linux-kernel - Re: [PATCH v8] i2c: designware: fix master is holding SCL low while ENABLE bit is disabled

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Message-ID: <a2de8e23-d2a0-4585-8b51-2144801eeff8@linux.intel.com>
Date: Tue, 10 Sep 2024 14:20:06 +0300
From: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
To: Liu Kimriver/刘金河 <kimriver.liu@...ngine.com>,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: "mika.westerberg@...ux.intel.com" <mika.westerberg@...ux.intel.com>,
 "jsd@...ihalf.com" <jsd@...ihalf.com>,
 "andi.shyti@...nel.org" <andi.shyti@...nel.org>,
 "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8] i2c: designware: fix master is holding SCL low while
 ENABLE bit is disabled

On 9/10/24 12:38 PM, Liu Kimriver/刘金河 wrote:
> Hi Andy,
> 
>> -----Original Message-----
>> From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>> Sent: 2024年9月10日 17:03
>> To: Liu Kimriver/刘金河 <kimriver.liu@...ngine.com>
>> Cc: jarkko.nikula@...ux.intel.com; mika.westerberg@...ux.intel.com; jsd@...ihalf.com; andi.shyti@...nel.org; linux-i2c@...r.kernel.org; linux-kernel@...r.kernel.org
>> Subject: Re: [PATCH v8] i2c: designware: fix master is holding SCL low while ENABLE bit is disabled
> 
>> On Tue, Sep 10, 2024 at 02:13:09PM +0800, Kimriver Liu wrote:
>>> It was observed issuing ABORT bit(IC_ENABLE[1]) will not work when
>>
>> "...observed that issuing..."
>> ...bit (..."
> 
> 
>>> IC_ENABLE is already disabled.
>>>
>>> Check if ENABLE bit(IC_ENABLE[0]) is disabled when the master is
> 
>> "...bit (..."
>> master --> controller
> 
>   Update it in V9
> 
Please add back also kernel errors that are shown when the issue occurs. 
I saw those mentioned in the commit log in some earlier version of the 
patch.

Those may help googling the solution (i.e. this patch) if somebody sees 
similar error on their HW.