DSI
介绍DSI的功能和使用方法。
提供 1 个 MIPI DSI 接口，支持 4 lane, 速率 1.2Gbps/lane, 支持最高 1920x1440@60FPS。
dts 配置
MIPI DSI 相关配置内容在 k1-x-lcd.dtsi，包括 irq, clock 及 power domain 相关配置。
display-subsystem-dsi {
compatible = "spacemit,saturn-le";
reg = <0 0xC0340000 0 0x2A000>;
ports = <&dpu_online2_dsi>;
};
dpu_online2_dsi: port@c0340000 {
compatible = "spacemit,dpu-online2";
interrupt-parent = <&intc>;
interrupts = <90>, <89>;
interrupt-names = "ONLINE_IRQ", "OFFLINE_IRQ";
clocks = <&ccu CLK_DPU_PXCLK>,
<&ccu CLK_DPU_MCLK>,
<&ccu CLK_DPU_HCLK>,
<&ccu CLK_DPU_ESC>,
<&ccu CLK_DPU_BIT>;
clock-names = "pxclk", "mclk", "hclk", "escclk", "bitclk";
assigned-clocks = <&ccu CLK_DPU_PXCLK>,
<&ccu CLK_DPU_MCLK>,
<&ccu CLK_DPU_HCLK>,
<&ccu CLK_DPU_ESC>,
<&ccu CLK_DPU_BIT>;
assigned-clock-parents = <&ccu CLK_PLL1_614>,
<&ccu CLK_PLL1_307P2>,
<0>,
<&ccu CLK_PLL1_51P2_AP>,
<&ccu CLK_PLL1_1228>;
resets = <&reset RESET_MIPI>,
<&reset RESET_LCD_MCLK>,
<&reset RESET_LCD>,
<&reset RESET_DSI_ESC>;
reset-names= "dsi_reset", "mclk_reset", "lcd_reset","esc_reset";
power-domains = <&power K1X_PMU_LCD_PWR_DOMAIN>;
pipeline-id = <ONLINE2>;
ip = "spacemit-saturn";
spacemit-dpu-min-mclk = <40960000>;
status = "disabled";
dpu_online2_dsi_out: endpoint@0 {
remote-endpoint = <&dsi2_in>;
};
};
dsi2: dsi2@d421a800 {
compatible = "spacemit,dsi2-host";
#address-cells = <1>;
#size-cells = <0>;
reg = <0 0xD421A800 0 0x200>;
interrupt-parent = <&intc>;
interrupts = <95>;
ip = "synopsys-dhost";
dev-id = <2>;
status = "disabled";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
dsi2_out: endpoint {
remote-endpoint = <&dphy2_in>;
};
};
port@1 {
reg = <1>;
dsi2_in: endpoint {
remote-endpoint = <&dpu_online2_dsi_out>;
};
};
};
};
dphy2: dphy2@d421a800 {
compatible = "spacemit,dsi2-phy";
#address-cells = <1>;
#size-cells = <0>;
reg = <0 0xD421A800 0 0x200>;
ip = "spacemit-dphy";
dev-id = <2>;
status = "okay";
port@1 {
reg = <1>;
dphy2_in: endpoint {
remote-endpoint = <&dsi2_out>;
};
};
};
默认关闭 MIPI DSI 功能，在方案配置文件中选择 panel，及是否打开
&dpu_online2_dsi {
memory-region = <&dpu_resv>;
spacemit-dpu-bitclk = <1000000000>;
dsi_1v2-supply = <&ldo_5>;
vin-supply-names = "dsi_1v2";
status = "okay";
};
&dsi2 {
status = "okay";
panel2: panel2@0 {
status = "ok";
compatible = "spacemit,mipi-panel2";
reg = <0>;
gpios-reset = <81>; // reset pin 脚
gpios-dc = <82 83>; // power pin脚
id = <2>;
delay-after-reset = <10>; // reset 延时 单位ms
force-attached = "lcd_gx09inx101_mipi"; // 选择panel
};
};
&lcds {
status = "okay";
};
panel 列表
已完成功能调试的 panel，相关 dtsi 文件放置在 lcd 目录，主要参数包括：MIPI DSI 工作模式，panel 的初始化序列，及 timing。
例如 panel lcd_gx09inx101_mipi 配置内容如下：
/ { lcds: lcds {
lcd_gx09inx101_mipi: lcd_gx09inx101_mipi {
dsi-work-mode = <1>; /* video burst mode*/
dsi-lane-number = <4>;
dsi-color-format = "rgb888";
phy-bit-clock = <911000>; /* kbps */
phy-escape-clock = <52000>;/* kHz */
width-mm = <142>;
height-mm = <228>;
use-dcs-write;
/*mipi info*/
height = <1920>;
width = <1200>;
hfp = <80>;
hbp = <40>;
hsync = <10>;
vfp = <20>;
vbp = <16>;
vsync = <4>;
fps = <60>;
work-mode = <0>;
rgb-mode = <3>;
lane-number = <4>;
phy-freq = <624000>;
split-enable = <0>;
eotp-enable = <0>;
burst-mode = <2>;
esd-check-enable = <0>;
/* DSI_CMD, DSI_MODE, timeout, len, cmd */
initial-command = [
39 01 00 02 B0 01
39 01 00 02 C3 4F
39 01 00 02 C4 40
39 01 00 02 C5 40
39 01 00 02 C6 40
39 01 00 02 C7 40
39 01 00 02 C8 4D
39 01 00 02 C9 52
39 01 00 02 CA 51
39 01 00 02 CD 5D
39 01 00 02 CE 5B
39 01 00 02 CF 4B
39 01 00 02 D0 49
39 01 00 02 D1 47
39 01 00 02 D2 45
39 01 00 02 D3 41
39 01 00 02 D7 50
39 01 00 02 D8 40
39 01 00 02 D9 40
39 01 00 02 DA 40
39 01 00 02 DB 40
39 01 00 02 DC 4E
39 01 00 02 DD 52
39 01 00 02 DE 51
39 01 00 02 E1 5E
39 01 00 02 E2 5C
39 01 00 02 E3 4C
39 01 00 02 E4 4A
39 01 00 02 E5 48
39 01 00 02 E6 46
39 01 00 02 E7 42
39 01 00 02 B0 03
39 01 00 02 BE 03
39 01 00 02 CC 44
39 01 00 02 C8 07
39 01 00 02 C9 05
39 01 00 02 CA 42
39 01 00 02 CD 3E
39 01 00 02 CF 60
39 01 00 02 D2 04
39 01 00 02 D3 04
39 01 00 02 D4 01
39 01 00 02 D5 00
39 01 00 02 D6 03
39 01 00 02 D7 04
39 01 00 02 D9 01
39 01 00 02 DB 01
39 01 00 02 E4 F0
39 01 00 02 E5 0A
39 01 00 02 B0 00
39 01 00 02 BD 50
39 01 00 02 C2 08
39 01 00 02 C4 10
39 01 00 02 CC 00
39 01 00 02 B0 02
39 01 00 02 C0 00
39 01 00 02 C1 0A
39 01 00 02 C2 20
39 01 00 02 C3 24
39 01 00 02 C4 23
39 01 00 02 C5 29
39 01 00 02 C6 23
39 01 00 02 C7 1C
39 01 00 02 C8 19
39 01 00 02 C9 17
39 01 00 02 CA 17
39 01 00 02 CB 18
39 01 00 02 CC 1A
39 01 00 02 CD 1E
39 01 00 02 CE 20
39 01 00 02 CF 23
39 01 00 02 D0 07
39 01 00 02 D1 00
39 01 00 02 D2 00
39 01 00 02 D3 0A
39 01 00 02 D4 13
39 01 00 02 D5 1C
39 01 00 02 D6 1A
39 01 00 02 D7 13
39 01 00 02 D8 17
39 01 00 02 D9 1C
39 01 00 02 DA 19
39 01 00 02 DB 17
39 01 00 02 DC 17
39 01 00 02 DD 18
39 01 00 02 DE 1A
39 01 00 02 DF 1E
39 01 00 02 E0 20
39 01 00 02 E1 23
39 01 00 02 E2 07
39 01 F0 01 11
39 01 28 01 29
];
sleep-in-command = [
39 01 78 01 28
39 01 78 01 10
];
sleep-out-command = [
39 01 96 01 11
39 01 32 01 29
];
read-id-command = [
37 01 00 01 05
14 01 00 05 fb fc fd fe ff
];
display-timings {
timing0 {
clock-frequency = <156400000>;
hactive = <1200>;
hfront-porch = <80>;
hback-porch = <40>;
hsync-len = <10>;
vactive = <1920>;
vfront-porch = <20>;
vback-porch = <16>;
vsync-len = <4>;
vsync-active = <1>;
hsync-active = <1>;
};
};
};
};};