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From: Andi Shyti <andi.shyti@kernel.org>
To: Hongbo Yao <andy.xu@hj-micro.com>
Cc: mika.westerberg@linux.intel.com,
	andriy.shevchenko@linux.intel.com,  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: Fri, 28 Aug 2026 02:39:56 +0200	[thread overview]
Message-ID: <apDYuknPDkSe9wqy@zenone.zhora.eu> (raw)
In-Reply-To: <20260826070547.268672-1-andy.xu@hj-micro.com>

Hi Hongbo,

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>

merged to i2c/i2c-fixes.

Thanks,
Andi

      parent reply	other threads:[~2026-08-28  0:39 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
2026-08-28  0:39 ` Andi Shyti [this message]

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