drm/amd/display: fix PIP bugs on Dal3

[Why]
There are outstanding bugs for PIP in Dal3:
-Crash when toggling PIP visibility
-Global Alpha is not working, Adjusting global alpha
 doesn’t have an effect
-Cursor is not working with pip plane and pipe splits
-One flash occurs when cursor enters PIP plane from
 top/bottom
-Crash when moving PIP plane off the screen

[How]
Resolve divide by 0 error
Implement global alpha
Program cursor on all pipes
Add dst rects' x and y offests into cursor position
Disable cursor when it is beyond bottom/top edge

Signed-off-by: Gloria Li <geling.li@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Gloria Li

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

@@ -1106,6 +1106,9 @@ static enum surface_update_type get_plane_info_update_type(const struct dc_surfa
 	if (u->plane_info->per_pixel_alpha != u->surface->per_pixel_alpha)
 		update_flags->bits.per_pixel_alpha_change = 1;
 
+	if (u->plane_info->global_alpha_value != u->surface->global_alpha_value)
+		update_flags->bits.global_alpha_change = 1;
+
 	if (u->plane_info->dcc.enable != u->surface->dcc.enable
 			|| u->plane_info->dcc.grph.independent_64b_blks != u->surface->dcc.grph.independent_64b_blks
 			|| u->plane_info->dcc.grph.meta_pitch != u->surface->dcc.grph.meta_pitch)

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

@@ -589,8 +589,10 @@ static void calculate_viewport(struct pipe_ctx *pipe_ctx)
 		data->viewport.width = (data->viewport.width + 1) / 2;
 		data->viewport_c.width = (data->viewport_c.width + 1) / 2;
 	} else if (pri_split) {
-		data->viewport.width /= 2;
-		data->viewport_c.width /= 2;
+		if (data->viewport.width > 1)
+			data->viewport.width /= 2;
+		if (data->viewport_c.width > 1)
+			data->viewport_c.width /= 2;
 	}
 
 	if (plane_state->rotation == ROTATION_ANGLE_90 ||
@@ -670,7 +672,8 @@ static void calculate_recout(struct pipe_ctx *pipe_ctx, struct rect *recout_full
 			pipe_ctx->plane_res.scl_data.recout.width =
 					(pipe_ctx->plane_res.scl_data.recout.width + 1) / 2;
 		} else {
-			pipe_ctx->plane_res.scl_data.recout.width /= 2;
+			if (pipe_ctx->plane_res.scl_data.recout.width > 1)
+				pipe_ctx->plane_res.scl_data.recout.width /= 2;
 		}
 	}
 	/* Unclipped recout offset = stream dst offset + ((surf dst offset - stream surf_src offset)

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

@@ -205,8 +205,6 @@ bool dc_stream_set_cursor_attributes(
 
 		if (pipe_ctx->stream != stream)
 			continue;
-		if (pipe_ctx->top_pipe && pipe_ctx->plane_state != pipe_ctx->top_pipe->plane_state)
-			continue;
 
 		if (!pipe_to_program) {
 			pipe_to_program = pipe_ctx;

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

@@ -442,6 +442,7 @@ union surface_update_flags {
 		uint32_t color_space_change:1;
 		uint32_t horizontal_mirror_change:1;
 		uint32_t per_pixel_alpha_change:1;
+		uint32_t global_alpha_change:1;
 		uint32_t rotation_change:1;
 		uint32_t swizzle_change:1;
 		uint32_t scaling_change:1;
@@ -496,6 +497,8 @@ struct dc_plane_state {
 
 	bool is_tiling_rotated;
 	bool per_pixel_alpha;
+	bool global_alpha;
+	int  global_alpha_value;
 	bool visible;
 	bool flip_immediate;
 	bool horizontal_mirror;
@@ -522,6 +525,8 @@ struct dc_plane_info {
 	bool horizontal_mirror;
 	bool visible;
 	bool per_pixel_alpha;
+	bool global_alpha;
+	int  global_alpha_value;
 	bool input_csc_enabled;
 };
 

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c

@@ -444,10 +444,12 @@ void dpp1_set_cursor_position(
 		struct dpp *dpp_base,
 		const struct dc_cursor_position *pos,
 		const struct dc_cursor_mi_param *param,
-		uint32_t width)
+		uint32_t width,
+		uint32_t height)
 {
 	struct dcn10_dpp *dpp = TO_DCN10_DPP(dpp_base);
 	int src_x_offset = pos->x - pos->x_hotspot - param->viewport.x;
+	int src_y_offset = pos->y - pos->y_hotspot - param->viewport.y;
 	uint32_t cur_en = pos->enable ? 1 : 0;
 
 	if (src_x_offset >= (int)param->viewport.width)
@@ -456,6 +458,12 @@ void dpp1_set_cursor_position(
 	if (src_x_offset + (int)width <= 0)
 		cur_en = 0;  /* not visible beyond left edge*/
 
+	if (src_y_offset >= (int)param->viewport.height)
+		cur_en = 0;  /* not visible beyond bottom edge*/
+
+	if (src_y_offset < 0)
+		cur_en = 0;  /* not visible beyond top edge*/
+
 	REG_UPDATE(CURSOR0_CONTROL,
 			CUR0_ENABLE, cur_en);
 

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.h

@@ -1374,7 +1374,8 @@ void dpp1_set_cursor_position(
 		struct dpp *dpp_base,
 		const struct dc_cursor_position *pos,
 		const struct dc_cursor_mi_param *param,
-		uint32_t width);
+		uint32_t width,
+		uint32_t height);
 
 void dpp1_cnv_set_optional_cursor_attributes(
 			struct dpp *dpp_base,

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c

@@ -1070,6 +1070,7 @@ void hubp1_cursor_set_position(
 {
 	struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
 	int src_x_offset = pos->x - pos->x_hotspot - param->viewport.x;
+	int src_y_offset = pos->y - pos->y_hotspot - param->viewport.y;
 	int x_hotspot = pos->x_hotspot;
 	int y_hotspot = pos->y_hotspot;
 	uint32_t dst_x_offset;
@@ -1113,6 +1114,12 @@ void hubp1_cursor_set_position(
 	if (src_x_offset + (int)hubp->curs_attr.width <= 0)
 		cur_en = 0;  /* not visible beyond left edge*/
 
+	if (src_y_offset >= (int)param->viewport.height)
+		cur_en = 0;  /* not visible beyond bottom edge*/
+
+	if (src_y_offset < 0) //+ (int)hubp->curs_attr.height
+		cur_en = 0;  /* not visible beyond top edge*/
+
 	if (cur_en && REG_READ(CURSOR_SURFACE_ADDRESS) == 0)
 		hubp->funcs->set_cursor_attributes(hubp, &hubp->curs_attr);
 

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -1932,9 +1932,13 @@ static void dcn10_update_mpcc(struct dc *dc, struct pipe_ctx *pipe_ctx)
 		blnd_cfg.alpha_mode = MPCC_ALPHA_BLEND_MODE_GLOBAL_ALPHA;
 
 	blnd_cfg.overlap_only = false;
-	blnd_cfg.global_alpha = 0xff;
 	blnd_cfg.global_gain = 0xff;
 
+	if (pipe_ctx->plane_state->global_alpha)
+		blnd_cfg.global_alpha = pipe_ctx->plane_state->global_alpha_value;
+	else
+		blnd_cfg.global_alpha = 0xff;
+
 	/* DCN1.0 has output CM before MPC which seems to screw with
 	 * pre-multiplied alpha.
 	 */
@@ -2049,11 +2053,13 @@ static void update_dchubp_dpp(
 		update_dpp(dpp, plane_state);
 
 	if (plane_state->update_flags.bits.full_update ||
-		plane_state->update_flags.bits.per_pixel_alpha_change)
+		plane_state->update_flags.bits.per_pixel_alpha_change ||
+		plane_state->update_flags.bits.global_alpha_change)
 		dc->hwss.update_mpcc(dc, pipe_ctx);
 
 	if (plane_state->update_flags.bits.full_update ||
 		plane_state->update_flags.bits.per_pixel_alpha_change ||
+		plane_state->update_flags.bits.global_alpha_change ||
 		plane_state->update_flags.bits.scaling_change ||
 		plane_state->update_flags.bits.position_change) {
 		update_scaler(pipe_ctx);
@@ -2597,15 +2603,15 @@ static void dcn10_set_cursor_position(struct pipe_ctx *pipe_ctx)
 		.mirror = pipe_ctx->plane_state->horizontal_mirror
 	};
 
+	pos_cpy.x -= pipe_ctx->plane_state->dst_rect.x;
+	pos_cpy.y -= pipe_ctx->plane_state->dst_rect.y;
+
 	if (pipe_ctx->plane_state->address.type
 			== PLN_ADDR_TYPE_VIDEO_PROGRESSIVE)
 		pos_cpy.enable = false;
 
-	if (pipe_ctx->top_pipe && pipe_ctx->plane_state != pipe_ctx->top_pipe->plane_state)
-		pos_cpy.enable = false;
-
 	hubp->funcs->set_cursor_position(hubp, &pos_cpy, &param);
-	dpp->funcs->set_cursor_position(dpp, &pos_cpy, &param, hubp->curs_attr.width);
+	dpp->funcs->set_cursor_position(dpp, &pos_cpy, &param, hubp->curs_attr.width, hubp->curs_attr.height);
 }
 
 static void dcn10_set_cursor_attribute(struct pipe_ctx *pipe_ctx)

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

@@ -147,7 +147,8 @@ struct dpp_funcs {
 			struct dpp *dpp_base,
 			const struct dc_cursor_position *pos,
 			const struct dc_cursor_mi_param *param,
-			uint32_t width
+			uint32_t width,
+			uint32_t height
 			);
 	void (*dpp_set_hdr_multiplier)(
 			struct dpp *dpp_base,