On Tue, Jan 30, 2024 at 12:14:54PM -0400, Jason Gunthorpe wrote:
> Previously with tegra-smmu, even with CONFIG_IOMMU_DMA, the default domain
> could have been left as NULL. The NULL domain is specially recognized by
> host1x_client_iommu_attach() as meaning it is not the DMA domain and
> should be replaced with the special shared domain.
>
> This happened prior to the below commit because tegra-smmu was using the
> NULL domain to mean IDENTITY.
>
> Now that the domain is properly labled the test in DRM doesn't see NULL.
> Check for IDENTITY as well to enable the special domains.
>
> Fixes: c8cc2655cc6c ("iommu/tegra-smmu: Implement an IDENTITY domain")
> Reported-by: diogo.ivo@xxxxxxxxxxxxxxxxxx
> Closes: https://lore.kernel.org/all/bbmhcoghrprmbdibnjum6lefix2eoquxrde7wyqeulm4xabmlm@b6jy32saugqh/
> Tested-by: diogo.ivo@xxxxxxxxxxxxxxxxxx
> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> ---
> drivers/gpu/drm/tegra/drm.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
Applied, thanks.
--
Jörg Rödel
jroedel@xxxxxxx
SUSE Software Solutions Germany GmbH
Frankenstraße 146
90461 Nürnberg
Germany
https://www.suse.com/
Geschäftsführer: Ivo Totev, Andrew McDonald, Werner Knoblich
(HRB 36809, AG Nürnberg)
