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Message-ID: <CAL_JsqLz+8RtBucctUj4euXZ3Ac0DvB52N9ONpAerh5T9BiTJg@mail.gmail.com>
Date: Sun, 23 Aug 2015 18:23:14 -0500
From: Rob Herring <robherring2@...il.com>
To: Yakir Yang <ykk@...k-chips.com>
Cc: Heiko Stuebner <heiko@...ech.de>,
Thierry Reding <treding@...dia.com>,
Jingoo Han <jingoohan1@...il.com>,
Fabio Estevam <fabio.estevam@...escale.com>,
Inki Dae <inki.dae@...sung.com>, Joe Perches <joe@...ches.com>,
Russell King <rmk+kernel@....linux.org.uk>,
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>,
linux-rockchip@...ts.infradead.org,
Kishon Vijay Abraham I <kishon@...com>,
David Airlie <airlied@...ux.ie>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
Pawel Moll <pawel.moll@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Doug Anderson <dianders@...gle.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>,
"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>,
Ajay kumar <ajaynumb@...il.com>,
Andy Yan <andy.yan@...k-chips.com>
Subject: Re: [PATCH v3 06/14] Documentation: drm/bridge: add document for analogix_dp
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?
> 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
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