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From: Maxime Ripard <maxime@cerno.tech>
To: Michael Stapelberg <michael@stapelberg.ch>
Cc: dri-devel@lists.freedesktop.org, torvalds@linux-foundation.org,
	felix.kuehling@amd.com, Dave Airlie <airlied@gmail.com>
Subject: Re: [git pull] drm for 5.14-rc1
Date: Mon, 20 Sep 2021 10:55:31 +0200	[thread overview]
Message-ID: <20210920085531.jd4r2kvva6jxyzd2@gilmour> (raw)
In-Reply-To: <871r5mp7h2.fsf@midna.i-did-not-set--mail-host-address--so-tickle-me>

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Hi,

On Sat, Sep 18, 2021 at 11:18:33AM +0200, Michael Stapelberg wrote:
> torvalds at linux-foundation.org (Linus Torvalds) writes:
> > Did I fix it up correctly? Who knows. The code makes more sense to me
> > now and seems valid. But I really *really* want to stress how locking
> > is important.
> 
> As far as I can tell, this merge conflict resolution made my Raspberry
> Pi 3 hang on boot. You can find the full serial console output at:
> 
> https://t.zekjur.net/linux-5.14-raspberry-pi-3-hang-vc4.txt
> 
> The last few messages are from vc4, then the boot hangs.
> 
> Using git-bisect, I tracked this down to
> https://github.com/torvalds/linux/commit/e058a84bfddc42ba356a2316f2cf1141974625c9,
> which is the merge you’re talking about here, AFAICT.
> 
> I also tried the git://anongit.freedesktop.org/drm/drm, and that tree
> boots as expected, suggesting that the problem really is with the
> additional changes.
> 
> The code seems to work on my Raspberry Pi 4, just not on the Raspberry
> Pi 3. Any ideas why that might be, and how to fix it?

I assume you run your Pi without anything connected on HDMI, and without
hdmi_force_hotplug in your config.txt?

If so, can you test that branch, and let me know if it works for you
https://github.com/mripard/linux/tree/rpi/bug-fixes

Maxime

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  parent reply	other threads:[~2021-09-20  8:55 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-01  4:34 [git pull] drm for 5.14-rc1 Dave Airlie
2021-07-01  4:34 ` Dave Airlie
2021-07-01 20:15 ` Linus Torvalds
2021-07-01 20:15   ` Linus Torvalds
2021-07-01 21:31   ` Felix Kuehling
2021-07-01 21:31     ` Felix Kuehling
2021-09-18  9:18   ` Michael Stapelberg
2021-09-18 10:09     ` Simon Ser
2021-09-18 19:24     ` Linus Torvalds
2021-09-18 20:13       ` Michael Stapelberg
2021-09-18 22:12         ` Linus Torvalds
2021-09-19  7:26           ` Michael Stapelberg
2021-09-18 22:00       ` Sudip Mukherjee
2021-09-18 22:15         ` Linus Torvalds
2021-09-18 22:47           ` Sudip Mukherjee
2021-09-18 23:06             ` Linus Torvalds
2021-09-19 11:05               ` Sudip Mukherjee
2021-09-19 17:19                 ` Linus Torvalds
2021-09-20 12:17                   ` Maxime Ripard
2021-09-20 12:50                     ` Sudip Mukherjee
2021-09-20 17:10                     ` Linus Torvalds
2021-09-20 17:32                       ` Maxime Ripard
2021-09-20 17:47                         ` Linus Torvalds
2021-09-22 11:54                           ` Maxime Ripard
2021-09-20  8:55     ` Maxime Ripard [this message]
2021-09-20 12:18       ` Maxime Ripard
2021-07-01 20:24 ` pr-tracker-bot
2021-07-01 20:24   ` pr-tracker-bot

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