summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/drm_irq.c
diff options
context:
space:
mode:
authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-11-14 10:02:52 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-11-15 23:33:47 +0100
commit07600c536341f3062055548409cc0c8e1a862198 (patch)
treef82aa7c8ec1b94fddfd9135e24b4b94b254a1a7e /drivers/gpu/drm/drm_irq.c
parent9bc6db0d9127d60ed1fc7a548f813f957a3cfd28 (diff)
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>
Diffstat (limited to 'drivers/gpu/drm/drm_irq.c')
-rw-r--r--drivers/gpu/drm/drm_irq.c43
1 files changed, 6 insertions, 37 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 48a6167f5e7b..2fb5861b04b7 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -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;