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([2a02:810b:f40:4600:b44:d8c3:6fa8:c46f]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-41f87b26675sm59904325e9.2.2024.05.09.05.43.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 09 May 2024 05:43:35 -0700 (PDT) Message-ID: <1190cfb6-e2d1-4910-ad57-f7566343ff19@gmail.com> Date: Thu, 9 May 2024 14:43:34 +0200 Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/7] Add DSI support for RK3128 To: =?UTF-8?Q?Heiko_St=C3=BCbner?= , Andy Yan Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, sebastian.reichel@collabora.com, Sandy Huang , Maarten Lankhorst , Krzysztof Kozlowski , Daniel Vetter , Maxime Ripard , Conor Dooley , Rob Herring , Thomas Zimmermann , David Airlie , Michael Turquette , Stephen Boyd References: <20240509120715.86694-1-knaerzche@gmail.com> <38423821.XM6RcZxFsP@diego> Content-Language: en-US From: Alex Bee In-Reply-To: <38423821.XM6RcZxFsP@diego> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Heiko Am 09.05.24 um 14:21 schrieb Heiko Stübner: > Hi Alex, > > Am Donnerstag, 9. Mai 2024, 14:07:08 CEST schrieb Alex Bee: >> This series aims to add support for the DesignWare MIPI DSI controller and >> the Innoslicon D-PHY found in RK3128 SoCs. The code additions are rather >> tiny: It only need some code in the Rockchip dw-mipi-dsi glue layer for >> this SoC, add support for an additional clock and do some changes in the >> SoC's clock driver. Support for the phy was already added when the >> Innosilicon D-PHY driver was initially submitted. I tested it with a >> 800x1280 DSI panel where all 4 lanes that are supported are used. >> >> changes in v2: >> To improve power-efficiency when the DSI controller is not in use, I >> dropped the patch which made hclk_vio_h2p a critical clock and instead >> added support for an AHB clock to the DSI controller driver and updated >> the bindings and the addition to the SoC DT accordingly. > The naming already suggests that hclk_vio_h2p is not a clock-part of > the actual dsi controller, but more an internal thing inside the clock > controller. > > At least naming and perceived functionality would suggest a chain of > hclk_vio -> hclk_vio_h2p -> pclk_mipi I personally wouldn't give to much on naming when it comes to Rockchip CRUs. Actually looking at "Fig. 2-5 Chip Clock Architecture Diagram 4" of RK312x its: ... -> hclk_vio                    -> hclk_h2p (clock in question)                    -> pclk_mipi (DSI APB clock)                    -> hclk_rga                    -> hclk_vop                    .... Also there is no other display output path (HDMI, LVDS) which requires this clock to be enabled. They all work when it's disabled. That really makes me think it's just the AHB clock line for the DSI controller. Maybe Andy can share some details? Alex > In any case, I really don't see hclk_vio_h2p to be in the realm of the > actual DSI controller, but more a part of clock-controller / interconnect. > Similar to the NIU clocks for the interconnect. > > rk3588 actually tries to implement this already and while the > gate-link clocks are described as "recent", I think this definitly the same > concept used a most/all older Rockchip SoCs, just nobody cared about that > till now ;-) [0] . > > So TL;DR I'd really prefer to not leak CRU-details into the DSI controller. > > > Heiko > > [0] Which reminds me that I should look at Sebastian's make GATE-LINK > actually-work-patch. > > > > 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 1AAD1C10F1A for ; Thu, 9 May 2024 12:43:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id: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=WNH1xMoA7qzybe+iFdKO6RcK07JSrqtUF+3KyXMs2N0=; b=E0b9P+e0vGMmpX wy+h8jyPFYUtW47hds72nxd6gb6AupqwIRzyHbV2yct9Dwq+SYxkb2Uhgsx/901boGNGe8rqWclRg 87+2bFotam8JSoHMOZfxq4rSVWHUJIO4y/5cNPbahJ/qgp44nqGiUvBsFAYierks1V1/lhcXTohnu TzOvY9RFmtMuzElMvttzi29zF0mlfjujK3VqWHU+4+fu0GvFxSMZa+HqLOb7QoCax+4tMGhQDnPUS NViCgzUNNeMr8Fe6U8JY0VYg/SmXlU898x3aT7yXwGG/6K/07momm1vXq23VprolQ70ENVTV0i+yD VC8Sfl8oc46k6i8Prgeg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s537e-00000001T6E-0bwa; Thu, 09 May 2024 12:43:42 +0000 Received: from mail-wm1-x334.google.com ([2a00:1450:4864:20::334]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s537a-00000001T5F-0MB3; Thu, 09 May 2024 12:43:39 +0000 Received: by mail-wm1-x334.google.com with SMTP id 5b1f17b1804b1-41b7a26326eso5946715e9.3; Thu, 09 May 2024 05:43:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1715258616; x=1715863416; darn=lists.infradead.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=ukFRa6jd0YhZA7RQLCPnJfFHsXtdSwr8V5mOexEjdho=; b=ijmW+48i+aVUB7wp1vc5yyrAOvboZS0+atlZQooPv69HCN2qesGgpxRoyqMMb6fZ8Y VinkLSoneeLCRVqH/z4fq+4WDzIxaosSSuboMekOYu6MKrG8gfnuaEvWMA9N8d17UzTs jSgd1q6H6mNjx+8upEGpsOaYjRAdMPobvlqrQBJL3zeLpmuBwB2TjK+jj8S25TnfrQnR ReJPkjMKOwudyS028fLiPeLZCK4UEZTfK1xtQNmFIJ5xtKpIn+AfxE4JZQOIl82EK2KQ 0ZM7YziddIthRmBr20RTimgokp4Gt5UuehstBMcJqKLkc6/wdxbWflezg8J5xrVy7Xm4 AGUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1715258616; x=1715863416; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ukFRa6jd0YhZA7RQLCPnJfFHsXtdSwr8V5mOexEjdho=; b=dkTVFaXcTNA79y7FHL2sVjL1ne1OKBgF86hLAbMSJO02bVxpgYxAY+UzNl3O/9P2M+ agETbhfkIop1Cdgcv5Xl1HkOiSl0vdSxIPkqt02uZdSBHr/K/Y4UiB2s8FN7u5BGDQS7 iYyg7JIEQbX7cVv5TVd6y1OCvsTQv/P+d9/VHJI9Y4XRhcasJSZxue1f2IjN+c9pAQ2J TgX0OR13yFZtIs3I+9N88Y7wgaEtv0ekA1flyo5e2+hqPSw7DKP/YAny8hu72HY++5b3 D8tfkBvC2+ncnji6y1ms6HS5FQV2g/Mle3bRoTOXtN4HCBqpsYl+ugvj+tThGWzF2SIy TKUw== X-Forwarded-Encrypted: i=1; AJvYcCUYXv0Lz9MKmG7iggLvSEe6cYF86WZsqAK3/Aa5ngnkdKk6aPnGEpHWeRIvKt+gem3AW1Jho7GRrMjjyUQKNqarmR6MlwlejInNKRWgvnQRT2FdeZG0TbDqAmo0Mefym82ch6mtu2Cc1pj+WGb+Yk3EUYnjR3Covdc= X-Gm-Message-State: AOJu0YyHAjEpx31ATA4gLwwGH01lLUb8Vi5WLvHFvOAO0oMpiSu8e5XF tB/UxDkBZbKB8+mT9kP7j5aP9i2q+9SJfrffr9hmHQmiUYXZFzI= X-Google-Smtp-Source: AGHT+IH91edNyT90V4bTzKolAoCvVxJlY9gxXvUn7JsOUYnFiQrJLSLCJeZJDn8SANfleGSnxvbfFw== X-Received: by 2002:a05:600c:450c:b0:418:fb6f:5f59 with SMTP id 5b1f17b1804b1-41f71cc25a8mr45229895e9.2.1715258616089; Thu, 09 May 2024 05:43:36 -0700 (PDT) Received: from ?IPV6:2a02:810b:f40:4600:b44:d8c3:6fa8:c46f? ([2a02:810b:f40:4600:b44:d8c3:6fa8:c46f]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-41f87b26675sm59904325e9.2.2024.05.09.05.43.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 09 May 2024 05:43:35 -0700 (PDT) Message-ID: <1190cfb6-e2d1-4910-ad57-f7566343ff19@gmail.com> Date: Thu, 9 May 2024 14:43:34 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/7] Add DSI support for RK3128 To: =?UTF-8?Q?Heiko_St=C3=BCbner?= , Andy Yan Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, sebastian.reichel@collabora.com, Sandy Huang , Maarten Lankhorst , Krzysztof Kozlowski , Daniel Vetter , Maxime Ripard , Conor Dooley , Rob Herring , Thomas Zimmermann , David Airlie , Michael Turquette , Stephen Boyd References: <20240509120715.86694-1-knaerzche@gmail.com> <38423821.XM6RcZxFsP@diego> Content-Language: en-US From: Alex Bee In-Reply-To: <38423821.XM6RcZxFsP@diego> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240509_054338_147100_C737537E X-CRM114-Status: GOOD ( 22.37 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; 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