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Commit 6921e331 authored by Dave Airlie's avatar Dave Airlie Committed by Dave Airlie
Browse files

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: default avatarDave Airlie <airlied@linux.ie>
parent bc54fd1a

drivers/char/drm/radeon_irq.c

+13 −14
Original line number Diff line number Diff line
@@ -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 ) {