From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5E0982DCF4A; Thu, 3 Jul 2025 09:46:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751535965; cv=none; b=eaX5tcG9jO/3c9MU+5g47hVcls1UhSIplFgWlMgOBWy+wsrXjUd1FLOFOhiFm4xMii3dQ0HXWaoLO64AI7wnjAREAyJj/IU/kODnLYkRzhWgzZDF7aX3FRMxYkwAqIUebhWR7L00ML/+kHpR6WTZ29R1zYaXuSzJMBvn7+DxyTc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751535965; c=relaxed/simple; bh=TqdILGUNLtHaa0kCIrn2n4mfoPZE8hzzx5z+kIeQFjE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=mmAbtcisI6xBpyNxdVNJ+VYfkPTC1t1wJcoFk6RziEvQIfzkdQvsZoi7oT3ILCOqUcqoq+UYN0pmk9UhJgYLQgI9MgYnjCpzR2gITf52HKROf3E7jHwpguBJ3MnsTNdkp2e34q8xRVOnmLANKr218x+z9/VlL5eFMXdgxAcEEWg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lJMnHNxG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lJMnHNxG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF723C4CEEB; Thu, 3 Jul 2025 09:45:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1751535964; bh=TqdILGUNLtHaa0kCIrn2n4mfoPZE8hzzx5z+kIeQFjE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=lJMnHNxGEsCc4AINdhA6QQ7tcG9NUVosc4hrtxWYkvPH0dQEH5A31Oz+dlQzZnrSF r/r06Q9f0oWYzkIgq9JUHw1dhm/rbnR1LA2dJaHKLKc2XzgkNRsPZgGjeaey0mAHQN qmhK+aoVeMKQYCQck8COGRberTNMRmMs9OVnof5sTrjjFXgYsPF+HM5sP3NtBZMRA/ OzC7Zg10KWGcEolc5ibRqWlVviocNADbL7zSWx4iWDHT6c90c3nhXwdPTmuUJpQWL4 BjCFhXLIwOF7EKjQ8GIvShR9s2XgUOnvw5bjx1sVV7q8OvTNJtMlq8wtgzsUCWqViM jIqiAVLxVTDPg== Message-ID: <6af504ef-55b8-4599-a379-40842edfcfa5@kernel.org> Date: Thu, 3 Jul 2025 11:45:57 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/5] dt-bindings: display: simple-framebuffer: Add interconnects property To: Maxime Ripard , Hans de Goede Cc: Thomas Zimmermann , Luca Weiss , Maarten Lankhorst , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Javier Martinez Canillas , Helge Deller , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250623-simple-drm-fb-icc-v2-1-f69b86cd3d7d@fairphone.com> <20250627-mysterious-optimistic-bird-acaafb@krzk-bin> <1129bc60-f9cb-40be-9869-8ffa3b3c9748@kernel.org> <8a3ad930-bfb1-4531-9d34-fdf7d437f352@redhat.com> <85521ded-734d-48e8-8f76-c57739102ded@kernel.org> <6e4253dd-cd73-4302-b9df-44c8c311eb22@kernel.org> <20250703-light-baboon-of-experiment-179ca3@houat> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 03/07/2025 11:41, Maxime Ripard wrote: >>> But does that work with *any* device that requires interconnects? The next such simple-framebuffer device should work out of the box *without* the kernel knowing anything about it. That's one of the key features of the simple-framebuffer.  If we have to maintainer per-device feature sets, it breaks that assumption. >> >> The driver code for this can still be generic and since the driver >> will bind to the fallback plain "simple-framebuffer" compatible >> this should also work for new platforms. >> >> The e.g. "qcom.simple-framebuffer-sm8650-mdss" compatible would >> purely be something in the dt-bindings to document which simplefb >> implementations will have interconnects and which ones will not. >> >> The driver does not necessarily need to check these more >> precise compatibles, it can still just check for the generic >> presence of interconnects. > > This ship has kind of sailed though. This binding has been used by > plenty of firmwares and bootloaders over the years, and has been > deployed on plenty of devices already. > > Good luck fixing it in all of them, and then updating every device. No one suggested that... We speak about new devices, although maybe this one SM7635 new device runs plenty of firmwares and bootloaders? Best regards, Krzysztof