From 77bbd8914a91fab25f567772db60e2d1372de8c6 Mon Sep 17 00:00:00 2001 From: Hyungwon Hwang Date: Fri, 12 Jun 2015 21:59:02 +0900 Subject: drm/exynos: mic: add MIC driver MIC(Mobile image compressor) is newly added IP in Exynos5433. MIC resides between decon and mipi dsim, and compresses frame data by 50%. With dsi, not display port, to send frame data to the panel, the bandwidth is not enough. That is why this compressor is introduced. Signed-off-by: Hyungwon Hwang Signed-off-by: Inki Dae --- .../devicetree/bindings/video/exynos-mic.txt | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/video/exynos-mic.txt (limited to 'Documentation/devicetree/bindings/video') diff --git a/Documentation/devicetree/bindings/video/exynos-mic.txt b/Documentation/devicetree/bindings/video/exynos-mic.txt new file mode 100644 index 000000000000..0fba2ee6440a --- /dev/null +++ b/Documentation/devicetree/bindings/video/exynos-mic.txt @@ -0,0 +1,51 @@ +Device-Tree bindings for Samsung Exynos SoC mobile image compressor (MIC) + +MIC (mobile image compressor) resides between decon and mipi dsi. Mipi dsi is +not capable to transfer high resoltuion frame data as decon can send. MIC +solves this problem by compressing the frame data by 1/2 before it is +transferred through mipi dsi. The compressed frame data must be uncompressed in +the panel PCB. + +Required properties: +- compatible: value should be "samsung,exynos5433-mic". +- reg: physical base address and length of the MIC registers set and system + register of mic. +- 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_mic0", "sclk_rgb_vclk_to_mic0". +- samsung,disp-syscon: the reference node for syscon for DISP block. +- ports: contains a port which is connected to decon node and dsi node. + address-cells and size-cells must 1 and 0, respectively. +- port: contains an endpoint node which is connected to the endpoint in the + decon node or dsi node. The reg value must be 0 and 1 respectively. + +Example: +SoC specific DT entry: +mic: mic@13930000 { + compatible = "samsung,exynos5433-mic"; + reg = <0x13930000 0x48>; + clocks = <&cmu_disp CLK_PCLK_MIC0>, + <&cmu_disp CLK_SCLK_RGB_VCLK_TO_MIC0>; + clock-names = "pclk_mic0", "sclk_rgb_vclk_to_mic0"; + samsung,disp-syscon = <&syscon_disp>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + mic_to_decon: endpoint { + remote-endpoint = <&decon_to_mic>; + }; + }; + + port@1 { + reg = <1>; + mic_to_dsi: endpoint { + remote-endpoint = <&dsi_to_mic>; + }; + }; + }; +}; -- cgit v1.2.3