From: Laurent Pinchart laurent.pinchart@ideasonboard.com
The omapdrm can't use drm_irq_install() and drm_irq_uninstall() as it delegates IRQ handling to the omapdss driver. However, the code still declares IRQ-related operations used by the DRM IRQ helpers, and calls them indirectly.
Simplify the implementation by calling the functions directly or inlining them. The irq_enabled checks can then also be simplified as the call stacks guarantees that omap_drm_irq_install() and omap_drm_irq_uninstall() will never run concurrently.
Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com --- drivers/gpu/drm/omapdrm/omap_drv.c | 7 +-- drivers/gpu/drm/omapdrm/omap_drv.h | 6 +-- drivers/gpu/drm/omapdrm/omap_irq.c | 102 +++++++++---------------------------- 3 files changed, 25 insertions(+), 90 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index bf02121d9ce8..47fb99b3a375 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -656,8 +656,7 @@ static const struct file_operations omapdriver_fops = { };
static struct drm_driver omap_drm_driver = { - .driver_features = DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM - | DRIVER_PRIME, + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, .load = dev_load, .unload = dev_unload, .open = dev_open, @@ -668,10 +667,6 @@ static struct drm_driver omap_drm_driver = { .get_vblank_counter = drm_vblank_count, .enable_vblank = omap_irq_enable_vblank, .disable_vblank = omap_irq_disable_vblank, - .irq_preinstall = omap_irq_preinstall, - .irq_postinstall = omap_irq_postinstall, - .irq_uninstall = omap_irq_uninstall, - .irq_handler = omap_irq_handler, #ifdef CONFIG_DEBUG_FS .debugfs_init = omap_debugfs_init, .debugfs_cleanup = omap_debugfs_cleanup, diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h index 6c0cb463b9dc..f1005b46a193 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.h +++ b/drivers/gpu/drm/omapdrm/omap_drv.h @@ -122,15 +122,11 @@ int omap_gem_resume(struct device *dev);
int omap_irq_enable_vblank(struct drm_device *dev, int crtc_id); void omap_irq_disable_vblank(struct drm_device *dev, int crtc_id); -irqreturn_t omap_irq_handler(int irq, void *arg); -void omap_irq_preinstall(struct drm_device *dev); -int omap_irq_postinstall(struct drm_device *dev); -void omap_irq_uninstall(struct drm_device *dev); void __omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq); void __omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq); void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq); void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq); -int omap_drm_irq_uninstall(struct drm_device *dev); +void omap_drm_irq_uninstall(struct drm_device *dev); int omap_drm_irq_install(struct drm_device *dev);
struct drm_fb_helper *omap_fbdev_init(struct drm_device *dev); diff --git a/drivers/gpu/drm/omapdrm/omap_irq.c b/drivers/gpu/drm/omapdrm/omap_irq.c index 3eb097efc488..803aff0db768 100644 --- a/drivers/gpu/drm/omapdrm/omap_irq.c +++ b/drivers/gpu/drm/omapdrm/omap_irq.c @@ -187,7 +187,7 @@ void omap_irq_disable_vblank(struct drm_device *dev, int crtc_id) dispc_runtime_put(); }
-irqreturn_t omap_irq_handler(int irq, void *arg) +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; @@ -222,23 +222,29 @@ irqreturn_t omap_irq_handler(int irq, void *arg) 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(); -} +/* + * 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_irq_postinstall(struct drm_device *dev) +int omap_drm_irq_install(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); + int ret;
INIT_LIST_HEAD(&priv->irq_list);
+ dispc_runtime_get(); + dispc_clear_irqstatus(0xffffffff); + dispc_runtime_put(); + + ret = dispc_request_irq(omap_irq_handler, dev); + if (ret < 0) + return ret; + error_handler->irq = omap_irq_error_handler; error_handler->irqmask = DISPC_IRQ_OCP_ERR;
@@ -249,76 +255,22 @@ int omap_irq_postinstall(struct drm_device *dev)
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 = true; - 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 = false; - 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 = false; - mutex_unlock(&dev->struct_mutex); - dispc_free_irq(dev); - } - - return ret; + return 0; }
-int omap_drm_irq_uninstall(struct drm_device *dev) +void omap_drm_irq_uninstall(struct drm_device *dev) { unsigned long irqflags; - bool irq_enabled; int i;
- mutex_lock(&dev->struct_mutex); - irq_enabled = dev->irq_enabled; + if (!dev->irq_enabled) + return; + dev->irq_enabled = false; - mutex_unlock(&dev->struct_mutex);
- /* - * Wake up any waiters so they don't hang. - */ + /* 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++) { @@ -330,13 +282,5 @@ int omap_drm_irq_uninstall(struct drm_device *dev) 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; }