linux-kernel - Aw: Re: [next v7 8/8] arm64: dts: mt7986: add Bananapi R3

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Date:   Tue, 27 Dec 2022 11:29:38 +0100
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     Frank Wunderlich <frank-w@...lic-files.de>
Cc:     Daniel Golle <daniel@...rotopia.org>,
        Frank Wunderlich <linux@...web.de>,
        linux-mediatek@...ts.infradead.org,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org,
        Jianjun Wang <jianjun.wang@...iatek.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Vinod Koul <vkoul@...nel.org>, linux-usb@...r.kernel.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        devicetree@...r.kernel.org
Subject: Aw: Re: [next v7 8/8] arm64: dts: mt7986: add Bananapi R3

looks like i've found it:

when reverting these 2 (latter alone was not enough and seems not fixing the timeout as shown in my trace)

Revert "spi: mediatek: Enable irq when pdata is ready"  (HEAD -> 6.2-rc)
Revert "spi: spi-mtk-nor: Add recovery mechanism for dma read timeout"

so this breaks spi on mt7986:

c6f7874687f7 2022-11-28 spi: mediatek: Enable irq when pdata is ready

have sent bug-report to mailinglist and author/reviewer/maintainer...

regards Frank


> Gesendet: Dienstag, 27. Dezember 2022 um 10:43 Uhr
> Von: "Frank Wunderlich" <frank-w@...lic-files.de>
>
> at first look it seems it is needed...as i get this trace with 6.2:
>
> [    2.145931] pc : mtk_spi_can_dma+0x0/0x34
> [    2.155212] lr : mtk_spi_interrupt+0x74/0x360
>
> [    2.091801] mtk-spi 1100a000.spi: spi-mem transfer timeout
> [    2.097310] spi-nor: probe of spi0.0 failed with error -110
> [    2.102930] Unable to handle kernel read from unreadable memory at virtual address 0000000000000010
>
> but i get the same trace when reverting the cs-gpios change....seems something is broken in 6.2-rc1
>
> 6.1 works without the bogus cs-gpios (and the mt7531 interrupt-change)...
>
> have tried reverting this commit, but it does not fix the issue:
>
> 8330e9e8269b 2022-12-07 spi: spi-mtk-nor: Add recovery mechanism for dma read timeout