From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (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 50DC043BDD1 for ; Wed, 22 Jul 2026 15:39:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784734794; cv=none; b=p5b4ENqXVuA5R2nJ+B7BUMnl7Bpr3sQkzSGgTy6YX+ToIItIFk+EcvPjz4yhWOptBXNel+YeQNMq2Vk6VB0+7zPDErX/T6eYiSBL1cTjW5XROME9nNw4bHTbO1eE1AAMxtgH7upbZMSI2FFdG2Uvk49etzKtm5+0gz0stkXdOaE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784734794; c=relaxed/simple; bh=MhKFFxEILfkLL758d1OFmp2CmiDyupXEyBRX9gmnzRU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Z0kOzfjRnef/6F6bUYNAEK1CyDjzSp2l+lNYg5Q20juVlYcOH10AbDDyoCR0A3r8nfaiWuw/xe4n5RGwe1BRV8qv+diN2oSvy4slpmeeiKO1rzSPGc6IR82OxyapZ5g5tsItMVnSrv13qWvLTAmaz4JpsVT5M+d5bF39SXy9UtQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=F5XaB3yy; arc=none smtp.client-ip=185.246.85.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="F5XaB3yy" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id 7D6F74E40ED4; Wed, 22 Jul 2026 15:39:49 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 2B03660388; Wed, 22 Jul 2026 15:39:49 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 5779F11BD3A6A; Wed, 22 Jul 2026 17:39:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1784734788; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:content-language:in-reply-to:references; bh=KbMT1xKJyvVket846AeElH+XsOTyxdJ88sqL2onR9EA=; b=F5XaB3yyctgUjCnzQg9FBssZ9VUE7lwKsEfXyXJ5CY8n3cA7OWrO/+S6Pm3La5CNU2g5FF Q2hYCD+urm1C3uD44RxMXjlYL61gB2rdQKhKdcIgMN12XutZMfZrsZfI74bADcgn/vLBYG 4Ft2bck/l57Qsr0SedR6KWEvtA0RX/iE+2C1oJkyQsr0lWQDyV69IxDOlTj7+cwpfCumqh c2imvYTcc1AC9GWjZZh6JRi13grkcqqhwxJREEvaRtB47af0yw3h2So96xeY6Aw84Zz0gG vkjXTF0Q3B1K1Fb47eyJlv5xEQuHIYwzpCW5ws2dnZeiAjafwEJQTgOBk1AScA== Message-ID: Date: Wed, 22 Jul 2026 17:39:44 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] [PATCH] drm/vkms: Advertise PREMULTI blend mode To: Michail Tatas , simona@ffwll.ch, melissa.srw@gmail.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, hamohammed.sa@gmail.com, maarten.lankhorst@linux.intel.com Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: From: Louis Chauvet Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 On 7/20/26 02:17, Michail Tatas wrote: > Since we only support pre-multiplied alpha blend mode, > advertise that, otherwise validate_blend_mode_for_alpha_formats() > will throw a WARN. > > Reported-by: syzbot+6245cb95ae707991bffa@syzkaller.appspotmail.com > Signed-off-by: Michail Tatas Reviewed-by: Louis Chauvet > --- > > syzbot link: https://syzkaller.appspot.com/bug?extid=6245cb95ae707991bffa > > drivers/gpu/drm/vkms/vkms_plane.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c > index 68cb2a3335e6..a2e5ebee729a 100644 > --- a/drivers/gpu/drm/vkms/vkms_plane.c > +++ b/drivers/gpu/drm/vkms/vkms_plane.c > @@ -246,6 +246,12 @@ struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, > DRM_COLOR_YCBCR_BT601, > DRM_COLOR_YCBCR_FULL_RANGE); > > + /* Since our composer only supports pre-multiplied alpha, > + * advertise only the PREMULTI blend mode. > + */ > + drm_plane_create_blend_mode_property(&plane->base, > + BIT(DRM_MODE_BLEND_PREMULTI)); > + > if (vkms_config_plane_get_default_pipeline(plane_cfg)) > vkms_initialize_colorops(&plane->base); >