diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-02-08 17:45:52 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-02-09 14:23:22 +0200 |
| commit | 6061811d72e14f41f71b6a025510920b187bfcca (patch) | |
| tree | 39a9df5c71c98042b7152dcf34219c17c6dc8d91 | |
| parent | 6074be620c31dc2ae11af96a1a5ea95580976fb5 (diff) | |
drm/i915/dp: Limit SST link rate to <=8.1Gbps
Limit the link rate to HBR3 or below (<=8.1Gbps) in SST mode.
UHBR (10Gbps+) link rates require 128b/132b channel encoding
which we have not yet hooked up into the SST/no-sideband codepaths.
Cc: stable@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240208154552.14545-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index ab415f41924d..5045c34a16be 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2356,6 +2356,9 @@ intel_dp_compute_config_limits(struct intel_dp *intel_dp, limits->min_rate = intel_dp_common_rate(intel_dp, 0); limits->max_rate = intel_dp_max_link_rate(intel_dp); + /* FIXME 128b/132b SST support missing */ + limits->max_rate = min(limits->max_rate, 810000); + limits->min_lane_count = 1; limits->max_lane_count = intel_dp_max_lane_count(intel_dp); |