diff options
| author | Mario Kleiner <mario.kleiner.de@gmail.com> | 2021-06-02 23:45:56 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-06-04 19:40:01 +0300 |
| commit | 72a7cf0aec0c450033a79be22646028b7bc1d792 (patch) | |
| tree | dbe9b7c5067d86eb324eb64474ca749d787be02b /drivers | |
| parent | c45d9400a08a4c8e84a3a35adc7533d877e42ffe (diff) | |
| download | linux-72a7cf0aec0c450033a79be22646028b7bc1d792.tar.xz | |
drm/amd/display: Keep linebuffer pixel depth at 30bpp for DCE-11.0.
Testing on AMD Carizzo with DCE-11.0 display engine showed that
it doesn't like a 36 bpp linebuffer very much. The display just
showed a solid green.
Testing on RavenRidge DCN-1.0, Polaris11 with DCE-11.2 and Kabini
with DCE-8.3 did not expose any problems, so for now only revert
to 30 bpp linebuffer depth on asics with DCE-11.0 display engine.
Fixes: a316db72096044 ("drm/amd/display: Increase linebuffer pixel depth to 36bpp.")
Reported-by: Tom StDenis <Tom.StDenis@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 11 |
1 files changed, 9 insertions, 2 deletions
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 cd864cc83539..6d96fec01aca 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -1042,9 +1042,16 @@ bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx) * on certain displays, such as the Sharp 4k. 36bpp is needed * to support SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616 and * SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616 with actual > 10 bpc - * precision on at least DCN display engines. + * precision on at least DCN display engines. However, at least + * Carrizo with DCE_VERSION_11_0 does not like 36 bpp lb depth, + * so use only 30 bpp on DCE_VERSION_11_0. Testing with DCE 11.2 and 8.3 + * did not show such problems, so this seems to be the exception. */ - pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_36BPP; + if (plane_state->ctx->dce_version != DCE_VERSION_11_0) + pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_36BPP; + else + pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_30BPP; + pipe_ctx->plane_res.scl_data.lb_params.alpha_en = plane_state->per_pixel_alpha; if (pipe_ctx->plane_res.xfm != NULL) |