From: Andy Pont <andy.pont@wonksw.tech>
To: "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>
Subject: Timeout with USB-C video adapter
Date: Wed, 24 Apr 2024 12:51:19 +0000 [thread overview]
Message-ID: <em32687794-85ba-4ce2-98ce-16af8fe460d1@04c694f6.com> (raw)
Hello,
I’m working on the coreboot port for a laptop which uses the N200
(AlderLake-N). The built in LCD and HDMI port are working correctly but
I am having problems with driving an external display over USB.
The Linux kernel (6.5.0-27-generic in Ubuntu 23.10) gives a message that
says:
i915 0000:00:02.0: [drm] *ERROR* Timeout waiting for DDI BUF D to get
active
The timeout occurs in hsw_wait_for_power_well_enable(). I have put the
full dmesg output of the drm_WARN_ON() messages on Pastebin[1].
I’m guessing something in the FSP isn’t being correctly configured but I
don’t know whether it is graphics, USB, or power related.
Thanks in advance for any advice on where to look.
-Andy.
1. https://pastebin.com/p3JTYpTC
next reply other threads:[~2024-04-24 12:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-24 12:51 Andy Pont [this message]
2024-04-24 14:12 ` Timeout with USB-C video adapter Jani Nikula
2024-04-24 15:11 ` Andy Pont
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