Re: [PATCH v12 00/18] drm: Add Samsung MIPI DSIM bridge

Fabio Estevam
2023-02-14T11:19:08Z

Hi Rasmus,

On Tue, Feb 14, 2023 at 7:55 AM Rasmus Villemoes
<rasmus.villemoes@prevas.dk> wrote:

> Well, the data sheet for the dsi86 says up to 750MHz DSI HS clock, and
> if the value specified in samsung,burst-clock-frequency is twice the DSI
> HS clk, I suppose I should be good up to 1.5GHz? I have tried many
> different values, but I never seem to get anything through; I think I'm
> missing some piece.
>
> So now I've tried to use these patches on the imx8mp-evk with the
> mipi->hdmi accessory from NXP, just to see if I can ever get any
> graphics through the mipi interface. And there the story is the same:
> the adv7535 bridge gets probed, and can read out the edid from the
> monitor over hdmi. And while the mipi block and the bridge seem to
> attach to each other, I still don't get any output.
>
> Do any of you happen to have this working on the imx8mp-evk, and if so,
> can you share the .dts updates you've done and how exactly you test the
> graphics?

I don't have access to an imx8mp-evk, but I tested the ADV7535 MIPI to
HDMI daughter card on an imx8mm-evk.

Some extra ADV7535 patches were needed. Please check patches 0020-0023
and see if they help.