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From:   Enric Balletbo Serra <eballetbo@gmail.com>
Date:   Mon, 17 Aug 2020 16:56:08 +0200
Message-ID: <CAFqH_510ykRd=79hUKbK5k8fqWzt=wri6=-Mv1zvV8inquPmPg@mail.gmail.com>
Subject: Re: [BUG] 5.9-rc1 broken bootup on mt7622/mt7623
To:     Frank Wunderlich <frank-w@public-files.de>
Cc:     linux-kernel <linux-kernel@vger.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@lists.infradead.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Ryder Lee <ryder.lee@mediatek.com>,
        Chunfeng Yun <chunfeng.yun@mediatek.com>,
        Sean Wang <sean.wang@mediatek.com>
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Hi Frank,

Missatge de Frank Wunderlich <frank-w@public-files.de> del dia dl., 17
d=E2=80=99ag. 2020 a les 16:48:
>
> Hi
>
> at least my Bananapi R2/R64 does not bootup (no output on serial console)=
 with 5.9-rc1
>
> made a bisect which points me to this commit:
>
> commit f97dbf48ca43009e8b8bcdf07f47fc9f06149b36
> Author: Saravana Kannan <saravanak@google.com>
> Date:   Fri Jul 17 17:06:36 2020 -0700
>
>     irqchip/mtk-sysirq: Convert to a platform driver
>
>     This driver can work as a platform driver. So covert it to a platform
>     driver.
>
>     Signed-off-by: Saravana Kannan <saravanak@google.com>
>     Signed-off-by: Marc Zyngier <maz@kernel.org>
>     Reviewed-by: Hanks Chen <hanks.chen@mediatek.com>
>     Link: https://lore.kernel.org/r/20200718000637.3632841-4-saravanak@go=
ogle.com
>

Looks like all Mediatek devices are broken, you should try if this [1]
fixes the issue for you. It fixes for me.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/c=
ommit/?h=3Dirq/irqchip-next&id=3D7828a3ef8646fb2e69ed45616c8453a037ca7867

Cheers,
 Enric

>  drivers/irqchip/irq-mtk-sysirq.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> at least on my devices i got 5.9 working by reverting the commit, will se=
nd a revert-Patch
>
> $ git bisect log
> git bisect start
> # bad: [d24b5abc4640b46bb356bb5371d244866a5fe0a3] gitignore: add from 5.8=
 + itb/mod
> git bisect bad d24b5abc4640b46bb356bb5371d244866a5fe0a3
> # good: [bcf876870b95592b52519ed4aafcf9d95999bc9c] Linux 5.8
> git bisect good bcf876870b95592b52519ed4aafcf9d95999bc9c
> # bad: [8186749621ed6b8fc42644c399e8c755a2b6f630] Merge tag 'drm-next-202=
0-08-06' of git://anongit.freedesktop.org/drm/drm
> git bisect bad 8186749621ed6b8fc42644c399e8c755a2b6f630
> # bad: [2324d50d051ec0f14a548e78554fb02513d6dcef] Merge tag 'docs-5.9' of=
 git://git.lwn.net/linux
> git bisect bad 2324d50d051ec0f14a548e78554fb02513d6dcef
> # good: [92c59e126b21fd212195358a0d296e787e444087] Merge tag 'arm-defconf=
ig-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
> git bisect good 92c59e126b21fd212195358a0d296e787e444087
> # good: [d4db4e553249eda9016fab2e363c26e52c47926f] Merge tag 'arm-newsoc-=
5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
> git bisect good d4db4e553249eda9016fab2e363c26e52c47926f
> # good: [fd76a74d940ae3d6b8b2395cd12914630c7e1739] Merge tag 'audit-pr-20=
200803' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
> git bisect good fd76a74d940ae3d6b8b2395cd12914630c7e1739
> # bad: [95ffa676583b23baed40861d30b65fe31397da00] Merge branch 'parisc-5.=
9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
> git bisect bad 95ffa676583b23baed40861d30b65fe31397da00
> # bad: [f8b036a7fc231fe6e8297daddee5dffdbbf2581f] Merge tag 'irq-core-202=
0-08-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
> git bisect bad f8b036a7fc231fe6e8297daddee5dffdbbf2581f
> # good: [4f30a60aa78410496e5ffe632a371c00f0d83a8d] Merge tag 'close-range=
-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
> git bisect good 4f30a60aa78410496e5ffe632a371c00f0d83a8d
> # good: [8d16f5b979660c0fdcfa21a418cc03f1fde60cf7] genirq: Export irq_chi=
p_retrigger_hierarchy and irq_chip_set_vcpu_affinity_parent
> git bisect good 8d16f5b979660c0fdcfa21a418cc03f1fde60cf7
> # bad: [c9c73a05413ea4a465cae1cb3593b01b190a233f] irqchip/loongson-lioint=
c: Fix misuse of gc->mask_cache
> git bisect bad c9c73a05413ea4a465cae1cb3593b01b190a233f
> # bad: [f97dbf48ca43009e8b8bcdf07f47fc9f06149b36] irqchip/mtk-sysirq: Con=
vert to a platform driver
> git bisect bad f97dbf48ca43009e8b8bcdf07f47fc9f06149b36
> # bad: [f97dbf48ca43009e8b8bcdf07f47fc9f06149b36] irqchip/mtk-sysirq: Con=
vert to a platform driver
> git bisect bad f97dbf48ca43009e8b8bcdf07f47fc9f06149b36 //needs change fr=
om 762a21fd45e0 as build-fix
> # good: [3af9571cd585efafc2facbd8dbd407317ff898cf] irqchip/gic-v4.1: Ensu=
re accessing the correct RD when writing INVALLR
> git bisect good 3af9571cd585efafc2facbd8dbd407317ff898cf
> # good: [f8410e626569324cfe831aaecc0504cafc12b471] irqchip: Add IRQCHIP_P=
LATFORM_DRIVER_BEGIN/END and IRQCHIP_MATCH helper macros
> git bisect good f8410e626569324cfe831aaecc0504cafc12b471
> # good: [5be57099d44550d2c4cf44a86c44df87edb79a57] irqchip/qcom-pdc: Swit=
ch to using IRQCHIP_PLATFORM_DRIVER helper macros
> git bisect good 5be57099d44550d2c4cf44a86c44df87edb79a57
> # first bad commit: [f97dbf48ca43009e8b8bcdf07f47fc9f06149b36] irqchip/mt=
k-sysirq: Convert to a platform driver
>
> regards Frank
>