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Message-ID: <6311f26f-79ee-c471-649f-5e0b4629cfcc@linaro.org>
Date:   Mon, 26 Jun 2023 20:29:37 +0200
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Subject: Re: [PATCH 03/15] dt-bindings: clock: qcom,dispcc-sm6125: Require GCC
 PLL0 DIV clock
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To:     Marijn Suijten <marijn.suijten@somainline.org>
Cc:     Konrad Dybcio <konrad.dybcio@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Rob Clark <robdclark@gmail.com>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Krishna Manikandan <quic_mkrishn@quicinc.com>,
        ~postmarketos/upstreaming@lists.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Martin Botka <martin.botka@somainline.org>,
        Jami Kettunen <jami.kettunen@somainline.org>,
        linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Krzysztof Kozlowski <krzk@kernel.org>,
        linux-clk@vger.kernel.org, dri-devel@lists.freedesktop.org,
        freedreno@lists.freedesktop.org, Lux Aliaga <they@mint.lgbt>
References: <20230624-sm6125-dpu-v1-0-1d5a638cebf2@somainline.org>
 <20230624-sm6125-dpu-v1-3-1d5a638cebf2@somainline.org>
 <c9681bce-efa8-9b79-4bf6-837dd6a2dc12@linaro.org>
 <55b0ca89-8f2e-5383-59d4-6809e813abf8@linaro.org>
 <vnp263d43flny2ibt3n7fbloyi26enqrejnobogplfu5fcj6l3@s7zkxrsi2rde>
 <52c57cab-10cf-2e7e-2c1d-fa6506786d45@linaro.org>
 <jmtjuya4c423rmdlo4ubvvqndbxvgapal5otjqnejdpdd25izp@kewbjmqdu2xs>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <jmtjuya4c423rmdlo4ubvvqndbxvgapal5otjqnejdpdd25izp@kewbjmqdu2xs>
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Precedence: bulk

On 26/06/2023 19:49, Marijn Suijten wrote:
> On 2023-06-26 18:10:44, Krzysztof Kozlowski wrote:
>> On 25/06/2023 21:48, Marijn Suijten wrote:
>>> On 2023-06-24 11:08:54, Krzysztof Kozlowski wrote:
>>>> On 24/06/2023 03:45, Konrad Dybcio wrote:
>>>>> On 24.06.2023 02:41, Marijn Suijten wrote:
>>>>>> The "gcc_disp_gpll0_div_clk_src" clock is consumed by the driver, will
>>>>>> be passed from DT, and should be required by the bindings.
>>>>>>
>>>>>> Fixes: 8397c9c0c26b ("dt-bindings: clock: add QCOM SM6125 display clock bindings")
>>>>>> Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
>>>>>> ---
>>>>> Ideally, you'd stick it at the bottom of the list, as the items: order
>>>>> is part of the ABI
>>>>
>>>> Yes, please add them to the end. Order is fixed.
>>>
>>> Disagreed for bindings that declare clock-names and when the driver
>>> adheres to it, see my reply to Konrad's message.
>>
>> That's the generic rule, with some exceptions of course. Whether one
>> chosen driver (chosen system and chosen version of that system) adheres
>> or not, does not change it. Other driver behaves differently and ABI is
>> for everyone, not only for your specific version of Linux driver.
>>
>> Follow the rule.
> 
> This has no relation to the driver (just that our driver adheres to the
> bindings, as it is supposed to be).  The bindings define a mapping from
> a clock-names=<> entry to a clock on the same index in the clocks=<>
> array.  That relation remains the same with this change.

Not really, binding also defines the list of clocks - their order and
specific entries. This changes.

Best regards,
Krzysztof