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

[Wolfram Sang]

Hi Laurent,

> > Read out and check the ID registers, so we can bail out if I2C
> > communication does not work or if the device is unknown.
> 
> What's the advantage of that, what are you trying to guard against ?

That a random chip at address 0x2c will be used.

> > Tested on a
> > Renesas GrayHawk board (R-Car V4M) by using a wrong I2C address and by
> > not enabling RuntimePM for the device.
> 
> What do you mean by not enabling runtime PM for the device ?

I left out pm_runtime_get() before regmap_read_bulk().

Happy hacking,

   Wolfram
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