summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/gpu/drm/i915/intel_dp.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 84bfdd1..0feae90 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -317,9 +317,17 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
else
precharge = 5;
- if (I915_READ(ch_ctl) & DP_AUX_CH_CTL_SEND_BUSY) {
- DRM_ERROR("dp_aux_ch not started status 0x%08x\n",
- I915_READ(ch_ctl));
+ /* Try to wait for any previous AUX channel activity */
+ for (try = 0; try < 3; try++) {
+ status = I915_READ(ch_ctl);
+ if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
+ break;
+ msleep(1);
+ }
+
+ if (try == 3) {
+ WARN(1, "dp_aux_ch not started status 0x%08x\n",
+ I915_READ(ch_ctl));
return -EBUSY;
}
@@ -1690,7 +1698,6 @@ intel_dp_detect(struct drm_connector *connector, bool force)
struct edid *edid = NULL;
intel_dp->has_audio = false;
- memset(intel_dp->dpcd, 0, sizeof(intel_dp->dpcd));
if (HAS_PCH_SPLIT(dev))
status = ironlake_dp_detect(intel_dp);
OpenPOWER on IntegriCloud