb_stride(plane_state);
|
|
fbc_state->cfb_size = intel_fbc_cfb_size(plane_state);
|
|
fbc_state->override_cfb_stride = intel_fbc_override_cfb_stride(plane_state);
|
|
}
|
|
|
|
static bool intel_fbc_is_fence_ok(const struct intel_plane_state *plane_state)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(plane_state->uapi.plane->dev);
|
|
|
|
/*
|
|
* The use of a CPU fence is one of two ways to detect writes by the
|
|
* CPU to the scanout and trigger updates to the FBC.
|
|
*
|
|
* The other method is by software tracking (see
|
|
* intel_fbc_invalidate/flush()), it will manually notify FBC and nuke
|
|
* the current compressed buffer and recompress it.
|
|
*
|
|
* Note that is possible for a tiled surface to be unmappable (and
|
|
* so have no fence associated with it) due to aperture constraints
|
|
* at the time of pinning.
|
|
*/
|
|
return DISPLAY_VER(i915) >= 9 ||
|
|
(plane_state->flags & PLANE_HAS_FENCE &&
|
|
plane_state->ggtt_vma->fence);
|
|
}
|
|
|
|
static bool intel_fbc_is_cfb_ok(const struct intel_plane_state *plane_state)
|
|
{
|
|
struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
|
|
return intel_fbc_min_limit(plane_state) <= fbc->limit &&
|
|
intel_fbc_cfb_size(plane_state) <= fbc->compressed_fb.size * fbc->limit;
|
|
}
|
|
|
|
static bool intel_fbc_is_ok(const struct intel_plane_state *plane_state)
|
|
{
|
|
return !plane_state->no_fbc_reason &&
|
|
intel_fbc_is_fence_ok(plane_state) &&
|
|
intel_fbc_is_cfb_ok(plane_state);
|
|
}
|
|
|
|
static int intel_fbc_check_plane(struct intel_atomic_state *state,
|
|
struct intel_plane *plane)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(state->base.dev);
|
|
struct intel_plane_state *plane_state =
|
|
intel_atomic_get_new_plane_state(state, plane);
|
|
const struct drm_framebuffer *fb = plane_state->hw.fb;
|
|
struct intel_crtc *crtc = to_intel_crtc(plane_state->hw.crtc);
|
|
const struct intel_crtc_state *crtc_state;
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
|
|
if (!fbc)
|
|
return 0;
|
|
|
|
if (intel_vgpu_active(i915)) {
|
|
plane_state->no_fbc_reason = "VGPU active";
|
|
return 0;
|
|
}
|
|
|
|
if (!i915->params.enable_fbc) {
|
|
plane_state->no_fbc_reason = "disabled per module param or by default";
|
|
return 0;
|
|
}
|
|
|
|
if (!plane_state->uapi.visible) {
|
|
plane_state->no_fbc_reason = "plane not visible";
|
|
return 0;
|
|
}
|
|
|
|
crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
|
|
|
|
if (crtc_state->hw.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) {
|
|
plane_state->no_fbc_reason = "interlaced mode not supported";
|
|
return 0;
|
|
}
|
|
|
|
if (crtc_state->double_wide) {
|
|
plane_state->no_fbc_reason = "double wide pipe not supported";
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Display 12+ is not supporting FBC with PSR2.
|
|
* Recommendation is to keep this combination disabled
|
|
* Bspec: 50422 HSD: 14010260002
|
|
*/
|
|
if (DISPLAY_VER(i915) >= 12 && crtc_state->has_psr2) {
|
|
plane_state->no_fbc_reason = "PSR2 enabled";
|
|
return 0;
|
|
}
|
|
|
|
/* Wa_14016291713 */
|
|
if ((IS_DISPLAY_VER(i915, 12, 13) ||
|
|
IS_MTL_DISPLAY_STEP(i915, STEP_A0, STEP_C0)) &&
|
|
crtc_state->has_psr) {
|
|
plane_state->no_fbc_reason = "PSR1 enabled (Wa_14016291713)";
|
|
return 0;
|
|
}
|
|
|
|
if (!pixel_format_is_valid(plane_state)) {
|
|
plane_state->no_fbc_reason = "pixel format not supported";
|
|
return 0;
|
|
}
|
|
|
|
if (!tiling_is_valid(plane_state)) {
|
|
plane_state->no_fbc_reason = "tiling not supported";
|
|
return 0;
|
|
}
|
|
|
|
if (!rotation_is_valid(plane_state)) {
|
|
plane_state->no_fbc_reason = "rotation not supported";
|
|
return 0;
|
|
}
|
|
|
|
if (!stride_is_valid(plane_state)) {
|
|
plane_state->no_fbc_reason = "stride not supported";
|
|
return 0;
|
|
}
|
|
|
|
if (plane_state->hw.pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE &&
|
|
fb->format->has_alpha) {
|
|
plane_state->no_fbc_reason = "per-pixel alpha not supported";
|
|
return 0;
|
|
}
|
|
|
|
if (!intel_fbc_hw_tracking_covers_screen(plane_state)) {
|
|
plane_state->no_fbc_reason = "plane size too big";
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Work around a problem on GEN9+ HW, where enabling FBC on a plane
|
|
* having a Y offset that isn't divisible by 4 causes FIFO underrun
|
|
* and screen flicker.
|
|
*/
|
|
if (DISPLAY_VER(i915) >= 9 &&
|
|
plane_state->view.color_plane[0].y & 3) {
|
|
plane_state->no_fbc_reason = "plane start Y offset misaligned";
|
|
return 0;
|
|
}
|
|
|
|
/* Wa_22010751166: icl, ehl, tgl, dg1, rkl */
|
|
if (DISPLAY_VER(i915) >= 11 &&
|
|
(plane_state->view.color_plane[0].y +
|
|
(drm_rect_height(&plane_state->uapi.src) >> 16)) & 3) {
|
|
plane_state->no_fbc_reason = "plane end Y offset misaligned";
|
|
return 0;
|
|
}
|
|
|
|
/* WaFbcExceedCdClockThreshold:hsw,bdw */
|
|
if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
|
|
const struct intel_cdclk_state *cdclk_state;
|
|
|
|
cdclk_state = intel_atomic_get_cdclk_state(state);
|
|
if (IS_ERR(cdclk_state))
|
|
return PTR_ERR(cdclk_state);
|
|
|
|
if (crtc_state->pixel_rate >= cdclk_state->logical.cdclk * 95 / 100) {
|
|
plane_state->no_fbc_reason = "pixel rate too high";
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
plane_state->no_fbc_reason = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static bool intel_fbc_can_flip_nuke(struct intel_atomic_state *state,
|
|
struct intel_crtc *crtc,
|
|
struct intel_plane *plane)
|
|
{
|
|
const struct intel_crtc_state *new_crtc_state =
|
|
intel_atomic_get_new_crtc_state(state, crtc);
|
|
const struct intel_plane_state *old_plane_state =
|
|
intel_atomic_get_old_plane_state(state, plane);
|
|
const struct intel_plane_state *new_plane_state =
|
|
intel_atomic_get_new_plane_state(state, plane);
|
|
const struct drm_framebuffer *old_fb = old_plane_state->hw.fb;
|
|
const struct drm_framebuffer *new_fb = new_plane_state->hw.fb;
|
|
|
|
if (intel_crtc_needs_modeset(new_crtc_state))
|
|
return false;
|
|
|
|
if (!intel_fbc_is_ok(old_plane_state) ||
|
|
!intel_fbc_is_ok(new_plane_state))
|
|
return false;
|
|
|
|
if (old_fb->format->format != new_fb->format->format)
|
|
return false;
|
|
|
|
if (old_fb->modifier != new_fb->modifier)
|
|
return false;
|
|
|
|
if (intel_fbc_plane_stride(old_plane_state) !=
|
|
intel_fbc_plane_stride(new_plane_state))
|
|
return false;
|
|
|
|
if (intel_fbc_cfb_stride(old_plane_state) !=
|
|
intel_fbc_cfb_stride(new_plane_state))
|
|
return false;
|
|
|
|
if (intel_fbc_cfb_size(old_plane_state) !=
|
|
intel_fbc_cfb_size(new_plane_state))
|
|
return false;
|
|
|
|
if (intel_fbc_override_cfb_stride(old_plane_state) !=
|
|
intel_fbc_override_cfb_stride(new_plane_state))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool __intel_fbc_pre_update(struct intel_atomic_state *state,
|
|
struct intel_crtc *crtc,
|
|
struct intel_plane *plane)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(state->base.dev);
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
bool need_vblank_wait = false;
|
|
|
|
lockdep_assert_held(&fbc->lock);
|
|
|
|
fbc->flip_pending = true;
|
|
|
|
if (intel_fbc_can_flip_nuke(state, crtc, plane))
|
|
return need_vblank_wait;
|
|
|
|
intel_fbc_deactivate(fbc, "update pending");
|
|
|
|
/*
|
|
* Display WA #1198: glk+
|
|
* Need an extra vblank wait between FBC disable and most plane
|
|
* updates. Bspec says this is only needed for plane disable, but
|
|
* that is not true. Touching most plane registers will cause the
|
|
* corruption to appear. Also SKL/derivatives do not seem to be
|
|
* affected.
|
|
*
|
|
* TODO: could optimize this a bit by sampling the frame
|
|
* counter when we disable FBC (if it was already done earlier)
|
|
* and skipping the extra vblank wait before the plane update
|
|
* if at least one frame has already passed.
|
|
*/
|
|
if (fbc->activated && DISPLAY_VER(i915) >= 10)
|
|
need_vblank_wait = true;
|
|
fbc->activated = false;
|
|
|
|
return need_vblank_wait;
|
|
}
|
|
|
|
bool intel_fbc_pre_update(struct intel_atomic_state *state,
|
|
struct intel_crtc *crtc)
|
|
{
|
|
const struct intel_plane_state *plane_state;
|
|
bool need_vblank_wait = false;
|
|
struct intel_plane *plane;
|
|
int i;
|
|
|
|
for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
|
|
if (!fbc || plane->pipe != crtc->pipe)
|
|
continue;
|
|
|
|
mutex_lock(&fbc->lock);
|
|
|
|
if (fbc->state.plane == plane)
|
|
need_vblank_wait |= __intel_fbc_pre_update(state, crtc, plane);
|
|
|
|
mutex_unlock(&fbc->lock);
|
|
}
|
|
|
|
return need_vblank_wait;
|
|
}
|
|
|
|
static void __intel_fbc_disable(struct intel_fbc *fbc)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
struct intel_plane *plane = fbc->state.plane;
|
|
|
|
lockdep_assert_held(&fbc->lock);
|
|
drm_WARN_ON(&i915->drm, fbc->active);
|
|
|
|
drm_dbg_kms(&i915->drm, "Disabling FBC on [PLANE:%d:%s]\n",
|
|
plane->base.base.id, plane->base.name);
|
|
|
|
__intel_fbc_cleanup_cfb(fbc);
|
|
|
|
fbc->state.plane = NULL;
|
|
fbc->flip_pending = false;
|
|
fbc->busy_bits = 0;
|
|
}
|
|
|
|
static void __intel_fbc_post_update(struct intel_fbc *fbc)
|
|
{
|
|
lockdep_assert_held(&fbc->lock);
|
|
|
|
fbc->flip_pending = false;
|
|
|
|
if (!fbc->busy_bits)
|
|
intel_fbc_activate(fbc);
|
|
else
|
|
intel_fbc_deactivate(fbc, "frontbuffer write");
|
|
}
|
|
|
|
void intel_fbc_post_update(struct intel_atomic_state *state,
|
|
struct intel_crtc *crtc)
|
|
{
|
|
const struct intel_plane_state *plane_state;
|
|
struct intel_plane *plane;
|
|
int i;
|
|
|
|
for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
|
|
if (!fbc || plane->pipe != crtc->pipe)
|
|
continue;
|
|
|
|
mutex_lock(&fbc->lock);
|
|
|
|
if (fbc->state.plane == plane)
|
|
__intel_fbc_post_update(fbc);
|
|
|
|
mutex_unlock(&fbc->lock);
|
|
}
|
|
}
|
|
|
|
static unsigned int intel_fbc_get_frontbuffer_bit(struct intel_fbc *fbc)
|
|
{
|
|
if (fbc->state.plane)
|
|
return fbc->state.plane->frontbuffer_bit;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static void __intel_fbc_invalidate(struct intel_fbc *fbc,
|
|
unsigned int frontbuffer_bits,
|
|
enum fb_op_origin origin)
|
|
{
|
|
if (origin == ORIGIN_FLIP || origin == ORIGIN_CURSOR_UPDATE)
|
|
return;
|
|
|
|
mutex_lock(&fbc->lock);
|
|
|
|
frontbuffer_bits &= intel_fbc_get_frontbuffer_bit(fbc);
|
|
if (!frontbuffer_bits)
|
|
goto out;
|
|
|
|
fbc->busy_bits |= frontbuffer_bits;
|
|
intel_fbc_deactivate(fbc, "frontbuffer write");
|
|
|
|
out:
|
|
mutex_unlock(&fbc->lock);
|
|
}
|
|
|
|
void intel_fbc_invalidate(struct drm_i915_private *i915,
|
|
unsigned int frontbuffer_bits,
|
|
enum fb_op_origin origin)
|
|
{
|
|
struct intel_fbc *fbc;
|
|
enum intel_fbc_id fbc_id;
|
|
|
|
for_each_intel_fbc(i915, fbc, fbc_id)
|
|
__intel_fbc_invalidate(fbc, frontbuffer_bits, origin);
|
|
|
|
}
|
|
|
|
static void __intel_fbc_flush(struct intel_fbc *fbc,
|
|
unsigned int frontbuffer_bits,
|
|
enum fb_op_origin origin)
|
|
{
|
|
mutex_lock(&fbc->lock);
|
|
|
|
frontbuffer_bits &= intel_fbc_get_frontbuffer_bit(fbc);
|
|
if (!frontbuffer_bits)
|
|
goto out;
|
|
|
|
fbc->busy_bits &= ~frontbuffer_bits;
|
|
|
|
if (origin == ORIGIN_FLIP || origin == ORIGIN_CURSOR_UPDATE)
|
|
goto out;
|
|
|
|
if (fbc->busy_bits || fbc->flip_pending)
|
|
goto out;
|
|
|
|
if (fbc->active)
|
|
intel_fbc_nuke(fbc);
|
|
else
|
|
intel_fbc_activate(fbc);
|
|
|
|
out:
|
|
mutex_unlock(&fbc->lock);
|
|
}
|
|
|
|
void intel_fbc_flush(struct drm_i915_private *i915,
|
|
unsigned int frontbuffer_bits,
|
|
enum fb_op_origin origin)
|
|
{
|
|
struct intel_fbc *fbc;
|
|
enum intel_fbc_id fbc_id;
|
|
|
|
for_each_intel_fbc(i915, fbc, fbc_id)
|
|
__intel_fbc_flush(fbc, frontbuffer_bits, origin);
|
|
}
|
|
|
|
int intel_fbc_atomic_check(struct intel_atomic_state *state)
|
|
{
|
|
struct intel_plane_state *plane_state;
|
|
struct intel_plane *plane;
|
|
int i;
|
|
|
|
for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
|
|
int ret;
|
|
|
|
ret = intel_fbc_check_plane(state, plane);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __intel_fbc_enable(struct intel_atomic_state *state,
|
|
struct intel_crtc *crtc,
|
|
struct intel_plane *plane)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(state->base.dev);
|
|
const struct intel_plane_state *plane_state =
|
|
intel_atomic_get_new_plane_state(state, plane);
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
|
|
lockdep_assert_held(&fbc->lock);
|
|
|
|
if (fbc->state.plane) {
|
|
if (fbc->state.plane != plane)
|
|
return;
|
|
|
|
if (intel_fbc_is_ok(plane_state)) {
|
|
intel_fbc_update_state(state, crtc, plane);
|
|
return;
|
|
}
|
|
|
|
__intel_fbc_disable(fbc);
|
|
}
|
|
|
|
drm_WARN_ON(&i915->drm, fbc->active);
|
|
|
|
fbc->no_fbc_reason = plane_state->no_fbc_reason;
|
|
if (fbc->no_fbc_reason)
|
|
return;
|
|
|
|
if (!intel_fbc_is_fence_ok(plane_state)) {
|
|
fbc->no_fbc_reason = "framebuffer not fenced";
|
|
return;
|
|
}
|
|
|
|
if (fbc->underrun_detected) {
|
|
fbc->no_fbc_reason = "FIFO underrun";
|
|
return;
|
|
}
|
|
|
|
if (intel_fbc_alloc_cfb(fbc, intel_fbc_cfb_size(plane_state),
|
|
intel_fbc_min_limit(plane_state))) {
|
|
fbc->no_fbc_reason = "not enough stolen memory";
|
|
return;
|
|
}
|
|
|
|
drm_dbg_kms(&i915->drm, "Enabling FBC on [PLANE:%d:%s]\n",
|
|
plane->base.base.id, plane->base.name);
|
|
fbc->no_fbc_reason = "FBC enabled but not active yet\n";
|
|
|
|
intel_fbc_update_state(state, crtc, plane);
|
|
|
|
intel_fbc_program_workarounds(fbc);
|
|
intel_fbc_program_cfb(fbc);
|
|
}
|
|
|
|
/**
|
|
* intel_fbc_disable - disable FBC if it's associated with crtc
|
|
* @crtc: the CRTC
|
|
*
|
|
* This function disables FBC if it's associated with the provided CRTC.
|
|
*/
|
|
void intel_fbc_disable(struct intel_crtc *crtc)
|
|
{
|
|
struct drm_i915_private *i915 = to_i915(crtc->base.dev);
|
|
struct intel_plane *plane;
|
|
|
|
for_each_intel_plane(&i915->drm, plane) {
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
|
|
if (!fbc || plane->pipe != crtc->pipe)
|
|
continue;
|
|
|
|
mutex_lock(&fbc->lock);
|
|
if (fbc->state.plane == plane)
|
|
__intel_fbc_disable(fbc);
|
|
mutex_unlock(&fbc->lock);
|
|
}
|
|
}
|
|
|
|
void intel_fbc_update(struct intel_atomic_state *state,
|
|
struct intel_crtc *crtc)
|
|
{
|
|
const struct intel_crtc_state *crtc_state =
|
|
intel_atomic_get_new_crtc_state(state, crtc);
|
|
const struct intel_plane_state *plane_state;
|
|
struct intel_plane *plane;
|
|
int i;
|
|
|
|
for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
|
|
struct intel_fbc *fbc = plane->fbc;
|
|
|
|
if (!fbc || plane->pipe != crtc->pipe)
|
|
continue;
|
|
|
|
mutex_lock(&fbc->lock);
|
|
|
|
if (intel_crtc_needs_fastset(crtc_state) &&
|
|
plane_state->no_fbc_reason) {
|
|
if (fbc->state.plane == plane)
|
|
__intel_fbc_disable(fbc);
|
|
} else {
|
|
__intel_fbc_enable(state, crtc, plane);
|
|
}
|
|
|
|
mutex_unlock(&fbc->lock);
|
|
}
|
|
}
|
|
|
|
static void intel_fbc_underrun_work_fn(struct work_struct *work)
|
|
{
|
|
struct intel_fbc *fbc = container_of(work, typeof(*fbc), underrun_work);
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
|
|
mutex_lock(&fbc->lock);
|
|
|
|
/* Maybe we were scheduled twice. */
|
|
if (fbc->underrun_detected || !fbc->state.plane)
|
|
goto out;
|
|
|
|
drm_dbg_kms(&i915->drm, "Disabling FBC due to FIFO underrun.\n");
|
|
fbc->underrun_detected = true;
|
|
|
|
intel_fbc_deactivate(fbc, "FIFO underrun");
|
|
if (!fbc->flip_pending)
|
|
intel_crtc_wait_for_next_vblank(intel_crtc_for_pipe(i915, fbc->state.plane->pipe));
|
|
__intel_fbc_disable(fbc);
|
|
out:
|
|
mutex_unlock(&fbc->lock);
|
|
}
|
|
|
|
static void __intel_fbc_reset_underrun(struct intel_fbc *fbc)
|
|
{
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
|
|
cancel_work_sync(&fbc->underrun_work);
|
|
|
|
mutex_lock(&fbc->lock);
|
|
|
|
if (fbc->underrun_detected) {
|
|
drm_dbg_kms(&i915->drm,
|
|
"Re-allowing FBC after fifo underrun\n");
|
|
fbc->no_fbc_reason = "FIFO underrun cleared";
|
|
}
|
|
|
|
fbc->underrun_detected = false;
|
|
mutex_unlock(&fbc->lock);
|
|
}
|
|
|
|
/*
|
|
* intel_fbc_reset_underrun - reset FBC fifo underrun status.
|
|
* @i915: the i915 device
|
|
*
|
|
* See intel_fbc_handle_fifo_underrun_irq(). For automated testing we
|
|
* want to re-enable FBC after an underrun to increase test coverage.
|
|
*/
|
|
void intel_fbc_reset_underrun(struct drm_i915_private *i915)
|
|
{
|
|
struct intel_fbc *fbc;
|
|
enum intel_fbc_id fbc_id;
|
|
|
|
for_each_intel_fbc(i915, fbc, fbc_id)
|
|
__intel_fbc_reset_underrun(fbc);
|
|
}
|
|
|
|
static void __intel_fbc_handle_fifo_underrun_irq(struct intel_fbc *fbc)
|
|
{
|
|
/*
|
|
* There's no guarantee that underrun_detected won't be set to true
|
|
* right after this check and before the work is scheduled, but that's
|
|
* not a problem since we'll check it again under the work function
|
|
* while FBC is locked. This check here is just to prevent us from
|
|
* unnecessarily scheduling the work, and it relies on the fact that we
|
|
* never switch underrun_detect back to false after it's true.
|
|
*/
|
|
if (READ_ONCE(fbc->underrun_detected))
|
|
return;
|
|
|
|
schedule_work(&fbc->underrun_work);
|
|
}
|
|
|
|
/**
|
|
* intel_fbc_handle_fifo_underrun_irq - disable FBC when we get a FIFO underrun
|
|
* @i915: i915 device
|
|
*
|
|
* Without FBC, most underruns are harmless and don't really cause too many
|
|
* problems, except for an annoying message on dmesg. With FBC, underruns can
|
|
* become black screens or even worse, especially when paired with bad
|
|
* watermarks. So in order for us to be on the safe side, completely disable FBC
|
|
* in case we ever detect a FIFO underrun on any pipe. An underrun on any pipe
|
|
* already suggests that watermarks may be bad, so try to be as safe as
|
|
* possible.
|
|
*
|
|
* This function is called from the IRQ handler.
|
|
*/
|
|
void intel_fbc_handle_fifo_underrun_irq(struct drm_i915_private *i915)
|
|
{
|
|
struct intel_fbc *fbc;
|
|
enum intel_fbc_id fbc_id;
|
|
|
|
for_each_intel_fbc(i915, fbc, fbc_id)
|
|
__intel_fbc_handle_fifo_underrun_irq(fbc);
|
|
}
|
|
|
|
/*
|
|
* The DDX driver changes its behavior depending on the value it reads from
|
|
* i915.enable_fbc, so sanitize it by translating the default value into either
|
|
* 0 or 1 in order to allow it to know what's going on.
|
|
*
|
|
* Notice that this is done at driver initialization and we still allow user
|
|
* space to change the value during runtime without sanitizing it again. IGT
|
|
* relies on being able to change i915.enable_fbc at runtime.
|
|
*/
|
|
static int intel_sanitize_fbc_option(struct drm_i915_private *i915)
|
|
{
|
|
if (i915->params.enable_fbc >= 0)
|
|
return !!i915->params.enable_fbc;
|
|
|
|
if (!HAS_FBC(i915))
|
|
return 0;
|
|
|
|
if (IS_BROADWELL(i915) || DISPLAY_VER(i915) >= 9)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool need_fbc_vtd_wa(struct drm_i915_private *i915)
|
|
{
|
|
/* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
|
|
if (i915_vtd_active(i915) &&
|
|
(IS_SKYLAKE(i915) || IS_BROXTON(i915))) {
|
|
drm_info(&i915->drm,
|
|
"Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n");
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void intel_fbc_add_plane(struct intel_fbc *fbc, struct intel_plane *plane)
|
|
{
|
|
plane->fbc = fbc;
|
|
}
|
|
|
|
static struct intel_fbc *intel_fbc_create(struct drm_i915_private *i915,
|
|
enum intel_fbc_id fbc_id)
|
|
{
|
|
struct intel_fbc *fbc;
|
|
|
|
fbc = kzalloc(sizeof(*fbc), GFP_KERNEL);
|
|
if (!fbc)
|
|
return NULL;
|
|
|
|
fbc->id = fbc_id;
|
|
fbc->i915 = i915;
|
|
INIT_WORK(&fbc->underrun_work, intel_fbc_underrun_work_fn);
|
|
mutex_init(&fbc->lock);
|
|
|
|
if (DISPLAY_VER(i915) >= 7)
|
|
fbc->funcs = &ivb_fbc_funcs;
|
|
else if (DISPLAY_VER(i915) == 6)
|
|
fbc->funcs = &snb_fbc_funcs;
|
|
else if (DISPLAY_VER(i915) == 5)
|
|
fbc->funcs = &ilk_fbc_funcs;
|
|
else if (IS_G4X(i915))
|
|
fbc->funcs = &g4x_fbc_funcs;
|
|
else if (DISPLAY_VER(i915) == 4)
|
|
fbc->funcs = &i965_fbc_funcs;
|
|
else
|
|
fbc->funcs = &i8xx_fbc_funcs;
|
|
|
|
return fbc;
|
|
}
|
|
|
|
/**
|
|
* intel_fbc_init - Initialize FBC
|
|
* @i915: the i915 device
|
|
*
|
|
* This function might be called during PM init process.
|
|
*/
|
|
void intel_fbc_init(struct drm_i915_private *i915)
|
|
{
|
|
enum intel_fbc_id fbc_id;
|
|
|
|
if (!drm_mm_initialized(&i915->mm.stolen))
|
|
RUNTIME_INFO(i915)->fbc_mask = 0;
|
|
|
|
if (need_fbc_vtd_wa(i915))
|
|
RUNTIME_INFO(i915)->fbc_mask = 0;
|
|
|
|
i915->params.enable_fbc = intel_sanitize_fbc_option(i915);
|
|
drm_dbg_kms(&i915->drm, "Sanitized enable_fbc value: %d\n",
|
|
i915->params.enable_fbc);
|
|
|
|
for_each_fbc_id(i915, fbc_id)
|
|
i915->display.fbc[fbc_id] = intel_fbc_create(i915, fbc_id);
|
|
}
|
|
|
|
/**
|
|
* intel_fbc_sanitize - Sanitize FBC
|
|
* @i915: the i915 device
|
|
*
|
|
* Make sure FBC is initially disabled since we have no
|
|
* idea eg. into which parts of stolen it might be scribbling
|
|
* into.
|
|
*/
|
|
void intel_fbc_sanitize(struct drm_i915_private *i915)
|
|
{
|
|
struct intel_fbc *fbc;
|
|
enum intel_fbc_id fbc_id;
|
|
|
|
for_each_intel_fbc(i915, fbc, fbc_id) {
|
|
if (intel_fbc_hw_is_active(fbc))
|
|
intel_fbc_hw_deactivate(fbc);
|
|
}
|
|
}
|
|
|
|
static int intel_fbc_debugfs_status_show(struct seq_file *m, void *unused)
|
|
{
|
|
struct intel_fbc *fbc = m->private;
|
|
struct drm_i915_private *i915 = fbc->i915;
|
|
struct intel_plane *plane;
|
|
intel_wakeref_t wakeref;
|
|
|
|
drm_modeset_lock_all(&i915->drm);
|
|
|
|
wakeref = intel_runtime_pm_get(&i915->runtime_pm);
|
|
mutex_lock(&fbc->lock);
|
|
|
|
if (fbc->active) {
|
|
seq_puts(m, "FBC enabled\n");
|
|
seq_printf(m, "Compressing: %s\n",
|
|
str_yes_no(intel_fbc_is_compressing(fbc)));
|
|
} else {
|
|
seq_printf(m, "FBC disabled: %s\n", fbc->no_fbc_reason);
|
|
}
|
|
|
|
for_each_intel_plane(&i915->drm, plane) {
|
|
const struct intel_plane_state *plane_state =
|
|
to_intel_plane_state(plane->base.state);
|
|
|
|
if (plane->fbc != fbc)
|
|
continue;
|
|
|
|
seq_printf(m, "%c [PLANE:%d:%s]: %s\n",
|
|
fbc->state.plane == plane ? '*' : ' ',
|
|
plane->base.base.id, plane->base.name,
|
|
plane_state->no_fbc_reason ?: "FBC possible");
|
|
}
|
|
|
|
mutex_unlock(&fbc->lock);
|
|
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
|
|
|
|
drm_modeset_unlock_all(&i915->drm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(intel_fbc_debugfs_status);
|
|
|
|
static int intel_fbc_debugfs_false_color_get(void *data, u64 *val)
|
|
{
|
|
struct intel_fbc *fbc = data;
|
|
|
|
*val = fbc->false_color;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_fbc_debugfs_false_color_set(void *data, u64 val)
|
|
{
|
|
struct intel_fbc *fbc = data;
|
|
|
|
mutex_lock(&fbc->lock);
|
|
|
|
fbc->false_color = val;
|
|
|
|
if (fbc->active)
|
|
fbc->funcs->set_false_color(fbc, fbc->false_color);
|
|
|
|
mutex_unlock(&fbc->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(intel_fbc_debugfs_false_color_fops,
|
|
intel_fbc_debugfs_false_color_get,
|
|
intel_fbc_debugfs_false_color_set,
|
|
"%llu\n");
|
|
|
|
static void intel_fbc_debugfs_add(struct intel_fbc *fbc,
|
|
struct dentry *parent)
|
|
{
|
|
debugfs_create_file("i915_fbc_status", 0444, parent,
|
|
fbc, &intel_fbc_debugfs_status_fops);
|
|
|
|
if (fbc->funcs->set_false_color)
|
|
debugfs_create_file_unsafe("i915_fbc_false_color", 0644, parent,
|
|
fbc, &intel_fbc_debugfs_false_color_fops);
|
|
}
|
|
|
|
void intel_fbc_crtc_debugfs_add(struct intel_crtc *crtc)
|
|
{
|
|
struct intel_plane *plane = to_intel_plane(crtc->base.primary);
|
|
|
|
if (plane->fbc)
|
|
intel_fbc_debugfs_add(plane->fbc, crtc->base.debugfs_entry);
|
|
}
|
|
|
|
/* FIXME: remove this once igt is on board with per-crtc stuff */
|
|
void intel_fbc_debugfs_register(struct drm_i915_private *i915)
|
|
{
|
|
struct drm_minor *minor = i915->drm.primary;
|
|
struct intel_fbc *fbc;
|
|
|
|
fbc = i915->display.fbc[INTEL_FBC_A];
|
|
if (fbc)
|
|
intel_fbc_debugfs_add(fbc, minor->debugfs_root);
|
|
}
|