diff options
Diffstat (limited to 'linux-core/drmP.h')
| -rw-r--r-- | linux-core/drmP.h | 55 |
1 files changed, 49 insertions, 6 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h index c8b72257..b6cc7cb1 100644 --- a/linux-core/drmP.h +++ b/linux-core/drmP.h @@ -627,8 +627,49 @@ struct drm_driver { int (*kernel_context_switch) (struct drm_device * dev, int old, int new); void (*kernel_context_switch_unlock) (struct drm_device * dev); + /** + * get_vblank_counter - get raw hardware vblank counter + * @dev: DRM device + * @crtc: counter to fetch + * + * Driver callback for fetching a raw hardware vblank counter + * for @crtc. If a device doesn't have a hardware counter, the + * driver can simply return the value of drm_vblank_count and + * make the enable_vblank() and disable_vblank() hooks into no-ops, + * leaving interrupts enabled at all times. + * + * Wraparound handling and loss of events due to modesetting is dealt + * with in the DRM core code. + * + * RETURNS + * Raw vblank counter value. + */ u32 (*get_vblank_counter) (struct drm_device *dev, int crtc); - void (*enable_vblank) (struct drm_device *dev, int crtc); + + /** + * enable_vblank - enable vblank interrupt events + * @dev: DRM device + * @crtc: which irq to enable + * + * Enable vblank interrupts for @crtc. If the device doesn't have + * a hardware vblank counter, this routine should be a no-op, since + * interrupts will have to stay on to keep the count accurate. + * + * RETURNS + * Zero on success, appropriate errno if the given @crtc's vblank + * interrupt cannot be enabled. + */ + int (*enable_vblank) (struct drm_device *dev, int crtc); + + /** + * disable_vblank - disable vblank interrupt events + * @dev: DRM device + * @crtc: which irq to enable + * + * Disable vblank interrupts for @crtc. If the device doesn't have + * a hardware vblank counter, this routine should be a no-op, since + * interrupts will have to stay on to keep the count accurate. + */ void (*disable_vblank) (struct drm_device *dev, int crtc); int (*dri_library_name) (struct drm_device * dev, char * buf); @@ -784,11 +825,11 @@ typedef struct drm_device { /*@{ */ wait_queue_head_t vbl_queue; /**< VBLANK wait queue */ - atomic_t *vblank_count; /**< number of VBLANK interrupts (driver must alloc the right number of counters) */ + atomic_t *_vblank_count; /**< number of VBLANK interrupts (driver must alloc the right number of counters) */ spinlock_t vbl_lock; struct list_head *vbl_sigs; /**< signal list to send on VBLANK */ - atomic_t vbl_pending; /* number of signals pending on all crtcs*/ - atomic_t *vblank_usage; /* number of users of vblank interrupts per crtc */ + atomic_t vbl_signal_pending; /* number of signals pending on all crtcs*/ + atomic_t *vblank_refcount; /* number of users of vblank interrupts per crtc */ u32 *last_vblank; /* protected by dev->vbl_lock, used */ /* for wraparound handling */ u32 *vblank_offset; /* used to track how many vblanks */ @@ -1083,9 +1124,11 @@ extern int drm_vblank_init(drm_device_t *dev, int num_crtcs); extern int drm_wait_vblank(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_vblank_wait(drm_device_t * dev, unsigned int *vbl_seq); -extern void drm_vbl_send_signals(drm_device_t * dev); extern void drm_locked_tasklet(drm_device_t *dev, void(*func)(drm_device_t*)); -extern void drm_vblank_get(drm_device_t *dev, int crtc); +extern u32 drm_vblank_count(drm_device_t *dev, int crtc); +extern void drm_update_vblank_count(drm_device_t *dev, int crtc); +extern void drm_handle_vblank(drm_device_t *dev, int crtc); +extern int drm_vblank_get(drm_device_t *dev, int crtc); extern void drm_vblank_put(drm_device_t *dev, int crtc); /* Modesetting support */ |