From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 2A2513B9DBF; Mon, 16 Mar 2026 16:33:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773678838; cv=none; b=aeXdxsr7Jg/QhlStGTVVBCiJv8WIPwY45tsxQBdH1icn84HSb194pZ7RvJY1MzKIbOQnt1U1RZU9qYfHciw5SXlbRNBofhlYJ83+ssYatZ0OAY82egx+jhDW5zK+JnSMMSuAo8ZHonhpXOV7Z4fdBvNv/qmo4cdZpMK0BpDk13Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773678838; c=relaxed/simple; bh=ilztXb4L4lL5NjMNyaSUms4WUvTR31TNZ12rgzjdspE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=UDJ0SlX07oqeS5uHh9pX75N06Ss0beAQ6CtJ6fvexQ5pROyPflVLd3JrhrRZwoItfkGNgAo/aLs4A5jt4QaxI148MjgdvbSXU15vBf6hZEdaI3Z/ZhkuzsL7PnDLctg86xjjJV/mc7V4s2BPTy2ko9EirTC61CTEwk1opnAdHZA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=bTDXH024; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="bTDXH024" Received: from killaraus.ideasonboard.com (2001-14ba-703d-e500--2a1.rev.dnainternet.fi [IPv6:2001:14ba:703d:e500::2a1]) by perceval.ideasonboard.com (Postfix) with UTF8SMTPSA id 53054BD2; Mon, 16 Mar 2026 17:32:44 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1773678764; bh=ilztXb4L4lL5NjMNyaSUms4WUvTR31TNZ12rgzjdspE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=bTDXH024qh/2g4362810lLVTQHlYxS4V47UR5/grd9GNmHVk+p4FLWsi9fQM/oCX2 0PHlhrn87vpDT2Sz0D4FWhNqlqBa3/SM31dC7eU4vyW5yQm2aLwyGrls7Dgg2JCDr4 r3vkl2/SsugkJQY0hbnThRaBNfEEpAXKu94bfZBo= Date: Mon, 16 Mar 2026 18:33:54 +0200 From: Laurent Pinchart To: Maxime Ripard Cc: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Jonathan Corbet , Shuah Khan , Dmitry Baryshkov , Jyri Sarha , Tomi Valkeinen , Andrzej Hajda , Neil Armstrong , Robert Foss , Jonas Karlman , Jernej Skrabec , dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 09/14] drm/drv: Call drm_mode_config_create_state() by default Message-ID: <20260316163354.GN31604@killaraus.ideasonboard.com> References: <20260310-drm-mode-config-init-v1-0-de7397c8e1cf@kernel.org> <20260310-drm-mode-config-init-v1-9-de7397c8e1cf@kernel.org> Precedence: bulk X-Mailing-List: linux-doc@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: <20260310-drm-mode-config-init-v1-9-de7397c8e1cf@kernel.org> On Tue, Mar 10, 2026 at 05:07:01PM +0100, Maxime Ripard wrote: > Almost all drivers, and our documented skeleton, call > drm_mode_config_reset() prior to calling drm_dev_register() to > initialize its DRM object states. > > Now that we have drm_mode_config_create_state() to create that initial > state if it doesn't exist, we can call it directly in > drm_dev_register(). That way, we know that the initial atomic state will > always be allocated without any boilerplate. Should most drivers now stop calling drm_mode_config_reset() at probe time ? > Signed-off-by: Maxime Ripard > --- > drivers/gpu/drm/drm_drv.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c > index 2915118436ce8a6640cfb0c59936031990727ed1..820106d56ab399a39cac56d98662b5ddbcae8ded 100644 > --- a/drivers/gpu/drm/drm_drv.c > +++ b/drivers/gpu/drm/drm_drv.c > @@ -1097,10 +1097,14 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags) > > if (drm_core_check_feature(dev, DRIVER_MODESET)) { > ret = drm_modeset_register_all(dev); > if (ret) > goto err_unload; > + > + ret = drm_mode_config_create_state(dev); > + if (ret) > + goto err_unload; > } > drm_panic_register(dev); > drm_client_sysrq_register(dev); > > DRM_INFO("Initialized %s %d.%d.%d for %s on minor %d\n", -- Regards, Laurent Pinchart