UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Thierry Reding 2015-12-03 13:02:52 +01:00
parent 27ba465ce3
commit 480770440a
1 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/tegra/dp.c
View File

@ -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;