From: Heiko Stuebner <heiko@sntech.de>
To: tomeu@tomeuvizoso.net, robh@kernel.org, krzk+dt@kernel.org,
conor+dt@kernel.org, joro@8bytes.org, will@kernel.org,
robin.murphy@arm.com, ulfh@kernel.org, p.zabel@pengutronix.de,
ogabbay@kernel.org, zhangqing@rock-chips.com,
Jiaxing Hu <gahing@gahingwoo.com>
Cc: royalnet026@gmail.com, abel.vesa@oss.qualcomm.com,
sebastian.reichel@collabora.com, sidong.yang@furiosa.ai,
u.kleine-koenig@baylibre.com, chaoyi.chen@rock-chips.com,
diederik@cknow-tech.com, alchark@flipper.net,
dri-devel@lists.freedesktop.org,
linux-rockchip@lists.infradead.org, iommu@lists.linux.dev,
linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Jiaxing Hu <gahing@gahingwoo.com>
Subject: Re: [PATCH v13 09/14] pmdomain: rockchip: add optional per-domain power-on settle delay
Date: Tue, 22 Sep 2026 00:06:12 +0200 [thread overview]
Message-ID: <15844283.tv2OnDr8pf@phil> (raw)
In-Reply-To: <20260915104328.45901-10-gahing@gahingwoo.com>
Hi,
Am Dienstag, 15. September 2026, 12:43:23 Mitteleuropäische Sommerzeit schrieb Jiaxing Hu:
> The RK3576 NPU domains need a short settle time after the idle request is
> released before the registers behind the domain answer. Without it the QoS
> writes that rockchip_pmu_restore_qos() issues land while the domain is
> still coming up, and the NPU throws an async SError on the first cold
> power-on.
are you really really sure, this is the fault of the domain itself?
The regulator also can just need a longer time to bring up the power.
Looking at [0], it seems I actually encountered the same thing back
on the RK3588.
Only difference is, on RK3588 a fan5355-type regulator normally does
provide the npu supply, while on your board it comes from the main pmic.
Can you please try the following:
- set your power-domain regulator to always-on in the DT (so it stays
on even when the domain gets turned off)
- try to reproduce your SError issue and see if it still appears
And for the other case, look through the pmic datasheet to find the
enable-time values and do something similar for the RK806.
Thanks a lot
Heiko
[0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8acfb165a492251a08a22a4fa6497a131e8c2609
next prev parent reply other threads:[~2026-09-21 22:06 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-15 10:43 [PATCH v13 00/14] accel/rocket: RK3576 NPU (RKNN) enablement Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 01/14] accel/rocket: request the core clocks by name Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 02/14] accel/rocket: take the completion register writes under job_lock Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 03/14] accel/rocket: wait for a running IRQ handler before resetting a core Jiaxing Hu
2026-09-16 13:28 ` Igor Paunovic
2026-09-15 10:43 ` [PATCH v13 04/14] accel/rocket: let the core suspend after a reset Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 05/14] accel/rocket: factor the completion tail out of the IRQ handler Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 06/14] dt-bindings: npu: rockchip: add rockchip,rk3576-rknn-core Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 07/14] dt-bindings: power: rockchip: allow resets in a power domain node Jiaxing Hu
2026-09-21 21:52 ` Heiko Stuebner
2026-09-15 10:43 ` [PATCH v13 08/14] dt-bindings: iommu: rockchip: describe the RK3576 NPU MMU Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 09/14] pmdomain: rockchip: add optional per-domain power-on settle delay Jiaxing Hu
2026-09-21 12:41 ` Ulf Hansson
2026-09-21 22:06 ` Heiko Stuebner [this message]
2026-09-22 1:28 ` Chaoyi Chen
2026-09-15 10:43 ` [PATCH v13 10/14] pmdomain: rockchip: cycle optional power-domain resets on power-on Jiaxing Hu
2026-09-21 12:43 ` Ulf Hansson
2026-09-15 10:43 ` [PATCH v13 11/14] accel/rocket: select the per-core clock and reset counts from match data Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 12/14] accel/rocket: add RK3576 NPU (RKNN) support Jiaxing Hu
2026-09-15 10:43 ` [PATCH v13 13/14] arm64: dts: rockchip: add NPU (RKNN) nodes to rk3576 Jiaxing Hu
2026-09-21 21:51 ` Heiko Stuebner
2026-09-15 10:43 ` [PATCH v13 14/14] arm64: dts: rockchip: enable the NPU on rk3576-rock-4d Jiaxing Hu
2026-09-19 7:32 ` [PATCH v13 00/14] accel/rocket: RK3576 NPU (RKNN) enablement Sidong Yang
2026-09-21 12:46 ` Ulf Hansson
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