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 52784156661; Sun, 16 Nov 2025 11:34:01 +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=1763292841; cv=none; b=MDHT38U6z9zsHA0Ut/22MDXe5ZVXVzfGcPCmQXc4Yxr8CR7q7bdrPNu69oV/chrN930hCQkPwf0EQ/p3Co7znVe0AMwslP1x7Lai2YOZpEssdqG8kgvB0tLVH8NtyQdfnHcl+lvyGgni6FPcYubzlkdY21Cv6iVQRp0AoQ5x6SU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763292841; c=relaxed/simple; bh=ny3KeeNSWknIOt9YTbOdCbwoCy7TChNZ7dJtDoWPC0U=; h=Message-ID:Date:MIME-Version:Subject:From:To:Cc:References: In-Reply-To:Content-Type; b=NpU4vD8eRstE01KRTsIPeu9Hv65gFGBgntzwWx9AQT7oWTHWpRk4r2r6BIi3dWShk3gfiaREtAIeHuzBnD+IrkX3vrZUh+b+X7ewHSOCUQCugSd4PJNfBSa+nV7OposavvcJ8+rXpqXskThRSaHhusZMPV/fYaDrhsxU5L4X5iQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Dq2o3am8; 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="Dq2o3am8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 492FAC4CEF1; Sun, 16 Nov 2025 11:33:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763292841; bh=ny3KeeNSWknIOt9YTbOdCbwoCy7TChNZ7dJtDoWPC0U=; h=Date:Subject:From:To:Cc:References:In-Reply-To:From; b=Dq2o3am8UhFpUdR7ehx3B9NmzrjIMZgUOkqGvmEbTxarqQ24b7uf9u+J6iaZlLf1G DIvD6jNZpQqLNKFFWW2kZCV2xJfn6Ea0eeBF0QfnYGyFb74bTGVZ8/eCgSZOlDsTiw AHSQEETowYK/u/G9mVkrbcbYMHMh58QF//ppYmNBym5IgfnhQJ2HB4t4DOjw2OAVD5 KBmG0hFFvQTDg7Ys3bOPZA/ul1fHbBunYJX0BJ/Uyz9LPbkIUGk5Y1gXB97vQs7UQs Y6lctvHk+cVjk3pDEMdwGeQt5kOMYoYs8mhWUrn7V+2+Cm25cuDo4wQX77cM7Waouq WHm6PLhcwy2ww== Message-ID: <4b4ebcc2-491a-42d3-9758-60de80ce5eb6@kernel.org> Date: Sun, 16 Nov 2025 12:33:55 +0100 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 6/7] dt-bindings: display: allwinner: Update H616 DE33 binding From: Krzysztof Kozlowski To: Jernej Skrabec Cc: wens@csie.org, samuel@sholland.org, mripard@kernel.org, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org References: <20251115141347.13087-1-jernej.skrabec@gmail.com> <20251115141347.13087-7-jernej.skrabec@gmail.com> <20251116-pigeon-of-optimal-blizzard-2cb3b3@kuoka> Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 16/11/2025 12:33, Krzysztof Kozlowski wrote: > On Sat, Nov 15, 2025 at 03:13:46PM +0100, Jernej Skrabec wrote: >> As it turns out, current H616 DE33 binding was written based on >> incomplete understanding of DE33 design. Namely, planes are shared >> resource and not tied to specific mixer, which was the case for previous >> generations of Display Engine (DE3 and earlier). >> >> This means that current DE33 binding doesn't properly reflect HW and >> using it would mean that second mixer (used for second display output) >> can't be supported. >> >> Update DE33 mixer binding so instead of referencing planes register >> space, it contains phandle to newly introduced DE33 planes node. >> >> There is no user of this binding yet, so changes can be made safely, >> without breaking any backward compatibility. > > And why would you configure statically - per soc - always the same plane > as per mixer? If you do that, it means it is really fixed and internal > to display engine thus should not be exposed in DT. > > Describing each IP block resource in DT is way too granular. > BTW, everything is update, thus subject is really non-informative. Best regards, Krzysztof