Hi Nicolas,

On 1/24/20 4:47 PM, Nicolas Saenz Julienne wrote:

quoted

If you need MMC rootfs then the DMA needs to be built in or have initrd
with the modules.
The driver expects to have DMA channel and it is going to wait for it to
appear unless the request fails.

Without moving the DMA as built in and removing the deferred probe
handling form the MMC driver, one can just remove the DMA support from
the mmc-bcm2835 as it is not used at all.

Oh sorry, I meant to ask if the 'Fixes:' tag was really needed.

Complements: or Needed-for: would be better, but with the Fixed tag this
patch would be picked in case the dma_request_chan() conversion patch
gets backported for stable.

The
patch itself is very much needed since not everyone uses initrds in the
RPi world, and we want to keep being compatible as much as possible with
older device-trees.

Sure. Just checked on my RPi with libreELEC that at least they have the
DMA built in, I assume other distros do the same.

It would be great if this patch would make it to linux-next as soon as
it is possible for sure.

quoted

I wonder why this is not signaled by automated boot testing, if any
exists for bcm2835>

Actually now that you mention it, it's failing since today here:
https://kernelci.org/boot/bcm2837-rpi-3-b/

Oh, so you can even have a bug report to back this patch ;)

- Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

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