[PATCH 1/9] drm/i915/psr: Do not activate PSR on frontbuffer flush from fbdev.

[Dhinakaran Pandiyan]

There is no corresponding invalidate call before the buffer is written
to, this results in screen freezing sometime after switching to console
mode with PSR enabled. Invalidating the front buffer in the fbdev call
backs won't work either as some of them are called in atomic contexts and
{drrs, fbc, psr}_invalidate all sleep. So don't activate PSR for now.

Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
---
 drivers/gpu/drm/i915/intel_psr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index e9feffdea899..c12af1118647 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -881,6 +881,9 @@ void intel_psr_flush(struct drm_i915_private *dev_priv,
 	if (!CAN_PSR(dev_priv))
 		return;
 
+	if (origin == ORIGIN_DIRTYFB)
+		return;
+
 	mutex_lock(&dev_priv->psr.lock);
 	if (!dev_priv->psr.enabled) {
 		mutex_unlock(&dev_priv->psr.lock);
-- 
2.14.1