Re: [PATCH v3 06/14] Documentation: drm/bridge: add document for analogix_dp

[Yakir Yang]

Hi Jingoo,

å 08/24/2015 03:40 PM, Jingoo Han åé:
> On 2015. 8. 24., at AM 9:43, Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> wrote:
> > 2015-08-24 8:23 GMT+09:00 Rob Herring <robherring2@xxxxxxxxx>:
> > > > On Wed, Aug 19, 2015 at 9:50 AM, Yakir Yang <ykk@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx>
> > > > ---
> > > > 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@xxxxxxxxxxxxxxxxxxx
> > > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> > > _______________________________________________
> > > linux-arm-kernel mailing list
> > > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel


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