drm/amd/display: Enable HW rotation

[Why] HW rotation is not enabled. Calculations for cursor rotation
are wrong for the values passed to set_cursor_position.

[How] Swap Src rect and height and vertically mirror surface for
the correct surface rotation direction. Cursor position is rotated
according to angle. Offset calculations are tweaked for non-rotated
cursor hotspot and width/height.
Signed-off-by: Jaehyun Chung <jaehyun.chung@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -457,6 +457,19 @@ void dpp1_set_cursor_position(
 	int src_y_offset = pos->y - pos->y_hotspot - param->viewport.y;
 	uint32_t cur_en = pos->enable ? 1 : 0;
 
+	// Cursor width/height and hotspots need to be rotated for offset calculation
+	if (param->rotation == ROTATION_ANGLE_90 || param->rotation == ROTATION_ANGLE_270) {
+		swap(width, height);
+		if (param->rotation == ROTATION_ANGLE_90) {
+			src_x_offset = pos->x - pos->y_hotspot - param->viewport.x;
+			src_y_offset = pos->y - pos->x_hotspot - param->viewport.y;
+		}
+	} else if (param->rotation == ROTATION_ANGLE_180) {
+		src_x_offset = pos->x - param->viewport.x;
+		src_y_offset = pos->y - param->viewport.y;
+	}
+
+
 	if (src_x_offset >= (int)param->viewport.width)
 		cur_en = 0;  /* not visible beyond right edge*/
 

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

@@ -2976,6 +2976,40 @@ static void dcn10_set_cursor_position(struct pipe_ctx *pipe_ctx)
 			== PLN_ADDR_TYPE_VIDEO_PROGRESSIVE)
 		pos_cpy.enable = false;
 
+	// Swap axis and mirror horizontally
+	if (param.rotation == ROTATION_ANGLE_90) {
+		uint32_t temp_x = pos_cpy.x;
+		pos_cpy.x = pipe_ctx->plane_res.scl_data.viewport.width -
+				(pos_cpy.y - pipe_ctx->plane_res.scl_data.viewport.x) + pipe_ctx->plane_res.scl_data.viewport.x;
+		pos_cpy.y = temp_x;
+	}
+	// Swap axis and mirror vertically
+	else if (param.rotation == ROTATION_ANGLE_270) {
+		uint32_t temp_y = pos_cpy.y;
+		if (pos_cpy.x >  pipe_ctx->plane_res.scl_data.viewport.height) {
+			pos_cpy.x = pos_cpy.x - pipe_ctx->plane_res.scl_data.viewport.height;
+			pos_cpy.y = pipe_ctx->plane_res.scl_data.viewport.height - pos_cpy.x;
+		} else {
+			pos_cpy.y = 2 * pipe_ctx->plane_res.scl_data.viewport.height - pos_cpy.x;
+		}
+		pos_cpy.x = temp_y;
+	}
+	// Mirror horizontally and vertically
+	else if (param.rotation == ROTATION_ANGLE_180) {
+		if (pos_cpy.x >= pipe_ctx->plane_res.scl_data.viewport.width + pipe_ctx->plane_res.scl_data.viewport.x) {
+			pos_cpy.x = 2 * pipe_ctx->plane_res.scl_data.viewport.width
+					- pos_cpy.x + 2 * pipe_ctx->plane_res.scl_data.viewport.x;
+		} else {
+			uint32_t temp_x = pos_cpy.x;
+			pos_cpy.x = 2 * pipe_ctx->plane_res.scl_data.viewport.x - pos_cpy.x;
+			if (temp_x >= pipe_ctx->plane_res.scl_data.viewport.x + (int)hubp->curs_attr.width
+					|| pos_cpy.x <= (int)hubp->curs_attr.width + pipe_ctx->plane_state->src_rect.x) {
+				pos_cpy.x = temp_x + pipe_ctx->plane_res.scl_data.viewport.width;
+			}
+		}
+		pos_cpy.y = pipe_ctx->plane_res.scl_data.viewport.height - pos_cpy.y;
+	}
+
 	hubp->funcs->set_cursor_position(hubp, &pos_cpy, &param);
 	dpp->funcs->set_cursor_position(dpp, &pos_cpy, &param, hubp->curs_attr.width, hubp->curs_attr.height);
 }

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubp.c

@@ -945,6 +945,8 @@ void hubp2_cursor_set_position(
 	int src_y_offset = pos->y - pos->y_hotspot - param->viewport.y;
 	int x_hotspot = pos->x_hotspot;
 	int y_hotspot = pos->y_hotspot;
+	int cursor_height = (int)hubp->curs_attr.height;
+	int cursor_width = (int)hubp->curs_attr.width;
 	uint32_t dst_x_offset;
 	uint32_t cur_en = pos->enable ? 1 : 0;
 
@@ -958,10 +960,16 @@ void hubp2_cursor_set_position(
 	if (hubp->curs_attr.address.quad_part == 0)
 		return;
 
+	// Rotated cursor width/height and hotspots tweaks for offset calculation
 	if (param->rotation == ROTATION_ANGLE_90 || param->rotation == ROTATION_ANGLE_270) {
-		src_x_offset = pos->y - pos->y_hotspot - param->viewport.x;
-		y_hotspot = pos->x_hotspot;
-		x_hotspot = pos->y_hotspot;
+		swap(cursor_height, cursor_width);
+		if (param->rotation == ROTATION_ANGLE_90) {
+			src_x_offset = pos->x - pos->y_hotspot - param->viewport.x;
+			src_y_offset = pos->y - pos->x_hotspot - param->viewport.y;
+		}
+	} else if (param->rotation == ROTATION_ANGLE_180) {
+		src_x_offset = pos->x - param->viewport.x;
+		src_y_offset = pos->y - param->viewport.y;
 	}
 
 	if (param->mirror) {
@@ -983,13 +991,13 @@ void hubp2_cursor_set_position(
 	if (src_x_offset >= (int)param->viewport.width)
 		cur_en = 0;  /* not visible beyond right edge*/
 
-	if (src_x_offset + (int)hubp->curs_attr.width <= 0)
+	if (src_x_offset + cursor_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 + (int)hubp->curs_attr.height <= 0)
+	if (src_y_offset + cursor_height <= 0)
 		cur_en = 0;  /* not visible beyond top edge*/
 
 	if (cur_en && REG_READ(CURSOR_SURFACE_ADDRESS) == 0)