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Samsung S5P/EXYNOS SoC Camera Subsystem (FIMC)
----------------------------------------------
The S5P/Exynos SoC Camera subsystem comprises of multiple sub-devices
represented by separate device tree nodes. Currently this includes: FIMC (in
the S5P SoCs series known as CAMIF), MIPI CSIS, FIMC-LITE and FIMC-IS (ISP).
The sub-subdevices are defined as child nodes of the common 'camera' node which
also includes common properties of the whole subsystem not really specific to
any single sub-device, like common camera port pins or the CAMCLK clock outputs
for external image sensors attached to an SoC.
Common 'camera' node
--------------------
Required properties:
- compatible : must be "samsung,fimc", "simple-bus"
- clocks : list of clock specifiers, corresponding to entries in
clock-names property;
- clock-names : must contain "fimc", "sclk_fimc" entries, matching entries
in the clocks property.
The 'camera' node must include at least one 'fimc' child node.
'fimc' device nodes
-------------------
Required properties:
- compatible: "samsung,s5pv210-fimc" for S5PV210, "samsung,exynos4210-fimc"
for Exynos4210 and "samsung,exynos4212-fimc" for Exynos4x12 SoCs;
- reg: physical base address and length of the registers set for the device;
- interrupts: should contain FIMC interrupt;
- clocks: list of clock specifiers, must contain an entry for each required
entry in clock-names;
- clock-names: must include "fimc", "sclk_fimc", "mux" entries and optionally
"parent" entry.
- samsung,pix-limits: an array of maximum supported image sizes in pixels, for
details refer to Table 2-1 in the S5PV210 SoC User Manual; The meaning of
each cell is as follows:
0 - scaler input horizontal size,
1 - input horizontal size for the scaler bypassed,
2 - REAL_WIDTH without input rotation,
3 - REAL_HEIGHT with input rotation,
- samsung,sysreg: a phandle to the SYSREG node.
Each FIMC device should have an alias in the aliases node, in the form of
fimc<n>, where <n> is an integer specifying the IP block instance.
Optional properties:
- clock-frequency: maximum FIMC local clock (LCLK) frequency;
- samsung,min-pix-sizes: an array specyfing minimum image size in pixels at
the FIMC input and output DMA, in the first and second cell respectively.
Default value when this property is not present is <16 16>;
- samsung,min-pix-alignment: minimum supported image height alignment (first
cell) and the horizontal image offset (second cell). The values are in pixels
and default to <2 1> when this property is not present;
- samsung,mainscaler-ext: a boolean property indicating whether the FIMC IP
supports extended image size and has CIEXTEN register;
- samsung,rotators: a bitmask specifying whether this IP has the input and
the output rotator. Bits 4 and 0 correspond to input and output rotator
respectively. If a rotator is present its corresponding bit should be set.
Default value when this property is not specified is 0x11.
- samsung,cam-if: a bolean property indicating whether the IP block includes
the camera input interface.
- samsung,isp-wb: this property must be present if the IP block has the ISP
writeback input.
- samsung,lcd-wb: this property must be present if the IP block has the LCD
writeback input.
Example:
aliases {
fimc0 = &fimc_0;
};
camera {
compatible = "samsung,fimc", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
status = "okay";
fimc_0: fimc@11800000 {
compatible = "samsung,exynos4210-fimc";
reg = <0x11800000 0x1000>;
interrupts = <0 85 0>;
status = "okay";
};
csis_0: csis@11880000 {
compatible = "samsung,exynos4210-csis";
reg = <0x11880000 0x1000>;
interrupts = <0 78 0>;
};
};
The MIPI-CSIS device binding is defined in samsung-mipi-csis.txt.
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