[PATCH v3] drm/bridge: ti-sn65dsi86: Check bridge connection failure

[Doug Anderson]

Hi,

On Tue, Mar 18, 2025 at 10:56 AM Doug Anderson <dianders at chromium.org> wrote:
>
> Hi,
>
> On Tue, Mar 18, 2025 at 8:56 AM Wolfram Sang
> <wsa+renesas at sang-engineering.com> wrote:
> >
> > Read out and check the ID registers, so we can bail out if I2C
> > communication does not work or if the device is unknown. Tested on a
> > Renesas GrayHawk board (R-Car V4M) by using a wrong I2C address and by
> > not enabling RuntimePM for the device.
> >
> > Signed-off-by: Wolfram Sang <wsa+renesas at sang-engineering.com>
> > ---
> >
> > Changes since v2:
> > * switched to a new approach suggested by Doug (Thanks!). We add a
> >   dedicated read instead of using the first read. This prevents creating
> >   the aux devices. As a side-gain, we check now if the chip at the address
> >   is really the one we want to support.
> >
> >  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
>
> Looks good to me.
>
> Reviewed-by: Douglas Anderson <dianders at chromium.org>

Pushed to drm-misc-next:

[1/1] drm/bridge: ti-sn65dsi86: Check bridge connection failure
      commit: d69362f55fba92eb4cac10fe8da618de52b49bfc