UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/irq: Make drm_vblank_pre/post_modeset internal 

Now that all drivers are switched over to drm_crtc_vblank_on/off we
can relegate pre/post_modeset to the purely drm_irq.c internal role of
supporting old ums userspace.

As usual switch to the drm_legacy_ prefix to make it clear this is
for old drivers only.

v2: Rebase on top of Thierry's s/int crtc/unsigned int pipe/ changes.

Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter 2016-11-14 10:02:52 +01:00
parent 9bc6db0d91
commit 07600c5363
2 changed files with 6 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/gpu/drm/drm_irq.c
View File

@ -1445,30 +1445,8 @@ void drm_crtc_vblank_on(struct drm_crtc *crtc)
}
EXPORT_SYMBOL(drm_crtc_vblank_on);
/**
* drm_vblank_pre_modeset - account for vblanks across mode sets
* @dev: DRM device
* @pipe: CRTC index
*
* Account for vblank events across mode setting events, which will likely
* reset the hardware frame counter.
*
* This is done by grabbing a temporary vblank reference to ensure that the
* vblank interrupt keeps running across the modeset sequence. With this the
* software-side vblank frame counting will ensure that there are no jumps or
* discontinuities.
*
* Unfortunately this approach is racy and also doesn't work when the vblank
* interrupt stops running, e.g. across system suspend resume. It is therefore
* highly recommended that drivers use the newer drm_vblank_off() and
* drm_vblank_on() instead. drm_vblank_pre_modeset() only works correctly when
* using "cooked" software vblank frame counters and not relying on any hardware
* counters.
*
* Drivers must call drm_vblank_post_modeset() when re-enabling the same crtc
* again.
*/
void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe)
static void drm_legacy_vblank_pre_modeset(struct drm_device *dev,
unsigned int pipe)
{
struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
@ -1492,17 +1470,9 @@ void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe)
vblank->inmodeset |= 0x2;
}
}
EXPORT_SYMBOL(drm_vblank_pre_modeset);
/**
* drm_vblank_post_modeset - undo drm_vblank_pre_modeset changes
* @dev: DRM device
* @pipe: CRTC index
*
* This function again drops the temporary vblank reference acquired in
* drm_vblank_pre_modeset.
*/
void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe)
static void drm_legacy_vblank_post_modeset(struct drm_device *dev,
unsigned int pipe)
{
struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
unsigned long irqflags;
@ -1525,7 +1495,6 @@ void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe)
vblank->inmodeset = 0;
}
}
EXPORT_SYMBOL(drm_vblank_post_modeset);
/*
* drm_modeset_ctl - handle vblank event counter changes across mode switch
@ -1558,10 +1527,10 @@ int drm_modeset_ctl(struct drm_device *dev, void *data,
switch (modeset->cmd) {
case _DRM_PRE_MODESET:
drm_vblank_pre_modeset(dev, pipe);
drm_legacy_vblank_pre_modeset(dev, pipe);
break;
case _DRM_POST_MODESET:
drm_vblank_post_modeset(dev, pipe);
drm_legacy_vblank_post_modeset(dev, pipe);
break;
default:
return -EINVAL;

4
include/drm/drmP.h
View File

@ -727,10 +727,6 @@ void drm_clflush_virt_range(void *addr, unsigned long length);
* DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
*/
/* Modesetting support */
extern void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe);
extern void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe);
/* Debugfs support */
#if defined(CONFIG_DEBUG_FS)
extern int drm_debugfs_create_files(const struct drm_info_list *files,