commit 480770440ad1681e5100e9719fc5f9bb8bc46ca8
author Thierry Reding <treding@nvidia.com> Thu Dec 03 13:02:52 2015 +0100
committer Thierry Reding <treding@nvidia.com> Mon Oct 28 11:18:44 2019 +0100
tree 8f9a3cc66a525a3acbb5462472772dd5287596bb
parent 27ba465ce3397c4705f87c1f73e6d67c1b48ef0f

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

Use existing parsing helpers to probe a DisplayPort link.

Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/dp.c

diff --git a/drivers/gpu/drm/tegra/dp.c b/drivers/gpu/drm/tegra/dp.c
index e7602fc..f9234f6 100644
--- a/drivers/gpu/drm/tegra/dp.c
+++ b/drivers/gpu/drm/tegra/dp.c
@@ -47,21 +47,20 @@
  */
 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;