On Wednesday 25 September 2013 12:21:04 Laurent Pinchart wrote:
> Hi Valentine,
>
> Thank you for the patch.
>
> Please see below for a couple of comments (in addition to Hans' and
> Guennadi's comments).
>
> On Tuesday 24 September 2013 17:38:34 Valentine Barshak wrote:
> > This adds ADV7611/ADV7612 Dual Port Xpressview
> > 225 MHz HDMI Receiver support.
> >
> > The code is based on the ADV7604 driver, and ADV7612 patch
> > by Shinobu Uehara <shinobu.uehara...@renesas.com>
> >
> > Signed-off-by: Valentine Barshak <valentine.bars...@cogentembedded.com>
> > ---
[snip]
> > +static int adv761x_set_edid(struct v4l2_subdev *sd,
> > + struct v4l2_subdev_edid *edid)
> > +{
> > + struct adv761x_state *state = to_state(sd);
> > + int ret;
> > +
> > + if (edid->pad != 0)
> > + return -EINVAL;
> > +
> > + if (edid->start_block != 0)
> > + return -EINVAL;
> > +
> > + if (edid->blocks == 0) {
> > + /* Pull down the hotplug pin */
> > + v4l2_subdev_notify(sd, ADV761X_HOTPLUG, (void *)0);
> > + /* Disables I2C access to internal EDID ram from DDC port */
> > + rep_write(sd, 0x74, 0x0);
> > + state->edid_blocks = 0;
> > + return 0;
> > + }
> > +
> > + if (edid->blocks > 2)
> > + return -E2BIG;
> > +
> > + if (!edid->edid)
> > + return -EINVAL;
> > +
> > + memcpy(state->edid, edid->edid, 128 * edid->blocks);
> > + state->edid_blocks = edid->blocks;
> > +
> > + ret = edid_write_block(sd, 128 * edid->blocks, state->edid);
> > + if (ret < 0)
> > + v4l2_err(sd, "error %d writing edid\n", ret);
>
> Stupid question, what are the use cases for setting EDID on an HDMI receiver
> ? Isn't that something that should just be read from the device ?
My bad, scratch this, I got the chip mixed with an HDMI transmitter.
> > +
> > + return ret;
> > +}
--
Regards,
Laurent Pinchart
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