On Wed, 2017-08-30 at 17:32 -0700, Radhakrishna Sripada wrote:
> Some platforms donot support PSR and DRRS simultaneously. Deferring
> to PSR when both PSR and DRRS are supported by the panel.
> 
> Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=101111

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101111

"Fixes: <commit>" is only used to -fixes cherry-picks. Not a case for
this patch.

> Cc: Nicholas Stommel <[email protected]>
> Cc: Dhinakaran Pandiyan <[email protected]>
> Cc: Jani Nikula <[email protected]>
> Cc: Clinton Taylor <[email protected]>
> Cc: Rodrigo Vivi <[email protected]>
> Signed-off-by: Radhakrishna Sripada <[email protected]>
> ---
>  drivers/gpu/drm/i915/intel_dp.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index d3e5fdf0d2fa..dc7a6721e0dd 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -5469,11 +5469,6 @@ static void intel_dp_set_drrs_state(struct 
> drm_i915_private *dev_priv,
>               return;
>       }
>  
> -     /*
> -      * FIXME: This needs proper synchronization with psr state for some
> -      * platforms that cannot have PSR and DRRS enabled at the same time.
> -      */
> -
>       dig_port = dp_to_dig_port(intel_dp);
>       encoder = &dig_port->base;
>       intel_crtc = to_intel_crtc(encoder->base.crtc);
> @@ -5557,6 +5552,11 @@ void intel_edp_drrs_enable(struct intel_dp *intel_dp,
>               return;
>       }
>  
> +     if (dev_priv->psr.enabled != NULL) {

        if (dev_priv->psr.enabled) {
?

> +             DRM_DEBUG_KMS("PSR active. Disabling DRRS.\n");
> +             return;
> +     }
> +
>       mutex_lock(&dev_priv->drrs.mutex);
>       if (WARN_ON(dev_priv->drrs.dp)) {
>               DRM_ERROR("DRRS already enabled\n");

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