From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) (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 530071BEF98; Mon, 13 Jan 2025 06:49:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.8 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736750993; cv=none; b=Cliubo70Jmor17spIfiW0XzzDGfNO7ONDtt9ExzTLW596yBULIcEoMazhX23imeBzloNuLK2z8nvODtLCErAEBwWWIMek0sXYv6tVvfJq7wMa4Q+YTCaS9v5KnqkqRuJgZnO3gQjQjt1t0Xj0/sghH2Y3yFeD8ghqconq90bNfc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736750993; c=relaxed/simple; bh=F+SfMDM2VOZL+bJiOkc8NnMfKOu7aPT59ixU8wv7xW4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KyE+sw1+T+fXKyqPxkgjQCQJGqEzbDUzU5bVAHZCVeOfqcuYT+qi8fUsMdQXThxGi353IgWWXebLIYDcJTKsrZ0v+nisAp/AfUMNynUJoexkDs/pZopdxGcE+4gB469Awhc2lrQSyP7BCGGqRBeEeRlZVN2q/M5oYoV/WF5Bs7o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=mFzyewL4; arc=none smtp.client-ip=192.198.163.8 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="mFzyewL4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1736750991; x=1768286991; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=F+SfMDM2VOZL+bJiOkc8NnMfKOu7aPT59ixU8wv7xW4=; b=mFzyewL4AAo2ShH3l+ReF+WZhUV0KohMUciQP796F8or4j+qIcuP3Wm/ v28jmrkSwcCPJ5QS+Wdi1RBrAKoh3FhV8SoZW78CXL0G9LZAbOtRzdVdz L6bzb59nS5lt3d1jcDUdGB9g8cLES9+isKHmz19GGSESM+WVcT1WdETeE YPfdCOiZw130ZD+RG8FvjdFQwu+kWUGoiZIs1nlsZcyBoDcGI5ombstJG PqiYhzxEeDRfTXYr4d4kwLVqI1Ca6Os9ZrXlgj21f42+9eI7qz1QmRv/v CShVYK4YBXyFMtO80wGCiwceSHPvCzc6lXEtXyDFOYM1CEperlIDYZpcP A==; X-CSE-ConnectionGUID: AbBepTLvQB6I8JsnsGCHqA== X-CSE-MsgGUID: T2UXXDK5Q+ehw8wLdheOQw== X-IronPort-AV: E=McAfee;i="6700,10204,11313"; a="54540419" X-IronPort-AV: E=Sophos;i="6.12,310,1728975600"; d="scan'208";a="54540419" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jan 2025 22:49:50 -0800 X-CSE-ConnectionGUID: j/LJdbITTnyaszCn04a3+Q== X-CSE-MsgGUID: ITW66524RgOi9cuop3oU4A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="109414535" Received: from black.fi.intel.com ([10.237.72.28]) by orviesa003.jf.intel.com with ESMTP; 12 Jan 2025 22:49:49 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id 71D45329; Mon, 13 Jan 2025 08:49:47 +0200 (EET) Date: Mon, 13 Jan 2025 08:49:47 +0200 From: Mika Westerberg To: R Ha Cc: Jarkko Nikula , wsa+renesas@sang-engineering.com, linux-i2c@vger.kernel.org, linux-acpi@vger.kernel.org, trivial@kernel.org Subject: Re: [PATCH 1/1] Force ELAN06FA touchpad I2C bus freq to 100KHz Message-ID: <20250113064947.GK3713119@black.fi.intel.com> References: <20250107072746.GW3713119@black.fi.intel.com> <20250108055150.GY3713119@black.fi.intel.com> <20250109111910.GD3713119@black.fi.intel.com> <20250110112623.GF3713119@black.fi.intel.com> <0151b609-98d9-402a-b553-c9af5b0eb51f@linux.intel.com> <20250110120740.GH3713119@black.fi.intel.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Sat, Jan 11, 2025 at 10:05:23AM -0600, R Ha wrote: > Hi, > > I updated the description, please let me know if it's covered everything. Thanks, I commented few things there. > Just as a question, because the touchpad works well at both 100KHz and > 1000KHz, is it better to force it to 100KHz or 1000KHz? I was > considering that the Microsoft docs [1] specified that the frequency > should be "no less than 400KHz", but didn't change it for now because > the touchpad feels the same at 100KHz and 1000KHz, including for > gestures. > > Is it possible that there will be any sort of compatibility issues if > the speed is set to 1000KHz? From what I can tell, the only other > device on I2C1 is the "Intel Smart Sound" related device, but I'm not > exactly sure what that does or whether it will work at 1000KHz. The > sound output itself seems to be unaffected regardless of the > frequency, though I don't think the other device is directly related > to sound output. I would say 100kHz is safer, all the devices should support it even the older ones.