linux-kernel - Re: [PATCH 5/5] ARM: tegra: Add hdmi to Tegra114 Dalmore device tree

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Message-ID: <521DF1E9.7050504@nvidia.com>
Date:	Wed, 28 Aug 2013 15:49:45 +0300
From:	Mikko Perttunen <mperttunen@...dia.com>
To:	Thierry Reding <thierry.reding@...il.com>
CC:	Terje Bergstrom <tbergstrom@...dia.com>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/5] ARM: tegra: Add hdmi to Tegra114 Dalmore device tree

On 08/28/2013 03:30 PM, Thierry Reding wrote:
> * PGP Signed by an unknown key
>
> On Wed, Aug 28, 2013 at 01:40:59PM +0300, Mikko Perttunen wrote:
>> Add hdmi node to Dalmore device tree to supply Dalmore-specific
>
> s/hdmi/HDMI/

Will fix.

>
>> diff --git a/arch/arm/boot/dts/tegra114-dalmore.dts b/arch/arm/boot/dts/tegra114-dalmore.dts
> [...]
>> +	host1x {
>> +		hdmi {
>> +			status = "okay";
>> +
>> +			vdd-supply = <&vdd_hdmi_reg>;
>> +			pll-supply = <&palmas_smps3_reg>;
>> +			nvidia,ddc-i2c-bus = <&hdmi_ddc>;
>
> I prefer to use a blank line to separate "standard" from
> "vendor-specific" properties.

Will fix.

>
>> +			nvidia,hpd-gpio = <&gpio TEGRA_GPIO(N, 7) GPIO_ACTIVE_HIGH>;
>
> Other .dts files split this so it doesn't exceed 80 characters. I'm not
> sure how useful that is as a general rule for DT source files, though.

Will fix. I guess check_patch.pl doesn't check for line length in *.dts.

>
>>   	i2c@...0d000 {
>>   		status = "okay";
>>   		clock-frequency = <400000>;
>> @@ -1169,6 +1184,8 @@
>>   			regulator-min-microvolt = <5000000>;
>>   			regulator-max-microvolt = <5000000>;
>>   			enable-active-high;
>> +			regulator-always-on;
>> +			regulator-boot-on;
>
> This warrants at least a mention in the commit message.

Hmm, yeah. Looks like the HDMI driver only enables the Vdd in 
tegra_output_hdmi_enable, which is too late at least for DDC. I guess a 
better patch would be to enable it earlier. In _probe?

>
> Thierry
>
> * Unknown Key
> * 0x7F3EB3A1
>
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