summaryrefslogtreecommitdiff
path: root/linux-core/drm_irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'linux-core/drm_irq.c')
-rw-r--r--linux-core/drm_irq.c122
1 files changed, 103 insertions, 19 deletions
diff --git a/linux-core/drm_irq.c b/linux-core/drm_irq.c
index 57419ca1..103f3e2b 100644
--- a/linux-core/drm_irq.c
+++ b/linux-core/drm_irq.c
@@ -96,30 +96,37 @@ static void vblank_disable_fn(unsigned long arg)
static void drm_vblank_cleanup(struct drm_device *dev)
{
- /* Bail if the driver didn't call drm_vblank_init() */
- if (dev->num_crtcs == 0)
- return;
-
del_timer(&dev->vblank_disable_timer);
vblank_disable_fn((unsigned long)dev);
- drm_free(dev->vbl_queue, sizeof(*dev->vbl_queue) * dev->num_crtcs,
+ if (dev->vbl_queue)
+ drm_free(dev->vbl_queue, sizeof(*dev->vbl_queue) * dev->num_crtcs,
DRM_MEM_DRIVER);
- drm_free(dev->vbl_sigs, sizeof(*dev->vbl_sigs) * dev->num_crtcs,
+
+ if (dev->vbl_sigs)
+ drm_free(dev->vbl_sigs, sizeof(*dev->vbl_sigs) * dev->num_crtcs,
DRM_MEM_DRIVER);
- drm_free(dev->_vblank_count, sizeof(*dev->_vblank_count) *
+
+ if (dev->_vblank_count)
+ drm_free(dev->_vblank_count, sizeof(*dev->_vblank_count) *
dev->num_crtcs, DRM_MEM_DRIVER);
- drm_free(dev->vblank_refcount, sizeof(*dev->vblank_refcount) *
+
+ if (dev->vblank_refcount)
+ drm_free(dev->vblank_refcount, sizeof(*dev->vblank_refcount) *
dev->num_crtcs, DRM_MEM_DRIVER);
- drm_free(dev->vblank_enabled, sizeof(*dev->vblank_enabled) *
+
+ if (dev->vblank_enabled)
+ drm_free(dev->vblank_enabled, sizeof(*dev->vblank_enabled) *
dev->num_crtcs, DRM_MEM_DRIVER);
- drm_free(dev->last_vblank, sizeof(*dev->last_vblank) * dev->num_crtcs,
+
+ if (dev->last_vblank)
+ drm_free(dev->last_vblank, sizeof(*dev->last_vblank) * dev->num_crtcs,
DRM_MEM_DRIVER);
- drm_free(dev->vblank_inmodeset, sizeof(*dev->vblank_inmodeset) *
- dev->num_crtcs, DRM_MEM_DRIVER);
- dev->num_crtcs = 0;
+ if (dev->vblank_inmodeset)
+ drm_free(dev->vblank_inmodeset, sizeof(*dev->vblank_inmodeset) *
+ dev->num_crtcs, DRM_MEM_DRIVER);
}
int drm_vblank_init(struct drm_device *dev, int num_crtcs)
@@ -185,6 +192,30 @@ err:
}
EXPORT_SYMBOL(drm_vblank_init);
+static void drm_hotplug_cleanup(struct drm_device *dev)
+{
+ if (dev->hotplug_sigs)
+ drm_free(dev->hotplug_sigs, sizeof(*dev->hotplug_sigs),
+ DRM_MEM_DRIVER);
+}
+EXPORT_SYMBOL(drm_hotplug_cleanup);
+
+int drm_hotplug_init(struct drm_device *dev)
+{
+ spin_lock_init(&dev->hotplug_lock);
+ atomic_set(&dev->hotplug_signal_pending, 0);
+
+ dev->hotplug_sigs = drm_alloc(sizeof(struct list_head), DRM_MEM_DRIVER);
+ if (!dev->hotplug_sigs)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(dev->hotplug_sigs);
+ init_waitqueue_head(&dev->hotplug_queue);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_hotplug_init);
+
/**
* Install IRQ handler.
*
@@ -215,7 +246,7 @@ int drm_irq_install(struct drm_device * dev)
if (dev->irq_enabled) {
mutex_unlock(&dev->struct_mutex);
- return -EBUSY;
+ return 0;
}
dev->irq_enabled = 1;
mutex_unlock(&dev->struct_mutex);
@@ -284,6 +315,8 @@ int drm_irq_uninstall(struct drm_device * dev)
drm_vblank_cleanup(dev);
+ drm_hotplug_cleanup(dev);
+
dev->locked_tasklet_func = NULL;
return 0;
@@ -313,6 +346,8 @@ int drm_control(struct drm_device *dev, void *data,
case DRM_INST_HANDLER:
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return 0;
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ return 0;
if (dev->if_version < DRM_IF_VERSION(1, 2) &&
ctl->irq != dev->pdev->irq)
return -EINVAL;
@@ -320,6 +355,8 @@ int drm_control(struct drm_device *dev, void *data,
case DRM_UNINST_HANDLER:
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return 0;
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ return 0;
return drm_irq_uninstall(dev);
default:
return -EINVAL;
@@ -560,7 +597,7 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
if (flags & _DRM_VBLANK_SIGNAL) {
unsigned long irqflags;
struct list_head *vbl_sigs = &dev->vbl_sigs[crtc];
- struct drm_vbl_sig *vbl_sig;
+ struct drm_vbl_sig *vbl_sig, *tmp;
spin_lock_irqsave(&dev->vbl_lock, irqflags);
@@ -568,7 +605,7 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
* for the same vblank sequence number; nothing to be done in
* that case
*/
- list_for_each_entry(vbl_sig, vbl_sigs, head) {
+ list_for_each_entry_safe(vbl_sig, tmp, vbl_sigs, head) {
if (vbl_sig->sequence == vblwait->request.sequence
&& vbl_sig->info.si_signo ==
vblwait->request.signal
@@ -693,6 +730,53 @@ void drm_handle_vblank(struct drm_device *dev, int crtc)
EXPORT_SYMBOL(drm_handle_vblank);
/**
+ * Send the HOTPLUG signals.
+ *
+ * \param dev DRM device.
+ *
+ * Sends a signal for each task in drm_device::hotplug_sigs and empties the list.
+ */
+static void drm_hotplug_send_signals(struct drm_device * dev)
+{
+ struct drm_hotplug_sig *hotplug_sig, *tmp;
+ struct list_head *hotplug_sigs;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->hotplug_lock, flags);
+
+ hotplug_sigs = dev->hotplug_sigs;
+
+ list_for_each_entry_safe(hotplug_sig, tmp, hotplug_sigs, head) {
+ hotplug_sig->info.si_code = hotplug_sig->counter;
+
+ send_sig_info(hotplug_sig->info.si_signo,
+ &hotplug_sig->info, hotplug_sig->task);
+
+ list_del(&hotplug_sig->head);
+
+ drm_free(hotplug_sig, sizeof(*hotplug_sig),
+ DRM_MEM_DRIVER);
+ atomic_dec(&dev->hotplug_signal_pending);
+ }
+
+ spin_unlock_irqrestore(&dev->hotplug_lock, flags);
+}
+
+/**
+ * drm_handle_hotplug - handle a hotplug event
+ * @dev: DRM device
+ * @crtc: where this event occurred
+ *
+ * Drivers should call this routine in their hotplug interrupt handlers.
+ */
+void drm_handle_hotplug(struct drm_device *dev)
+{
+ DRM_WAKEUP(&dev->hotplug_queue);
+ drm_hotplug_send_signals(dev);
+}
+EXPORT_SYMBOL(drm_handle_hotplug);
+
+/**
* Tasklet wrapper function.
*
* \param data DRM device in disguise.
@@ -712,12 +796,12 @@ static void drm_locked_tasklet_func(unsigned long data)
spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
if (!tasklet_func ||
- !drm_lock_take(&dev->lock,
+ !drm_lock_take(&dev->primary->master->lock,
DRM_KERNEL_CONTEXT)) {
return;
}
- dev->lock.lock_time = jiffies;
+ dev->primary->master->lock.lock_time = jiffies;
atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
spin_lock_irqsave(&dev->tasklet_lock, irqflags);
@@ -728,7 +812,7 @@ static void drm_locked_tasklet_func(unsigned long data)
if (tasklet_func != NULL)
tasklet_func(dev);
- drm_lock_free(&dev->lock,
+ drm_lock_free(&dev->primary->master->lock,
DRM_KERNEL_CONTEXT);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-08 15:30:30 +0000