[RESEND PATCH v11 13/18] drm: exynos: dsi: Add Exynos based host irq hooks

[Jagan Teki]

On Wed, Jan 25, 2023 at 2:42 AM Marek Vasut <marex at denx.de> wrote:
>
> On 1/24/23 22:01, Jagan Teki wrote:
> > On Wed, Jan 25, 2023 at 2:18 AM Marek Vasut <marex at denx.de> wrote:
> >>
> >> On 1/23/23 16:12, Jagan Teki wrote:
> >>> Enable and disable of te_gpio's are Exynos platform specific
> >>> irq handling, so add the exynos based irq operations and hook
> >>> them for exynos plat_data.
> >>
> >> If this is just an optional generic GPIO IRQ, why not keep it in the
> >> core code ? TE (tearing enable?) should be available on MX8M too.
> >
> > So far the discussion (since from initial versions) with Marek
> > Szyprowski, seems to be available in Exynos. So, I keep it separate
> > from the DSIM core.
>
> Isn't TE a generic GPIO IRQ ? If so, it is available also on i.MX8M .

I didn't find this in the DSIM part in i.MX8M Manual nor in the i.MX
8/RT MIPI DSI/CSI-2 or bsp kernel [1], did you find anywhere in i.MX8M
part? Look like TE GPIO means tearing effect signal handle on the
panel side.

from, Documentation/devicetree/bindings/display/panel/panel-common.yaml

  te-gpios:
    maxItems: 1
    description:
      GPIO spec for the tearing effect synchronization signal.
      The tearing effect signal is active high. Active low signals can be
      supported by inverting the GPIO specifier polarity flag.

Maybe Exynos hack this gpio on the host side instead of on the panel
side for some reason, not sure about it - Marek Szypeowski any
comments please?

[1] https://source.codeaurora.org/external/imx/linux-imx/tree/drivers/gpu/drm/bridge/sec-dsim.c?h=imx_5.4.47_2.2.0

Thanks,
Jagan.