drm/msm/dp: program config ctrl for YUV420 over DP

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@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/579615/
Link: https://lore.kernel.org/r/20240222194025.25329-11-quic_parellan@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 320f17fce9a64af04162e43fe75689dd7932472c..ced2ed59ca93665cf7f911142ab62ebfff11639b 100644 (file)
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -142,6 +142,9 @@ 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;