Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <1980901a-d525-9147-17bb-1094bf18f711@gmail.com>
Date:   Tue, 2 May 2023 12:57:42 +0200
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.10.0
Subject: Re: [PATCH v3 3/4] dt-bindings: firmware: Add Qualcomm QSEECOM
 interface
Content-Language: en-US
To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Rob Herring <robh@kernel.org>
Cc:     Bjorn Andersson <andersson@kernel.org>,
        Andy Gross <agross@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Ard Biesheuvel <ardb@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Johan Hovold <johan@kernel.org>,
        Sudeep Holla <sudeep.holla@arm.com>,
        Ilias Apalodimas <ilias.apalodimas@linaro.org>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Sumit Garg <sumit.garg@linaro.org>,
        Steev Klimaszewski <steev@kali.org>,
        linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org
References: <20230305022119.1331495-1-luzmaximilian@gmail.com>
 <20230305022119.1331495-4-luzmaximilian@gmail.com>
 <20230308221657.GA3935330-robh@kernel.org>
 <93657561-d545-7ead-7f6c-dd2c62aab319@gmail.com>
 <0fbd5236-d923-0a8d-c7cd-c8e814211651@linaro.org>
From:   Maximilian Luz <luzmaximilian@gmail.com>
In-Reply-To: <0fbd5236-d923-0a8d-c7cd-c8e814211651@linaro.org>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 5/2/23 10:31, Krzysztof Kozlowski wrote:
> On 08/03/2023 23:44, Maximilian Luz wrote:
>> On 3/8/23 23:16, Rob Herring wrote:
>>> On Sun, Mar 05, 2023 at 03:21:18AM +0100, Maximilian Luz wrote:
>>>> Add bindings for the Qualcomm Secure Execution Environment interface
>>>> (QSEECOM).
>>>
>>> Pretty sure I already asked, but no answer in the commit message. Why do
>>> we need this? You've already declared the platform supports SCM calls
>>> with "qcom,scm". Why can't you probe whether you have QSEECOM or not? DT
>>> is for non-discoverable h/w we are stuck with.
>>
>> Yes, you've asked this before but I can only repeat what I've written in
>> my last response to your question: I am not aware of any way to properly
>> discover the interface at runtime from software.
>>
>> If it makes you happy, I can put this in the commit message as well...
> 
> Yes, please, because commit msg should answer to "why we are doing
> this", when this is not obvious. If the reviewer asks the same twice it
> means it is not obvious.

Thanks. Hopefully I can manage to tie that (reliably) to qcom,scm and we
don't need the specific compatible for v4 any more. I will try to be more
descriptive for the next set of patches though.

Regards,
Max