From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33917CDB47E for ; Fri, 13 Oct 2023 20:03:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231636AbjJMUDH (ORCPT ); Fri, 13 Oct 2023 16:03:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231846AbjJMUDF (ORCPT ); Fri, 13 Oct 2023 16:03:05 -0400 Received: from jabberwock.ucw.cz (jabberwock.ucw.cz [46.255.230.98]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 514A5C0; Fri, 13 Oct 2023 13:03:03 -0700 (PDT) Received: by jabberwock.ucw.cz (Postfix, from userid 1017) id 144C11C0065; Fri, 13 Oct 2023 22:03:02 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ucw.cz; s=gen1; t=1697227382; 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: in-reply-to:in-reply-to:references:references; bh=v9IjOJlh+NOlawd305vpof4MMBTGRJ5ONp9S38ZFw1c=; b=LTVA2vMPDHy6f9X2wvaF0rXijKZtYNyIjqpLGCUmd5mR2C9PgaZvthJhljP4xJaxbljL+o /LfA9tInl3ITndc8sEonRvdvh2i+lYudbFBS+3nLq6cyqCTTRtNp4iHxVUCdUdBAB1L4wx ekJ7ejGxo1D0JcHvYd7/swG8suifaWA= Date: Fri, 13 Oct 2023 22:03:01 +0200 From: Pavel Machek To: Werner Sembach Cc: ojeda@kernel.org, Lee Jones , linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, linux-input@vger.kernel.org, "dri-devel@lists.freedesktop.org" Subject: Re: Implement per-key keyboard backlight as auxdisplay? Message-ID: References: <20231011190017.1230898-1-wse@tuxedocomputers.com> <0440ed38-c53b-4aa1-8899-969e5193cfef@tuxedocomputers.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="96GhfOL9JQ93T59f" Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --96GhfOL9JQ93T59f Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! > > The specific keyboard RGB controller I want to implement takes 6*21 rgb > > values. However not every one is actually mapped to a physical key. e.g= =2E the > > bottom row needs less entries because of the space bar. Additionally the > > keys are ofc not in a straight line from top to bottom. >=20 > So... a bit of rationale. The keyboard does not really fit into the > LED subsystem; LEDs are expected to be independent ("hdd led") and not > a matrix of them. >=20 > We do see various strange displays these days -- they commonly have > rounded corners and holes in them. I'm not sure how that's currently > supported, but I believe it is reasonable to view keyboard as a > display with slightly weird placing of pixels. >=20 > Plus, I'd really like to play tetris on one of those :-). >=20 > So, would presenting them as auxdisplay be acceptable? Or are there > better options? Oh and... My existing keyboard membrane-based Chicony, and it is from time when PS/2 was still in wide use. I am slowly looking for a new keyboard. If you know of one with nice mechanical switches, RGB backlight with known protocol, and hopefully easily available in Czech republic, let me know. Best regards, Pavel --=20 People of Russia, stop Putin before his war on Ukraine escalates. --96GhfOL9JQ93T59f Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iF0EABECAB0WIQRPfPO7r0eAhk010v0w5/Bqldv68gUCZSmidQAKCRAw5/Bqldv6 8qQ2AKCBGTKHxfVPIxGuMChs0D4oO1LDGwCfakWEaV9v+/Ut+yVuwzG27YC/Yqg= =mzp6 -----END PGP SIGNATURE----- --96GhfOL9JQ93T59f--