From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) (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 C521428CF77 for ; Thu, 23 Apr 2026 12:07:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776946057; cv=none; b=aROIOi+ClcFbFDXXDAvMf8t6aJDFOwq6tT3+o0B96i2cXJxicxK7KJBMIYLQca9u+Ujc8J6haVZPeEtGTxtHmi29+e6PUZYDd5VAHTSlUZgJacUD0NOuLtGTz/v16z+/hKOkGcKZplABJJTtL5ps4m95AmBiy9c5Jy7EAPhtfps= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776946057; c=relaxed/simple; bh=NZkSPcRmjL/wS6NsoQeCkA1V04iVBP/f44bcm0vL/PE=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=noCHzX5wSYGATFHCrl3mUTwkGvWoKcu2ywMlg9B+RpJOwwW8j9f6Gi+DWK5R2gaKRXdUaRFWLoJeno1uGVQnJOyeT17OeoRCJRtWv0HkGJXO+S5c4aliez+Y6DwD8L1Y+lYJLUn9i2h4wrfWXp0pkTzwEshFz+/FZAuKYy3+Da8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=lOD8dZ98; arc=none smtp.client-ip=198.175.65.19 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=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="lOD8dZ98" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1776946056; x=1808482056; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version; bh=NZkSPcRmjL/wS6NsoQeCkA1V04iVBP/f44bcm0vL/PE=; b=lOD8dZ98g4+8RAxhq0q1nB5E47eT/Y5tciDocXjf8+sriiNtOaK7vX3s tlKyB+NHCDtcEI56OPqNW9tuDcd39jeFoPXl6ffNhHAdRQTUgDcnDGK2q pE8UBEZNXpqBEcXApO59aNHGlOM/QIkllCJrqgtZIF8CL2Jd1nWGu0scG 5nsmLzUolefc3F6HtzHkGGD22xg0CS13LpZQOVzN93W6e8wpADOiaNXFv aCKF6UrmD5ZsYvj60fWbdMp3wsfk5ufK4/7eSaz6TqZpgYkAfWBmxX1Oh SeT86sv7pvkizFLgi2hWKqB7G5v6iwX6osJyCgLpaKuYdKGLBwxzznADb Q==; X-CSE-ConnectionGUID: H2mVyToXSHCx+wOWL3axOg== X-CSE-MsgGUID: hbHaG87STlKfjVVxAr6XMw== X-IronPort-AV: E=McAfee;i="6800,10657,11764"; a="77824248" X-IronPort-AV: E=Sophos;i="6.23,194,1770624000"; d="scan'208";a="77824248" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Apr 2026 05:07:35 -0700 X-CSE-ConnectionGUID: SWrObGlTRYKZpSy+vvB4Qg== X-CSE-MsgGUID: v/6bw2eISui+45LyUBXJeA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,194,1770624000"; d="scan'208";a="232949259" Received: from fpallare-mobl4.ger.corp.intel.com (HELO localhost) ([10.245.244.220]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Apr 2026 05:07:31 -0700 From: Jani Nikula To: Maxime Ripard Cc: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Jyri Sarha , Tomi Valkeinen , Devarsh Thakkar , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Laurent Pinchart Subject: Re: [PATCH v2 00/28] drm: Implement state readout support In-Reply-To: <20260423-wealthy-moth-of-youth-0858a5@houat> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs Bertel Jungin Aukio 5, 02600 Espoo, Finland References: <20260423-drm-state-readout-v2-0-6cde1a9910ed@kernel.org> <28caaa3e416c13af6745fedb213dc6eed29feb46@intel.com> <20260423-wealthy-moth-of-youth-0858a5@houat> Date: Thu, 23 Apr 2026 15:07:27 +0300 Message-ID: <5a8491c0e403eebba06b3edc7c297abaa054e29d@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Thu, 23 Apr 2026, Maxime Ripard wrote: > Hi Jani, > > On Thu, Apr 23, 2026 at 01:50:59PM +0300, Jani Nikula wrote: >> On Thu, 23 Apr 2026, Maxime Ripard wrote: >> > Here's a series that implement what i915 calls "fastboot", ie, >> > initializing the initial KMS state from the hardware state at boot, to >> > skip the first modeset if the firmware already set up the display. >> >> FWIW, in i915 we also use the state readout for atomic commit >> verification. Write software state to hardware, read hardware state >> back, compare with the original state, complain if there's a difference. > > I know, and this series implement it as well. Is there anything you > wanted to point out in particular? Oh, I didn't get that far, obviously. Just wanted to mention the feature is not only about fastboot. Sorry for the noise. BR, Jani. -- Jani Nikula, Intel