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drm/dp: Dump downstream facing port caps

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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>
This commit is contained in:
Ville Syrjälä 2020-09-04 14:53:37 +03:00
parent 9f9f4101fc
commit 637f7240f6
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/drm_dp_helper.c
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@ -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;
return ret == len ? 0 : -EIO;
DRM_DEBUG_KMS("%s: DPCD DFP: %*ph\n",
aux->name, len, downstream_ports);
return 0;
}
EXPORT_SYMBOL(drm_dp_read_downstream_info);