From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794395742; b=qSePmpG+/jIJ9KwdnaVv6kyolZEdxbK6bSM4nGR9hq+/WPzIQ9vGP/U/DFzpyv8esbpj iHjDYYYf4B3ZbajieSRS0z4jgDLSiBQ9g4gQQdT3aXm0iPtn2yQ3AEjrl1d5GOaStaUgv Pjt+dZ5ST/IgGYYbBzxED3WyZPkdlPBfhJ/oM8JANJZtIOYTEx2r8vviBf4yXoEBWSZfk 9QwHqyb0UsL0IzA3G1kM/vUXqEpHDZW03dLauDmYUe+TiHaUpeSa0hAq2Hh3WQudpe9A9 vr4guDr6BBR2TuSWr4rNE+0BCT5tK1ngUh2qCOXDAZF+ZercxwEYbzS6QHKyN/rsedw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794395742; h=Received:DKIM-Signature:Message-ID:Date:MIME-Version:User-Agent: Subject:To:Cc:References:From:Content-Language:In-Reply-To: Content-Type:Content-Transfer-Encoding; bh=6Digdi0J69cdmnfNAOroK/JVKXGvxIlZsj5otBtYtXY=; b=hp0fZYNc9Rj5HimAJQMwK9sP3+Ek9LpMjTvhux/kAfdqw97Nx0+AN6N4PEtjdtfhMWC8 ZxvHmcUBctxaEnGEUDFHZr1K43Q4AeSelM3zk9phRw3lGr44/sHZdWStuYRwM+3+HOUa0 qB/vTbCBSMUSBgYwNOvM6ihKgH1sfGc60lPMXiWBCpx35G7wZHe6bwVyqoNJIee0geQ2b f3lGYOS/soQqeZ1IkwR2kLVPQ5WYL9cJilx1LcEA8Uza+IH4kBAioPgrrzsFTm6e9FQ1l 68n9pQFfs8FbtibabnUylaJrhvjieI4lb51yUYTZbg9v1duo5Umwe2PLuGRWpRzi90g== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=AIe5oxYF; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0E3CD606A326; Wed, 11 Nov 2026 11:15:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=AIe5oxYF Received: by smtp.kernel.org (Postfix) with ESMTPSA id E91D21F00A06; Wed, 11 Nov 2026 11:15:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794395741; bh=6Digdi0J69cdmnfNAOroK/JVKXGvxIlZsj5otBtYtXY=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=AIe5oxYF2M19g+llfNnhDDGdQRy3FrvfWXZvepwbD96kg94cj31gHfc/mQkehNC39 u1qedVzZq7ryZrxNj86XQJf1e/FOmy5/uZskKNAc3QwrY3aiLTr8mLzAgQ2guvRVpe jGRMILKY0Qp5ShY8tiHwHmLDN0+o7sV5xrHlVdlFogIkeQfsO2668xHmt+yG6pU/fF rti6Eyg4YJ1NbBhKwZwWFow7ZPOsjYjv9MLLFH0A5C66NLj2Or28ANMMmIZprER9ZH u/57iG8h8ael69x1YzsGCp7zOzC1sxC5bH0JYMfbixAXhAnoEM+Q4P/CNadv1GVOJu 7ttqE+zpUltEQ== Message-ID: Date: Wed, 11 Nov 2026 12:15:36 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/2] Add monochrome framebuffer support to simple-framebuffer To: Sebastian Raase Cc: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Helge Deller References: From: Hans de Goede Content-Language: en-US, nl In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Sebastian, On 4-Nov-26 03:34, Sebastian Raase wrote: > This patch series adds support for monochrome framebuffers (1 bpp, packed-pixel) > to simple-framebuffer. > > Monochrome framebuffers require far less video memory and bandwidth than > 16bpp or 32bpp framebuffers, making them useful for small devices or FPGA > implementations. Thank you for your patch-series and I see that Helge has just applied this to the fbdev tree. Have you considered also extending the simpledrm driver to also support these monochrome formats there ? Most Linux distributions now a days have switched from using simplefb to using simpledrm. But I must admit I've no idea how well the drm subsys / kernel-mode- setting API handles monochrome formats. Regards, Hans