On 8/26/26 4:53 AM, Yongxing Mou wrote: > > > On 8/25/2026 4:30 PM, Konrad Dybcio wrote: >> On 8/25/26 8:28 AM, Yongxing Mou wrote: >>> >>> >>> 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 >>> Hi, Konard. Would you recommend adding the parent clock in the clock >>> driver, or handling 2 GDSC in the display driver? I'm preparing the next >>> revision and would appreciate your feedback. >> >> Does disabling INT2 provide us with any power benefits and will the > So far, I haven't found any documentation that explicitly describes a > power-saving use case achieved by disabling the INT2 GDSC. The material I > found instead describes it in the context of display tiering: > "Goal for partial display is to tier down from premium tier to match low tier > pipe configurations." >> display driver do the accounting for what resources need the INT2 >> GDSC specifically? > Not at the moment. Our current requirement is simply to enable and disable it > together with the core GDSC.
So WDYT Dmitry, should we just wire it up as a child of the core gdsc on the clk side and pass just one gdsc to mdss? Konrad
