diff options
Diffstat (limited to 'drivers/staging/omapdrm/omap_irq.c')
-rw-r--r-- | drivers/staging/omapdrm/omap_irq.c | 322 |
1 files changed, 0 insertions, 322 deletions
diff --git a/drivers/staging/omapdrm/omap_irq.c b/drivers/staging/omapdrm/omap_irq.c deleted file mode 100644 index 2629ba7be6c8..000000000000 --- a/drivers/staging/omapdrm/omap_irq.c +++ /dev/null @@ -1,322 +0,0 @@ -/* - * drivers/staging/omapdrm/omap_irq.c - * - * Copyright (C) 2012 Texas Instruments - * Author: Rob Clark <rob.clark@linaro.org> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include "omap_drv.h" - -static DEFINE_SPINLOCK(list_lock); - -static void omap_irq_error_handler(struct omap_drm_irq *irq, - uint32_t irqstatus) -{ - DRM_ERROR("errors: %08x\n", irqstatus); -} - -/* 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; - uint32_t irqmask = priv->vblank_mask; - - BUG_ON(!spin_is_locked(&list_lock)); - - list_for_each_entry(irq, &priv->irq_list, node) - irqmask |= irq->irqmask; - - DBG("irqmask=%08x", irqmask); - - dispc_write_irqenable(irqmask); - dispc_read_irqenable(); /* flush posted write */ -} - -void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq) -{ - struct omap_drm_private *priv = dev->dev_private; - unsigned long flags; - - dispc_runtime_get(); - 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); - dispc_runtime_put(); -} - -void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq) -{ - unsigned long flags; - - dispc_runtime_get(); - 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); - dispc_runtime_put(); -} - -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, uint32_t irqstatus) -{ - struct omap_irq_wait *wait = - container_of(irq, struct omap_irq_wait, irq); - wait->count--; - wake_up_all(&wait_event); -} - -struct omap_irq_wait * omap_irq_wait_init(struct drm_device *dev, - uint32_t irqmask, int count) -{ - struct omap_irq_wait *wait = kzalloc(sizeof(*wait), GFP_KERNEL); - wait->irq.irq = wait_irq; - wait->irq.irqmask = irqmask; - wait->count = count; - omap_irq_register(dev, &wait->irq); - return wait; -} - -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); - kfree(wait); - if (ret == 0) - return -1; - return 0; -} - -/** - * 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 omap_irq_enable_vblank(struct drm_device *dev, int crtc) -{ - struct omap_drm_private *priv = dev->dev_private; - unsigned long flags; - - DBG("dev=%p, crtc=%d", dev, crtc); - - dispc_runtime_get(); - spin_lock_irqsave(&list_lock, flags); - priv->vblank_mask |= pipe2vbl(crtc); - omap_irq_update(dev); - spin_unlock_irqrestore(&list_lock, flags); - dispc_runtime_put(); - - return 0; -} - -/** - * 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 omap_irq_disable_vblank(struct drm_device *dev, int crtc) -{ - struct omap_drm_private *priv = dev->dev_private; - unsigned long flags; - - DBG("dev=%p, crtc=%d", dev, crtc); - - dispc_runtime_get(); - spin_lock_irqsave(&list_lock, flags); - priv->vblank_mask &= ~pipe2vbl(crtc); - omap_irq_update(dev); - spin_unlock_irqrestore(&list_lock, flags); - dispc_runtime_put(); -} - -irqreturn_t omap_irq_handler(DRM_IRQ_ARGS) -{ - struct drm_device *dev = (struct drm_device *) arg; - struct omap_drm_private *priv = dev->dev_private; - struct omap_drm_irq *handler, *n; - unsigned long flags; - unsigned int id; - u32 irqstatus; - - irqstatus = dispc_read_irqstatus(); - dispc_clear_irqstatus(irqstatus); - dispc_read_irqstatus(); /* flush posted write */ - - VERB("irqs: %08x", irqstatus); - - for (id = 0; id < priv->num_crtcs; id++) - if (irqstatus & pipe2vbl(id)) - drm_handle_vblank(dev, id); - - 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, handler->irqmask & irqstatus); - spin_lock_irqsave(&list_lock, flags); - } - } - spin_unlock_irqrestore(&list_lock, flags); - - return IRQ_HANDLED; -} - -void omap_irq_preinstall(struct drm_device *dev) -{ - DBG("dev=%p", dev); - dispc_runtime_get(); - dispc_clear_irqstatus(0xffffffff); - dispc_runtime_put(); -} - -int omap_irq_postinstall(struct drm_device *dev) -{ - struct omap_drm_private *priv = dev->dev_private; - struct omap_drm_irq *error_handler = &priv->error_handler; - - DBG("dev=%p", dev); - - INIT_LIST_HEAD(&priv->irq_list); - - error_handler->irq = omap_irq_error_handler; - error_handler->irqmask = DISPC_IRQ_OCP_ERR; - - /* for now ignore DISPC_IRQ_SYNC_LOST_DIGIT.. really I think - * we just need to ignore it while enabling tv-out - */ - error_handler->irqmask &= ~DISPC_IRQ_SYNC_LOST_DIGIT; - - omap_irq_register(dev, error_handler); - - return 0; -} - -void omap_irq_uninstall(struct drm_device *dev) -{ - DBG("dev=%p", dev); - // TODO prolly need to call drm_irq_uninstall() somewhere too -} - -/* - * We need a special version, instead of just using drm_irq_install(), - * because we need to register the irq via omapdss. Once omapdss and - * omapdrm are merged together we can assign the dispc hwmod data to - * ourselves and drop these and just use drm_irq_{install,uninstall}() - */ - -int omap_drm_irq_install(struct drm_device *dev) -{ - int ret; - - mutex_lock(&dev->struct_mutex); - - if (dev->irq_enabled) { - mutex_unlock(&dev->struct_mutex); - return -EBUSY; - } - dev->irq_enabled = 1; - mutex_unlock(&dev->struct_mutex); - - /* Before installing handler */ - if (dev->driver->irq_preinstall) - dev->driver->irq_preinstall(dev); - - ret = dispc_request_irq(dev->driver->irq_handler, dev); - - if (ret < 0) { - mutex_lock(&dev->struct_mutex); - dev->irq_enabled = 0; - mutex_unlock(&dev->struct_mutex); - return ret; - } - - /* After installing handler */ - if (dev->driver->irq_postinstall) - ret = dev->driver->irq_postinstall(dev); - - if (ret < 0) { - mutex_lock(&dev->struct_mutex); - dev->irq_enabled = 0; - mutex_unlock(&dev->struct_mutex); - dispc_free_irq(dev); - } - - return ret; -} - -int omap_drm_irq_uninstall(struct drm_device *dev) -{ - unsigned long irqflags; - int irq_enabled, i; - - mutex_lock(&dev->struct_mutex); - irq_enabled = dev->irq_enabled; - dev->irq_enabled = 0; - mutex_unlock(&dev->struct_mutex); - - /* - * Wake up any waiters so they don't hang. - */ - if (dev->num_crtcs) { - spin_lock_irqsave(&dev->vbl_lock, irqflags); - for (i = 0; i < dev->num_crtcs; i++) { - DRM_WAKEUP(&dev->vbl_queue[i]); - dev->vblank_enabled[i] = 0; - dev->last_vblank[i] = - dev->driver->get_vblank_counter(dev, i); - } - spin_unlock_irqrestore(&dev->vbl_lock, irqflags); - } - - if (!irq_enabled) - return -EINVAL; - - if (dev->driver->irq_uninstall) - dev->driver->irq_uninstall(dev); - - dispc_free_irq(dev); - - return 0; -} |