From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.128.42 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793985023; b=B4BOTIA5hfIHhXqgv+/xLNby4DPoLqU63VsH4nu9Qzo89P7jRphjsNWEcWWdKW1n0Yb6 SGckH5kzQ/G7MNCBx0yRD6U09kugzjURcwW8cCgvfPJ3iIXW589Dh9veacc1pF9POVezo oEBiLjXaaEvBTlAM2P32NFoPrdMu4XD/qSsit6dD8r8mqb2yMEWYnQ/5OYDeTFIei6d8C cP07T2Q15LD8W8ZXa6r/IfbrwMqBPckBmXUtUaIx8N5nPfWQxeYEcJBnxjy6Zu78yPuSD R0ORxkIF1Lke8GsJJ6YBcNJYF3V/KljoRMVkEzDLu7IwLLKpqGnGvteeEHAmOH/rQWw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793985023; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Gm-Gg:X-Received:Received: Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To:X-Mailer; bh=V9n1CV17mWoyinWHCGFvDxtvvBlrLNzZtRYoJJeVLOM=; b=UseLB4urB5Tf8vR8nDA48iZnOC/6+dPW7+atUxKtNkD8nR0E3Em7IwS5TGnhNGSoQQSr JnDUEMMakLdenlB5xNBLaz3+2R83n9mZmRypRQoJa2eC5QPGNFLQA2/NHAAH7B1mN0VdN 9qB+d6MWsb7n7qcsCtQxVy203O/ZwyDpTAbZpQXWsnso5xbjvH+U4DTiOI8d6O+3xv2zA cZYRt0vvtjwAE0mHMAvjuqL8DMvrQBezMiTUzgeAOHZAAJ0ATUzbIKia0xBOmc/Yq7pVd CqkHBtWdX/A3t+S4GRBxTBjwvoUE1264m4H3qm1aBImj3VBm1bVNzeZX4vR2f0PNKew== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=JmCY9+dU; arc=none smtp.remote-ip=209.85.128.42 Received: from mail-wm1-f42.google.com (mail-wm1-f42.google.com [209.85.128.42]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D6207606A326 for ; Fri, 6 Nov 2026 17:10:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D6207606A326 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=JmCY9+dU Received: by mail-wm1-f42.google.com with SMTP id 5b1f17b1804b1-4a214af2076so6265775e9.0 for ; Fri, 06 Nov 2026 09:10:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20260707; t=1793985021; x=1794589821; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=V9n1CV17mWoyinWHCGFvDxtvvBlrLNzZtRYoJJeVLOM=; b=JmCY9+dUgxS5al2xR2i/XttbJnL8MfzEPMrncmnFAJnVL+gRl4itq+wpGv6Jzso3Yj lsk9opNlfH1q6cogTLxcMOr/jZwaFd4QymTJydkFSRwHxhBqO5bObfC5so48hHssFmrq sICMazWWuMHYi0vG8N6PXOEBpXAVQT9rLSS+ierixgnKOc2BfrhI3KS/yQhTLPPENp65 t4QE/4ntdP5IOo0BlYwugM8vilNwIsuvetXiqAeqJsnjdvK1Nk6hiXO3yzYG3Iy/6PeL r1vVQNWfuH1vpSk1OE7ahsO4yut0wnGR1Np/teY+XPdds3Esv96rCGDLziZNRgq+sfZ3 SXmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1793985021; x=1794589821; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=V9n1CV17mWoyinWHCGFvDxtvvBlrLNzZtRYoJJeVLOM=; b=1ReonEfrvcwHKV8k8Z49Rd519vcTePiYHGs14PNVCDlqVGbay04ccSzsuyOquJWxFD 3CmyUICsYWIIq4jSVf64un3eFwlLR3WyGy5aiep8y38mXAFGmn6sEVNU8Mv8+X/TYAZ+ NXATCIXg2eKdCEBwLhaQw5gjYfwpUpuF7w3uy6WJOoI+TUt6r8OBvJ5kShAtqVVlDAJe VpM1Gmy6ueMqNLizV4UG5fVKBfuSpLyKIVf5LH3o7waLDoixWd3Y+NNj0wGr6ZVl6qIc lAPxahR/B3cpY+RBBOnEsUyLWHJxvwzPnU8MQJSbvHUDBtyrYTgLnf1PvJiitZk1ug+L kDZw== X-Forwarded-Encrypted: i=1; AKwUvBxCXeTblQJnFKbHHmG0A0j6/Pr1esI2EIg9IW2c17IjNWEvG2Srz20yczUQZ1RsrFWuY2Gwppg6TOceWw==@vger.kernel.org X-Gm-Message-State: APuU4Z/YIYejyyc3PW0BQgWSy6avlHljioz/jpeOBq3gHk/Gm7rQ8VUf Oyo/K/4ZOkOxddzrFGbD2RUDMaplPJSDV6vU/pZo1qUbsn2AHRORmpne X-Gm-Gg: AYBFou2X9UCMILTmo9IZI0/oe+bX/NPRt2ezEfTBsUMbYY/b8znzGyatwc4608+qbmP H8Z6LjEgRKB3w2RE/I6iNwcKBWLcZB7ADB6t97zhW5iJVLqygMUoBqvkn7+wtEiOcBm/DPTE4v+ 2zFjiqzvoN83n6JJ+kGwgVmtiZXMj0k7hpfFDh7rR/Tr66LabUBeCgrDLYq69fk8YrLDwUfcrR0 kIz+RXE7TOwqiYs3Wmq+raEuYYBB3qAbuxsdu6mvSGN4jQ8MC6Gn4Ha9O1Hmc+xrDJ+/f7Y5Q8A 30WjYWdGdTiOuPo3/HOhi9ajRbxMymih6m3wMuTv+cc8YmdVVQ8i2uw7CnXmWXL3Yiwx3gWBI/O UFcQ/yTzna+R8EPKCciwBeABQoldpwTFwqvjfS22Cz2HPoRzIjALV6eYBufPWg6FY0c4+4QOz+7 8ytEsimIa7klxU0GokX8RyLdIvYz+SfUGmw3DpLDa2TaP+dz0w3Yd3j4o5kxzAOa1dbtEUaSIRr s1lYHVJstt1+paMIiUpfQY6PEfFL//sVFMDeyloeA1dAidCwlXMmyYuBXEM6oE/of0Xy1jUXWr+ 7uPisNN3P3Xz1APQOurSlaLzfTcv5vx0 X-Received: by 2002:a05:600c:64c5:b0:4b0:a7aa:843 with SMTP id 5b1f17b1804b1-4b6df4f1dfdmr55413875e9.25.1793985021160; Fri, 06 Nov 2026 09:10:21 -0800 (PST) Received: from localhost ([82.77.126.113]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b57317cae5sm238886225e9.12.2026.11.06.09.10.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Nov 2026 09:10:20 -0800 (PST) Date: Fri, 6 Nov 2026 19:10:19 +0200 From: Daniel Matyas To: Nam Cao Cc: dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev, Andy Shevchenko , Greg Kroah-Hartman , Alex Lanzano , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org Subject: Re: [RFC] staging: fbtft: Moving fb_ili9341 (and others) to DRM Message-ID: References: <20261105201154.37294-2-matyasdaniel006@gmail.com> <874idv2bol.fsf@yellow.woof> X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <874idv2bol.fsf@yellow.woof> X-Mailer: mutt On Thu, Nov 05, 2026 at 10:47:06PM +0100, Nam Cao wrote: > Daniel Matyas writes: > > Questions: > > a) Is removing fb_ili9341 acceptable, pointing users of other ILI9341 > > modules to panel-mipi-dbi? The KD233 node would then have no driver. > > b) Or should KD233 panel support go into a DRM driver first? I don't have > > its init sequence or physical size, or the board... > > c) Is removal of all of fbtft already planned? > > d) Several other fbtft drivers have drm counterparts. Should I inspect those > > to see if removal is needed? > > IIRC the main reason fbtft needs to stay is because it supports parallel > interface which is missing in the DRM drivers. > > Nam Thank you for clarifying. However, the fb_ili9341 driver uses only the SPI interface. Is it alright then to move (or remove) those drivers that only use SPI interface and have DRM counterparts? Furthermore, would there be a need to enable parallel interface support in the DRM subsystem? Daniel M