linux-kernel - Re: [PATCH] arm64: dts: imx8mp-evk: Add native HDMI output

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Message-ID: <c3b73039-86b7-4456-b059-4467abf3e287@nxp.com>
Date: Thu, 22 Aug 2024 14:37:40 +0800
From: Liu Ying <victor.liu@....com>
To: Alexander Stein <alexander.stein@...tq-group.com>,
 devicetree@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
 festevam@...il.com
Subject: Re: [PATCH] arm64: dts: imx8mp-evk: Add native HDMI output

On 08/22/2024, Alexander Stein wrote:
> Hi,

Hi,

> 
> Am Donnerstag, 22. August 2024, 05:33:18 CEST schrieb Liu Ying:
>> J17 on i.MX8mp EVK base board is a HDMI type A connector.
>> It connects with i.MX8mp HDMI PHY.  Add support for it.
>>
>> Signed-off-by: Liu Ying <victor.liu@....com>
>> ---
>>  arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 46 ++++++++++++++++++++
>>  1 file changed, 46 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
>> index 938347704136..f118fe8ab5ac 100644
>> --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
>> +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
>> @@ -56,6 +56,18 @@ memory@...00000 {
>>  		      <0x1 0x00000000 0 0xc0000000>;
>>  	};
>>  
>> +	native-hdmi-connector {
> 
> Is there a non-nativ HDMI connector? If not this is somewhat misleading.

Yes, there is a 'hdmi-connector' node in this file.
It is for ADV7535 MIPI DSI to HDMI bridge.

> 
>> +		compatible = "hdmi-connector";
>> +		label = "HDMI OUT";
>> +		type = "a";
>> +
>> +		port {
>> +			hdmi_out: endpoint {
> 
> That's an input port of the HDMI connector. It should be called hdmi_in or similar.
> Right now it's connecting 'hdmi_out' and 'hdmi_tx_out' which looks confusing.

I'll use hdmi_in in next version.  Thanks.

> 
> Best regards,
> Alexander
> 
>> +				remote-endpoint = <&hdmi_tx_out>;
>> +			};
>> +		};
>> +	};
>> +
>>  	pcie0_refclk: pcie0-refclk {
>>  		compatible = "fixed-clock";
>>  		#clock-cells = <0>;
>> @@ -408,6 +420,28 @@ &flexcan2 {
>>  	status = "disabled";/* can2 pin conflict with pdm */
>>  };
>>  
>> +&hdmi_pvi {
>> +	status = "okay";
>> +};
>> +
>> +&hdmi_tx {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&pinctrl_hdmi>;
>> +	status = "okay";
>> +
>> +	ports {
>> +		port@1 {
>> +			hdmi_tx_out: endpoint {
>> +				remote-endpoint = <&hdmi_out>;
>> +			};
>> +		};
>> +	};
>> +};
>> +
>> +&hdmi_tx_phy {
>> +	status = "okay";
>> +};
>> +
>>  &i2c1 {
>>  	clock-frequency = <400000>;
>>  	pinctrl-names = "default";
>> @@ -604,6 +638,10 @@ &lcdif1 {
>>  	status = "okay";
>>  };
>>  
>> +&lcdif3 {
>> +	status = "okay";
>> +};
>> +
>>  &micfil {
>>  	#sound-dai-cells = <0>;
>>  	pinctrl-names = "default";
>> @@ -858,6 +896,14 @@ MX8MP_IOMUXC_NAND_READY_B__GPIO3_IO16	0x140
>>  		>;
>>  	};
>>  
>> +	pinctrl_hdmi: hdmigrp {
>> +		fsl,pins = <
>> +			MX8MP_IOMUXC_HDMI_DDC_SCL__HDMIMIX_HDMI_SCL	0x1c2
>> +			MX8MP_IOMUXC_HDMI_DDC_SDA__HDMIMIX_HDMI_SDA	0x1c2
>> +			MX8MP_IOMUXC_HDMI_CEC__HDMIMIX_HDMI_CEC		0x10
>> +		>;
>> +	};
>> +
>>  	pinctrl_hog: hoggrp {
>>  		fsl,pins = <
>>  			MX8MP_IOMUXC_HDMI_HPD__HDMIMIX_HDMI_HPD		0x40000010
>>
> 
> 

-- 
Regards,
Liu Ying