[PATCH] drm: bridge: adv7511: fix reading edid segments

[Emil Abildgaard Svendsen]

On Thu, Oct 26, 2023 at 11:49:00AM -0300, Fabio Estevam wrote:
> Hi Emil,
> 
> On Thu, Oct 26, 2023 at 11:47 AM Emil Abildgaard Svendsen
> <EMAS at bang-olufsen.dk> wrote:
> >
> > Currently reading EDID only works because usually only two EDID blocks
> > of 128 bytes is used. Where an EDID segment holds 256 bytes or two EDID
> > blocks. And the first EDID segment read works fine but E-EDID specifies
> > up to 128 segments.
> >
> > The logic is broken so change EDID segment index to multiple of 256
> > bytes and not 128 (block size).
> >
> > Also change check of DDC status. Instead of silently not reading EDID
> > when in "IDLE" state [1]. Check if the DDC controller is in reset
> > instead (no HPD).
> >
> > [1]
> > ADV7511 Programming Guide: Table 11: DDCController Status:
> >
> >   0xC8 [3:0]  DDC Controller State
> >
> >   0000        In Reset (No Hot Plug Detected)
> >   0001        Reading EDID
> >   0010        IDLE (Waiting for HDCP Requested)
> >   0011        Initializing HDCP
> >   0100        HDCP Enabled
> >   0101        Initializing HDCP Repeater
> >
> > Signed-off-by: Emil Svendsen <emas at bang-olufsen.dk>
> 
> What about passing a Fixes tag?

Thank you! I simply forgot. I will add it.