[Intel-gfx] [RFC v5 6/6] drm/i915/dp: Support DP ports YUV 4:2:0 output to GEN11

[Gwan-gyeong Mun]

Bspec describes that GEN10 only supports capability of YUV 4:2:0 output to
HDMI port and GEN11 supports capability of YUV 4:2:0 output to both DP and
HDMI ports.

v2: Minor style fix.

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 40135f98d164..e61181be4c99 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -7418,6 +7418,9 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 		connector->interlace_allowed = true;
 	connector->doublescan_allowed = 0;
 
+	if (INTEL_GEN(dev_priv) >= 11)
+		connector->ycbcr_420_allowed = true;
+
 	intel_encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port);
 
 	intel_dp_aux_init(intel_dp);
-- 
2.21.0