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charset=UTF-8 Date: Thu, 05 Nov 2026 10:53:05 +0800 Message-Id: From: "Encrow Thorne" To: "Troy Mitchell" , "Encrow Thorne" , "Lorenzo Pieralisi" , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , "Manivannan Sadhasivam" , "Rob Herring" , "Bjorn Helgaas" , "Yixun Lan" Cc: , , , Subject: Re: [PATCH] PCI: spacemit: Ignore link partner PERST on K1 X-Mailer: aerc 0.22.0-0-gc2f86b7abde3 References: <20260924-spacemit-k1-pcie-fix-v1-1-002b5c1ba9fc@linux.spacemit.com> In-Reply-To: X-QQ-SENDSIZE: 520 Feedback-ID: esmtpsz:linux.spacemit.com:qybglogicsvrsz:qybglogicsvrsz3b-0 X-QQ-XMAILINFO: OVxgrqsLORmRqorTkuJKvGn06tCDXz/QWhYmxmB9XDSmlKYv+Ro0IKB6 HZpp3NjZy7ys73+jQrpPyCL/vA4h/LuBy7/fvZlNqNGquqG76Sjicf5JwMMyaedwuD/wHG2 /F7blEh6v+bBoZpqmvJlaSbFsz5qUOxherz10lPaYNfyW4wUuhR5jqyy7vhUl96CtjCTzYt tS8vAYAF8QS2B0iR7D4isZAZp7G3o8vLgxe8VutItplbcGjySNj910CkSUcL1j8nvdRJCRG D7x125ElwMe9QegU0++f9QXZ1M3YZMSaJ4FoJHTrYCcMy7/3uClUt9ao0wp/0Y0qMsKLsKM CvEIuq5fVi0jbFVI53sN+Cl3g1Un3urFE9X+/cqmB6dgjwEyKGpuSaGIpUW950ic+VZE3kA VcKXt9tb6XrCdad7q/KlMWIPJ+V+263StKLiFJerXmQ5fqZlqSfDOz119lrPpHvNtRl9hus mSY1rrKmHv3030SGBvFt5LE1QSbOXdITCRx2diC2NHde7Cqjh3UWqy80e3JaqjYLUbM0Iyk Gsf1uIOOUZmzMah2P8S7JJaMqy7v6VqFlR0RH5VyrbZgoIF8Sl7gEqtorEC9oLi0lksI0x8 sHqCV4nnC/jgI6GAym6TATUGWojJp6dj3rN4nXISfsb41ERYhOTigV4xaR6KV6qqDiXp699 OEUnty3DS4H30X22KOhjxMeTsiTQzPhi0ZZ562Kcqvr2ZX8KKIQMnfP7d6fX2VTW9lBqX1x yw4JTz4vaCy/FpUznLTsxwx/od1ClDNv2dzEdUaJt6E+QKbHK4xF+CAdzUwP+FshddH+x/8 icjJesqvjvMxwG3xVl1DpPBYYM3Ss2OuX+IG0+bEoGe9vXzkL7WubK5VKCWj6+0P1VYgbib uhesW+qBN7VI7D7sCo+H/Bjwyp1oUNGaKc75lJpRs2w1k5YYC3BxIteGfJz877UyJEJh1uc kJ0ZbYU0adrs9OGbvqdGSxBdFdSXn/BJPpheKDKWzfRrb7X2xaHnMJx26O9aKgXvLX6xE9G IWa8dcs/MTzh4fkCxhDSS4V0ano8n7wLN2IZJfJg== X-QQ-XMRINFO: OD9hHCdaPRBwH5bRRRw8tsiH4UAatJqXfg== X-QQ-RECHKSPAM: 0 On Thu Sep 24, 2026 at 10:23 AM CST, Troy Mitchell wrote: > On Thu Sep 24, 2026 at 10:04 AM +08, Encrow Thorne wrote: >> The K1 PCIe controller and PHY are affected by the PERST signal from >> the link partner during initialization. With some devices connected, >> this can prevent host initialization from progressing and cause the >> system to hang while probing the PCIe controller. >> >> Set PCIE_IGNORE_PERSTN before accessing the DBI registers. When set, >> this bit makes both the PCIe controller and PHY ignore the PERST >> signal from the link partner. >> >> This allows host initialization to complete without being affected by >> the link partner's PERST state. >> >> Signed-off-by: Encrow Thorne > Fix tag and reported-by tag [1]? > > Link: https://lore.kernel.org/all/20260825052249.66921-1-bbanelli@gmail.c= om/ [1] Thanks, I will add it in the next version.