Re: [PATCH 12/19] drm/panel: jadard-jd9365da-h3: support variable DSI configuration

[Linus Walleij]

Hi Dmitry,

thanks for your patch!

On Wed, Apr 1, 2026 at 9:27 AM Dmitry Baryshkov
<dmitry.baryshkov@xxxxxxxxxxxxxxxx> wrote:

> Several panels support attachment either using 4 DSI lanes or just 2. In
> some cases, this requires a different panel mode to fulfill clock
> requirements. Extend the driver to handle such cases by letting the
> panel description to omit lanes specification and parsing number of
> lanes from the DT.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
(...)

> +       if (dsi_ctx->dsi->lanes == 2)
> +               mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x80, 0x01);
> +       else
> +               mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0x80, 0x03);

If lanes 2 we do unexplicable magic A else we do unexplicable magic B?

Do we know more about what is actually going on here?

Can you check the datasheet?

The patch is nice anyway and no big deal so, so +/- that fixup:
Reviewed-by: Linus Walleij <linusw@xxxxxxxxxx>

Yours,
Linus Walleij