Sink will interrupt source when it have any PSR error.
DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR is a PSR2 but already
handling it here and DP_PSR_LINK_CRC_ERROR should never
happen as it needs to be enable in sink and source.
v5:
handling all PSR errors here, so the commit message and
comment have changed
v3:
disabling PSR instead of exiting on error
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_psr.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 768931fa634d..0f4aa4d55275 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -1009,6 +1009,9 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp)
struct drm_i915_private *dev_priv = to_i915(dev);
struct i915_psr *psr = &dev_priv->psr;
u8 val;
+ const u8 errors = DP_PSR_RFB_STORAGE_ERROR |
+ DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR |
+ DP_PSR_LINK_CRC_ERROR;
if (!CAN_PSR(dev_priv) || !intel_dp_is_edp(intel_dp))
return;
@@ -1028,6 +1031,25 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp)
intel_psr_disable_locked(intel_dp);
}
+ if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_ERROR_STATUS, &val) != 1) {
+ DRM_ERROR("PSR_ERROR_STATUS dpcd read failed\n");
+ goto exit;
+ }
+
+ if (val & DP_PSR_RFB_STORAGE_ERROR)
+ DRM_DEBUG_KMS("PSR RFB storage error, exiting PSR\n");
+ if (val & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR)
+ DRM_DEBUG_KMS("PSR VSC SDP uncorrectable error, exiting PSR\n");
+ if (val & DP_PSR_LINK_CRC_ERROR)
+ DRM_ERROR("PSR Link CRC error, exiting PSR\n");
+ if (val & ~errors)
+ DRM_ERROR("PSR_ERROR_STATUS unhandled errors %x\n",
+ val & ~errors);
+ if (val & errors)
+ intel_psr_disable_locked(intel_dp);
+ /* clear status register */
+ drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_ERROR_STATUS, val);
+
/* TODO: handle other PSR/PSR2 errors */
exit:
mutex_unlock(&psr->lock);
--
2.17.1
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