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amdgpu/pm/legacy: fix suspend/resume issues

Browse source 
resume and irq handler happily races in set_power_state()

* amdgpu_legacy_dpm_compute_clocks() needs lock
* protect irq work handler
* fix dpm_enabled usage

v2: fix clang build, integrate Lijo's comments (Alex)

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/2524
Fixes: 3712e7a494 ("drm/amd/pm: unified lock protections in amdgpu_dpm.c")
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Tested-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> # on Oland PRO
Signed-off-by: chr[] <chris@rudorff.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit ee3dc9e204d271c9c7a8d4d38a0bce4745d33e71)
Cc: stable@vger.kernel.org
This commit is contained in:
chr[] 2025-02-12 16:51:38 +01:00 • committed by Alex Deucher
parent d082ecbc71
commit 91dcc66b34
3 changed files with 45 additions and 14 deletions
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25
drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c
View file

@ -3042,6 +3042,7 @@ static int kv_dpm_hw_init(struct amdgpu_ip_block *ip_block)
if (!amdgpu_dpm)
return 0;
mutex_lock(&adev->pm.mutex);
kv_dpm_setup_asic(adev);
ret = kv_dpm_enable(adev);
if (ret)
@ -3049,6 +3050,8 @@ static int kv_dpm_hw_init(struct amdgpu_ip_block *ip_block)
else
adev->pm.dpm_enabled = true;
amdgpu_legacy_dpm_compute_clocks(adev);
mutex_unlock(&adev->pm.mutex);
return ret;
}
@ -3066,32 +3069,42 @@ static int kv_dpm_suspend(struct amdgpu_ip_block *ip_block)
{
struct amdgpu_device *adev = ip_block->adev;
cancel_work_sync(&adev->pm.dpm.thermal.work);
if (adev->pm.dpm_enabled) {
mutex_lock(&adev->pm.mutex);
adev->pm.dpm_enabled = false;
/* disable dpm */
kv_dpm_disable(adev);
/* reset the power state */
adev->pm.dpm.current_ps = adev->pm.dpm.requested_ps = adev->pm.dpm.boot_ps;
mutex_unlock(&adev->pm.mutex);
}
return 0;
}
static int kv_dpm_resume(struct amdgpu_ip_block *ip_block)
{
int ret;
int ret = 0;
struct amdgpu_device *adev = ip_block->adev;
if (adev->pm.dpm_enabled) {
if (!amdgpu_dpm)
return 0;
if (!adev->pm.dpm_enabled) {
mutex_lock(&adev->pm.mutex);
/* asic init will reset to the boot state */
kv_dpm_setup_asic(adev);
ret = kv_dpm_enable(adev);
if (ret)
if (ret) {
adev->pm.dpm_enabled = false;
else
} else {
adev->pm.dpm_enabled = true;
if (adev->pm.dpm_enabled)
amdgpu_legacy_dpm_compute_clocks(adev);
}
mutex_unlock(&adev->pm.mutex);
}
return 0;
return ret;
}
static bool kv_dpm_is_idle(void *handle)

8
drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c
View file

@ -1009,9 +1009,12 @@ void amdgpu_dpm_thermal_work_handler(struct work_struct *work)
enum amd_pm_state_type dpm_state = POWER_STATE_TYPE_INTERNAL_THERMAL;
int temp, size = sizeof(temp);
if (!adev->pm.dpm_enabled)
return;
mutex_lock(&adev->pm.mutex);
if (!adev->pm.dpm_enabled) {
mutex_unlock(&adev->pm.mutex);
return;
}
if (!pp_funcs->read_sensor(adev->powerplay.pp_handle,
AMDGPU_PP_SENSOR_GPU_TEMP,
(void *)&temp,
@ -1033,4 +1036,5 @@ void amdgpu_dpm_thermal_work_handler(struct work_struct *work)
adev->pm.dpm.state = dpm_state;
amdgpu_legacy_dpm_compute_clocks(adev->powerplay.pp_handle);
mutex_unlock(&adev->pm.mutex);
}

26
drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c
View file

@ -7786,6 +7786,7 @@ static int si_dpm_hw_init(struct amdgpu_ip_block *ip_block)
if (!amdgpu_dpm)
return 0;
mutex_lock(&adev->pm.mutex);
si_dpm_setup_asic(adev);
ret = si_dpm_enable(adev);
if (ret)
@ -7793,6 +7794,7 @@ static int si_dpm_hw_init(struct amdgpu_ip_block *ip_block)
else
adev->pm.dpm_enabled = true;
amdgpu_legacy_dpm_compute_clocks(adev);
mutex_unlock(&adev->pm.mutex);
return ret;
}
@ -7810,32 +7812,44 @@ static int si_dpm_suspend(struct amdgpu_ip_block *ip_block)
{
struct amdgpu_device *adev = ip_block->adev;
cancel_work_sync(&adev->pm.dpm.thermal.work);
if (adev->pm.dpm_enabled) {
mutex_lock(&adev->pm.mutex);
adev->pm.dpm_enabled = false;
/* disable dpm */
si_dpm_disable(adev);
/* reset the power state */
adev->pm.dpm.current_ps = adev->pm.dpm.requested_ps = adev->pm.dpm.boot_ps;
mutex_unlock(&adev->pm.mutex);
}
return 0;
}
static int si_dpm_resume(struct amdgpu_ip_block *ip_block)
{
int ret;
int ret = 0;
struct amdgpu_device *adev = ip_block->adev;
if (adev->pm.dpm_enabled) {
if (!amdgpu_dpm)
return 0;
if (!adev->pm.dpm_enabled) {
/* asic init will reset to the boot state */
mutex_lock(&adev->pm.mutex);
si_dpm_setup_asic(adev);
ret = si_dpm_enable(adev);
if (ret)
if (ret) {
adev->pm.dpm_enabled = false;
else
} else {
adev->pm.dpm_enabled = true;
if (adev->pm.dpm_enabled)
amdgpu_legacy_dpm_compute_clocks(adev);
}
mutex_unlock(&adev->pm.mutex);
}
return 0;
return ret;
}
static bool si_dpm_is_idle(void *handle)