diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_frontbuffer.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_psr.c | 42 |
3 files changed, 45 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 6a2ee0c38161..082be7161203 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1294,6 +1294,7 @@ void intel_psr_invalidate(struct drm_device *dev, void intel_psr_flush(struct drm_device *dev, unsigned frontbuffer_bits); void intel_psr_init(struct drm_device *dev); +void intel_psr_single_frame_update(struct drm_device *dev); /* intel_runtime_pm.c */ int intel_power_domains_init(struct drm_i915_private *); diff --git a/drivers/gpu/drm/i915/intel_frontbuffer.c b/drivers/gpu/drm/i915/intel_frontbuffer.c index a20cffb78c0f..57095f54c1f2 100644 --- a/drivers/gpu/drm/i915/intel_frontbuffer.c +++ b/drivers/gpu/drm/i915/intel_frontbuffer.c @@ -243,6 +243,8 @@ void intel_frontbuffer_flip_prepare(struct drm_device *dev, /* Remove stale busy bits due to the old buffer. */ dev_priv->fb_tracking.busy_bits &= ~frontbuffer_bits; mutex_unlock(&dev_priv->fb_tracking.lock); + + intel_psr_single_frame_update(dev); } /** diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 5cd374b4a07e..5ee0fa57ed19 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -594,6 +594,48 @@ static void intel_psr_exit(struct drm_device *dev) } /** + * intel_psr_single_frame_update - Single Frame Update + * @dev: DRM device + * + * 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) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_crtc *crtc; + enum pipe pipe; + u32 val; + + /* + * Single frame update is already supported on BDW+ but it requires + * many W/A and it isn't really needed. + */ + if (!IS_VALLEYVIEW(dev)) + return; + + mutex_lock(&dev_priv->psr.lock); + if (!dev_priv->psr.enabled) { + mutex_unlock(&dev_priv->psr.lock); + return; + } + + 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); + + mutex_unlock(&dev_priv->psr.lock); +} + +/** * intel_psr_invalidate - Invalidade PSR * @dev: DRM device * @frontbuffer_bits: frontbuffer plane tracking bits |