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drm: unexport function drm_vblank_no_hw_counter() 

The function drm_vblank_no_hw_counter() is now only used in core vblank
wrapper code.  Let's unexport it by making it a static function.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1486458995-31018-4-git-send-email-shawnguo@kernel.org
This commit is contained in:
Shawn Guo 2017-02-07 17:16:15 +08:00 committed by Daniel Vetter
parent 967dd48417
commit 5ac74757ee
3 changed files with 13 additions and 23 deletions
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28
drivers/gpu/drm/drm_irq.c
View File

@ -89,6 +89,16 @@ static void store_vblank(struct drm_device *dev, unsigned int pipe,
write_sequnlock(&vblank->seqlock);
}
/*
* "No hw counter" fallback implementation of .get_vblank_counter() hook,
* if there is no useable hardware frame counter available.
*/
static u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe)
{
WARN_ON_ONCE(dev->max_vblank_count != 0);
return 0;
}
static u32 __get_vblank_counter(struct drm_device *dev, unsigned int pipe)
{
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
@ -1748,21 +1758,3 @@ bool drm_crtc_handle_vblank(struct drm_crtc *crtc)
return drm_handle_vblank(crtc->dev, drm_crtc_index(crtc));
}
EXPORT_SYMBOL(drm_crtc_handle_vblank);
/**
* drm_vblank_no_hw_counter - "No hw counter" implementation of .get_vblank_counter()
* @dev: DRM device
* @pipe: CRTC for which to read the counter
*
* Drivers can plug this into the .get_vblank_counter() function if
* there is no useable hardware frame counter available.
*
* Returns:
* 0
*/
u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe)
{
WARN_ON_ONCE(dev->max_vblank_count != 0);
return 0;
}
EXPORT_SYMBOL(drm_vblank_no_hw_counter);

7
include/drm/drm_drv.h
View File

@ -120,10 +120,9 @@ struct drm_driver {
*
* Driver callback for fetching a raw hardware vblank counter for the
* CRTC specified with the pipe argument. If a device doesn't have a
* hardware counter, the driver can simply use
* drm_vblank_no_hw_counter() function. The DRM core will account for
* missed vblank events while interrupts where disabled based on system
* timestamps.
* hardware counter, the driver can simply leave the hook as NULL.
* The DRM core will account for missed vblank events while interrupts
* where disabled based on system timestamps.
*
* Wraparound handling and loss of events due to modesetting is dealt
* with in the DRM core code, as long as drivers call

1
include/drm/drm_irq.h
View File

@ -152,7 +152,6 @@ void drm_crtc_vblank_reset(struct drm_crtc *crtc);
void drm_crtc_vblank_on(struct drm_crtc *crtc);
void drm_vblank_cleanup(struct drm_device *dev);
u32 drm_accurate_vblank_count(struct drm_crtc *crtc);
u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe);
int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
unsigned int pipe, int *max_error,