linux-kernel - Re: [PATCH RFT v6 2/5] drm/msm/adreno: Add speedbin data for SM8550 / A740

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Message-ID: <1903ee8a-f819-4a4d-baee-90f35e0da290@quicinc.com>
Date: Sun, 11 May 2025 15:21:57 +0530
From: Akhil P Oommen <quic_akhilpo@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        <neil.armstrong@...aro.org>
CC: Konrad Dybcio <konradybcio@...nel.org>, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>, Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <lumag@...nel.org>, David Airlie <airlied@...il.com>,
        "Simona Vetter" <simona@...ll.ch>,
        Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Marijn Suijten
	<marijn.suijten@...ainline.org>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        Konrad Dybcio
	<konrad.dybcio@...aro.org>
Subject: Re: [PATCH RFT v6 2/5] drm/msm/adreno: Add speedbin data for SM8550 /
 A740

On 5/1/2025 9:23 PM, Konrad Dybcio wrote:
> On 5/1/25 11:29 AM, Akhil P Oommen wrote:
>> On 4/30/2025 10:26 PM, neil.armstrong@...aro.org wrote:
>>> On 30/04/2025 18:39, Konrad Dybcio wrote:
>>>> On 4/30/25 6:19 PM, neil.armstrong@...aro.org wrote:
>>>>> On 30/04/2025 17:36, Konrad Dybcio wrote:
>>>>>> On 4/30/25 4:49 PM, neil.armstrong@...aro.org wrote:
>>>>>>> On 30/04/2025 15:09, Konrad Dybcio wrote:
>>>>>>>> On 4/30/25 2:49 PM, neil.armstrong@...aro.org wrote:
>>>>>>>>> On 30/04/2025 14:35, Konrad Dybcio wrote:
>>>>>>>>>> On 4/30/25 2:26 PM, neil.armstrong@...aro.org wrote:
> 
> [...]
> 
>>> This behaves exactly as I said, so please fix it.
> 
> Eh, I was so sure I tested things correctly..
> 
>>
>> Konrad,
>>
>> iirc, we discussed this in one of the earlier revision. There is a
>> circular dependency between the driver change for SKU support and the dt
>> change that adds supported_hw bitmask in opp-table. Only scenario it
>> works is when you add these to the initial patches series of a new GPU.
>>
>> It will be very useful if we can break this circular dependency.
> 
> Right. Let's start with getting that in order

Another complication with the socinfo is that the value is unique for a
chipset, not for a GPU. So, it won't work if we keep this data in GPU
list in the driver.

Downstream solved this problem by keeping the PCODE/FCODE mappings in
the devicetree.

-Akhil.

> 
> Konrad