summaryrefslogtreecommitdiff
path: root/drivers/staging/omapdrm/omap_irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/staging/omapdrm/omap_irq.c')
-rw-r--r--drivers/staging/omapdrm/omap_irq.c322
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;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-15 17:01:10 +0000