* [PATCH 1/9] Doc/DT: Add OMAP DSS DT Bindings
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
@ 2014-02-28 12:20 ` Tomi Valkeinen
2014-02-28 12:20 ` [PATCH 2/9] Doc/DT: Add DT binding documentation for Analog TV Connector Tomi Valkeinen
` (10 subsequent siblings)
11 siblings, 0 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add device tree bindings for OMAP Display Subsystem for the following
SoCs: OMAP2, OMAP3, OMAP4.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../devicetree/bindings/video/ti,omap-dss.txt | 203 +++++++++++++++++++++
.../devicetree/bindings/video/ti,omap2-dss.txt | 54 ++++++
.../devicetree/bindings/video/ti,omap3-dss.txt | 83 +++++++++
.../devicetree/bindings/video/ti,omap4-dss.txt | 111 +++++++++++
.../devicetree/bindings/video/video-ports.txt | 22 +++
5 files changed, 473 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/ti,omap-dss.txt
create mode 100644 Documentation/devicetree/bindings/video/ti,omap2-dss.txt
create mode 100644 Documentation/devicetree/bindings/video/ti,omap3-dss.txt
create mode 100644 Documentation/devicetree/bindings/video/ti,omap4-dss.txt
create mode 100644 Documentation/devicetree/bindings/video/video-ports.txt
diff --git a/Documentation/devicetree/bindings/video/ti,omap-dss.txt b/Documentation/devicetree/bindings/video/ti,omap-dss.txt
new file mode 100644
index 000000000000..a0f2e69b0e3c
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/ti,omap-dss.txt
@@ -0,0 +1,203 @@
+Texas Instruments OMAP Display Subsystem
+========================================
+
+Generic Description
+-------------------
+
+This document is a generic description of the OMAP Display Subsystem bindings.
+Binding details for each OMAP SoC version are described in respective binding
+documentation.
+
+The OMAP Display Subsystem (DSS) hardware consists of DSS Core, DISPC module and
+a number of encoder modules. All DSS versions contain DSS Core and DISPC, but
+the encoder modules vary.
+
+The DSS Core is the parent of the other DSS modules, and manages clock routing,
+integration to the SoC, etc.
+
+DISPC is the display controller, which reads pixels from the memory and outputs
+a RGB pixel stream to encoders.
+
+The encoder modules encode the received RGB pixel stream to a video output like
+HDMI, MIPI DPI, etc.
+
+Video Ports
+-----------
+
+The DSS Core and the encoders have video port outputs. The structure of the
+video ports is described in Documentation/devicetree/bindings/video/video-
+ports.txt, and the properties for the ports and endpoints for each encoder are
+described in the SoC's DSS binding documentation.
+
+The video ports are used to describe the connections to external hardware, like
+panels or external encoders.
+
+Aliases
+-------
+
+The board dts file may define aliases for displays to assign "displayX" style
+name for each display. If no aliases are defined, a semi-random number is used
+for the display.
+
+Example
+-------
+
+A shortened example of the DSS description for OMAP4, with non-relevant parts
+removed, defined in omap4.dtsi:
+
+dss: dss@58000000 {
+ compatible = "ti,omap4-dss", "simple-bus";
+ reg = <0x58000000 0x80>;
+ status = "disabled";
+ ti,hwmods = "dss_core";
+ clocks = <&dss_dss_clk>;
+ clock-names = "fck";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ dispc@58001000 {
+ compatible = "ti,omap4-dispc";
+ reg = <0x58001000 0x1000>;
+ interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+ ti,hwmods = "dss_dispc";
+ clocks = <&dss_dss_clk>;
+ clock-names = "fck";
+ };
+
+ hdmi: encoder@58006000 {
+ compatible = "ti,omap4-hdmi";
+ reg = <0x58006000 0x200>,
+ <0x58006200 0x100>,
+ <0x58006300 0x100>,
+ <0x58006400 0x1000>;
+ reg-names = "wp", "pll", "phy", "core";
+ interrupts = <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
+ status = "disabled";
+ ti,hwmods = "dss_hdmi";
+ clocks = <&dss_48mhz_clk>, <&dss_sys_clk>;
+ clock-names = "fck", "sys_clk";
+ };
+};
+
+A shortened example of the board description for OMAP4 Panda board, defined in
+omap4-panda.dts.
+
+The Panda board has a DVI and a HDMI connector, and the board contains a TFP410
+chip (MIPI DPI to DVI encoder) and a TPD12S015 chip (HDMI ESD protection & level
+shifter). The video pipelines for the connectors are formed as follows:
+
+DSS Core --(MIPI DPI)--> TFP410 --(DVI)--> DVI Connector
+OMAP HDMI --(HDMI)--> TPD12S015 --(HDMI)--> HDMI Connector
+
+/ {
+ aliases {
+ display0 = &dvi0;
+ display1 = &hdmi0;
+ };
+
+ tfp410: encoder@0 {
+ compatible = "ti,tfp410";
+ gpios = <&gpio1 0 GPIO_ACTIVE_LOW>; /* 0, power-down */
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&tfp410_pins>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ tfp410_in: endpoint@0 {
+ remote-endpoint = <&dpi_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ tfp410_out: endpoint@0 {
+ remote-endpoint = <&dvi_connector_in>;
+ };
+ };
+ };
+ };
+
+ dvi0: connector@0 {
+ compatible = "dvi-connector";
+ label = "dvi";
+
+ i2c-bus = <&i2c3>;
+
+ dvi_connector_in: endpoint {
+ remote-endpoint = <&tfp410_out>;
+ };
+ };
+
+ tpd12s015: encoder@1 {
+ compatible = "ti,tpd12s015";
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&tpd12s015_pins>;
+
+ gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>, /* 60, CT CP HPD */
+ <&gpio2 9 GPIO_ACTIVE_HIGH>, /* 41, LS OE */
+ <&gpio2 31 GPIO_ACTIVE_HIGH>; /* 63, HPD */
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ tpd12s015_in: endpoint@0 {
+ remote-endpoint = <&hdmi_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ tpd12s015_out: endpoint@0 {
+ remote-endpoint = <&hdmi_connector_in>;
+ };
+ };
+ };
+ };
+
+ hdmi0: connector@1 {
+ compatible = "hdmi-connector";
+ label = "hdmi";
+
+ hdmi_connector_in: endpoint {
+ remote-endpoint = <&tpd12s015_out>;
+ };
+ };
+};
+
+&dss {
+ status = "ok";
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&dss_dpi_pins>;
+
+ dpi_out: endpoint {
+ remote-endpoint = <&tfp410_in>;
+ data-lines = <24>;
+ };
+};
+
+&hdmi {
+ status = "ok";
+ vdda-supply = <&vdac>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&dss_hdmi_pins>;
+
+ hdmi_out: endpoint {
+ remote-endpoint = <&tpd12s015_in>;
+ };
+};
diff --git a/Documentation/devicetree/bindings/video/ti,omap2-dss.txt b/Documentation/devicetree/bindings/video/ti,omap2-dss.txt
new file mode 100644
index 000000000000..fa8bb2ed1170
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/ti,omap2-dss.txt
@@ -0,0 +1,54 @@
+Texas Instruments OMAP2 Display Subsystem
+=========================================
+
+See Documentation/devicetree/bindings/video/ti,omap-dss.txt for generic
+description about OMAP Display Subsystem bindings.
+
+DSS Core
+--------
+
+Required properties:
+- compatible: "ti,omap2-dss"
+- reg: address and length of the register space
+- ti,hwmods: "dss_core"
+
+Optional nodes:
+- Video port for DPI output
+
+DPI Endpoint required properties:
+- data-lines: number of lines used
+
+
+DISPC
+-----
+
+Required properties:
+- compatible: "ti,omap2-dispc"
+- reg: address and length of the register space
+- ti,hwmods: "dss_dispc"
+- interrupts: the DISPC interrupt
+
+
+RFBI
+----
+
+Required properties:
+- compatible: "ti,omap2-rfbi"
+- reg: address and length of the register space
+- ti,hwmods: "dss_rfbi"
+
+
+VENC
+----
+
+Required properties:
+- compatible: "ti,omap2-venc"
+- reg: address and length of the register space
+- ti,hwmods: "dss_venc"
+- vdda-supply: power supply for DAC
+
+VENC Endpoint required properties:
+
+Required properties:
+- ti,invert-polarity: invert the polarity of the video signal
+- ti,channels: 1 for composite, 2 for s-video
diff --git a/Documentation/devicetree/bindings/video/ti,omap3-dss.txt b/Documentation/devicetree/bindings/video/ti,omap3-dss.txt
new file mode 100644
index 000000000000..0023fa4b1328
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/ti,omap3-dss.txt
@@ -0,0 +1,83 @@
+Texas Instruments OMAP3 Display Subsystem
+=========================================
+
+See Documentation/devicetree/bindings/video/ti,omap-dss.txt for generic
+description about OMAP Display Subsystem bindings.
+
+DSS Core
+--------
+
+Required properties:
+- compatible: "ti,omap3-dss"
+- reg: address and length of the register space
+- ti,hwmods: "dss_core"
+- clocks: handle to fclk
+- clock-names: "fck"
+
+Optional nodes:
+- Video ports:
+ - Port 0: DPI output
+ - Port 1: SDI output
+
+DPI Endpoint required properties:
+- data-lines: number of lines used
+
+SDI Endpoint required properties:
+- datapairs: number of datapairs used
+
+
+DISPC
+-----
+
+Required properties:
+- compatible: "ti,omap3-dispc"
+- reg: address and length of the register space
+- ti,hwmods: "dss_dispc"
+- interrupts: the DISPC interrupt
+- clocks: handle to fclk
+- clock-names: "fck"
+
+
+RFBI
+----
+
+Required properties:
+- compatible: "ti,omap3-rfbi"
+- reg: address and length of the register space
+- ti,hwmods: "dss_rfbi"
+- clocks: handles to fclk and iclk
+- clock-names: "fck", "ick"
+
+
+VENC
+----
+
+Required properties:
+- compatible: "ti,omap3-venc"
+- reg: address and length of the register space
+- ti,hwmods: "dss_venc"
+- vdda-supply: power supply for DAC
+- clocks: handle to fclk
+- clock-names: "fck"
+
+VENC Endpoint required properties:
+- ti,invert-polarity: invert the polarity of the video signal
+- ti,channels: 1 for composite, 2 for s-video
+
+
+DSI
+---
+
+Required properties:
+- compatible: "ti,omap3-dsi"
+- reg: addresses and lengths of the register spaces for 'proto', 'phy' and 'pll'
+- reg-names: "proto", "phy", "pll"
+- interrupts: the DSI interrupt line
+- ti,hwmods: "dss_dsi1"
+- vdd-supply: power supply for DSI
+- clocks: handles to fclk and pll clock
+- clock-names: "fck", "sys_clk"
+
+DSI Endpoint required properties:
+- lanes: list of pin numbers for the DSI lanes: CLK+, CLK-, DATA0+, DATA0-,
+ DATA1+, DATA1-, ...
diff --git a/Documentation/devicetree/bindings/video/ti,omap4-dss.txt b/Documentation/devicetree/bindings/video/ti,omap4-dss.txt
new file mode 100644
index 000000000000..f85d6fcfa705
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/ti,omap4-dss.txt
@@ -0,0 +1,111 @@
+Texas Instruments OMAP4 Display Subsystem
+=========================================
+
+See Documentation/devicetree/bindings/video/ti,omap-dss.txt for generic
+description about OMAP Display Subsystem bindings.
+
+DSS Core
+--------
+
+Required properties:
+- compatible: "ti,omap4-dss"
+- reg: address and length of the register space
+- ti,hwmods: "dss_core"
+- clocks: handle to fclk
+- clock-names: "fck"
+
+Required nodes:
+- DISPC
+
+Optional nodes:
+- DSS Submodules: RFBI, VENC, DSI, HDMI
+- Video port for DPI output
+
+DPI Endpoint required properties:
+- data-lines: number of lines used
+
+
+DISPC
+-----
+
+Required properties:
+- compatible: "ti,omap4-dispc"
+- reg: address and length of the register space
+- ti,hwmods: "dss_dispc"
+- interrupts: the DISPC interrupt
+- clocks: handle to fclk
+- clock-names: "fck"
+
+
+RFBI
+----
+
+Required properties:
+- compatible: "ti,omap4-rfbi"
+- reg: address and length of the register space
+- ti,hwmods: "dss_rfbi"
+- clocks: handles to fclk and iclk
+- clock-names: "fck", "ick"
+
+Optional nodes:
+- Video port for RFBI output
+- RFBI controlled peripherals
+
+
+VENC
+----
+
+Required properties:
+- compatible: "ti,omap4-venc"
+- reg: address and length of the register space
+- ti,hwmods: "dss_venc"
+- vdda-supply: power supply for DAC
+- clocks: handle to fclk
+- clock-names: "fck"
+
+Optional nodes:
+- Video port for VENC output
+
+VENC Endpoint required properties:
+- ti,invert-polarity: invert the polarity of the video signal
+- ti,channels: 1 for composite, 2 for s-video
+
+
+DSI
+---
+
+Required properties:
+- compatible: "ti,omap4-dsi"
+- reg: addresses and lengths of the register spaces for 'proto', 'phy' and 'pll'
+- reg-names: "proto", "phy", "pll"
+- interrupts: the DSI interrupt line
+- ti,hwmods: "dss_dsi1" or "dss_dsi2"
+- vdd-supply: power supply for DSI
+- clocks: handles to fclk and pll clock
+- clock-names: "fck", "sys_clk"
+
+Optional nodes:
+- Video port for DSI output
+- DSI controlled peripherals
+
+DSI Endpoint required properties:
+- lanes: list of pin numbers for the DSI lanes: CLK+, CLK-, DATA0+, DATA0-,
+ DATA1+, DATA1-, ...
+
+
+HDMI
+----
+
+Required properties:
+- compatible: "ti,omap4-hdmi"
+- reg: addresses and lengths of the register spaces for 'wp', 'pll', 'phy',
+ 'core'
+- reg-names: "wp", "pll", "phy", "core"
+- interrupts: the HDMI interrupt line
+- ti,hwmods: "dss_hdmi"
+- vdda-supply: vdda power supply
+- clocks: handles to fclk and pll clock
+- clock-names: "fck", "sys_clk"
+
+Optional nodes:
+- Video port for HDMI output
diff --git a/Documentation/devicetree/bindings/video/video-ports.txt b/Documentation/devicetree/bindings/video/video-ports.txt
new file mode 100644
index 000000000000..dad4c436caae
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/video-ports.txt
@@ -0,0 +1,22 @@
+Video Ports
+===========
+
+The video port bindings used for display devices is a superset of the v4l2 video
+ports described here:
+
+Documentation/devicetree/bindings/media/video-interfaces.txt
+
+The only difference is a more compact way to describe devices with only one
+endpoint. In cases like that, the 'ports' and 'port' nodes are not needed. For
+example, a DPI panel with a single input endpoint:
+
+lcd0: display@0 {
+ compatible = "samsung,lte430wq-f0c", "panel-dpi";
+
+ lcd_in: endpoint {
+ remote-endpoint = <&dpi_out>;
+ };
+};
+
+The rest of the bindings are the same as in v4l2 video port bindings and not
+described here.
--
1.8.3.2
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^ permalink raw reply related [flat|nested] 71+ messages in thread* [PATCH 2/9] Doc/DT: Add DT binding documentation for Analog TV Connector
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
2014-02-28 12:20 ` [PATCH 1/9] Doc/DT: Add OMAP DSS DT Bindings Tomi Valkeinen
@ 2014-02-28 12:20 ` Tomi Valkeinen
2014-02-28 12:20 ` [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector Tomi Valkeinen
` (9 subsequent siblings)
11 siblings, 0 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add DT binding documentation for Analog TV Connector.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../bindings/video/analog-tv-connector.txt | 23 ++++++++++++++++++++++
1 file changed, 23 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/analog-tv-connector.txt
diff --git a/Documentation/devicetree/bindings/video/analog-tv-connector.txt b/Documentation/devicetree/bindings/video/analog-tv-connector.txt
new file mode 100644
index 000000000000..d6be373d8705
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/analog-tv-connector.txt
@@ -0,0 +1,23 @@
+Analog TV Connector
+===================
+
+Required properties:
+- compatible: "composite-connector" or "svideo-connector"
+
+Optional properties:
+- label: a symbolic name for the connector
+
+Required nodes:
+- Video port for TV input
+
+Example
+-------
+
+tv: connector {
+ compatible = "composite-connector";
+ label = "tv";
+
+ tv_connector_in: endpoint {
+ remote-endpoint = <&venc_out>;
+ };
+};
--
1.8.3.2
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^ permalink raw reply related [flat|nested] 71+ messages in thread* [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
2014-02-28 12:20 ` [PATCH 1/9] Doc/DT: Add OMAP DSS DT Bindings Tomi Valkeinen
2014-02-28 12:20 ` [PATCH 2/9] Doc/DT: Add DT binding documentation for Analog TV Connector Tomi Valkeinen
@ 2014-02-28 12:20 ` Tomi Valkeinen
2014-02-28 13:43 ` Philipp Zabel
[not found] ` <1393590016-9361-4-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
2014-02-28 12:20 ` [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector Tomi Valkeinen
` (8 subsequent siblings)
11 siblings, 2 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add DT binding documentation for DVI Connector.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../devicetree/bindings/video/dvi-connector.txt | 26 ++++++++++++++++++++++
1 file changed, 26 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/dvi-connector.txt
diff --git a/Documentation/devicetree/bindings/video/dvi-connector.txt b/Documentation/devicetree/bindings/video/dvi-connector.txt
new file mode 100644
index 000000000000..6a0aff866c78
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/dvi-connector.txt
@@ -0,0 +1,26 @@
+DVI Connector
+==============
+
+Required properties:
+- compatible: "dvi-connector"
+
+Optional properties:
+- label: a symbolic name for the connector
+- i2c-bus: phandle to the i2c bus that is connected to DVI DDC
+
+Required nodes:
+- Video port for DVI input
+
+Example
+-------
+
+dvi0: connector@0 {
+ compatible = "dvi-connector";
+ label = "dvi";
+
+ i2c-bus = <&i2c3>;
+
+ dvi_connector_in: endpoint {
+ remote-endpoint = <&tfp410_out>;
+ };
+};
--
1.8.3.2
--
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^ permalink raw reply related [flat|nested] 71+ messages in thread* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
2014-02-28 12:20 ` [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector Tomi Valkeinen
@ 2014-02-28 13:43 ` Philipp Zabel
2014-03-03 6:25 ` Tomi Valkeinen
[not found] ` <1393590016-9361-4-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
1 sibling, 1 reply; 71+ messages in thread
From: Philipp Zabel @ 2014-02-28 13:43 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, dri-devel,
Andrzej Hajda, Laurent Pinchart, linux-arm-kernel,
Sebastian Hesselbarth
Hi Tomi,
Am Freitag, den 28.02.2014, 14:20 +0200 schrieb Tomi Valkeinen:
> Add DT binding documentation for DVI Connector.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Reviewed-by: Archit Taneja <archit@ti.com>
> ---
> .../devicetree/bindings/video/dvi-connector.txt | 26 ++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/video/dvi-connector.txt
>
> diff --git a/Documentation/devicetree/bindings/video/dvi-connector.txt b/Documentation/devicetree/bindings/video/dvi-connector.txt
> new file mode 100644
> index 000000000000..6a0aff866c78
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/dvi-connector.txt
> @@ -0,0 +1,26 @@
> +DVI Connector
> +==============
> +
> +Required properties:
> +- compatible: "dvi-connector"
> +
> +Optional properties:
> +- label: a symbolic name for the connector
> +- i2c-bus: phandle to the i2c bus that is connected to DVI DDC
For the i.MX bindings I had called this property 'ddc', but
Documentation/devicetree/bindings/panel/simple-panel.txt already
uses 'ddc-i2c-bus'. We should definitely standardize this.
> +Required nodes:
> +- Video port for DVI input
> +
> +Example
> +-------
> +
> +dvi0: connector@0 {
> + compatible = "dvi-connector";
> + label = "dvi";
> +
> + i2c-bus = <&i2c3>;
> +
> + dvi_connector_in: endpoint {
> + remote-endpoint = <&tfp410_out>;
> + };
> +};
regards
Philipp
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
2014-02-28 13:43 ` Philipp Zabel
@ 2014-03-03 6:25 ` Tomi Valkeinen
0 siblings, 0 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-03 6:25 UTC (permalink / raw)
To: Philipp Zabel
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, Sascha Hauer,
Tomasz Figa, dri-devel, Inki Dae, Andrzej Hajda, Rob Clark,
Thierry Reding, Laurent Pinchart, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1294 bytes --]
On 28/02/14 15:43, Philipp Zabel wrote:
> Hi Tomi,
>
> Am Freitag, den 28.02.2014, 14:20 +0200 schrieb Tomi Valkeinen:
>> Add DT binding documentation for DVI Connector.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> Reviewed-by: Archit Taneja <archit@ti.com>
>> ---
>> .../devicetree/bindings/video/dvi-connector.txt | 26 ++++++++++++++++++++++
>> 1 file changed, 26 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/video/dvi-connector.txt
>>
>> diff --git a/Documentation/devicetree/bindings/video/dvi-connector.txt b/Documentation/devicetree/bindings/video/dvi-connector.txt
>> new file mode 100644
>> index 000000000000..6a0aff866c78
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/video/dvi-connector.txt
>> @@ -0,0 +1,26 @@
>> +DVI Connector
>> +==============
>> +
>> +Required properties:
>> +- compatible: "dvi-connector"
>> +
>> +Optional properties:
>> +- label: a symbolic name for the connector
>> +- i2c-bus: phandle to the i2c bus that is connected to DVI DDC
>
> For the i.MX bindings I had called this property 'ddc', but
> Documentation/devicetree/bindings/panel/simple-panel.txt already
> uses 'ddc-i2c-bus'. We should definitely standardize this.
I like 'ddc-i2c-bus'.
Tomi
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^ permalink raw reply [flat|nested] 71+ messages in thread
[parent not found: <1393590016-9361-4-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>]
* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
[not found] ` <1393590016-9361-4-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
@ 2014-02-28 15:59 ` Russell King - ARM Linux
2014-02-28 16:12 ` Tomi Valkeinen
[not found] ` <20140228155937.GQ21483-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
0 siblings, 2 replies; 71+ messages in thread
From: Russell King - ARM Linux @ 2014-02-28 15:59 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Philipp Zabel,
Laurent Pinchart, Sascha Hauer, Sebastian Hesselbarth, Rob Clark,
Inki Dae, Andrzej Hajda, Tomasz Figa, Thierry Reding
On Fri, Feb 28, 2014 at 02:20:10PM +0200, Tomi Valkeinen wrote:
> Add DT binding documentation for DVI Connector.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
> Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
> ---
> .../devicetree/bindings/video/dvi-connector.txt | 26 ++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/video/dvi-connector.txt
>
> diff --git a/Documentation/devicetree/bindings/video/dvi-connector.txt b/Documentation/devicetree/bindings/video/dvi-connector.txt
> new file mode 100644
> index 000000000000..6a0aff866c78
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/dvi-connector.txt
> @@ -0,0 +1,26 @@
> +DVI Connector
> +==============
> +
> +Required properties:
> +- compatible: "dvi-connector"
> +
> +Optional properties:
> +- label: a symbolic name for the connector
> +- i2c-bus: phandle to the i2c bus that is connected to DVI DDC
> +
> +Required nodes:
> +- Video port for DVI input
> +
> +Example
> +-------
> +
> +dvi0: connector@0 {
> + compatible = "dvi-connector";
> + label = "dvi";
> +
> + i2c-bus = <&i2c3>;
> +
> + dvi_connector_in: endpoint {
> + remote-endpoint = <&tfp410_out>;
> + };
> +};
This looks far too simplistic. There are different classes of DVI
connector - there is:
DVI A - analogue only
DVI D - digital only (single and dual link)
DVI I - both (single and dual digital link)
DRM at least makes a distinction between these three classes, and this
disctinction is part of the user API. How would a display system know
which kind of DVI connector is wired up on the board from this DT
description?
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^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
2014-02-28 15:59 ` Russell King - ARM Linux
@ 2014-02-28 16:12 ` Tomi Valkeinen
[not found] ` <5310B567.7040605-l0cyMroinI0@public.gmane.org>
[not found] ` <20140228155937.GQ21483-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
1 sibling, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 16:12 UTC (permalink / raw)
To: Russell King - ARM Linux
Cc: devicetree, linux-fbdev, Sascha Hauer, Tomasz Figa, dri-devel,
Inki Dae, Andrzej Hajda, Rob Clark, Thierry Reding,
Laurent Pinchart, Philipp Zabel, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1094 bytes --]
On 28/02/14 17:59, Russell King - ARM Linux wrote:
>> +dvi0: connector@0 {
>> + compatible = "dvi-connector";
>> + label = "dvi";
>> +
>> + i2c-bus = <&i2c3>;
>> +
>> + dvi_connector_in: endpoint {
>> + remote-endpoint = <&tfp410_out>;
>> + };
>> +};
>
> This looks far too simplistic. There are different classes of DVI
> connector - there is:
>
> DVI A - analogue only
> DVI D - digital only (single and dual link)
> DVI I - both (single and dual digital link)
>
> DRM at least makes a distinction between these three classes, and this
> disctinction is part of the user API. How would a display system know
> which kind of DVI connector is wired up on the board from this DT
> description?
Yes, I think that's a valid change. But do we also need to specify
single/dual link, in addition to the three types?
I guess the compatible string is the easiest way for differentation, at
least for the three main types, i.e. "dvi-d-connector" etc.
"dvi-d-1l-connector" and "dvi-d-2l-connector" for the single/dual link?
That looks a bit funny.
Tomi
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linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread[parent not found: <20140228155937.GQ21483-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>]
* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
[not found] ` <20140228155937.GQ21483-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
@ 2014-02-28 16:25 ` Philipp Zabel
[not found] ` <1393604717.3802.61.camel-+qGW7pzALmz7o/J7KWpOmN53zsg1cpMQ@public.gmane.org>
2014-03-11 6:43 ` Tomi Valkeinen
0 siblings, 2 replies; 71+ messages in thread
From: Philipp Zabel @ 2014-02-28 16:25 UTC (permalink / raw)
To: Russell King - ARM Linux
Cc: Tomi Valkeinen, linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
Laurent Pinchart, Sascha Hauer, Sebastian Hesselbarth, Rob Clark,
Inki Dae, Andrzej Hajda, Tomasz Figa, Thierry Reding
Am Freitag, den 28.02.2014, 15:59 +0000 schrieb Russell King - ARM
Linux:
> On Fri, Feb 28, 2014 at 02:20:10PM +0200, Tomi Valkeinen wrote:
> > Add DT binding documentation for DVI Connector.
> >
> > Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
> > Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
> > ---
> > .../devicetree/bindings/video/dvi-connector.txt | 26 ++++++++++++++++++++++
> > 1 file changed, 26 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/video/dvi-connector.txt
> >
> > diff --git a/Documentation/devicetree/bindings/video/dvi-connector.txt b/Documentation/devicetree/bindings/video/dvi-connector.txt
> > new file mode 100644
> > index 000000000000..6a0aff866c78
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/video/dvi-connector.txt
> > @@ -0,0 +1,26 @@
> > +DVI Connector
> > +==============
> > +
> > +Required properties:
> > +- compatible: "dvi-connector"
> > +
> > +Optional properties:
> > +- label: a symbolic name for the connector
> > +- i2c-bus: phandle to the i2c bus that is connected to DVI DDC
> > +
> > +Required nodes:
> > +- Video port for DVI input
> > +
> > +Example
> > +-------
> > +
> > +dvi0: connector@0 {
> > + compatible = "dvi-connector";
> > + label = "dvi";
> > +
> > + i2c-bus = <&i2c3>;
> > +
> > + dvi_connector_in: endpoint {
> > + remote-endpoint = <&tfp410_out>;
> > + };
> > +};
>
> This looks far too simplistic. There are different classes of DVI
> connector - there is:
>
> DVI A - analogue only
> DVI D - digital only (single and dual link)
> DVI I - both (single and dual digital link)
>
> DRM at least makes a distinction between these three classes, and this
> disctinction is part of the user API. How would a display system know
> which kind of DVI connector is wired up on the board from this DT
> description?
Maybe this could be inferred from the sources connected to it. For
example a i.MX5 board with the SoC internal TV Encoder and an external
SiI902x HDMI encoder connected to the same DVI I connector:
ipu {
port@2 {
ipu_di0_disp0: endpoint {
remote-endpoint = <&sii902x_in>;
};
};
port@3 {
ipu_di1_tve: endpoint {
remote-endpoint = <&tve_in>;
};
};
};
&sii902x {
compatible = "si,sii9022";
port@0 {
sii902x_in: endpoint {
remote-endpoint = <&ipu_di0>;
};
};
port@1 {
sii902x_out: endpoint {
remote-endpoint = <&dvi_d_in>;
};
};
};
&tve {
compatible = "fsl,imx53-tve";
port@0 {
tve_in: endpoint {
remote-endpoint = <&ipu_di1>;
};
};
port@1 {
tve_out: endpoint {
remote-endpoint = <&dvi_a_in>;
};
};
};
dvi-connector {
compatible = "dvi-connector";
ddc-i2c-bus = <&i2c3>;
port {
dvi_d_in: endpoint@0 {
remote-endpoint = <&sii902x_out>;
};
dvi_a_in: endpoint@1 {
remote-endpoint = <&tve_out>;
};
};
};
It should be possible to let the connector know that those two endpoints
are connected to a TMDS source and to a VGA source, respectively.
regards
Philipp
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^ permalink raw reply [flat|nested] 71+ messages in thread[parent not found: <1393604717.3802.61.camel-+qGW7pzALmz7o/J7KWpOmN53zsg1cpMQ@public.gmane.org>]
* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
[not found] ` <1393604717.3802.61.camel-+qGW7pzALmz7o/J7KWpOmN53zsg1cpMQ@public.gmane.org>
@ 2014-03-10 21:45 ` Rob Herring
2014-03-11 6:39 ` Tomi Valkeinen
0 siblings, 1 reply; 71+ messages in thread
From: Rob Herring @ 2014-03-10 21:45 UTC (permalink / raw)
To: Philipp Zabel
Cc: Russell King - ARM Linux, Tomi Valkeinen,
linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Laurent Pinchart, Sascha Hauer, Sebastian Hesselbarth, Rob Clark,
Inki Dae, Andrzej Hajda, Tomasz Figa, Thierry Reding
On Fri, Feb 28, 2014 at 10:25 AM, Philipp Zabel <p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> wrote:
> Am Freitag, den 28.02.2014, 15:59 +0000 schrieb Russell King - ARM
> Linux:
>> On Fri, Feb 28, 2014 at 02:20:10PM +0200, Tomi Valkeinen wrote:
>> > Add DT binding documentation for DVI Connector.
>> >
>> > Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
>> > Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
>> > ---
>> > .../devicetree/bindings/video/dvi-connector.txt | 26 ++++++++++++++++++++++
>> > 1 file changed, 26 insertions(+)
>> > create mode 100644 Documentation/devicetree/bindings/video/dvi-connector.txt
>> >
>> > diff --git a/Documentation/devicetree/bindings/video/dvi-connector.txt b/Documentation/devicetree/bindings/video/dvi-connector.txt
>> > new file mode 100644
>> > index 000000000000..6a0aff866c78
>> > --- /dev/null
>> > +++ b/Documentation/devicetree/bindings/video/dvi-connector.txt
>> > @@ -0,0 +1,26 @@
>> > +DVI Connector
>> > +==============
>> > +
>> > +Required properties:
>> > +- compatible: "dvi-connector"
>> > +
>> > +Optional properties:
>> > +- label: a symbolic name for the connector
>> > +- i2c-bus: phandle to the i2c bus that is connected to DVI DDC
>> > +
>> > +Required nodes:
>> > +- Video port for DVI input
>> > +
>> > +Example
>> > +-------
>> > +
>> > +dvi0: connector@0 {
>> > + compatible = "dvi-connector";
>> > + label = "dvi";
>> > +
>> > + i2c-bus = <&i2c3>;
>> > +
>> > + dvi_connector_in: endpoint {
>> > + remote-endpoint = <&tfp410_out>;
>> > + };
>> > +};
>>
>> This looks far too simplistic. There are different classes of DVI
>> connector - there is:
>>
>> DVI A - analogue only
>> DVI D - digital only (single and dual link)
>> DVI I - both (single and dual digital link)
>>
>> DRM at least makes a distinction between these three classes, and this
>> disctinction is part of the user API. How would a display system know
>> which kind of DVI connector is wired up on the board from this DT
>> description?
>
> Maybe this could be inferred from the sources connected to it. For
> example a i.MX5 board with the SoC internal TV Encoder and an external
> SiI902x HDMI encoder connected to the same DVI I connector:
>
> ipu {
> port@2 {
> ipu_di0_disp0: endpoint {
> remote-endpoint = <&sii902x_in>;
> };
> };
> port@3 {
> ipu_di1_tve: endpoint {
> remote-endpoint = <&tve_in>;
> };
> };
> };
>
> &sii902x {
> compatible = "si,sii9022";
>
> port@0 {
> sii902x_in: endpoint {
> remote-endpoint = <&ipu_di0>;
> };
> };
> port@1 {
> sii902x_out: endpoint {
> remote-endpoint = <&dvi_d_in>;
> };
> };
> };
>
> &tve {
> compatible = "fsl,imx53-tve";
> port@0 {
> tve_in: endpoint {
> remote-endpoint = <&ipu_di1>;
> };
> };
> port@1 {
> tve_out: endpoint {
> remote-endpoint = <&dvi_a_in>;
> };
> };
> };
>
> dvi-connector {
> compatible = "dvi-connector";
> ddc-i2c-bus = <&i2c3>;
>
> port {
> dvi_d_in: endpoint@0 {
> remote-endpoint = <&sii902x_out>;
> };
> dvi_a_in: endpoint@1 {
> remote-endpoint = <&tve_out>;
> };
> };
> };
>
> It should be possible to let the connector know that those two endpoints
> are connected to a TMDS source and to a VGA source, respectively.
I like this proposal over the others. Although, would dual link be a
single endpoint or 2 endpoints? How would you differentiate that?
The port node seems a bit pointless.
Rob
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^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
2014-03-10 21:45 ` Rob Herring
@ 2014-03-11 6:39 ` Tomi Valkeinen
2014-03-11 8:00 ` Geert Uytterhoeven
0 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-11 6:39 UTC (permalink / raw)
To: Rob Herring, Philipp Zabel
Cc: devicetree@vger.kernel.org, linux-fbdev, Russell King - ARM Linux,
Sascha Hauer, Tomasz Figa, dri-devel, Inki Dae, Andrzej Hajda,
Rob Clark, Thierry Reding, Laurent Pinchart,
linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1038 bytes --]
On 10/03/14 23:45, Rob Herring wrote:
> I like this proposal over the others. Although, would dual link be a
I don't like inferring the information. With the above, you can't find
out that the DVI connector has digital and analog support before all the
drivers are loaded.
> single endpoint or 2 endpoints? How would you differentiate that?
Hmm, well endpoints for a single port are exclusive. So it's either a
single port and a single endpoint, or two ports and two endpoints. I
think dual link has to be single port & endpoint, as the TMDS links need
to be driven together as a single bus.
And dual-link is not really "two links". DVI dual-link means 1 clock
lane and 6 data lanes, compared to 1 clock lane and 3 data lanes for
single-link.
> The port node seems a bit pointless.
There's another thread discussing the ports and endpoints.
The port node represents, for example, the pins for the connection for
that device. And an endpoint-endpoint link represents wires between two
ports.
Tomi
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
2014-03-11 6:39 ` Tomi Valkeinen
@ 2014-03-11 8:00 ` Geert Uytterhoeven
2014-03-11 8:04 ` Tomi Valkeinen
0 siblings, 1 reply; 71+ messages in thread
From: Geert Uytterhoeven @ 2014-03-11 8:00 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree@vger.kernel.org, Linux Fbdev development list,
Russell King - ARM Linux, DRI Development, Andrzej Hajda,
Rob Herring, Laurent Pinchart,
linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth
On Tue, Mar 11, 2014 at 7:39 AM, Tomi Valkeinen <tomi.valkeinen@ti.com> wrote:
> On 10/03/14 23:45, Rob Herring wrote:
>> I like this proposal over the others. Although, would dual link be a
>
> I don't like inferring the information. With the above, you can't find
> out that the DVI connector has digital and analog support before all the
> drivers are loaded.
>
>> single endpoint or 2 endpoints? How would you differentiate that?
>
> Hmm, well endpoints for a single port are exclusive. So it's either a
> single port and a single endpoint, or two ports and two endpoints. I
> think dual link has to be single port & endpoint, as the TMDS links need
> to be driven together as a single bus.
>
> And dual-link is not really "two links". DVI dual-link means 1 clock
> lane and 6 data lanes, compared to 1 clock lane and 3 data lanes for
> single-link.
What about having a property for the number of data lanes?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
2014-03-11 8:00 ` Geert Uytterhoeven
@ 2014-03-11 8:04 ` Tomi Valkeinen
2014-03-11 11:19 ` Philipp Zabel
0 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-11 8:04 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: devicetree@vger.kernel.org, Linux Fbdev development list,
Russell King - ARM Linux, Sascha Hauer, Tomasz Figa,
DRI Development, Inki Dae, Andrzej Hajda, Rob Clark,
Thierry Reding, Laurent Pinchart, Philipp Zabel,
linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth
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On 11/03/14 10:00, Geert Uytterhoeven wrote:
> On Tue, Mar 11, 2014 at 7:39 AM, Tomi Valkeinen <tomi.valkeinen@ti.com> wrote:
>> On 10/03/14 23:45, Rob Herring wrote:
>>> I like this proposal over the others. Although, would dual link be a
>>
>> I don't like inferring the information. With the above, you can't find
>> out that the DVI connector has digital and analog support before all the
>> drivers are loaded.
>>
>>> single endpoint or 2 endpoints? How would you differentiate that?
>>
>> Hmm, well endpoints for a single port are exclusive. So it's either a
>> single port and a single endpoint, or two ports and two endpoints. I
>> think dual link has to be single port & endpoint, as the TMDS links need
>> to be driven together as a single bus.
>>
>> And dual-link is not really "two links". DVI dual-link means 1 clock
>> lane and 6 data lanes, compared to 1 clock lane and 3 data lanes for
>> single-link.
>
> What about having a property for the number of data lanes?
That was already suggested by Philipp in this thread. I don't see
anything wrong with that, but I don't really see benefit either.
"dual-link" is a standard term for 6 data lanes for the DVI connector.
And the choices are 3 or 6 data lanes, nothing else.
Tomi
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
2014-03-11 8:04 ` Tomi Valkeinen
@ 2014-03-11 11:19 ` Philipp Zabel
0 siblings, 0 replies; 71+ messages in thread
From: Philipp Zabel @ 2014-03-11 11:19 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree@vger.kernel.org, Linux Fbdev development list,
Russell King - ARM Linux, DRI Development, Andrzej Hajda,
Rob Herring, Laurent Pinchart, Geert Uytterhoeven,
linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth
Am Dienstag, den 11.03.2014, 10:04 +0200 schrieb Tomi Valkeinen:
> On 11/03/14 10:00, Geert Uytterhoeven wrote:
> > On Tue, Mar 11, 2014 at 7:39 AM, Tomi Valkeinen <tomi.valkeinen@ti.com> wrote:
> >> On 10/03/14 23:45, Rob Herring wrote:
> >>> I like this proposal over the others. Although, would dual link be a
> >>
> >> I don't like inferring the information. With the above, you can't find
> >> out that the DVI connector has digital and analog support before all the
> >> drivers are loaded.
> >>
> >>> single endpoint or 2 endpoints? How would you differentiate that?
> >>
> >> Hmm, well endpoints for a single port are exclusive. So it's either a
> >> single port and a single endpoint, or two ports and two endpoints. I
> >> think dual link has to be single port & endpoint, as the TMDS links need
> >> to be driven together as a single bus.
> >>
> >> And dual-link is not really "two links". DVI dual-link means 1 clock
> >> lane and 6 data lanes, compared to 1 clock lane and 3 data lanes for
> >> single-link.
> >
> > What about having a property for the number of data lanes?
>
> That was already suggested by Philipp in this thread. I don't see
> anything wrong with that, but I don't really see benefit either.
> "dual-link" is a standard term for 6 data lanes for the DVI connector.
> And the choices are 3 or 6 data lanes, nothing else.
The number of lanes of a DisplayPort connector could be 1 to 4. Also,
there's dual-mode DP which can use four lanes to drive
somewhat-like-HDMI single link TMDS signals.
regards
Philipp
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector
2014-02-28 16:25 ` Philipp Zabel
[not found] ` <1393604717.3802.61.camel-+qGW7pzALmz7o/J7KWpOmN53zsg1cpMQ@public.gmane.org>
@ 2014-03-11 6:43 ` Tomi Valkeinen
1 sibling, 0 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-11 6:43 UTC (permalink / raw)
To: Philipp Zabel
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, Sascha Hauer,
Tomasz Figa, dri-devel, Inki Dae, Andrzej Hajda, Rob Clark,
Thierry Reding, Laurent Pinchart, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 887 bytes --]
On 28/02/14 18:25, Philipp Zabel wrote:
> dvi-connector {
> compatible = "dvi-connector";
> ddc-i2c-bus = <&i2c3>;
>
> port {
> dvi_d_in: endpoint@0 {
> remote-endpoint = <&sii902x_out>;
> };
> dvi_a_in: endpoint@1 {
> remote-endpoint = <&tve_out>;
> };
> };
> };
>
> It should be possible to let the connector know that those two endpoints
> are connected to a TMDS source and to a VGA source, respectively.
I have not worked with boards that would have the analog part, so just
wondering about the above.
The above would mean that either digital or analog is in use, but not
both. Was that the intention? From the connector's perspective, the
analog and digital pins are separate, and I think they can be used at
the same time. That kind of sounds like the analog and digital pins
should be represented as separate ports.
Tomi
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (2 preceding siblings ...)
2014-02-28 12:20 ` [PATCH 3/9] Doc/DT: Add DT binding documentation for DVI Connector Tomi Valkeinen
@ 2014-02-28 12:20 ` Tomi Valkeinen
2014-02-28 16:06 ` Russell King - ARM Linux
2014-02-28 12:20 ` [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel Tomi Valkeinen
` (7 subsequent siblings)
11 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add DT binding documentation for HDMI Connector.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../devicetree/bindings/video/hdmi-connector.txt | 23 ++++++++++++++++++++++
1 file changed, 23 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/hdmi-connector.txt
diff --git a/Documentation/devicetree/bindings/video/hdmi-connector.txt b/Documentation/devicetree/bindings/video/hdmi-connector.txt
new file mode 100644
index 000000000000..5d25f6a432bb
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/hdmi-connector.txt
@@ -0,0 +1,23 @@
+HDMI Connector
+==============
+
+Required properties:
+- compatible: "hdmi-connector"
+
+Optional properties:
+- label: a symbolic name for the connector
+
+Required nodes:
+- Video port for HDMI input
+
+Example
+-------
+
+hdmi0: connector@1 {
+ compatible = "hdmi-connector";
+ label = "hdmi";
+
+ hdmi_connector_in: endpoint {
+ remote-endpoint = <&tpd12s015_out>;
+ };
+};
--
1.8.3.2
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] 71+ messages in thread* Re: [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector
2014-02-28 12:20 ` [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector Tomi Valkeinen
@ 2014-02-28 16:06 ` Russell King - ARM Linux
2014-02-28 16:15 ` Tomi Valkeinen
2014-03-04 12:59 ` Daniel Vetter
0 siblings, 2 replies; 71+ messages in thread
From: Russell King - ARM Linux @ 2014-02-28 16:06 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, dri-devel, Andrzej Hajda,
Laurent Pinchart, linux-arm-kernel, Sebastian Hesselbarth
On Fri, Feb 28, 2014 at 02:20:11PM +0200, Tomi Valkeinen wrote:
> Add DT binding documentation for HDMI Connector.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Reviewed-by: Archit Taneja <archit@ti.com>
> ---
> .../devicetree/bindings/video/hdmi-connector.txt | 23 ++++++++++++++++++++++
> 1 file changed, 23 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/video/hdmi-connector.txt
>
> diff --git a/Documentation/devicetree/bindings/video/hdmi-connector.txt b/Documentation/devicetree/bindings/video/hdmi-connector.txt
> new file mode 100644
> index 000000000000..5d25f6a432bb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/hdmi-connector.txt
> @@ -0,0 +1,23 @@
> +HDMI Connector
> +==============
> +
> +Required properties:
> +- compatible: "hdmi-connector"
> +
> +Optional properties:
> +- label: a symbolic name for the connector
> +
> +Required nodes:
> +- Video port for HDMI input
> +
> +Example
> +-------
> +
> +hdmi0: connector@1 {
> + compatible = "hdmi-connector";
> + label = "hdmi";
> +
> + hdmi_connector_in: endpoint {
> + remote-endpoint = <&tpd12s015_out>;
> + };
> +};
It seems rather weird to have DVI connectors having an optional I2C
property, but HDMI (which augments DVI) not having that as at least an
optional property.
I can quite well see the iMX HDMI support needing an i2c bus here.
Also, HDMI has two connector standards - type A and type B, much like
the single vs dual link of DVI. Again, DRM exposes this to userspace.
--
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector
2014-02-28 16:06 ` Russell King - ARM Linux
@ 2014-02-28 16:15 ` Tomi Valkeinen
2014-02-28 16:34 ` Russell King - ARM Linux
2014-03-04 12:59 ` Daniel Vetter
1 sibling, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 16:15 UTC (permalink / raw)
To: Russell King - ARM Linux
Cc: devicetree, linux-fbdev, Sascha Hauer, Tomasz Figa, dri-devel,
Inki Dae, Andrzej Hajda, Rob Clark, Thierry Reding,
Laurent Pinchart, Philipp Zabel, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1093 bytes --]
On 28/02/14 18:06, Russell King - ARM Linux wrote:
>> +hdmi0: connector@1 {
>> + compatible = "hdmi-connector";
>> + label = "hdmi";
>> +
>> + hdmi_connector_in: endpoint {
>> + remote-endpoint = <&tpd12s015_out>;
>> + };
>> +};
>
> It seems rather weird to have DVI connectors having an optional I2C
> property, but HDMI (which augments DVI) not having that as at least an
> optional property.
I have added only the properties that I have used. I did think about the
i2c for HDMI also, but thought that I don't use it, and so can't test
it, and so I could well create a bad binding.
And, as I don't see any issue in adding it later, when someone uses it,
I decided to leave it out.
> I can quite well see the iMX HDMI support needing an i2c bus here.
>
> Also, HDMI has two connector standards - type A and type B, much like
> the single vs dual link of DVI. Again, DRM exposes this to userspace.
True, but isn't that just a form factor? No functional differences? But
I agree, we can add the two types here also to the compatible string.
Tomi
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^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector
2014-02-28 16:15 ` Tomi Valkeinen
@ 2014-02-28 16:34 ` Russell King - ARM Linux
2014-03-01 18:58 ` Geert Uytterhoeven
0 siblings, 1 reply; 71+ messages in thread
From: Russell King - ARM Linux @ 2014-02-28 16:34 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, dri-devel, Andrzej Hajda,
Laurent Pinchart, linux-arm-kernel, Sebastian Hesselbarth
On Fri, Feb 28, 2014 at 06:15:05PM +0200, Tomi Valkeinen wrote:
> On 28/02/14 18:06, Russell King - ARM Linux wrote:
>
> >> +hdmi0: connector@1 {
> >> + compatible = "hdmi-connector";
> >> + label = "hdmi";
> >> +
> >> + hdmi_connector_in: endpoint {
> >> + remote-endpoint = <&tpd12s015_out>;
> >> + };
> >> +};
> >
> > It seems rather weird to have DVI connectors having an optional I2C
> > property, but HDMI (which augments DVI) not having that as at least an
> > optional property.
>
> I have added only the properties that I have used. I did think about the
> i2c for HDMI also, but thought that I don't use it, and so can't test
> it, and so I could well create a bad binding.
>
> And, as I don't see any issue in adding it later, when someone uses it,
> I decided to leave it out.
>
> > I can quite well see the iMX HDMI support needing an i2c bus here.
> >
> > Also, HDMI has two connector standards - type A and type B, much like
> > the single vs dual link of DVI. Again, DRM exposes this to userspace.
>
> True, but isn't that just a form factor? No functional differences? But
> I agree, we can add the two types here also to the compatible string.
HDMI A is 19 pins carrying TMDS channels 0-2. HDMI B is 29 pins
carrying TMDS channels 0-5. So, the difference is the same as the
single vs dual link on DVI-D/I connectors.
There's actually three HDMI connectors:
All three connectors carry all required HDMI signals, including a TMDS
link. The Type B connector is slightly larger and carries a second TMDS
link, which is necessary to support very high resolution displays using
dual link. The Type C connector carries the same signals as the Type A
but is more compact and intended for mobile applications.
So, Type C and Type A are electrically the same.
--
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector
2014-02-28 16:34 ` Russell King - ARM Linux
@ 2014-03-01 18:58 ` Geert Uytterhoeven
2014-03-03 7:23 ` Tomi Valkeinen
2014-03-05 8:42 ` Tomi Valkeinen
0 siblings, 2 replies; 71+ messages in thread
From: Geert Uytterhoeven @ 2014-03-01 18:58 UTC (permalink / raw)
To: Russell King - ARM Linux
Cc: devicetree@vger.kernel.org, Linux Fbdev development list,
DRI Development, Andrzej Hajda, Tomi Valkeinen, Laurent Pinchart,
linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth
On Fri, Feb 28, 2014 at 5:34 PM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> There's actually three HDMI connectors:
>
> All three connectors carry all required HDMI signals, including a TMDS
> link. The Type B connector is slightly larger and carries a second TMDS
> link, which is necessary to support very high resolution displays using
> dual link. The Type C connector carries the same signals as the Type A
> but is more compact and intended for mobile applications.
>
> So, Type C and Type A are electrically the same.
There's also D (e.g. on BeagleBone Black) and E:
http://en.wikipedia.org/wiki/HDMI#Connectors
Electrically they seem to be the same as A/C.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector
2014-03-01 18:58 ` Geert Uytterhoeven
@ 2014-03-03 7:23 ` Tomi Valkeinen
2014-03-05 8:42 ` Tomi Valkeinen
1 sibling, 0 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-03 7:23 UTC (permalink / raw)
To: Geert Uytterhoeven, Russell King - ARM Linux
Cc: devicetree@vger.kernel.org, Linux Fbdev development list,
Sascha Hauer, Tomasz Figa, DRI Development, Inki Dae,
Andrzej Hajda, Rob Clark, Thierry Reding, Laurent Pinchart,
Philipp Zabel, linux-arm-kernel@lists.infradead.org,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1181 bytes --]
On 01/03/14 20:58, Geert Uytterhoeven wrote:
> On Fri, Feb 28, 2014 at 5:34 PM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
>> There's actually three HDMI connectors:
>>
>> All three connectors carry all required HDMI signals, including a TMDS
>> link. The Type B connector is slightly larger and carries a second TMDS
>> link, which is necessary to support very high resolution displays using
>> dual link. The Type C connector carries the same signals as the Type A
>> but is more compact and intended for mobile applications.
>>
>> So, Type C and Type A are electrically the same.
>
> There's also D (e.g. on BeagleBone Black) and E:
>
> http://en.wikipedia.org/wiki/HDMI#Connectors
>
> Electrically they seem to be the same as A/C.
Right. And then there are the HDMI versions, and things like HDMI
Ethernet Channel. After looking at these a bit, I don't think the HDMI
connector needs any of those (hdmi version, eth) defined.
So...
compatible = "hdmi-connector";
type = "a";
Or
compatible = "hdmi-connector";
type-a;
I don't right away see any big pro with either one compared to the other.
Tomi
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector
2014-03-01 18:58 ` Geert Uytterhoeven
2014-03-03 7:23 ` Tomi Valkeinen
@ 2014-03-05 8:42 ` Tomi Valkeinen
1 sibling, 0 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-05 8:42 UTC (permalink / raw)
To: Geert Uytterhoeven, Russell King - ARM Linux
Cc: devicetree@vger.kernel.org, Linux Fbdev development list,
Daniel Vetter, Sascha Hauer, Tomasz Figa, DRI Development,
Inki Dae, Andrzej Hajda, Rob Clark, Thierry Reding,
Laurent Pinchart, Philipp Zabel,
linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1316 bytes --]
On 01/03/14 20:58, Geert Uytterhoeven wrote:
> On Fri, Feb 28, 2014 at 5:34 PM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
>> There's actually three HDMI connectors:
>>
>> All three connectors carry all required HDMI signals, including a TMDS
>> link. The Type B connector is slightly larger and carries a second TMDS
>> link, which is necessary to support very high resolution displays using
>> dual link. The Type C connector carries the same signals as the Type A
>> but is more compact and intended for mobile applications.
>>
>> So, Type C and Type A are electrically the same.
>
> There's also D (e.g. on BeagleBone Black) and E:
>
> http://en.wikipedia.org/wiki/HDMI#Connectors
>
> Electrically they seem to be the same as A/C.
I made the following change compared to the posted version.
Tomi
@@ -3,6 +3,7 @@ HDMI Connector
Required properties:
- compatible: "hdmi-connector"
+- type: the HDMI connector type: "a", "b", "c", "d" or "e"
Optional properties:
- label: a symbolic name for the connector
@@ -17,6 +18,8 @@ hdmi0: connector@1 {
compatible = "hdmi-connector";
label = "hdmi";
+ type = "a";
+
hdmi_connector_in: endpoint {
remote-endpoint = <&tpd12s015_out>;
};
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^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector
2014-02-28 16:06 ` Russell King - ARM Linux
2014-02-28 16:15 ` Tomi Valkeinen
@ 2014-03-04 12:59 ` Daniel Vetter
1 sibling, 0 replies; 71+ messages in thread
From: Daniel Vetter @ 2014-03-04 12:59 UTC (permalink / raw)
To: Russell King - ARM Linux
Cc: devicetree, linux-fbdev, dri-devel, Andrzej Hajda, Tomi Valkeinen,
Laurent Pinchart, linux-arm-kernel, Sebastian Hesselbarth
On Fri, Feb 28, 2014 at 04:06:12PM +0000, Russell King - ARM Linux wrote:
> On Fri, Feb 28, 2014 at 02:20:11PM +0200, Tomi Valkeinen wrote:
> > Add DT binding documentation for HDMI Connector.
> >
> > Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> > Reviewed-by: Archit Taneja <archit@ti.com>
> > ---
> > .../devicetree/bindings/video/hdmi-connector.txt | 23 ++++++++++++++++++++++
> > 1 file changed, 23 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/video/hdmi-connector.txt
> >
> > diff --git a/Documentation/devicetree/bindings/video/hdmi-connector.txt b/Documentation/devicetree/bindings/video/hdmi-connector.txt
> > new file mode 100644
> > index 000000000000..5d25f6a432bb
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/video/hdmi-connector.txt
> > @@ -0,0 +1,23 @@
> > +HDMI Connector
> > +==============
> > +
> > +Required properties:
> > +- compatible: "hdmi-connector"
> > +
> > +Optional properties:
> > +- label: a symbolic name for the connector
> > +
> > +Required nodes:
> > +- Video port for HDMI input
> > +
> > +Example
> > +-------
> > +
> > +hdmi0: connector@1 {
> > + compatible = "hdmi-connector";
> > + label = "hdmi";
> > +
> > + hdmi_connector_in: endpoint {
> > + remote-endpoint = <&tpd12s015_out>;
> > + };
> > +};
>
> It seems rather weird to have DVI connectors having an optional I2C
> property, but HDMI (which augments DVI) not having that as at least an
> optional property.
>
> I can quite well see the iMX HDMI support needing an i2c bus here.
>
> Also, HDMI has two connector standards - type A and type B, much like
> the single vs dual link of DVI. Again, DRM exposes this to userspace.
Yeah, there's a dual-link hdmi standard somewhere. I've never seen it in
the wild anywhere though, and newer hdmi all just increase the max link
clock to push higher res modes over the wire. Imo can't hurt to just
enumerate all type of physical connectors standardized.
HDMI revisions themselves are only relevant for the sink (as advertised
capabilities in the EDID) and for your hdmi encoder chip (where pretty
much just the max dotclock is interesting really). So I don't think we
need a hdmi revision in dt for the physical connector.
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (3 preceding siblings ...)
2014-02-28 12:20 ` [PATCH 4/9] Doc/DT: Add DT binding documentation for HDMI Connector Tomi Valkeinen
@ 2014-02-28 12:20 ` Tomi Valkeinen
2014-02-28 13:40 ` Philipp Zabel
2014-03-17 14:19 ` Laurent Pinchart
2014-02-28 12:20 ` [PATCH 6/9] Doc/DT: Add DT binding documentation for MIPI DSI CM Panel Tomi Valkeinen
` (6 subsequent siblings)
11 siblings, 2 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add DT binding documentation for MIPI DPI Panel.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../devicetree/bindings/video/panel-dpi.txt | 43 ++++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/panel-dpi.txt
diff --git a/Documentation/devicetree/bindings/video/panel-dpi.txt b/Documentation/devicetree/bindings/video/panel-dpi.txt
new file mode 100644
index 000000000000..72636c6f1c67
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/panel-dpi.txt
@@ -0,0 +1,43 @@
+Generic MIPI DPI Panel
+======================
+
+Required properties:
+- compatible: "panel-dpi"
+
+Optional properties:
+- label: a symbolic name for the panel
+- gpios: panel enable gpio and backlight enable gpio
+
+Required nodes:
+- "panel-timing" containing video timings
+ (Documentation/devicetree/bindings/video/display-timing.txt)
+- Video port for DPI input
+
+Example
+-------
+
+lcd0: display@0 {
+ compatible = "samsung,lte430wq-f0c", "panel-dpi";
+ label = "lcd";
+
+ lcd_in: endpoint {
+ remote-endpoint = <&dpi_out>;
+ };
+
+ panel-timing {
+ clock-frequency = <9200000>;
+ hactive = <480>;
+ vactive = <272>;
+ hfront-porch = <8>;
+ hback-porch = <4>;
+ hsync-len = <41>;
+ vback-porch = <2>;
+ vfront-porch = <4>;
+ vsync-len = <10>;
+
+ hsync-active = <0>;
+ vsync-active = <0>;
+ de-active = <1>;
+ pixelclk-active = <1>;
+ };
+};
--
1.8.3.2
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
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^ permalink raw reply related [flat|nested] 71+ messages in thread* Re: [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel
2014-02-28 12:20 ` [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel Tomi Valkeinen
@ 2014-02-28 13:40 ` Philipp Zabel
2014-03-03 6:05 ` Tomi Valkeinen
2014-03-17 14:19 ` Laurent Pinchart
1 sibling, 1 reply; 71+ messages in thread
From: Philipp Zabel @ 2014-02-28 13:40 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, dri-devel,
Andrzej Hajda, Laurent Pinchart, linux-arm-kernel,
Sebastian Hesselbarth
Am Freitag, den 28.02.2014, 14:20 +0200 schrieb Tomi Valkeinen:
> Add DT binding documentation for MIPI DPI Panel.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Reviewed-by: Archit Taneja <archit@ti.com>
> ---
> .../devicetree/bindings/video/panel-dpi.txt | 43 ++++++++++++++++++++++
> 1 file changed, 43 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/video/panel-dpi.txt
>
> diff --git a/Documentation/devicetree/bindings/video/panel-dpi.txt b/Documentation/devicetree/bindings/video/panel-dpi.txt
> new file mode 100644
> index 000000000000..72636c6f1c67
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/panel-dpi.txt
> @@ -0,0 +1,43 @@
> +Generic MIPI DPI Panel
> +======================
> +
> +Required properties:
> +- compatible: "panel-dpi"
> +
> +Optional properties:
> +- label: a symbolic name for the panel
> +- gpios: panel enable gpio and backlight enable gpio
> +
> +Required nodes:
> +- "panel-timing" containing video timings
> + (Documentation/devicetree/bindings/video/display-timing.txt)
> +- Video port for DPI input
I don't see anything MIPI specific here. Couldn't this be added to the
existing simple-panel binding?
> +Example
> +-------
> +
> +lcd0: display@0 {
> + compatible = "samsung,lte430wq-f0c", "panel-dpi";
> + label = "lcd";
> +
> + lcd_in: endpoint {
> + remote-endpoint = <&dpi_out>;
> + };
> +
> + panel-timing {
> + clock-frequency = <9200000>;
> + hactive = <480>;
> + vactive = <272>;
> + hfront-porch = <8>;
> + hback-porch = <4>;
> + hsync-len = <41>;
> + vback-porch = <2>;
> + vfront-porch = <4>;
> + vsync-len = <10>;
> +
> + hsync-active = <0>;
> + vsync-active = <0>;
> + de-active = <1>;
> + pixelclk-active = <1>;
> + };
> +};
regards
Philipp
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel
2014-02-28 13:40 ` Philipp Zabel
@ 2014-03-03 6:05 ` Tomi Valkeinen
0 siblings, 0 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-03 6:05 UTC (permalink / raw)
To: Philipp Zabel
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, Sascha Hauer,
Tomasz Figa, dri-devel, Inki Dae, Andrzej Hajda, Rob Clark,
Thierry Reding, Laurent Pinchart, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1438 bytes --]
On 28/02/14 15:40, Philipp Zabel wrote:
> Am Freitag, den 28.02.2014, 14:20 +0200 schrieb Tomi Valkeinen:
>> Add DT binding documentation for MIPI DPI Panel.
>>
>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> Reviewed-by: Archit Taneja <archit@ti.com>
>> ---
>> .../devicetree/bindings/video/panel-dpi.txt | 43 ++++++++++++++++++++++
>> 1 file changed, 43 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/video/panel-dpi.txt
>>
>> diff --git a/Documentation/devicetree/bindings/video/panel-dpi.txt b/Documentation/devicetree/bindings/video/panel-dpi.txt
>> new file mode 100644
>> index 000000000000..72636c6f1c67
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/video/panel-dpi.txt
>> @@ -0,0 +1,43 @@
>> +Generic MIPI DPI Panel
>> +======================
>> +
>> +Required properties:
>> +- compatible: "panel-dpi"
>> +
>> +Optional properties:
>> +- label: a symbolic name for the panel
>> +- gpios: panel enable gpio and backlight enable gpio
>> +
>> +Required nodes:
>> +- "panel-timing" containing video timings
>> + (Documentation/devicetree/bindings/video/display-timing.txt)
>> +- Video port for DPI input
>
> I don't see anything MIPI specific here. Couldn't this be added to the
> existing simple-panel binding?
Hmm, well, the simple-panel bindings doesn't define video ports, and not
even a common compatible property.
Tomi
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_______________________________________________
linux-arm-kernel mailing list
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel
2014-02-28 12:20 ` [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel Tomi Valkeinen
2014-02-28 13:40 ` Philipp Zabel
@ 2014-03-17 14:19 ` Laurent Pinchart
2014-03-18 6:41 ` Tomi Valkeinen
1 sibling, 1 reply; 71+ messages in thread
From: Laurent Pinchart @ 2014-03-17 14:19 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, dri-devel,
Andrzej Hajda, linux-arm-kernel, Sebastian Hesselbarth
Hi Tomi,
Thank you for the patch.
On Friday 28 February 2014 14:20:12 Tomi Valkeinen wrote:
> Add DT binding documentation for MIPI DPI Panel.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Reviewed-by: Archit Taneja <archit@ti.com>
> ---
> .../devicetree/bindings/video/panel-dpi.txt | 43 +++++++++++++++++++
> 1 file changed, 43 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/video/panel-dpi.txt
>
> diff --git a/Documentation/devicetree/bindings/video/panel-dpi.txt
> b/Documentation/devicetree/bindings/video/panel-dpi.txt new file mode
> 100644
> index 000000000000..72636c6f1c67
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/panel-dpi.txt
> @@ -0,0 +1,43 @@
> +Generic MIPI DPI Panel
> +======================
> +
> +Required properties:
> +- compatible: "panel-dpi"
> +
> +Optional properties:
> +- label: a symbolic name for the panel
> +- gpios: panel enable gpio and backlight enable gpio
While integrated in the panel module, the backlight is a separate piece of
hardware, which could be controlled through other means (I2C for instance).
Wouldn't it be better to add an explicit DT node for the backlight device and
reference that node from the panel node ?
> +
> +Required nodes:
> +- "panel-timing" containing video timings
> + (Documentation/devicetree/bindings/video/display-timing.txt)
> +- Video port for DPI input
> +
> +Example
> +-------
> +
> +lcd0: display@0 {
> + compatible = "samsung,lte430wq-f0c", "panel-dpi";
> + label = "lcd";
> +
> + lcd_in: endpoint {
> + remote-endpoint = <&dpi_out>;
> + };
> +
> + panel-timing {
> + clock-frequency = <9200000>;
> + hactive = <480>;
> + vactive = <272>;
> + hfront-porch = <8>;
> + hback-porch = <4>;
> + hsync-len = <41>;
> + vback-porch = <2>;
> + vfront-porch = <4>;
> + vsync-len = <10>;
> +
> + hsync-active = <0>;
> + vsync-active = <0>;
> + de-active = <1>;
> + pixelclk-active = <1>;
> + };
> +};
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel
2014-03-17 14:19 ` Laurent Pinchart
@ 2014-03-18 6:41 ` Tomi Valkeinen
2014-03-18 7:06 ` Tomi Valkeinen
0 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-18 6:41 UTC (permalink / raw)
To: Laurent Pinchart
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, Sascha Hauer,
Tomasz Figa, dri-devel, Inki Dae, Andrzej Hajda, Rob Clark,
Thierry Reding, Philipp Zabel, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 762 bytes --]
On 17/03/14 16:19, Laurent Pinchart wrote:
>> +Generic MIPI DPI Panel
>> +======================
>> +
>> +Required properties:
>> +- compatible: "panel-dpi"
>> +
>> +Optional properties:
>> +- label: a symbolic name for the panel
>> +- gpios: panel enable gpio and backlight enable gpio
>
> While integrated in the panel module, the backlight is a separate piece of
> hardware, which could be controlled through other means (I2C for instance).
> Wouldn't it be better to add an explicit DT node for the backlight device and
> reference that node from the panel node ?
Yes, I agree, but do we have the infrastructure or bindings for that?
Ah, I see we now do have a gpio-backlight driver, but it doesn't have DT
bindings.
Tomi
[-- Attachment #1.2: OpenPGP digital signature --]
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_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel
2014-03-18 6:41 ` Tomi Valkeinen
@ 2014-03-18 7:06 ` Tomi Valkeinen
0 siblings, 0 replies; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-18 7:06 UTC (permalink / raw)
To: Laurent Pinchart
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, Sascha Hauer,
Tomasz Figa, dri-devel, Inki Dae, Andrzej Hajda, Rob Clark,
Thierry Reding, Philipp Zabel, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1174 bytes --]
On 18/03/14 08:41, Tomi Valkeinen wrote:
> On 17/03/14 16:19, Laurent Pinchart wrote:
>
>>> +Generic MIPI DPI Panel
>>> +======================
>>> +
>>> +Required properties:
>>> +- compatible: "panel-dpi"
>>> +
>>> +Optional properties:
>>> +- label: a symbolic name for the panel
>>> +- gpios: panel enable gpio and backlight enable gpio
>>
>> While integrated in the panel module, the backlight is a separate piece of
>> hardware, which could be controlled through other means (I2C for instance).
>> Wouldn't it be better to add an explicit DT node for the backlight device and
>> reference that node from the panel node ?
>
> Yes, I agree, but do we have the infrastructure or bindings for that?
>
> Ah, I see we now do have a gpio-backlight driver, but it doesn't have DT
> bindings.
Seems there's a patch from Denis Carikli for this, which will probably
be merged for 3.15.
I realized I don't actually use panel-dpi at the moment in my OMAP DSS
DT series, as I dropped the board changes that used panel-dpi. So I'll
drop panel-dpi bindings from my series, and the backlight for panel-dpi
can then be fixed for 3.16.
Tomi
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_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH 6/9] Doc/DT: Add DT binding documentation for MIPI DSI CM Panel
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (4 preceding siblings ...)
2014-02-28 12:20 ` [PATCH 5/9] Doc/DT: Add DT binding documentation for MIPI DPI Panel Tomi Valkeinen
@ 2014-02-28 12:20 ` Tomi Valkeinen
2014-03-17 14:22 ` Laurent Pinchart
2014-02-28 12:20 ` [PATCH 7/9] Doc/DT: Add DT binding documentation for Sony acx565akm panel Tomi Valkeinen
` (5 subsequent siblings)
11 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add DT binding documentation for MIPI DSI Command Mode Panel.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../devicetree/bindings/video/panel-dsi-cm.txt | 26 ++++++++++++++++++++++
1 file changed, 26 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/panel-dsi-cm.txt
diff --git a/Documentation/devicetree/bindings/video/panel-dsi-cm.txt b/Documentation/devicetree/bindings/video/panel-dsi-cm.txt
new file mode 100644
index 000000000000..73f422556d4f
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/panel-dsi-cm.txt
@@ -0,0 +1,26 @@
+Generic MIPI DSI Command Mode Panel
+===================================
+
+Required properties:
+- compatible: "panel-dsi-cm"
+
+Optional properties:
+- label: a symbolic name for the panel
+- gpios: panel reset gpio and TE gpio
+
+Required nodes:
+- Video port for DSI input
+
+Example
+-------
+
+lcd0: display {
+ compatible = "tpo,taal", "panel-dsi-cm";
+ label = "lcd0";
+
+ gpios = <&gpio4 6 GPIO_ACTIVE_HIGH>; /* 102, reset */
+
+ lcd0_in: endpoint {
+ remote-endpoint = <&dsi1_out_ep>;
+ };
+};
--
1.8.3.2
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
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^ permalink raw reply related [flat|nested] 71+ messages in thread* Re: [PATCH 6/9] Doc/DT: Add DT binding documentation for MIPI DSI CM Panel
2014-02-28 12:20 ` [PATCH 6/9] Doc/DT: Add DT binding documentation for MIPI DSI CM Panel Tomi Valkeinen
@ 2014-03-17 14:22 ` Laurent Pinchart
2014-03-18 6:33 ` Tomi Valkeinen
0 siblings, 1 reply; 71+ messages in thread
From: Laurent Pinchart @ 2014-03-17 14:22 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, dri-devel,
Andrzej Hajda, linux-arm-kernel, Sebastian Hesselbarth
Hi Tomi,
Thank you for the patch.
On Friday 28 February 2014 14:20:13 Tomi Valkeinen wrote:
> Add DT binding documentation for MIPI DSI Command Mode Panel.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Reviewed-by: Archit Taneja <archit@ti.com>
> ---
> .../devicetree/bindings/video/panel-dsi-cm.txt | 26 +++++++++++++++++++
> 1 file changed, 26 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/video/panel-dsi-cm.txt
>
> diff --git a/Documentation/devicetree/bindings/video/panel-dsi-cm.txt
> b/Documentation/devicetree/bindings/video/panel-dsi-cm.txt new file mode
> 100644
> index 000000000000..73f422556d4f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/panel-dsi-cm.txt
> @@ -0,0 +1,26 @@
> +Generic MIPI DSI Command Mode Panel
> +===================================
> +
> +Required properties:
> +- compatible: "panel-dsi-cm"
> +
> +Optional properties:
> +- label: a symbolic name for the panel
> +- gpios: panel reset gpio and TE gpio
> +
> +Required nodes:
> +- Video port for DSI input
> +
> +Example
> +-------
> +
> +lcd0: display {
> + compatible = "tpo,taal", "panel-dsi-cm";
> + label = "lcd0";
> +
> + gpios = <&gpio4 6 GPIO_ACTIVE_HIGH>; /* 102, reset */
If the panel uses a TE GPIO but no reset GPIO, do you plan to express this
with a "hole" for the reset GPIO ? e.g. something like
gpios = <0>, <&gpio4 6 GPIO_ACTIVE_HIGH>;
Wouldn't it be better to split the gpios property into "reset-gpios" and "te-
gpios" ?
> +
> + lcd0_in: endpoint {
> + remote-endpoint = <&dsi1_out_ep>;
> + };
> +};
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 6/9] Doc/DT: Add DT binding documentation for MIPI DSI CM Panel
2014-03-17 14:22 ` Laurent Pinchart
@ 2014-03-18 6:33 ` Tomi Valkeinen
2014-03-18 12:43 ` Laurent Pinchart
0 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-18 6:33 UTC (permalink / raw)
To: Laurent Pinchart
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, Sascha Hauer,
Tomasz Figa, dri-devel, Inki Dae, Andrzej Hajda, Rob Clark,
Thierry Reding, Philipp Zabel, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 885 bytes --]
On 17/03/14 16:22, Laurent Pinchart wrote:
>> +Example
>> +-------
>> +
>> +lcd0: display {
>> + compatible = "tpo,taal", "panel-dsi-cm";
>> + label = "lcd0";
>> +
>> + gpios = <&gpio4 6 GPIO_ACTIVE_HIGH>; /* 102, reset */
>
> If the panel uses a TE GPIO but no reset GPIO, do you plan to express this
> with a "hole" for the reset GPIO ? e.g. something like
>
> gpios = <0>, <&gpio4 6 GPIO_ACTIVE_HIGH>;
Yes.
> Wouldn't it be better to split the gpios property into "reset-gpios" and "te-
> gpios" ?
Yes, I can change it. I don't have a strong preference.
I've gotten similar comments for other bindings also, so I guess the
preferred way is to use named "-gpios" properties for everything except
the case where you really have multiple gpios with the same purpose?
The gpio binding documentation doesn't give much guidance on this.
Tomi
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_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 6/9] Doc/DT: Add DT binding documentation for MIPI DSI CM Panel
2014-03-18 6:33 ` Tomi Valkeinen
@ 2014-03-18 12:43 ` Laurent Pinchart
0 siblings, 0 replies; 71+ messages in thread
From: Laurent Pinchart @ 2014-03-18 12:43 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, dri-devel,
Andrzej Hajda, linux-arm-kernel, Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 1060 bytes --]
Hi Tomi,
On Tuesday 18 March 2014 08:33:55 Tomi Valkeinen wrote:
> On 17/03/14 16:22, Laurent Pinchart wrote:
> >> +Example
> >> +-------
> >> +
> >> +lcd0: display {
> >> + compatible = "tpo,taal", "panel-dsi-cm";
> >> + label = "lcd0";
> >> +
> >> + gpios = <&gpio4 6 GPIO_ACTIVE_HIGH>; /* 102, reset */
> >
> > If the panel uses a TE GPIO but no reset GPIO, do you plan to express this
> > with a "hole" for the reset GPIO ? e.g. something like
> >
> > gpios = <0>, <&gpio4 6 GPIO_ACTIVE_HIGH>;
>
> Yes.
>
> > Wouldn't it be better to split the gpios property into "reset-gpios" and
> > "te- gpios" ?
>
> Yes, I can change it. I don't have a strong preference.
>
> I've gotten similar comments for other bindings also, so I guess the
> preferred way is to use named "-gpios" properties for everything except
> the case where you really have multiple gpios with the same purpose?
That's my understanding, yes.
> The gpio binding documentation doesn't give much guidance on this.
--
Regards,
Laurent Pinchart
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_______________________________________________
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^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH 7/9] Doc/DT: Add DT binding documentation for Sony acx565akm panel
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (5 preceding siblings ...)
2014-02-28 12:20 ` [PATCH 6/9] Doc/DT: Add DT binding documentation for MIPI DSI CM Panel Tomi Valkeinen
@ 2014-02-28 12:20 ` Tomi Valkeinen
2014-02-28 13:38 ` Philipp Zabel
2014-02-28 12:20 ` [PATCH 8/9] Doc/DT: Add DT binding documentation for TFP410 encoder Tomi Valkeinen
` (4 subsequent siblings)
11 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add DT binding documentation for Sony acx565akm panel
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Sebastian Reichel <sre-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../devicetree/bindings/video/sony,acx565akm.txt | 28 ++++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/sony,acx565akm.txt
diff --git a/Documentation/devicetree/bindings/video/sony,acx565akm.txt b/Documentation/devicetree/bindings/video/sony,acx565akm.txt
new file mode 100644
index 000000000000..cd9cfdf7e3fe
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/sony,acx565akm.txt
@@ -0,0 +1,28 @@
+Sony ACX565AKM SDI Panel
+========================
+
+Required properties:
+- compatible: "sony,acx565akm"
+
+Optional properties:
+- label: a symbolic name for the panel
+- gpios: panel reset gpio
+
+Required nodes:
+- Video port for SDI input
+
+Example
+-------
+
+acx565akm@2 {
+ compatible = "sony,acx565akm";
+ spi-max-frequency = <6000000>;
+ reg = <2>;
+
+ label = "lcd";
+ gpios = <&gpio3 26 GPIO_ACTIVE_HIGH>; /* 90 */
+
+ lcd_in: endpoint {
+ remote-endpoint = <&sdi_out>;
+ };
+};
--
1.8.3.2
--
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^ permalink raw reply related [flat|nested] 71+ messages in thread* Re: [PATCH 7/9] Doc/DT: Add DT binding documentation for Sony acx565akm panel
2014-02-28 12:20 ` [PATCH 7/9] Doc/DT: Add DT binding documentation for Sony acx565akm panel Tomi Valkeinen
@ 2014-02-28 13:38 ` Philipp Zabel
[not found] ` <1393594707.3802.31.camel-+qGW7pzALmz7o/J7KWpOmN53zsg1cpMQ@public.gmane.org>
0 siblings, 1 reply; 71+ messages in thread
From: Philipp Zabel @ 2014-02-28 13:38 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, dri-devel,
Andrzej Hajda, Laurent Pinchart, linux-arm-kernel,
Sebastian Hesselbarth
Hi Tomi,
Am Freitag, den 28.02.2014, 14:20 +0200 schrieb Tomi Valkeinen:
> Add DT binding documentation for Sony acx565akm panel
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Reviewed-by: Sebastian Reichel <sre@debian.org>
> Reviewed-by: Archit Taneja <archit@ti.com>
> ---
> .../devicetree/bindings/video/sony,acx565akm.txt | 28 ++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/video/sony,acx565akm.txt
>
> diff --git a/Documentation/devicetree/bindings/video/sony,acx565akm.txt b/Documentation/devicetree/bindings/video/sony,acx565akm.txt
> new file mode 100644
> index 000000000000..cd9cfdf7e3fe
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/sony,acx565akm.txt
> @@ -0,0 +1,28 @@
> +Sony ACX565AKM SDI Panel
> +========================
> +
> +Required properties:
> +- compatible: "sony,acx565akm"
> +
> +Optional properties:
> +- label: a symbolic name for the panel
> +- gpios: panel reset gpio
please let's call this reset-gpios.
> +Required nodes:
> +- Video port for SDI input
> +
> +Example
> +-------
> +
> +acx565akm@2 {
> + compatible = "sony,acx565akm";
> + spi-max-frequency = <6000000>;
> + reg = <2>;
> +
> + label = "lcd";
> + gpios = <&gpio3 26 GPIO_ACTIVE_HIGH>; /* 90 */
> +
> + lcd_in: endpoint {
> + remote-endpoint = <&sdi_out>;
> + };
> +};
regards
Philipp
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH 8/9] Doc/DT: Add DT binding documentation for TFP410 encoder
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (6 preceding siblings ...)
2014-02-28 12:20 ` [PATCH 7/9] Doc/DT: Add DT binding documentation for Sony acx565akm panel Tomi Valkeinen
@ 2014-02-28 12:20 ` Tomi Valkeinen
2014-02-28 13:37 ` Philipp Zabel
2014-02-28 12:20 ` [PATCH 9/9] Doc/DT: Add DT binding documentation for tpd12s015 encoder Tomi Valkeinen
` (3 subsequent siblings)
11 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add DT binding documentation for TFP410 encoder
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../devicetree/bindings/video/ti,tfp410.txt | 41 ++++++++++++++++++++++
1 file changed, 41 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/ti,tfp410.txt
diff --git a/Documentation/devicetree/bindings/video/ti,tfp410.txt b/Documentation/devicetree/bindings/video/ti,tfp410.txt
new file mode 100644
index 000000000000..6a5a04627584
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/ti,tfp410.txt
@@ -0,0 +1,41 @@
+TFP410 DPI to DVI encoder
+=========================
+
+Required properties:
+- compatible: "ti,tfp410"
+
+Optional properties:
+- gpios: power-down gpio
+
+Required nodes:
+- Video port 0 for DPI input
+- Video port 1 for DVI output
+
+Example
+-------
+
+tfp410: encoder@0 {
+ compatible = "ti,tfp410";
+ gpios = <&twl_gpio 2 GPIO_ACTIVE_LOW>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ tfp410_in: endpoint@0 {
+ remote-endpoint = <&dpi_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ tfp410_out: endpoint@0 {
+ remote-endpoint = <&dvi_connector_in>;
+ };
+ };
+ };
+};
--
1.8.3.2
--
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^ permalink raw reply related [flat|nested] 71+ messages in thread* Re: [PATCH 8/9] Doc/DT: Add DT binding documentation for TFP410 encoder
2014-02-28 12:20 ` [PATCH 8/9] Doc/DT: Add DT binding documentation for TFP410 encoder Tomi Valkeinen
@ 2014-02-28 13:37 ` Philipp Zabel
0 siblings, 0 replies; 71+ messages in thread
From: Philipp Zabel @ 2014-02-28 13:37 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, dri-devel,
Andrzej Hajda, Laurent Pinchart, linux-arm-kernel,
Sebastian Hesselbarth
Am Freitag, den 28.02.2014, 14:20 +0200 schrieb Tomi Valkeinen:
> Add DT binding documentation for TFP410 encoder
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Reviewed-by: Archit Taneja <archit@ti.com>
> ---
> .../devicetree/bindings/video/ti,tfp410.txt | 41 ++++++++++++++++++++++
> 1 file changed, 41 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/video/ti,tfp410.txt
>
> diff --git a/Documentation/devicetree/bindings/video/ti,tfp410.txt b/Documentation/devicetree/bindings/video/ti,tfp410.txt
> new file mode 100644
> index 000000000000..6a5a04627584
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/video/ti,tfp410.txt
> @@ -0,0 +1,41 @@
> +TFP410 DPI to DVI encoder
> +=========================
> +
> +Required properties:
> +- compatible: "ti,tfp410"
> +
> +Optional properties:
> +- gpios: power-down gpio
Maybe call this powerdown-gpios?
> +Required nodes:
> +- Video port 0 for DPI input
> +- Video port 1 for DVI output
> +
> +Example
> +-------
> +
> +tfp410: encoder@0 {
> + compatible = "ti,tfp410";
> + gpios = <&twl_gpio 2 GPIO_ACTIVE_LOW>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> +
> + tfp410_in: endpoint@0 {
> + remote-endpoint = <&dpi_out>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> +
> + tfp410_out: endpoint@0 {
> + remote-endpoint = <&dvi_connector_in>;
> + };
> + };
> + };
> +};
regards
Philipp
^ permalink raw reply [flat|nested] 71+ messages in thread
* [PATCH 9/9] Doc/DT: Add DT binding documentation for tpd12s015 encoder
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (7 preceding siblings ...)
2014-02-28 12:20 ` [PATCH 8/9] Doc/DT: Add DT binding documentation for TFP410 encoder Tomi Valkeinen
@ 2014-02-28 12:20 ` Tomi Valkeinen
[not found] ` <1393590016-9361-10-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
2014-02-28 12:57 ` [PATCH 0/9] Doc/DT: DT bindings for various display components Sebastian Hesselbarth
` (2 subsequent siblings)
11 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 12:20 UTC (permalink / raw)
To: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Sebastian Hesselbarth, Rob Clark, Inki Dae,
Andrzej Hajda, Tomasz Figa, Thierry Reding, Tomi Valkeinen
Add DT binding documentation for tpd12s015 encoder
Signed-off-by: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Reviewed-by: Archit Taneja <archit-l0cyMroinI0@public.gmane.org>
---
.../devicetree/bindings/video/ti,tpd12s015.txt | 44 ++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/ti,tpd12s015.txt
diff --git a/Documentation/devicetree/bindings/video/ti,tpd12s015.txt b/Documentation/devicetree/bindings/video/ti,tpd12s015.txt
new file mode 100644
index 000000000000..26e6d32e3f20
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/ti,tpd12s015.txt
@@ -0,0 +1,44 @@
+TPD12S015 HDMI level shifter and ESD protection chip
+====================================================
+
+Required properties:
+- compatible: "ti,tpd12s015"
+
+Optional properties:
+- gpios: CT CP HPD, LS OE and HPD gpios
+
+Required nodes:
+- Video port 0 for HDMI input
+- Video port 1 for HDMI output
+
+Example
+-------
+
+tpd12s015: encoder@1 {
+ compatible = "ti,tpd12s015";
+
+ gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>, /* 60, CT CP HPD */
+ <&gpio2 9 GPIO_ACTIVE_HIGH>, /* 41, LS OE */
+ <&gpio2 31 GPIO_ACTIVE_HIGH>; /* 63, HPD */
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ tpd12s015_in: endpoint@0 {
+ remote-endpoint = <&hdmi_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ tpd12s015_out: endpoint@0 {
+ remote-endpoint = <&hdmi_connector_in>;
+ };
+ };
+ };
+};
--
1.8.3.2
--
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^ permalink raw reply related [flat|nested] 71+ messages in thread* Re: [PATCH 0/9] Doc/DT: DT bindings for various display components
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (8 preceding siblings ...)
2014-02-28 12:20 ` [PATCH 9/9] Doc/DT: Add DT binding documentation for tpd12s015 encoder Tomi Valkeinen
@ 2014-02-28 12:57 ` Sebastian Hesselbarth
2014-02-28 13:14 ` Tomi Valkeinen
2014-02-28 13:47 ` Philipp Zabel
2014-02-28 16:27 ` Russell King - ARM Linux
2014-03-12 8:15 ` Tomi Valkeinen
11 siblings, 2 replies; 71+ messages in thread
From: Sebastian Hesselbarth @ 2014-02-28 12:57 UTC (permalink / raw)
To: Tomi Valkeinen, linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Philipp Zabel, Laurent Pinchart, Russell King - ARM Linux,
Sascha Hauer, Rob Clark, Inki Dae, Andrzej Hajda, Tomasz Figa,
Thierry Reding
On 02/28/14 13:20, Tomi Valkeinen wrote:
> This series is a re-send of
> http://article.gmane.org/gmane.linux.drivers.devicetree/61739
>
...
> Shortly about the display components in the series, in the order of probable
> public interest:
>
> * Analog TV, DVI and HDMI Connectors represent a respective connector on the
> board. They don't do much, but they do mark the end of the video pipeline (from
> the board's pov), and they should also in the future offer ways to handle
> things like the +5V pin on DVI and HDMI connector and HPD pin.
>
> * MIPI DPI panel and MIPI DSI CM panels represent bindings for simple panels
> using the respective video bus.
>
> * Sony acx565akm is an SPI controlled panel using flatlink video bus.
>
> * TFP410 is a DPI to DVI encoder.
>
> * TPD12S015 is a HDMI companion chip, used on OMAP boards.
Tomi,
Out of curiosity, will there be DT nodes for pull-up resistors soon,
too? ;)
Honestly, TPD12S015 is a level shifter, there is nothing in it that
would justify a DT node nor a driver.
Above you already note, that connector nodes should offer HPD in the
future, but I guess the binding should represent that now already.
I will be a DT stub anyway, the corresponding video sink driver will
have to look it up.
Looking through the bindings for DVI and HDMI, I guess HPD gpio is
better kept in those nodes. From the relevant (DT) properties DVI and
HDMI connectors are in no way different.
Sebastian
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^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 0/9] Doc/DT: DT bindings for various display components
2014-02-28 12:57 ` [PATCH 0/9] Doc/DT: DT bindings for various display components Sebastian Hesselbarth
@ 2014-02-28 13:14 ` Tomi Valkeinen
[not found] ` <53108B9C.5000006-l0cyMroinI0@public.gmane.org>
2014-02-28 13:47 ` Philipp Zabel
1 sibling, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-02-28 13:14 UTC (permalink / raw)
To: Sebastian Hesselbarth, linux-fbdev, dri-devel, devicetree,
linux-arm-kernel
Cc: Russell King - ARM Linux, Sascha Hauer, Tomasz Figa, Inki Dae,
Andrzej Hajda, Rob Clark, Thierry Reding, Laurent Pinchart,
Philipp Zabel
[-- Attachment #1.1: Type: text/plain, Size: 2116 bytes --]
On 28/02/14 14:57, Sebastian Hesselbarth wrote:
> Out of curiosity, will there be DT nodes for pull-up resistors soon,
> too? ;)
If they don't work automatically, yes, we need DT nodes and drivers for
them.
> Honestly, TPD12S015 is a level shifter, there is nothing in it that
> would justify a DT node nor a driver.
TPD requires a power. Who turns that on? It also has two GPIOs, LS_OE
and CT_CP_HPD, which need to be controlled based on what the user wants
and the state of the HPD line. Who controls those?
> Above you already note, that connector nodes should offer HPD in the
> future, but I guess the binding should represent that now already.
I think it can be added when somebody uses it. I don't see why that
would cause trouble later to those that don't use it.
> I will be a DT stub anyway, the corresponding video sink driver will
> have to look it up.
I'm not sure what you mean with that. Yes, it's not the most complex DT
nodes out there.
> Looking through the bindings for DVI and HDMI, I guess HPD gpio is
> better kept in those nodes. From the relevant (DT) properties DVI and
> HDMI connectors are in no way different.
Well, I think the HPD gpio should be where it's most logical to have it.
I mean, you could have a setup where you have the SoC HDMI encoder and
and the HDMI connector, and the HPD pin goes directly to the HDMI
encoder, which has HW support for it. In that case, the HDMI encoder
node should contain the HPD, and the HDMI encoder should handle it.
Or, your HDMI encoder could not have any kind of support for HPD. In
that case you could have the HDMI connector driver handle the hotplug
event. You could of course make the HDMI encoder driver handle the HPD
gpio, but I usually try to have the driver handle the hardware device in
question.
In OMAP's case, we have the TPD chip between the HDMI encoder and the
connector, and the logical place to handle HPD GPIO in that case is the
TPD driver, as that's where the HPD is connected to and the TPD needs to
be configured according to the state of the HPD.
Tomi
[-- Attachment #1.2: OpenPGP digital signature --]
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[-- Attachment #2: Type: text/plain, Size: 176 bytes --]
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^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 0/9] Doc/DT: DT bindings for various display components
2014-02-28 12:57 ` [PATCH 0/9] Doc/DT: DT bindings for various display components Sebastian Hesselbarth
2014-02-28 13:14 ` Tomi Valkeinen
@ 2014-02-28 13:47 ` Philipp Zabel
[not found] ` <1393595264.3802.39.camel-+qGW7pzALmz7o/J7KWpOmN53zsg1cpMQ@public.gmane.org>
1 sibling, 1 reply; 71+ messages in thread
From: Philipp Zabel @ 2014-02-28 13:47 UTC (permalink / raw)
To: Sebastian Hesselbarth
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, dri-devel,
Andrzej Hajda, Tomi Valkeinen, Laurent Pinchart, linux-arm-kernel
Hi,
Am Freitag, den 28.02.2014, 13:57 +0100 schrieb Sebastian Hesselbarth:
> On 02/28/14 13:20, Tomi Valkeinen wrote:
> > This series is a re-send of
> > http://article.gmane.org/gmane.linux.drivers.devicetree/61739
> >
> ...
> > Shortly about the display components in the series, in the order of probable
> > public interest:
> >
> > * Analog TV, DVI and HDMI Connectors represent a respective connector on the
> > board. They don't do much, but they do mark the end of the video pipeline (from
> > the board's pov), and they should also in the future offer ways to handle
> > things like the +5V pin on DVI and HDMI connector and HPD pin.
> >
> > * MIPI DPI panel and MIPI DSI CM panels represent bindings for simple panels
> > using the respective video bus.
> >
> > * Sony acx565akm is an SPI controlled panel using flatlink video bus.
> >
> > * TFP410 is a DPI to DVI encoder.
> >
> > * TPD12S015 is a HDMI companion chip, used on OMAP boards.
>
> Tomi,
>
> Out of curiosity, will there be DT nodes for pull-up resistors soon,
> too? ;)
>
> Honestly, TPD12S015 is a level shifter, there is nothing in it that
> would justify a DT node nor a driver.
>
> Above you already note, that connector nodes should offer HPD in the
> future, but I guess the binding should represent that now already.
> I will be a DT stub anyway, the corresponding video sink driver will
> have to look it up.
>
> Looking through the bindings for DVI and HDMI, I guess HPD gpio is
> better kept in those nodes. From the relevant (DT) properties DVI and
> HDMI connectors are in no way different.
I like the idea of adding actual connector nodes to the board device
trees. A TV encoder driver for example could this way detect from the
device tree whether it is connected to a VGA, Composite, or S-Video
connector (or maybe to both Composite and S-Video connectors at the same
time).
regards
Philipp
^ permalink raw reply [flat|nested] 71+ messages in thread
* Re: [PATCH 0/9] Doc/DT: DT bindings for various display components
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (9 preceding siblings ...)
2014-02-28 12:57 ` [PATCH 0/9] Doc/DT: DT bindings for various display components Sebastian Hesselbarth
@ 2014-02-28 16:27 ` Russell King - ARM Linux
[not found] ` <20140228162752.GU21483-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2014-03-12 8:15 ` Tomi Valkeinen
11 siblings, 1 reply; 71+ messages in thread
From: Russell King - ARM Linux @ 2014-02-28 16:27 UTC (permalink / raw)
To: Tomi Valkeinen
Cc: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Philipp Zabel,
Laurent Pinchart, Sascha Hauer, Sebastian Hesselbarth, Rob Clark,
Inki Dae, Andrzej Hajda, Tomasz Figa, Thierry Reding
On Fri, Feb 28, 2014 at 02:20:07PM +0200, Tomi Valkeinen wrote:
> Shortly about the display components in the series, in the order of probable
> public interest:
>
> * Analog TV, DVI and HDMI Connectors represent a respective connector on the
> board. They don't do much, but they do mark the end of the video pipeline (from
> the board's pov), and they should also in the future offer ways to handle
> things like the +5V pin on DVI and HDMI connector and HPD pin.
The big thing which concerns me is that we're using very generic
compatible strings here - has anyone done any searches to see whether
there are any existing standards for this kind of stuff already?
Even if none can be found, if we're going to create something like
this, it should probably become a public standard not just for Linux.
If we're not willing to do that, I'd suggest prefixing the compatible
strings with "linux," as a "company" identifier so that there's no
chance that we may hit some major problem caused by a conflicting
implementation in the future.
We could alternatively take the view that Linux will only ever be used
with Linux specific DT files, but I think that's a rather broken
approach given what DT is supposed to be.
--
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improving, and getting towards what was expected from it.
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^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 0/9] Doc/DT: DT bindings for various display components
[not found] ` <1393590016-9361-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
` (10 preceding siblings ...)
2014-02-28 16:27 ` Russell King - ARM Linux
@ 2014-03-12 8:15 ` Tomi Valkeinen
2014-03-17 13:55 ` Tomi Valkeinen
11 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-12 8:15 UTC (permalink / raw)
To: Grant Likely
Cc: linux-fbdev-u79uwXL29TY76Z2rM5mHXA,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Philipp Zabel,
Laurent Pinchart, Russell King - ARM Linux, Sascha Hauer,
Sebastian Hesselbarth, Rob Clark, Inki Dae, Andrzej Hajda,
Tomasz Figa, Thierry Reding
[-- Attachment #1: Type: text/plain, Size: 2104 bytes --]
Hi Grant,
On 28/02/14 14:20, Tomi Valkeinen wrote:
> Hi,
>
> This series is a re-send of
> http://article.gmane.org/gmane.linux.drivers.devicetree/61739
>
> I'm cc'ing more people, and I want to clarify the contents of the series:
>
> While this has been developed for OMAP, only the first patch is about OMAP
> bindings. The rest are generic bindings for video components, which can be used
> on any platform.
>
> The bindings use the V4L2 style video port/endpoint system, described in
> Documentation/devicetree/bindings/media/video-interfaces.txt, to connect the
> components. The same port/endpoint bindings are used by Philipp Zabel in his
> imx-drm patch series.
This series is a piece of bigger series, which brings DT support for
OMAP display subsystem. This uses the same V4L2 style ports/endpoints as
has been discussed recently regarding the series from Philipp. It
doesn't use the helper code from Philipp, but a custom one as Philipp's
code didn't exist when I made this, and also because I needed extra
functionality not present in Philipp's series (which aimed to just move
the current V4L2 code to a common place).
The main concerns with the ports/endpoints has been the optional 'port'
node for the case where we have a single endpoint, and the
double-linking of the endpoints.
If I remove the optional 'port' usage from my series, are you ok with me
proceeding with this series for 3.15, with the double-linked endpoints?
As far as I see, when we come to a conclusion how the linking should be
made, it's trivial to change the bindings in this series to match it,
even without needing any compatibility code. I just need to remove the
other link, and old dts files having double-linking will still work fine.
The reason I want to push this forward asap is that omap4 and omap5 are
already DT only, and for omap5 we don't have working display without DT
support for display. For omap4, we have a really hacky way to add
display support for a few boards, but that is causing major headaches
and I want to get rid of it.
Tomi
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^ permalink raw reply [flat|nested] 71+ messages in thread* Re: [PATCH 0/9] Doc/DT: DT bindings for various display components
2014-03-12 8:15 ` Tomi Valkeinen
@ 2014-03-17 13:55 ` Tomi Valkeinen
[not found] ` <5326FECF.9070104-l0cyMroinI0@public.gmane.org>
0 siblings, 1 reply; 71+ messages in thread
From: Tomi Valkeinen @ 2014-03-17 13:55 UTC (permalink / raw)
To: Grant Likely
Cc: devicetree, linux-fbdev, Russell King - ARM Linux, Sascha Hauer,
Tomasz Figa, dri-devel, Inki Dae, Andrzej Hajda, Rob Clark,
Thierry Reding, Laurent Pinchart, Philipp Zabel, linux-arm-kernel,
Sebastian Hesselbarth
[-- Attachment #1.1: Type: text/plain, Size: 2340 bytes --]
Hi Grant,
Ping.
Are you fine with me proceeding with the current V4L2 port/endpoint
bindings?
Tomi
On 12/03/14 10:15, Tomi Valkeinen wrote:
> Hi Grant,
>
> On 28/02/14 14:20, Tomi Valkeinen wrote:
>> Hi,
>>
>> This series is a re-send of
>> http://article.gmane.org/gmane.linux.drivers.devicetree/61739
>>
>> I'm cc'ing more people, and I want to clarify the contents of the series:
>>
>> While this has been developed for OMAP, only the first patch is about OMAP
>> bindings. The rest are generic bindings for video components, which can be used
>> on any platform.
>>
>> The bindings use the V4L2 style video port/endpoint system, described in
>> Documentation/devicetree/bindings/media/video-interfaces.txt, to connect the
>> components. The same port/endpoint bindings are used by Philipp Zabel in his
>> imx-drm patch series.
>
> This series is a piece of bigger series, which brings DT support for
> OMAP display subsystem. This uses the same V4L2 style ports/endpoints as
> has been discussed recently regarding the series from Philipp. It
> doesn't use the helper code from Philipp, but a custom one as Philipp's
> code didn't exist when I made this, and also because I needed extra
> functionality not present in Philipp's series (which aimed to just move
> the current V4L2 code to a common place).
>
> The main concerns with the ports/endpoints has been the optional 'port'
> node for the case where we have a single endpoint, and the
> double-linking of the endpoints.
>
> If I remove the optional 'port' usage from my series, are you ok with me
> proceeding with this series for 3.15, with the double-linked endpoints?
>
> As far as I see, when we come to a conclusion how the linking should be
> made, it's trivial to change the bindings in this series to match it,
> even without needing any compatibility code. I just need to remove the
> other link, and old dts files having double-linking will still work fine.
>
> The reason I want to push this forward asap is that omap4 and omap5 are
> already DT only, and for omap5 we don't have working display without DT
> support for display. For omap4, we have a really hacky way to add
> display support for a few boards, but that is causing major headaches
> and I want to get rid of it.
>
> Tomi
>
>
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^ permalink raw reply [flat|nested] 71+ messages in thread