glamor calls DRM_IOCTL_GEM_FLINK to get a name for a buffer object.
It only works for driver that support GEM, such as intel i915 driver.
But for pvr driver who doesn't has GEM, we can't do it this way.
According to Chris's comments, we check the has_gem as the following
method:
Here we just try to flink handle 0. If that fails with ENODEV or
ENOTTY instead of ENOENT (or EINVAL on older kernels), set has_gem=0.
Signed-off-by: Li Peng <peng.li@intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>
6fb92e67b3