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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>
This commit is contained in:
Daniel Vetter 2015-06-18 10:30:27 +02:00
parent ec76d62999
commit 20c8838b0e
3 changed files with 18 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/intel_drv.h
View File

@ -1307,11 +1307,12 @@ void intel_backlight_unregister(struct drm_device *dev);
void intel_psr_enable(struct intel_dp *intel_dp);
void intel_psr_disable(struct intel_dp *intel_dp);
void intel_psr_invalidate(struct drm_device *dev,
unsigned frontbuffer_bits);
unsigned frontbuffer_bits);
void intel_psr_flush(struct drm_device *dev,
unsigned frontbuffer_bits);
unsigned frontbuffer_bits);
void intel_psr_init(struct drm_device *dev);
void intel_psr_single_frame_update(struct drm_device *dev);
void intel_psr_single_frame_update(struct drm_device *dev,
unsigned frontbuffer_bits);
/* intel_runtime_pm.c */
int intel_power_domains_init(struct drm_i915_private *);

2
drivers/gpu/drm/i915/intel_frontbuffer.c
View File

@ -243,7 +243,7 @@ void intel_frontbuffer_flip_prepare(struct drm_device *dev,
dev_priv->fb_tracking.busy_bits &= ~frontbuffer_bits;
mutex_unlock(&dev_priv->fb_tracking.lock);
intel_psr_single_frame_update(dev);
intel_psr_single_frame_update(dev, frontbuffer_bits);
}
/**

22
drivers/gpu/drm/i915/intel_psr.c
View File

@ -596,13 +596,15 @@ static void intel_psr_exit(struct drm_device *dev)
/**
* 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 @@ void intel_psr_single_frame_update(struct drm_device *dev)
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 @@ void intel_psr_single_frame_update(struct drm_device *dev)
* 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 @@ void intel_psr_invalidate(struct drm_device *dev,
* 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;