[PATCH v2] drm/bridge: parade-ps8640: Ensure bridge is suspended in .post_disable()

[Doug Anderson]

Hi,

On Tue, Jan 9, 2024 at 8:52 AM Doug Anderson <dianders at chromium.org> wrote:
>
> Hi,
>
> On Tue, Jan 9, 2024 at 4:05 AM Pin-yen Lin <treapking at chromium.org> wrote:
> >
> > The ps8640 bridge seems to expect everything to be power cycled at the
> > disable process, but sometimes ps8640_aux_transfer() holds the runtime
> > PM reference and prevents the bridge from suspend.
> >
> > Prevent that by introducing a mutex lock between ps8640_aux_transfer()
> > and .post_disable() to make sure the bridge is really powered off.
> >
> > Fixes: 826cff3f7ebb ("drm/bridge: parade-ps8640: Enable runtime power management")
> > Signed-off-by: Pin-yen Lin <treapking at chromium.org>
> > ---
> >
> > Changes in v2:
> > - Use mutex instead of the completion and autosuspend hack
> >
> >  drivers/gpu/drm/bridge/parade-ps8640.c | 16 ++++++++++++++++
> >  1 file changed, 16 insertions(+)
>
> This looks OK to me now.
>
> Reviewed-by: Douglas Anderson <dianders at chromium.org>
>
> I'll let it stew on the mailing list for ~1 week and then land it in
> drm-misc-fixes unless there are additional comments.

Pushed to drm-misc-fixes:

26db46bc9c67 drm/bridge: parade-ps8640: Ensure bridge is suspended in
.post_disable()