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Sat, 04 Apr 2026 15:42:26 -0700 (PDT) Date: Sat, 4 Apr 2026 22:42:25 +0000 From: Daniel Bozeman To: shawn.lin@rock-chips.com, finley.xiao@rock-chips.com, jonas@kwiboo.se, ulf.hansson@linaro.org, heiko@sntech.de, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] pmdomain/rockchip: skip QoS operations for idle-only domains Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: References: <20260331180223.1682283-1-daniel@orb.net> <5c8732a3-6cc9-5d02-f56b-fc7ba29c7ce0@rock-chips.com> Further testing with NO kernel patches and fw_devlink=strict reveals both crashes happening simultaneously on different CPUs: CPU1 (genpd_power_off_work_fn): pc : regmap_mmio_read32le+0x8/0x20 Workqueue: pm genpd_power_off_work_fn CPU2 (deferred_probe_work_func): pc : clk_gate_endisable+0xa8/0x130 Workqueue: events_unbound deferred_probe_work_func Kernel panic - not syncing: Asynchronous SError Interrupt This shows there are perhaps two independent issues: 1. genpd tries to power off idle-only domains and crashes in rockchip_pmu_set_idle_request (the regmap read at PMU offset 0x1120 faults) 2. GPIO4 probes while PD_RKVENC is not registered (power domain controller tore down due to PD_GPU EPROBE_DEFER) and crashes in clk_gate_endisable Both crashes occur in the unpatched kernel. Previously we only observed crash #2 because it appeared first in serial output, but maybe they're racing on different CPUs? I also tested removing all pm_qos from all idle-only domains (PD_VO, PD_RKVENC, PD_VPU). Crash #1 still occurs. Because it is in rockchip_pmu_set_idle_request, not in QoS save/restore? fw_devlink=strict does not prevent either crash.