On Thu, Nov 10, 2016 at 08:23:39PM +0200, Mikko Perttunen wrote: > On 64-bit Tegras, buffer object memory allocation may > return memory above 4G that units behind Host1x cannot > access. Add the GFP_DMA flag to these allocation when > IOMMU is not enabled to ensure units can always access > BO memory. I don't think that's entirely true. The display controller can address more than 32 bits. It's perhaps slightly different from other units that are behind host1x, but maybe we need a special case here to allow frame- buffers to reside in higher memory? Thierry
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