1Samsung S5P/Exynos SoC Camera Subsystem (FIMC) 2---------------------------------------------- 3 4The S5P/Exynos SoC Camera subsystem comprises of multiple sub-devices 5represented by separate device tree nodes. Currently this includes: FIMC (in 6the S5P SoCs series known as CAMIF), MIPI CSIS, FIMC-LITE and FIMC-IS (ISP). 7 8The sub-subdevices are defined as child nodes of the common 'camera' node which 9also includes common properties of the whole subsystem not really specific to 10any single sub-device, like common camera port pins or the CAMCLK clock outputs 11for external image sensors attached to an SoC. 12 13Common 'camera' node 14-------------------- 15 16Required properties: 17 18- compatible: must be "samsung,fimc", "simple-bus" 19- clocks: list of clock specifiers, corresponding to entries in 20 the clock-names property; 21- clock-names : must contain "sclk_cam0", "sclk_cam1", "pxl_async0", 22 "pxl_async1" entries, matching entries in the clocks property. 23 24- #clock-cells: from the common clock bindings (../clock/clock-bindings.txt), 25 must be 1. A clock provider is associated with the 'camera' node and it should 26 be referenced by external sensors that use clocks provided by the SoC on 27 CAM_*_CLKOUT pins. The clock specifier cell stores an index of a clock. 28 The indices are 0, 1 for CAM_A_CLKOUT, CAM_B_CLKOUT clocks respectively. 29 30- clock-output-names: from the common clock bindings, should contain names of 31 clocks registered by the camera subsystem corresponding to CAM_A_CLKOUT, 32 CAM_B_CLKOUT output clocks respectively. 33 34The pinctrl bindings defined in ../pinctrl/pinctrl-bindings.txt must be used 35to define a required pinctrl state named "default" and optional pinctrl states: 36"idle", "active-a", active-b". These optional states can be used to switch the 37camera port pinmux at runtime. The "idle" state should configure both the camera 38ports A and B into high impedance state, especially the CAMCLK clock output 39should be inactive. For the "active-a" state the camera port A must be activated 40and the port B deactivated and for the state "active-b" it should be the other 41way around. 42 43The 'camera' node must include at least one 'fimc' child node. 44 45 46'fimc' device nodes 47------------------- 48 49Required properties: 50 51- compatible: "samsung,s5pv210-fimc" for S5PV210, "samsung,exynos4210-fimc" 52 for Exynos4210 and "samsung,exynos4212-fimc" for Exynos4x12 SoCs; 53- reg: physical base address and length of the registers set for the device; 54- interrupts: should contain FIMC interrupt; 55- clocks: list of clock specifiers, must contain an entry for each required 56 entry in clock-names; 57- clock-names: must contain "fimc", "sclk_fimc" entries. 58- samsung,pix-limits: an array of maximum supported image sizes in pixels, for 59 details refer to Table 2-1 in the S5PV210 SoC User Manual; The meaning of 60 each cell is as follows: 61 0 - scaler input horizontal size, 62 1 - input horizontal size for the scaler bypassed, 63 2 - REAL_WIDTH without input rotation, 64 3 - REAL_HEIGHT with input rotation, 65- samsung,sysreg: a phandle to the SYSREG node. 66 67Each FIMC device should have an alias in the aliases node, in the form of 68fimc<n>, where <n> is an integer specifying the IP block instance. 69 70Optional properties: 71 72- clock-frequency: maximum FIMC local clock (LCLK) frequency; 73- samsung,min-pix-sizes: an array specyfing minimum image size in pixels at 74 the FIMC input and output DMA, in the first and second cell respectively. 75 Default value when this property is not present is <16 16>; 76- samsung,min-pix-alignment: minimum supported image height alignment (first 77 cell) and the horizontal image offset (second cell). The values are in pixels 78 and default to <2 1> when this property is not present; 79- samsung,mainscaler-ext: a boolean property indicating whether the FIMC IP 80 supports extended image size and has CIEXTEN register; 81- samsung,rotators: a bitmask specifying whether this IP has the input and 82 the output rotator. Bits 4 and 0 correspond to input and output rotator 83 respectively. If a rotator is present its corresponding bit should be set. 84 Default value when this property is not specified is 0x11. 85- samsung,cam-if: a bolean property indicating whether the IP block includes 86 the camera input interface. 87- samsung,isp-wb: this property must be present if the IP block has the ISP 88 writeback input. 89- samsung,lcd-wb: this property must be present if the IP block has the LCD 90 writeback input. 91 92 93'parallel-ports' node 94--------------------- 95 96This node should contain child 'port' nodes specifying active parallel video 97input ports. It includes camera A and camera B inputs. 'reg' property in the 98port nodes specifies data input - 0, 1 indicates input A, B respectively. 99 100Optional properties 101 102- samsung,camclk-out (deprecated) : specifies clock output for remote sensor, 103 0 - CAM_A_CLKOUT, 1 - CAM_B_CLKOUT; 104 105Image sensor nodes 106------------------ 107 108The sensor device nodes should be added to their control bus controller (e.g. 109I2C0) nodes and linked to a port node in the csis or the parallel-ports node, 110using the common video interfaces bindings, defined in video-interfaces.txt. 111 112Example: 113 114 aliases { 115 fimc0 = &fimc_0; 116 }; 117 118 /* Parallel bus IF sensor */ 119 i2c_0: i2c@13860000 { 120 s5k6aa: sensor@3c { 121 compatible = "samsung,s5k6aafx"; 122 reg = <0x3c>; 123 vddio-supply = <...>; 124 125 clock-frequency = <24000000>; 126 clocks = <&camera 1>; 127 clock-names = "mclk"; 128 129 port { 130 s5k6aa_ep: endpoint { 131 remote-endpoint = <&fimc0_ep>; 132 bus-width = <8>; 133 hsync-active = <0>; 134 vsync-active = <1>; 135 pclk-sample = <1>; 136 }; 137 }; 138 }; 139 140 /* MIPI CSI-2 bus IF sensor */ 141 s5c73m3: sensor@1a { 142 compatible = "samsung,s5c73m3"; 143 reg = <0x1a>; 144 vddio-supply = <...>; 145 146 clock-frequency = <24000000>; 147 clocks = <&camera 0>; 148 clock-names = "mclk"; 149 150 port { 151 s5c73m3_1: endpoint { 152 data-lanes = <1 2 3 4>; 153 remote-endpoint = <&csis0_ep>; 154 }; 155 }; 156 }; 157 }; 158 159 camera { 160 compatible = "samsung,fimc", "simple-bus"; 161 clocks = <&clock 132>, <&clock 133>, <&clock 351>, 162 <&clock 352>; 163 clock-names = "sclk_cam0", "sclk_cam1", "pxl_async0", 164 "pxl_async1"; 165 #clock-cells = <1>; 166 clock-output-names = "cam_a_clkout", "cam_b_clkout"; 167 pinctrl-names = "default"; 168 pinctrl-0 = <&cam_port_a_clk_active>; 169 #address-cells = <1>; 170 #size-cells = <1>; 171 172 /* parallel camera ports */ 173 parallel-ports { 174 /* camera A input */ 175 port@0 { 176 reg = <0>; 177 fimc0_ep: endpoint { 178 remote-endpoint = <&s5k6aa_ep>; 179 bus-width = <8>; 180 hsync-active = <0>; 181 vsync-active = <1>; 182 pclk-sample = <1>; 183 }; 184 }; 185 }; 186 187 fimc_0: fimc@11800000 { 188 compatible = "samsung,exynos4210-fimc"; 189 reg = <0x11800000 0x1000>; 190 interrupts = <0 85 0>; 191 }; 192 193 csis_0: csis@11880000 { 194 compatible = "samsung,exynos4210-csis"; 195 reg = <0x11880000 0x1000>; 196 interrupts = <0 78 0>; 197 /* camera C input */ 198 port@3 { 199 reg = <3>; 200 csis0_ep: endpoint { 201 remote-endpoint = <&s5c73m3_ep>; 202 data-lanes = <1 2 3 4>; 203 samsung,csis-hs-settle = <12>; 204 }; 205 }; 206 }; 207 }; 208 209The MIPI-CSIS device binding is defined in samsung-mipi-csis.txt. 210