Merge tag 'amd-drm-next-6.15-2025-03-14' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

amd-drm-next-6.15-2025-03-14:

amdgpu:
- GC 12.x DCC fixes
- VCN 2.5 fix
- Replay/PSR fixes
- HPD fixes
- DMUB fixes
- Backlight fixes
- DM suspend/resume cleanup
- Misc DC fixes
- HDCP UAF fix
- Misc code cleanups
- VCE 2.x fix
- Wedged event support
- GC 12.x PTE fixes
- Misc multimedia cap fixes
- Enable unique id support for GC 12.x
- XGMI code cleanup
- GC 11.x and 12.x MQD cleanups
- SMU 13.x updates
- SMU 14.x fan speed reporting
- Enable VCN activity reporting for additional chips
- SR-IOV fixes
- RAS fixes
- MES fixes

amdkfd:
- Dequeue wait count API cleanups
- Queue eviction cleanup fixes
- Retry fault fixes
- Dequeue retry timeout adjustments
- GC 12.x trap handler fixes
- GC 9.5.x updates

radeon:
- VCE command parser fix

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250314170618.3142042-1-alexander.deucher@amd.com

1 files changed, 32 insertions, 5 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 6a54f1cfa125..4f1cf8afe25f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -250,6 +250,10 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector);
 static void handle_hpd_rx_irq(void *param);
 
+static void amdgpu_dm_backlight_set_level(struct amdgpu_display_manager *dm,
+					 int bl_idx,
+					 u32 user_brightness);
+
 static bool
 is_timing_unchanged_for_freesync(struct drm_crtc_state *old_crtc_state,
 				 struct drm_crtc_state *new_crtc_state);
@@ -3137,6 +3141,21 @@ static void hpd_rx_irq_work_suspend(struct amdgpu_display_manager *dm)
 	}
 }
 
+static int dm_prepare_suspend(struct amdgpu_ip_block *ip_block)
+{
+	struct amdgpu_device *adev = ip_block->adev;
+
+	if (amdgpu_in_reset(adev))
+		return 0;
+
+	WARN_ON(adev->dm.cached_state);
+	adev->dm.cached_state = drm_atomic_helper_suspend(adev_to_drm(adev));
+	if (IS_ERR(adev->dm.cached_state))
+		return PTR_ERR(adev->dm.cached_state);
+
+	return 0;
+}
+
 static int dm_suspend(struct amdgpu_ip_block *ip_block)
 {
 	struct amdgpu_device *adev = ip_block->adev;
@@ -3167,10 +3186,11 @@ static int dm_suspend(struct amdgpu_ip_block *ip_block)
 		return 0;
 	}
 
-	WARN_ON(adev->dm.cached_state);
-	adev->dm.cached_state = drm_atomic_helper_suspend(adev_to_drm(adev));
-	if (IS_ERR(adev->dm.cached_state))
-		return PTR_ERR(adev->dm.cached_state);
+	if (!adev->dm.cached_state) {
+		adev->dm.cached_state = drm_atomic_helper_suspend(adev_to_drm(adev));
+		if (IS_ERR(adev->dm.cached_state))
+			return PTR_ERR(adev->dm.cached_state);
+	}
 
 	s3_handle_hdmi_cec(adev_to_drm(adev), true);
 
@@ -3432,6 +3452,12 @@ static int dm_resume(struct amdgpu_ip_block *ip_block)
 
 		mutex_unlock(&dm->dc_lock);
 
+		/* set the backlight after a reset */
+		for (i = 0; i < dm->num_of_edps; i++) {
+			if (dm->backlight_dev[i])
+				amdgpu_dm_backlight_set_level(dm, i, dm->brightness[i]);
+		}
+
 		return 0;
 	}
 
@@ -3596,6 +3622,7 @@ static const struct amd_ip_funcs amdgpu_dm_funcs = {
 	.early_fini = amdgpu_dm_early_fini,
 	.hw_init = dm_hw_init,
 	.hw_fini = dm_hw_fini,
+	.prepare_suspend = dm_prepare_suspend,
 	.suspend = dm_suspend,
 	.resume = dm_resume,
 	.is_idle = dm_is_idle,
@@ -4986,6 +5013,7 @@ amdgpu_dm_register_backlight_device(struct amdgpu_dm_connector *aconnector)
 	dm->backlight_dev[aconnector->bl_idx] =
 		backlight_device_register(bl_name, aconnector->base.kdev, dm,
 					  &amdgpu_dm_backlight_ops, &props);
+	dm->brightness[aconnector->bl_idx] = props.brightness;
 
 	if (IS_ERR(dm->backlight_dev[aconnector->bl_idx])) {
 		DRM_ERROR("DM: Backlight registration failed!\n");
@@ -5053,7 +5081,6 @@ static void setup_backlight_device(struct amdgpu_display_manager *dm,
 	aconnector->bl_idx = bl_idx;
 
 	amdgpu_dm_update_backlight_caps(dm, bl_idx);
-	dm->brightness[bl_idx] = AMDGPU_MAX_BL_LEVEL;
 	dm->backlight_link[bl_idx] = link;
 	dm->num_of_edps++;