Commit 553769ff authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: dp: Set channel coding on link configuration 



Make use of ANSI 8B/10B channel coding if the DisplayPort sink supports
it.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent ad7f2dda

drivers/gpu/drm/tegra/dp.c

+10 −1
Original line number Diff line number Diff line
@@ -203,7 +203,7 @@ int drm_dp_link_power_down(struct drm_dp_aux *aux, struct drm_dp_link *link) 
 */

int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link)

{

	u8 values[2];

	u8 values[2], value;

	int err;



	values[0] = drm_dp_link_rate_to_bw_code(link->rate);
@@ -216,5 +216,14 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link) 
	if (err < 0)

		return err;



	if (link->caps.channel_coding)

		value = DP_SET_ANSI_8B10B;

	else

		value = 0;



	err = drm_dp_dpcd_writeb(aux, DP_MAIN_LINK_CHANNEL_CODING_SET, value);

	if (err < 0)

		return err;



	return 0;

}