On Thu, Dec 26, 2019 at 02:17:06PM -0800, Bjorn Andersson wrote: > These patches implements the stream mapping inheritance that's necessary in > order to not hit a security violation as the display hardware looses its stream > mapping during initialization of arm-smmu in various Qualcomm platforms. > > This was previously posted as an RFC [1], changes since then involves the > rebase and migration of the read-back code to the Qualcomm specific > implementation, the mapping is maintained indefinitely - to handle probe > deferring clients - and rewritten commit messages. I don't think we should solve this in a Qualcomm-specific manner. Please can you take a look at the proposal from Thierry [1] and see whether or not it works for you? Thanks, Will [1] https://lore.kernel.org/lkml/20191209150748.2471814-1-thierry.reding@xxxxxxxxx
