drm/amd/display: fix odm scaling

There are two issues with scaling calculations, odm recout
calculation and matching viewport to actual recout.

This change fixes both issues. Odm recout calculation via
special casing and viewport matching issue by reworking
the viewport calcualtion to use scaling ratios and recout
to derrive the required offset and size.
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@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/dc_types.h

@@ -271,11 +271,6 @@ struct dc_edid_caps {
 	struct dc_panel_patch panel_patch;
 };
 
-struct view {
-	uint32_t width;
-	uint32_t height;
-};
-
 struct dc_mode_flags {
 	/* note: part of refresh rate flag*/
 	uint32_t INTERLACE :1;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp_dscl.c

@@ -631,8 +631,10 @@ static void dpp1_dscl_set_manual_ratio_init(
 		SCL_V_INIT_INT, init_int);
 
 	if (REG(SCL_VERT_FILTER_INIT_BOT)) {
-		init_frac = dc_fixpt_u0d19(data->inits.v_bot) << 5;
-		init_int = dc_fixpt_floor(data->inits.v_bot);
+		struct fixed31_32 bot = dc_fixpt_add(data->inits.v, data->ratios.vert);
+
+		init_frac = dc_fixpt_u0d19(bot) << 5;
+		init_int = dc_fixpt_floor(bot);
 		REG_SET_2(SCL_VERT_FILTER_INIT_BOT, 0,
 			SCL_V_INIT_FRAC_BOT, init_frac,
 			SCL_V_INIT_INT_BOT, init_int);
@@ -645,8 +647,10 @@ static void dpp1_dscl_set_manual_ratio_init(
 		SCL_V_INIT_INT_C, init_int);
 
 	if (REG(SCL_VERT_FILTER_INIT_BOT_C)) {
-		init_frac = dc_fixpt_u0d19(data->inits.v_c_bot) << 5;
-		init_int = dc_fixpt_floor(data->inits.v_c_bot);
+		struct fixed31_32 bot = dc_fixpt_add(data->inits.v_c, data->ratios.vert_c);
+
+		init_frac = dc_fixpt_u0d19(bot) << 5;
+		init_int = dc_fixpt_floor(bot);
 		REG_SET_2(SCL_VERT_FILTER_INIT_BOT_C, 0,
 			SCL_V_INIT_FRAC_BOT_C, init_frac,
 			SCL_V_INIT_INT_BOT_C, init_int);

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -2289,12 +2289,14 @@ int dcn20_populate_dml_pipes_from_context(
 
 			pipes[pipe_cnt].pipe.src.source_scan = pln->rotation == ROTATION_ANGLE_90
 					|| pln->rotation == ROTATION_ANGLE_270 ? dm_vert : dm_horz;
-			pipes[pipe_cnt].pipe.src.viewport_y_y = scl->viewport_unadjusted.y;
-			pipes[pipe_cnt].pipe.src.viewport_y_c = scl->viewport_c_unadjusted.y;
-			pipes[pipe_cnt].pipe.src.viewport_width = scl->viewport_unadjusted.width;
-			pipes[pipe_cnt].pipe.src.viewport_width_c = scl->viewport_c_unadjusted.width;
-			pipes[pipe_cnt].pipe.src.viewport_height = scl->viewport_unadjusted.height;
-			pipes[pipe_cnt].pipe.src.viewport_height_c = scl->viewport_c_unadjusted.height;
+			pipes[pipe_cnt].pipe.src.viewport_y_y = scl->viewport.y;
+			pipes[pipe_cnt].pipe.src.viewport_y_c = scl->viewport_c.y;
+			pipes[pipe_cnt].pipe.src.viewport_width = scl->viewport.width;
+			pipes[pipe_cnt].pipe.src.viewport_width_c = scl->viewport_c.width;
+			pipes[pipe_cnt].pipe.src.viewport_height = scl->viewport.height;
+			pipes[pipe_cnt].pipe.src.viewport_height_c = scl->viewport_c.height;
+			pipes[pipe_cnt].pipe.src.viewport_width_max = pln->src_rect.width;
+			pipes[pipe_cnt].pipe.src.viewport_height_max = pln->src_rect.height;
 			pipes[pipe_cnt].pipe.src.surface_width_y = pln->plane_size.surface_size.width;
 			pipes[pipe_cnt].pipe.src.surface_height_y = pln->plane_size.surface_size.height;
 			pipes[pipe_cnt].pipe.src.surface_width_c = pln->plane_size.chroma_size.width;

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

@@ -253,6 +253,8 @@ struct _vcs_dpi_display_pipe_source_params_st {
 	unsigned int viewport_y_c;
 	unsigned int viewport_width_c;
 	unsigned int viewport_height_c;
+	unsigned int viewport_width_max;
+	unsigned int viewport_height_max;
 	unsigned int data_pitch;
 	unsigned int data_pitch_c;
 	unsigned int meta_pitch;

drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c

@@ -630,6 +630,19 @@ static void fetch_pipe_params(struct display_mode_lib *mode_lib)
 				}
 			}
 		}
+		if (src->viewport_width_max) {
+			int hdiv_c = src->source_format >= dm_420_8 && src->source_format <= dm_422_10 ? 2 : 1;
+			int vdiv_c = src->source_format >= dm_420_8 && src->source_format <= dm_420_12 ? 2 : 1;
+
+			if (mode_lib->vba.ViewportWidth[mode_lib->vba.NumberOfActivePlanes] > src->viewport_width_max)
+				mode_lib->vba.ViewportWidth[mode_lib->vba.NumberOfActivePlanes] = src->viewport_width_max;
+			if (mode_lib->vba.ViewportHeight[mode_lib->vba.NumberOfActivePlanes] > src->viewport_height_max)
+				mode_lib->vba.ViewportHeight[mode_lib->vba.NumberOfActivePlanes] = src->viewport_height_max;
+			if (mode_lib->vba.ViewportWidthChroma[mode_lib->vba.NumberOfActivePlanes] > src->viewport_width_max / hdiv_c)
+				mode_lib->vba.ViewportWidthChroma[mode_lib->vba.NumberOfActivePlanes] = src->viewport_width_max / hdiv_c;
+			if (mode_lib->vba.ViewportHeightChroma[mode_lib->vba.NumberOfActivePlanes] > src->viewport_height_max / vdiv_c)
+				mode_lib->vba.ViewportHeightChroma[mode_lib->vba.NumberOfActivePlanes] = src->viewport_height_max / vdiv_c;
+		}
 
 		if (pipes[k].pipe.src.immediate_flip) {
 			mode_lib->vba.ImmediateFlipSupport = true;

drivers/gpu/drm/amd/display/dc/inc/hw/transform.h

@@ -162,9 +162,7 @@ struct scl_inits {
 	struct fixed31_32 h;
 	struct fixed31_32 h_c;
 	struct fixed31_32 v;
-	struct fixed31_32 v_bot;
 	struct fixed31_32 v_c;
-	struct fixed31_32 v_c_bot;
 };
 
 struct scaler_data {
@@ -173,8 +171,6 @@ struct scaler_data {
 	struct scaling_taps taps;
 	struct rect viewport;
 	struct rect viewport_c;
-	struct rect viewport_unadjusted;
-	struct rect viewport_c_unadjusted;
 	struct rect recout;
 	struct scaling_ratios ratios;
 	struct scl_inits inits;