diff options
author | Ajay Kumar <ajaykumar.rs@samsung.com> | 2015-02-05 21:24:04 +0530 |
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committer | Inki Dae <inki.dae@samsung.com> | 2015-02-11 20:27:08 +0900 |
commit | 96976c3d9aff4e1387c30f6356ac01fa6f72ef46 (patch) | |
tree | f0af6014cf2a72153307e611c94610d35875805e /Documentation/devicetree/bindings/video | |
parent | 936ce5cce66ce6f9b5138a1ac0fbf0c2d459a960 (diff) |
drm/exynos: Add DECON driver
This patch is based on exynos-drm-next branch of Inki Dae's tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git
DECON(Display and Enhancement Controller) is the new IP
in exynos7 SOC for generating video signals using pixel data.
DECON driver can be used to drive 2 different interfaces on Exynos7:
DECON-INT(video controller) and DECON-EXT(Mixer for HDMI)
The existing FIMD driver code was used as a template to create
DECON driver. Only DECON-INT is supported as of now, and
DECON-EXT support will be added later.
The current version of the driver supports video mode displays.
Changelog v2:
- Change config name, DRM_EXYNOS_DECON to DRM_EXYNOS7_DECON.
Signed-off-by: Akshu Agrawal <akshua@gmail.com>
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'Documentation/devicetree/bindings/video')
-rw-r--r-- | Documentation/devicetree/bindings/video/exynos7-decon.txt | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/video/exynos7-decon.txt b/Documentation/devicetree/bindings/video/exynos7-decon.txt new file mode 100644 index 000000000000..f5f9c8d4a55a --- /dev/null +++ b/Documentation/devicetree/bindings/video/exynos7-decon.txt @@ -0,0 +1,68 @@ +Device-Tree bindings for Samsung Exynos7 SoC display controller (DECON) + +DECON (Display and Enhancement Controller) is the Display Controller for the +Exynos7 series of SoCs which transfers the image data from a video memory +buffer to an external LCD interface. + +Required properties: +- compatible: value should be "samsung,exynos7-decon"; + +- reg: physical base address and length of the DECON registers set. + +- interrupt-parent: should be the phandle of the decon controller's + parent interrupt controller. + +- interrupts: should contain a list of all DECON IP block interrupts in the + order: FIFO Level, VSYNC, LCD_SYSTEM. The interrupt specifier + format depends on the interrupt controller used. + +- interrupt-names: should contain the interrupt names: "fifo", "vsync", + "lcd_sys", in the same order as they were listed in the interrupts + property. + +- pinctrl-0: pin control group to be used for this controller. + +- pinctrl-names: must contain a "default" entry. + +- clocks: must include clock specifiers corresponding to entries in the + clock-names property. + +- clock-names: list of clock names sorted in the same order as the clocks + property. Must contain "pclk_decon0", "aclk_decon0", + "decon0_eclk", "decon0_vclk". +- i80-if-timings: timing configuration for lcd i80 interface support. + +Optional Properties: +- samsung,power-domain: a phandle to DECON power domain node. +- display-timings: timing settings for DECON, as described in document [1]. + Can be used in case timings cannot be provided otherwise + or to override timings provided by the panel. + +[1]: Documentation/devicetree/bindings/video/display-timing.txt + +Example: + +SoC specific DT entry: + + decon@13930000 { + compatible = "samsung,exynos7-decon"; + interrupt-parent = <&combiner>; + reg = <0x13930000 0x1000>; + interrupt-names = "lcd_sys", "vsync", "fifo"; + interrupts = <0 188 0>, <0 189 0>, <0 190 0>; + clocks = <&clock_disp PCLK_DECON_INT>, + <&clock_disp ACLK_DECON_INT>, + <&clock_disp SCLK_DECON_INT_ECLK>, + <&clock_disp SCLK_DECON_INT_EXTCLKPLL>; + clock-names = "pclk_decon0", "aclk_decon0", "decon0_eclk", + "decon0_vclk"; + status = "disabled"; + }; + +Board specific DT entry: + + decon@13930000 { + pinctrl-0 = <&lcd_clk &pwm1_out>; + pinctrl-names = "default"; + status = "okay"; + }; |