On 08-07-20, 22:01, Bjorn Andersson wrote: > Based on previous attempts and discussions this is the latest attempt at > inheriting stream mappings set up by the bootloader, for e.g. boot splash or > efifb. > > The first patch is an implementation of Robin's suggestion that we should just > mark the relevant stream mappings as BYPASS. Relying on something else to set > up the stream mappings wanted - e.g. by reading it back in platform specific > implementation code. > > The series then tackles the problem seen in most versions of Qualcomm firmware, > that the hypervisor intercepts BYPASS writes and turn them into FAULTs. It does > this by allocating context banks for identity domains as well, with translation > disabled. > > Lastly it amends the stream mapping initialization code to allocate a specific > identity domain that is used for any mappings inherited from the bootloader, if > above Qualcomm quirk is required. > > > The series has been tested and shown to allow booting SDM845, SDM850, SM8150, > SM8250 with boot splash screen setup by the bootloader. Specifically it also > allows the Lenovo Yoga C630 to boot with SMMU and efifb enabled. This resolves issue on RB3 for me so: Tested-by: Vinod Koul <vkoul@xxxxxxxxxx> -- ~Vinod
