diff options
author | rnoland <rnoland@FreeBSD.org> | 2009-03-19 08:34:04 +0000 |
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committer | rnoland <rnoland@FreeBSD.org> | 2009-03-19 08:34:04 +0000 |
commit | eadbcd8e34940289c31fa60ed3214922294094c4 (patch) | |
tree | 2e58c1e1f541c5e0dc2135d6c124df7974bf467f /sys/dev/drm | |
parent | 45592455beefd2035fbe3a23df53f1632ecb1830 (diff) | |
download | FreeBSD-src-eadbcd8e34940289c31fa60ed3214922294094c4.zip FreeBSD-src-eadbcd8e34940289c31fa60ed3214922294094c4.tar.gz |
Rework vblank handling to try to resolve some reports of "slow" windows
after vt switch or suspend. I can't really test this on Intel right now
but I think I've heard reports of it on radeon as well. I can't break
it on the radeon here.
MFC after: 3 days
Diffstat (limited to 'sys/dev/drm')
-rw-r--r-- | sys/dev/drm/drm_irq.c | 55 |
1 files changed, 36 insertions, 19 deletions
diff --git a/sys/dev/drm/drm_irq.c b/sys/dev/drm/drm_irq.c index 00e1c9d..6ece9eb 100644 --- a/sys/dev/drm/drm_irq.c +++ b/sys/dev/drm/drm_irq.c @@ -98,15 +98,13 @@ static void vblank_disable_fn(void *arg) void drm_vblank_cleanup(struct drm_device *dev) { - unsigned long irqflags; - /* Bail if the driver didn't call drm_vblank_init() */ if (dev->num_crtcs == 0) return; - DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags); + DRM_SPINLOCK(&dev->vbl_lock); callout_stop(&dev->vblank_disable_timer); - DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags); + DRM_SPINUNLOCK(&dev->vbl_lock); callout_drain(&dev->vblank_disable_timer); @@ -200,11 +198,25 @@ err: int drm_irq_uninstall(struct drm_device *dev) { + int crtc; + if (!dev->irq_enabled) return EINVAL; dev->irq_enabled = 0; + /* + * Wake up any waiters so they don't hang. + */ + DRM_SPINLOCK(&dev->vbl_lock); + for (crtc = 0; crtc < dev->num_crtcs; crtc++) { + DRM_WAKEUP(&dev->vblank[crtc].queue); + dev->vblank[crtc].enabled = 0; + dev->vblank[crtc].last = + dev->driver->get_vblank_counter(dev, crtc); + } + DRM_SPINUNLOCK(&dev->vbl_lock); + DRM_DEBUG("irq=%d\n", dev->irq); dev->driver->irq_uninstall(dev); @@ -277,16 +289,15 @@ static void drm_update_vblank_count(struct drm_device *dev, int crtc) int drm_vblank_get(struct drm_device *dev, int crtc) { - unsigned long irqflags; int ret = 0; - DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags); + DRM_SPINLOCK(&dev->vbl_lock); /* Going from 0->1 means we have to enable interrupts again */ atomic_add_acq_int(&dev->vblank[crtc].refcount, 1); - DRM_DEBUG("vblank refcount = %d\n", dev->vblank[crtc].refcount); if (dev->vblank[crtc].refcount == 1 && !dev->vblank[crtc].enabled) { ret = dev->driver->enable_vblank(dev, crtc); + DRM_DEBUG("enabling vblank on crtc %d, ret: %d\n", crtc, ret); if (ret) atomic_dec(&dev->vblank[crtc].refcount); else { @@ -294,30 +305,28 @@ int drm_vblank_get(struct drm_device *dev, int crtc) drm_update_vblank_count(dev, crtc); } } - DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags); + DRM_SPINUNLOCK(&dev->vbl_lock); return ret; } void drm_vblank_put(struct drm_device *dev, int crtc) { - unsigned long irqflags; + KASSERT(atomic_read(&dev->vblank[crtc].refcount) > 0, + ("invalid refcount")); - DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags); /* Last user schedules interrupt disable */ atomic_subtract_acq_int(&dev->vblank[crtc].refcount, 1); - DRM_DEBUG("vblank refcount = %d\n", dev->vblank[crtc].refcount); + if (dev->vblank[crtc].refcount == 0) callout_reset(&dev->vblank_disable_timer, 5 * DRM_HZ, (timeout_t *)vblank_disable_fn, (void *)dev); - DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags); } int drm_modeset_ctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_modeset_ctl *modeset = data; - unsigned long irqflags; int crtc, ret = 0; DRM_DEBUG("num_crtcs=%d\n", dev->num_crtcs); @@ -343,18 +352,22 @@ int drm_modeset_ctl(struct drm_device *dev, void *data, case _DRM_PRE_MODESET: DRM_DEBUG("pre-modeset\n"); if (!dev->vblank[crtc].inmodeset) { - dev->vblank[crtc].inmodeset = 1; - drm_vblank_get(dev, crtc); + dev->vblank[crtc].inmodeset = 0x1; + if (drm_vblank_get(dev, crtc) == 0) + dev->vblank[crtc].inmodeset |= 0x2; } break; case _DRM_POST_MODESET: DRM_DEBUG("post-modeset\n"); if (dev->vblank[crtc].inmodeset) { - DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags); + DRM_SPINLOCK(&dev->vbl_lock); dev->vblank_disable_allowed = 1; + DRM_SPINUNLOCK(&dev->vbl_lock); + + if (dev->vblank[crtc].inmodeset & 0x2) + drm_vblank_put(dev, crtc); + dev->vblank[crtc].inmodeset = 0; - DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags); - drm_vblank_put(dev, crtc); } break; default: @@ -445,7 +458,11 @@ int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_pr mtx_unlock(&dev->irq_lock); } - DRM_DEBUG("return = %d\n", ret); + if (ret == ERESTART) { + DRM_DEBUG("restarting syscall\n"); + return ret; + } + if (ret != EINTR) { struct timeval now; |