diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_types.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 20 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 3bd6c8bc4f78..b05eb7478a46 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1344,6 +1344,7 @@ struct intel_dp { u8 lttpr_common_caps[DP_LTTPR_COMMON_CAP_SIZE]; u8 lttpr_phy_caps[DP_MAX_LTTPR_COUNT][DP_LTTPR_PHY_CAP_SIZE]; u8 fec_capable; + u8 pcon_dsc_dpcd[DP_PCON_DSC_ENCODER_CAP_SIZE]; /* source rates */ int num_source_rates; const int *source_rates; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 3e030c4e1a62..0ff2481bb037 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3976,6 +3976,24 @@ cpt_set_link_train(struct intel_dp *intel_dp, intel_de_posting_read(dev_priv, intel_dp->output_reg); } +static void intel_dp_get_pcon_dsc_cap(struct intel_dp *intel_dp) +{ + struct drm_i915_private *i915 = dp_to_i915(intel_dp); + + /* Clear the cached register set to avoid using stale values */ + + memset(intel_dp->pcon_dsc_dpcd, 0, sizeof(intel_dp->pcon_dsc_dpcd)); + + if (drm_dp_dpcd_read(&intel_dp->aux, DP_PCON_DSC_ENCODER, + intel_dp->pcon_dsc_dpcd, + sizeof(intel_dp->pcon_dsc_dpcd)) < 0) + drm_err(&i915->drm, "Failed to read DPCD register 0x%x\n", + DP_PCON_DSC_ENCODER); + + drm_dbg_kms(&i915->drm, "PCON ENCODER DSC DPCD: %*ph\n", + (int)sizeof(intel_dp->pcon_dsc_dpcd), intel_dp->pcon_dsc_dpcd); +} + static int intel_dp_pcon_get_frl_mask(u8 frl_bw_mask) { int bw_gbps[] = {9, 18, 24, 32, 40, 48}; @@ -6708,6 +6726,8 @@ intel_dp_update_dfp(struct intel_dp *intel_dp, intel_dp->dfp.min_tmds_clock, intel_dp->dfp.max_tmds_clock, intel_dp->dfp.pcon_max_frl_bw); + + intel_dp_get_pcon_dsc_cap(intel_dp); } static void |