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drm/i915/psr: Restrict single-shot updates to the PSR pipe

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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
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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;