[PATCH 8/8] drm/msm/dp: Support external GPIO HPD with 3rd pinctrl chip

[Dmitry Baryshkov]

On Fri, 29 Nov 2024 at 09:59, Xiangxu Yin <quic_xiangxuy at quicinc.com> wrote:
>
> Add support for handling HPD (Hot Plug Detect) signals via external
> GPIOs connected through pinctrl chips (e.g., Semtech SX1509Q). This
> involves reinitializing the relevant GPIO and binding an interrupt
> handler to process hot plug events. Since external GPIOs only support
> edge interrupts (rising or falling) rather than state interrupts, the
> GPIO state must be read during the first DP bridge HPD enablement. This
> ensures the current connection state is determined and a hot plug event
> is reported accordingly.

NAK, use dp-connector instead.

>
> Signed-off-by: Xiangxu Yin <quic_xiangxuy at quicinc.com>
> ---
>  drivers/gpu/drm/msm/dp/dp_display.c | 83 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 83 insertions(+)


-- 
With best wishes
Dmitry