drm/amd/display: treat plane clip size change as MED update type

[why]
When clip size is changed recout and viewport size would require an
update. When the update is clip size only current driver fails to
program the update into hardware.

[how]
Set a new clip_size_change flag when it is detected and set MED update
type and reprogram scaling params in next program pipe.
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -2454,6 +2454,10 @@ static enum surface_update_type get_scaling_info_update_type(
 		 /* Changing clip size of a large surface may result in MPC slice count change */
 		update_flags->bits.bandwidth_change = 1;
 
+	if (u->scaling_info->clip_rect.width != u->surface->clip_rect.width ||
+			u->scaling_info->clip_rect.height != u->surface->clip_rect.height)
+		update_flags->bits.clip_size_change = 1;
+
 	if (u->scaling_info->src_rect.x != u->surface->src_rect.x
 			|| u->scaling_info->src_rect.y != u->surface->src_rect.y
 			|| u->scaling_info->clip_rect.x != u->surface->clip_rect.x
@@ -2467,7 +2471,8 @@ static enum surface_update_type get_scaling_info_update_type(
 			|| update_flags->bits.scaling_change)
 		return UPDATE_TYPE_FULL;
 
-	if (update_flags->bits.position_change)
+	if (update_flags->bits.position_change ||
+			update_flags->bits.clip_size_change)
 		return UPDATE_TYPE_MED;
 
 	return UPDATE_TYPE_FAST;

drivers/gpu/drm/amd/display/dc/dc.h

@@ -1252,6 +1252,7 @@ union surface_update_flags {
 		uint32_t rotation_change:1;
 		uint32_t swizzle_change:1;
 		uint32_t scaling_change:1;
+		uint32_t clip_size_change: 1;
 		uint32_t position_change:1;
 		uint32_t in_transfer_func_change:1;
 		uint32_t input_csc_change:1;

drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c

@@ -1740,6 +1740,7 @@ static void dcn20_update_dchubp_dpp(
 	if (pipe_ctx->update_flags.bits.scaler ||
 			plane_state->update_flags.bits.scaling_change ||
 			plane_state->update_flags.bits.position_change ||
+			plane_state->update_flags.bits.clip_size_change ||
 			plane_state->update_flags.bits.per_pixel_alpha_change ||
 			pipe_ctx->stream->update_flags.bits.scaling) {
 		pipe_ctx->plane_res.scl_data.lb_params.alpha_en = pipe_ctx->plane_state->per_pixel_alpha;
@@ -1752,6 +1753,7 @@ static void dcn20_update_dchubp_dpp(
 	if (pipe_ctx->update_flags.bits.viewport ||
 			(context == dc->current_state && plane_state->update_flags.bits.position_change) ||
 			(context == dc->current_state && plane_state->update_flags.bits.scaling_change) ||
+			(context == dc->current_state && plane_state->update_flags.bits.clip_size_change) ||
 			(context == dc->current_state && pipe_ctx->stream->update_flags.bits.scaling)) {
 
 		hubp->funcs->mem_program_viewport(