Re: [PATCH] soc: mediatek: mtk-svs: Enable the IRQ later

[AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>]

Il 20/12/22 12:03, Roger Lu (陸瑞傑) ha scritto:
> Hi Matthias Sir,
> 
> After applying this patch, SVS probes fail as below on my MT8192 platform. If
> thing isn't too late, please do not merge this patch. I'll ask Ricardo how to
> reproduce this issue and give the correct solution. Thanks in advance.
> 
> #MT8192 platform SVS probe fail log
> [   10.209430]  SVSB_GPU_LOW: init02 completion timeout
> [   10.214402] mtk-svs 1100b000.svs: svs start fail: -16
> [   10.219479] mtk-svs: probe of 1100b000.svs failed with error -16
> 
> Hi Ricardo,
> 
> Could you share us how you reproduce this issue? I have MT8192 Chromebook and
> can give it a try to reproduce the issue you encountered. Thanks a lot.
> 

Boot a kernel with Kexec to reproduce.

Regards,
Angelo

> Sincerely,
> Roger Lu.
> 
> On Fri, 2022-12-16 at 13:47 +0100, Matthias Brugger wrote:
>>
>> On 30/11/2022 12:00, AngeloGioacchino Del Regno wrote:
>>> Il 27/11/22 21:22, Ricardo Ribalda ha scritto:
>>>> If the system does not come from reset (like when is booted via
>>>> kexec()), the peripheral might triger an IRQ before the data structures
>>>> are initialised.
>>>>
>>>> Fixes:
>>>>
>>>> [    0.227710] Unable to handle kernel NULL pointer dereference at
>>>> virtual
>>>> address 0000000000000f08
>>>> [    0.227913] Call trace:
>>>> [    0.227918]  svs_isr+0x8c/0x538
>>>>
>>>> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
>>>
>>> Reviewed-by: AngeloGioacchino Del Regno <
>>> angelogioacchino.delregno@collabora.com>
>>>
>>>
>>
>> Applied thanks!
>>