linux-kernel - Re: [PATCH v2 1/9] dt-bindings: gce: mt8195: Add CMDQ_SYNC_TOKEN_SECURE_THR

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Date:   Wed, 25 Oct 2023 09:03:07 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>,
        "jassisinghbrar@...il.com" <jassisinghbrar@...il.com>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Singo Chang (張興國) 
        <Singo.Chang@...iatek.com>,
        Johnson Wang (王聖鑫) 
        <Johnson.Wang@...iatek.com>,
        Jason-ch Chen (陳建豪) 
        <Jason-ch.Chen@...iatek.com>,
        Shawn Sung (宋孝謙) 
        <Shawn.Sung@...iatek.com>,
        Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>,
        "jkardatzke@...gle.com" <jkardatzke@...gle.com>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>
Subject: Re: [PATCH v2 1/9] dt-bindings: gce: mt8195: Add
 CMDQ_SYNC_TOKEN_SECURE_THR_EOF event id

On 25/10/2023 08:26, Jason-JH Lin (林睿祥) wrote:
> Hi Krzysztof,
> 
> Thanks for the reviews.
> 
> On Mon, 2023-10-23 at 09:47 +0200, Krzysztof Kozlowski wrote:
>>  	 
>> External email : Please do not click links or open attachments until
>> you have verified the sender or the content.
>>  On 23/10/2023 06:37, Jason-JH.Lin wrote:
>>> CMDQ_SYNC_TOKEN_SECURE_THR_EOF is used as secure irq to notify CMDQ
>>> driver in the normal world that GCE secure thread has completed a
>> task
>>> in thee secure world.
>>
>> s/thee/the/
>>
>>>
>>> Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
>>> ---
>>
>> This is a new patch, so you must mention it in the changelog. There
>> is
>> nothing in the changelog saying about this new patch.
>>
>>
>>>  include/dt-bindings/gce/mt8195-gce.h | 6 ++++++
>>>  1 file changed, 6 insertions(+)
>>>
>>> diff --git a/include/dt-bindings/gce/mt8195-gce.h b/include/dt-
>> bindings/gce/mt8195-gce.h
>>> index dcfb302b8a5b..9f99da3363b9 100644
>>> --- a/include/dt-bindings/gce/mt8195-gce.h
>>> +++ b/include/dt-bindings/gce/mt8195-gce.h
>>> @@ -809,4 +809,10 @@
>>>  /* end of hw event */
>>>  #define CMDQ_MAX_HW_EVENT1019
>>>  
>>> +/*
>>> + * Notify normal CMDQ there are some secure task done,
>>> + * this token sync with secure world.
>>> + */
>>> +#define CMDQ_SYNC_TOKEN_SECURE_THR_EOF980
>>
>> Why is this below 1019? Your driver calls it also even, so is this an
>> event or not?
>>
>> Your driver does not use this value, so does it mean FW uses it?
> 
> I just want to separate this kind of event (sw token) from the HW
> event. So I define it after CMDQ_MAX_HW_EVENT.

SW event? Then why is it in the bindings?

Best regards,
Krzysztof