Commit 48077044 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: dp: Probe link using existing parsing helpers 



Use existing parsing helpers to probe a DisplayPort link.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 27ba465c

drivers/gpu/drm/tegra/dp.c

+6 −7
Original line number Diff line number Diff line
@@ -47,21 +47,20 @@ static void drm_dp_link_reset(struct drm_dp_link *link) 
 */

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

{

	u8 values[3];

	u8 dpcd[DP_RECEIVER_CAP_SIZE];

	int err;



	drm_dp_link_reset(link);



	err = drm_dp_dpcd_read(aux, DP_DPCD_REV, values, sizeof(values));

	err = drm_dp_dpcd_read(aux, DP_DPCD_REV, dpcd, sizeof(dpcd));

	if (err < 0)

		return err;



	link->revision = values[0];

	link->max_rate = drm_dp_bw_code_to_link_rate(values[1]);

	link->max_lanes = values[2] & DP_MAX_LANE_COUNT_MASK;

	link->revision = dpcd[DP_DPCD_REV];

	link->max_rate = drm_dp_max_link_rate(dpcd);

	link->max_lanes = drm_dp_max_lane_count(dpcd);



	if (values[2] & DP_ENHANCED_FRAME_CAP)

		link->caps.enhanced_framing = true;

	link->caps.enhanced_framing = drm_dp_enhanced_frame_cap(dpcd);



	link->rate = link->max_rate;

	link->lanes = link->max_lanes;