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In-Reply-To: <50c2626d-028a-6840-08fb-bf61e069a29d@berginkonsult.se>
From: "Fabio Estevam" <festevam@gmail.com>
Date: Sat, 27 Mar 2021 11:53:44 -0300
Message-ID: <CAOMZO5B5hzF7CySms6LWqVP+KSWgV+G8-hPWqbThok__e4f6TA@mail.gmail.com>
Subject: Re: [meta-freescale] MIPI DSI driver for imx8mn in linux-fslc
To: Peter Bergin <peter@berginkonsult.se>
Cc: "meta-freescale@lists.yoctoproject.org" <meta-freescale@lists.yoctoproject.org>
Content-Type: text/plain; charset="UTF-8"

Hi Peter,

On Fri, Mar 26, 2021 at 11:34 AM Peter Bergin <peter@berginkonsult.se> wrote:
>
> Hi,
>
> I did a try to bring up mainline-bsp on a i.Mx8mn EVK (imx8mn-ddr4-evk)
> to try graphics. My EVK has a IMX-MIPI-HDMI adapter attached. When
> booting this setup with mainline-bsp (Linux imx8mn-ddr4-evk
> 5.10.25+g07073b4e6808) I get no drm device in the system. Digging in to
> this I can not find any mips-dsi on the aips4 bus in the device-tree and
> I can not find any driver for it in the kernel tree for linux-fslc
> (branch 5.10.x+fslc).
>
> In linux-imx there is a driver in
> drivers/gpu/drm/imx/sec_mipi_dsim-imx.c that defines  '.compatible =
> "fsl,imx8mn-mipi-dsim",' I can not find its counterpart in linux-fslc.
> My conclusion at the moment is that MIPI-DSI support for imx8mn is not
> ready upstream. Is this a correct conclusion or have I missed something?

Yes, you are correct. There is no i.MX8MM MIPI DSI support in mainline yet.