diff options
| author | Imre Deak <imre.deak@intel.com> | 2025-12-15 22:23:41 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2025-12-19 17:45:44 +0300 |
| commit | cc1b753487bb23e5a1c96c9864d515690e15b605 (patch) | |
| tree | 69058d3cfb12944ffbe575cbf701ccd9a1f89490 | |
| parent | 6a3591522930897c3fdb326c5d48b906b5c30b71 (diff) | |
| download | linux-cc1b753487bb23e5a1c96c9864d515690e15b605.tar.xz | |
drm/dp: Parse all DSC slice count caps for eDP 1.5
eDP 1.5 supports all the slice counts reported via DP_DSC_SLICE_CAP_1,
so adjust drm_dp_dsc_sink_max_slice_count() accordingly.
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251215192357.172201-2-imre.deak@intel.com
| -rw-r--r-- | drivers/gpu/drm/display/drm_dp_helper.c | 41 |
1 files changed, 18 insertions, 23 deletions
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index f9fdf19de74a..19564c1afba6 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -2725,15 +2725,7 @@ u8 drm_dp_dsc_sink_max_slice_count(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE], { u8 slice_cap1 = dsc_dpcd[DP_DSC_SLICE_CAP_1 - DP_DSC_SUPPORT]; - if (is_edp) { - /* For eDP, register DSC_SLICE_CAPABILITIES_1 gives slice count */ - if (slice_cap1 & DP_DSC_4_PER_DP_DSC_SINK) - return 4; - if (slice_cap1 & DP_DSC_2_PER_DP_DSC_SINK) - return 2; - if (slice_cap1 & DP_DSC_1_PER_DP_DSC_SINK) - return 1; - } else { + if (!is_edp) { /* For DP, use values from DSC_SLICE_CAP_1 and DSC_SLICE_CAP2 */ u8 slice_cap2 = dsc_dpcd[DP_DSC_SLICE_CAP_2 - DP_DSC_SUPPORT]; @@ -2743,22 +2735,25 @@ u8 drm_dp_dsc_sink_max_slice_count(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE], return 20; if (slice_cap2 & DP_DSC_16_PER_DP_DSC_SINK) return 16; - if (slice_cap1 & DP_DSC_12_PER_DP_DSC_SINK) - return 12; - if (slice_cap1 & DP_DSC_10_PER_DP_DSC_SINK) - return 10; - if (slice_cap1 & DP_DSC_8_PER_DP_DSC_SINK) - return 8; - if (slice_cap1 & DP_DSC_6_PER_DP_DSC_SINK) - return 6; - if (slice_cap1 & DP_DSC_4_PER_DP_DSC_SINK) - return 4; - if (slice_cap1 & DP_DSC_2_PER_DP_DSC_SINK) - return 2; - if (slice_cap1 & DP_DSC_1_PER_DP_DSC_SINK) - return 1; } + /* DP, eDP v1.5+ */ + if (slice_cap1 & DP_DSC_12_PER_DP_DSC_SINK) + return 12; + if (slice_cap1 & DP_DSC_10_PER_DP_DSC_SINK) + return 10; + if (slice_cap1 & DP_DSC_8_PER_DP_DSC_SINK) + return 8; + if (slice_cap1 & DP_DSC_6_PER_DP_DSC_SINK) + return 6; + /* DP, eDP v1.4+ */ + if (slice_cap1 & DP_DSC_4_PER_DP_DSC_SINK) + return 4; + if (slice_cap1 & DP_DSC_2_PER_DP_DSC_SINK) + return 2; + if (slice_cap1 & DP_DSC_1_PER_DP_DSC_SINK) + return 1; + return 0; } EXPORT_SYMBOL(drm_dp_dsc_sink_max_slice_count); |