Commit 43861f71 authored by Marek Olšák's avatar Marek Olšák Committed by Dave Airlie
Browse files

drm/radeon: add a way to revoke hyper-z access 



Signed-off-by: default avatarMarek Olšák <maraeo@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent c17c2f89

drivers/gpu/drm/radeon/radeon_kms.c

+19 −5
Original line number Diff line number Diff line
@@ -162,13 +162,27 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) 
			return -EINVAL;

		}

	case RADEON_INFO_WANT_HYPERZ:

		/* The "value" here is both an input and output parameter.

		 * If the input value is 1, filp requests hyper-z access.

		 * If the input value is 0, filp revokes its hyper-z access.

		 *

		 * When returning, the value is 1 if filp owns hyper-z access,

		 * 0 otherwise. */

		if (value >= 2) {

			DRM_DEBUG_KMS("WANT_HYPERZ: invalid value %d\n", value);

			return -EINVAL;

		}

		mutex_lock(&dev->struct_mutex);

		if (rdev->hyperz_filp)

			value = 0;

		else {

		if (value == 1) {

			/* wants hyper-z */

			if (!rdev->hyperz_filp)

				rdev->hyperz_filp = filp;

			value = 1;

		} else if (value == 0) {

			/* revokes hyper-z */

			if (rdev->hyperz_filp == filp)

				rdev->hyperz_filp = NULL;

		}

		value = rdev->hyperz_filp == filp ?  1 : 0;

		mutex_unlock(&dev->struct_mutex);

		break;

	default: