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authorDaniel Vetter <daniel.vetter@ffwll.ch>2014-09-10 17:36:10 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2014-09-11 13:38:48 +0200
commitfb446a1acdb981921de06bfde3a2178da7174481 (patch)
tree7ad2ab06442121ff46e4590437e1a3c69bff0181 /drivers/gpu/drm
parentdrm: Only update final vblank count when precise ts is available (diff)
downloadlinux-fb446a1acdb981921de06bfde3a2178da7174481.tar.xz
linux-fb446a1acdb981921de06bfde3a2178da7174481.zip
drm: Simplify return value of drm_get_last_vbltimestamp
Imo u32 hints at a register value, but in reality all callers only care whether the sampled timestamp is precise or not. So give them just a bool. Also move the declaration out of drmP.h, it's only used in drm_irq.c. v2: Also drop the EXPORT_SYMBOL, spotted by Mario. Cc: Mario Kleiner <mario.kleiner.de@gmail.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Mario Kleiner <mario.kleiner.de@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/drm_irq.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index ad699b729278..15f748c7fa7e 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -55,6 +55,10 @@
*/
#define DRM_REDUNDANT_VBLIRQ_THRESH_NS 1000000
+static bool
+drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
+ struct timeval *tvblank, unsigned flags);
+
/**
* drm_update_vblank_count - update the master vblank counter
* @dev: DRM device
@@ -74,7 +78,8 @@
static void drm_update_vblank_count(struct drm_device *dev, int crtc)
{
struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
- u32 cur_vblank, diff, tslot, rc;
+ u32 cur_vblank, diff, tslot;
+ bool rc;
struct timeval t_vblank;
/*
@@ -132,7 +137,7 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
unsigned long irqflags;
u32 vblcount;
s64 diff_ns;
- int vblrc;
+ bool vblrc;
struct timeval tvblank;
int count = DRM_TIMESTAMP_MAXRETRIES;
@@ -156,7 +161,7 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
* vblank interrupt is disabled.
*/
if (!vblank->enabled &&
- drm_get_last_vbltimestamp(dev, crtc, &tvblank, 0) > 0) {
+ drm_get_last_vbltimestamp(dev, crtc, &tvblank, 0)) {
drm_update_vblank_count(dev, crtc);
spin_unlock_irqrestore(&dev->vblank_time_lock, irqflags);
return;
@@ -204,7 +209,7 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
* available. In that case we can't account for this and just
* hope for the best.
*/
- if ((vblrc > 0) && (abs64(diff_ns) > 1000000)) {
+ if (vblrc && (abs64(diff_ns) > 1000000)) {
/* Store new timestamp in ringbuffer. */
vblanktimestamp(dev, crtc, vblcount + 1) = tvblank;
@@ -781,10 +786,11 @@ static struct timeval get_drm_timestamp(void)
* call, i.e., it isn't very precisely locked to the true vblank.
*
* Returns:
- * Non-zero if timestamp is considered to be very precise, zero otherwise.
+ * True if timestamp is considered to be very precise, false otherwise.
*/
-u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
- struct timeval *tvblank, unsigned flags)
+static bool
+drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
+ struct timeval *tvblank, unsigned flags)
{
int ret;
@@ -796,7 +802,7 @@ u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
ret = dev->driver->get_vblank_timestamp(dev, crtc, &max_error,
tvblank, flags);
if (ret > 0)
- return (u32) ret;
+ return true;
}
/* GPU high precision timestamp query unsupported or failed.
@@ -804,9 +810,8 @@ u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
*/
*tvblank = get_drm_timestamp();
- return 0;
+ return false;
}
-EXPORT_SYMBOL(drm_get_last_vbltimestamp);
/**
* drm_vblank_count - retrieve "cooked" vblank counter value