> On 22/03/2023 10:24, Akhil R wrote: > > Allocate only one DMA channel for I2C and share it for both TX and RX > > instead of using two different DMA hardware channels with the same > > slave ID. Since I2C supports only half duplex, there is no impact on > > perf with this. > > > > Signed-off-by: Akhil R <akhilrajeev@xxxxxxxxxx> > > Just to confirm. This impacts all Tegra devices from Tegra20 to the > latest. Does this work for all Tegra and the different DMA controllers > that they have? > Yes, It should. I could see in the APB DMA driver that the same channel could be used for TX and RX and the direction is configured only during dma_prep_*() calls. I did not test it on a Tegra with APB DMA, but since it works very similar to GPC DMA there should not be any impact. Regards, Akhil -- nvpublic
