From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
---
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);
--
2.26.2
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