Re: [PATCH 1/2] drm/msm/dpu: fix mismatch between power and frequency

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 3/2/26 2:28 PM, Dmitry Baryshkov wrote:
> On Mon, Mar 02, 2026 at 11:41:59AM +0100, Konrad Dybcio wrote:
>> On 2/27/26 8:05 PM, Dmitry Baryshkov wrote:
>>> On Fri, Feb 27, 2026 at 12:34:04PM +0100, Konrad Dybcio wrote:
>>>> On 2/27/26 4:48 AM, Dmitry Baryshkov wrote:
>>>>> On Thu, Feb 26, 2026 at 02:35:52PM +0100, Konrad Dybcio wrote:
>>>>>> On 1/12/26 9:25 AM, yuanjiey wrote:
>>>>>>> On Mon, Jan 12, 2026 at 09:38:41AM +0200, Dmitry Baryshkov wrote:
>>>>>>>> On Mon, 12 Jan 2026 at 08:23, yuanjiey <yuanjie.yang@oss.qualcomm.com> wrote:
>>>>>>>>>
>>>>>>>>> On Fri, Jan 09, 2026 at 05:22:37PM +0200, Dmitry Baryshkov wrote:
>>>>>>>>>> On Fri, Jan 09, 2026 at 04:38:07PM +0800, yuanjie yang wrote:
>>>>>>>>>>> From: Yuanjie Yang <yuanjie.yang@oss.qualcomm.com>

[...]

>>> 1.0  - old MSM8974
>>>        I'd rather not touch it, it had bugs and I don't have HW
>>
>> I have reasons to believe msm8974 v1.0 never reached store shelves.
>> Let's remove this.
> 
> Please send a patch ;-)

done!

> 
>>
>>> 1.1  - MSM8x26
>>>        Probably Luca can better comment on it. Should be doable, but I
>>>        don't see upstream devices using display on it.
>>
>> Because there's no iommu support for these
> 
> I promised to put it on my todo list, but the list is very long.
> 
>>
>>> 1.2  - MSM8974
>>>        I think it also had issues, no IOMMU support in upstream, etc.
>>> 1.3  - APQ8084
>>>        Had hw issues, no testing base, no MDSS in upstream DT
>>> 1.6  - MSM8916 / MSM8939
>>>        Can be done, low-hanging fruit for testing
>>> 1.7  - MSM8996
>>>        Supported in DPU
>>> 1.8  - MSM8936
>>>        No upsteram testing base
>>
>> 8936 is 39 with some CPUs fused off (unless you have info suggesting
>> otherwise)
> 
> Hmm, you added 8x36 to mdp5_cfg.c, stating it is 1.8. See commit
> 81c4389e4835 ("drm/msm/mdp5: Add MDP5 configuration for MSM8x36.")
> Author: Konrad Dybcio <konradybcio@gmail.com>
> 
> Please remove it from the mdp5_cfg to avoid confusion.

v1.6 is strictly for 8916. 8936/39 both use v1.8.

>>> 1.9  - MSM8994
>>>        No upstream testing base, no MDSS in upstream DT, normal CURSOR planes
>>> 1.10 - MSM8992
>>>        Even less testing base, no MDSS in upstream DT, normal CURSOR planes
>>> 1.11 - MSM8956 / 76
>>>        No complete display configurations upstream
>>
>> +Marijn, is your computer museum still running?
> 
> Should we open a Qualcomm Virtual Museum?

Maybe someone has a drawer full of QSD8250s!

> 
>>
>>> 1.14 - MSM8937
>>>        Supported in DPU
>>> 1.15 - MSM8917
>>>        Supported in DPU
>>> 1.16 - MSM8953
>>>        Supported in DPU
>>> 1.17 - QCS405
>>>        Zero testing base, no MDSS in upstream DT
>>
>> No upstream MDP5 support either. And it doesn't seem like that SoC had
>> much uses that didn't end up with the thing glued shut..
> 
> I saw and touched devices, but that was display-less version.

Only further confirming it's not worth pursuing

Konrad