Re: [PATCH 2/4 v8] i.MX31: Image Processing Unit DMA and IRQ drivers

[Valentin Longchamp <valentin.longchamp@epfl.ch>]

Guennadi Liakhovetski wrote:
> On Thu, 22 Jan 2009, Valentin Longchamp wrote:
> 
>> Guennadi Liakhovetski wrote:
>>> On Thu, 22 Jan 2009, Valentin Longchamp wrote:
>>>
>>> You need the patch 4/4 - platform bindings, which is not in that queue and
>>> will only be merged in the next kernel version. You can so far pick it up
>>> here:
>>>
>>> http://marc.info/?l=linux-arm-kernel&m=123143901514438&w=2
>>>
>> I have the platform bindings, the ipu-core platform_device (from patch 4/4) is
>> registered on my system. It's only the ipu-core platform_driver  (from patch
>> 2/4) that is not registered and I don't understand why.
> 
> Ok, you didn't mention this in your previous mail. I don't think the 
> platform-driver is not registered. Can you check whether the ipu_init() 
> function gets called? Looks like the ipu platform device is not registered 
> on your system. Look at patch 4/4. In your board code you do something 
> like
> 
> +	mx3_register_fb(fb_modedb[0].name, fb_modedb, ARRAY_SIZE(fb_modedb));

Yes I do this in my board initialisation code. Yes I have it and it also
works, see below.

> 
> in that function
> 
> +	if (!ipu_registered) {
> +		int ret = platform_device_register(&mx3_ipu);

Yes I also have this in my devices.c file (just as you proposed it in
your 4/4 patch). And if works, see below.

> 
> Do you have the ipu platform device under /sys/devices/platform/?
> 

Yes I do have it. But I do not it under /sys/bus/platform/drivers.

> root@mx31moboard:~# ls -al /sys/devices/platform/
> drwxr-xr-x    8 root     root            0 Oct 16 14:04 .
> drwxr-xr-x    4 root     root            0 Oct 16 14:04 ..
> drwxr-xr-x    2 root     root            0 Oct 16 14:04 imx-uart.0
> drwxr-xr-x    2 root     root            0 Oct 16 14:04 imx-uart.1
> drwxr-xr-x    2 root     root            0 Oct 16 14:04 imx-uart.4
> drwxr-xr-x    2 root     root            0 Oct 16 14:04 ipu_core
> drwxr-xr-x    2 root     root            0 Oct 16 14:04 mx3_sdc_fb
> drwxr-xr-x    2 root     root            0 Oct 16 14:04 physmap-flash.0
> -rw-r--r--    1 root     root         4096 Oct 16 14:04 uevent

> root@mx31moboard:~# ls -al /sys/bus/platform/drivers
> drwxr-xr-x    6 root     root            0 Oct 16 13:50 .
> drwxr-xr-x    4 root     root            0 Jan  1  1970 ..
> drwxr-xr-x    2 root     root            0 Jan  1  1970 generic-bl
> drwxr-xr-x    2 root     root            0 Jan  1  1970 imx-uart
> drwxr-xr-x    2 root     root            0 Oct 16 14:05 mx3_sdc_fb
> drwxr-xr-x    2 root     root            0 Jan  1  1970 physmap-flash

So the devices are registered fine. My problem is that the driver is not
registered for me: This should be done by the subsys_initcall but
ipu_init is never called.

Thanks for your help.

Val

-- 
Valentin Longchamp, PhD Student, EPFL-STI-LSRO1
valentin.longchamp@epfl.ch, Phone: +41216937827
http://people.epfl.ch/valentin.longchamp
MEA3485, Station 9, CH-1015 Lausanne


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