On Mon, Nov 27, 2017 at 9:34 AM, Jonathan Neuschäfer <j.neuschaefer@xxxxxxx> wrote: > Hi, > > On Mon, Nov 27, 2017 at 11:44:57AM +0000, srinivas.kandagatla@xxxxxxxxxx wrote: >> From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> >> >> MSM IOMMU is required for apq8064 display, so enable it by default. > > What exactly do you mean by "display"? Which ip block requires IOMMU > support? > display block in apq8064 is mdp4 (drivers/gpu/drm/msm/mdp/mdp4).. technically it can use iommu in bypass mode w/ physically contiguous memory, but no one wants to do that, if they don't have to. The gpu does have a hard requirement on iommu. BR, -R -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
