diff mbox series

[02/17] drm/dp: use more of the extended receiver cap

Message ID 08326b089b80e394989128f3f3dd362f1972caa8.1629310010.git.jani.nikula@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915/dp: dp 2.0 enabling prep work | expand

Commit Message

Jani Nikula Aug. 18, 2021, 6:10 p.m. UTC 
Extend the use of extended receiver cap at 0x2200 to cover
MAIN_LINK_CHANNEL_CODING_CAP in 0x2206, in case an implementation hides
the DP 2.0 128b/132b channel encoding cap.

Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_dp_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 9b2a2961fca8..9389f92cb944 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -608,7 +608,7 @@  static u8 drm_dp_downstream_port_count(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
 static int drm_dp_read_extended_dpcd_caps(struct drm_dp_aux *aux,
 					  u8 dpcd[DP_RECEIVER_CAP_SIZE])
 {
-	u8 dpcd_ext[6];
+	u8 dpcd_ext[DP_MAIN_LINK_CHANNEL_CODING + 1];
 	int ret;
 
 	/*