diff options
Diffstat (limited to 'drivers/char/drm/mga_irq.c')
| -rw-r--r-- | drivers/char/drm/mga_irq.c | 42 |
1 files changed, 20 insertions, 22 deletions
diff --git a/drivers/char/drm/mga_irq.c b/drivers/char/drm/mga_irq.c index 52eaa4e788f9..eb9644024172 100644 --- a/drivers/char/drm/mga_irq.c +++ b/drivers/char/drm/mga_irq.c @@ -1,7 +1,7 @@ /* mga_irq.c -- IRQ handling for radeon -*- linux-c -*- * * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. - * + * * The Weather Channel (TM) funded Tungsten Graphics to develop the * initial release of the Radeon 8500 driver under the XFree86 license. * This notice must be preserved. @@ -35,19 +35,18 @@ #include "mga_drm.h" #include "mga_drv.h" -irqreturn_t mga_driver_irq_handler( DRM_IRQ_ARGS ) +irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS) { drm_device_t *dev = (drm_device_t *) arg; - drm_mga_private_t *dev_priv = - (drm_mga_private_t *)dev->dev_private; + drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; int status; int handled = 0; status = MGA_READ(MGA_STATUS); /* VBLANK interrupt */ - if ( status & MGA_VLINEPEN ) { - MGA_WRITE( MGA_ICLEAR, MGA_VLINEICLR ); + if (status & MGA_VLINEPEN) { + MGA_WRITE(MGA_ICLEAR, MGA_VLINEICLR); atomic_inc(&dev->vbl_received); DRM_WAKEUP(&dev->vbl_queue); drm_vbl_send_signals(dev); @@ -57,15 +56,14 @@ irqreturn_t mga_driver_irq_handler( DRM_IRQ_ARGS ) /* SOFTRAP interrupt */ if (status & MGA_SOFTRAPEN) { const u32 prim_start = MGA_READ(MGA_PRIMADDRESS); - const u32 prim_end = MGA_READ(MGA_PRIMEND); - + const u32 prim_end = MGA_READ(MGA_PRIMEND); MGA_WRITE(MGA_ICLEAR, MGA_SOFTRAPICLR); /* In addition to clearing the interrupt-pending bit, we * have to write to MGA_PRIMEND to re-start the DMA operation. */ - if ( (prim_start & ~0x03) != (prim_end & ~0x03) ) { + if ((prim_start & ~0x03) != (prim_end & ~0x03)) { MGA_WRITE(MGA_PRIMEND, prim_end); } @@ -74,24 +72,24 @@ irqreturn_t mga_driver_irq_handler( DRM_IRQ_ARGS ) handled = 1; } - if ( handled ) { + if (handled) { return IRQ_HANDLED; } return IRQ_NONE; } -int mga_driver_vblank_wait(drm_device_t *dev, unsigned int *sequence) +int mga_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence) { unsigned int cur_vblank; int ret = 0; /* Assume that the user has missed the current sequence number * by about a day rather than she wants to wait for years - * using vertical blanks... + * using vertical blanks... */ - DRM_WAIT_ON( ret, dev->vbl_queue, 3*DRM_HZ, - ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) ) - - *sequence ) <= (1<<23) ) ); + DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, + (((cur_vblank = atomic_read(&dev->vbl_received)) + - *sequence) <= (1 << 23))); *sequence = cur_vblank; @@ -122,29 +120,29 @@ void mga_driver_irq_preinstall(drm_device_t * dev) drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; /* Disable *all* interrupts */ - MGA_WRITE( MGA_IEN, 0 ); + MGA_WRITE(MGA_IEN, 0); /* Clear bits if they're already high */ - MGA_WRITE( MGA_ICLEAR, ~0 ); + MGA_WRITE(MGA_ICLEAR, ~0); } void mga_driver_irq_postinstall(drm_device_t * dev) { drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; - DRM_INIT_WAITQUEUE( &dev_priv->fence_queue ); + DRM_INIT_WAITQUEUE(&dev_priv->fence_queue); /* Turn on vertical blank interrupt and soft trap interrupt. */ MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN); } -void mga_driver_irq_uninstall( drm_device_t *dev ) { - drm_mga_private_t *dev_priv = - (drm_mga_private_t *)dev->dev_private; +void mga_driver_irq_uninstall(drm_device_t * dev) +{ + drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private; if (!dev_priv) return; /* Disable *all* interrupts */ MGA_WRITE(MGA_IEN, 0); - + dev->irq_enabled = 0; } |