| Message ID | 20220818143307.967150-4-m.felsch@pengutronix.de |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add support for Toshiba TC358746 | expand |
On Thu, 18 Aug 2022 16:33:06 +0200, Marco Felsch wrote: > Add the bindings for the Toshiba TC358746 Parallel <-> MIPI-CSI bridge > driver. > > Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> > --- > .../bindings/media/i2c/toshiba,tc358746.yaml | 157 ++++++++++++++++++ > 1 file changed, 157 insertions(+) > create mode 100644 Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > Reviewed-by: Rob Herring <robh@kernel.org>
Hi Marco, Thank you for the patch. On Thu, Aug 18, 2022 at 04:33:06PM +0200, Marco Felsch wrote: > Add the bindings for the Toshiba TC358746 Parallel <-> MIPI-CSI bridge > driver. > > Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> > --- > .../bindings/media/i2c/toshiba,tc358746.yaml | 157 ++++++++++++++++++ > 1 file changed, 157 insertions(+) > create mode 100644 Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > > diff --git a/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > new file mode 100644 > index 000000000000..9783cca363c6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > @@ -0,0 +1,157 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/media/i2c/toshiba,tc358746.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Toshiba TC358746 Parallel to MIPI CSI2 Bridge > + > +maintainers: > + - Marco Felsch <kernel@pengutronix.de> > + > +description: |- > + The Toshiba TC358746 converts a parallel video stream into a MIPI CSI-2 > + stream. The direction can be either parallel-in -> csi-out or csi-in -> > + parallel-out The chip is programmable trough I2C and SPI but the SPI > + interface is only supported in parallel-in -> csi-out mode. > + > + Note that the current device tree bindings only support the > + parallel-in -> csi-out path. > + > +properties: > + compatible: > + const: toshiba,tc358746 > + > + reg: > + maxItems: 1 > + > + clocks: > + description: > + The phandle to the reference clock source. This corresponds to the > + hardware pin REFCLK. > + maxItems: 1 > + > + clock-names: > + const: refclk As there's a single clock, should we omit the clock name ? > + > +# The bridge can act as clock provider for the sensor. To enable this support > +# #clock-cells must be specified. Attention if this feature is used than the s/than/then/ > +# mclk rate must be at least: (2 * link-frequency) / 8 > +# `------------------´ ^ > +# internal PLL rate smallest possible mclk-div Could this be captured in the description of the property instead of a comment ? > + "#clock-cells": > + const: 0 > + > + clock-output-names: > + description: > + The clock name of the MCLK output, the default name is tc358746-mclk. > + maxItems: 1 > + > + vddc-supply: > + description: Digital core voltage supply, 1.2 volts > + > + vddio-supply: > + description: Digital I/O voltage supply, 1.8 volts > + > + vddmipi-supply: > + description: MIPI CSI phy voltage supply, 1.2 volts > + > + reset-gpios: > + description: > + The phandle and specifier for the GPIO that controls the chip reset. > + This corresponds to the hardware pin RESX which is physically active low. > + maxItems: 1 > + > + ports: > + $ref: /schemas/graph.yaml#/properties/ports > + properties: > + port@0: > + $ref: /schemas/graph.yaml#/properties/port > + description: Input port Are the H/V sync signal polarities fixed, or should they be specified here ? Does the chip support external sync only, or also BT.656 ? In the latter case this needs a bus-type. > + > + port@1: > + $ref: /schemas/graph.yaml#/$defs/port-base > + description: Output port > + > + properties: > + endpoint: > + $ref: /schemas/media/video-interfaces.yaml# > + unevaluatedProperties: false > + > + properties: > + data-lanes: > + minItems: 1 > + maxItems: 4 > + > + clock-noncontinuous: true > + link-frequencies: true > + > + required: > + - data-lanes > + - link-frequencies > + > + required: > + - port@0 > + - port@1 > + > +required: > + - compatible > + - reg > + - clocks > + - clock-names > + - vddc-supply > + - vddio-supply > + - vddmipi-supply > + - ports > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + > + i2c { > + #address-cells = <1>; > + #size-cells = <0>; > + > + csi-bridge@e { > + compatible = "toshiba,tc358746"; > + reg = <0xe>; > + > + clocks = <&refclk>; > + clock-names = "refclk"; > + > + reset-gpios = <&gpio 2 GPIO_ACTIVE_LOW>; > + > + vddc-supply = <&v1_2d>; > + vddio-supply = <&v1_8d>; > + vddmipi-supply = <&v1_2d>; > + > + /* sensor mclk provider */ > + #clock-cells = <0>; > + > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + /* Input */ > + port@0 { > + reg = <0>; > + tc358746_in: endpoint { > + remote-endpoint = <&sensor_out>; > + }; Wrong indentation here. > + }; > + > + /* Output */ > + port@1 { > + reg = <1>; > + tc358746_out: endpoint { > + remote-endpoint = <&mipi_csi2_in>; > + data-lanes = <1 2>; > + clock-noncontinuous; > + link-frequencies = /bits/ 64 <216000000>; > + }; > + }; > + }; > + }; > + };
Hi Laurent, On 22-09-05, Laurent Pinchart wrote: > Hi Marco, > > Thank you for the patch. > > On Thu, Aug 18, 2022 at 04:33:06PM +0200, Marco Felsch wrote: > > Add the bindings for the Toshiba TC358746 Parallel <-> MIPI-CSI bridge > > driver. > > > > Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> > > --- > > .../bindings/media/i2c/toshiba,tc358746.yaml | 157 ++++++++++++++++++ > > 1 file changed, 157 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > > > > diff --git a/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > > new file mode 100644 > > index 000000000000..9783cca363c6 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > > @@ -0,0 +1,157 @@ > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/media/i2c/toshiba,tc358746.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Toshiba TC358746 Parallel to MIPI CSI2 Bridge > > + > > +maintainers: > > + - Marco Felsch <kernel@pengutronix.de> > > + > > +description: |- > > + The Toshiba TC358746 converts a parallel video stream into a MIPI CSI-2 > > + stream. The direction can be either parallel-in -> csi-out or csi-in -> > > + parallel-out The chip is programmable trough I2C and SPI but the SPI > > + interface is only supported in parallel-in -> csi-out mode. > > + > > + Note that the current device tree bindings only support the > > + parallel-in -> csi-out path. > > + > > +properties: > > + compatible: > > + const: toshiba,tc358746 > > + > > + reg: > > + maxItems: 1 > > + > > + clocks: > > + description: > > + The phandle to the reference clock source. This corresponds to the > > + hardware pin REFCLK. > > + maxItems: 1 > > + > > + clock-names: > > + const: refclk > > As there's a single clock, should we omit the clock name ? Don't know, I would rather keep it to make it explicite. Many other go that way too. > > +# The bridge can act as clock provider for the sensor. To enable this support > > +# #clock-cells must be specified. Attention if this feature is used than the > > s/than/then/ Sure, thanks. > > > +# mclk rate must be at least: (2 * link-frequency) / 8 > > +# `------------------´ ^ > > +# internal PLL rate smallest possible mclk-div > > Could this be captured in the description of the property instead of a > comment ? Hm.. a few (1,2) bindings using comments like this but I'm not against it. If it belongs to the description, which property should I use? Since there is no: clock-controller property like gpio-controller or interrupt-controller. The clock provider will be activated based on the #clock-cells property. But this property has nothing to with the description since this property specifies the cell size. > > + "#clock-cells": > > + const: 0 > > + > > + clock-output-names: > > + description: > > + The clock name of the MCLK output, the default name is tc358746-mclk. > > + maxItems: 1 > > + > > + vddc-supply: > > + description: Digital core voltage supply, 1.2 volts > > + > > + vddio-supply: > > + description: Digital I/O voltage supply, 1.8 volts > > + > > + vddmipi-supply: > > + description: MIPI CSI phy voltage supply, 1.2 volts > > + > > + reset-gpios: > > + description: > > + The phandle and specifier for the GPIO that controls the chip reset. > > + This corresponds to the hardware pin RESX which is physically active low. > > + maxItems: 1 > > + > > + ports: > > + $ref: /schemas/graph.yaml#/properties/ports > > + properties: > > + port@0: > > + $ref: /schemas/graph.yaml#/properties/port > > + description: Input port > > Are the H/V sync signal polarities fixed, or should they be specified > here ? At the moment they are fixed. I can describe it if you want. > Does the chip support external sync only, or also BT.656 ? In the > latter case this needs a bus-type. Yes, the chip also supports BT.656 but the driver doesn't support it yet. You're right, that we should make it explicite albeit it would a bit overhead yet since the only mode is: parallel-in with externa syncs. > > + > > + port@1: > > + $ref: /schemas/graph.yaml#/$defs/port-base > > + description: Output port > > + > > + properties: > > + endpoint: > > + $ref: /schemas/media/video-interfaces.yaml# > > + unevaluatedProperties: false > > + > > + properties: > > + data-lanes: > > + minItems: 1 > > + maxItems: 4 > > + > > + clock-noncontinuous: true > > + link-frequencies: true > > + > > + required: > > + - data-lanes > > + - link-frequencies > > + > > + required: > > + - port@0 > > + - port@1 > > + > > +required: > > + - compatible > > + - reg > > + - clocks > > + - clock-names > > + - vddc-supply > > + - vddio-supply > > + - vddmipi-supply > > + - ports > > + > > +additionalProperties: false > > + > > +examples: > > + - | > > + #include <dt-bindings/gpio/gpio.h> > > + > > + i2c { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + > > + csi-bridge@e { > > + compatible = "toshiba,tc358746"; > > + reg = <0xe>; > > + > > + clocks = <&refclk>; > > + clock-names = "refclk"; > > + > > + reset-gpios = <&gpio 2 GPIO_ACTIVE_LOW>; > > + > > + vddc-supply = <&v1_2d>; > > + vddio-supply = <&v1_8d>; > > + vddmipi-supply = <&v1_2d>; > > + > > + /* sensor mclk provider */ > > + #clock-cells = <0>; > > + > > + ports { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + > > + /* Input */ > > + port@0 { > > + reg = <0>; > > + tc358746_in: endpoint { > > + remote-endpoint = <&sensor_out>; > > + }; > > Wrong indentation here. Yes, thanks. Regards, Marco > > + }; > > + > > + /* Output */ > > + port@1 { > > + reg = <1>; > > + tc358746_out: endpoint { > > + remote-endpoint = <&mipi_csi2_in>; > > + data-lanes = <1 2>; > > + clock-noncontinuous; > > + link-frequencies = /bits/ 64 <216000000>; > > + }; > > + }; > > + }; > > + }; > > + }; > > -- > Regards, > > Laurent Pinchart >
Hi Marco, On Thu, Sep 15, 2022 at 03:19:33PM +0200, Marco Felsch wrote: > On 22-09-05, Laurent Pinchart wrote: > > On Thu, Aug 18, 2022 at 04:33:06PM +0200, Marco Felsch wrote: > > > Add the bindings for the Toshiba TC358746 Parallel <-> MIPI-CSI bridge > > > driver. > > > > > > Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> > > > --- > > > .../bindings/media/i2c/toshiba,tc358746.yaml | 157 ++++++++++++++++++ > > > 1 file changed, 157 insertions(+) > > > create mode 100644 Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > > > > > > diff --git a/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > > > new file mode 100644 > > > index 000000000000..9783cca363c6 > > > --- /dev/null > > > +++ b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml > > > @@ -0,0 +1,157 @@ > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > > +%YAML 1.2 > > > +--- > > > +$id: http://devicetree.org/schemas/media/i2c/toshiba,tc358746.yaml# > > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > > + > > > +title: Toshiba TC358746 Parallel to MIPI CSI2 Bridge > > > + > > > +maintainers: > > > + - Marco Felsch <kernel@pengutronix.de> > > > + > > > +description: |- > > > + The Toshiba TC358746 converts a parallel video stream into a MIPI CSI-2 > > > + stream. The direction can be either parallel-in -> csi-out or csi-in -> > > > + parallel-out The chip is programmable trough I2C and SPI but the SPI > > > + interface is only supported in parallel-in -> csi-out mode. > > > + > > > + Note that the current device tree bindings only support the > > > + parallel-in -> csi-out path. > > > + > > > +properties: > > > + compatible: > > > + const: toshiba,tc358746 > > > + > > > + reg: > > > + maxItems: 1 > > > + > > > + clocks: > > > + description: > > > + The phandle to the reference clock source. This corresponds to the > > > + hardware pin REFCLK. > > > + maxItems: 1 > > > + > > > + clock-names: > > > + const: refclk > > > > As there's a single clock, should we omit the clock name ? > > Don't know, I would rather keep it to make it explicite. Many other go > that way too. I don't mind either way. > > > +# The bridge can act as clock provider for the sensor. To enable this support > > > +# #clock-cells must be specified. Attention if this feature is used than the > > > > s/than/then/ > > Sure, thanks. > > > > +# mclk rate must be at least: (2 * link-frequency) / 8 > > > +# `------------------´ ^ > > > +# internal PLL rate smallest possible mclk-div > > > > Could this be captured in the description of the property instead of a > > comment ? > > Hm.. a few (1,2) bindings using comments like this but I'm not against > it. If it belongs to the description, which property should I use? Since > there is no: clock-controller property like gpio-controller or > interrupt-controller. The clock provider will be activated based on the > #clock-cells property. But this property has nothing to with the > description since this property specifies the cell size. I would have put it in the description of the #clock-cells property: "#clock-cells": description: | The bridge can act as clock provider for the sensor. To enable this support #clock-cells must be specified. Attention ... const: 0 but if it becomes an issue, I'm OK with the comment too. > > > + "#clock-cells": > > > + const: 0 > > > + > > > + clock-output-names: > > > + description: > > > + The clock name of the MCLK output, the default name is tc358746-mclk. > > > + maxItems: 1 > > > + > > > + vddc-supply: > > > + description: Digital core voltage supply, 1.2 volts > > > + > > > + vddio-supply: > > > + description: Digital I/O voltage supply, 1.8 volts > > > + > > > + vddmipi-supply: > > > + description: MIPI CSI phy voltage supply, 1.2 volts > > > + > > > + reset-gpios: > > > + description: > > > + The phandle and specifier for the GPIO that controls the chip reset. > > > + This corresponds to the hardware pin RESX which is physically active low. > > > + maxItems: 1 > > > + > > > + ports: > > > + $ref: /schemas/graph.yaml#/properties/ports > > > + properties: > > > + port@0: > > > + $ref: /schemas/graph.yaml#/properties/port > > > + description: Input port > > > > Are the H/V sync signal polarities fixed, or should they be specified > > here ? > > At the moment they are fixed. If the hardware supports different polarities, let's add them to the device tree binding, even if the driver only supports a single option at the moment. > I can describe it if you want. Thanks. > > Does the chip support external sync only, or also BT.656 ? In the > > latter case this needs a bus-type. > > Yes, the chip also supports BT.656 but the driver doesn't support it > yet. You're right, that we should make it explicite albeit it would a > bit overhead yet since the only mode is: parallel-in with externa syncs. Let's prepare for BT.656 support in the DT bindings, or we may regret it later :-) > > > + > > > + port@1: > > > + $ref: /schemas/graph.yaml#/$defs/port-base > > > + description: Output port > > > + > > > + properties: > > > + endpoint: > > > + $ref: /schemas/media/video-interfaces.yaml# > > > + unevaluatedProperties: false > > > + > > > + properties: > > > + data-lanes: > > > + minItems: 1 > > > + maxItems: 4 > > > + > > > + clock-noncontinuous: true > > > + link-frequencies: true > > > + > > > + required: > > > + - data-lanes > > > + - link-frequencies > > > + > > > + required: > > > + - port@0 > > > + - port@1 > > > + > > > +required: > > > + - compatible > > > + - reg > > > + - clocks > > > + - clock-names > > > + - vddc-supply > > > + - vddio-supply > > > + - vddmipi-supply > > > + - ports > > > + > > > +additionalProperties: false > > > + > > > +examples: > > > + - | > > > + #include <dt-bindings/gpio/gpio.h> > > > + > > > + i2c { > > > + #address-cells = <1>; > > > + #size-cells = <0>; > > > + > > > + csi-bridge@e { > > > + compatible = "toshiba,tc358746"; > > > + reg = <0xe>; > > > + > > > + clocks = <&refclk>; > > > + clock-names = "refclk"; > > > + > > > + reset-gpios = <&gpio 2 GPIO_ACTIVE_LOW>; > > > + > > > + vddc-supply = <&v1_2d>; > > > + vddio-supply = <&v1_8d>; > > > + vddmipi-supply = <&v1_2d>; > > > + > > > + /* sensor mclk provider */ > > > + #clock-cells = <0>; > > > + > > > + ports { > > > + #address-cells = <1>; > > > + #size-cells = <0>; > > > + > > > + /* Input */ > > > + port@0 { > > > + reg = <0>; > > > + tc358746_in: endpoint { > > > + remote-endpoint = <&sensor_out>; > > > + }; > > > > Wrong indentation here. > > Yes, thanks. > > > > + }; > > > + > > > + /* Output */ > > > + port@1 { > > > + reg = <1>; > > > + tc358746_out: endpoint { > > > + remote-endpoint = <&mipi_csi2_in>; > > > + data-lanes = <1 2>; > > > + clock-noncontinuous; > > > + link-frequencies = /bits/ 64 <216000000>; > > > + }; > > > + }; > > > + }; > > > + }; > > > + };
diff --git a/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml new file mode 100644 index 000000000000..9783cca363c6 --- /dev/null +++ b/Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml @@ -0,0 +1,157 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/i2c/toshiba,tc358746.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Toshiba TC358746 Parallel to MIPI CSI2 Bridge + +maintainers: + - Marco Felsch <kernel@pengutronix.de> + +description: |- + The Toshiba TC358746 converts a parallel video stream into a MIPI CSI-2 + stream. The direction can be either parallel-in -> csi-out or csi-in -> + parallel-out The chip is programmable trough I2C and SPI but the SPI + interface is only supported in parallel-in -> csi-out mode. + + Note that the current device tree bindings only support the + parallel-in -> csi-out path. + +properties: + compatible: + const: toshiba,tc358746 + + reg: + maxItems: 1 + + clocks: + description: + The phandle to the reference clock source. This corresponds to the + hardware pin REFCLK. + maxItems: 1 + + clock-names: + const: refclk + +# The bridge can act as clock provider for the sensor. To enable this support +# #clock-cells must be specified. Attention if this feature is used than the +# mclk rate must be at least: (2 * link-frequency) / 8 +# `------------------´ ^ +# internal PLL rate smallest possible mclk-div + "#clock-cells": + const: 0 + + clock-output-names: + description: + The clock name of the MCLK output, the default name is tc358746-mclk. + maxItems: 1 + + vddc-supply: + description: Digital core voltage supply, 1.2 volts + + vddio-supply: + description: Digital I/O voltage supply, 1.8 volts + + vddmipi-supply: + description: MIPI CSI phy voltage supply, 1.2 volts + + reset-gpios: + description: + The phandle and specifier for the GPIO that controls the chip reset. + This corresponds to the hardware pin RESX which is physically active low. + maxItems: 1 + + ports: + $ref: /schemas/graph.yaml#/properties/ports + properties: + port@0: + $ref: /schemas/graph.yaml#/properties/port + description: Input port + + port@1: + $ref: /schemas/graph.yaml#/$defs/port-base + description: Output port + + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + data-lanes: + minItems: 1 + maxItems: 4 + + clock-noncontinuous: true + link-frequencies: true + + required: + - data-lanes + - link-frequencies + + required: + - port@0 + - port@1 + +required: + - compatible + - reg + - clocks + - clock-names + - vddc-supply + - vddio-supply + - vddmipi-supply + - ports + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + csi-bridge@e { + compatible = "toshiba,tc358746"; + reg = <0xe>; + + clocks = <&refclk>; + clock-names = "refclk"; + + reset-gpios = <&gpio 2 GPIO_ACTIVE_LOW>; + + vddc-supply = <&v1_2d>; + vddio-supply = <&v1_8d>; + vddmipi-supply = <&v1_2d>; + + /* sensor mclk provider */ + #clock-cells = <0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + /* Input */ + port@0 { + reg = <0>; + tc358746_in: endpoint { + remote-endpoint = <&sensor_out>; + }; + }; + + /* Output */ + port@1 { + reg = <1>; + tc358746_out: endpoint { + remote-endpoint = <&mipi_csi2_in>; + data-lanes = <1 2>; + clock-noncontinuous; + link-frequencies = /bits/ 64 <216000000>; + }; + }; + }; + }; + };
Add the bindings for the Toshiba TC358746 Parallel <-> MIPI-CSI bridge driver. Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> --- .../bindings/media/i2c/toshiba,tc358746.yaml | 157 ++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/toshiba,tc358746.yaml