drm/amd/display: log amdgpu_dm_atomic_check() failure cause

update developers with next level of info about unsupported
display configuration query that led to atomic check failure.
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -10757,8 +10757,10 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 	trace_amdgpu_dm_atomic_check_begin(state);
 
 	ret = drm_atomic_helper_check_modeset(dev, state);
-	if (ret)
+	if (ret) {
+		DRM_DEBUG_DRIVER("drm_atomic_helper_check_modeset() failed\n");
 		goto fail;
+	}
 
 	/* Check connector changes */
 	for_each_oldnew_connector_in_state(state, connector, old_con_state, new_con_state, i) {
@@ -10774,6 +10776,7 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 
 		new_crtc_state = drm_atomic_get_crtc_state(state, new_con_state->crtc);
 		if (IS_ERR(new_crtc_state)) {
+			DRM_DEBUG_DRIVER("drm_atomic_get_crtc_state() failed\n");
 			ret = PTR_ERR(new_crtc_state);
 			goto fail;
 		}
@@ -10788,8 +10791,10 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 		for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
 			if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
 				ret = add_affected_mst_dsc_crtcs(state, crtc);
-				if (ret)
+				if (ret) {
+					DRM_DEBUG_DRIVER("add_affected_mst_dsc_crtcs() failed\n");
 					goto fail;
+				}
 			}
 		}
 	}
@@ -10804,19 +10809,25 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 			continue;
 
 		ret = amdgpu_dm_verify_lut_sizes(new_crtc_state);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("amdgpu_dm_verify_lut_sizes() failed\n");
 			goto fail;
+		}
 
 		if (!new_crtc_state->enable)
 			continue;
 
 		ret = drm_atomic_add_affected_connectors(state, crtc);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("drm_atomic_add_affected_connectors() failed\n");
 			goto fail;
+		}
 
 		ret = drm_atomic_add_affected_planes(state, crtc);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("drm_atomic_add_affected_planes() failed\n");
 			goto fail;
+		}
 
 		if (dm_old_crtc_state->dsc_force_changed)
 			new_crtc_state->mode_changed = true;
@@ -10853,6 +10864,7 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 
 			if (IS_ERR(new_plane_state)) {
 				ret = PTR_ERR(new_plane_state);
+				DRM_DEBUG_DRIVER("new_plane_state is BAD\n");
 				goto fail;
 			}
 		}
@@ -10865,8 +10877,10 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 					    new_plane_state,
 					    false,
 					    &lock_and_validation_needed);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("dm_update_plane_state() failed\n");
 			goto fail;
+		}
 	}
 
 	/* Disable all crtcs which require disable */
@@ -10876,8 +10890,10 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 					   new_crtc_state,
 					   false,
 					   &lock_and_validation_needed);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("DISABLE: dm_update_crtc_state() failed\n");
 			goto fail;
+		}
 	}
 
 	/* Enable all crtcs which require enable */
@@ -10887,8 +10903,10 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 					   new_crtc_state,
 					   true,
 					   &lock_and_validation_needed);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("ENABLE: dm_update_crtc_state() failed\n");
 			goto fail;
+		}
 	}
 
 	/* Add new/modified planes */
@@ -10898,20 +10916,26 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 					    new_plane_state,
 					    true,
 					    &lock_and_validation_needed);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("dm_update_plane_state() failed\n");
 			goto fail;
+		}
 	}
 
 	/* Run this here since we want to validate the streams we created */
 	ret = drm_atomic_helper_check_planes(dev, state);
-	if (ret)
+	if (ret) {
+		DRM_DEBUG_DRIVER("drm_atomic_helper_check_planes() failed\n");
 		goto fail;
+	}
 
 	/* Check cursor planes scaling */
 	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
 		ret = dm_check_crtc_cursor(state, crtc, new_crtc_state);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("dm_check_crtc_cursor() failed\n");
 			goto fail;
+		}
 	}
 
 	if (state->legacy_cursor_update) {
@@ -10998,20 +11022,28 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 	 */
 	if (lock_and_validation_needed) {
 		ret = dm_atomic_get_state(state, &dm_state);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("dm_atomic_get_state() failed\n");
 			goto fail;
+		}
 
 		ret = do_aquire_global_lock(dev, state);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("do_aquire_global_lock() failed\n");
 			goto fail;
+		}
 
 #if defined(CONFIG_DRM_AMD_DC_DCN)
-		if (!compute_mst_dsc_configs_for_state(state, dm_state->context, vars))
+		if (!compute_mst_dsc_configs_for_state(state, dm_state->context, vars)) {
+			DRM_DEBUG_DRIVER("compute_mst_dsc_configs_for_state() failed\n");
 			goto fail;
+		}
 
 		ret = dm_update_mst_vcpi_slots_for_dsc(state, dm_state->context, vars);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("dm_update_mst_vcpi_slots_for_dsc() failed\n");
 			goto fail;
+		}
 #endif
 
 		/*
@@ -11021,12 +11053,13 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 		 * to get stuck in an infinite loop and hang eventually.
 		 */
 		ret = drm_dp_mst_atomic_check(state);
-		if (ret)
+		if (ret) {
+			DRM_DEBUG_DRIVER("drm_dp_mst_atomic_check() failed\n");
 			goto fail;
+		}
 		status = dc_validate_global_state(dc, dm_state->context, false);
 		if (status != DC_OK) {
-			drm_dbg_atomic(dev,
-				       "DC global validation failure: %s (%d)",
+			DRM_DEBUG_DRIVER("DC global validation failure: %s (%d)",
 				       dc_status_to_str(status), status);
 			ret = -EINVAL;
 			goto fail;