Hi,
I enabled with success the MIPI DSI interface for ILI9881C display driver. The interface work with 2 lanes and clock. After boot, the kernel initialize drm and dsi with success and connect the ili9881c with dsi. All the two lanes are driven with signals that I checked with oscilloscope, but clock lines remain static a 200mV, no clock signal on both P and N pins.
I'm using Compulab BSP Release ucm-imx93 3.0 25.02 based on NXP i.MX Release Distro 6.6-scarthgap ucm-imx93 ttyLP0
{
dsi_backlight: dsi_backlight {
compatible = "pwm-backlight";
pwms = <&tpm4 2 50000 0>;
brightness-levels = <0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67
68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100>;
default-brightness-level = <98>;
status = "okay";
};
};
&iomuxc {
pinctrl_tpm4: tpm4grp {
fsl,pins = <
MX93_PAD_GPIO_IO13__TPM4_CH20x59e
>;
};
};
&tpm4 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_tpm4>;
status = "okay";
};
&ldb {
status = "disabled";
};
&ldb_phy {
status = "disabled";
};
&lcdif {
assigned-clock-rates = <300000000>, <100000000>, <400000000>, <133333333>;
status = "okay";
};
&dsi {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
panel@0 {
compatible = "bananapi,lhr050h41", "ilitek,ili9881c";
backlight = <&dsi_backlight>;
enable-gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;
reset-gpios = <&gpio1 9 GPIO_ACTIVE_HIGH>;
reg = <0>;
dsi-lanes = <2>;
video-mode = <2>;
panel-width-mm = <87>;
panel-height-mm = <87>;
status = "okay";
panel-timing {
clock-frequency = <50000000>; /* LCM_PCLK */
/* X */
hsync-len = <24>; /* LCM_HSA */
hback-porch = <100>; /* LCM_HBP */
hactive = <800>; /* LCM_HACT */
hfront-porch = <50>; /* LCM_HFP */
/* Y */
vsync-len = <4>; /* LCM_VSA */
vback-porch = <20>; /* LCM_VBP */
vactive = <800>; /* LCM_VACT */
vfront-porch = <8>; /* LCM_VFP */
};
port {
panel_in: endpoint {
remote-endpoint = <&dsi_out>;
};
};
};
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
dsi_input: endpoint {
};
};
port@1 {
reg = <1>;
dsi_out: endpoint {
remote-endpoint = <&panel_in>;
};
};
};
};
&dphy {
status = "okay";
};
