For gen12+ architectures, i915 no longer supports use of GET_TILING ioctl [1]. This breaks the usage of two libdrm functions on those platforms: drm_intel_bo_gem_create_from_name() and drm_intel_bo_gem_create_from_prime(). We also have IGTs which test drm_intel_gem_bo_flink() followed by drm_intel_bo_gem_create_from_name(), which now fail on these platforms.
As I don't know best fix, this patch is mainly to show the problem and get feedback on what is preferred solution. The proposed solution here is to simply have libdrm ignore EOPNOTSUPP errors and leave the tiling mode set to 0 upon receiving that error. [1] https://lists.freedesktop.org/archives/intel-gfx/2019-August/210960.html Signed-off-by: Brian Welty <brian.we...@intel.com> --- intel/intel_bufmgr_gem.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c index a0cecc96..5160aef1 100644 --- a/intel/intel_bufmgr_gem.c +++ b/intel/intel_bufmgr_gem.c @@ -1152,7 +1152,8 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr, ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling); - if (ret != 0) + /* for EOPNOTSUPP, just use tiling_mode of 0 */ + if (ret != 0 && errno != EOPNOTSUPP) goto err_unref; bo_gem->tiling_mode = get_tiling.tiling_mode; @@ -2753,7 +2754,9 @@ drm_intel_bo_gem_create_from_prime(drm_intel_bufmgr *bufmgr, int prime_fd, int s if (drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling)) - goto err; + /* for EOPNOTSUPP, just use tiling_mode of 0 */ + if (errno != EOPNOTSUPP) + goto err; bo_gem->tiling_mode = get_tiling.tiling_mode; bo_gem->swizzle_mode = get_tiling.swizzle_mode; -- 2.21.0 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
