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| author | Stanislav Lisovskiy <stanislav.lisovskiy@intel.com> | 2023-10-24 04:09:25 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2023-11-08 17:22:24 +0200 |
| commit | 99831ab9ce46b1163ac66e92a04614da2da41b1b (patch) | |
| tree | 29888d234e9619bd09262071cc7441f92b6b11d1 /drivers/gpu/drm/i915/display/intel_dp.h | |
| parent | 3a5f80e4ce973c6702ec31e5823502860208e030 (diff) | |
| download | lwn-99831ab9ce46b1163ac66e92a04614da2da41b1b.tar.gz lwn-99831ab9ce46b1163ac66e92a04614da2da41b1b.zip | |
drm/i915: Query compressed bpp properly using correct DPCD and DP Spec info
Currently we seem to be using wrong DPCD register for reading
compressed bpps, reading min/max input bpc instead of compressed bpp.
Fix that, so that we now apply min/max compressed bpp limitations we
get from DP Spec Table 2-157 DP v2.0 and/or correspondent DPCD
register DP_DSC_MAX_BITS_PER_PIXEL_LOW/HIGH.
This might also allow us to get rid of an ugly compressed bpp
recalculation, which we had to add to make some MST hubs usable.
v2: - Fix operator precedence
v3: - Added debug info about compressed bpps
v4: - Don't try to intersect Sink input bpp and compressed bpps.
v5: - Decrease step while looking for suitable compressed bpp to
accommodate.
v6: - Use helper for getting min and max compressed_bpp (Ankit)
v7: - Fix checkpatch warning (Ankit)
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231030155843.2251023-31-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp.h')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h index 91051973be2d..e80da6755419 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.h +++ b/drivers/gpu/drm/i915/display/intel_dp.h @@ -129,6 +129,10 @@ u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915, enum intel_output_format output_format, u32 pipe_bpp, u32 timeslots); +int intel_dp_dsc_sink_min_compressed_bpp(struct intel_crtc_state *pipe_config); +int intel_dp_dsc_sink_max_compressed_bpp(const struct intel_connector *connector, + struct intel_crtc_state *pipe_config, + int bpc); u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector, int mode_clock, int mode_hdisplay, bool bigjoiner); |