From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) (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 80C8243786A; Tue, 28 Jul 2026 12:34:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785242077; cv=none; b=KEbcMehqSkBM4T21UG0CxdMUkPfXIgYmjWV6kG+4zRxm5ykOLWFm6PWok1cZ1X8iMGV8GZIFzH7VWy15XUqtrDzBduqjgi4vPPAiCzkPkyZmW//DMVYgx0/ZjHmSYKanrezdXhuu7UuO4aW727Stb1JgehifirgaLZsQywWjYiU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785242077; c=relaxed/simple; bh=qS+ACjhQz5lnG+4tvxGsYp9mXLT1MtrxulXQHcyZeTk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TzbdkPou0XXFtS4rzR9fWMapa5KZOY6oo4BuAgnBjNdAwIS0qzBiP1WkMFBwUWHLIgwiWlVu13uGaBEQi6BkFwGZlYc0LbPOoDDk1XJKm9iHmVzH0os+2XsVo/VaSfzobtFZDQoVPaORjlXZS8lKNKawb2rAaTdNNObA9Fkcrl4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Ud8D75BO; arc=none smtp.client-ip=192.198.163.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass 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="Ud8D75BO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1785242075; x=1816778075; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=qS+ACjhQz5lnG+4tvxGsYp9mXLT1MtrxulXQHcyZeTk=; b=Ud8D75BOUwaSUd/UpBGJfWVPVgslnZIdSxgzDq1ddPC47s3nA787pREM uOtzZv03qy0atynGtjZ/flBucSjh77K9EnVEILM4tbcfUOhwjlCip2263 aI9EdR4TMjh3rTIMZE6vpUr5d/QUD66dfhdI3nu6T2sB6lsqGIy76qLar pbEDhstvpLoWBmpBAEJ6eg4EZtNSBoWvAdwuiq+Md8bTX/Qu3T4VV3xRa 8XkVCBIwO92L1/mDQdfjSoUcRoRdZxara4VavHiz+n5qj2IfpddJkc1qy K9Tg1MLQUbOYy6dy2Ghasc4mHNm9g8ilz5/iUjcbXcx3rOh1Je5z+J91T g==; X-CSE-ConnectionGUID: bWCMfUpjQTetE+6YCqDUcg== X-CSE-MsgGUID: di/EhyI7TxWUyC4l3orgLA== X-IronPort-AV: E=McAfee;i="6800,10657,11858"; a="96410985" X-IronPort-AV: E=Sophos;i="6.25,190,1779174000"; d="scan'208";a="96410985" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jul 2026 05:34:34 -0700 X-CSE-ConnectionGUID: kQgSw5xqSXmlmdy9NgUggw== X-CSE-MsgGUID: cTq5CH+1S26MjrH8uhhxZA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,190,1779174000"; d="scan'208";a="297922174" Received: from kniemiec-mobl1.ger.corp.intel.com (HELO kekkonen.fi.intel.com) ([10.245.244.69]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jul 2026 05:34:32 -0700 Received: from kekkonen.localdomain (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with SMTP id 9C00E121BFD; Tue, 28 Jul 2026 15:34:30 +0300 (EEST) Date: Tue, 28 Jul 2026 15:34:30 +0300 Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo From: Sakari Ailus To: Kate Hsuan Cc: Jai Luthra , Hans de Goede , Mauro Carvalho Chehab , Serin Yeh , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] media: i2c: imx471: Add line length PCK setting Message-ID: References: <20260728042013.23707-1-hpa@redhat.com> <178521646078.4139729.8353081240992310969@freya> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Hi Kate, On Tue, Jul 28, 2026 at 04:33:38PM +0800, Kate Hsuan wrote: > Good suggestion. I'll try to tune vblank and possible configs and hope it works. > I scratched my head trying to find the solutions and now I can focus > on tuning the parameter to fix the issue. Horizontal blanking is likely to affect image defects whereas vertical blanking can be used to adjust the frame rate. If changing the horizontal blanking does have that effect, we should probably think of using a fixed value for it. Then the question is what is that value and what does it depend on (likely PLL configuration and external clock frequency, possibly binning etc.). -- Regards, Sakari Ailus