From: Shubhangi Shrivastava <[email protected]>
Since commit 30d9aa4265fe ("drm/i915: Read sink_count dpcd always"),
the status of a DP connector depends on its sink count value.
However, some eDP panels don't set that value appropriately,
causing them to be reported as disconnected.
Fix this by ignoring sink count for eDP.
v2: Rephrased commit message. (Ander)
In case of eDP, returning status as connected if DPCD
read succeeds to avoid any further operations.
Fixes: 30d9aa4265fe ("drm/i915: Read sink_count dpcd always")
Cc: Ander Conselvan De Oliveira <[email protected]>
Cc: Jani Nikula <[email protected]>
Reported-by: Tvrtko Ursulin <[email protected]>
Signed-off-by: Sivakumar Thulasimani <[email protected]>
Signed-off-by: Shubhangi Shrivastava <[email protected]>
Tested-by: Tvrtko Ursulin <[email protected]>
Reviewed-by: Ander Conselvan de Oliveira <[email protected]>
Signed-off-by: Ander Conselvan de Oliveira
<[email protected]>
Link:
http://patchwork.freedesktop.org/patch/msgid/1460444034-22320-1-git-send-email-shubhangi.shrivast...@intel.com
---
drivers/gpu/drm/i915/intel_dp.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6c6f95a2..460c421 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3776,7 +3776,7 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
* downstream port information. So, an early return here saves
* time from performing other operations which are not required.
*/
- if (!intel_dp->sink_count)
+ if (!is_edp(intel_dp) && !intel_dp->sink_count)
return false;
/* Check if the panel supports PSR */
@@ -4309,6 +4309,9 @@ intel_dp_detect_dpcd(struct intel_dp *intel_dp)
if (!intel_dp_get_dpcd(intel_dp))
return connector_status_disconnected;
+ if (is_edp(intel_dp))
+ return connector_status_connected;
+
/* if there's no downstream port, we're done */
if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT))
return connector_status_connected;
--
2.4.11
_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
