On Thu, 2018-05-17 at 15:21 -0700, José Roberto de Souza wrote:
> 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: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> 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 60797c8f9f0e..f72e3f91809f 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -1046,6 +1046,20 @@ 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);
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