Documentation/devicetree/bindings/media/rcar_vin.txt

   1 Renesas R-Car Video Input driver (rcar_vin)
   2 -------------------------------------------
   3
   4 The rcar_vin device provides video input capabilities for the Renesas R-Car
   5 family of devices.
   6
   7 Each VIN instance has a single parallel input that supports RGB and YUV video,
   8 with both external synchronization and BT.656 synchronization for the latter.
   9 Depending on the instance the VIN input is connected to external SoC pins, or
  10 on Gen3 platforms to a CSI-2 receiver.
  11
  12  - compatible: Must be one or more of the following
  13    - "renesas,vin-r8a7743" for the R8A7743 device
  14    - "renesas,vin-r8a7744" for the R8A7744 device
  15    - "renesas,vin-r8a7745" for the R8A7745 device
  16    - "renesas,vin-r8a7778" for the R8A7778 device
  17    - "renesas,vin-r8a7779" for the R8A7779 device
  18    - "renesas,vin-r8a7790" for the R8A7790 device
  19    - "renesas,vin-r8a7791" for the R8A7791 device
  20    - "renesas,vin-r8a7792" for the R8A7792 device
  21    - "renesas,vin-r8a7793" for the R8A7793 device
  22    - "renesas,vin-r8a7794" for the R8A7794 device
  23    - "renesas,vin-r8a7795" for the R8A7795 device
  24    - "renesas,vin-r8a7796" for the R8A7796 device
  25    - "renesas,vin-r8a77965" for the R8A77965 device
  26    - "renesas,vin-r8a77970" for the R8A77970 device
  27    - "renesas,vin-r8a77995" for the R8A77995 device
  28    - "renesas,rcar-gen2-vin" for a generic R-Car Gen2 or RZ/G1 compatible
  29      device.
  30
  31    When compatible with the generic version nodes must list the
  32    SoC-specific version corresponding to the platform first
  33    followed by the generic version.
  34
  35  - reg: the register base and size for the device registers
  36  - interrupts: the interrupt for the device
  37  - clocks: Reference to the parent clock
  38
  39 Additionally, an alias named vinX will need to be created to specify
  40 which video input device this is.
  41
  42 The per-board settings Gen2 platforms:
  43
  44 - port - sub-node describing a single endpoint connected to the VIN
  45   from external SoC pins as described in video-interfaces.txt[1].
  46   Only the first one will be considered as each vin interface has one
  47   input port.
  48
  49   - Optional properties for endpoint nodes:
  50     - hsync-active: see [1] for description. Default is active high.
  51     - vsync-active: see [1] for description. Default is active high.
  52       If both HSYNC and VSYNC polarities are not specified, embedded
  53       synchronization is selected.
  54     - field-active-even: see [1] for description. Default is active high.
  55     - bus-width: see [1] for description. The selected bus width depends on
  56       the SoC type and selected input image format.
  57       Valid values are: 8, 10, 12, 16, 24 and 32.
  58     - data-shift: see [1] for description. Valid values are 0 and 8.
  59     - data-enable-active: polarity of CLKENB signal, see [1] for
  60       description. Default is active high.
  61
  62 The per-board settings Gen3 platforms:
  63
  64 Gen3 platforms can support both a single connected parallel input source
  65 from external SoC pins (port@0) and/or multiple parallel input sources
  66 from local SoC CSI-2 receivers (port@1) depending on SoC.
  67
  68 - renesas,id - ID number of the VIN, VINx in the documentation.
  69 - ports
  70     - port@0 - sub-node describing a single endpoint connected to the VIN
  71       from external SoC pins as described in video-interfaces.txt[1].
  72       Describing more than one endpoint in port@0 is invalid. Only VIN
  73       instances that are connected to external pins should have port@0.
  74
  75       Endpoint nodes of port@0 support the optional properties listed in
  76       the Gen2 per-board settings description.
  77
  78     - port@1 - sub-nodes describing one or more endpoints connected to
  79       the VIN from local SoC CSI-2 receivers. The endpoint numbers must
  80       use the following schema.
  81
  82         - endpoint@0 - sub-node describing the endpoint connected to CSI20
  83         - endpoint@1 - sub-node describing the endpoint connected to CSI21
  84         - endpoint@2 - sub-node describing the endpoint connected to CSI40
  85         - endpoint@3 - sub-node describing the endpoint connected to CSI41
  86
  87       Endpoint nodes of port@1 do not support any optional endpoint property.
  88
  89 Device node example for Gen2 platforms
  90 --------------------------------------
  91
  92         aliases {
  93                 vin0 = &vin0;
  94         };
  95
  96         vin0: vin@e6ef0000 {
  97                 compatible = "renesas,vin-r8a7790", "renesas,rcar-gen2-vin";
  98                 clocks = <&mstp8_clks R8A7790_CLK_VIN0>;
  99                 reg = <0 0xe6ef0000 0 0x1000>;
 100                 interrupts = <0 188 IRQ_TYPE_LEVEL_HIGH>;
 101                 status = "disabled";
 102         };
 103
 104 Board setup example for Gen2 platforms (vin1 composite video input)
 105 -------------------------------------------------------------------
 106
 107 &i2c2   {
 108         status = "okay";
 109         pinctrl-0 = <&i2c2_pins>;
 110         pinctrl-names = "default";
 111
 112         adv7180@20 {
 113                 compatible = "adi,adv7180";
 114                 reg = <0x20>;
 115                 remote = <&vin1>;
 116
 117                 port {
 118                         adv7180: endpoint {
 119                                 bus-width = <8>;
 120                                 remote-endpoint = <&vin1ep0>;
 121                         };
 122                 };
 123         };
 124 };
 125
 126 /* composite video input */
 127 &vin1 {
 128         pinctrl-0 = <&vin1_pins>;
 129         pinctrl-names = "default";
 130
 131         status = "okay";
 132
 133         port {
 134                 vin1ep0: endpoint {
 135                         remote-endpoint = <&adv7180>;
 136                         bus-width = <8>;
 137                 };
 138         };
 139 };
 140
 141 Device node example for Gen3 platforms
 142 --------------------------------------
 143
 144         vin0: video@e6ef0000 {
 145                 compatible = "renesas,vin-r8a7795";
 146                 reg = <0 0xe6ef0000 0 0x1000>;
 147                 interrupts = <GIC_SPI 188 IRQ_TYPE_LEVEL_HIGH>;
 148                 clocks = <&cpg CPG_MOD 811>;
 149                 power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 150                 resets = <&cpg 811>;
 151                 renesas,id = <0>;
 152
 153                 ports {
 154                         #address-cells = <1>;
 155                         #size-cells = <0>;
 156
 157                         port@1 {
 158                                 #address-cells = <1>;
 159                                 #size-cells = <0>;
 160
 161                                 reg = <1>;
 162
 163                                 vin0csi20: endpoint@0 {
 164                                         reg = <0>;
 165                                         remote-endpoint= <&csi20vin0>;
 166                                 };
 167                                 vin0csi21: endpoint@1 {
 168                                         reg = <1>;
 169                                         remote-endpoint= <&csi21vin0>;
 170                                 };
 171                                 vin0csi40: endpoint@2 {
 172                                         reg = <2>;
 173                                         remote-endpoint= <&csi40vin0>;
 174                                 };
 175                         };
 176                 };
 177         };
 178
 179         csi20: csi2@fea80000 {
 180                 compatible = "renesas,r8a7795-csi2";
 181                 reg = <0 0xfea80000 0 0x10000>;
 182                 interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
 183                 clocks = <&cpg CPG_MOD 714>;
 184                 power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 185                 resets = <&cpg 714>;
 186
 187                 ports {
 188                         #address-cells = <1>;
 189                         #size-cells = <0>;
 190
 191                         port@0 {
 192                                 reg = <0>;
 193                                 csi20_in: endpoint {
 194                                         clock-lanes = <0>;
 195                                         data-lanes = <1>;
 196                                         remote-endpoint = <&adv7482_txb>;
 197                                 };
 198                         };
 199
 200                         port@1 {
 201                                 #address-cells = <1>;
 202                                 #size-cells = <0>;
 203
 204                                 reg = <1>;
 205
 206                                 csi20vin0: endpoint@0 {
 207                                         reg = <0>;
 208                                         remote-endpoint = <&vin0csi20>;
 209                                 };
 210                         };
 211                 };
 212         };
 213
 214 [1] video-interfaces.txt common video media interface