drm/amd/display: Calculate scaling ratios on every medium/full update

[ Upstream commit 3bae20137cae6c03f58f96c0bc9f3d46f0bc17d4 ]

[Why]
If a plane isn't being actively enabled or disabled then DC won't
always recalculate scaling rects and ratios for the primary plane.

This results in only a partial or corrupted rect being displayed on
the screen instead of scaling to fit the screen.

[How]
Add back the logic to recalculate the scaling rects into
dc_commit_updates_for_stream since this is the expected place to
do it in DC.

This was previously removed a few years ago to fix an underscan issue
but underscan is still functional now with this change - and it should
be, since this is only updating to the latest plane state getting passed
in.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 89bd0ba..71c574d 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2154,7 +2154,7 @@ void dc_commit_updates_for_stream(struct dc *dc,
        enum surface_update_type update_type;
        struct dc_state *context;
        struct dc_context *dc_ctx = dc->ctx;
-       int i;
+       int i, j;
 
        stream_status = dc_stream_get_status(stream);
        context = dc->current_state;
@@ -2192,6 +2192,17 @@ void dc_commit_updates_for_stream(struct dc *dc,
 
                copy_surface_update_to_plane(surface, &srf_updates[i]);
 
+               if (update_type >= UPDATE_TYPE_MED) {
+                       for (j = 0; j < dc->res_pool->pipe_count; j++) {
+                               struct pipe_ctx *pipe_ctx =
+                                       &context->res_ctx.pipe_ctx[j];
+
+                               if (pipe_ctx->plane_state != surface)
+                                       continue;
+
+                               resource_build_scaling_params(pipe_ctx);
+                       }
+               }
        }
 
        copy_stream_update_to_stream(dc, context, stream, stream_update);