drm/i915/psr: Restrict single-shot updates to the PSR pipe
The frontbuffer code gives us accurate information about activity,
let's use it. Again this should avoid unecessary updates when multiple
screens are on.
Also realign function paramaters, I couldn't resist that bit of OCD.
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Durgadoss R <durgadoss.r@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index e354cea..d79ba58 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -596,13 +596,15 @@
/**
* intel_psr_single_frame_update - Single Frame Update
* @dev: DRM device
+ * @frontbuffer_bits: frontbuffer plane tracking bits
*
* Some platforms support a single frame update feature that is used to
* send and update only one frame on Remote Frame Buffer.
* So far it is only implemented for Valleyview and Cherryview because
* hardware requires this to be done before a page flip.
*/
-void intel_psr_single_frame_update(struct drm_device *dev)
+void intel_psr_single_frame_update(struct drm_device *dev,
+ unsigned frontbuffer_bits)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;
@@ -624,14 +626,16 @@
crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc;
pipe = to_intel_crtc(crtc)->pipe;
- val = I915_READ(VLV_PSRCTL(pipe));
- /*
- * We need to set this bit before writing registers for a flip.
- * This bit will be self-clear when it gets to the PSR active state.
- */
- I915_WRITE(VLV_PSRCTL(pipe), val | VLV_EDP_PSR_SINGLE_FRAME_UPDATE);
+ if (frontbuffer_bits & INTEL_FRONTBUFFER_ALL_MASK(pipe)) {
+ val = I915_READ(VLV_PSRCTL(pipe));
+ /*
+ * We need to set this bit before writing registers for a flip.
+ * This bit will be self-clear when it gets to the PSR active state.
+ */
+ I915_WRITE(VLV_PSRCTL(pipe), val | VLV_EDP_PSR_SINGLE_FRAME_UPDATE);
+ }
mutex_unlock(&dev_priv->psr.lock);
}
@@ -648,7 +652,7 @@
* Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits."
*/
void intel_psr_invalidate(struct drm_device *dev,
- unsigned frontbuffer_bits)
+ unsigned frontbuffer_bits)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;
@@ -685,7 +689,7 @@
* Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits.
*/
void intel_psr_flush(struct drm_device *dev,
- unsigned frontbuffer_bits)
+ unsigned frontbuffer_bits)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;