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drm: fix radeon irq properly 

After the previous fix in 2.6.12, this patch should properly fix the
radeon IRQ handling code.

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Dave Airlie 2005-06-26 21:05:59 +10:00 committed by Dave Airlie
parent bc54fd1ad3
commit 6921e33104
1 changed files with 13 additions and 14 deletions
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27
drivers/char/drm/radeon_irq.c
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@ -35,6 +35,14 @@
#include "radeon_drm.h"
#include "radeon_drv.h"
static __inline__ u32 radeon_acknowledge_irqs(drm_radeon_private_t *dev_priv, u32 mask)
{
u32 irqs = RADEON_READ(RADEON_GEN_INT_STATUS) & mask;
if (irqs)
RADEON_WRITE(RADEON_GEN_INT_STATUS, irqs);
return irqs;
}
/* Interrupts - Used for device synchronization and flushing in the
* following circumstances:
*
@ -63,8 +71,8 @@ irqreturn_t radeon_driver_irq_handler( DRM_IRQ_ARGS )
/* Only consider the bits we're interested in - others could be used
* outside the DRM
*/
stat = RADEON_READ(RADEON_GEN_INT_STATUS)
& (RADEON_SW_INT_TEST | RADEON_CRTC_VBLANK_STAT);
stat = radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK |
RADEON_CRTC_VBLANK_STAT));
if (!stat)
return IRQ_NONE;
@ -80,19 +88,9 @@ irqreturn_t radeon_driver_irq_handler( DRM_IRQ_ARGS )
drm_vbl_send_signals( dev );
}
/* Acknowledge interrupts we handle */
RADEON_WRITE(RADEON_GEN_INT_STATUS, stat);
return IRQ_HANDLED;
}
static __inline__ void radeon_acknowledge_irqs(drm_radeon_private_t *dev_priv)
{
u32 tmp = RADEON_READ( RADEON_GEN_INT_STATUS )
& (RADEON_SW_INT_TEST_ACK | RADEON_CRTC_VBLANK_STAT);
if (tmp)
RADEON_WRITE( RADEON_GEN_INT_STATUS, tmp );
}
static int radeon_emit_irq(drm_device_t *dev)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
@ -141,7 +139,7 @@ int radeon_driver_vblank_wait(drm_device_t *dev, unsigned int *sequence)
return DRM_ERR(EINVAL);
}
radeon_acknowledge_irqs( dev_priv );
radeon_acknowledge_irqs(dev_priv, RADEON_CRTC_VBLANK_STAT);
dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
@ -219,7 +217,8 @@ void radeon_driver_irq_preinstall( drm_device_t *dev ) {
RADEON_WRITE( RADEON_GEN_INT_CNTL, 0 );
/* Clear bits if they're already high */
radeon_acknowledge_irqs( dev_priv );
radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK |
RADEON_CRTC_VBLANK_STAT));
}
void radeon_driver_irq_postinstall( drm_device_t *dev ) {