Hardware 3D acceleration doesn't work anymore with the latest git kernel

[Christian Zigotzky]

On 24.11.2017 17:09, Michel Dänzer wrote:
> On 2017-11-24 03:29 PM, Christian Zigotzky wrote:
>> Hi All,
>>
>> I bisected today and the first bad commit is:
>> a4dec819c8bba6365eb893a4ca88db4dd1210110 (drm/ttm: Add helper functions
>> to populate/map in one call (v2)) [1]
> It can't really be that commit, since it just adds functions but doesn't
> hook them up anywhere. Presumably it's commit
> f7871fd19389c5f64f625a4389675d0740f0dfe4 ("drm/radeon: use new TTM
> populate/dma map helper functions") instead, which makes the radeon
> driver rely on ttm_populate_and_map_pages, which is just a stub
> returning -ENOMEM when neither CONFIG_SWIOTLB nor CONFIG_INTEL_IOMMU is
> enabled.
>
> I can see two possible solutions:
>
> 1. Make ttm_populate_and_map_pages and ttm_unmap_and_unpopulate_pages
>     work without SWIOTLB / INTEL_IOMMU as well.
>
> 2. Make the drivers work without ttm_populate_and_map_pages and
>     ttm_unmap_and_unpopulate_pages again in that case.
>
>
> Solution 1 would be preferable.
>
>
Hello Michel,

I tested the latest git version today. Unfortunately the problem with 
the hardware 3D acceleration still exist. How can I make 
ttm_populate_and_map_pages and ttm_unmap_and_unpopulate_pages work 
without SWIOTLB / INTEL_IOMMU?

Thanks,
Christian