mirror of https://gitee.com/openkylin/linux.git
drm: omapdrm: Simplify IRQ wait implementation
Now that the IRQ list is used for IRQ wait only we can merge omap_drm_irq and omap_irq_wait and simplify the implementation. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
parent
ca52d2f33b
commit
80f91bffb7
|
@ -48,19 +48,6 @@ struct omap_drm_window {
|
|||
uint32_t src_w, src_h;
|
||||
};
|
||||
|
||||
/* For transiently registering for different DSS irqs that various parts
|
||||
* of the KMS code need during setup/configuration. We these are not
|
||||
* necessarily the same as what drm_vblank_get/put() are requesting, and
|
||||
* the hysteresis in drm_vblank_put() is not necessarily desirable for
|
||||
* internal housekeeping related irq usage.
|
||||
*/
|
||||
struct omap_drm_irq {
|
||||
struct list_head node;
|
||||
uint32_t irqmask;
|
||||
bool registered;
|
||||
void (*irq)(struct omap_drm_irq *irq);
|
||||
};
|
||||
|
||||
/* For KMS code that needs to wait for a certain # of IRQs:
|
||||
*/
|
||||
struct omap_irq_wait;
|
||||
|
@ -101,8 +88,8 @@ struct omap_drm_private {
|
|||
struct drm_property *zorder_prop;
|
||||
|
||||
/* irq handling: */
|
||||
struct list_head irq_list; /* list of omap_drm_irq */
|
||||
uint32_t irq_mask; /* enabled irqs in addition to irq_list */
|
||||
struct list_head wait_list; /* list of omap_irq_wait */
|
||||
uint32_t irq_mask; /* enabled irqs in addition to wait_list */
|
||||
|
||||
/* atomic commit */
|
||||
struct {
|
||||
|
|
|
@ -21,17 +21,23 @@
|
|||
|
||||
static DEFINE_SPINLOCK(list_lock);
|
||||
|
||||
struct omap_irq_wait {
|
||||
struct list_head node;
|
||||
uint32_t irqmask;
|
||||
int count;
|
||||
};
|
||||
|
||||
/* call with list_lock and dispc runtime held */
|
||||
static void omap_irq_update(struct drm_device *dev)
|
||||
{
|
||||
struct omap_drm_private *priv = dev->dev_private;
|
||||
struct omap_drm_irq *irq;
|
||||
struct omap_irq_wait *wait;
|
||||
uint32_t irqmask = priv->irq_mask;
|
||||
|
||||
assert_spin_locked(&list_lock);
|
||||
|
||||
list_for_each_entry(irq, &priv->irq_list, node)
|
||||
irqmask |= irq->irqmask;
|
||||
list_for_each_entry(wait, &priv->wait_list, node)
|
||||
irqmask |= wait->irqmask;
|
||||
|
||||
DBG("irqmask=%08x", irqmask);
|
||||
|
||||
|
@ -39,61 +45,29 @@ static void omap_irq_update(struct drm_device *dev)
|
|||
dispc_read_irqenable(); /* flush posted write */
|
||||
}
|
||||
|
||||
static void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq)
|
||||
{
|
||||
struct omap_drm_private *priv = dev->dev_private;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&list_lock, flags);
|
||||
|
||||
if (!WARN_ON(irq->registered)) {
|
||||
irq->registered = true;
|
||||
list_add(&irq->node, &priv->irq_list);
|
||||
omap_irq_update(dev);
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&list_lock, flags);
|
||||
}
|
||||
|
||||
static void omap_irq_unregister(struct drm_device *dev,
|
||||
struct omap_drm_irq *irq)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&list_lock, flags);
|
||||
|
||||
if (!WARN_ON(!irq->registered)) {
|
||||
irq->registered = false;
|
||||
list_del(&irq->node);
|
||||
omap_irq_update(dev);
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&list_lock, flags);
|
||||
}
|
||||
|
||||
struct omap_irq_wait {
|
||||
struct omap_drm_irq irq;
|
||||
int count;
|
||||
};
|
||||
|
||||
static DECLARE_WAIT_QUEUE_HEAD(wait_event);
|
||||
|
||||
static void wait_irq(struct omap_drm_irq *irq)
|
||||
static void omap_irq_wait_handler(struct omap_irq_wait *wait)
|
||||
{
|
||||
struct omap_irq_wait *wait =
|
||||
container_of(irq, struct omap_irq_wait, irq);
|
||||
wait->count--;
|
||||
wake_up_all(&wait_event);
|
||||
wake_up(&wait_event);
|
||||
}
|
||||
|
||||
struct omap_irq_wait * omap_irq_wait_init(struct drm_device *dev,
|
||||
uint32_t irqmask, int count)
|
||||
{
|
||||
struct omap_drm_private *priv = dev->dev_private;
|
||||
struct omap_irq_wait *wait = kzalloc(sizeof(*wait), GFP_KERNEL);
|
||||
wait->irq.irq = wait_irq;
|
||||
wait->irq.irqmask = irqmask;
|
||||
unsigned long flags;
|
||||
|
||||
wait->irqmask = irqmask;
|
||||
wait->count = count;
|
||||
omap_irq_register(dev, &wait->irq);
|
||||
|
||||
spin_lock_irqsave(&list_lock, flags);
|
||||
list_add(&wait->node, &priv->wait_list);
|
||||
omap_irq_update(dev);
|
||||
spin_unlock_irqrestore(&list_lock, flags);
|
||||
|
||||
return wait;
|
||||
}
|
||||
|
||||
|
@ -101,11 +75,16 @@ int omap_irq_wait(struct drm_device *dev, struct omap_irq_wait *wait,
|
|||
unsigned long timeout)
|
||||
{
|
||||
int ret = wait_event_timeout(wait_event, (wait->count <= 0), timeout);
|
||||
omap_irq_unregister(dev, &wait->irq);
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&list_lock, flags);
|
||||
list_del(&wait->node);
|
||||
omap_irq_update(dev);
|
||||
spin_unlock_irqrestore(&list_lock, flags);
|
||||
|
||||
kfree(wait);
|
||||
if (ret == 0)
|
||||
return -1;
|
||||
return 0;
|
||||
|
||||
return ret == 0 ? -1 : 0;
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -213,7 +192,7 @@ static irqreturn_t omap_irq_handler(int irq, void *arg)
|
|||
{
|
||||
struct drm_device *dev = (struct drm_device *) arg;
|
||||
struct omap_drm_private *priv = dev->dev_private;
|
||||
struct omap_drm_irq *handler, *n;
|
||||
struct omap_irq_wait *wait, *n;
|
||||
unsigned long flags;
|
||||
unsigned int id;
|
||||
u32 irqstatus;
|
||||
|
@ -241,12 +220,9 @@ static irqreturn_t omap_irq_handler(int irq, void *arg)
|
|||
omap_irq_fifo_underflow(priv, irqstatus);
|
||||
|
||||
spin_lock_irqsave(&list_lock, flags);
|
||||
list_for_each_entry_safe(handler, n, &priv->irq_list, node) {
|
||||
if (handler->irqmask & irqstatus) {
|
||||
spin_unlock_irqrestore(&list_lock, flags);
|
||||
handler->irq(handler);
|
||||
spin_lock_irqsave(&list_lock, flags);
|
||||
}
|
||||
list_for_each_entry_safe(wait, n, &priv->wait_list, node) {
|
||||
if (wait->irqmask & irqstatus)
|
||||
omap_irq_wait_handler(wait);
|
||||
}
|
||||
spin_unlock_irqrestore(&list_lock, flags);
|
||||
|
||||
|
@ -275,7 +251,7 @@ int omap_drm_irq_install(struct drm_device *dev)
|
|||
unsigned int i;
|
||||
int ret;
|
||||
|
||||
INIT_LIST_HEAD(&priv->irq_list);
|
||||
INIT_LIST_HEAD(&priv->wait_list);
|
||||
|
||||
priv->irq_mask = DISPC_IRQ_OCP_ERR;
|
||||
|
||||
|
|
Loading…
Reference in New Issue