On Fri, Aug 13, 2021 at 2:57 PM Yong Wu <yong.wu@xxxxxxxxxxxx> wrote: > > Prepare for 2 HWs that sharing pgtable in different power-domains. > > The previous SoC don't have PM. Only mt8192 has power-domain, > and it is display's power-domain which nearly always is enabled. > > When there are 2 M4U HWs, it may has problem. > In this function, we get the pm_status via the m4u dev, but it don't > reflect the real power-domain status of the HW since there may be other > HW also use that power-domain. > > Currently we could not get the real power-domain status, thus always > pm_runtime_get here. > > Prepare for mt8195, thus, no need fix tags here. > > This patch may drop the performance, we expect the user could > pm_runtime_get_sync before dma_alloc_attrs which need tlb ops. Can you check if there are existing users that need to add this change? > > Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx> > --- <snip>
