| Message ID | 1612420939-15502-2-git-send-email-mkrishn@codeaurora.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v10,1/4] dt-bindings: msm: disp: add yaml schemas for DPU bindings | expand |
Quoting Krishna Manikandan (2021-02-03 22:42:17) > Add YAML schema for the device tree bindings for DSI > controller. > > Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org> > > Changes in v1: > - Separate dsi controller bindings to a separate patch (Stephen Boyd) > - Merge dsi-common-controller.yaml and dsi-controller-main.yaml to > a single file (Stephen Boyd) > - Drop supply entries and definitions from properties (Stephen Boyd) > - Modify phy-names property for dsi controller (Stephen Boyd) > - Remove boolean from description (Stephen Boyd) > - Drop pinctrl properties as they are standard entries (Stephen Boyd) > - Modify the description for ports property and keep the reference > to the generic binding where this is defined (Stephen Boyd) > - Add description to clock names (Stephen Boyd) > - Correct the indendation (Stephen Boyd) > - Drop the label for display dt nodes and correct the node > name (Stephen Boyd) > --- > .../bindings/display/msm/dsi-controller-main.yaml | 233 +++++++++++++++++++ > .../devicetree/bindings/display/msm/dsi.txt | 249 --------------------- > 2 files changed, 233 insertions(+), 249 deletions(-) > create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml > delete mode 100644 Documentation/devicetree/bindings/display/msm/dsi.txt > > diff --git a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml > new file mode 100644 > index 0000000..9177d01 > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml > @@ -0,0 +1,233 @@ > +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/display/msm/dsi-controller-main.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Description of Qualcomm Display DSI controller dt properties > + > +maintainers: > + - Krishna Manikandan <mkrishn@codeaurora.org> > + > +description: | > + Common Device tree bindings for DSI controller. > + > +allOf: > + - $ref: "../dsi-controller.yaml#" > + > +properties: > + compatible: > + items: > + - const: qcom,mdss-dsi-ctrl > + > + reg: > + maxItems: 1 > + > + reg-names: > + const: dsi_ctrl > + > + interrupts: > + maxItems: 1 > + > + clocks: > + maxItems: 6 Drop maxItems? Or are some clks optional sometimes? > + items: > + - description: Display byte clock > + - description: Display byte interface clock > + - description: Display pixel clock > + - description: Display escape clock > + - description: Display AHB clock > + - description: Display AXI clock > + > + clock-names: > + items: > + - const: byte > + - const: byte_intf > + - const: pixel > + - const: core > + - const: iface > + - const: bus > + > + phys: > + minItems: 1 > + > + phy-names: > + const: dsi > + > + syscon-sfpb: > + description: A phandle to mmss_sfpb syscon node (only for DSIv2). > + $ref: "/schemas/types.yaml#/definitions/phandle" > + > + qcom,mdss-mdp-transfer-time-us: > + description: | > + Specifies the DSI transfer time for command mode > + panels in microseconds. Driver uses this number to adjust > + the clock rate according to the expected transfer time. > + Increasing this value would slow down the mdp processing > + and can result in slower performance. > + Decreasing this value can speed up the mdp processing, > + but this can also impact power consumption. > + As a rule this time should not be higher than the time > + that would be expected with the processing at the > + DSI link rate since anyways this would be the maximum > + transfer time that could be achieved. > + If ping pong split is enabled, this time should not be higher > + than two times the DSI link rate time. > + This is an optional property. > + default: 14000 Why is this in DT vs. being tweaked from userspace? This was there before but it isn't used anywhere in an upstream DTS file so please drop it. > + > + qcom,dual-dsi-mode: > + type: boolean > + description: | > + Indicates if the DSI controller is driving a panel which needs > + 2 DSI links. Shouldn't this be apparent from the OF graph indicating two DSI endpoints? > + > + qcom,master-dsi: > + type: boolean > + description: | > + Indicates if the DSI controller is driving the master link of > + the 2-DSI panel. When is this not the case? This property looks like some sort of workaround for driver probe ordering. It was there before though so I guess this is fine. > + > + qcom,sync-dual-dsi: > + type: boolean > + description: | > + Indicates if the DSI controller is driving a 2-DSI panel whose > + 2 links need receive command simultaneously. Feels like it should be a property of the panel node? > + > + ports: > + type: object > + description: | > + Contains DSI controller input and output ports as children, each > + containing one endpoint subnode as defined in > + Documentation/devicetree/bindings/graph.txt and > + Documentation/devicetree/bindings/media/video-interfaces.txt. > + > + properties: > + port@0: > + type: object > + description: | > + Input endpoints of the controller. > + > + properties: > + reg: > + const: 0 > + > + endpoint: > + type: object > + properties: > + remote-endpoint: > + description: | > + For port@0, set to phandle of the connected panel/bridge's > + input endpoint. For port@1, set to the MDP interface output. > + See Documentation/devicetree/bindings/graph.txt for > + device graph info. > + > + data-lanes: > + description: | > + This describes how the physical DSI data lanes are mapped > + to the logical lanes on the given platform. The value contained in > + index n describes what physical lane is mapped to the logical lane n > + (DATAn, where n lies between 0 and 3). The clock lane position is fixed > + and can't be changed. Hence, they aren't a part of the DT bindings. See > + Documentation/devicetree/bindings/media/video-interfaces.txt for > + more info on the data-lanes property. > + > + items: > + - const: 0 > + - const: 1 > + - const: 2 > + - const: 3 > + port@1: > + type: object > + description: | > + Output endpoints of the controller. > + properties: > + reg: > + const: 1 > + > + endpoint: > + type: object > + properties: > + remote-endpoint: true > + data-lanes: > + items: > + - const: 0 > + - const: 1 > + - const: 2 > + - const: 3 > + > +required: > + - compatible > + - reg > + - reg-names > + - interrupts > + - clocks > + - clock-names > + - phys > + - phy-names > + - ports > + > +unevaluatedProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/clock/qcom,dispcc-sdm845.h> > + #include <dt-bindings/clock/qcom,gcc-sdm845.h> > + > + soc { > + #address-cells = <2>; > + #size-cells = <2>; The soc node can be left out. > + > + mdss@ae00000 { subsystem? > + #address-cells = <2>; > + #size-cells = <2>; > + reg = <0 0xae00000 0 0x1000>; > + interrupt-controller; > + #interrupt-cells = <1>; > + > + dsi@ae94000 { > + compatible = "qcom,mdss-dsi-ctrl";
On 2021-02-06 04:04, Stephen Boyd wrote: > Quoting Krishna Manikandan (2021-02-03 22:42:17) >> Add YAML schema for the device tree bindings for DSI >> controller. >> >> Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org> >> >> Changes in v1: >> - Separate dsi controller bindings to a separate patch (Stephen >> Boyd) >> - Merge dsi-common-controller.yaml and dsi-controller-main.yaml to >> a single file (Stephen Boyd) >> - Drop supply entries and definitions from properties (Stephen >> Boyd) >> - Modify phy-names property for dsi controller (Stephen Boyd) >> - Remove boolean from description (Stephen Boyd) >> - Drop pinctrl properties as they are standard entries (Stephen >> Boyd) >> - Modify the description for ports property and keep the reference >> to the generic binding where this is defined (Stephen Boyd) >> - Add description to clock names (Stephen Boyd) >> - Correct the indendation (Stephen Boyd) >> - Drop the label for display dt nodes and correct the node >> name (Stephen Boyd) >> --- >> .../bindings/display/msm/dsi-controller-main.yaml | 233 >> +++++++++++++++++++ >> .../devicetree/bindings/display/msm/dsi.txt | 249 >> --------------------- >> 2 files changed, 233 insertions(+), 249 deletions(-) >> create mode 100644 >> Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml >> delete mode 100644 >> Documentation/devicetree/bindings/display/msm/dsi.txt >> >> diff --git >> a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml >> b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml >> new file mode 100644 >> index 0000000..9177d01 >> --- /dev/null >> +++ >> b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml >> @@ -0,0 +1,233 @@ >> +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause >> +%YAML 1.2 >> +--- >> +$id: >> http://devicetree.org/schemas/display/msm/dsi-controller-main.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Description of Qualcomm Display DSI controller dt properties >> + >> +maintainers: >> + - Krishna Manikandan <mkrishn@codeaurora.org> >> + >> +description: | >> + Common Device tree bindings for DSI controller. >> + >> +allOf: >> + - $ref: "../dsi-controller.yaml#" >> + >> +properties: >> + compatible: >> + items: >> + - const: qcom,mdss-dsi-ctrl >> + >> + reg: >> + maxItems: 1 >> + >> + reg-names: >> + const: dsi_ctrl >> + >> + interrupts: >> + maxItems: 1 >> + >> + clocks: >> + maxItems: 6 > > Drop maxItems? Or are some clks optional sometimes? > >> + items: >> + - description: Display byte clock >> + - description: Display byte interface clock >> + - description: Display pixel clock >> + - description: Display escape clock >> + - description: Display AHB clock >> + - description: Display AXI clock >> + >> + clock-names: >> + items: >> + - const: byte >> + - const: byte_intf >> + - const: pixel >> + - const: core >> + - const: iface >> + - const: bus >> + >> + phys: >> + minItems: 1 >> + >> + phy-names: >> + const: dsi >> + >> + syscon-sfpb: >> + description: A phandle to mmss_sfpb syscon node (only for DSIv2). >> + $ref: "/schemas/types.yaml#/definitions/phandle" >> + >> + qcom,mdss-mdp-transfer-time-us: >> + description: | >> + Specifies the DSI transfer time for command mode >> + panels in microseconds. Driver uses this number to adjust >> + the clock rate according to the expected transfer time. >> + Increasing this value would slow down the mdp processing >> + and can result in slower performance. >> + Decreasing this value can speed up the mdp processing, >> + but this can also impact power consumption. >> + As a rule this time should not be higher than the time >> + that would be expected with the processing at the >> + DSI link rate since anyways this would be the maximum >> + transfer time that could be achieved. >> + If ping pong split is enabled, this time should not be higher >> + than two times the DSI link rate time. >> + This is an optional property. >> + default: 14000 > > Why is this in DT vs. being tweaked from userspace? This was there > before but it isn't used anywhere in an upstream DTS file so please > drop > it. > >> + >> + qcom,dual-dsi-mode: >> + type: boolean >> + description: | >> + Indicates if the DSI controller is driving a panel which needs >> + 2 DSI links. > > Shouldn't this be apparent from the OF graph indicating two DSI > endpoints? Yes Stephen, you are correct. But these properties ( qcom,dual-dsi-mode and qcom,master-dsi) are defined in sdm845 dtsi file and the current code is parsing these properties during dsi probe. That is why I defined these properties here. > >> + >> + qcom,master-dsi: >> + type: boolean >> + description: | >> + Indicates if the DSI controller is driving the master link of >> + the 2-DSI panel. > > When is this not the case? This property looks like some sort of > workaround for driver probe ordering. It was there before though so I > guess this is fine. > >> + >> + qcom,sync-dual-dsi: >> + type: boolean >> + description: | >> + Indicates if the DSI controller is driving a 2-DSI panel whose >> + 2 links need receive command simultaneously. > > Feels like it should be a property of the panel node? We are not using this property in any of the targets. I will remove this property. > >> + >> + ports: >> + type: object >> + description: | >> + Contains DSI controller input and output ports as children, >> each >> + containing one endpoint subnode as defined in >> + Documentation/devicetree/bindings/graph.txt and >> + Documentation/devicetree/bindings/media/video-interfaces.txt. >> + >> + properties: >> + port@0: >> + type: object >> + description: | >> + Input endpoints of the controller. >> + >> + properties: >> + reg: >> + const: 0 >> + >> + endpoint: >> + type: object >> + properties: >> + remote-endpoint: >> + description: | >> + For port@0, set to phandle of the connected >> panel/bridge's >> + input endpoint. For port@1, set to the MDP >> interface output. >> + See Documentation/devicetree/bindings/graph.txt for >> + device graph info. >> + >> + data-lanes: >> + description: | >> + This describes how the physical DSI data lanes are >> mapped >> + to the logical lanes on the given platform. The >> value contained in >> + index n describes what physical lane is mapped to >> the logical lane n >> + (DATAn, where n lies between 0 and 3). The clock >> lane position is fixed >> + and can't be changed. Hence, they aren't a part of >> the DT bindings. See >> + >> Documentation/devicetree/bindings/media/video-interfaces.txt for >> + more info on the data-lanes property. >> + >> + items: >> + - const: 0 >> + - const: 1 >> + - const: 2 >> + - const: 3 >> + port@1: >> + type: object >> + description: | >> + Output endpoints of the controller. >> + properties: >> + reg: >> + const: 1 >> + >> + endpoint: >> + type: object >> + properties: >> + remote-endpoint: true >> + data-lanes: >> + items: >> + - const: 0 >> + - const: 1 >> + - const: 2 >> + - const: 3 >> + >> +required: >> + - compatible >> + - reg >> + - reg-names >> + - interrupts >> + - clocks >> + - clock-names >> + - phys >> + - phy-names >> + - ports >> + >> +unevaluatedProperties: false >> + >> +examples: >> + - | >> + #include <dt-bindings/interrupt-controller/arm-gic.h> >> + #include <dt-bindings/clock/qcom,dispcc-sdm845.h> >> + #include <dt-bindings/clock/qcom,gcc-sdm845.h> >> + >> + soc { >> + #address-cells = <2>; >> + #size-cells = <2>; > > The soc node can be left out. Should I follow the same approach that you suggested in DP yaml patch here also ? ie. soc { #address-cells = <2>; #size-cells = <2>; dsi@ae9400000{ ... } } Link : https://patchwork.kernel.org/project/linux-arm-msm/patch/1612420939-15502-4-git-send-email-mkrishn@codeaurora.org/ Comment: Please look at section "2.2.2 Generic Names Recommendation" of the DT spec[1] to find a proper name. I don't see 'subsystem' there but that may be because it shouldn't really exist as a node. Instead we should have the child nodes sit directly under the SoC node. > >> + >> + mdss@ae00000 { > > subsystem? > >> + #address-cells = <2>; >> + #size-cells = <2>; >> + reg = <0 0xae00000 0 0x1000>; >> + interrupt-controller; >> + #interrupt-cells = <1>; >> + >> + dsi@ae94000 { >> + compatible = "qcom,mdss-dsi-ctrl";
Quoting mkrishn@codeaurora.org (2021-02-09 02:53:41) > On 2021-02-06 04:04, Stephen Boyd wrote: > >> + - interrupts > >> + - clocks > >> + - clock-names > >> + - phys > >> + - phy-names > >> + - ports > >> + > >> +unevaluatedProperties: false > >> + > >> +examples: > >> + - | > >> + #include <dt-bindings/interrupt-controller/arm-gic.h> > >> + #include <dt-bindings/clock/qcom,dispcc-sdm845.h> > >> + #include <dt-bindings/clock/qcom,gcc-sdm845.h> > >> + > >> + soc { > >> + #address-cells = <2>; > >> + #size-cells = <2>; > > > > The soc node can be left out. > Should I follow the same approach that you suggested in DP yaml patch > here also ? > ie. soc { > #address-cells = <2>; > #size-cells = <2>; > > dsi@ae9400000{ > ... > } > } Yes. > Link : > https://patchwork.kernel.org/project/linux-arm-msm/patch/1612420939-15502-4-git-send-email-mkrishn@codeaurora.org/ > Comment: > Please look at section "2.2.2 Generic Names Recommendation" > of the DT > spec[1] to find a proper name. I don't see 'subsystem' there > but that > may be because it shouldn't really exist as a node. Instead > we should > have the child nodes sit directly under the SoC node.
diff --git a/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml new file mode 100644 index 0000000..9177d01 --- /dev/null +++ b/Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml @@ -0,0 +1,233 @@ +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/msm/dsi-controller-main.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Description of Qualcomm Display DSI controller dt properties + +maintainers: + - Krishna Manikandan <mkrishn@codeaurora.org> + +description: | + Common Device tree bindings for DSI controller. + +allOf: + - $ref: "../dsi-controller.yaml#" + +properties: + compatible: + items: + - const: qcom,mdss-dsi-ctrl + + reg: + maxItems: 1 + + reg-names: + const: dsi_ctrl + + interrupts: + maxItems: 1 + + clocks: + maxItems: 6 + items: + - description: Display byte clock + - description: Display byte interface clock + - description: Display pixel clock + - description: Display escape clock + - description: Display AHB clock + - description: Display AXI clock + + clock-names: + items: + - const: byte + - const: byte_intf + - const: pixel + - const: core + - const: iface + - const: bus + + phys: + minItems: 1 + + phy-names: + const: dsi + + syscon-sfpb: + description: A phandle to mmss_sfpb syscon node (only for DSIv2). + $ref: "/schemas/types.yaml#/definitions/phandle" + + qcom,mdss-mdp-transfer-time-us: + description: | + Specifies the DSI transfer time for command mode + panels in microseconds. Driver uses this number to adjust + the clock rate according to the expected transfer time. + Increasing this value would slow down the mdp processing + and can result in slower performance. + Decreasing this value can speed up the mdp processing, + but this can also impact power consumption. + As a rule this time should not be higher than the time + that would be expected with the processing at the + DSI link rate since anyways this would be the maximum + transfer time that could be achieved. + If ping pong split is enabled, this time should not be higher + than two times the DSI link rate time. + This is an optional property. + default: 14000 + + qcom,dual-dsi-mode: + type: boolean + description: | + Indicates if the DSI controller is driving a panel which needs + 2 DSI links. + + qcom,master-dsi: + type: boolean + description: | + Indicates if the DSI controller is driving the master link of + the 2-DSI panel. + + qcom,sync-dual-dsi: + type: boolean + description: | + Indicates if the DSI controller is driving a 2-DSI panel whose + 2 links need receive command simultaneously. + + ports: + type: object + description: | + Contains DSI controller input and output ports as children, each + containing one endpoint subnode as defined in + Documentation/devicetree/bindings/graph.txt and + Documentation/devicetree/bindings/media/video-interfaces.txt. + + properties: + port@0: + type: object + description: | + Input endpoints of the controller. + + properties: + reg: + const: 0 + + endpoint: + type: object + properties: + remote-endpoint: + description: | + For port@0, set to phandle of the connected panel/bridge's + input endpoint. For port@1, set to the MDP interface output. + See Documentation/devicetree/bindings/graph.txt for + device graph info. + + data-lanes: + description: | + This describes how the physical DSI data lanes are mapped + to the logical lanes on the given platform. The value contained in + index n describes what physical lane is mapped to the logical lane n + (DATAn, where n lies between 0 and 3). The clock lane position is fixed + and can't be changed. Hence, they aren't a part of the DT bindings. See + Documentation/devicetree/bindings/media/video-interfaces.txt for + more info on the data-lanes property. + + items: + - const: 0 + - const: 1 + - const: 2 + - const: 3 + port@1: + type: object + description: | + Output endpoints of the controller. + properties: + reg: + const: 1 + + endpoint: + type: object + properties: + remote-endpoint: true + data-lanes: + items: + - const: 0 + - const: 1 + - const: 2 + - const: 3 + +required: + - compatible + - reg + - reg-names + - interrupts + - clocks + - clock-names + - phys + - phy-names + - ports + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/clock/qcom,dispcc-sdm845.h> + #include <dt-bindings/clock/qcom,gcc-sdm845.h> + + soc { + #address-cells = <2>; + #size-cells = <2>; + + mdss@ae00000 { + #address-cells = <2>; + #size-cells = <2>; + reg = <0 0xae00000 0 0x1000>; + interrupt-controller; + #interrupt-cells = <1>; + + dsi@ae94000 { + compatible = "qcom,mdss-dsi-ctrl"; + reg = <0 0x0ae94000 0 0x400>; + reg-names = "dsi_ctrl"; + + interrupt-parent = <&mdss>; + interrupts = <4>; + + clocks = <&dispcc DISP_CC_MDSS_BYTE0_CLK>, + <&dispcc DISP_CC_MDSS_BYTE0_INTF_CLK>, + <&dispcc DISP_CC_MDSS_PCLK0_CLK>, + <&dispcc DISP_CC_MDSS_ESC0_CLK>, + <&dispcc DISP_CC_MDSS_AHB_CLK>, + <&dispcc DISP_CC_MDSS_AXI_CLK>; + clock-names = "byte", + "byte_intf", + "pixel", + "core", + "iface", + "bus"; + + phys = <&dsi0_phy>; + phy-names = "dsi"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + dsi0_in: endpoint { + remote-endpoint = <&dpu_intf1_out>; + }; + }; + + port@1 { + reg = <1>; + dsi0_out: endpoint { + }; + }; + }; + }; + }; + }; +... diff --git a/Documentation/devicetree/bindings/display/msm/dsi.txt b/Documentation/devicetree/bindings/display/msm/dsi.txt deleted file mode 100644 index b9a64d3..0000000 --- a/Documentation/devicetree/bindings/display/msm/dsi.txt +++ /dev/null @@ -1,249 +0,0 @@ -Qualcomm Technologies Inc. adreno/snapdragon DSI output - -DSI Controller: -Required properties: -- compatible: - * "qcom,mdss-dsi-ctrl" -- reg: Physical base address and length of the registers of controller -- reg-names: The names of register regions. The following regions are required: - * "dsi_ctrl" -- interrupts: The interrupt signal from the DSI block. -- power-domains: Should be <&mmcc MDSS_GDSC>. -- clocks: Phandles to device clocks. -- clock-names: the following clocks are required: - * "mdp_core" - * "iface" - * "bus" - * "core_mmss" - * "byte" - * "pixel" - * "core" - For DSIv2, we need an additional clock: - * "src" - For DSI6G v2.0 onwards, we need also need the clock: - * "byte_intf" -- assigned-clocks: Parents of "byte" and "pixel" for the given platform. -- assigned-clock-parents: The Byte clock and Pixel clock PLL outputs provided - by a DSI PHY block. See [1] for details on clock bindings. -- vdd-supply: phandle to vdd regulator device node -- vddio-supply: phandle to vdd-io regulator device node -- vdda-supply: phandle to vdda regulator device node -- phys: phandle to DSI PHY device node -- phy-names: the name of the corresponding PHY device -- syscon-sfpb: A phandle to mmss_sfpb syscon node (only for DSIv2) -- ports: Contains 2 DSI controller ports as child nodes. Each port contains - an endpoint subnode as defined in [2] and [3]. - -Optional properties: -- panel@0: Node of panel connected to this DSI controller. - See files in [4] for each supported panel. -- qcom,dual-dsi-mode: Boolean value indicating if the DSI controller is - driving a panel which needs 2 DSI links. -- qcom,master-dsi: Boolean value indicating if the DSI controller is driving - the master link of the 2-DSI panel. -- qcom,sync-dual-dsi: Boolean value indicating if the DSI controller is - driving a 2-DSI panel whose 2 links need receive command simultaneously. -- pinctrl-names: the pin control state names; should contain "default" -- pinctrl-0: the default pinctrl state (active) -- pinctrl-n: the "sleep" pinctrl state -- ports: contains DSI controller input and output ports as children, each - containing one endpoint subnode. - - DSI Endpoint properties: - - remote-endpoint: For port@0, set to phandle of the connected panel/bridge's - input endpoint. For port@1, set to the MDP interface output. See [2] for - device graph info. - - - data-lanes: this describes how the physical DSI data lanes are mapped - to the logical lanes on the given platform. The value contained in - index n describes what physical lane is mapped to the logical lane n - (DATAn, where n lies between 0 and 3). The clock lane position is fixed - and can't be changed. Hence, they aren't a part of the DT bindings. See - [3] for more info on the data-lanes property. - - For example: - - data-lanes = <3 0 1 2>; - - The above mapping describes that the logical data lane DATA0 is mapped to - the physical data lane DATA3, logical DATA1 to physical DATA0, logic DATA2 - to phys DATA1 and logic DATA3 to phys DATA2. - - There are only a limited number of physical to logical mappings possible: - <0 1 2 3> - <1 2 3 0> - <2 3 0 1> - <3 0 1 2> - <0 3 2 1> - <1 0 3 2> - <2 1 0 3> - <3 2 1 0> - -DSI PHY: -Required properties: -- compatible: Could be the following - * "qcom,dsi-phy-28nm-hpm" - * "qcom,dsi-phy-28nm-lp" - * "qcom,dsi-phy-20nm" - * "qcom,dsi-phy-28nm-8960" - * "qcom,dsi-phy-14nm" - * "qcom,dsi-phy-14nm-660" - * "qcom,dsi-phy-10nm" - * "qcom,dsi-phy-10nm-8998" - * "qcom,dsi-phy-7nm" - * "qcom,dsi-phy-7nm-8150" -- reg: Physical base address and length of the registers of PLL, PHY. Some - revisions require the PHY regulator base address, whereas others require the - PHY lane base address. See below for each PHY revision. -- reg-names: The names of register regions. The following regions are required: - For DSI 28nm HPM/LP/8960 PHYs and 20nm PHY: - * "dsi_pll" - * "dsi_phy" - * "dsi_phy_regulator" - For DSI 14nm, 10nm and 7nm PHYs: - * "dsi_pll" - * "dsi_phy" - * "dsi_phy_lane" -- clock-cells: Must be 1. The DSI PHY block acts as a clock provider, creating - 2 clocks: A byte clock (index 0), and a pixel clock (index 1). -- power-domains: Should be <&mmcc MDSS_GDSC>. -- clocks: Phandles to device clocks. See [1] for details on clock bindings. -- clock-names: the following clocks are required: - * "iface" - * "ref" (only required for new DTS files/entries) - For 28nm HPM/LP, 28nm 8960 PHYs: -- vddio-supply: phandle to vdd-io regulator device node - For 20nm PHY: -- vddio-supply: phandle to vdd-io regulator device node -- vcca-supply: phandle to vcca regulator device node - For 14nm PHY: -- vcca-supply: phandle to vcca regulator device node - For 10nm and 7nm PHY: -- vdds-supply: phandle to vdds regulator device node - -Optional properties: -- qcom,dsi-phy-regulator-ldo-mode: Boolean value indicating if the LDO mode PHY - regulator is wanted. -- qcom,mdss-mdp-transfer-time-us: Specifies the dsi transfer time for command mode - panels in microseconds. Driver uses this number to adjust - the clock rate according to the expected transfer time. - Increasing this value would slow down the mdp processing - and can result in slower performance. - Decreasing this value can speed up the mdp processing, - but this can also impact power consumption. - As a rule this time should not be higher than the time - that would be expected with the processing at the - dsi link rate since anyways this would be the maximum - transfer time that could be achieved. - If ping pong split is enabled, this time should not be higher - than two times the dsi link rate time. - If the property is not specified, then the default value is 14000 us. - -[1] Documentation/devicetree/bindings/clock/clock-bindings.txt -[2] Documentation/devicetree/bindings/graph.txt -[3] Documentation/devicetree/bindings/media/video-interfaces.txt -[4] Documentation/devicetree/bindings/display/panel/ - -Example: - dsi0: dsi@fd922800 { - compatible = "qcom,mdss-dsi-ctrl"; - qcom,dsi-host-index = <0>; - interrupt-parent = <&mdp>; - interrupts = <4 0>; - reg-names = "dsi_ctrl"; - reg = <0xfd922800 0x200>; - power-domains = <&mmcc MDSS_GDSC>; - clock-names = - "bus", - "byte", - "core", - "core_mmss", - "iface", - "mdp_core", - "pixel"; - clocks = - <&mmcc MDSS_AXI_CLK>, - <&mmcc MDSS_BYTE0_CLK>, - <&mmcc MDSS_ESC0_CLK>, - <&mmcc MMSS_MISC_AHB_CLK>, - <&mmcc MDSS_AHB_CLK>, - <&mmcc MDSS_MDP_CLK>, - <&mmcc MDSS_PCLK0_CLK>; - - assigned-clocks = - <&mmcc BYTE0_CLK_SRC>, - <&mmcc PCLK0_CLK_SRC>; - assigned-clock-parents = - <&dsi_phy0 0>, - <&dsi_phy0 1>; - - vdda-supply = <&pma8084_l2>; - vdd-supply = <&pma8084_l22>; - vddio-supply = <&pma8084_l12>; - - phys = <&dsi_phy0>; - phy-names ="dsi-phy"; - - qcom,dual-dsi-mode; - qcom,master-dsi; - qcom,sync-dual-dsi; - - qcom,mdss-mdp-transfer-time-us = <12000>; - - pinctrl-names = "default", "sleep"; - pinctrl-0 = <&dsi_active>; - pinctrl-1 = <&dsi_suspend>; - - ports { - #address-cells = <1>; - #size-cells = <0>; - - port@0 { - reg = <0>; - dsi0_in: endpoint { - remote-endpoint = <&mdp_intf1_out>; - }; - }; - - port@1 { - reg = <1>; - dsi0_out: endpoint { - remote-endpoint = <&panel_in>; - data-lanes = <0 1 2 3>; - }; - }; - }; - - panel: panel@0 { - compatible = "sharp,lq101r1sx01"; - reg = <0>; - link2 = <&secondary>; - - power-supply = <...>; - backlight = <...>; - - port { - panel_in: endpoint { - remote-endpoint = <&dsi0_out>; - }; - }; - }; - }; - - dsi_phy0: dsi-phy@fd922a00 { - compatible = "qcom,dsi-phy-28nm-hpm"; - qcom,dsi-phy-index = <0>; - reg-names = - "dsi_pll", - "dsi_phy", - "dsi_phy_regulator"; - reg = <0xfd922a00 0xd4>, - <0xfd922b00 0x2b0>, - <0xfd922d80 0x7b>; - clock-names = "iface"; - clocks = <&mmcc MDSS_AHB_CLK>; - #clock-cells = <1>; - vddio-supply = <&pma8084_l12>; - - qcom,dsi-phy-regulator-ldo-mode; - };
Add YAML schema for the device tree bindings for DSI controller. Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org> Changes in v1: - Separate dsi controller bindings to a separate patch (Stephen Boyd) - Merge dsi-common-controller.yaml and dsi-controller-main.yaml to a single file (Stephen Boyd) - Drop supply entries and definitions from properties (Stephen Boyd) - Modify phy-names property for dsi controller (Stephen Boyd) - Remove boolean from description (Stephen Boyd) - Drop pinctrl properties as they are standard entries (Stephen Boyd) - Modify the description for ports property and keep the reference to the generic binding where this is defined (Stephen Boyd) - Add description to clock names (Stephen Boyd) - Correct the indendation (Stephen Boyd) - Drop the label for display dt nodes and correct the node name (Stephen Boyd) --- .../bindings/display/msm/dsi-controller-main.yaml | 233 +++++++++++++++++++ .../devicetree/bindings/display/msm/dsi.txt | 249 --------------------- 2 files changed, 233 insertions(+), 249 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-controller-main.yaml delete mode 100644 Documentation/devicetree/bindings/display/msm/dsi.txt