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

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Message-ID: <e0d3f5c7-6f6b-ee21-170c-51e5240de114@gmail.com>
Date:   Tue, 20 Dec 2022 15:50:27 +0100
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Roger Lu (陸瑞傑) <Roger.Lu@...iatek.com>,
        "ribalda@...omium.org" <ribalda@...omium.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>
Cc:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH] soc: mediatek: mtk-svs: Enable the IRQ later



On 20/12/2022 12:03, Roger Lu (陸瑞傑) wrote:
> 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.
> 

Ok, I just dropped the patch from v6.2-tmp/soc branch.

Regards,
Matthias

> #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.
> 
> 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@...omium.org>
>> > 
>> > Reviewed-by: AngeloGioacchino Del Regno <
>> > angelogioacchino.delregno@...labora.com>
>> > 
>> > 
>> 
>> Applied thanks!
>> 
> 
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