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Message-ID: <55DB1432.7030309@rock-chips.com>
Date: Mon, 24 Aug 2015 20:55:14 +0800
From: Yakir Yang <ykk@...k-chips.com>
To: Jingoo Han <jingoohan1@...il.com>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>
CC: Rob Herring <robherring2@...il.com>,
Heiko Stuebner <heiko@...ech.de>,
Sean Paul <seanpaul@...gle.com>, Takashi Iwai <tiwai@...e.de>,
dri-devel <dri-devel@...ts.freedesktop.org>,
Andrzej Hajda <a.hajda@...sung.com>,
Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>,
Vincent Palatin <vpalatin@...omium.org>,
Kishon Vijay Abraham I <kishon@...com>,
"linux-rockchip@...ts.infradead.org"
<linux-rockchip@...ts.infradead.org>,
Russell King <rmk+kernel@....linux.org.uk>,
Thierry Reding <treding@...dia.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
Pawel Moll <pawel.moll@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
David Airlie <airlied@...ux.ie>,
Doug Anderson <dianders@...gle.com>,
Inki Dae <inki.dae@...sung.com>,
Ajay kumar <ajaynumb@...il.com>,
Rob Herring <robh+dt@...nel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
Mark Yao <mark.yao@...k-chips.com>,
Fabio Estevam <fabio.estevam@...escale.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Kyungmin Park <kyungmin.park@...sung.com>,
Daniel Kurtz <djkurtz@...gle.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Kumar Gala <galak@...eaurora.org>,
Joe Perches <joe@...ches.com>,
Andy Yan <andy.yan@...k-chips.com>
Subject: Re: [PATCH v3 06/14] Documentation: drm/bridge: add document for
analogix_dp
Hi Jingoo,
在 08/24/2015 03:40 PM, Jingoo Han 写道:
> On 2015. 8. 24., at AM 9:43, Krzysztof Kozlowski <k.kozlowski@...sung.com> wrote:
>> 2015-08-24 8:23 GMT+09:00 Rob Herring <robherring2@...il.com>:
>>>> On Wed, Aug 19, 2015 at 9:50 AM, Yakir Yang <ykk@...k-chips.com> wrote:
>>>> Analogix dp driver is split from exynos dp driver, so we just
>>>> make an copy of exynos_dp.txt, and then simplify exynos_dp.txt
>>>>
>>>> Beside update some exynos dtsi file with the latest change
>>>> according to the devicetree binding documents.
>>> You can't just change the exynos bindings and break compatibility. Is
>>> there some agreement with exynos folks to do this?
>> No, there is no agreement. This wasn't even sent to Exynos maintainers.
>> Additionally the patchset did not look interesting to me because of
>> misleading subject - Documentation instead of "ARM: dts:".
>>
>> Yakir, please:
>> 1. Provide backward compatibility. Mark old properties as deprecated
>> but still support them.
>> 2. Separate all DTS changes to a separate patch, unless bisectability
>> would be hurt. Anyway you should prepare it in a such way that
>> separation would be possible without breaking bisectability.
>> 3. Use proper subject for the patch changing DTS. This is not
>> documentation change!
>> 4. Please use script get_maintainers to obtain list of valid
>> maintainers and CC-them with at least cover letter and patches
>> requiring their attention.
> To Yakir Yang,
>
> Please be careful when you CC people.
>
> I don't find the reason why you CC'ed the following people. Of course, they
> look to be one of the talented developers. However, they look to be
> unrelated to your patchset.
>
> Takashi Iwai
> Vincent Palatin
> Fabio Estevam
> Philipp Zabel
Yeah, actually I just got those people from patman tools. Thanks for your
remind, I would pay more attention in next version :-)
>
> Also, please add Exynos Architecture maintainers to CC list. I don't understand
> why you removed them from CC list.
> Kukjin Kim
> Krzysztof Kozlowski
>
> Without their Ack, you will not change the codes of ARM Exynos Architecture.
Wow, thanks a lot, it's a serious mistaken ;)
Thanks,
- Yakir
> Best regards,
> Jingoo Han
>
>> Best regards,
>> Krzysztof
>>
>>
>>>
>>>> Signed-off-by: Yakir Yang <ykk@...k-chips.com>
>>>> ---
>>>> Changes in v3:
>>>> - Take Heiko suggest, add devicetree binding documents.
>>>> - Take Thierry Reding suggest, remove sync pol & colorimetry properies
>>>> from the new analogix dp driver devicetree binding.
>>>> - Update the exist exynos dtsi file with the latest DP DT properies.
>>>>
>>>> Changes in v2: None
>>>>
>>>> .../devicetree/bindings/drm/bridge/analogix_dp.txt | 70 ++++++++++++++++++++++
>>>> .../devicetree/bindings/video/exynos_dp.txt | 50 ++++++----------
>>>> arch/arm/boot/dts/exynos5250-arndale.dts | 10 ++--
>>>> arch/arm/boot/dts/exynos5250-smdk5250.dts | 10 ++--
>>>> arch/arm/boot/dts/exynos5250-snow.dts | 12 ++--
>>>> arch/arm/boot/dts/exynos5250-spring.dts | 12 ++--
>>>> arch/arm/boot/dts/exynos5420-peach-pit.dts | 12 ++--
>>>> arch/arm/boot/dts/exynos5420-smdk5420.dts | 10 ++--
>>>> arch/arm/boot/dts/exynos5800-peach-pi.dts | 12 ++--
>>>> 9 files changed, 119 insertions(+), 79 deletions(-)
>>>> create mode 100644 Documentation/devicetree/bindings/drm/bridge/analogix_dp.txt
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/drm/bridge/analogix_dp.txt b/Documentation/devicetree/bindings/drm/bridge/analogix_dp.txt
>>>> new file mode 100644
>>>> index 0000000..6127018
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/drm/bridge/analogix_dp.txt
>>>> @@ -0,0 +1,70 @@
>>>> +Analogix Display Port bridge bindings
>>>> +
>>>> +Required properties for dp-controller:
>>>> + -compatible:
>>>> + platform specific such as:
>>>> + * "samsung,exynos5-dp"
>>>> + * "rockchip,rk3288-dp"
>>>> + -reg:
>>>> + physical base address of the controller and length
>>>> + of memory mapped region.
>>>> + -interrupts:
>>>> + interrupt combiner values.
>>>> + -clocks:
>>>> + from common clock binding: handle to dp clock.
>>>> + -clock-names:
>>>> + from common clock binding: Shall be "dp".
>>>> + -interrupt-parent:
>>>> + phandle to Interrupt combiner node.
>>>> + -phys:
>>>> + from general PHY binding: the phandle for the PHY device.
>>>> + -phy-names:
>>>> + from general PHY binding: Should be "dp".
>>>> + -analogix,color-space:
>>>> + input video data format.
>>>> + COLOR_RGB = 0, COLOR_YCBCR422 = 1, COLOR_YCBCR444 = 2
>>>> + -analogix,color-depth:
>>>> + number of bits per colour component.
>>>> + COLOR_6 = 0, COLOR_8 = 1, COLOR_10 = 2, COLOR_12 = 3
>>> This seems pretty generic. Just use 6, 8, 10, or 12 for values. And
>>> drop the vendor prefix.
>>>
>>>> + -analogix,link-rate:
>>>> + max link rate supported by the eDP controller.
>>>> + LINK_RATE_1_62GBPS = 0x6, LINK_RATE_2_70GBPS = 0x0A,
>>>> + LINK_RATE_5_40GBPS = 0x14
>>> Same here. I'd rather see something like "link-rate-mbps" and use the
>>> actual rate.
>>>
>>>> + -analogix,lane-count:
>>>> + max number of lanes supported by the eDP contoller.
>>>> + LANE_COUNT1 = 1, LANE_COUNT2 = 2, LANE_COUNT4 = 4
>>> And drop the vendor prefix here.
>>>
>>>> + -port@[X]: SoC specific port nodes with endpoint definitions as defined
>>>> + in Documentation/devicetree/bindings/media/video-interfaces.txt,
>>>> + please refer to the SoC specific binding document:
>>>> + * Documentation/devicetree/bindings/video/exynos_dp.txt
>>>> + * Documentation/devicetree/bindings/video/analogix_dp-rockchip.txt
>>>> +
>>>> +Optional properties for dp-controller:
>>>> + -analogix,hpd-gpio:
>>>> + Hotplug detect GPIO.
>>>> + Indicates which GPIO should be used for hotplug
>>>> + detection
>>> We should align with "hpd-gpios" used by HDMI connector binding. Or do
>>> we need a DP connector binding that this should be defined in?
>>> Probably so.
>>>
>>> The DRM related bindings are such a cluster f*ck with everyone picking
>>> their own way to do things. Just grep hpd in bindings for starters.
>>> That is just the tip.
>>>
>>>> + -video interfaces: Device node can contain video interface port
>>>> + nodes according to [1].
>>> Isn't this the same as ports above? How are they optional? 0 ports
>>> would be pretty useless.
>>>
>>>> +
>>>> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
>>>> +-------------------------------------------------------------------------------
>>>> +
>>>> +Example:
>>>> +
>>>> + dp-controller {
>>>> + compatible = "samsung,exynos5-dp";
>>>> + reg = <0x145b0000 0x10000>;
>>>> + interrupts = <10 3>;
>>>> + interrupt-parent = <&combiner>;
>>>> + clocks = <&clock 342>;
>>>> + clock-names = "dp";
>>>> +
>>>> + phys = <&dp_phy>;
>>>> + phy-names = "dp";
>>>> +
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x0a>;
>>>> + analogix,lane-count = <4>;
>>>> + };
>>>> diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt b/Documentation/devicetree/bindings/video/exynos_dp.txt
>>>> index 7a3a9cd..177506f 100644
>>>> --- a/Documentation/devicetree/bindings/video/exynos_dp.txt
>>>> +++ b/Documentation/devicetree/bindings/video/exynos_dp.txt
>>>> @@ -31,28 +31,10 @@ Required properties for dp-controller:
>>>> from general PHY binding: the phandle for the PHY device.
>>>> -phy-names:
>>>> from general PHY binding: Should be "dp".
>>>> - -samsung,color-space:
>>>> - input video data format.
>>>> - COLOR_RGB = 0, COLOR_YCBCR422 = 1, COLOR_YCBCR444 = 2
>>>> - -samsung,dynamic-range:
>>>> - dynamic range for input video data.
>>>> - VESA = 0, CEA = 1
>>>> - -samsung,ycbcr-coeff:
>>>> - YCbCr co-efficients for input video.
>>>> - COLOR_YCBCR601 = 0, COLOR_YCBCR709 = 1
>>>> - -samsung,color-depth:
>>>> - number of bits per colour component.
>>>> - COLOR_6 = 0, COLOR_8 = 1, COLOR_10 = 2, COLOR_12 = 3
>>>> - -samsung,link-rate:
>>>> - link rate supported by the panel.
>>>> - LINK_RATE_1_62GBPS = 0x6, LINK_RATE_2_70GBPS = 0x0A
>>>> - -samsung,lane-count:
>>>> - number of lanes supported by the panel.
>>>> - LANE_COUNT1 = 1, LANE_COUNT2 = 2, LANE_COUNT4 = 4
>>>> - - display-timings: timings for the connected panel as described by
>>>> - Documentation/devicetree/bindings/video/display-timing.txt
>>>>
>>>> Optional properties for dp-controller:
>>>> + - display-timings: timings for the connected panel as described by
>>>> + Documentation/devicetree/bindings/video/display-timing.txt
>>>> -interlaced:
>>>> interlace scan mode.
>>>> Progressive if defined, Interlaced if not defined
>>>> @@ -62,14 +44,18 @@ Optional properties for dp-controller:
>>>> -hsync-active-high:
>>>> HSYNC polarity configuration.
>>>> High if defined, Low if not defined
>>>> - -samsung,hpd-gpio:
>>>> - Hotplug detect GPIO.
>>>> - Indicates which GPIO should be used for hotplug
>>>> - detection
>>>> - -video interfaces: Device node can contain video interface port
>>>> - nodes according to [1].
>>>>
>>>> -[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
>>>> +For the below properties, please refer to Analogix DP binding document:
>>>> + * Documentation/devicetree/bindings/drm/bridge/analogix_dp.txt
>>>> + -phys (required)
>>>> + -phy-names (required)
>>>> + -analogix,color-space (required)
>>>> + -analogix,color-depth (required)
>>>> + -analogix,link-rate (required)
>>>> + -analogix,lane-count (required)
>>>> + -analogix,hpd-gpio (optional)
>>>> + -video interfaces (optional)
>>>> +-------------------------------------------------------------------------------
>>>>
>>>> Example:
>>>>
>>>> @@ -88,12 +74,10 @@ SOC specific portion:
>>>>
>>>> Board Specific portion:
>>>> dp-controller {
>>>> - samsung,color-space = <0>;
>>>> - samsung,dynamic-range = <0>;
>>>> - samsung,ycbcr-coeff = <0>;
>>>> - samsung,color-depth = <1>;
>>>> - samsung,link-rate = <0x0a>;
>>>> - samsung,lane-count = <4>;
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x0a>;
>>>> + analogix,lane-count = <4>;
>>>>
>>>> display-timings {
>>>> native-mode = <&lcd_timing>;
>>>> diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
>>>> index 7e728a1..e48798d 100644
>>>> --- a/arch/arm/boot/dts/exynos5250-arndale.dts
>>>> +++ b/arch/arm/boot/dts/exynos5250-arndale.dts
>>>> @@ -119,12 +119,10 @@
>>>>
>>>> &dp {
>>>> status = "okay";
>>>> - samsung,color-space = <0>;
>>>> - samsung,dynamic-range = <0>;
>>>> - samsung,ycbcr-coeff = <0>;
>>>> - samsung,color-depth = <1>;
>>>> - samsung,link-rate = <0x0a>;
>>>> - samsung,lane-count = <4>;
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x0a>;
>>>> + analogix,lane-count = <4>;
>>>> };
>>>>
>>>> &fimd {
>>>> diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
>>>> index 4fe186d..b8c6b8b 100644
>>>> --- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
>>>> +++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
>>>> @@ -75,12 +75,10 @@
>>>> };
>>>>
>>>> &dp {
>>>> - samsung,color-space = <0>;
>>>> - samsung,dynamic-range = <0>;
>>>> - samsung,ycbcr-coeff = <0>;
>>>> - samsung,color-depth = <1>;
>>>> - samsung,link-rate = <0x0a>;
>>>> - samsung,lane-count = <4>;
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x0a>;
>>>> + analogix,lane-count = <4>;
>>>>
>>>> pinctrl-names = "default";
>>>> pinctrl-0 = <&dp_hpd>;
>>>> diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
>>>> index b7f4122..9ce2b89 100644
>>>> --- a/arch/arm/boot/dts/exynos5250-snow.dts
>>>> +++ b/arch/arm/boot/dts/exynos5250-snow.dts
>>>> @@ -239,13 +239,11 @@
>>>> status = "okay";
>>>> pinctrl-names = "default";
>>>> pinctrl-0 = <&dp_hpd>;
>>>> - samsung,color-space = <0>;
>>>> - samsung,dynamic-range = <0>;
>>>> - samsung,ycbcr-coeff = <0>;
>>>> - samsung,color-depth = <1>;
>>>> - samsung,link-rate = <0x0a>;
>>>> - samsung,lane-count = <2>;
>>>> - samsung,hpd-gpio = <&gpx0 7 GPIO_ACTIVE_HIGH>;
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x0a>;
>>>> + analogix,lane-count = <2>;
>>>> + analogix,hpd-gpio = <&gpx0 7 GPIO_ACTIVE_HIGH>;
>>>>
>>>> ports {
>>>> port@0 {
>>>> diff --git a/arch/arm/boot/dts/exynos5250-spring.dts b/arch/arm/boot/dts/exynos5250-spring.dts
>>>> index d03f9b8..9288ae6 100644
>>>> --- a/arch/arm/boot/dts/exynos5250-spring.dts
>>>> +++ b/arch/arm/boot/dts/exynos5250-spring.dts
>>>> @@ -69,13 +69,11 @@
>>>> status = "okay";
>>>> pinctrl-names = "default";
>>>> pinctrl-0 = <&dp_hpd_gpio>;
>>>> - samsung,color-space = <0>;
>>>> - samsung,dynamic-range = <0>;
>>>> - samsung,ycbcr-coeff = <0>;
>>>> - samsung,color-depth = <1>;
>>>> - samsung,link-rate = <0x0a>;
>>>> - samsung,lane-count = <1>;
>>>> - samsung,hpd-gpio = <&gpc3 0 GPIO_ACTIVE_HIGH>;
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x0a>;
>>>> + analogix,lane-count = <1>;
>>>> + analogix,hpd-gpio = <&gpc3 0 GPIO_ACTIVE_HIGH>;
>>>> };
>>>>
>>>> &ehci {
>>>> diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
>>>> index 8f4d76c..695a380 100644
>>>> --- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
>>>> +++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
>>>> @@ -147,13 +147,11 @@
>>>> status = "okay";
>>>> pinctrl-names = "default";
>>>> pinctrl-0 = <&dp_hpd_gpio>;
>>>> - samsung,color-space = <0>;
>>>> - samsung,dynamic-range = <0>;
>>>> - samsung,ycbcr-coeff = <0>;
>>>> - samsung,color-depth = <1>;
>>>> - samsung,link-rate = <0x06>;
>>>> - samsung,lane-count = <2>;
>>>> - samsung,hpd-gpio = <&gpx2 6 0>;
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x06>;
>>>> + analogix,lane-count = <2>;
>>>> + analogix,hpd-gpio = <&gpx2 6 0>;
>>>>
>>>> ports {
>>>> port@0 {
>>>> diff --git a/arch/arm/boot/dts/exynos5420-smdk5420.dts b/arch/arm/boot/dts/exynos5420-smdk5420.dts
>>>> index 98871f9..fd46714 100644
>>>> --- a/arch/arm/boot/dts/exynos5420-smdk5420.dts
>>>> +++ b/arch/arm/boot/dts/exynos5420-smdk5420.dts
>>>> @@ -91,12 +91,10 @@
>>>> &dp {
>>>> pinctrl-names = "default";
>>>> pinctrl-0 = <&dp_hpd>;
>>>> - samsung,color-space = <0>;
>>>> - samsung,dynamic-range = <0>;
>>>> - samsung,ycbcr-coeff = <0>;
>>>> - samsung,color-depth = <1>;
>>>> - samsung,link-rate = <0x0a>;
>>>> - samsung,lane-count = <4>;
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x0a>;
>>>> + analogix,lane-count = <4>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/exynos5800-peach-pi.dts b/arch/arm/boot/dts/exynos5800-peach-pi.dts
>>>> index 7d5b386..54b4c63 100644
>>>> --- a/arch/arm/boot/dts/exynos5800-peach-pi.dts
>>>> +++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts
>>>> @@ -141,13 +141,11 @@
>>>> status = "okay";
>>>> pinctrl-names = "default";
>>>> pinctrl-0 = <&dp_hpd_gpio>;
>>>> - samsung,color-space = <0>;
>>>> - samsung,dynamic-range = <0>;
>>>> - samsung,ycbcr-coeff = <0>;
>>>> - samsung,color-depth = <1>;
>>>> - samsung,link-rate = <0x0a>;
>>>> - samsung,lane-count = <2>;
>>>> - samsung,hpd-gpio = <&gpx2 6 0>;
>>>> + analogix,color-space = <0>;
>>>> + analogix,color-depth = <1>;
>>>> + analogix,link-rate = <0x0a>;
>>>> + analogix,lane-count = <2>;
>>>> + analogix,hpd-gpio = <&gpx2 6 0>;
>>>> panel = <&panel>;
>>>> };
>>>>
>>>> --
>>>> 1.9.1
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> linux-arm-kernel mailing list
>>>> linux-arm-kernel@...ts.infradead.org
>>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>> _______________________________________________
>>> linux-arm-kernel mailing list
>>> linux-arm-kernel@...ts.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
>
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