Re: [PATCH 2/2] spi: qcom-geni: Add property to force GSI mode

[Pengyu Luo]

On Mon, Jun 15, 2026 at 5:18 AM Dmitry Baryshkov
<dmitry.baryshkov@xxxxxxxxxxxxxxxx> wrote:
>
> On Sun, Jun 14, 2026 at 04:34:24PM +0800, Pengyu Luo wrote:
> > Some devices (such as gaokun3) do not disable FIFO mode, causing the
> > driver to fallback to FIFO mode by default. However, these platforms
> > also support GSI mode, which is highly preferred for certain
> > peripherals like SPI touchscreens to improve performance.
> >
> > Introduce the "qcom,force-gsi-mode" device property to hint and force
> > the controller into GSI mode during initialization.
>
> Ideally, this should be decided by the SPI controller based on the
> requirements. Another option would be to prefer GSI for all transfers if
> it is available, ignoring the FIFO even if it is not disabled.
>

I have read reviews. Can we check if the compatible
"qcom,sm6350-gpi-dma" is in DT? If the gpi dma controller is
presented, then we enable GSI mode.

Best wishes,
Pengyu

> >
> > Signed-off-by: Pengyu Luo <mitltlatltl@xxxxxxxxx>
> > ---
> >  drivers/spi/spi-geni-qcom.c | 7 +++++++
> >  1 file changed, 7 insertions(+)
> >
>
> --
> With best wishes
> Dmitry