[Intel-gfx] [PATCH 1/2] drm/i915/dsc/mtl: Update the DSC minor version

Jani Nikula
2022-08-17T12:45:51Z

From: Vandita Kulkarni <vandita.kulkarni@intel.com>

From MTL onwards we support DSC1.2, since there is hardcoding
to minor version 1, update it.

Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
drivers/gpu/drm/i915/display/intel_dp.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 32292c0be2bd..db5f536bde05 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1377,7 +1377,18 @@ static int intel_dp_dsc_compute_bpp(struct intel_dp *intel_dp, u8 max_req_bpc)
return 0;
}

-#define DSC_SUPPORTED_VERSION_MIN 1
+static int intel_dp_source_dsc_version_minor(struct intel_dp *intel_dp)
+{
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+ return DISPLAY_VER(i915) >= 14 ? 2 : 1;
+}
+
+static int intel_dp_sink_dsc_version_minor(struct intel_dp *intel_dp)
+{
+ return (intel_dp->dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] & DP_DSC_MINOR_MASK) >>
+ DP_DSC_MINOR_SHIFT;
+}

static int intel_dp_dsc_compute_params(struct intel_encoder *encoder,
struct intel_crtc_state *crtc_state)
@@ -1416,9 +1427,8 @@ static int intel_dp_dsc_compute_params(struct intel_encoder *encoder,
(intel_dp->dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] &
DP_DSC_MAJOR_MASK) >> DP_DSC_MAJOR_SHIFT;
vdsc_cfg->dsc_version_minor =
- min(DSC_SUPPORTED_VERSION_MIN,
- (intel_dp->dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] &
- DP_DSC_MINOR_MASK) >> DP_DSC_MINOR_SHIFT);
+ min(intel_dp_source_dsc_version_minor(intel_dp),
+ intel_dp_sink_dsc_version_minor(intel_dp));

vdsc_cfg->convert_rgb = intel_dp->dsc_dpcd[DP_DSC_DEC_COLOR_FORMAT_CAP - DP_DSC_SUPPORT] &
DP_DSC_RGB;
--
2.34.1