drm/radeon: add a way to revoke hyper-z access (43861f71) · Commits · e / devices / android_kernel_oneplus_sm7250

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: