142 lines
3.7 KiB
Plaintext
142 lines
3.7 KiB
Plaintext
* STMicroelectronics STM32 lcd-tft display controller
|
|
|
|
- ltdc: lcd-tft display controller host
|
|
Required properties:
|
|
- compatible: "st,stm32-ltdc"
|
|
- reg: Physical base address of the IP registers and length of memory mapped region.
|
|
- clocks: A list of phandle + clock-specifier pairs, one for each
|
|
entry in 'clock-names'.
|
|
- clock-names: A list of clock names. For ltdc it should contain:
|
|
- "lcd" for the clock feeding the output pixel clock & IP clock.
|
|
- resets: reset to be used by the device (defined by use of RCC macro).
|
|
Required nodes:
|
|
- Video port for DPI RGB output: ltdc has one video port with up to 2
|
|
endpoints:
|
|
- for external dpi rgb panel or bridge, using gpios.
|
|
- for internal dpi input of the MIPI DSI host controller.
|
|
Note: These 2 endpoints cannot be activated simultaneously.
|
|
|
|
* STMicroelectronics STM32 DSI controller specific extensions to Synopsys
|
|
DesignWare MIPI DSI host controller
|
|
|
|
The STMicroelectronics STM32 DSI controller uses the Synopsys DesignWare MIPI
|
|
DSI host controller. For all mandatory properties & nodes, please refer
|
|
to the related documentation in [5].
|
|
|
|
Mandatory properties specific to STM32 DSI:
|
|
- #address-cells: Should be <1>.
|
|
- #size-cells: Should be <0>.
|
|
- compatible: "st,stm32-dsi".
|
|
- clock-names:
|
|
- phy pll reference clock string name, must be "ref".
|
|
- resets: see [5].
|
|
- reset-names: see [5].
|
|
|
|
Mandatory nodes specific to STM32 DSI:
|
|
- ports: A node containing DSI input & output port nodes with endpoint
|
|
definitions as documented in [3] & [4].
|
|
- port@0: DSI input port node, connected to the ltdc rgb output port.
|
|
- port@1: DSI output port node, connected to a panel or a bridge input port.
|
|
- panel or bridge node: A node containing the panel or bridge description as
|
|
documented in [6].
|
|
- port: panel or bridge port node, connected to the DSI output port (port@1).
|
|
|
|
Note: You can find more documentation in the following references
|
|
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
|
|
[2] Documentation/devicetree/bindings/reset/reset.txt
|
|
[3] Documentation/devicetree/bindings/media/video-interfaces.txt
|
|
[4] Documentation/devicetree/bindings/graph.txt
|
|
[5] Documentation/devicetree/bindings/display/bridge/dw_mipi_dsi.txt
|
|
[6] Documentation/devicetree/bindings/display/mipi-dsi-bus.txt
|
|
|
|
Example 1: RGB panel
|
|
/ {
|
|
...
|
|
soc {
|
|
...
|
|
ltdc: display-controller@40016800 {
|
|
compatible = "st,stm32-ltdc";
|
|
reg = <0x40016800 0x200>;
|
|
interrupts = <88>, <89>;
|
|
resets = <&rcc STM32F4_APB2_RESET(LTDC)>;
|
|
clocks = <&rcc 1 CLK_LCD>;
|
|
clock-names = "lcd";
|
|
|
|
port {
|
|
ltdc_out_rgb: endpoint {
|
|
};
|
|
};
|
|
};
|
|
};
|
|
};
|
|
|
|
Example 2: DSI panel
|
|
|
|
/ {
|
|
...
|
|
soc {
|
|
...
|
|
ltdc: display-controller@40016800 {
|
|
compatible = "st,stm32-ltdc";
|
|
reg = <0x40016800 0x200>;
|
|
interrupts = <88>, <89>;
|
|
resets = <&rcc STM32F4_APB2_RESET(LTDC)>;
|
|
clocks = <&rcc 1 CLK_LCD>;
|
|
clock-names = "lcd";
|
|
|
|
port {
|
|
ltdc_out_dsi: endpoint {
|
|
remote-endpoint = <&dsi_in>;
|
|
};
|
|
};
|
|
};
|
|
|
|
|
|
dsi: dsi@40016c00 {
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
compatible = "st,stm32-dsi";
|
|
reg = <0x40016c00 0x800>;
|
|
clocks = <&rcc 1 CLK_F469_DSI>, <&clk_hse>;
|
|
clock-names = "pclk", "ref";
|
|
resets = <&rcc STM32F4_APB2_RESET(DSI)>;
|
|
reset-names = "apb";
|
|
|
|
ports {
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
|
|
port@0 {
|
|
reg = <0>;
|
|
dsi_in: endpoint {
|
|
remote-endpoint = <<dc_out_dsi>;
|
|
};
|
|
};
|
|
|
|
port@1 {
|
|
reg = <1>;
|
|
dsi_out: endpoint {
|
|
remote-endpoint = <&dsi_in_panel>;
|
|
};
|
|
};
|
|
|
|
};
|
|
|
|
panel-dsi@0 {
|
|
reg = <0>; /* dsi virtual channel (0..3) */
|
|
compatible = ...;
|
|
enable-gpios = ...;
|
|
|
|
port {
|
|
dsi_in_panel: endpoint {
|
|
remote-endpoint = <&dsi_out>;
|
|
};
|
|
};
|
|
|
|
};
|
|
|
|
};
|
|
|
|
};
|
|
};
|