Sink will interrupt source when it have any problem saving or reading
the remote frame buffer.
v3:
disabling PSR instead of exiting on error
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_psr.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index af5fcfd98a53..fd240e45f341 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -1026,6 +1026,20 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp)
psr_disable(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");
+ psr_disable(intel_dp);
+ }
+ if (val & (DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR | DP_PSR_LINK_CRC_ERROR))
+ DRM_ERROR("PSR_ERROR_STATUS not handled %x\n", val);
+ /* 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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