diff options
| -rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 11 | ||||
| -rw-r--r-- | include/drm/drm_dp_helper.h | 7 |
3 files changed, 20 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 620d78ff2706..688c475d52b5 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -1179,6 +1179,8 @@ static const struct dpcd_quirk dpcd_quirk_list[] = { { OUI(0x00, 0x00, 0x00), DEVICE_ID('C', 'H', '7', '5', '1', '1'), false, BIT(DP_DPCD_QUIRK_NO_SINK_COUNT) }, /* Synaptics DP1.4 MST hubs can support DSC without virtual DPCD */ { OUI(0x90, 0xCC, 0x24), DEVICE_ID_ANY, true, BIT(DP_DPCD_QUIRK_DSC_WITHOUT_VIRTUAL_DPCD) }, + /* Apple MacBookPro 2017 15 inch eDP Retina panel reports too low DP_MAX_LINK_RATE */ + { OUI(0x00, 0x10, 0xfa), DEVICE_ID(101, 68, 21, 101, 98, 97), false, BIT(DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS) }, }; #undef OUI diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 0a417cd2af2b..ef2e06e292d5 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -164,6 +164,17 @@ static void intel_dp_set_sink_rates(struct intel_dp *intel_dp) }; int i, max_rate; + if (drm_dp_has_quirk(&intel_dp->desc, 0, + DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS)) { + /* Needed, e.g., for Apple MBP 2017, 15 inch eDP Retina panel */ + static const int quirk_rates[] = { 162000, 270000, 324000 }; + + memcpy(intel_dp->sink_rates, quirk_rates, sizeof(quirk_rates)); + intel_dp->num_sink_rates = ARRAY_SIZE(quirk_rates); + + return; + } + max_rate = drm_dp_bw_code_to_link_rate(intel_dp->dpcd[DP_MAX_LINK_RATE]); for (i = 0; i < ARRAY_SIZE(dp_rates); i++) { diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index c5580e988826..4cc4133853c8 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1545,6 +1545,13 @@ enum drm_dp_quirk { * capabilities advertised. */ DP_QUIRK_FORCE_DPCD_BACKLIGHT, + /** + * @DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS: + * + * The device supports a link rate of 3.24 Gbps (multiplier 0xc) despite + * the DP_MAX_LINK_RATE register reporting a lower max multiplier. + */ + DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS, }; /** |