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Message-ID: <55DA8486.1000803@rock-chips.com>
Date: Sun, 23 Aug 2015 21:42:14 -0500
From: Yakir Yang <ykk@...k-chips.com>
To: Krzysztof Kozlowski <k.kozlowski@...sung.com>,
Rob Herring <robherring2@...il.com>
CC: 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,
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>,
Jingoo Han <jingoohan1@...il.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 Krzysztof,
在 08/23/2015 07:43 PM, Krzysztof Kozlowski 写道:
> 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.
Sorry about this one, actually I have add Exynos maintainers in version
1 & version 2,
but lose some maintainers in version 3, I would fix it in bellow versions.
> 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.
Do you mean that I should keep the old properties declare in exynos-dp.txt,
but just mark them as deprecated flag. Let me show same examples, make
me understand your suggest rightly.
1. "samsung,ycbcr-coeff" is abandoned in latest analogix-dp driver,
absolutely
I should not carry this to analogix-dp.txt document. But I should
keep this in
exynos-dp.txt document, and mark them with an little "deprecated" flag.
[Documentation/devicetree/bindings/video/exynos_dp.txt]
Required properties for dp-controller:
[...]
-samsung,ycbcr-coeff (DEPRECATED):
YCbCr co-efficients for input video.
COLOR_YCBCR601 = 0, COLOR_YCBCR709 = 1
Is it right ?
> 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.
So I should separate this patch into two parts, one is name "Document:",
the other is "ARM: dts: ".
Honestly, I don't understand what the "bisectability" means in this case.
> 3. Use proper subject for the patch changing DTS. This is not
> documentation change!
Hmm... when I separate this patch into two parts, I though I can keep
"Documentation" proper subject in this patch, and the other is the "ARM:
dts"
proper subject. Am I right ?
> 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.
Yeah, thanks.
Thanks a lot,
- Yakir
> 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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