Re: imx8mm lcdif->dsi->adv7535 no video, no errors

[Adam Ford <aford173@gmail.com>]

On Mon, Aug 1, 2022 at 8:53 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> On Mon, Aug 1, 2022 at 10:39 PM Adam Ford <aford173@gmail.com> wrote:
>
> > I managed to get my HDMI output working. I had the lanes set to 2
> > instead of 4.  Once I switched to 4-lanes, the monitor came up in
> > 1080p.  I haven't yet been able to get other modes to work.
>
> Ok, good. On another thread, you mentioned that you were also trying
> to get LVDS to work via SN65DSI83.
>
> Does LVDS work for you on this branch?

I haven't tried with Marek's latest suggestion.  In the other thread
he mentioned a burst mode and setting the DSI speeds to higher
frequencies, but the patch he had didn't look like it would apply
cleanly, so I will need to dig into that a bit further.  Since my
company doesn't really ship the LVDS displays with the kits, the HDMI
is the default video, so I've been focusing on it.

To answer Marco's question, I was able to revert "MLK-21958-13:
drm/bridge: adv7511: Limit supported clocks" and still get a display
at 1080p, but all the other resolutions I tried appear to come up
blank.  I didn't try every one.  With that revert, more options come
available, but 1440x900 and 800x600 were options I tried
unsuccessfullyl.

adam