linux-kernel - Re: [PATCH RFC 3/3] arm64: dts: qcom: x1e80100: Add ACD levels for GPU

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Message-ID: <9ac861ae-b0b1-4f7a-a002-7d2048132ef3@kernel.org>
Date: Thu, 17 Oct 2024 09:05:50 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Akhil P Oommen <quic_akhilpo@...cinc.com>
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
 Konrad Dybcio <konradybcio@...nel.org>,
 Abhinav Kumar <quic_abhinavk@...cinc.com>,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Marijn Suijten <marijn.suijten@...ainline.org>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 linux-pm@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH RFC 3/3] arm64: dts: qcom: x1e80100: Add ACD levels for
 GPU

On 17/10/2024 08:12, Akhil P Oommen wrote:
> On Wed, Oct 16, 2024 at 09:50:04AM +0200, Krzysztof Kozlowski wrote:
>> On 15/10/2024 21:35, Akhil P Oommen wrote:
>>> On Mon, Oct 14, 2024 at 09:40:13AM +0200, Krzysztof Kozlowski wrote:
>>>> On Sat, Oct 12, 2024 at 01:59:30AM +0530, Akhil P Oommen wrote:
>>>>> Update GPU node to include acd level values.
>>>>>
>>>>> Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
>>>>> ---
>>>>>  arch/arm64/boot/dts/qcom/x1e80100.dtsi | 11 ++++++++++-
>>>>>  1 file changed, 10 insertions(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
>>>>> index a36076e3c56b..e6c500480eb1 100644
>>>>> --- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
>>>>> +++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
>>>>> @@ -3323,60 +3323,69 @@ zap-shader {
>>>>>  			};
>>>>>  
>>>>>  			gpu_opp_table: opp-table {
>>>>> -				compatible = "operating-points-v2";
>>>>> +				compatible = "operating-points-v2-adreno";
>>>>
>>>> This nicely breaks all existing users of this DTS. Sorry, no. We are way
>>>> past initial bringup/development. One year past.
> 
> How do I identify when devicetree is considered stable? An arbitrary
> time period doesn't sound like a good idea. Is there a general consensus
> on this?
> 
> X1E chipset is still considered under development at least till the end of this
> year, right?

Stable could be when people already get their consumer/final product
with it. I got some weeks ago Lenovo T14s laptop and since yesterday
working fine with Ubuntu:
https://discourse.ubuntu.com/t/ubuntu-24-10-concept-snapdragon-x-elite/48800

All chipsets are under development, even old SM8450, but we avoid
breaking it while doing that.



Best regards,
Krzysztof