On Wednesday, October 3, 2018 1:50:30 PM PDT José Roberto de Souza wrote:
> For PSR2 there is no register to tell HW to keep main link enabled
> while PSR2 is active, so don't configure sink DPCD with a
> wrong value.
>
> v4: rebased on top of the patch removing link standby from debugfs
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_psr.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_psr.c
> b/drivers/gpu/drm/i915/intel_psr.c index 423cdf84059c..26317a4e03d2 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -346,12 +346,14 @@ static void intel_psr_enable_sink(struct intel_dp
> *intel_dp) drm_dp_dpcd_writeb(&intel_dp->aux, DP_RECEIVER_ALPM_CONFIG,
> DP_ALPM_ENABLE);
> dpcd_val |= DP_PSR_ENABLE_PSR2;
> + } else {
> + if (dev_priv->psr.link_standby)
> + dpcd_val |= DP_PSR_MAIN_LINK_ACTIVE;
> +
> + if (INTEL_GEN(dev_priv) >= 8)
> + dpcd_val |= DP_PSR_CRC_VERIFICATION;
> }
>
> - if (dev_priv->psr.link_standby)
> - dpcd_val |= DP_PSR_MAIN_LINK_ACTIVE;
> - if (!dev_priv->psr.psr2_enabled && INTEL_GEN(dev_priv) >= 8)
> - dpcd_val |= DP_PSR_CRC_VERIFICATION;
> drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, dpcd_val);
>
> drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
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