Re: [PATCH 1/3] dt-bindings: display: msm: Allow two MDSS power domains

[Yongxing Mou <yongxing.mou@oss.qualcomm.com>]

On 8/17/2026 10:14 PM, Konrad Dybcio wrote:
> On 8/17/26 4:13 PM, Konrad Dybcio wrote:
>> On 8/13/26 9:44 AM, Yongxing Mou wrote:
>>>
>>>
>>> On 7/20/2026 4:49 PM, Konrad Dybcio wrote:
>>>> On 7/20/26 10:43 AM, Yongxing Mou wrote:
>>>>> Kaanapali (SM8750) and Glymur use two display power domains.
>>>>> CORE_GDSC powers the main display hardware while INT2_GDSC
>>>>> powers a subset of SSPP blocks.
>>>>
>>>> Can they operate independently? Does INT2_GDSC need to be
>>>> powered on after CORE_GDSC?
>>>>
>>> On Kaanapali, my understanding is that CORE_GDSC and INT2_GDSC should generally track the same state, except that INT2_GDSC may be powered down when SSPP1 (VIG2/VIG3/DMA5) is unused.
>>
>> Is the MDSS any useful if *only* INT2_GDSC is enabled? Can the INT2_GDSC
>> be enabled itself if CORE_GDSC is off?
> 
> (I didn't quite know how to parse the list of states you provided in your
> reply so I asked again)
> 
> Konrad
Sorry, here INT2_GDSC can be on only when CORE_GDSC is on. And power 
sequence is:
Power down sequence: MDSS_INT2 > MDSS_INT >
Power up sequence: MDSS_INT > MDSS_INT2