From: Ville Syrjälä ville.syrjala@linux.intel.com
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 --- drivers/gpu/drm/drm_dp_helper.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
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;
- 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);