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linux-zen-server/drivers/gpu/drm/i915/display/intel_dmc.c

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/*
* Copyright © 2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
*/
#include <linux/firmware.h>
#include "i915_drv.h"
#include "i915_reg.h"
#include "intel_de.h"
#include "intel_dmc.h"
#include "intel_dmc_regs.h"
/**
* DOC: DMC Firmware Support
*
* From gen9 onwards we have newly added DMC (Display microcontroller) in display
* engine to save and restore the state of display engine when it enter into
* low-power state and comes back to normal.
*/
#define DMC_VERSION(major, minor) ((major) << 16 | (minor))
#define DMC_VERSION_MAJOR(version) ((version) >> 16)
#define DMC_VERSION_MINOR(version) ((version) & 0xffff)
#define DMC_PATH(platform) \
"i915/" __stringify(platform) "_dmc.bin"
/*
* New DMC additions should not use this. This is used solely to remain
* compatible with systems that have not yet updated DMC blobs to use
* unversioned file names.
*/
#define DMC_LEGACY_PATH(platform, major, minor) \
"i915/" \
__stringify(platform) "_dmc_ver" \
__stringify(major) "_" \
__stringify(minor) ".bin"
#define DISPLAY_VER13_DMC_MAX_FW_SIZE 0x20000
#define DISPLAY_VER12_DMC_MAX_FW_SIZE ICL_DMC_MAX_FW_SIZE
#define DG2_DMC_PATH DMC_LEGACY_PATH(dg2, 2, 08)
MODULE_FIRMWARE(DG2_DMC_PATH);
#define ADLP_DMC_PATH DMC_PATH(adlp)
#define ADLP_DMC_FALLBACK_PATH DMC_LEGACY_PATH(adlp, 2, 16)
MODULE_FIRMWARE(ADLP_DMC_PATH);
MODULE_FIRMWARE(ADLP_DMC_FALLBACK_PATH);
#define ADLS_DMC_PATH DMC_LEGACY_PATH(adls, 2, 01)
MODULE_FIRMWARE(ADLS_DMC_PATH);
#define DG1_DMC_PATH DMC_LEGACY_PATH(dg1, 2, 02)
MODULE_FIRMWARE(DG1_DMC_PATH);
#define RKL_DMC_PATH DMC_LEGACY_PATH(rkl, 2, 03)
MODULE_FIRMWARE(RKL_DMC_PATH);
#define TGL_DMC_PATH DMC_LEGACY_PATH(tgl, 2, 12)
MODULE_FIRMWARE(TGL_DMC_PATH);
#define ICL_DMC_PATH DMC_LEGACY_PATH(icl, 1, 09)
#define ICL_DMC_MAX_FW_SIZE 0x6000
MODULE_FIRMWARE(ICL_DMC_PATH);
#define GLK_DMC_PATH DMC_LEGACY_PATH(glk, 1, 04)
#define GLK_DMC_MAX_FW_SIZE 0x4000
MODULE_FIRMWARE(GLK_DMC_PATH);
#define KBL_DMC_PATH DMC_LEGACY_PATH(kbl, 1, 04)
#define KBL_DMC_MAX_FW_SIZE BXT_DMC_MAX_FW_SIZE
MODULE_FIRMWARE(KBL_DMC_PATH);
#define SKL_DMC_PATH DMC_LEGACY_PATH(skl, 1, 27)
#define SKL_DMC_MAX_FW_SIZE BXT_DMC_MAX_FW_SIZE
MODULE_FIRMWARE(SKL_DMC_PATH);
#define BXT_DMC_PATH DMC_LEGACY_PATH(bxt, 1, 07)
#define BXT_DMC_MAX_FW_SIZE 0x3000
MODULE_FIRMWARE(BXT_DMC_PATH);
#define DMC_DEFAULT_FW_OFFSET 0xFFFFFFFF
#define PACKAGE_MAX_FW_INFO_ENTRIES 20
#define PACKAGE_V2_MAX_FW_INFO_ENTRIES 32
#define DMC_V1_MAX_MMIO_COUNT 8
#define DMC_V3_MAX_MMIO_COUNT 20
#define DMC_V1_MMIO_START_RANGE 0x80000
#define PIPE_TO_DMC_ID(pipe) (DMC_FW_PIPEA + ((pipe) - PIPE_A))
struct intel_css_header {
/* 0x09 for DMC */
u32 module_type;
/* Includes the DMC specific header in dwords */
u32 header_len;
/* always value would be 0x10000 */
u32 header_ver;
/* Not used */
u32 module_id;
/* Not used */
u32 module_vendor;
/* in YYYYMMDD format */
u32 date;
/* Size in dwords (CSS_Headerlen + PackageHeaderLen + dmc FWsLen)/4 */
u32 size;
/* Not used */
u32 key_size;
/* Not used */
u32 modulus_size;
/* Not used */
u32 exponent_size;
/* Not used */
u32 reserved1[12];
/* Major Minor */
u32 version;
/* Not used */
u32 reserved2[8];
/* Not used */
u32 kernel_header_info;
} __packed;
struct intel_fw_info {
u8 reserved1;
/* reserved on package_header version 1, must be 0 on version 2 */
u8 dmc_id;
/* Stepping (A, B, C, ..., *). * is a wildcard */
char stepping;
/* Sub-stepping (0, 1, ..., *). * is a wildcard */
char substepping;
u32 offset;
u32 reserved2;
} __packed;
struct intel_package_header {
/* DMC container header length in dwords */
u8 header_len;
/* 0x01, 0x02 */
u8 header_ver;
u8 reserved[10];
/* Number of valid entries in the FWInfo array below */
u32 num_entries;
} __packed;
struct intel_dmc_header_base {
/* always value would be 0x40403E3E */
u32 signature;
/* DMC binary header length */
u8 header_len;
/* 0x01 */
u8 header_ver;
/* Reserved */
u16 dmcc_ver;
/* Major, Minor */
u32 project;
/* Firmware program size (excluding header) in dwords */
u32 fw_size;
/* Major Minor version */
u32 fw_version;
} __packed;
struct intel_dmc_header_v1 {
struct intel_dmc_header_base base;
/* Number of valid MMIO cycles present. */
u32 mmio_count;
/* MMIO address */
u32 mmioaddr[DMC_V1_MAX_MMIO_COUNT];
/* MMIO data */
u32 mmiodata[DMC_V1_MAX_MMIO_COUNT];
/* FW filename */
char dfile[32];
u32 reserved1[2];
} __packed;
struct intel_dmc_header_v3 {
struct intel_dmc_header_base base;
/* DMC RAM start MMIO address */
u32 start_mmioaddr;
u32 reserved[9];
/* FW filename */
char dfile[32];
/* Number of valid MMIO cycles present. */
u32 mmio_count;
/* MMIO address */
u32 mmioaddr[DMC_V3_MAX_MMIO_COUNT];
/* MMIO data */
u32 mmiodata[DMC_V3_MAX_MMIO_COUNT];
} __packed;
struct stepping_info {
char stepping;
char substepping;
};
static bool has_dmc_id_fw(struct drm_i915_private *i915, int dmc_id)
{
return i915->display.dmc.dmc_info[dmc_id].payload;
}
bool intel_dmc_has_payload(struct drm_i915_private *i915)
{
return has_dmc_id_fw(i915, DMC_FW_MAIN);
}
static const struct stepping_info *
intel_get_stepping_info(struct drm_i915_private *i915,
struct stepping_info *si)
{
const char *step_name = intel_step_name(RUNTIME_INFO(i915)->step.display_step);
si->stepping = step_name[0];
si->substepping = step_name[1];
return si;
}
static void gen9_set_dc_state_debugmask(struct drm_i915_private *dev_priv)
{
/* The below bit doesn't need to be cleared ever afterwards */
intel_de_rmw(dev_priv, DC_STATE_DEBUG, 0,
DC_STATE_DEBUG_MASK_CORES | DC_STATE_DEBUG_MASK_MEMORY_UP);
intel_de_posting_read(dev_priv, DC_STATE_DEBUG);
}
static void disable_event_handler(struct drm_i915_private *i915,
i915_reg_t ctl_reg, i915_reg_t htp_reg)
{
intel_de_write(i915, ctl_reg,
REG_FIELD_PREP(DMC_EVT_CTL_TYPE_MASK,
DMC_EVT_CTL_TYPE_EDGE_0_1) |
REG_FIELD_PREP(DMC_EVT_CTL_EVENT_ID_MASK,
DMC_EVT_CTL_EVENT_ID_FALSE));
intel_de_write(i915, htp_reg, 0);
}
static void
disable_flip_queue_event(struct drm_i915_private *i915,
i915_reg_t ctl_reg, i915_reg_t htp_reg)
{
u32 event_ctl;
u32 event_htp;
event_ctl = intel_de_read(i915, ctl_reg);
event_htp = intel_de_read(i915, htp_reg);
if (event_ctl != (DMC_EVT_CTL_ENABLE |
DMC_EVT_CTL_RECURRING |
REG_FIELD_PREP(DMC_EVT_CTL_TYPE_MASK,
DMC_EVT_CTL_TYPE_EDGE_0_1) |
REG_FIELD_PREP(DMC_EVT_CTL_EVENT_ID_MASK,
DMC_EVT_CTL_EVENT_ID_CLK_MSEC)) ||
!event_htp) {
drm_dbg_kms(&i915->drm,
"Unexpected DMC event configuration (control %08x htp %08x)\n",
event_ctl, event_htp);
return;
}
disable_event_handler(i915, ctl_reg, htp_reg);
}
static bool
get_flip_queue_event_regs(struct drm_i915_private *i915, int dmc_id,
i915_reg_t *ctl_reg, i915_reg_t *htp_reg)
{
switch (dmc_id) {
case DMC_FW_MAIN:
if (DISPLAY_VER(i915) == 12) {
*ctl_reg = DMC_EVT_CTL(i915, dmc_id, 3);
*htp_reg = DMC_EVT_HTP(i915, dmc_id, 3);
return true;
}
break;
case DMC_FW_PIPEA ... DMC_FW_PIPED:
if (IS_DG2(i915)) {
*ctl_reg = DMC_EVT_CTL(i915, dmc_id, 2);
*htp_reg = DMC_EVT_HTP(i915, dmc_id, 2);
return true;
}
break;
}
return false;
}
static void
disable_all_flip_queue_events(struct drm_i915_private *i915)
{
int dmc_id;
/* TODO: check if the following applies to all D13+ platforms. */
if (!IS_DG2(i915) && !IS_TIGERLAKE(i915))
return;
for (dmc_id = 0; dmc_id < DMC_FW_MAX; dmc_id++) {
i915_reg_t ctl_reg;
i915_reg_t htp_reg;
if (!has_dmc_id_fw(i915, dmc_id))
continue;
if (!get_flip_queue_event_regs(i915, dmc_id, &ctl_reg, &htp_reg))
continue;
disable_flip_queue_event(i915, ctl_reg, htp_reg);
}
}
static void disable_all_event_handlers(struct drm_i915_private *i915)
{
int id;
/* TODO: disable the event handlers on pre-GEN12 platforms as well */
if (DISPLAY_VER(i915) < 12)
return;
for (id = DMC_FW_MAIN; id < DMC_FW_MAX; id++) {
int handler;
if (!has_dmc_id_fw(i915, id))
continue;
for (handler = 0; handler < DMC_EVENT_HANDLER_COUNT_GEN12; handler++)
disable_event_handler(i915,
DMC_EVT_CTL(i915, id, handler),
DMC_EVT_HTP(i915, id, handler));
}
}
static void adlp_pipedmc_clock_gating_wa(struct drm_i915_private *i915, bool enable)
{
enum pipe pipe;
/*
* Wa_16015201720:adl-p,dg2
* The WA requires clock gating to be disabled all the time
* for pipe A and B.
* For pipe C and D clock gating needs to be disabled only
* during initializing the firmware.
*/
if (enable)
for (pipe = PIPE_A; pipe <= PIPE_D; pipe++)
intel_de_rmw(i915, CLKGATE_DIS_PSL_EXT(pipe),
0, PIPEDMC_GATING_DIS);
else
for (pipe = PIPE_C; pipe <= PIPE_D; pipe++)
intel_de_rmw(i915, CLKGATE_DIS_PSL_EXT(pipe),
PIPEDMC_GATING_DIS, 0);
}
static void mtl_pipedmc_clock_gating_wa(struct drm_i915_private *i915)
{
/*
* Wa_16015201720
* The WA requires clock gating to be disabled all the time
* for pipe A and B.
*/
intel_de_rmw(i915, GEN9_CLKGATE_DIS_0, 0,
MTL_PIPEDMC_GATING_DIS_A | MTL_PIPEDMC_GATING_DIS_B);
}
static void pipedmc_clock_gating_wa(struct drm_i915_private *i915, bool enable)
{
if (DISPLAY_VER(i915) >= 14 && enable)
mtl_pipedmc_clock_gating_wa(i915);
else if (DISPLAY_VER(i915) == 13)
adlp_pipedmc_clock_gating_wa(i915, enable);
}
void intel_dmc_enable_pipe(struct drm_i915_private *i915, enum pipe pipe)
{
if (!has_dmc_id_fw(i915, PIPE_TO_DMC_ID(pipe)))
return;
if (DISPLAY_VER(i915) >= 14)
intel_de_rmw(i915, MTL_PIPEDMC_CONTROL, 0, PIPEDMC_ENABLE_MTL(pipe));
else
intel_de_rmw(i915, PIPEDMC_CONTROL(pipe), 0, PIPEDMC_ENABLE);
}
void intel_dmc_disable_pipe(struct drm_i915_private *i915, enum pipe pipe)
{
if (!has_dmc_id_fw(i915, PIPE_TO_DMC_ID(pipe)))
return;
if (DISPLAY_VER(i915) >= 14)
intel_de_rmw(i915, MTL_PIPEDMC_CONTROL, PIPEDMC_ENABLE_MTL(pipe), 0);
else
intel_de_rmw(i915, PIPEDMC_CONTROL(pipe), PIPEDMC_ENABLE, 0);
}
/**
* intel_dmc_load_program() - write the firmware from memory to register.
* @dev_priv: i915 drm device.
*
* DMC firmware is read from a .bin file and kept in internal memory one time.
* Everytime display comes back from low power state this function is called to
* copy the firmware from internal memory to registers.
*/
void intel_dmc_load_program(struct drm_i915_private *dev_priv)
{
struct intel_dmc *dmc = &dev_priv->display.dmc;
u32 id, i;
if (!intel_dmc_has_payload(dev_priv))
return;
pipedmc_clock_gating_wa(dev_priv, true);
disable_all_event_handlers(dev_priv);
assert_rpm_wakelock_held(&dev_priv->runtime_pm);
preempt_disable();
for (id = 0; id < DMC_FW_MAX; id++) {
for (i = 0; i < dmc->dmc_info[id].dmc_fw_size; i++) {
intel_de_write_fw(dev_priv,
DMC_PROGRAM(dmc->dmc_info[id].start_mmioaddr, i),
dmc->dmc_info[id].payload[i]);
}
}
preempt_enable();
for (id = 0; id < DMC_FW_MAX; id++) {
for (i = 0; i < dmc->dmc_info[id].mmio_count; i++) {
intel_de_write(dev_priv, dmc->dmc_info[id].mmioaddr[i],
dmc->dmc_info[id].mmiodata[i]);
}
}
dev_priv->display.dmc.dc_state = 0;
gen9_set_dc_state_debugmask(dev_priv);
/*
* Flip queue events need to be disabled before enabling DC5/6.
* i915 doesn't use the flip queue feature, so disable it already
* here.
*/
disable_all_flip_queue_events(dev_priv);
pipedmc_clock_gating_wa(dev_priv, false);
}
/**
* intel_dmc_disable_program() - disable the firmware
* @i915: i915 drm device
*
* Disable all event handlers in the firmware, making sure the firmware is
* inactive after the display is uninitialized.
*/
void intel_dmc_disable_program(struct drm_i915_private *i915)
{
if (!intel_dmc_has_payload(i915))
return;
pipedmc_clock_gating_wa(i915, true);
disable_all_event_handlers(i915);
pipedmc_clock_gating_wa(i915, false);
}
void assert_dmc_loaded(struct drm_i915_private *i915)
{
drm_WARN_ONCE(&i915->drm,
!intel_de_read(i915, DMC_PROGRAM(i915->display.dmc.dmc_info[DMC_FW_MAIN].start_mmioaddr, 0)),
"DMC program storage start is NULL\n");
drm_WARN_ONCE(&i915->drm, !intel_de_read(i915, DMC_SSP_BASE),
"DMC SSP Base Not fine\n");
drm_WARN_ONCE(&i915->drm, !intel_de_read(i915, DMC_HTP_SKL),
"DMC HTP Not fine\n");
}
static bool fw_info_matches_stepping(const struct intel_fw_info *fw_info,
const struct stepping_info *si)
{
if ((fw_info->substepping == '*' && si->stepping == fw_info->stepping) ||
(si->stepping == fw_info->stepping && si->substepping == fw_info->substepping) ||
/*
* If we don't find a more specific one from above two checks, we
* then check for the generic one to be sure to work even with
* "broken firmware"
*/
(si->stepping == '*' && si->substepping == fw_info->substepping) ||
(fw_info->stepping == '*' && fw_info->substepping == '*'))
return true;
return false;
}
/*
* Search fw_info table for dmc_offset to find firmware binary: num_entries is
* already sanitized.
*/
static void dmc_set_fw_offset(struct intel_dmc *dmc,
const struct intel_fw_info *fw_info,
unsigned int num_entries,
const struct stepping_info *si,
u8 package_ver)
{
unsigned int i, id;
struct drm_i915_private *i915 = container_of(dmc, typeof(*i915), display.dmc);
for (i = 0; i < num_entries; i++) {
id = package_ver <= 1 ? DMC_FW_MAIN : fw_info[i].dmc_id;
if (id >= DMC_FW_MAX) {
drm_dbg(&i915->drm, "Unsupported firmware id: %u\n", id);
continue;
}
/* More specific versions come first, so we don't even have to
* check for the stepping since we already found a previous FW
* for this id.
*/
if (dmc->dmc_info[id].present)
continue;
if (fw_info_matches_stepping(&fw_info[i], si)) {
dmc->dmc_info[id].present = true;
dmc->dmc_info[id].dmc_offset = fw_info[i].offset;
}
}
}
static bool dmc_mmio_addr_sanity_check(struct intel_dmc *dmc,
const u32 *mmioaddr, u32 mmio_count,
int header_ver, u8 dmc_id)
{
struct drm_i915_private *i915 = container_of(dmc, typeof(*i915), display.dmc);
u32 start_range, end_range;
int i;
if (dmc_id >= DMC_FW_MAX) {
drm_warn(&i915->drm, "Unsupported firmware id %u\n", dmc_id);
return false;
}
if (header_ver == 1) {
start_range = DMC_MMIO_START_RANGE;
end_range = DMC_MMIO_END_RANGE;
} else if (dmc_id == DMC_FW_MAIN) {
start_range = TGL_MAIN_MMIO_START;
end_range = TGL_MAIN_MMIO_END;
} else if (DISPLAY_VER(i915) >= 13) {
start_range = ADLP_PIPE_MMIO_START;
end_range = ADLP_PIPE_MMIO_END;
} else if (DISPLAY_VER(i915) >= 12) {
start_range = TGL_PIPE_MMIO_START(dmc_id);
end_range = TGL_PIPE_MMIO_END(dmc_id);
} else {
drm_warn(&i915->drm, "Unknown mmio range for sanity check");
return false;
}
for (i = 0; i < mmio_count; i++) {
if (mmioaddr[i] < start_range || mmioaddr[i] > end_range)
return false;
}
return true;
}
static u32 parse_dmc_fw_header(struct intel_dmc *dmc,
const struct intel_dmc_header_base *dmc_header,
size_t rem_size, u8 dmc_id)
{
struct drm_i915_private *i915 = container_of(dmc, typeof(*i915), display.dmc);
struct dmc_fw_info *dmc_info = &dmc->dmc_info[dmc_id];
unsigned int header_len_bytes, dmc_header_size, payload_size, i;
const u32 *mmioaddr, *mmiodata;
u32 mmio_count, mmio_count_max, start_mmioaddr;
u8 *payload;
BUILD_BUG_ON(ARRAY_SIZE(dmc_info->mmioaddr) < DMC_V3_MAX_MMIO_COUNT ||
ARRAY_SIZE(dmc_info->mmioaddr) < DMC_V1_MAX_MMIO_COUNT);
/*
* Check if we can access common fields, we will checkc again below
* after we have read the version
*/
if (rem_size < sizeof(struct intel_dmc_header_base))
goto error_truncated;
/* Cope with small differences between v1 and v3 */
if (dmc_header->header_ver == 3) {
const struct intel_dmc_header_v3 *v3 =
(const struct intel_dmc_header_v3 *)dmc_header;
if (rem_size < sizeof(struct intel_dmc_header_v3))
goto error_truncated;
mmioaddr = v3->mmioaddr;
mmiodata = v3->mmiodata;
mmio_count = v3->mmio_count;
mmio_count_max = DMC_V3_MAX_MMIO_COUNT;
/* header_len is in dwords */
header_len_bytes = dmc_header->header_len * 4;
start_mmioaddr = v3->start_mmioaddr;
dmc_header_size = sizeof(*v3);
} else if (dmc_header->header_ver == 1) {
const struct intel_dmc_header_v1 *v1 =
(const struct intel_dmc_header_v1 *)dmc_header;
if (rem_size < sizeof(struct intel_dmc_header_v1))
goto error_truncated;
mmioaddr = v1->mmioaddr;
mmiodata = v1->mmiodata;
mmio_count = v1->mmio_count;
mmio_count_max = DMC_V1_MAX_MMIO_COUNT;
header_len_bytes = dmc_header->header_len;
start_mmioaddr = DMC_V1_MMIO_START_RANGE;
dmc_header_size = sizeof(*v1);
} else {
drm_err(&i915->drm, "Unknown DMC fw header version: %u\n",
dmc_header->header_ver);
return 0;
}
if (header_len_bytes != dmc_header_size) {
drm_err(&i915->drm, "DMC firmware has wrong dmc header length "
"(%u bytes)\n", header_len_bytes);
return 0;
}
/* Cache the dmc header info. */
if (mmio_count > mmio_count_max) {
drm_err(&i915->drm, "DMC firmware has wrong mmio count %u\n", mmio_count);
return 0;
}
if (!dmc_mmio_addr_sanity_check(dmc, mmioaddr, mmio_count,
dmc_header->header_ver, dmc_id)) {
drm_err(&i915->drm, "DMC firmware has Wrong MMIO Addresses\n");
return 0;
}
for (i = 0; i < mmio_count; i++) {
dmc_info->mmioaddr[i] = _MMIO(mmioaddr[i]);
dmc_info->mmiodata[i] = mmiodata[i];
}
dmc_info->mmio_count = mmio_count;
dmc_info->start_mmioaddr = start_mmioaddr;
rem_size -= header_len_bytes;
/* fw_size is in dwords, so multiplied by 4 to convert into bytes. */
payload_size = dmc_header->fw_size * 4;
if (rem_size < payload_size)
goto error_truncated;
if (payload_size > dmc->max_fw_size) {
drm_err(&i915->drm, "DMC FW too big (%u bytes)\n", payload_size);
return 0;
}
dmc_info->dmc_fw_size = dmc_header->fw_size;
dmc_info->payload = kmalloc(payload_size, GFP_KERNEL);
if (!dmc_info->payload)
return 0;
payload = (u8 *)(dmc_header) + header_len_bytes;
memcpy(dmc_info->payload, payload, payload_size);
return header_len_bytes + payload_size;
error_truncated:
drm_err(&i915->drm, "Truncated DMC firmware, refusing.\n");
return 0;
}
static u32
parse_dmc_fw_package(struct intel_dmc *dmc,
const struct intel_package_header *package_header,
const struct stepping_info *si,
size_t rem_size)
{
struct drm_i915_private *i915 = container_of(dmc, typeof(*i915), display.dmc);
u32 package_size = sizeof(struct intel_package_header);
u32 num_entries, max_entries;
const struct intel_fw_info *fw_info;
if (rem_size < package_size)
goto error_truncated;
if (package_header->header_ver == 1) {
max_entries = PACKAGE_MAX_FW_INFO_ENTRIES;
} else if (package_header->header_ver == 2) {
max_entries = PACKAGE_V2_MAX_FW_INFO_ENTRIES;
} else {
drm_err(&i915->drm, "DMC firmware has unknown header version %u\n",
package_header->header_ver);
return 0;
}
/*
* We should always have space for max_entries,
* even if not all are used
*/
package_size += max_entries * sizeof(struct intel_fw_info);
if (rem_size < package_size)
goto error_truncated;
if (package_header->header_len * 4 != package_size) {
drm_err(&i915->drm, "DMC firmware has wrong package header length "
"(%u bytes)\n", package_size);
return 0;
}
num_entries = package_header->num_entries;
if (WARN_ON(package_header->num_entries > max_entries))
num_entries = max_entries;
fw_info = (const struct intel_fw_info *)
((u8 *)package_header + sizeof(*package_header));
dmc_set_fw_offset(dmc, fw_info, num_entries, si,
package_header->header_ver);
/* dmc_offset is in dwords */
return package_size;
error_truncated:
drm_err(&i915->drm, "Truncated DMC firmware, refusing.\n");
return 0;
}
/* Return number of bytes parsed or 0 on error */
static u32 parse_dmc_fw_css(struct intel_dmc *dmc,
struct intel_css_header *css_header,
size_t rem_size)
{
struct drm_i915_private *i915 = container_of(dmc, typeof(*i915), display.dmc);
if (rem_size < sizeof(struct intel_css_header)) {
drm_err(&i915->drm, "Truncated DMC firmware, refusing.\n");
return 0;
}
if (sizeof(struct intel_css_header) !=
(css_header->header_len * 4)) {
drm_err(&i915->drm, "DMC firmware has wrong CSS header length "
"(%u bytes)\n",
(css_header->header_len * 4));
return 0;
}
dmc->version = css_header->version;
return sizeof(struct intel_css_header);
}
static void parse_dmc_fw(struct drm_i915_private *dev_priv,
const struct firmware *fw)
{
struct intel_css_header *css_header;
struct intel_package_header *package_header;
struct intel_dmc_header_base *dmc_header;
struct intel_dmc *dmc = &dev_priv->display.dmc;
struct stepping_info display_info = { '*', '*'};
const struct stepping_info *si = intel_get_stepping_info(dev_priv, &display_info);
u32 readcount = 0;
u32 r, offset;
int id;
if (!fw)
return;
/* Extract CSS Header information */
css_header = (struct intel_css_header *)fw->data;
r = parse_dmc_fw_css(dmc, css_header, fw->size);
if (!r)
return;
readcount += r;
/* Extract Package Header information */
package_header = (struct intel_package_header *)&fw->data[readcount];
r = parse_dmc_fw_package(dmc, package_header, si, fw->size - readcount);
if (!r)
return;
readcount += r;
for (id = 0; id < DMC_FW_MAX; id++) {
if (!dev_priv->display.dmc.dmc_info[id].present)
continue;
offset = readcount + dmc->dmc_info[id].dmc_offset * 4;
if (offset > fw->size) {
drm_err(&dev_priv->drm, "Reading beyond the fw_size\n");
continue;
}
dmc_header = (struct intel_dmc_header_base *)&fw->data[offset];
parse_dmc_fw_header(dmc, dmc_header, fw->size - offset, id);
}
}
static void intel_dmc_runtime_pm_get(struct drm_i915_private *dev_priv)
{
drm_WARN_ON(&dev_priv->drm, dev_priv->display.dmc.wakeref);
dev_priv->display.dmc.wakeref =
intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
}
static void intel_dmc_runtime_pm_put(struct drm_i915_private *dev_priv)
{
intel_wakeref_t wakeref __maybe_unused =
fetch_and_zero(&dev_priv->display.dmc.wakeref);
intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
}
static const char *dmc_fallback_path(struct drm_i915_private *i915)
{
if (IS_ALDERLAKE_P(i915))
return ADLP_DMC_FALLBACK_PATH;
return NULL;
}
static void dmc_load_work_fn(struct work_struct *work)
{
struct drm_i915_private *dev_priv;
struct intel_dmc *dmc;
const struct firmware *fw = NULL;
const char *fallback_path;
int err;
dev_priv = container_of(work, typeof(*dev_priv), display.dmc.work);
dmc = &dev_priv->display.dmc;
err = request_firmware(&fw, dev_priv->display.dmc.fw_path, dev_priv->drm.dev);
if (err == -ENOENT && !dev_priv->params.dmc_firmware_path) {
fallback_path = dmc_fallback_path(dev_priv);
if (fallback_path) {
drm_dbg_kms(&dev_priv->drm,
"%s not found, falling back to %s\n",
dmc->fw_path,
fallback_path);
err = request_firmware(&fw, fallback_path, dev_priv->drm.dev);
if (err == 0)
dev_priv->display.dmc.fw_path = fallback_path;
}
}
parse_dmc_fw(dev_priv, fw);
if (intel_dmc_has_payload(dev_priv)) {
intel_dmc_load_program(dev_priv);
intel_dmc_runtime_pm_put(dev_priv);
drm_info(&dev_priv->drm,
"Finished loading DMC firmware %s (v%u.%u)\n",
dev_priv->display.dmc.fw_path, DMC_VERSION_MAJOR(dmc->version),
DMC_VERSION_MINOR(dmc->version));
} else {
drm_notice(&dev_priv->drm,
"Failed to load DMC firmware %s."
" Disabling runtime power management.\n",
dmc->fw_path);
drm_notice(&dev_priv->drm, "DMC firmware homepage: %s",
INTEL_UC_FIRMWARE_URL);
}
release_firmware(fw);
}
/**
* intel_dmc_ucode_init() - initialize the firmware loading.
* @dev_priv: i915 drm device.
*
* This function is called at the time of loading the display driver to read
* firmware from a .bin file and copied into a internal memory.
*/
void intel_dmc_ucode_init(struct drm_i915_private *dev_priv)
{
struct intel_dmc *dmc = &dev_priv->display.dmc;
INIT_WORK(&dev_priv->display.dmc.work, dmc_load_work_fn);
if (!HAS_DMC(dev_priv))
return;
/*
* Obtain a runtime pm reference, until DMC is loaded, to avoid entering
* runtime-suspend.
*
* On error, we return with the rpm wakeref held to prevent runtime
* suspend as runtime suspend *requires* a working DMC for whatever
* reason.
*/
intel_dmc_runtime_pm_get(dev_priv);
if (IS_DG2(dev_priv)) {
dmc->fw_path = DG2_DMC_PATH;
dmc->max_fw_size = DISPLAY_VER13_DMC_MAX_FW_SIZE;
} else if (IS_ALDERLAKE_P(dev_priv)) {
dmc->fw_path = ADLP_DMC_PATH;
dmc->max_fw_size = DISPLAY_VER13_DMC_MAX_FW_SIZE;
} else if (IS_ALDERLAKE_S(dev_priv)) {
dmc->fw_path = ADLS_DMC_PATH;
dmc->max_fw_size = DISPLAY_VER12_DMC_MAX_FW_SIZE;
} else if (IS_DG1(dev_priv)) {
dmc->fw_path = DG1_DMC_PATH;
dmc->max_fw_size = DISPLAY_VER12_DMC_MAX_FW_SIZE;
} else if (IS_ROCKETLAKE(dev_priv)) {
dmc->fw_path = RKL_DMC_PATH;
dmc->max_fw_size = DISPLAY_VER12_DMC_MAX_FW_SIZE;
} else if (IS_TIGERLAKE(dev_priv)) {
dmc->fw_path = TGL_DMC_PATH;
dmc->max_fw_size = DISPLAY_VER12_DMC_MAX_FW_SIZE;
} else if (DISPLAY_VER(dev_priv) == 11) {
dmc->fw_path = ICL_DMC_PATH;
dmc->max_fw_size = ICL_DMC_MAX_FW_SIZE;
} else if (IS_GEMINILAKE(dev_priv)) {
dmc->fw_path = GLK_DMC_PATH;
dmc->max_fw_size = GLK_DMC_MAX_FW_SIZE;
} else if (IS_KABYLAKE(dev_priv) ||
IS_COFFEELAKE(dev_priv) ||
IS_COMETLAKE(dev_priv)) {
dmc->fw_path = KBL_DMC_PATH;
dmc->max_fw_size = KBL_DMC_MAX_FW_SIZE;
} else if (IS_SKYLAKE(dev_priv)) {
dmc->fw_path = SKL_DMC_PATH;
dmc->max_fw_size = SKL_DMC_MAX_FW_SIZE;
} else if (IS_BROXTON(dev_priv)) {
dmc->fw_path = BXT_DMC_PATH;
dmc->max_fw_size = BXT_DMC_MAX_FW_SIZE;
}
if (dev_priv->params.dmc_firmware_path) {
if (strlen(dev_priv->params.dmc_firmware_path) == 0) {
dmc->fw_path = NULL;
drm_info(&dev_priv->drm,
"Disabling DMC firmware and runtime PM\n");
return;
}
dmc->fw_path = dev_priv->params.dmc_firmware_path;
}
if (!dmc->fw_path) {
drm_dbg_kms(&dev_priv->drm,
"No known DMC firmware for platform, disabling runtime PM\n");
return;
}
drm_dbg_kms(&dev_priv->drm, "Loading %s\n", dmc->fw_path);
schedule_work(&dev_priv->display.dmc.work);
}
/**
* intel_dmc_ucode_suspend() - prepare DMC firmware before system suspend
* @dev_priv: i915 drm device
*
* Prepare the DMC firmware before entering system suspend. This includes
* flushing pending work items and releasing any resources acquired during
* init.
*/
void intel_dmc_ucode_suspend(struct drm_i915_private *dev_priv)
{
if (!HAS_DMC(dev_priv))
return;
flush_work(&dev_priv->display.dmc.work);
/* Drop the reference held in case DMC isn't loaded. */
if (!intel_dmc_has_payload(dev_priv))
intel_dmc_runtime_pm_put(dev_priv);
}
/**
* intel_dmc_ucode_resume() - init DMC firmware during system resume
* @dev_priv: i915 drm device
*
* Reinitialize the DMC firmware during system resume, reacquiring any
* resources released in intel_dmc_ucode_suspend().
*/
void intel_dmc_ucode_resume(struct drm_i915_private *dev_priv)
{
if (!HAS_DMC(dev_priv))
return;
/*
* Reacquire the reference to keep RPM disabled in case DMC isn't
* loaded.
*/
if (!intel_dmc_has_payload(dev_priv))
intel_dmc_runtime_pm_get(dev_priv);
}
/**
* intel_dmc_ucode_fini() - unload the DMC firmware.
* @dev_priv: i915 drm device.
*
* Firmmware unloading includes freeing the internal memory and reset the
* firmware loading status.
*/
void intel_dmc_ucode_fini(struct drm_i915_private *dev_priv)
{
int id;
if (!HAS_DMC(dev_priv))
return;
intel_dmc_ucode_suspend(dev_priv);
drm_WARN_ON(&dev_priv->drm, dev_priv->display.dmc.wakeref);
for (id = 0; id < DMC_FW_MAX; id++)
kfree(dev_priv->display.dmc.dmc_info[id].payload);
}
void intel_dmc_print_error_state(struct drm_i915_error_state_buf *m,
struct drm_i915_private *i915)
{
struct intel_dmc *dmc = &i915->display.dmc;
if (!HAS_DMC(i915))
return;
i915_error_printf(m, "DMC loaded: %s\n",
str_yes_no(intel_dmc_has_payload(i915)));
i915_error_printf(m, "DMC fw version: %d.%d\n",
DMC_VERSION_MAJOR(dmc->version),
DMC_VERSION_MINOR(dmc->version));
}
static int intel_dmc_debugfs_status_show(struct seq_file *m, void *unused)
{
struct drm_i915_private *i915 = m->private;
intel_wakeref_t wakeref;
struct intel_dmc *dmc;
i915_reg_t dc5_reg, dc6_reg = INVALID_MMIO_REG;
if (!HAS_DMC(i915))
return -ENODEV;
dmc = &i915->display.dmc;
wakeref = intel_runtime_pm_get(&i915->runtime_pm);
seq_printf(m, "fw loaded: %s\n",
str_yes_no(intel_dmc_has_payload(i915)));
seq_printf(m, "path: %s\n", dmc->fw_path);
seq_printf(m, "Pipe A fw needed: %s\n",
str_yes_no(GRAPHICS_VER(i915) >= 12));
seq_printf(m, "Pipe A fw loaded: %s\n",
str_yes_no(dmc->dmc_info[DMC_FW_PIPEA].payload));
seq_printf(m, "Pipe B fw needed: %s\n",
str_yes_no(IS_ALDERLAKE_P(i915) ||
DISPLAY_VER(i915) >= 14));
seq_printf(m, "Pipe B fw loaded: %s\n",
str_yes_no(dmc->dmc_info[DMC_FW_PIPEB].payload));
if (!intel_dmc_has_payload(i915))
goto out;
seq_printf(m, "version: %d.%d\n", DMC_VERSION_MAJOR(dmc->version),
DMC_VERSION_MINOR(dmc->version));
if (DISPLAY_VER(i915) >= 12) {
i915_reg_t dc3co_reg;
if (IS_DGFX(i915) || DISPLAY_VER(i915) >= 14) {
dc3co_reg = DG1_DMC_DEBUG3;
dc5_reg = DG1_DMC_DEBUG_DC5_COUNT;
} else {
dc3co_reg = TGL_DMC_DEBUG3;
dc5_reg = TGL_DMC_DEBUG_DC5_COUNT;
dc6_reg = TGL_DMC_DEBUG_DC6_COUNT;
}
seq_printf(m, "DC3CO count: %d\n",
intel_de_read(i915, dc3co_reg));
} else {
dc5_reg = IS_BROXTON(i915) ? BXT_DMC_DC3_DC5_COUNT :
SKL_DMC_DC3_DC5_COUNT;
if (!IS_GEMINILAKE(i915) && !IS_BROXTON(i915))
dc6_reg = SKL_DMC_DC5_DC6_COUNT;
}
seq_printf(m, "DC3 -> DC5 count: %d\n", intel_de_read(i915, dc5_reg));
if (i915_mmio_reg_valid(dc6_reg))
seq_printf(m, "DC5 -> DC6 count: %d\n",
intel_de_read(i915, dc6_reg));
out:
seq_printf(m, "program base: 0x%08x\n",
intel_de_read(i915, DMC_PROGRAM(dmc->dmc_info[DMC_FW_MAIN].start_mmioaddr, 0)));
seq_printf(m, "ssp base: 0x%08x\n",
intel_de_read(i915, DMC_SSP_BASE));
seq_printf(m, "htp: 0x%08x\n", intel_de_read(i915, DMC_HTP_SKL));
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(intel_dmc_debugfs_status);
void intel_dmc_debugfs_register(struct drm_i915_private *i915)
{
struct drm_minor *minor = i915->drm.primary;
debugfs_create_file("i915_dmc_info", 0444, minor->debugfs_root,
i915, &intel_dmc_debugfs_status_fops);
}
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