Re: [PATCH v10 1/5] staging: vc04_services: vchiq_arm: Add new bus type and device type

[Stefan Wahren]

Hi Umang,

Am 12.09.23 um 09:23 schrieb Stefan Wahren:
> Hi Umang,
>
> Am 12.09.23 um 07:50 schrieb Umang Jain:
> > Hi Stephan
> >
> > On 9/12/23 1:52 AM, Stefan Wahren wrote:
> > > Hi Umang,
> > >
> > > Am 11.09.23 um 16:07 schrieb Umang Jain:
> > > > ...
> > >
> > > Unfortunately the call of of_dma_configure() generates warnings likes
> > > this (Raspberry Pi 3A+ with multi_v7_defconfig + VCHIQ):
> > >
> > > [    9.206802] vchiq-bus bcm2835-audio: DMA mask not set
> > > [    9.206892] vchiq-bus bcm2835-camera: DMA mask not set
> >
> > huh, really weird, as on my RPi-3-b I get these set correctly and I
> > don't any such warning.
> This warning comes from this line [1]. Did you test with the mainline
> devicetree from [2] which must be specified in the config.txt? Be
> aware the arm dts files has moved into a sub directory just like
> arm64. I don't use U-Boot, just the vendor bootloader from Raspberry
> Pi OS. Please look at [3] for the details.
please look at [4], which is possible a solution. AFAIK the dwc2 also
had the same problem.

[4] -
https://elixir.bootlin.com/linux/latest/source/drivers/usb/dwc2/platform.c#L448