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

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, 29 Nov 2024 at 09:59, Xiangxu Yin <quic_xiangxuy@xxxxxxxxxxx> 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@xxxxxxxxxxx>
> ---
>  drivers/gpu/drm/msm/dp/dp_display.c | 83 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 83 insertions(+)


-- 
With best wishes
Dmitry




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [Linux for Sparc]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux