@retroman Has been updated, please check.

@顾真牛 谢谢你的建议。后续考虑支持。

There are many options for LCD with Cool Pi driving edp interface.

• DP directly drives edp
  The two protocols are basically the same. At present, only a few edp interface screens can not be lit normally according to the test results.

DP PIN number	Signal	edp Signal
16	DP_AUXP	eDP_AUXP
18	DP_AUXN	eDP_AUXN
3	DP_TX0P	eDP_TX0P
5	DP_TX0N	eDP_TX0N
9	DP_TX1P	eDP_TX1P
11	DP_TX1N	eDP_TX1N

• Mipi dsi to edp
  Specification LT8911EXB_Datasheet_R1.0.pdf
  

• HDMI interface direct drive
  The RK3588S HDMI interface can be compatible with HDMI or edp functions. By modifying the DTS configuration, the HDMI interface signal can be directly used as an edp signal. The following figure lists the corresponding relationship between HDMI and edp signals.

HDMI PIN number	Signal	edp Signal
2	HDMI0_SBDP	eDP_AUXP
1	HDMI0_SBDN	eDP_AUXN
9	HDMI0_TX0P_PORT	eDP_TX0P
11	HDMI0_TX0N_PORT	eDP_TX0N
6	HDMI0_TX1P_PORT	eDP_TX1P
8	HDMI0_TX1N_PORT	eDP_TX1N
3	HDMI0_TX2P_PORT	eDP_TX2P
5	HDMI0_TX2N_PORT	eDP_TX2N
12	HDMI0_TX3P_PORT	eDP_TX3P
14	HDMI0_TX3N_PORT	eDP_TX3N

Cool Pi does not have a TTL interface. If you want to drive a TTL interface screen, you need to use a bridge chip. At present, the MIPI to TTL interface chip supports ICN6211 by default. The following details how to use ICN6211 to drive a TTL interface LCD module.

• Specification
  ICN6211_mipi2rgb.brd
  MIPI_RGB_162.DSN
  ICN6211_MIPI_RGB_specification_V04.pdf

• Block diagram
  

• DTS configuration
  Enable the following nodes，mipi_dcphy0 dsi0 dsi0_in_vp3 backlight pwm13 .

&mipi_dcphy0 {
	status = "okay";
};

&dsi0 {
	status = "okay";
	dsi0_panel: panel@0 {
		status = "okay";
		compatible = "simple-panel-dsi";
		reg = <0>;
		backlight = <&backlight>;
		reset-delay-ms = <60>;
		enable-delay-ms = <60>;
		prepare-delay-ms = <60>;
		unprepare-delay-ms = <60>;
		disable-delay-ms = <60>;
		dsi,flags = <(MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
			MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET)>;
		dsi,format = <MIPI_DSI_FMT_RGB888>;
		dsi,lanes  = <2>;
		panel-init-sequence = [
	    23 00 02 7A C1
	    23 00 02 20 20
	    23 00 02 21 E0
	    23 00 02 22 13
            23 00 02 23 08
            23 00 02 24 04
            23 00 02 25 08
            23 00 02 26 00
            23 00 02 27 08
            23 00 02 28 04
            23 00 02 29 08
            23 00 02 34 80
            23 00 02 86 29
            23 00 02 B5 A0
            23 00 02 5C FF
            23 00 02 2A 01
            23 00 02 56 92
            23 00 02 6B 71
            23 00 02 69 15
            23 00 02 10 40
            23 00 02 11 88
            23 00 02 B6 20
            23 00 02 51 20
            23 00 02 09 10
	    05 78 01 11
	    05 1E 01 29
		];

		panel-exit-sequence = [
			05 00 01 28
			05 00 01 10
		];

		disp_timings0: display-timings {
			native-mode = <&dsi0_timing0>;
			dsi0_timing0: timing0 {
				clock-frequency = <25000000>;
				hactive = <800>;
				vactive = <480>;
				hfront-porch = <8>;
				hsync-len = <4>;
				hback-porch = <8>;
				vfront-porch = <8>;
				vsync-len = <4>;
				vback-porch = <8>;
				hsync-active = <0>;
				vsync-active = <0>;
				de-active = <0>;
				pixelclk-active = <0>;
			};
		};

		ports {
			#address-cells = <1>;
			#size-cells = <0>;

			port@0 {
				reg = <0>;
				panel_in_dsi: endpoint {
					remote-endpoint = <&dsi_out_panel>;
				};
			};
		};
	};

	ports {
		#address-cells = <1>;
		#size-cells = <0>;

		port@1 {
			reg = <1>;
			dsi_out_panel: endpoint {
				remote-endpoint = <&panel_in_dsi>;
			};
		};
	};

};

&dsi0_in_vp3 {
	status = "okay";
};

&backlight {
	pwms = <&pwm13 0 25000 0>;
	status = "okay";
};

&pwm13 {
	status = "okay";
	pinctrl-names = "active";
	pinctrl-0 = <&pwm13m2_pins>;
};

• Configure lcdc parameters according to LCD specifications.
  LCD specification 5inch DSI LCD (B).pdf
  

		disp_timings0: display-timings {
			native-mode = <&dsi0_timing0>;
			dsi0_timing0: timing0 {
				clock-frequency = <25000000>;
				hactive = <800>;
				vactive = <480>;
				hfront-porch = <8>;
				hsync-len = <4>;
				hback-porch = <8>;
				vfront-porch = <8>;
				vsync-len = <4>;
				vback-porch = <8>;
				hsync-active = <0>;
				vsync-active = <0>;
				de-active = <0>;
				pixelclk-active = <0>;
			};
		};

• Generate the initialization sequence of ICN6211 according to the LCD specification.
  ICN6211 initialization tool ICN6211 Config.rar

Copy the initialization sequence to DTS according to the command format of rockchip.
Command format description：
23 00 02 7A C1
[Command word] [Delay] [Packet length] [Register] [Value]
Note that the last 11 29 command is reserved. This is the DSI standard command to open the display.

panel-init-sequence = [
	    23 00 02 7A C1
	    23 00 02 20 20
	    23 00 02 21 E0
	    23 00 02 22 13
            23 00 02 23 08
            23 00 02 24 04
            23 00 02 25 08
            23 00 02 26 00
            23 00 02 27 08
            23 00 02 28 04
            23 00 02 29 08
            23 00 02 34 80
            23 00 02 86 29
            23 00 02 B5 A0
            23 00 02 5C FF
            23 00 02 2A 01
            23 00 02 56 92
            23 00 02 6B 71
            23 00 02 69 15
            23 00 02 10 40
            23 00 02 11 88
            23 00 02 B6 20
            23 00 02 51 20
            23 00 02 09 10
	    05 78 01 11
	    05 1E 01 29
		];

• The TTL signal can be output normally by recompiling and replacing the kernel.
  

@retroman The latest firmware is temporarily not compatible with the V10 version of WIFI and BT configurations. This problem will be solved as soon as possible. Please pay attention to the update.

@tonyone0902 上传图片上来看看，HDMI正常是按照EDID来选择分辨率，手动选择之后是可以保存的。不太清楚画面变胖是什么意思？

@retroman said in Coolpi 4B armbian support:

Vulkan

Sorry, Vulkan is not supported for the time being. Please pay attention to the following updates.

@kingpin1cn 系统固件版本？

@tonyone0902 This is usually caused by unstable power supply, such as insufficient input power of the adapter, or power failure at the moment of switching.

@reddfoxx Refer to attachment link：
https://www.aliexpress.us/item/3256803830903295.html?spm=a2g0o.productlist.main.51.2d623ca45F44fO&algo_pvid=370776b3-bc3a-44b3-b469-07b7abd5eb71&algo_exp_id=370776b3-bc3a-44b3-b469-07b7abd5eb71-25&pdp_ext_f={"sku_id"%3A"12000027750691599"}&pdp_npi=2%40dis!USD!0.17!0.13!!!!!%40212244c416739165017785791d0685!12000027750691599!sea&curPageLogUid=LiqQEObfPtMi

@HiramXMaxim Please provide the model of the card reader you use, or take a photo and send it to us. Let's buy the same model and test it. thank you.

@HiramXMaxim This may be the compatibility problem of the card reader. You can first make the image into the TF card, and then use the migration script of armbian to migrate the image to EMMC.

@bbsvs2000 CH341默认内核config里边没有打开，如下图所示打开配置重新编译内核再测试。

@retroman The problem of wifi bt has been solved. Please follow github to submit or download the latest firmware test. Thank you.

@retroman The problem of WIFI BT is being solved. An update will be released in the next few days.

@retroman Please follow that github will continue to update, thank you.

@retroman https://www.cool-pi.com/topic/162/how-to-upgrade-the-boot-loader-of-coolpi-4b?_=1673496991046

If you need to boot armbian normally, you need to update the loader file to version 0104.

Follow the steps below to update the loader:

• Download the latest loader file One Drive
  ![5594e1d4-3a7b-46fc-a7b5-2a9fe418dfc0-image.png]
  

• Short the 2 pins shown by the arrow.
  

• The USB interface and computer connection.
  

• Plug in the power supply and open the upgrade software. The machine enters the maskrom upgrade mode.
  

• choose to write by address
  

• Click Execute to complete the loader update.
  

• If the computer prompts that the USB driver cannot be found, please download and install the driver software first.One Drive
  

@retroman Try formatting the TF card before mirroring it. If it does not work properly, it is recommended to upgrade the loader file.

@HiramXMaxim The EMMC small board has an adapter for converting to TF card, which can be written to the EMMC using a common card reader. As shown in the figure below.