diff options
| author | Imre Deak <imre.deak@intel.com> | 2024-06-11 18:33:51 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2024-06-13 17:31:48 +0300 |
| commit | efde66b9654830170f46667a8f0ddf16fae6dbef (patch) | |
| tree | ab7801f912da16d56e3e216f92005601dd8ee386 /drivers/gpu/drm/i915/display/intel_dp_mst.c | |
| parent | 5a5bdc17a2fc8dabfcf630bed84d4fbca0985c3a (diff) | |
drm/i915/dp_mst: Fix DSC input BPP computation
The branch or sink device decompressing a stream may have a limitation
on the input/uncompressed BPP, which is lower than the base line BPP
(determined by the sink's EDID). In some cases a stream with an input
BPP higher than this limit will be converted automatically by the device
decompressing the stream, by truncating the BPP, however in some cases
- seen at least in Dell dock's DP->HDMI converters - the decompression
will fail.
Fix the above by limiting the input BPP correctly. This is done already
correctly for SST outputs.
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611153351.3013235-1-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_mst.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_mst.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index c3c889a5b7ee..6fd0511ab7dd 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -349,6 +349,8 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder, if (max_bpp > sink_max_bpp) max_bpp = sink_max_bpp; + crtc_state->pipe_bpp = max_bpp; + max_compressed_bpp = intel_dp_dsc_sink_max_compressed_bpp(connector, crtc_state, max_bpp / 3); |