From: Robin Murphy <robin.murphy@xxxxxxx> commit 03544505cb10ddc73df3b6176e71cdb366834134 upstream. According to a downstream commit I found in the Khadas vendor kernel, the GPU on G12b is wired up for ACE-lite, so (now that Panfrost knows how to handle this properly) we should describe it as such. Otherwise the mismatch leads to all manner of fun with mismatched attributes and inadvertently snooping stale data from caches, which would account for at least some of the brokenness observed on this platform. Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx> Tested-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx> Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx> Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/765446e529e50b304af63432da7836c4d31eb8d4.1600780574.git.robin.murphy@xxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm64/boot/dts/amlogic/meson-g12b.dtsi | 4 ++++ 1 file changed, 4 insertions(+) --- a/arch/arm64/boot/dts/amlogic/meson-g12b.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-g12b.dtsi @@ -135,3 +135,7 @@ }; }; }; + +&mali { + dma-coherent; +};
