From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Hongbo Yao <andy.xu@hj-micro.com>
Cc: andriy.shevchenko@linux.intel.com, andi.shyti@kernel.org,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
peter.du@hj-micro.com, gwilym.wu@hj-micro.com,
clarke.li@hj-micro.com
Subject: Re: [PATCH] i2c: designware: Enable interrupt mask workaround for HJMC3001
Date: Wed, 26 Aug 2026 12:12:57 +0200 [thread overview]
Message-ID: <20260826101257.GN893316@black.igk.intel.com> (raw)
In-Reply-To: <20260826070547.268672-1-andy.xu@hj-micro.com>
On Wed, Aug 26, 2026 at 03:05:47PM +0800, Hongbo Yao wrote:
> On HJMicro ARM64 servers, the DesignWare I2C controller does not
> retrigger a pending interrupt if the interrupt status changes after
> the current status bits have been cleared.
>
> The issue is exposed under heavy system load when the corresponding
> SPI is routed across sockets to a core in the remote socket. The
> interrupt is then lost and the I2C transfer times out.
>
> Enable ACCESS_INTR_MASK for HJMC3001. This toggles DW_IC_INTR_MASK
> before returning from the interrupt handler and retriggers any
> pending interrupt.
>
> Fixes: 6816ce57c479 ("i2c: designware: Add a new ACPI HID for HJMC01 I2C controller")
> Signed-off-by: Hongbo Yao <andy.xu@hj-micro.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
next prev parent reply other threads:[~2026-08-26 10:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-26 7:05 [PATCH] i2c: designware: Enable interrupt mask workaround for HJMC3001 Hongbo Yao
2026-08-26 10:12 ` Mika Westerberg [this message]
2026-08-28 0:39 ` Andi Shyti
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260826101257.GN893316@black.igk.intel.com \
--to=mika.westerberg@linux.intel.com \
--cc=andi.shyti@kernel.org \
--cc=andriy.shevchenko@linux.intel.com \
--cc=andy.xu@hj-micro.com \
--cc=clarke.li@hj-micro.com \
--cc=gwilym.wu@hj-micro.com \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=peter.du@hj-micro.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.