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dkim=none (message not signed) header.d=none;collabora.com; dmarc=none action=none header.from=wolfvision.net; Received: from DBBPR08MB4523.eurprd08.prod.outlook.com (2603:10a6:10:c8::19) by DBBPR08MB6298.eurprd08.prod.outlook.com (2603:10a6:10:1f7::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.23; Tue, 13 Jul 2021 08:44:02 +0000 Received: from DBBPR08MB4523.eurprd08.prod.outlook.com ([fe80::ade3:93e2:735c:c10b]) by DBBPR08MB4523.eurprd08.prod.outlook.com ([fe80::ade3:93e2:735c:c10b%7]) with mapi id 15.20.4308.027; Tue, 13 Jul 2021 08:44:02 +0000 Subject: Re: [PATCH v2 1/2] dt-bindings: display: rockchip: Add compatible for rk3568 HDMI To: Benjamin Gaignard , hjc@rock-chips.com, heiko@sntech.de, airlied@linux.ie, daniel@ffwll.ch, robh+dt@kernel.org, algea.cao@rock-chips.com, andy.yan@rock-chips.com 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, kernel@collabora.com References: <20210707120323.401785-1-benjamin.gaignard@collabora.com> <20210707120323.401785-2-benjamin.gaignard@collabora.com> From: Michael Riesch Organization: WolfVision GmbH Message-ID: <1bd64284-0a20-12e3-e2e7-19cdfdbf1a25@wolfvision.net> Date: Tue, 13 Jul 2021 10:44:00 +0200 User-Agent: Mozilla/5.0 (X11; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello Benjamin, The HDMI TX block in the RK3568 requires two power supplies, which have to be enabled in some cases (at least on the RK3568 EVB1 the voltages VDDA0V9_IMAGE and VCCA1V8_IMAGE are disabled by default). It would be great if this was considered by the driver and the device tree binding. I am not sure, though, whether this is a RK3568 specific or rockchip_dw_hdmi specific thing. Maybe it can even enter the Synopsis DW HDMI driver. On 7/7/21 2:03 PM, Benjamin Gaignard wrote: > Define a new compatible for rk3568 HDMI. > This version of HDMI hardware block needs two new clocks hclk_vio and hclk > to provide phy reference clocks. > > Signed-off-by: Benjamin Gaignard > --- > version 2: > - Add the clocks needed for the phy. > > .../bindings/display/rockchip/rockchip,dw-hdmi.yaml | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml > index 75cd9c686e985..cb8643b3a8b84 100644 > --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml > +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml > @@ -23,6 +23,7 @@ properties: > - rockchip,rk3288-dw-hdmi > - rockchip,rk3328-dw-hdmi > - rockchip,rk3399-dw-hdmi > + - rockchip,rk3568-dw-hdmi > > reg-io-width: > const: 4 > @@ -51,8 +52,11 @@ properties: > - vpll > - enum: > - grf > + - hclk_vio > + - vpll > + - enum: > + - hclk > - vpll > - - const: vpll The description and documentation of the clocks are somewhat misleading IMHO. This is not caused by your patches, of course. But maybe this is a chance to clean them up a bit. It seems that the CEC clock is an optional clock of the dw-hdmi driver. Shouldn't it be documented in the synopsys,dw-hdmi.yaml? Also, it would be nice if the clocks hclk_vio and hclk featured a description in the binding. BTW, I am not too familiar with the syntax here, but shouldn't items in clocks and items in clock-names be aligned (currently, there is a plain list vs. an enum structure)? Best regards, Michael > > ddc-i2c-bus: > $ref: /schemas/types.yaml#/definitions/phandle > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel