blob: a69b28d65a9ba6e5290645c7bbb9321fa81d51c0 [file] [log] [blame]
/*
* 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"
/**
* 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_PATH(platform, major, minor) \
"i915/" \
__stringify(platform) "_dmc_ver" \
__stringify(major) "_" \
__stringify(minor) ".bin"
#define GEN12_DMC_MAX_FW_SIZE ICL_DMC_MAX_FW_SIZE
#define GEN13_DMC_MAX_FW_SIZE 0x20000
#define ADLP_DMC_PATH DMC_PATH(adlp, 2, 14)
#define ADLP_DMC_VERSION_REQUIRED DMC_VERSION(2, 14)
MODULE_FIRMWARE(ADLP_DMC_PATH);
#define ADLS_DMC_PATH DMC_PATH(adls, 2, 01)
#define ADLS_DMC_VERSION_REQUIRED DMC_VERSION(2, 1)
MODULE_FIRMWARE(ADLS_DMC_PATH);
#define DG1_DMC_PATH DMC_PATH(dg1, 2, 02)
#define DG1_DMC_VERSION_REQUIRED DMC_VERSION(2, 2)
MODULE_FIRMWARE(DG1_DMC_PATH);
#define RKL_DMC_PATH DMC_PATH(rkl, 2, 03)
#define RKL_DMC_VERSION_REQUIRED DMC_VERSION(2, 3)
MODULE_FIRMWARE(RKL_DMC_PATH);
#define TGL_DMC_PATH DMC_PATH(tgl, 2, 12)
#define TGL_DMC_VERSION_REQUIRED DMC_VERSION(2, 12)
MODULE_FIRMWARE(TGL_DMC_PATH);
#define ICL_DMC_PATH DMC_PATH(icl, 1, 09)
#define ICL_DMC_VERSION_REQUIRED DMC_VERSION(1, 9)
#define ICL_DMC_MAX_FW_SIZE 0x6000
MODULE_FIRMWARE(ICL_DMC_PATH);
#define GLK_DMC_PATH DMC_PATH(glk, 1, 04)
#define GLK_DMC_VERSION_REQUIRED DMC_VERSION(1, 4)
#define GLK_DMC_MAX_FW_SIZE 0x4000
MODULE_FIRMWARE(GLK_DMC_PATH);
#define KBL_DMC_PATH DMC_PATH(kbl, 1, 04)
#define KBL_DMC_VERSION_REQUIRED DMC_VERSION(1, 4)
#define KBL_DMC_MAX_FW_SIZE BXT_DMC_MAX_FW_SIZE
MODULE_FIRMWARE(KBL_DMC_PATH);
#define SKL_DMC_PATH DMC_PATH(skl, 1, 27)
#define SKL_DMC_VERSION_REQUIRED DMC_VERSION(1, 27)
#define SKL_DMC_MAX_FW_SIZE BXT_DMC_MAX_FW_SIZE
MODULE_FIRMWARE(SKL_DMC_PATH);
#define BXT_DMC_PATH DMC_PATH(bxt, 1, 07)
#define BXT_DMC_VERSION_REQUIRED DMC_VERSION(1, 7)
#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
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;
};
bool intel_dmc_has_payload(struct drm_i915_private *i915)
{
return i915->dmc.dmc_info[DMC_FW_MAIN].payload;
}
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);
}
/**
* 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->dmc;
u32 id, i;
if (!HAS_DMC(dev_priv)) {
drm_err(&dev_priv->drm,
"No DMC support available for this platform\n");
return;
}
if (!dev_priv->dmc.dmc_info[DMC_FW_MAIN].payload) {
drm_err(&dev_priv->drm,
"Tried to program CSR with empty payload\n");
return;
}
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_uncore_write_fw(&dev_priv->uncore,
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->dmc.dc_state = 0;
gen9_set_dc_state_debugmask(dev_priv);
}
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), 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 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), 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;
}
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), 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), 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;
}
if (dmc->required_version &&
css_header->version != dmc->required_version) {
drm_info(&i915->drm, "Refusing to load DMC firmware v%u.%u,"
" please use v%u.%u\n",
DMC_VERSION_MAJOR(css_header->version),
DMC_VERSION_MINOR(css_header->version),
DMC_VERSION_MAJOR(dmc->required_version),
DMC_VERSION_MINOR(dmc->required_version));
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->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->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->dmc.wakeref);
dev_priv->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->dmc.wakeref);
intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
}
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;
dev_priv = container_of(work, typeof(*dev_priv), dmc.work);
dmc = &dev_priv->dmc;
request_firmware(&fw, dev_priv->dmc.fw_path, dev_priv->drm.dev);
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->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->dmc;
INIT_WORK(&dev_priv->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_ALDERLAKE_P(dev_priv)) {
dmc->fw_path = ADLP_DMC_PATH;
dmc->required_version = ADLP_DMC_VERSION_REQUIRED;
dmc->max_fw_size = GEN13_DMC_MAX_FW_SIZE;
} else if (IS_ALDERLAKE_S(dev_priv)) {
dmc->fw_path = ADLS_DMC_PATH;
dmc->required_version = ADLS_DMC_VERSION_REQUIRED;
dmc->max_fw_size = GEN12_DMC_MAX_FW_SIZE;
} else if (IS_DG1(dev_priv)) {
dmc->fw_path = DG1_DMC_PATH;
dmc->required_version = DG1_DMC_VERSION_REQUIRED;
dmc->max_fw_size = GEN12_DMC_MAX_FW_SIZE;
} else if (IS_ROCKETLAKE(dev_priv)) {
dmc->fw_path = RKL_DMC_PATH;
dmc->required_version = RKL_DMC_VERSION_REQUIRED;
dmc->max_fw_size = GEN12_DMC_MAX_FW_SIZE;
} else if (DISPLAY_VER(dev_priv) >= 12) {
dmc->fw_path = TGL_DMC_PATH;
dmc->required_version = TGL_DMC_VERSION_REQUIRED;
dmc->max_fw_size = GEN12_DMC_MAX_FW_SIZE;
} else if (DISPLAY_VER(dev_priv) == 11) {
dmc->fw_path = ICL_DMC_PATH;
dmc->required_version = ICL_DMC_VERSION_REQUIRED;
dmc->max_fw_size = ICL_DMC_MAX_FW_SIZE;
} else if (IS_GEMINILAKE(dev_priv)) {
dmc->fw_path = GLK_DMC_PATH;
dmc->required_version = GLK_DMC_VERSION_REQUIRED;
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->required_version = KBL_DMC_VERSION_REQUIRED;
dmc->max_fw_size = KBL_DMC_MAX_FW_SIZE;
} else if (IS_SKYLAKE(dev_priv)) {
dmc->fw_path = SKL_DMC_PATH;
dmc->required_version = SKL_DMC_VERSION_REQUIRED;
dmc->max_fw_size = SKL_DMC_MAX_FW_SIZE;
} else if (IS_BROXTON(dev_priv)) {
dmc->fw_path = BXT_DMC_PATH;
dmc->required_version = BXT_DMC_VERSION_REQUIRED;
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;
/* Bypass version check for firmware override. */
dmc->required_version = 0;
}
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->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->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->dmc.wakeref);
for (id = 0; id < DMC_FW_MAX; id++)
kfree(dev_priv->dmc.dmc_info[id].payload);
}