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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 62B5DCD13DA for ; Sat, 2 May 2026 21:17:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=7RqPKh7sZHF+28JeEz6CG7pr0J0NFZKqUhuzHW8CkS4=; b=MaGhHd+aGE7bzRDCyIqfociaXW JWrhHjNZLG8r/2izD13f1HEpWDggtQJMJhMx0G33knJ2U82LF3qwTrMOldCaXGSby6Q1eD8WGxSgR CUn2EHMeaFFATGDVolvnqZ34G6mXJbaS/tn/fyMD5J8aJ/LmNnDnoAiDewaOB1BfRrWFk30bUdX/+ hy2ph6pTMW+IRuj+LjBsZ19MtPNazYexyK6Qqo4xTY7by1VPMuYIL+aHRglYQ/Fk5Q2ioNmj1n5Bo fz+YWHpzfRQQj2RDNYWki8zkgpaeiJKk1ngal0L2649vh7BtI/h2mALMw9JzBzS44eTSglXS1OeTs zcrKmNwQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wJHiZ-00000009iTK-2AfB; Sat, 02 May 2026 21:17:43 +0000 Received: from mout-p-101.mailbox.org ([80.241.56.151]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wJHiX-00000009iSJ-0b0J for linux-arm-kernel@lists.infradead.org; Sat, 02 May 2026 21:17:42 +0000 Received: from smtp102.mailbox.org (smtp102.mailbox.org [10.196.197.102]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-101.mailbox.org (Postfix) with ESMTPS id 4g7LMr6WTvz9tFH; Sat, 2 May 2026 23:17:28 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1777756648; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7RqPKh7sZHF+28JeEz6CG7pr0J0NFZKqUhuzHW8CkS4=; b=LCK7vt8ywGFsDdethYein7AVOvM26O4jQ9Sj3DG5Xxm30lSzd6GGRhCm4zndiMUjtJzpgG TW2jcM9fV0MxczPq4R400BQkm7zzIZharv3QvcfJrQ9R9qR70pymuDUGFVDGo2W7aF6BSe jgQNpRpZOJPyzmtfJqdK2rEfFnA1BC8iXcy5vv6uYNYoCW3k7snTwkShxwZux5gEVd6ArP BBVMt09eySjv4oNKWeX9E+3sUhNHhpnzxlZLDAyCI8W7Pk5k5AN/v0qMi+bML9iObdk6+B K1ObvvGcSLG+5SIFWwGg+Y3kfTGvTSUQ08eypdez+00C56a6acb39N1HDNnueg== Message-ID: <71b24195-2a3c-46a4-8587-f5055a015eb8@mailbox.org> Date: Sat, 2 May 2026 23:17:22 +0200 MIME-Version: 1.0 Subject: Re: [PATCH 1/7] dt-bindings: display: renesas,du: Document Renesas R-Car R8A779MD M3Le To: Geert Uytterhoeven Cc: linux-arm-kernel@lists.infradead.org, Conor Dooley , David Airlie , Kieran Bingham , Krzysztof Kozlowski , Kuninori Morimoto , Laurent Pinchart , Magnus Damm , Maxime Ripard , Michael Turquette , Rob Herring , Simona Vetter , Stephen Boyd , Thomas Zimmermann , Tomi Valkeinen , devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org References: <20260419193718.133174-1-marek.vasut+renesas@mailbox.org> <20260419193718.133174-2-marek.vasut+renesas@mailbox.org> Content-Language: en-US From: Marek Vasut In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-MBO-RS-META: 39hpsyab6hn1upgtg1dgny8ski4mntmu X-MBO-RS-ID: 22ba611169e36e18812 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260502_141741_341644_192D33F3 X-CRM114-Status: GOOD ( 12.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 4/29/26 11:57 AM, Geert Uytterhoeven wrote: Hello Geert, > On Sun, 19 Apr 2026 at 21:37, Marek Vasut > wrote: >> Extend the Renesas DU display bindings to support the Renesas R-Car >> R8A779MD M3Le SoC. This SoC is similar to R-Car R8A77965 M3-N SoC, >> except the HDMI port@1 is not present. > > "and DU1 is unused." (whatever that may mean...) Fixed in V2. >> +++ b/Documentation/devicetree/bindings/display/renesas,du.yaml >> @@ -42,6 +42,7 @@ properties: >> - renesas,du-r8a779a0 # for R-Car V3U compatible DU >> - renesas,du-r8a779g0 # for R-Car V4H compatible DU >> - renesas,du-r8a779h0 # for R-Car V4M compatible DU >> + - renesas,du-r8a779md # for R-Car M3Le compatible DU > > I am not sure you need a new compatible value: is the DU really > different than on R-Car M3-N, or does it just lack some wiring? ... It seems the DU is identical to the M3N one, so I will add another entry to R8A77965 DU to handle the M3Le one, just like R8A774B1 and R8A774E1 DUs . I hope that is acceptable, and also addresses the feedback on this patch ? I dumped the VSP and FCP versions on M3N and M3Le and compared them, and I also wrote and read-back the CMM registers to confirm CMM IPs are all present on both M3N and M3Le: FCP is identical on M3N and M3Le: fe950000.fcp FCP_VCR=0x106 fe96f000.fcp FCP_VCR=0x106 fe9af000.fcp FCP_VCR=0x106 fea27000.fcp FCP_VCR=0x106 fea2f000.fcp FCP_VCR=0x106 VSP is identical on M3N and M3Le: fe960000.vsp IP_VERSION=0x01011504 fe9a0000.vsp IP_VERSION=0x01011404 fea20000.vsp IP_VERSION=0x01011904 fea28000.vsp IP_VERSION=0x01011704 CMMs are present on M3N and M3Le, tested with write of bits 28 and 24 into CM2_CLU_CTRL and then readback: fea40000.cmm CM2_CLU_CTRL readback 0x11000000 fea50000.cmm CM2_CLU_CTRL readback 0x11000000 fea70000.cmm CM2_CLU_CTRL readback 0x11000000 And it does indeed look like we do have DOTCLKIN1 .