| Message ID | 20171205103356.9917-2-architt@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Delegated to: | Andy Gross |
| Headers | show |
On Tue, Dec 05, 2017 at 04:03:55PM +0530, Archit Taneja wrote: > Add a section that describes dt-bindings for peripherals that support > MIPI DSI, but have a different bus as the primary control bus. Add an > example for such peripherals. > > Signed-off-by: Archit Taneja <architt@codeaurora.org> > --- > .../devicetree/bindings/display/mipi-dsi-bus.txt | 75 ++++++++++++++++++++-- > 1 file changed, 68 insertions(+), 7 deletions(-) > > diff --git a/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt b/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt > index 973c27273772..77a7cec15f5b 100644 > --- a/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt > +++ b/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt > @@ -16,7 +16,7 @@ The following assumes that only a single peripheral is connected to a DSI > host. Experience shows that this is true for the large majority of setups. > > DSI host > --------- > +======== > > In addition to the standard properties and those defined by the parent bus of > a DSI host, the following properties apply to a node representing a DSI host. > @@ -30,11 +30,15 @@ Required properties: > different value here. See below. > > DSI peripheral > --------------- > +============== > > -Peripherals are represented as child nodes of the DSI host's node. Properties > -described here apply to all DSI peripherals, but individual bindings may want > -to define additional, device-specific properties. > +Peripherals with DSI as control bus > +------------------------------------ > + > +Peripherals with the DSI bus as the primary control path are represented as > +child nodes of the DSI host's node. Properties described here apply to all DSI > +peripherals, but individual bindings may want to define additional, > +device-specific properties. Are there any panels with no control bus? I've never seen one, but it should be possible if LVDS panels can power on without commands. > Required properties: > - reg: The virtual channel number of a DSI peripheral. Must be in the range > @@ -49,9 +53,25 @@ case two alternative representations can be chosen: > property is the number of the first virtual channel and the second cell is > the number of consecutive virtual channels. > > -Example > -------- > +Peripherals with a different control bus > +---------------------------------------- > + > +There are peripherals that have I2C/SPI (or some other non-DSI bus) as the > +primary control bus, but are also connected to a DSI bus (mostly for the data > +path). Connections between such peripherals and a DSI host can be represented > +using the graph bindings [1], [2]. > + > +[1] Documentation/devicetree/bindings/graph.txt > +[2] Documentation/devicetree/bindings/media/video-interfaces.txt > > +Examples > +======== > +- (1), (2) and (3) are examples of a DSI host and peripheral on the DSI bus > + with different virtual channel configurations. > +- (4) is an example of a peripheral on a I2C control bus connected with to > + a DSI host using of-graph bindings. > + > +1) > dsi-host { > ... > > @@ -67,6 +87,7 @@ Example > ... > }; > > +2) > dsi-host { > ... > > @@ -82,6 +103,7 @@ Example > ... > }; > > +3) > dsi-host { > ... > > @@ -96,3 +118,42 @@ Example > > ... > }; > + > +4) > + i2c-host { > + ... > + > + dsi-bridge@35 { > + compatible = "..."; > + reg = <0x35>; > + > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + ... > + > + port@0 { Drop unit-address and #*-cells. > + bridge_mipi_in: endpoint { > + remote-endpoint = <&host_mipi_out>; > + }; > + }; > + }; > + }; > + }; > + > + dsi-host { > + ... > + > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + ... > + > + port@0 { Drop unit-address and #*-cells. > + host_mipi_out: endpoint { > + remote-endpoint = <&bridge_mipi_in>; > + }; > + }; > + }; > + }; > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > hosted by The Linux Foundation > -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 12/07/2017 03:09 AM, Rob Herring wrote: > On Tue, Dec 05, 2017 at 04:03:55PM +0530, Archit Taneja wrote: >> Add a section that describes dt-bindings for peripherals that support >> MIPI DSI, but have a different bus as the primary control bus. Add an >> example for such peripherals. >> >> Signed-off-by: Archit Taneja <architt@codeaurora.org> >> --- >> .../devicetree/bindings/display/mipi-dsi-bus.txt | 75 ++++++++++++++++++++-- >> 1 file changed, 68 insertions(+), 7 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt b/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt >> index 973c27273772..77a7cec15f5b 100644 >> --- a/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt >> +++ b/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt >> @@ -16,7 +16,7 @@ The following assumes that only a single peripheral is connected to a DSI >> host. Experience shows that this is true for the large majority of setups. >> >> DSI host >> --------- >> +======== >> >> In addition to the standard properties and those defined by the parent bus of >> a DSI host, the following properties apply to a node representing a DSI host. >> @@ -30,11 +30,15 @@ Required properties: >> different value here. See below. >> >> DSI peripheral >> --------------- >> +============== >> >> -Peripherals are represented as child nodes of the DSI host's node. Properties >> -described here apply to all DSI peripherals, but individual bindings may want >> -to define additional, device-specific properties. >> +Peripherals with DSI as control bus >> +------------------------------------ >> + >> +Peripherals with the DSI bus as the primary control path are represented as >> +child nodes of the DSI host's node. Properties described here apply to all DSI >> +peripherals, but individual bindings may want to define additional, >> +device-specific properties. > > Are there any panels with no control bus? I've never seen one, but it > should be possible if LVDS panels can power on without commands. DSI panels generally require sending at least a couple of DCS commands to be exit sleep mode and get powered on. I guess I can rewrite the above paragraph to include peripherals which have no control bus at all. > >> Required properties: >> - reg: The virtual channel number of a DSI peripheral. Must be in the range >> @@ -49,9 +53,25 @@ case two alternative representations can be chosen: >> property is the number of the first virtual channel and the second cell is >> the number of consecutive virtual channels. >> >> -Example >> -------- >> +Peripherals with a different control bus >> +---------------------------------------- >> + >> +There are peripherals that have I2C/SPI (or some other non-DSI bus) as the >> +primary control bus, but are also connected to a DSI bus (mostly for the data >> +path). Connections between such peripherals and a DSI host can be represented >> +using the graph bindings [1], [2]. >> + >> +[1] Documentation/devicetree/bindings/graph.txt >> +[2] Documentation/devicetree/bindings/media/video-interfaces.txt >> >> +Examples >> +======== >> +- (1), (2) and (3) are examples of a DSI host and peripheral on the DSI bus >> + with different virtual channel configurations. >> +- (4) is an example of a peripheral on a I2C control bus connected with to >> + a DSI host using of-graph bindings. >> + >> +1) >> dsi-host { >> ... >> >> @@ -67,6 +87,7 @@ Example >> ... >> }; >> >> +2) >> dsi-host { >> ... >> >> @@ -82,6 +103,7 @@ Example >> ... >> }; >> >> +3) >> dsi-host { >> ... >> >> @@ -96,3 +118,42 @@ Example >> >> ... >> }; >> + >> +4) >> + i2c-host { >> + ... >> + >> + dsi-bridge@35 { >> + compatible = "..."; >> + reg = <0x35>; >> + >> + ports { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + ... >> + >> + port@0 { > > Drop unit-address and #*-cells. > >> + bridge_mipi_in: endpoint { >> + remote-endpoint = <&host_mipi_out>; >> + }; >> + }; >> + }; >> + }; >> + }; >> + >> + dsi-host { >> + ... >> + >> + ports { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + ... >> + >> + port@0 { > > Drop unit-address and #*-cells. Thanks, I'll fix these and the similar comments in the second patch. Archit
diff --git a/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt b/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt index 973c27273772..77a7cec15f5b 100644 --- a/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt +++ b/Documentation/devicetree/bindings/display/mipi-dsi-bus.txt @@ -16,7 +16,7 @@ The following assumes that only a single peripheral is connected to a DSI host. Experience shows that this is true for the large majority of setups. DSI host --------- +======== In addition to the standard properties and those defined by the parent bus of a DSI host, the following properties apply to a node representing a DSI host. @@ -30,11 +30,15 @@ Required properties: different value here. See below. DSI peripheral --------------- +============== -Peripherals are represented as child nodes of the DSI host's node. Properties -described here apply to all DSI peripherals, but individual bindings may want -to define additional, device-specific properties. +Peripherals with DSI as control bus +------------------------------------ + +Peripherals with the DSI bus as the primary control path are represented as +child nodes of the DSI host's node. Properties described here apply to all DSI +peripherals, but individual bindings may want to define additional, +device-specific properties. Required properties: - reg: The virtual channel number of a DSI peripheral. Must be in the range @@ -49,9 +53,25 @@ case two alternative representations can be chosen: property is the number of the first virtual channel and the second cell is the number of consecutive virtual channels. -Example -------- +Peripherals with a different control bus +---------------------------------------- + +There are peripherals that have I2C/SPI (or some other non-DSI bus) as the +primary control bus, but are also connected to a DSI bus (mostly for the data +path). Connections between such peripherals and a DSI host can be represented +using the graph bindings [1], [2]. + +[1] Documentation/devicetree/bindings/graph.txt +[2] Documentation/devicetree/bindings/media/video-interfaces.txt +Examples +======== +- (1), (2) and (3) are examples of a DSI host and peripheral on the DSI bus + with different virtual channel configurations. +- (4) is an example of a peripheral on a I2C control bus connected with to + a DSI host using of-graph bindings. + +1) dsi-host { ... @@ -67,6 +87,7 @@ Example ... }; +2) dsi-host { ... @@ -82,6 +103,7 @@ Example ... }; +3) dsi-host { ... @@ -96,3 +118,42 @@ Example ... }; + +4) + i2c-host { + ... + + dsi-bridge@35 { + compatible = "..."; + reg = <0x35>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + ... + + port@0 { + bridge_mipi_in: endpoint { + remote-endpoint = <&host_mipi_out>; + }; + }; + }; + }; + }; + + dsi-host { + ... + + ports { + #address-cells = <1>; + #size-cells = <0>; + ... + + port@0 { + host_mipi_out: endpoint { + remote-endpoint = <&bridge_mipi_in>; + }; + }; + }; + };
Add a section that describes dt-bindings for peripherals that support MIPI DSI, but have a different bus as the primary control bus. Add an example for such peripherals. Signed-off-by: Archit Taneja <architt@codeaurora.org> --- .../devicetree/bindings/display/mipi-dsi-bus.txt | 75 ++++++++++++++++++++-- 1 file changed, 68 insertions(+), 7 deletions(-)