On 24.11.2017 20:08, Christian Zigotzky wrote:
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
Just for info:
CONFIG_SWIOTLB is not set and CONFIG_PPC_PASEMI_IOMMU is enabled.
-- Christian
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