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
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) {
+               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");
-- 
2.9.3

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