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

[Michel Dänzer]

Hi Tom,

On 2017-11-24 05:09 PM, 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.

Which solution do you want to go for?


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer