drm/amd/display: fix hsplit viewport calculation for rotated/mirrored usecases

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index d4b338f..e34b52e 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -412,6 +412,8 @@ static void calculate_viewport(struct pipe_ctx *pipe_ctx)
        struct rect clip = {0};
        int vpc_div = (data->format == PIXEL_FORMAT_420BPP12
                        || data->format == PIXEL_FORMAT_420BPP15) ? 2 : 1;
+       bool need_split = (pipe_ctx->top_pipe && pipe_ctx->top_pipe->surface == pipe_ctx->surface)
+               || (pipe_ctx->bottom_pipe && pipe_ctx->bottom_pipe->surface == pipe_ctx->surface);
 
 
        if (surface->rotation == ROTATION_ANGLE_90 ||
@@ -466,17 +468,40 @@ static void calculate_viewport(struct pipe_ctx *pipe_ctx)
        data->viewport_c.height = (data->viewport.height + vpc_div - 1) / vpc_div;
 
        /* Handle hsplit */
-       if (pipe_ctx->top_pipe && pipe_ctx->top_pipe->surface == pipe_ctx->surface) {
-               data->viewport.width /= 2;
-               data->viewport_c.width /= 2;
-               data->viewport.x +=  data->viewport.width;
-               data->viewport_c.x +=  data->viewport_c.width;
-               /* Floor primary pipe, ceil 2ndary pipe */
-               data->viewport.width += data->viewport.width % 2;
-               data->viewport_c.width += data->viewport_c.width % 2;
-       } else if (pipe_ctx->bottom_pipe && pipe_ctx->bottom_pipe->surface == pipe_ctx->surface) {
-               data->viewport.width /= 2;
-               data->viewport_c.width /= 2;
+       if (need_split && (surface->rotation == ROTATION_ANGLE_90 ||
+                               surface->rotation == ROTATION_ANGLE_270)) {
+               bool lower_view = (surface->rotation == ROTATION_ANGLE_270) ^
+                       (pipe_ctx->top_pipe && pipe_ctx->top_pipe->surface == pipe_ctx->surface);
+
+               if (lower_view) {
+                       data->viewport.height /= 2;
+                       data->viewport_c.height /= 2;
+                       data->viewport.y +=  data->viewport.height;
+                       data->viewport_c.y +=  data->viewport_c.height;
+                       /* Ceil offset pipe */
+                       data->viewport.height += data->viewport.height % 2;
+                       data->viewport_c.height += data->viewport_c.height % 2;
+               } else {
+                       data->viewport.height /= 2;
+                       data->viewport_c.height /= 2;
+               }
+       } else if (need_split) {
+               bool right_view = (surface->rotation == ROTATION_ANGLE_180) ^
+                       (pipe_ctx->top_pipe && pipe_ctx->top_pipe->surface == pipe_ctx->surface) ^
+                       surface->horizontal_mirror;
+
+               if (right_view) {
+                       data->viewport.width /= 2;
+                       data->viewport_c.width /= 2;
+                       data->viewport.x +=  data->viewport.width;
+                       data->viewport_c.x +=  data->viewport_c.width;
+                       /* Ceil offset pipe */
+                       data->viewport.width += data->viewport.width % 2;
+                       data->viewport_c.width += data->viewport_c.width % 2;
+               } else {
+                       data->viewport.width /= 2;
+                       data->viewport_c.width /= 2;
+               }
        }
 }