[PATCH] drm/bridge: dw-hdmi: Refuse DDC/CI transfers on the internal I2C controller

[Matthias Kaehlcke]

On Fri, Jul 19, 2019 at 12:23:26PM -0400, Adam Jackson wrote:
> On Thu, 2019-07-18 at 14:41 -0700, Matthias Kaehlcke wrote:
> 
> > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > index 045b1b13fd0e..e49402ebd56f 100644
> > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> > @@ -35,6 +35,7 @@
> >  
> >  #include <media/cec-notifier.h>
> >  
> > +#define DDC_I2C_ADDR		0x37
> 
> This confused the heck out of me to read, DDC by definition happens
> over I2C and this one address is just for a specific subset of DDC.
> Perhaps this would be clearer if it was named DDC_CI_ADDR.

I was also a bit confused about the terminology, some places call 0x37
the DDC address and 0x50 the EDID address.

DDC_CI_ADDR sounds good to me, thanks for the suggestion!

I'll wait a day or two before respinning, for if there are more comments.