MIPI DSI driver for imx8mn in linux-fslc

MIPI DSI driver for imx8mn in linux-fslc

[Peter Bergin]

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?

Thanks,
/Peter

Re: [meta-freescale] MIPI DSI driver for imx8mn in linux-fslc

[Fabio Estevam]

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.