[Qemu-devel] Re: How did you test sound on the Spitz emulation?

[andrzej zaborowski]

2008/7/16 Michael Opdenacker <address@hidden>:
> Hello qemu developers,
>
> I'm trying to test your implementation of sound support in the Sharp
> Spitz machine emulated by qemu...
>
> The problem is that I haven't managed to find a Linux version in which
> sound works.
>
> Here's the command line I used with Linux 2.6.26:
>
> qemu-system-arm -M spitz -show-cursor -soundhw all -m 256 -mtdblock /dev/null 
> -kernel vmlinuz-arm-spitz-2.6.26 -hda root-arm.ext2 -append "root=/dev/hda 
> rootfstype=ext2 rw"
>
> The kernel, root filesystem and the kernel configuration files can be
> found on http://free-electrons.com/issues/qemu/jul16-2008/ (the upload
> will be complete in less than an hour)
>
> Here's what I get in the kernel log when I try to modprobe the
> snd-soc-spitz module (full log on
> http://free-electrons.com/issues/qemu/jul16-2008/dmesg.log)
>
> ASoC version 0.13.2
> WM8750: WM8750 Audio Codec 0.12
> i2c: error: exhausted retries
> i2c: msg_num: 0 msg_idx: -2000 msg_ptr: 0
> i2c: ICR: 000007e0 ISR: 00000002
> i2c: log: [00000442:000007e0]
>
> Here are more details after adding I2C debug options (full log on
> http://free-electrons.com/issues/qemu/jul16-2008/dmesg-debug.log)
>
> ASoC version 0.13.2
> WM8750: WM8750 Audio Codec 0.12
> i2c-core: driver [WM8750 I2C Codec] registered
> i2c-adapter i2c-1: found normal entry for adapter 1, addr 0x1b
> i2c-adapter i2c-1: master_xfer[0] W, addr=0x1b, len=0
> i2c-adapter i2c-1: setting to bus master
> i2c-adapter i2c-1: state:i2c_pxa_handler:876: ISR=00000442,
> ICR=000007e1, IBMR=00
> i2c-adapter i2c-1: state:i2c_pxa_irq_txempty:832: ISR=00000002,
> ICR=000007e0, IBMR=00
> i2c-adapter i2c-1: Retrying transmission
> i2c-adapter i2c-1: setting to bus master
> i2c-adapter i2c-1: state:i2c_pxa_handler:876: ISR=00000442,
> ICR=000007e1, IBMR=00
> i2c-adapter i2c-1: state:i2c_pxa_irq_txempty:832: ISR=00000002,
> ICR=000007e0, IBMR=00
> i2c-adapter i2c-1: Retrying transmission
> i2c-adapter i2c-1: setting to bus master
> i2c-adapter i2c-1: state:i2c_pxa_handler:876: ISR=00000442,
> ICR=000007e1, IBMR=00
> i2c-adapter i2c-1: state:i2c_pxa_irq_txempty:832: ISR=00000002,
> ICR=000007e0, IBMR=00
> i2c-adapter i2c-1: Retrying transmission
> i2c-adapter i2c-1: setting to bus master
> i2c-adapter i2c-1: state:i2c_pxa_handler:876: ISR=00000442,
> ICR=000007e1, IBMR=00
> i2c-adapter i2c-1: state:i2c_pxa_irq_txempty:832: ISR=00000002,
> ICR=000007e0, IBMR=00
> i2c-adapter i2c-1: Retrying transmission
> i2c-adapter i2c-1: setting to bus master
> i2c-adapter i2c-1: state:i2c_pxa_handler:876: ISR=00000442,
> ICR=000007e1, IBMR=00
> i2c-adapter i2c-1: state:i2c_pxa_irq_txempty:832: ISR=00000002,
> ICR=000007e0, IBMR=00
> i2c-adapter i2c-1: Retrying transmission
> i2c-adapter i2c-1: setting to bus master
> i2c-adapter i2c-1: state:i2c_pxa_handler:876: ISR=00000442,
> ICR=000007e1, IBMR=00
> i2c-adapter i2c-1: state:i2c_pxa_irq_txempty:832: ISR=00000002,
> ICR=000007e0, IBMR=00
> i2c-adapter i2c-1: Retrying transmission
> i2c: error: exhausted retries
> i2c: msg_num: 0 msg_idx: -2000 msg_ptr: 0
> i2c: ICR: 000007e0 ISR: 00000002
> i2c: log: [00000442:000007e0]
>
> I also tried 2.6.23, 2.6.24 and 2.6.25, but with no success either. I
> both tested qemu 0.9.1 from Ubuntu Hardy and a svn snapshot I compiled
> yesterday (Jul 15, 2008).
>
> How did you test the emulated WM8750 chip on the Spitz machine? Working
> kernel configurations and qemu command line options are welcome!

I tested it with kernels and rootfs'es from pokylinux.org autobuilder,
but they may have stopped working in the meantime. :(
When I last tried to build a kernel for spitz outside OE, I had to
apply ASoC patches from opensource.wolfsonmicro.com because ASoC was
not in mainline yet (2.6.19 I think).

>
> Are there any other options to get both framebuffer and sound support
> with qemu-system-arm?

Not any of those which have full Linux mainline support. Otherwise
there is the PalmT|E (cheetah), MusicPal and Neo1973.