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From: Wolfram Sang <wsa@kernel.org>
To: "Limonciello, Mario" <mario.limonciello@amd.com>
Cc: Benjamin Tissoires <btissoir@redhat.com>,
	Hans de Goede <hdegoede@redhat.com>,
	Andrea Ippolito <andrea.ippo@gmail.com>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Alex Hung <alex.hung@canonical.com>,
	Linux I2C <linux-i2c@vger.kernel.org>,
	"open list:HID CORE LAYER" <linux-input@vger.kernel.org>,
	Platform Driver <platform-driver-x86@vger.kernel.org>,
	"Shah, Nehal-bakulchandra" <Nehal-bakulchandra.Shah@amd.com>
Subject: Re: Touchpad stickiness on AMD laptops (was Dell Inspiron/XPS)
Date: Wed, 12 Jan 2022 09:33:10 +0100	[thread overview]
Message-ID: <Yd6SRl7sm8zS85Al@ninjato> (raw)
In-Reply-To: <5409e747-0c51-24e2-7ffa-7dd9c8a7aec7@amd.com>

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Hi Mario,

thanks for joining the discussion!

> 1) Systems returning SMBUS address 0xff
> 
> The address can be potentially be returned using port I/O or it can be done
> using MMIO.
> 
> There is already a thread in process to add support for MMIO, but last I
> heard it's waiting for review comments.
> 
> https://lore.kernel.org/all/20210715221828.244536-1-Terry.Bowman@amd.com/

This thread is under active discussion again.

> Now something else interesting - the SMBUS controller in these laptops often
> is listed in the ACPI tables on IRQ7 with a _HID of SMB0001.

IIRC tests done by Miroslav showed that interrupt 7 was used for
completing SMBus Block transfers and alike, but not for HostNotify. He
suspects this is wired via GPIO somehow.

Would be really cool if we can fix the bugzilla entry you mentioned as
well during all this!

Happy hacking,

   Wolfram


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  reply	other threads:[~2022-01-12  8:33 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAGhUXvBw4rzCQrqttyyS=Psxmhppk79c6fDoxPbV91jE7fO_9A@mail.gmail.com>
2021-08-27  6:57 ` Touchpad stickiness on Dell Inspiron/XPS Andrea Ippolito
2021-09-23  8:47   ` Andrea Ippolito
2021-09-23  9:00     ` Hans de Goede
2021-09-23  9:06       ` Andrea Ippolito
2022-01-06 13:14       ` Wolfram Sang
2022-01-11 10:34         ` Touchpad stickiness on AMD laptops (was Dell Inspiron/XPS) Hans de Goede
2022-01-11 11:13           ` Benjamin Tissoires
2022-01-11 23:15             ` Limonciello, Mario
2022-01-12  8:33               ` Wolfram Sang [this message]
2022-01-12 12:21                 ` Miroslav Bendík
2022-01-12 22:54                   ` Limonciello, Mario
2022-01-15  9:39                     ` Miroslav Bendík
2022-01-15 13:46                       ` Limonciello, Mario
2022-01-15 18:10                         ` Miroslav Bendík
2022-01-17  8:39                         ` Miroslav Bendík
2022-01-17  9:08                           ` Hans de Goede
2022-01-23 17:25                             ` Miroslav Bendík
2022-01-12 12:31                 ` Hans de Goede
2022-01-30 13:14               ` Miroslav Bendík
2022-02-06 18:13               ` Miroslav Bendík

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