[PATCH] drm/amd/display: add FB_DAMAGE_CLIPS support

[Hamza Mahfooz <hamza.mahfooz@amd.com>]

Currently, userspace doesn't have a way to communicate selective updates
to displays. So, enable support for FB_DAMAGE_CLIPS for DCN ASICs newer
than DCN301, convert DRM damage clips to dc dirty rectangles and fill
them into dirty_rects in fill_dc_dirty_rects().

Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 91 +++++++++++--------
 .../amd/display/amdgpu_dm/amdgpu_dm_plane.c   |  4 +
 2 files changed, 58 insertions(+), 37 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 185d09c760ba..18b710ba802d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4842,6 +4842,31 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
 	return 0;
 }
 
+static inline void fill_dc_dirty_rect(struct drm_plane *plane,
+				      struct rect *dirty_rect, int32_t x,
+				      int32_t y, int32_t width, int32_t height,
+				      int *i, bool ffu)
+{
+	WARN_ON(*i >= DC_MAX_DIRTY_RECTS);
+
+	dirty_rect->x = x;
+	dirty_rect->y = y;
+	dirty_rect->width = width;
+	dirty_rect->height = height;
+
+	if (ffu)
+		drm_dbg(plane->dev,
+			"[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n",
+			plane->base.id, width, height);
+	else
+		drm_dbg(plane->dev,
+			"[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)",
+			plane->base.id, x, y, width, height);
+
+	(*i)++;
+}
+
+
 /**
  * fill_dc_dirty_rects() - Fill DC dirty regions for PSR selective updates
  *
@@ -4862,10 +4887,6 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
  * addition, certain use cases - such as cursor and multi-plane overlay (MPO) -
  * implicitly provide damage clips without any client support via the plane
  * bounds.
- *
- * Today, amdgpu_dm only supports the MPO and cursor usecase.
- *
- * TODO: Also enable for FB_DAMAGE_CLIPS
  */
 static void fill_dc_dirty_rects(struct drm_plane *plane,
 				struct drm_plane_state *old_plane_state,
@@ -4876,12 +4897,11 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
 	struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state);
 	struct rect *dirty_rects = flip_addrs->dirty_rects;
 	uint32_t num_clips;
+	struct drm_mode_rect *clips;
 	bool bb_changed;
 	bool fb_changed;
 	uint32_t i = 0;
 
-	flip_addrs->dirty_rect_count = 0;
-
 	/*
 	 * Cursor plane has it's own dirty rect update interface. See
 	 * dcn10_dmub_update_cursor_data and dmub_cmd_update_cursor_info_data
@@ -4894,15 +4914,11 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
 	 * requested, and there is a plane update, do FFU.
 	 */
 	if (!dm_crtc_state->mpo_requested) {
-		dirty_rects[0].x = 0;
-		dirty_rects[0].y = 0;
-		dirty_rects[0].width = dm_crtc_state->base.mode.crtc_hdisplay;
-		dirty_rects[0].height = dm_crtc_state->base.mode.crtc_vdisplay;
-		flip_addrs->dirty_rect_count = 1;
-		DRM_DEBUG_DRIVER("[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n",
-				 new_plane_state->plane->base.id,
-				 dm_crtc_state->base.mode.crtc_hdisplay,
-				 dm_crtc_state->base.mode.crtc_vdisplay);
+		fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[0], 0,
+				   0, dm_crtc_state->base.mode.crtc_hdisplay,
+				   dm_crtc_state->base.mode.crtc_vdisplay, &i,
+				   true);
+		flip_addrs->dirty_rect_count = i;
 		return;
 	}
 
@@ -4914,6 +4930,7 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
 	 * rects.
 	 */
 	num_clips = drm_plane_get_damage_clips_count(new_plane_state);
+	clips = drm_plane_get_damage_clips(new_plane_state);
 	fb_changed = old_plane_state->fb->base.id !=
 		     new_plane_state->fb->base.id;
 	bb_changed = (old_plane_state->crtc_x != new_plane_state->crtc_x ||
@@ -4921,33 +4938,33 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
 		      old_plane_state->crtc_w != new_plane_state->crtc_w ||
 		      old_plane_state->crtc_h != new_plane_state->crtc_h);
 
-	DRM_DEBUG_DRIVER("[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n",
-			 new_plane_state->plane->base.id,
-			 bb_changed, fb_changed, num_clips);
+	drm_dbg(plane->dev,
+		"[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n",
+		new_plane_state->plane->base.id,
+		bb_changed, fb_changed, num_clips);
 
-	if (num_clips || fb_changed || bb_changed) {
-		dirty_rects[i].x = new_plane_state->crtc_x;
-		dirty_rects[i].y = new_plane_state->crtc_y;
-		dirty_rects[i].width = new_plane_state->crtc_w;
-		dirty_rects[i].height = new_plane_state->crtc_h;
-		DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)\n",
-				 new_plane_state->plane->base.id,
-				 dirty_rects[i].x, dirty_rects[i].y,
-				 dirty_rects[i].width, dirty_rects[i].height);
-		i += 1;
+	if (num_clips) {
+		for (; i < num_clips; i++, clips++) {
+			fill_dc_dirty_rect(new_plane_state->plane,
+					   &dirty_rects[i], clips->x1,
+					   clips->y1, clips->x2 - clips->x1,
+					   clips->y2 - clips->y1, &i, false);
+		}
+	} else if (fb_changed || bb_changed) {
+		fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i],
+				   new_plane_state->crtc_x,
+				   new_plane_state->crtc_y,
+				   new_plane_state->crtc_w,
+				   new_plane_state->crtc_h, &i, false);
 	}
 
 	/* Add old plane bounding-box if plane is moved or resized */
 	if (bb_changed) {
-		dirty_rects[i].x = old_plane_state->crtc_x;
-		dirty_rects[i].y = old_plane_state->crtc_y;
-		dirty_rects[i].width = old_plane_state->crtc_w;
-		dirty_rects[i].height = old_plane_state->crtc_h;
-		DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)\n",
-				old_plane_state->plane->base.id,
-				dirty_rects[i].x, dirty_rects[i].y,
-				dirty_rects[i].width, dirty_rects[i].height);
-		i += 1;
+		fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i],
+				   old_plane_state->crtc_x,
+				   old_plane_state->crtc_y,
+				   old_plane_state->crtc_w,
+				   old_plane_state->crtc_h, &i, false);
 	}
 
 	flip_addrs->dirty_rect_count = i;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index e6854f7270a6..3c50b3ff7954 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -1600,6 +1600,10 @@ int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
 		drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
 						   supported_rotations);
 
+	if (dm->adev->ip_versions[DCE_HWIP][0] > IP_VERSION(3, 0, 1) &&
+	    plane->type != DRM_PLANE_TYPE_CURSOR)
+		drm_plane_enable_fb_damage_clips(plane);
+
 	drm_plane_helper_add(plane, &dm_plane_helper_funcs);
 
 #ifdef CONFIG_DRM_AMD_DC_HDR
-- 
2.38.1