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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i9si4534224eda.35.2022.02.17.11.37.18; Thu, 17 Feb 2022 11:37:42 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@emersion.fr header.s=protonmail2 header.b=X+i20R5g; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=emersion.fr Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239036AbiBQKLz (ORCPT + 99 others); Thu, 17 Feb 2022 05:11:55 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:49738 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239035AbiBQKLx (ORCPT ); Thu, 17 Feb 2022 05:11:53 -0500 Received: from mail-4323.proton.ch (mail-4323.proton.ch [185.70.43.23]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D3DB2721 for ; Thu, 17 Feb 2022 02:11:35 -0800 (PST) Date: Thu, 17 Feb 2022 10:11:32 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=emersion.fr; s=protonmail2; t=1645092693; bh=T6IpIe0qlak/CRlarOD0jKHaYw0xSiHQu/HYNWx/KyM=; h=Date:To:From:Cc:Reply-To:Subject:Message-ID:In-Reply-To: References:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID; b=X+i20R5g6ti2hqmOoTzHcZag2oMG6wacA4IM9NAmsxM5gAbqBGJ0BrYEbJph2fNVv IP8F8DcPWOwL7kEgFlhn+Kd+zeXnREUhjPdBVoUn5j/9atEZSyStWGvQSY8HNGduWK zfTEw9aL7rd4112wrmpdNluANJjyHnbYKXP88qLlmsY2DUq2UQzQsZgPO4Zg61RbNe 4cAOJFyW8sSm/47UyeQJ0qvFIlWqIwSIWzPP7cSukV9lAuQybM65SOFY8U+PR71Cq/ tBuXy/ouPvAS2QntjYR6DKM8ciJEMErzpOV25DhhZEPD9cor+Pg+TJUzLjmIW8bXlZ ZNQ1fXHRqlaYQ== To: Geert Uytterhoeven From: Simon Ser Cc: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Helge Deller , Javier Martinez Canillas , linux-fbdev@vger.kernel.org, linux-m68k@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Reply-To: Simon Ser Subject: Re: [PATCH 8/8] drm/fourcc: Add DRM_FORMAT_D1 Message-ID: In-Reply-To: <20220215165226.2738568-9-geert@linux-m68k.org> References: <20220215165226.2738568-1-geert@linux-m68k.org> <20220215165226.2738568-9-geert@linux-m68k.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Tuesday, February 15th, 2022 at 17:52, Geert Uytterhoeven wrote: > Introduce a fourcc code for a single-channel frame buffer format with two > darkness levels. This can be used for two-level dark-on-light displays. The previous patches introduce C1 and R1. Do we really need D1? Can't we just use R1 instead? Simon