Commit cda17380 authored by Dave Airlie's avatar Dave Airlie Committed by Dave Airlie
Browse files

drm: add test for AGP devices and driver override for it. 



Added device_is_agp callback to drm_driver.  This function is called by the
platform-specific drm_device_is_agp function.  Added implementation of this
function the the Linux-specific portion of the MGA driver to detect PCI G450
cards.  Added code to the Linux-specific portion of the generic DRM layer to
not initialize AGP infrastructure if the card is not AGP (this matches what
already existed in BSD).

Fix up i810/i830 and i915 drivers to always return AGP as they don't always
report the capability.

Fix the MGA to not report AGP for a card that has an AGP chip behind a PCI
bridge.

From: Ian Romanick, Dave Airlie, Alan Hourihane
Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
parent ceb9c27a

drivers/char/drm/drmP.h

+28 −0
Original line number Diff line number Diff line
@@ -586,7 +586,22 @@ struct drm_driver { 
 	int (*kernel_context_switch)(struct drm_device *dev, int old, int new);

	void (*kernel_context_switch_unlock)(struct drm_device *dev, drm_lock_t *lock);

	int (*vblank_wait)(struct drm_device *dev, unsigned int *sequence);

	

	/**

	 * Called by \c drm_device_is_agp.  Typically used to determine if a

	 * card is really attached to AGP or not.

	 *

	 * \param dev  DRM device handle

	 *

	 * \returns

	 * One of three values is returned depending on whether or not the

	 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP

	 * (return of 1), or may or may not be AGP (return of 2).

	 */

	int (*device_is_agp) (struct drm_device * dev);



	/* these have to be filled in */

  

 	int (*postinit)(struct drm_device *, unsigned long flags);

	irqreturn_t (*irq_handler)( DRM_IRQ_ARGS );

 	void (*irq_preinstall)(struct drm_device *dev);
@@ -1041,6 +1056,19 @@ static __inline__ struct drm_map *drm_core_findmap(struct drm_device *dev, unsig 
	return NULL;

}



static __inline__ int drm_device_is_agp(drm_device_t *dev)

{

	if ( dev->driver->device_is_agp != NULL ) {

		int err = (*dev->driver->device_is_agp)( dev );

	

		if (err != 2) {

			return err;

		}

	}



	return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);

}



static __inline__ void drm_core_dropmap(struct drm_map *map)

{

}

drivers/char/drm/drm_stub.c

+2 −1
Original line number Diff line number Diff line
@@ -91,6 +91,7 @@ static int drm_fill_in_dev(drm_device_t *dev, struct pci_dev *pdev, const struct 
			goto error_out_unreg;



	if (drm_core_has_AGP(dev)) {

		if (drm_device_is_agp(dev))

			dev->agp = drm_agp_init(dev);

		if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) {

			DRM_ERROR( "Cannot initialize the agpgart module.\n" );

drivers/char/drm/i810_dma.c

+16 −0
Original line number Diff line number Diff line
@@ -1383,3 +1383,19 @@ drm_ioctl_desc_t i810_ioctls[] = { 
};



int i810_max_ioctl = DRM_ARRAY_SIZE(i810_ioctls);



/**

 * Determine if the device really is AGP or not.

 *

 * All Intel graphics chipsets are treated as AGP, even if they are really

 * PCI-e.

 *

 * \param dev   The device to be tested.

 *

 * \returns

 * A value of 1 is always retured to indictate every i810 is AGP.

 */

int i810_driver_device_is_agp(drm_device_t * dev)

{

	return 1;

}

drivers/char/drm/i810_drv.c

+1 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ static struct drm_driver driver = { 
	.dev_priv_size = sizeof(drm_i810_buf_priv_t),

	.pretakedown = i810_driver_pretakedown,

	.prerelease = i810_driver_prerelease,

	.device_is_agp = i810_driver_device_is_agp,

	.release = i810_driver_release,

	.dma_quiescent = i810_driver_dma_quiescent,

	.reclaim_buffers = i810_reclaim_buffers,

drivers/char/drm/i810_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -120,6 +120,7 @@ extern int i810_driver_dma_quiescent(drm_device_t *dev); 
extern void i810_driver_release(drm_device_t *dev, struct file *filp);

extern void i810_driver_pretakedown(drm_device_t *dev);

extern void i810_driver_prerelease(drm_device_t *dev, DRMFILE filp);

extern int i810_driver_device_is_agp(drm_device_t * dev);



#define I810_BASE(reg)		((unsigned long) \

				dev_priv->mmio_map->handle)

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