From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout-p-201.mailbox.org (mout-p-201.mailbox.org [80.241.56.171]) (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 D99D8270EAB for ; Wed, 28 Jan 2026 14:26:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769610362; cv=none; b=pCV9+xksQFYxU2cQWTHTrbpy0UD/0HklvApZ+0+N3KVRvZyIKF2J3E+Zi6tEF1AJmHxdwiSAd7DS7OdbeR/bEuS3auofzLC6FIzAsCdEv7O1+vAb1CHGY78MA2T0m0o4Wi77o6gc+wu92IlrGB56HOeC/64yixn/+rqPWGI7nWM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769610362; c=relaxed/simple; bh=zvN/vH20U+bQKXxU8/19Wz1nJCwNhBmPW/e34hHz8hg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=lBwH+8rVbp2Unbe+4X27ndmvrRQBpFBTJy79cUmCwtCSI9zCmwpxplzo8OGwu5T4oCNlop8lvrGG2ujCQy0lHeebhKy06vvRfgl6OXz6VEjhWfkkhRsXFhzkIOxsxm7x1Hab2s/t4uefNN/ElB/G1KxJWchXF9yh+ey8bDDRrN8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org; spf=pass smtp.mailfrom=mailbox.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=ZzxDUukM; arc=none smtp.client-ip=80.241.56.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mailbox.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="ZzxDUukM" Received: from smtp2.mailbox.org (smtp2.mailbox.org [10.196.197.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-201.mailbox.org (Postfix) with ESMTPS id 4f1PhN5tj1z9tgl; Wed, 28 Jan 2026 15:25:56 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1769610356; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=N0KtvZAiq279HnErsKYQgcwSwzbk4w29Y1YUwEgWny8=; b=ZzxDUukMaT/EbRAEIPsnHYwOz9yDynRwR1aftvVUZ1reJv55G2u4QqSKms5a/rJHVh/p2t AhjgG8PorgdxneTZ4Rmo+6iv5Y1sTdZVPv9gNg5vhvhYFh2EEPYrGdAlGQyMDxM7TiVfGA TFZaPjfZXsnpOyZBm1K++Y5FmyU99uTrrBhYFnzbt4Fgso5vg6dlXYcScIEvK7ZMgtlCo2 sjCV7ImySbt2v2SKQ1Y4Mq2qvKL0bXuQHETXEIlJP+dM4TWFPkinTZc19yTeHhkY98gg8Q QqKCW/TjrQXxvdS+N2FQLpKGiO9lCXZ80hBt1ZW+Ha3xLgMTsN1MV5J91bwWzg== Message-ID: <15d1d986-e9cf-48fb-be4e-b2c33974dffc@mailbox.org> Date: Wed, 28 Jan 2026 15:25:49 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [PATCH 1/2] drm: introduce page_flip_timeout() To: =?UTF-8?Q?Christian_K=C3=B6nig?= , =?UTF-8?Q?Timur_Krist=C3=B3f?= , Hamza Mahfooz , dri-devel@lists.freedesktop.org Cc: Alex Deucher , David Airlie , Simona Vetter , Harry Wentland , Leo Li , Rodrigo Siqueira , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Sunil Khatri , Ce Sun , Lijo Lazar , Kenneth Feng , Ivan Lipski , Alex Hung , Tom Chung , Melissa Wen , Fangzhi Zuo , amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, Mario Limonciello References: <20260123000537.2450496-1-someguy@effective-light.com> <79ed136a-cedd-4e97-adb8-bc3f4f2b8bb4@mailbox.org> <601b38b5-1890-48f9-adf9-54fb85650852@amd.com> <5173841.OV4Wx5bFTl@timur-max> From: =?UTF-8?Q?Michel_D=C3=A4nzer?= Content-Language: en-CA In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-MBO-RS-ID: bf72866054627a691d2 X-MBO-RS-META: q93up3dt83qansi51w3cy3495qcbbxdn On 1/28/26 12:25, Christian König wrote: > On 1/28/26 10:19, Timur Kristóf wrote: >> On 2026. január 26., hétfő 14:00:59 közép-európai téli idő Christian König >> wrote: >>> On 1/26/26 11:27, Michel Dänzer wrote: >>>> On 1/26/26 11:14, Christian König wrote: >>>>> >>>>> But looking at the slide Harry actually pointed out what immediately came >>>>> to my mind as well, e.g. that the Compositor needs to issue a full >>>>> modeset to re-program the CRTC.> >>>> In principle, the kernel driver has all the information it needs to >>>> reprogram the HW by itself. Not sure why the compositor would need to be >>>> actively involved. >>> >>> [...] >>> >>> Then second even if the kernel can do it I'm not sure if it should do it. >>> >>> [...] >> >> I agree with Michel here. It's a kernel bug, it should be solved by the >> kernel. I don't like the tendency of pushing userspace to handle kernel bugs, >> especially if this is just needed for one vendor's buggy driver. (No offence.) > > Well I strongly disagree. The kernel is not here to serve userspace, [...] Can't say I agree with that statement. Anyway, user space certainly isn't here to kick the kernel back into gear after it hit a bug, or to tell it things it already knows. -- Earthling Michel Dänzer \ GNOME / Xwayland / Mesa developer https://redhat.com \ Libre software enthusiast