[PATCH v3 10/19] drm/msm/dp: program config ctrl for YUV420 over DP

[Paloma Arellano]

Change relevant DP controller related programming for YUV420 cases.
Program the configuration control register to indicate YUV420.

Changes in v2:
	- Create a new patch only for configuration control programming

Signed-off-by: Paloma Arellano <quic_parellan at quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_ctrl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 77a8d9366ed7b..da8f0d9f98718 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -128,6 +128,9 @@ static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl)
 	/* Default-> LSCLK DIV: 1/4 LCLK  */
 	config |= (2 << DP_CONFIGURATION_CTRL_LSCLK_DIV_SHIFT);
 
+	if (ctrl->panel->dp_mode.out_fmt_is_yuv_420)
+		config |= DP_CONFIGURATION_CTRL_RGB_YUV; /* YUV420 */
+
 	/* Scrambler reset enable */
 	if (drm_dp_alternate_scrambler_reset_cap(dpcd))
 		config |= DP_CONFIGURATION_CTRL_ASSR;
-- 
2.39.2