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Fri, 03 Apr 2026 14:27:18 -0700 (PDT) Date: Fri, 3 Apr 2026 21:27:18 +0000 From: Daniel Bozeman To: shawn.lin@rock-chips.com, finley.xiao@rock-chips.com, 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-pm@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> I ran both tests you requested: Test 1: Added pr_err to rockchip_pd_power_on/off to identify the crashing domain. With patch 2 only (skip EPROBE_DEFER), the crash occurs on PD_VO: rockchip_pd_power_off: vo pwr_mask=0x0 Internal error: synchronous external abort: 0000000096000010 Workqueue: pm genpd_power_off_work_fn Call trace: regmap_mmio_read32le+0x8/0x20 _regmap_bus_reg_read+0x6c/0xac _regmap_read+0x60/0xd8 regmap_read+0x4c/0x7c rockchip_pmu_set_idle_request.isra.0+0x98/0x16c rockchip_pd_power+0x130/0x48c rockchip_pd_power_off+0x38/0x48 genpd_power_off.isra.0+0x1f0/0x2f0 genpd_power_off_work_fn+0x34/0x54 Test 2: Same debug build, booted with clk_ignore_unused added to kernel cmdline via U-Boot. Same crash, same domain: rockchip_pd_power_off: vo pwr_mask=0x0 Internal error: synchronous external abort: 0000000096000010 (identical call trace) The crash occurs even with clk_ignore_unused. The QoS registers for PD_VO are inaccessible when genpd attempts to power off this idle-only domain.