From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B0DB92599 for ; Mon, 9 Jan 2023 09:14:50 +0000 (UTC) Received: from [2a02:8108:963f:de38:eca4:7d19:f9a2:22c5]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1pEoEo-00030V-8i; Mon, 09 Jan 2023 10:14:38 +0100 Message-ID: Date: Mon, 9 Jan 2023 10:14:37 +0100 Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.6.0 Content-Language: en-US, de-DE From: "Linux kernel regression tracking (Thorsten Leemhuis)" To: =?UTF-8?Q?Filipe_La=c3=adns?= , Benjamin Tissoires , Bastien Nocera Cc: Jiri Kosina , "open list:HID CORE LAYER" , LKML , berilko@gmail.com, =?UTF-8?Q?Stefan_Br=c3=bcns?= , "regressions@lists.linux.dev" Reply-To: Linux regressions mailing list Subject: =?UTF-8?Q?=5bRegression=5d_Bug=c2=a0216903_-_HiRes_Scroll_for_Perfo?= =?UTF-8?Q?rmance_Mouse_MX_broken_in_6=2e1?= Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1673255690;096cc6bc; X-HE-SMSGID: 1pEoEo-00030V-8i Hi, this is your Linux kernel regression tracker. I noticed a regression report in bugzilla.kernel.org. As many (most?) kernel developer don't keep an eye on it, I decided to forward it by mail. Quoting from https://bugzilla.kernel.org/show_bug.cgi?id=216903 : > berilko@gmail.com 2023-01-08 19:14:21 UTC > > Since 6.1 Kernel driver for hid-logitech-hidpp no more detect Performance MX as FastScroll > > Self-made patch is: > --- archlinux-linux/drivers/hid/hid-logitech-hidpp.c 2023-01-09 00:41:25.310773805 +0700 > +++ archlinux-linux/drivers/hid/hid-logitech-hidpp.c 2023-01-09 01:09:10.844967608 +0700 > @@ -3479,7 +3479,7 @@ > HIDPP_GET_REGISTER, > HIDPP_ENABLE_FAST_SCROLL, > NULL, 0, &response); > - if (!ret) { > + if (!ret || /* Patch for Performance MX */ hidpp->hid_dev->product == 0x101a) { > hidpp->capabilities |= HIDPP_CAPABILITY_HIDPP10_FAST_SCROLL; > hid_dbg(hidpp->hid_dev, "Detected HID++ 1.0 fast scroll\n"); > } > > [reply] [−] Comment 1 Stefan Brüns 2023-01-08 23:39:50 UTC > > Unfortunately, the hires auto detection is broken for HID++1.0 devices. > > https://elixir.bootlin.com/linux/latest/source/drivers/hid/hid-logitech-hidpp.c#L3477 > > ``` > ret = hidpp_send_rap_command_sync(hidpp, > REPORT_ID_HIDPP_SHORT, > HIDPP_GET_REGISTER, > HIDPP_ENABLE_FAST_SCROLL, > NULL, 0, &response); > ``` > > This command tries to read from register 0x40, while the FAST_SCROLL feature is BIT(6) (0x40) in register 0x01. > > For my M705, enabling and disabling of FAST_SCROLL is possible (writing 0x42/0x02 to register 0x1), and the current setting can be read back. > > I don't think auto-detection is possible for HID++1.0 devices. > See the ticket for more details. BTW, let me use this mail to also add the report to the list of tracked regressions to ensure it's doesn't fall through the cracks: #regzbot introduced: v6.0..v6.1 https://bugzilla.kernel.org/show_bug.cgi?id=216903 #regzbot title: hid: HiRes Scroll for Performance Mouse MX broken #regzbot ignore-activity Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr If I did something stupid, please tell me, as explained on that page.