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charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: X5VCW7UaSQ86FdS_amGjh7dCQgmLCuFH X-Proofpoint-ORIG-GUID: X5VCW7UaSQ86FdS_amGjh7dCQgmLCuFH X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE3MDEwOSBTYWx0ZWRfX/s4tYbhKza+1 cEPWqVNxxKqmcDVkeEaR6/ZqpsE2scTVpx9BIgxcnIbOmw+xXXTCTLS8TU7k0r00Z+1A0s2iiMR gC4up+NyJpUCjaqrR5Z/jUPLIIs1pkiEhsiHMOg1+daNJ6D08H+IdvJZvbBh1cjyBS+BZtXpVjb XW1LElsmZhodf9+UrKQ3gIIg7dCJJmWeZA99laO/iFDNE9aiSPYBSXvfbIA0gyM9K8CqasXBoMv yxJ2otFnvAeHFu5Yw+xMCyboEslhXqO391fQYq3i4dD8mMRm73usUXKZAx2deudTR2fJ1kd00u5 LEg//4X04BPkk1YSvorr1icBNBCzzTPDpKWAwpOVZW/GF661RDPX9HbYwNXZm89tKxH9OA6hnkX 6c/I3DeC2IN7PhJFz+FyicWasFlJItQSvpmOZWl5jVactbstza3dP3gUQxqq3YBertb0sR6wBOs 9JqSoPj5X2yZfLjCbvQ== X-Authority-Analysis: v=2.4 cv=YqM/gYYX c=1 sm=1 tr=0 ts=6a8316ea cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=HZuXiAIfS_KyvvDLycUA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwODE3MDEwOSBTYWx0ZWRfX3NpAJ0I0jg4s XSk0Hp/hT2FKxHDD6frlHRopnxTiicW2CwxbW/j7QU01vRpSMhCdoEnuHy0hnUkhwHFdB10KEIL +956xh+8E1GaV3byn5aV6ST2+nxG7XY= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-17_01,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 suspectscore=0 adultscore=0 clxscore=1015 bulkscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608170109 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. >    - CORE off, INT2 off >     - CORE on,  INT2 off >     - CORE on,  INT2 on >> If so, perhaps changing the clock driver to make CORE a parent >> of INT2 could be the simpler solution >> >> Konrad > That would still need DT and binding changes -- DPU has to reference INT2_GDSC directly to gate it independently, so it can't be hidden in the clock driver. The two GDSCs have independent GDSCR registers with no HW-enforced sequencing, so they appear to be peers rather than parent/child. No, if that was a reasonable change (which I don't know if it is), the genpd core would take care of enabling the parent before the child, since the genpds are intrinsically hierarchical Konrad