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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2020-09-04 13:53:37 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2020-09-17 16:02:08 +0200 |
| commit | 637f7240f602c078070cd2373845b7a80b59ae3f (patch) | |
| tree | 9e08f0893f5526f52b865505867f0301ee55acc3 /drivers/gpu/drm/drm_dp_helper.c | |
| parent | drm/i915/selftests: Push the fake iommu device from the stack to data (diff) | |
| download | linux-637f7240f602c078070cd2373845b7a80b59ae3f.tar.xz linux-637f7240f602c078070cd2373845b7a80b59ae3f.zip | |
drm/dp: Dump downstream facing port caps
It helps when the logs have a dump of the DFP capabilities.
v2: Move the dumping to the new helper
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200904115354.25336-2-ville.syrjala@linux.intel.com
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/drm_dp_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 1e7c638873c8..c21bbfc3d714 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -545,8 +545,13 @@ int drm_dp_read_downstream_info(struct drm_dp_aux *aux, ret = drm_dp_dpcd_read(aux, DP_DOWNSTREAM_PORT_0, downstream_ports, len); if (ret < 0) return ret; + if (ret != len) + return -EIO; + + DRM_DEBUG_KMS("%s: DPCD DFP: %*ph\n", + aux->name, len, downstream_ports); - return ret == len ? 0 : -EIO; + return 0; } EXPORT_SYMBOL(drm_dp_read_downstream_info); |