On Thu, 19 Sept 2024 at 11:18, Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> wrote: > > Hi, > > I got a report, that the Linux kernel crashes on Rock 5B when the panthor > driver is loaded late after booting. The crash starts with the following > shortened error print: > > rockchip-pm-domain fd8d8000.power-management:power-controller: failed to set domain 'gpu', val=0 > rockchip-pm-domain fd8d8000.power-management:power-controller: failed to get ack on domain 'gpu', val=0xa9fff > SError Interrupt on CPU4, code 0x00000000be000411 -- SError > > This series first does some cleanups in the Rockchip power domain > driver and changes the driver, so that it no longer tries to continue > when it fails to enable a domain. This gets rid of the SError interrupt > and long backtraces. But the kernel still hangs when it fails to enable > a power domain. I have not done further analysis to check if that can > be avoided. > > Last but not least this provides a fix for the GPU power domain failing > to get enabled - after some testing from my side it seems to require the > GPU voltage supply to be enabled. > > I'm not really happy about the hack to get a regulator for a sub-node, > which I took over from the Mediatek driver. I discussed this with > Chen-Yu Tsai and Heiko Stübner at OSS EU and the plan is: > > 1. Merge Rockchip PM domain driver with this hack for now, since DRM CI > people need it > 2. Chen-Yu will work on a series, which fixes the hack in Mediatek by > introducing a new devm_regulator_get function taking an DT node as > additional argument > 3. Rockchip PM domain later will switch to that once it has landed I have just queued up 2) on my next branch. My suggestion is to skip the intermediate step in 1) and go directly for 3) instead, unless you think there is a problem with that, of course? [...] Kind regards Uffe
