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drm/i915/dp: Simplify computing forced DSC BPP for DP-SST

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If dsc_compute_compressed_bpp() failed with a forced pipe BPP value
(where the forced pipe BPP value itself is valid within the min/max pipe
BPP limits), the function will also fail when called with the maximum
pipe BPP value: dsc_compute_compressed_bpp() will try all compressed
BPPs below the passed in pipe BPP value and if the function failed with
a given (low) compressed BPP value it will also fail with a compressed
BPP value higher than the one which failed already.

Based on the above remove the logic to retry computing a compressed BPP
value with the maximum pipe BPP value if computing the compressed BPP
failed already with the (lower) forced pipe BPP value.

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251222153547.713360-18-imre.deak@intel.com
This commit is contained in:
Imre Deak
2025-12-22 17:35:44 +02:00
parent ce46682f89
commit 2b68b9b80f
1 changed files with 4 additions and 10 deletions
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14
drivers/gpu/drm/i915/display/intel_dp.c
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@@ -2299,17 +2299,11 @@ static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
int ret;
forced_bpp = intel_dp_force_dsc_pipe_bpp(intel_dp, limits);
if (forced_bpp)
pipe_bpp = forced_bpp;
else
pipe_bpp = limits->pipe.max_bpp;
if (forced_bpp) {
ret = dsc_compute_compressed_bpp(intel_dp, pipe_config, conn_state,
limits, forced_bpp);
if (ret == 0) {
pipe_config->pipe_bpp = forced_bpp;
return 0;
}
}
pipe_bpp = limits->pipe.max_bpp;
ret = dsc_compute_compressed_bpp(intel_dp, pipe_config, conn_state,
limits, pipe_bpp);
if (ret)