Re: [PATCH v4 5/9] ARM: imx_v6_v7_defconfig: build imx sdma driver as module

[Marcel Ziswiler]

On Mon, 2021-09-20 at 16:52 +0200, Marek Vasut wrote:
> On 9/20/21 4:49 PM, Marcel Ziswiler wrote:
> > From: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx>
> > 
> > Build CONFIG_IMX_SDMA as a module to avoid the following boot issue:
> > 
> > [    5.214751] imx-sdma 20ec000.sdma: Direct firmware load for
> >   imx/sdma/sdma-imx6q.bin failed with error -2
> > [    5.215762] imx-sdma 20ec000.sdma: Falling back to sysfs fallback
> >   for: imx/sdma/sdma-imx6q.bin
> 
> Isn't there some ROM-side SDMA firmware baked into the MX6 which is used 
> as a fallback if loading newer one from filesystem fails ? I suspect the 
> default ROM firmware might be buggy.

I'm not so sure about this. At least it seems to fail if no external firmware can be loaded.