From: sashiko-bot@kernel.org
To: "Encrow Thorne" <encrow.thorne@linux.spacemit.com>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH v2] PCI: spacemit: Ignore PERST# input in RC mode on K1
Date: Fri, 06 Nov 2026 02:16:31 +0000 [thread overview]
Message-ID: <sashiko-outbox-200585@kernel.org> (raw)
In-Reply-To: <20261106-spacemit-k1-pcie-fix-v2-1-6d74563b01d5@linux.spacemit.com>
> In RC mode, the K1 PERST# pad input also affects the local controller.
> Without PCIE_IGNORE_PERSTN set, asserting PERST# to reset the endpoint
> also resets the RC, losing previously programmed register values,
> including the vendor and device IDs.
>
> Set PCIE_IGNORE_PERSTN during RC initialization to prevent this
> feedback. Set it before the first DBI access, since PERST# may already
> be low when initialization starts, causing the access to hang.
>
> Fixes: ff64e078e45f ("PCI: spacemit: Add SpacemiT PCIe host driver")
> Reported-by: Bruno Banelli <bbanelli@gmail.com>
> Link: https://lore.kernel.org/all/20260825052249.66921-1-bbanelli@gmail.com/
> Signed-off-by: Encrow Thorne <encrow.thorne@linux.spacemit.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261106-spacemit-k1-pcie-fix-v2-1-6d74563b01d5@linux.spacemit.com?part=1
next prev parent reply other threads:[~2026-11-06 2:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-06 2:13 [PATCH v2] PCI: spacemit: Ignore PERST# input in RC mode on K1 Encrow Thorne
2026-11-06 2:16 ` sashiko-bot [this message]
2026-11-07 17:06 ` Manivannan Sadhasivam
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