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drm/radeon: add new getparam for number of backends.

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This allows userspace to work out how many DBs there are
for conditional rendering to work.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2011-03-01 14:32:27 +10:00
parent 91132d6bb6
commit 486af1896f
3 changed files with 13 additions and 1 deletions
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11
drivers/gpu/drm/radeon/radeon_kms.c
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@@ -205,6 +205,17 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
/* return clock value in KHz */
value = rdev->clock.spll.reference_freq * 10;
break;
case RADEON_INFO_NUM_BACKENDS:
if (rdev->family >= CHIP_CEDAR)
value = rdev->config.evergreen.max_backends;
else if (rdev->family >= CHIP_RV770)
value = rdev->config.rv770.max_backends;
else if (rdev->family >= CHIP_R600)
value = rdev->config.r600.max_backends;
else {
return -EINVAL;
}
break;
default:
DRM_DEBUG_KMS("Invalid request %d\n", info->request);
return -EINVAL;