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Subject[PATCH AUTOSEL 5.6 61/73] drm/amd/display: Calculate scaling ratios on every medium/full update
Date
From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>

[ 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>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index fc25600107050..188e51600070b 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2349,7 +2349,7 @@ 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;
@@ -2387,6 +2387,17 @@ 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);
--
2.20.1
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