Re: [PATCH 2/3] drm/panfrost: Support cache-coherent integrations

2020-09-17 Thread Steven Price
On 16/09/2020 00:51, Robin Murphy wrote: When the GPU's ACE-Lite interface is fully wired up and capable of snooping CPU caches, it may be described as "dma-coherent" in devicetree, which will already inform the DMA layer not to perform unnecessary cache maintenance. However, we still need to ens

[PATCH 2/3] drm/panfrost: Support cache-coherent integrations

2020-09-15 Thread Robin Murphy
When the GPU's ACE-Lite interface is fully wired up and capable of snooping CPU caches, it may be described as "dma-coherent" in devicetree, which will already inform the DMA layer not to perform unnecessary cache maintenance. However, we still need to ensure that the GPU uses the appropriate cache