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amdgpu: fix panic on old GPUs

PATCH Applied Rosen Penev 3 participants 10 messages Mar 21 – Mar 23

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#0 lore raw

v3 cover amdgpu: fix panic on old GPUs

Because of incomplete backports to stable kernels, DC ended up breaking on older GCN 1 GPUs. This patchset adds the missing upstream commits to at least fix the panic/black screen on boot.

They are applicable to 6.12, 6.6, and 6.1 as those are the currently supported kernels that 7009e3af0474aca5f64262b3c72fb6e23b232f9b got backported to.

6.1 needs two extra backports for these two commits to be cherry-picked cleanly. Those are

96ce96f8773da4814622fd97e5226915a2c30706
d09ef243035b75a6d403ebfeb7e87fa20d7e25c6

v3: Add those commits to this series and sign them off.
v2: Add Signed-off-by.

Alex Deucher (2):
drm/amdgpu: use proper DC check in amdgpu_display_supported_domains() drm/amdgpu: clarify DC checks

Timur Kristóf (2):
drm/amd/display: Add pixel_clock to amd_pp_display_configuration drm/amd/pm: Use pm_display_cfg in legacy DPM (v2)

 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c      |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c   |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    | 32 ++++-----
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c   |  4 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c       |  2 +-
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  1 +
 .../amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c  |  1 +
 .../dc/clk_mgr/dce110/dce110_clk_mgr.c        |  2 +-
 .../drm/amd/display/dc/dm_services_types.h    |  2 +-
 drivers/gpu/drm/amd/include/dm_pp_interface.h |  1 +
 drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c  | 67 +++++++++++++++++++
 .../gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h  |  2 +
 drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c    |  4 +-
 .../gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c    |  6 +-
 drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c    | 65 ++++++------------
 .../gpu/drm/amd/pm/powerplay/amd_powerplay.c  | 13 +---
 17 files changed, 126 insertions(+), 81 deletions(-)

--
2.53.0

#1 lore raw

PATCH v3 1/4 drm/amdgpu: use proper DC check in amdgpu_display_supported_domains()

From: Alex Deucher <[email protected]>

[ Upstream commit 96ce96f8773da4814622fd97e5226915a2c30706 ]

amdgpu_device_asic_has_dc_support() just checks the asic itself. amdgpu_device_has_dc_support() is a runtime check which not only checks the asic, but also other things in the driver like whether virtual display is enabled. We want the latter here.

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +1 -1
index cd0bccc95205..98cce09684f2 100644
@@ -534,7 +534,7 @@ uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev,
 	 */
 	if ((bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) &&
 	    amdgpu_bo_support_uswc(bo_flags) &&
-	    amdgpu_device_asic_has_dc_support(adev->asic_type) &&
+	    amdgpu_device_has_dc_support(adev) &&
 	    adev->mode_info.gpu_vm_support)
 		domain |= AMDGPU_GEM_DOMAIN_GTT;
 #endif

--
2.53.0

maintainer Applied
#2 lore raw

Patch "drm/amdgpu: use proper DC check in amdgpu_display_supported_domains()" has been added to the 6.1-stable tree

This is a note to let you know that I've just added the patch titled

drm/amdgpu: use proper DC check in amdgpu_display_supported_domains()

to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-amdgpu-use-proper-dc-check-in-amdgpu_display_supported_domains.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From [email protected] Sat Mar 21 06:45:14 2026
From: Rosen Penev <[email protected]>
Date: Fri, 20 Mar 2026 22:44:50 -0700
Subject: drm/amdgpu: use proper DC check in amdgpu_display_supported_domains()
To: [email protected]
Cc: "Alex Deucher" <[email protected]>, "Christian König" <[email protected]>, "Pan, Xinhui" <[email protected]>, "David Airlie" <[email protected]>, "Daniel Vetter" <[email protected]>, "Harry Wentland" <[email protected]>, "Leo Li" <[email protected]>, "Rodrigo Siqueira" <[email protected]>, "Evan Quan" <[email protected]>, "Mario Limonciello" <[email protected]>, "Sasha Levin" <[email protected]>, "Rosen Penev" <[email protected]>, "Lijo Lazar" <[email protected]>, "Ma Jun" <[email protected]>, "Greg Kroah-Hartman" <[email protected]>, "Srinivasan Shanmugam" <[email protected]>, "Mario Limonciello (AMD)" <[email protected]>, "Zhigang Luo" <[email protected]>, "Bert Karwatzki" <[email protected]>, "Ray Wu" <[email protected]>, "Wayne Lin" <[email protected]>, "Roman Li" <[email protected]>, "Hersen Wu" <[email protected]>, "Timur Kristóf" <[email protected]>, "Alex Hung" <[email protected]>, decce6 <[email protected]>, "Went
ao Liang" <[email protected]>, [email protected] (open list:RADEON and AMDGPU DRM DRIVERS), [email protected] (open list:DRM DRIVERS), [email protected] (open list)
Message-ID: <[email protected]>

From: Alex Deucher <[email protected]>

[ Upstream commit 96ce96f8773da4814622fd97e5226915a2c30706 ]

amdgpu_device_asic_has_dc_support() just checks the asic itself. amdgpu_device_has_dc_support() is a runtime check which not only checks the asic, but also other things in the driver like whether virtual display is enabled. We want the latter here.

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +1 -1
@@ -534,7 +534,7 @@ uint32_t amdgpu_display_supported_domain
 	 */
 	if ((bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) &&
 	    amdgpu_bo_support_uswc(bo_flags) &&
-	    amdgpu_device_asic_has_dc_support(adev->asic_type) &&
+	    amdgpu_device_has_dc_support(adev) &&
 	    adev->mode_info.gpu_vm_support)
 		domain |= AMDGPU_GEM_DOMAIN_GTT;
 #endif

Patches currently in stable-queue which might be from [email protected] are

queue-6.1/drm-amdgpu-clarify-dc-checks.patch queue-6.1/drm-amd-pm-use-pm_display_cfg-in-legacy-dpm-v2.patch queue-6.1/drm-amdgpu-use-proper-dc-check-in-amdgpu_display_supported_domains.patch queue-6.1/drm-amd-display-add-pixel_clock-to-amd_pp_display_configuration.patch

#3 lore raw

PATCH v3 2/4 drm/amdgpu: clarify DC checks

In reply to Rosen Penev

From: Alex Deucher <[email protected]>

[ Upstream commit d09ef243035b75a6d403ebfeb7e87fa20d7e25c6 ]

There are several places where we don't want to check if a particular asic could support DC, but rather, if DC is enabled. Set a flag if DC is enabled and check for that rather than if a device supports DC or not.

---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c      |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c   |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    | 32 ++++++++++---------
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c   |  4 +--
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c       |  2 +-
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  1 +
 .../gpu/drm/amd/pm/powerplay/amd_powerplay.c  |  2 +-
 8 files changed, 25 insertions(+), 21 deletions(-)
drivers/gpu/drm/amd/amdgpu/amdgpu.h +1 -0
index dcb5de01a220..c4287e09658f 100644
@@ -1071,6 +1071,7 @@ struct amdgpu_device {
 	struct work_struct		reset_work;
 
 	bool                            job_hang;
+	bool                            dc_enabled;
 };
 
 static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev)
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c +1 -1
index 5fa7f6d8aa30..9ced0c60ec8b 100644
@@ -857,7 +857,7 @@ int amdgpu_acpi_init(struct amdgpu_device *adev)
 	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
 
 	if (atif->notifications.brightness_change) {
-		if (amdgpu_device_has_dc_support(adev)) {
+		if (adev->dc_enabled) {
 #if defined(CONFIG_DRM_AMD_DC)
 			struct amdgpu_display_manager *dm = &adev->dm;
 
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +1 -1
index 3cca3f07f34d..11bfbf1d6a3d 100644
@@ -1981,7 +1981,7 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
 	amdgpu_ta_if_debugfs_init(adev);
 
 #if defined(CONFIG_DRM_AMD_DC)
-	if (amdgpu_device_has_dc_support(adev))
+	if (adev->dc_enabled)
 		dtn_debugfs_init(adev);
 #endif
 
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +17 -15
index 535cc74c5880..a43f18defa7a 100644
@@ -4402,25 +4402,27 @@ int amdgpu_device_resume(struct drm_device *dev, bool fbcon)
 
 	amdgpu_ras_resume(adev);
 
-	/*
-	 * Most of the connector probing functions try to acquire runtime pm
-	 * refs to ensure that the GPU is powered on when connector polling is
-	 * performed. Since we're calling this from a runtime PM callback,
-	 * trying to acquire rpm refs will cause us to deadlock.
-	 *
-	 * Since we're guaranteed to be holding the rpm lock, it's safe to
-	 * temporarily disable the rpm helpers so this doesn't deadlock us.
-	 */
+	if (adev->mode_info.num_crtc) {
+		/*
+		 * Most of the connector probing functions try to acquire runtime pm
+		 * refs to ensure that the GPU is powered on when connector polling is
+		 * performed. Since we're calling this from a runtime PM callback,
+		 * trying to acquire rpm refs will cause us to deadlock.
+		 *
+		 * Since we're guaranteed to be holding the rpm lock, it's safe to
+		 * temporarily disable the rpm helpers so this doesn't deadlock us.
+		 */
 #ifdef CONFIG_PM
-	dev->dev->power.disable_depth++;
+		dev->dev->power.disable_depth++;
 #endif
-	if (!amdgpu_device_has_dc_support(adev))
-		drm_helper_hpd_irq_event(dev);
-	else
-		drm_kms_helper_hotplug_event(dev);
+		if (!adev->dc_enabled)
+			drm_helper_hpd_irq_event(dev);
+		else
+			drm_kms_helper_hotplug_event(dev);
 #ifdef CONFIG_PM
-	dev->dev->power.disable_depth--;
+		dev->dev->power.disable_depth--;
 #endif
+	}
 	adev->in_suspend = false;
 
 	if (adev->enable_mes)
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +2 -2
index 98cce09684f2..f9692e724409 100644
@@ -534,7 +534,7 @@ uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev,
 	 */
 	if ((bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) &&
 	    amdgpu_bo_support_uswc(bo_flags) &&
-	    amdgpu_device_has_dc_support(adev) &&
+	    adev->dc_enabled &&
 	    adev->mode_info.gpu_vm_support)
 		domain |= AMDGPU_GEM_DOMAIN_GTT;
 #endif
@@ -1330,7 +1330,7 @@ int amdgpu_display_modeset_create_props(struct amdgpu_device *adev)
 					 "dither",
 					 amdgpu_dither_enum_list, sz);
 
-	if (amdgpu_device_has_dc_support(adev)) {
+	if (adev->dc_enabled) {
 		adev->mode_info.abm_level_property =
 			drm_property_create_range(adev_to_drm(adev), 0,
 						  "abm level", 0, 4);
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +1 -1
index 055e05b2cb22..3c01bb464248 100644
@@ -2530,7 +2530,7 @@ static int amdgpu_runtime_idle_check_display(struct device *dev)
 		if (ret)
 			return ret;
 
-		if (amdgpu_device_has_dc_support(adev)) {
+		if (adev->dc_enabled) {
 			struct drm_crtc *crtc;
 
 			drm_for_each_crtc(crtc, drm_dev) {
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +1 -0
index 213054071904..7eff2b94ab66 100644
@@ -4842,6 +4842,7 @@ static int dm_early_init(void *handle)
 		adev_to_drm(adev)->dev,
 		&dev_attr_s3_debug);
 #endif
+	adev->dc_enabled = true;
 
 	return 0;
 }
drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c +1 -1
index ab8ae7464664..9bf85ca607c3 100644
@@ -1567,7 +1567,7 @@ static void pp_pm_compute_clocks(void *handle)
 	struct pp_hwmgr *hwmgr = handle;
 	struct amdgpu_device *adev = hwmgr->adev;
 
-	if (!amdgpu_device_has_dc_support(adev)) {
+	if (!adev->dc_enabled) {
 		amdgpu_dpm_get_active_displays(adev);
 		adev->pm.pm_display_cfg.num_display = adev->pm.dpm.new_active_crtc_count;
 		adev->pm.pm_display_cfg.vrefresh = amdgpu_dpm_get_vrefresh(adev);

--
2.53.0

maintainer Applied
#4 lore raw

Patch "drm/amdgpu: clarify DC checks" has been added to the 6.1-stable tree

This is a note to let you know that I've just added the patch titled

drm/amdgpu: clarify DC checks

to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-amdgpu-clarify-dc-checks.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From [email protected] Sat Mar 21 06:45:17 2026
From: Rosen Penev <[email protected]>
Date: Fri, 20 Mar 2026 22:44:51 -0700
Subject: drm/amdgpu: clarify DC checks
To: [email protected]
Cc: "Alex Deucher" <[email protected]>, "Christian König" <[email protected]>, "Pan, Xinhui" <[email protected]>, "David Airlie" <[email protected]>, "Daniel Vetter" <[email protected]>, "Harry Wentland" <[email protected]>, "Leo Li" <[email protected]>, "Rodrigo Siqueira" <[email protected]>, "Evan Quan" <[email protected]>, "Mario Limonciello" <[email protected]>, "Sasha Levin" <[email protected]>, "Rosen Penev" <[email protected]>, "Lijo Lazar" <[email protected]>, "Ma Jun" <[email protected]>, "Greg Kroah-Hartman" <[email protected]>, "Srinivasan Shanmugam" <[email protected]>, "Mario Limonciello (AMD)" <[email protected]>, "Zhigang Luo" <[email protected]>, "Bert Karwatzki" <[email protected]>, "Ray Wu" <[email protected]>, "Wayne Lin" <[email protected]>, "Roman Li" <[email protected]>, "Hersen Wu" <[email protected]>, "Timur Kristóf" <[email protected]>, "Alex Hung" <[email protected]>, decce6 <[email protected]>, "Went
ao Liang" <[email protected]>, [email protected] (open list:RADEON and AMDGPU DRM DRIVERS), [email protected] (open list:DRM DRIVERS), [email protected] (open list)
Message-ID: <[email protected]>

From: Alex Deucher <[email protected]>

[ Upstream commit d09ef243035b75a6d403ebfeb7e87fa20d7e25c6 ]

There are several places where we don't want to check if a particular asic could support DC, but rather, if DC is enabled. Set a flag if DC is enabled and check for that rather than if a device supports DC or not.

---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h               |    1 
 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c          |    2 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c       |    2 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c        |   32 +++++++++++-----------
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c       |    4 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c           |    2 -
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |    1 
 drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c  |    2 -
 8 files changed, 25 insertions(+), 21 deletions(-)
drivers/gpu/drm/amd/amdgpu/amdgpu.h +1 -0
@@ -1071,6 +1071,7 @@ struct amdgpu_device {
 	struct work_struct		reset_work;
 
 	bool                            job_hang;
+	bool                            dc_enabled;
 };
 
 static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev)
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c +1 -1
@@ -857,7 +857,7 @@ int amdgpu_acpi_init(struct amdgpu_devic
 	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
 
 	if (atif->notifications.brightness_change) {
-		if (amdgpu_device_has_dc_support(adev)) {
+		if (adev->dc_enabled) {
 #if defined(CONFIG_DRM_AMD_DC)
 			struct amdgpu_display_manager *dm = &adev->dm;
 
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +1 -1
@@ -1981,7 +1981,7 @@ int amdgpu_debugfs_init(struct amdgpu_de
 	amdgpu_ta_if_debugfs_init(adev);
 
 #if defined(CONFIG_DRM_AMD_DC)
-	if (amdgpu_device_has_dc_support(adev))
+	if (adev->dc_enabled)
 		dtn_debugfs_init(adev);
 #endif
 
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +17 -15
@@ -4404,25 +4404,27 @@ int amdgpu_device_resume(struct drm_devi
 
 	amdgpu_ras_resume(adev);
 
-	/*
-	 * Most of the connector probing functions try to acquire runtime pm
-	 * refs to ensure that the GPU is powered on when connector polling is
-	 * performed. Since we're calling this from a runtime PM callback,
-	 * trying to acquire rpm refs will cause us to deadlock.
-	 *
-	 * Since we're guaranteed to be holding the rpm lock, it's safe to
-	 * temporarily disable the rpm helpers so this doesn't deadlock us.
-	 */
+	if (adev->mode_info.num_crtc) {
+		/*
+		 * Most of the connector probing functions try to acquire runtime pm
+		 * refs to ensure that the GPU is powered on when connector polling is
+		 * performed. Since we're calling this from a runtime PM callback,
+		 * trying to acquire rpm refs will cause us to deadlock.
+		 *
+		 * Since we're guaranteed to be holding the rpm lock, it's safe to
+		 * temporarily disable the rpm helpers so this doesn't deadlock us.
+		 */
 #ifdef CONFIG_PM
-	dev->dev->power.disable_depth++;
+		dev->dev->power.disable_depth++;
 #endif
-	if (!amdgpu_device_has_dc_support(adev))
-		drm_helper_hpd_irq_event(dev);
-	else
-		drm_kms_helper_hotplug_event(dev);
+		if (!adev->dc_enabled)
+			drm_helper_hpd_irq_event(dev);
+		else
+			drm_kms_helper_hotplug_event(dev);
 #ifdef CONFIG_PM
-	dev->dev->power.disable_depth--;
+		dev->dev->power.disable_depth--;
 #endif
+	}
 	adev->in_suspend = false;
 
 	if (adev->enable_mes)
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +2 -2
@@ -534,7 +534,7 @@ uint32_t amdgpu_display_supported_domain
 	 */
 	if ((bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) &&
 	    amdgpu_bo_support_uswc(bo_flags) &&
-	    amdgpu_device_has_dc_support(adev) &&
+	    adev->dc_enabled &&
 	    adev->mode_info.gpu_vm_support)
 		domain |= AMDGPU_GEM_DOMAIN_GTT;
 #endif
@@ -1330,7 +1330,7 @@ int amdgpu_display_modeset_create_props(
 					 "dither",
 					 amdgpu_dither_enum_list, sz);
 
-	if (amdgpu_device_has_dc_support(adev)) {
+	if (adev->dc_enabled) {
 		adev->mode_info.abm_level_property =
 			drm_property_create_range(adev_to_drm(adev), 0,
 						  "abm level", 0, 4);
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +1 -1
@@ -2530,7 +2530,7 @@ static int amdgpu_runtime_idle_check_dis
 		if (ret)
 			return ret;
 
-		if (amdgpu_device_has_dc_support(adev)) {
+		if (adev->dc_enabled) {
 			struct drm_crtc *crtc;
 
 			drm_for_each_crtc(crtc, drm_dev) {
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +1 -0
@@ -4842,6 +4842,7 @@ static int dm_early_init(void *handle)
 		adev_to_drm(adev)->dev,
 		&dev_attr_s3_debug);
 #endif
+	adev->dc_enabled = true;
 
 	return 0;
 }
drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c +1 -1
@@ -1567,7 +1567,7 @@ static void pp_pm_compute_clocks(void *h
 	struct pp_hwmgr *hwmgr = handle;
 	struct amdgpu_device *adev = hwmgr->adev;
 
-	if (!amdgpu_device_has_dc_support(adev)) {
+	if (!adev->dc_enabled) {
 		amdgpu_dpm_get_active_displays(adev);
 		adev->pm.pm_display_cfg.num_display = adev->pm.dpm.new_active_crtc_count;
 		adev->pm.pm_display_cfg.vrefresh = amdgpu_dpm_get_vrefresh(adev);

Patches currently in stable-queue which might be from [email protected] are

queue-6.1/drm-amdgpu-clarify-dc-checks.patch queue-6.1/drm-amd-pm-use-pm_display_cfg-in-legacy-dpm-v2.patch queue-6.1/drm-amdgpu-use-proper-dc-check-in-amdgpu_display_supported_domains.patch queue-6.1/drm-amd-display-add-pixel_clock-to-amd_pp_display_configuration.patch

#5 lore raw

PATCH v3 3/4 drm/amd/display: Add pixel_clock to amd_pp_display_configuration

In reply to Rosen Penev

From: Timur Kristóf <[email protected]>

[ Upstream commit b515dcb0dc4e85d8254f5459cfb32fce88dacbfb ]

This commit adds the pixel_clock field to the display config struct so that power management (DPM) can use it.

We currently don't have a proper bandwidth calculation on old GPUs with DCE 6-10 because dce_calcs only supports DCE 11+. So the power management (DPM) on these GPUs may need to make ad-hoc decisions for display based on the pixel clock.

Also rename sym_clock to pixel_clock in dm_pp_single_disp_config to avoid confusion with other code where the sym_clock refers to the DisplayPort symbol clock.

---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c       | 1 +
 drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c | 2 +-
 drivers/gpu/drm/amd/display/dc/dm_services_types.h             | 2 +-
 drivers/gpu/drm/amd/include/dm_pp_interface.h                  | 1 +
 4 files changed, 4 insertions(+), 2 deletions(-)
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c +1 -0
index 75284e2cec74..c4e7d9212cd4 100644
@@ -97,6 +97,7 @@ bool dm_pp_apply_display_requirements(
 			const struct dm_pp_single_disp_config *dc_cfg =
 						&pp_display_cfg->disp_configs[i];
 			adev->pm.pm_display_cfg.displays[i].controller_id = dc_cfg->pipe_idx + 1;
+			adev->pm.pm_display_cfg.displays[i].pixel_clock = dc_cfg->pixel_clock;
 		}
 
 		amdgpu_dpm_display_configuration_change(adev, &adev->pm.pm_display_cfg);
drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c +1 -1
index fb2f154f4fda..bce53ab36f3e 100644
@@ -164,7 +164,7 @@ void dce110_fill_display_configs(
 			stream->link->cur_link_settings.link_rate;
 		cfg->link_settings.link_spread =
 			stream->link->cur_link_settings.link_spread;
-		cfg->sym_clock = stream->phy_pix_clk;
+		cfg->pixel_clock = stream->phy_pix_clk;
 		/* Round v_refresh*/
 		cfg->v_refresh = stream->timing.pix_clk_100hz * 100;
 		cfg->v_refresh /= stream->timing.h_total;
drivers/gpu/drm/amd/display/dc/dm_services_types.h +1 -1
index b52ba6ffabe1..954b3aa65adb 100644
@@ -127,7 +127,7 @@ struct dm_pp_single_disp_config {
 	uint32_t src_height;
 	uint32_t src_width;
 	uint32_t v_refresh;
-	uint32_t sym_clock; /* HDMI only */
+	uint32_t pixel_clock; /* Pixel clock in KHz (for HDMI only: normalized) */
 	struct dc_link_settings link_settings; /* DP only */
 };
 
drivers/gpu/drm/amd/include/dm_pp_interface.h +1 -0
index 1d93a0c574c9..ee4212cc93d1 100644
@@ -66,6 +66,7 @@ struct single_display_configuration
 	uint32_t view_resolution_cy;
 	enum amd_pp_display_config_type displayconfigtype;
 	uint32_t vertical_refresh; /* for active display */
+	uint32_t pixel_clock; /* Pixel clock in KHz (for HDMI only: normalized) */
 };
 
 #define MAX_NUM_DISPLAY 32

--
2.53.0

maintainer Applied
#6 lore raw

Patch "drm/amd/display: Add pixel_clock to amd_pp_display_configuration" has been added to the 6.1-stable tree

This is a note to let you know that I've just added the patch titled

drm/amd/display: Add pixel_clock to amd_pp_display_configuration

to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-amd-display-add-pixel_clock-to-amd_pp_display_configuration.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From [email protected] Sat Mar 21 06:45:19 2026
From: Rosen Penev <[email protected]>
Date: Fri, 20 Mar 2026 22:44:52 -0700
Subject: drm/amd/display: Add pixel_clock to amd_pp_display_configuration
To: [email protected]
Cc: "Alex Deucher" <[email protected]>, "Christian König" <[email protected]>, "Pan, Xinhui" <[email protected]>, "David Airlie" <[email protected]>, "Daniel Vetter" <[email protected]>, "Harry Wentland" <[email protected]>, "Leo Li" <[email protected]>, "Rodrigo Siqueira" <[email protected]>, "Evan Quan" <[email protected]>, "Mario Limonciello" <[email protected]>, "Sasha Levin" <[email protected]>, "Rosen Penev" <[email protected]>, "Lijo Lazar" <[email protected]>, "Ma Jun" <[email protected]>, "Greg Kroah-Hartman" <[email protected]>, "Srinivasan Shanmugam" <[email protected]>, "Mario Limonciello (AMD)" <[email protected]>, "Zhigang Luo" <[email protected]>, "Bert Karwatzki" <[email protected]>, "Ray Wu" <[email protected]>, "Wayne Lin" <[email protected]>, "Roman Li" <[email protected]>, "Hersen Wu" <[email protected]>, "Timur Kristóf" <[email protected]>, "Alex Hung" <[email protected]>, decce6 <[email protected]>, "Went
ao Liang" <[email protected]>, [email protected] (open list:RADEON and AMDGPU DRM DRIVERS), [email protected] (open list:DRM DRIVERS), [email protected] (open list)
Message-ID: <[email protected]>

From: Timur Kristóf <[email protected]>

[ Upstream commit b515dcb0dc4e85d8254f5459cfb32fce88dacbfb ]

This commit adds the pixel_clock field to the display config struct so that power management (DPM) can use it.

We currently don't have a proper bandwidth calculation on old GPUs with DCE 6-10 because dce_calcs only supports DCE 11+. So the power management (DPM) on these GPUs may need to make ad-hoc decisions for display based on the pixel clock.

Also rename sym_clock to pixel_clock in dm_pp_single_disp_config to avoid confusion with other code where the sym_clock refers to the DisplayPort symbol clock.

---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c       |    1 +
 drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c |    2 +-
 drivers/gpu/drm/amd/display/dc/dm_services_types.h             |    2 +-
 drivers/gpu/drm/amd/include/dm_pp_interface.h                  |    1 +
 4 files changed, 4 insertions(+), 2 deletions(-)
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c +1 -0
@@ -97,6 +97,7 @@ bool dm_pp_apply_display_requirements(
 			const struct dm_pp_single_disp_config *dc_cfg =
 						&pp_display_cfg->disp_configs[i];
 			adev->pm.pm_display_cfg.displays[i].controller_id = dc_cfg->pipe_idx + 1;
+			adev->pm.pm_display_cfg.displays[i].pixel_clock = dc_cfg->pixel_clock;
 		}
 
 		amdgpu_dpm_display_configuration_change(adev, &adev->pm.pm_display_cfg);
drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_clk_mgr.c +1 -1
@@ -164,7 +164,7 @@ void dce110_fill_display_configs(
 			stream->link->cur_link_settings.link_rate;
 		cfg->link_settings.link_spread =
 			stream->link->cur_link_settings.link_spread;
-		cfg->sym_clock = stream->phy_pix_clk;
+		cfg->pixel_clock = stream->phy_pix_clk;
 		/* Round v_refresh*/
 		cfg->v_refresh = stream->timing.pix_clk_100hz * 100;
 		cfg->v_refresh /= stream->timing.h_total;
drivers/gpu/drm/amd/display/dc/dm_services_types.h +1 -1
@@ -127,7 +127,7 @@ struct dm_pp_single_disp_config {
 	uint32_t src_height;
 	uint32_t src_width;
 	uint32_t v_refresh;
-	uint32_t sym_clock; /* HDMI only */
+	uint32_t pixel_clock; /* Pixel clock in KHz (for HDMI only: normalized) */
 	struct dc_link_settings link_settings; /* DP only */
 };
 
drivers/gpu/drm/amd/include/dm_pp_interface.h +1 -0
@@ -66,6 +66,7 @@ struct single_display_configuration
 	uint32_t view_resolution_cy;
 	enum amd_pp_display_config_type displayconfigtype;
 	uint32_t vertical_refresh; /* for active display */
+	uint32_t pixel_clock; /* Pixel clock in KHz (for HDMI only: normalized) */
 };
 
 #define MAX_NUM_DISPLAY 32

Patches currently in stable-queue which might be from [email protected] are

queue-6.1/drm-amdgpu-clarify-dc-checks.patch queue-6.1/drm-amd-pm-use-pm_display_cfg-in-legacy-dpm-v2.patch queue-6.1/drm-amdgpu-use-proper-dc-check-in-amdgpu_display_supported_domains.patch queue-6.1/drm-amd-display-add-pixel_clock-to-amd_pp_display_configuration.patch

#7 lore raw

PATCH v3 4/4 drm/amd/pm: Use pm_display_cfg in legacy DPM (v2)

In reply to Rosen Penev

From: Timur Kristóf <[email protected]>

[ Upstream commit 9d73b107a61b73e7101d4b728ddac3d2c77db111 ]

This commit is necessary for DC to function well with chips that use the legacy power management code, ie. SI and KV. Communicate display information from DC to the legacy PM code.

Currently DC uses pm_display_cfg to communicate power management requirements from the display code to the DPM code. However, the legacy (non-DC) code path used different fields and therefore could not take into account anything from DC.

Change the legacy display code to fill the same pm_display_cfg struct as DC and use the same in the legacy DPM code.

To ease review and reduce churn, this commit does not yet delete the now unneeded code, that is done in the next commit.

v2:
Rebase.
Fix single_display in amdgpu_dpm_pick_power_state.

---
 drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c  | 67 +++++++++++++++++++
 .../gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h  |  2 +
 drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c    |  4 +-
 .../gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c    |  6 +-
 drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c    | 65 ++++++------------
 .../gpu/drm/amd/pm/powerplay/amd_powerplay.c  | 11 +--
 6 files changed, 97 insertions(+), 58 deletions(-)
drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c +67 -0
index 2d2d2d5e6763..9ef965e4a92e 100644
@@ -100,3 +100,70 @@ u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev)
 
 	return vrefresh;
 }
+
+void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev)
+{
+	struct drm_device *ddev = adev_to_drm(adev);
+	struct amd_pp_display_configuration *cfg = &adev->pm.pm_display_cfg;
+	struct single_display_configuration *display_cfg;
+	struct drm_crtc *crtc;
+	struct amdgpu_crtc *amdgpu_crtc;
+	struct amdgpu_connector *conn;
+	int num_crtcs = 0;
+	int vrefresh;
+	u32 vblank_in_pixels, vblank_time_us;
+
+	cfg->min_vblank_time = 0xffffffff; /* if the displays are off, vblank time is max */
+
+	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
+		list_for_each_entry(crtc, &ddev->mode_config.crtc_list, head) {
+			amdgpu_crtc = to_amdgpu_crtc(crtc);
+
+			/* The array should only contain active displays. */
+			if (!amdgpu_crtc->enabled)
+				continue;
+
+			conn = to_amdgpu_connector(amdgpu_crtc->connector);
+			display_cfg = &adev->pm.pm_display_cfg.displays[num_crtcs++];
+
+			if (amdgpu_crtc->hw_mode.clock) {
+				vrefresh = drm_mode_vrefresh(&amdgpu_crtc->hw_mode);
+
+				vblank_in_pixels =
+					amdgpu_crtc->hw_mode.crtc_htotal *
+					(amdgpu_crtc->hw_mode.crtc_vblank_end -
+					amdgpu_crtc->hw_mode.crtc_vdisplay +
+					(amdgpu_crtc->v_border * 2));
+
+				vblank_time_us =
+					vblank_in_pixels * 1000 / amdgpu_crtc->hw_mode.clock;
+
+				/* The legacy (non-DC) code has issues with mclk switching
+				 * with refresh rates over 120 Hz. Disable mclk switching.
+				 */
+				if (vrefresh > 120)
+					vblank_time_us = 0;
+
+				/* Find minimum vblank time. */
+				if (vblank_time_us < cfg->min_vblank_time)
+					cfg->min_vblank_time = vblank_time_us;
+
+				/* Find vertical refresh rate of first active display. */
+				if (!cfg->vrefresh)
+					cfg->vrefresh = vrefresh;
+			}
+
+			if (amdgpu_crtc->crtc_id < cfg->crtc_index) {
+				/* Find first active CRTC and its line time. */
+				cfg->crtc_index = amdgpu_crtc->crtc_id;
+				cfg->line_time_in_us = amdgpu_crtc->line_time;
+			}
+
+			display_cfg->controller_id = amdgpu_crtc->crtc_id;
+			display_cfg->pixel_clock = conn->pixelclock_for_modeset;
+		}
+	}
+
+	cfg->display_clk = adev->clock.default_dispclk;
+	cfg->num_display = num_crtcs;
+}
drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h +2 -0
index 5c2a89f0d5d5..8be11510cd92 100644
@@ -29,4 +29,6 @@ u32 amdgpu_dpm_get_vblank_time(struct amdgpu_device *adev);
 
 u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev);
 
+void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev);
+
 #endif
drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c +2 -2
index a75c04d510fd..de25e63abc7b 100644
@@ -2312,7 +2312,7 @@ static void kv_apply_state_adjust_rules(struct amdgpu_device *adev,
 
 		if (pi->sys_info.nb_dpm_enable) {
 			force_high = (mclk >= pi->sys_info.nbp_memory_clock[3]) ||
-				pi->video_start || (adev->pm.dpm.new_active_crtc_count >= 3) ||
+				pi->video_start || (adev->pm.pm_display_cfg.num_display >= 3) ||
 				pi->disable_nb_ps3_in_battery;
 			ps->dpm0_pg_nb_ps_lo = force_high ? 0x2 : 0x3;
 			ps->dpm0_pg_nb_ps_hi = 0x2;
@@ -2371,7 +2371,7 @@ static int kv_calculate_nbps_level_settings(struct amdgpu_device *adev)
 			return 0;
 
 		force_high = ((mclk >= pi->sys_info.nbp_memory_clock[3]) ||
-			      (adev->pm.dpm.new_active_crtc_count >= 3) || pi->video_start);
+			      (adev->pm.pm_display_cfg.num_display >= 3) || pi->video_start);
 
 		if (force_high) {
 			for (i = pi->lowest_valid; i <= pi->highest_valid; i++)
drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c +3 -3
index 2fd97f5cf8f6..1aa435ddde9a 100644
@@ -797,8 +797,7 @@ static struct amdgpu_ps *amdgpu_dpm_pick_power_state(struct amdgpu_device *adev,
 	int i;
 	struct amdgpu_ps *ps;
 	u32 ui_class;
-	bool single_display = (adev->pm.dpm.new_active_crtc_count < 2) ?
-		true : false;
+	bool single_display = adev->pm.pm_display_cfg.num_display < 2;
 
 	/* check if the vblank period is too short to adjust the mclk */
 	if (single_display && adev->powerplay.pp_funcs->vblank_too_short) {
@@ -1003,7 +1002,8 @@ void amdgpu_legacy_dpm_compute_clocks(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_dpm_get_active_displays(adev);
+	if (!adev->dc_enabled)
+		amdgpu_dpm_get_display_cfg(adev);
 
 	amdgpu_dpm_change_power_state_locked(adev);
 }
drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c +22 -43

150 lines not on this page · raw message

drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c +1 -10
index 9bf85ca607c3..1f8b744d6b17 100644
@@ -1568,16 +1568,7 @@ static void pp_pm_compute_clocks(void *handle)
 	struct amdgpu_device *adev = hwmgr->adev;
 
 	if (!adev->dc_enabled) {
-		amdgpu_dpm_get_active_displays(adev);
-		adev->pm.pm_display_cfg.num_display = adev->pm.dpm.new_active_crtc_count;
-		adev->pm.pm_display_cfg.vrefresh = amdgpu_dpm_get_vrefresh(adev);
-		adev->pm.pm_display_cfg.min_vblank_time = amdgpu_dpm_get_vblank_time(adev);
-		/* we have issues with mclk switching with
-		 * refresh rates over 120 hz on the non-DC code.
-		 */
-		if (adev->pm.pm_display_cfg.vrefresh > 120)
-			adev->pm.pm_display_cfg.min_vblank_time = 0;
-
+		amdgpu_dpm_get_display_cfg(adev);
 		pp_display_configuration_change(handle,
 						&adev->pm.pm_display_cfg);
 	}

--
2.53.0

maintainer Applied
#8 lore raw

Patch "drm/amd/pm: Use pm_display_cfg in legacy DPM (v2)" has been added to the 6.1-stable tree

This is a note to let you know that I've just added the patch titled

drm/amd/pm: Use pm_display_cfg in legacy DPM (v2)

to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-amd-pm-use-pm_display_cfg-in-legacy-dpm-v2.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From [email protected] Sat Mar 21 06:45:21 2026
From: Rosen Penev <[email protected]>
Date: Fri, 20 Mar 2026 22:44:53 -0700
Subject: drm/amd/pm: Use pm_display_cfg in legacy DPM (v2)
To: [email protected]
Cc: "Alex Deucher" <[email protected]>, "Christian König" <[email protected]>, "Pan, Xinhui" <[email protected]>, "David Airlie" <[email protected]>, "Daniel Vetter" <[email protected]>, "Harry Wentland" <[email protected]>, "Leo Li" <[email protected]>, "Rodrigo Siqueira" <[email protected]>, "Evan Quan" <[email protected]>, "Mario Limonciello" <[email protected]>, "Sasha Levin" <[email protected]>, "Rosen Penev" <[email protected]>, "Lijo Lazar" <[email protected]>, "Ma Jun" <[email protected]>, "Greg Kroah-Hartman" <[email protected]>, "Srinivasan Shanmugam" <[email protected]>, "Mario Limonciello (AMD)" <[email protected]>, "Zhigang Luo" <[email protected]>, "Bert Karwatzki" <[email protected]>, "Ray Wu" <[email protected]>, "Wayne Lin" <[email protected]>, "Roman Li" <[email protected]>, "Hersen Wu" <[email protected]>, "Timur Kristóf" <[email protected]>, "Alex Hung" <[email protected]>, decce6 <[email protected]>, "Went
ao Liang" <[email protected]>, [email protected] (open list:RADEON and AMDGPU DRM DRIVERS), [email protected] (open list:DRM DRIVERS), [email protected] (open list)
Message-ID: <[email protected]>

From: Timur Kristóf <[email protected]>

[ Upstream commit 9d73b107a61b73e7101d4b728ddac3d2c77db111 ]

This commit is necessary for DC to function well with chips that use the legacy power management code, ie. SI and KV. Communicate display information from DC to the legacy PM code.

Currently DC uses pm_display_cfg to communicate power management requirements from the display code to the DPM code. However, the legacy (non-DC) code path used different fields and therefore could not take into account anything from DC.

Change the legacy display code to fill the same pm_display_cfg struct as DC and use the same in the legacy DPM code.

To ease review and reduce churn, this commit does not yet delete the now unneeded code, that is done in the next commit.

v2:
Rebase.
Fix single_display in amdgpu_dpm_pick_power_state.

---
 drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c     |   67 +++++++++++++++++++++++
 drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h |    2 
 drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c       |    4 -
 drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c   |    6 +-
 drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c       |   65 +++++++---------------
 drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c |   11 ---
 6 files changed, 97 insertions(+), 58 deletions(-)
drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c +67 -0
@@ -100,3 +100,70 @@ u32 amdgpu_dpm_get_vrefresh(struct amdgp
 
 	return vrefresh;
 }
+
+void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev)
+{
+	struct drm_device *ddev = adev_to_drm(adev);
+	struct amd_pp_display_configuration *cfg = &adev->pm.pm_display_cfg;
+	struct single_display_configuration *display_cfg;
+	struct drm_crtc *crtc;
+	struct amdgpu_crtc *amdgpu_crtc;
+	struct amdgpu_connector *conn;
+	int num_crtcs = 0;
+	int vrefresh;
+	u32 vblank_in_pixels, vblank_time_us;
+
+	cfg->min_vblank_time = 0xffffffff; /* if the displays are off, vblank time is max */
+
+	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
+		list_for_each_entry(crtc, &ddev->mode_config.crtc_list, head) {
+			amdgpu_crtc = to_amdgpu_crtc(crtc);
+
+			/* The array should only contain active displays. */
+			if (!amdgpu_crtc->enabled)
+				continue;
+
+			conn = to_amdgpu_connector(amdgpu_crtc->connector);
+			display_cfg = &adev->pm.pm_display_cfg.displays[num_crtcs++];
+
+			if (amdgpu_crtc->hw_mode.clock) {
+				vrefresh = drm_mode_vrefresh(&amdgpu_crtc->hw_mode);
+
+				vblank_in_pixels =
+					amdgpu_crtc->hw_mode.crtc_htotal *
+					(amdgpu_crtc->hw_mode.crtc_vblank_end -
+					amdgpu_crtc->hw_mode.crtc_vdisplay +
+					(amdgpu_crtc->v_border * 2));
+
+				vblank_time_us =
+					vblank_in_pixels * 1000 / amdgpu_crtc->hw_mode.clock;
+
+				/* The legacy (non-DC) code has issues with mclk switching
+				 * with refresh rates over 120 Hz. Disable mclk switching.
+				 */
+				if (vrefresh > 120)
+					vblank_time_us = 0;
+
+				/* Find minimum vblank time. */
+				if (vblank_time_us < cfg->min_vblank_time)
+					cfg->min_vblank_time = vblank_time_us;
+
+				/* Find vertical refresh rate of first active display. */
+				if (!cfg->vrefresh)
+					cfg->vrefresh = vrefresh;
+			}
+
+			if (amdgpu_crtc->crtc_id < cfg->crtc_index) {
+				/* Find first active CRTC and its line time. */
+				cfg->crtc_index = amdgpu_crtc->crtc_id;
+				cfg->line_time_in_us = amdgpu_crtc->line_time;
+			}
+
+			display_cfg->controller_id = amdgpu_crtc->crtc_id;
+			display_cfg->pixel_clock = conn->pixelclock_for_modeset;
+		}
+	}
+
+	cfg->display_clk = adev->clock.default_dispclk;
+	cfg->num_display = num_crtcs;
+}
drivers/gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h +2 -0
@@ -29,4 +29,6 @@ u32 amdgpu_dpm_get_vblank_time(struct am
 
 u32 amdgpu_dpm_get_vrefresh(struct amdgpu_device *adev);
 
+void amdgpu_dpm_get_display_cfg(struct amdgpu_device *adev);
+
 #endif
drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c +2 -2
@@ -2312,7 +2312,7 @@ static void kv_apply_state_adjust_rules(
 
 		if (pi->sys_info.nb_dpm_enable) {
 			force_high = (mclk >= pi->sys_info.nbp_memory_clock[3]) ||
-				pi->video_start || (adev->pm.dpm.new_active_crtc_count >= 3) ||
+				pi->video_start || (adev->pm.pm_display_cfg.num_display >= 3) ||
 				pi->disable_nb_ps3_in_battery;
 			ps->dpm0_pg_nb_ps_lo = force_high ? 0x2 : 0x3;
 			ps->dpm0_pg_nb_ps_hi = 0x2;
@@ -2371,7 +2371,7 @@ static int kv_calculate_nbps_level_setti
 			return 0;
 
 		force_high = ((mclk >= pi->sys_info.nbp_memory_clock[3]) ||
-			      (adev->pm.dpm.new_active_crtc_count >= 3) || pi->video_start);
+			      (adev->pm.pm_display_cfg.num_display >= 3) || pi->video_start);
 
 		if (force_high) {
 			for (i = pi->lowest_valid; i <= pi->highest_valid; i++)
drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c +3 -3
@@ -797,8 +797,7 @@ static struct amdgpu_ps *amdgpu_dpm_pick
 	int i;
 	struct amdgpu_ps *ps;
 	u32 ui_class;
-	bool single_display = (adev->pm.dpm.new_active_crtc_count < 2) ?
-		true : false;
+	bool single_display = adev->pm.pm_display_cfg.num_display < 2;
 
 	/* check if the vblank period is too short to adjust the mclk */
 	if (single_display && adev->powerplay.pp_funcs->vblank_too_short) {
@@ -1003,7 +1002,8 @@ void amdgpu_legacy_dpm_compute_clocks(vo
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_dpm_get_active_displays(adev);
+	if (!adev->dc_enabled)
+		amdgpu_dpm_get_display_cfg(adev);
 
 	amdgpu_dpm_change_power_state_locked(adev);
 }
drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c +22 -43

150 lines not on this page · raw message

drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c +1 -10
@@ -1568,16 +1568,7 @@ static void pp_pm_compute_clocks(void *h
 	struct amdgpu_device *adev = hwmgr->adev;
 
 	if (!adev->dc_enabled) {
-		amdgpu_dpm_get_active_displays(adev);
-		adev->pm.pm_display_cfg.num_display = adev->pm.dpm.new_active_crtc_count;
-		adev->pm.pm_display_cfg.vrefresh = amdgpu_dpm_get_vrefresh(adev);
-		adev->pm.pm_display_cfg.min_vblank_time = amdgpu_dpm_get_vblank_time(adev);
-		/* we have issues with mclk switching with
-		 * refresh rates over 120 hz on the non-DC code.
-		 */
-		if (adev->pm.pm_display_cfg.vrefresh > 120)
-			adev->pm.pm_display_cfg.min_vblank_time = 0;
-
+		amdgpu_dpm_get_display_cfg(adev);
 		pp_display_configuration_change(handle,
 						&adev->pm.pm_display_cfg);
 	}

Patches currently in stable-queue which might be from [email protected] are

queue-6.1/drm-amdgpu-clarify-dc-checks.patch queue-6.1/drm-amd-pm-use-pm_display_cfg-in-legacy-dpm-v2.patch queue-6.1/drm-amdgpu-use-proper-dc-check-in-amdgpu_display_supported_domains.patch queue-6.1/drm-amd-display-add-pixel_clock-to-amd_pp_display_configuration.patch

maintainer Acked-by on the v3 series
#9 lore raw
In reply to Rosen Penev
Quoted 8 lines · Rosen Penev

Because of incomplete backports to stable kernels, DC ended up breaking on older GCN 1 GPUs. This patchset adds the missing upstream commits to at least fix the panic/black screen on boot.

They are applicable to 6.12, 6.6, and 6.1 as those are the currently supported kernels that 7009e3af0474aca5f64262b3c72fb6e23b232f9b got backported to.

Quoted 5 lines

6.1 needs two extra backports for these two commits to be cherry-picked cleanly. Those are

96ce96f8773da4814622fd97e5226915a2c30706
d09ef243035b75a6d403ebfeb7e87fa20d7e25c6

Regards,
Christian.

Quoted 34 lines

v3: Add those commits to this series and sign them off.
v2: Add Signed-off-by.

Alex Deucher (2):
drm/amdgpu: use proper DC check in amdgpu_display_supported_domains() drm/amdgpu: clarify DC checks

Timur Kristóf (2):
drm/amd/display: Add pixel_clock to amd_pp_display_configuration drm/amd/pm: Use pm_display_cfg in legacy DPM (v2)

 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c      |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c   |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    | 32 ++++-----
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c   |  4 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c       |  2 +-
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  1 +
 .../amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c  |  1 +
 .../dc/clk_mgr/dce110/dce110_clk_mgr.c        |  2 +-
 .../drm/amd/display/dc/dm_services_types.h    |  2 +-
 drivers/gpu/drm/amd/include/dm_pp_interface.h |  1 +
 drivers/gpu/drm/amd/pm/amdgpu_dpm_internal.c  | 67 +++++++++++++++++++
 .../gpu/drm/amd/pm/inc/amdgpu_dpm_internal.h  |  2 +
 drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c    |  4 +-
 .../gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c    |  6 +-
 drivers/gpu/drm/amd/pm/legacy-dpm/si_dpm.c    | 65 ++++++------------
 .../gpu/drm/amd/pm/powerplay/amd_powerplay.c  | 13 +---
 17 files changed, 126 insertions(+), 81 deletions(-)

--
2.53.0