@tonyone0902
1.设备树里边把不需要的模块可以disabled掉。
2.AI算法使用RKNN处理，尽量不直接用CPU跑.
3.应用层图像数据拷贝和格式转换使用RGA硬件模块实现，能效比高很多。
4.如果是USB摄像头，MJPG解码使用rkmpp硬件解码。

Coolpi supports UMS to update emmc firmware, as follows:

1. Update the latest versions of loader and uboot images. You can also synchronize uboot code and compile it yourself.

git clone https://github.com/yanyitech/coolpi-loader
cd coolpi-loader
./build-uboot.sh cp4b

2. Connect a dual A port USB cable to the computer and the upper USB 3.0 interface. Plug in the power and press the power button three times, and the machine will enter UMS mode.
   
3. Use Etcher software to update the software.
   

Through the continuous efforts of engineers, coolpi can perfectly support 32GB LPDDR4/4X memory. There is better support for AI large models and server scenarios. The 32GB version of the 4b machine will be officially released in May. Thank you for your support.

Clock rate up to 2112M, data rate 4224M.

@Mz3D-0 https://m.aliexpress.us/item/3256804720174638.html?pdp_npi=2%40dis!USD!US %2426.00!US %2426.00!!!!!%4021362f1a16692846083578177ef8d3!12000031062891912!sh01&spm=a2g0o.store_pc_home.productList_2001412105888.pic_0&_randl_shipto=US&gatewayAdapt=Pc2Msite

@Mz3D-0

1. Can support mesa GPU driver, compatible with X11 WAYLAND
2. Currently maximum 128 G, more than 128 G need to be customized, such as 256 G.

@Mz3D-0 You can purchase the CP4B official radiator kit from the agent

@wuming 能否识别maskrom，如果不行就联系代理商。

@wuming 尝试是否能正常识别maskrom，按住loader按键再上电。USB线连接电脑。

Wiki provides the information of each product download, will be further improved in the future, thank you for your support.
https://wiki.cool-pi.com/en/home

@顾真牛 改为动态分频测试一下

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts b/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts
index da170f0b2086..3f01ba675516 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts
@@ -1015,6 +1015,10 @@ &hdptxphy_hdmi0 {
        status = "okay";
 };
 
+&hdptxphy_hdmi_clk0 {
+status = "okay";
+};
+
 #if 1
 &hdmi1 {
        enable-gpios = <&gpio4 RK_PB2 GPIO_ACTIVE_HIGH>;
@@ -1044,6 +1048,10 @@ &route_hdmi1 {
 &hdptxphy_hdmi1 {
        status = "okay";
 };
+
+&hdptxphy_hdmi_clk1 {
+status = "okay";
+};
 #endif
 
 &dp0 {
@@ -1304,6 +1312,8 @@ &uart2 {
 };
 
 &display_subsystem {
+       clocks = <&hdptxphy_hdmi_clk0>, <&hdptxphy_hdmi_clk1>;
+       clock-names = "hdmi0_phy_pll", "hdmi1_phy_pll";
        memory-region = <&drm_logo>;
        memory-region-names = "drm-logo";
 };

@顾真牛 插拔HDMI然后打印dmesg发上来。

DRM 框架目前代码已经支持了绝大部分分辨率时序，但是部分 HDMI 屏幕旋转的场景下，可能还有一些特殊分辨率不支持。需要在 kernel\drivers\gpu\drm\drm_edid.c 中的drm_dmt_modes 的末尾新增项目：

/* 0x58 - 4096x2160@59.94Hz RB */
{ DRM_MODE("4096x2160", DRM_MODE_TYPE_DRIVER, 556188, 4096, 4104,
4136, 4176, 0, 2160, 2208, 2216, 2222, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },

@likeshixi 提供插拔HDMI的dmesg信息

@顾真牛 下周发布底板的设计资料。

@顾真牛 uboot 和kernel 搜索edid.c 有个白名单把你的分辨率加进去 static const struct base_drm_display_mode resolution_white[]

@george 再增加一款13.3寸 1080P N133HCE-GP1

@顾真牛 可以抓下开机log和这个显示器的edid：
cat /sys/class/drm/card0-HDMI*/edid > /data/edid.bin

@顾真牛 正常标准30PIN EDP 接口的都可以用，这个是我笔记本拆下来的，不是买的。

@顾真牛 目前默认是性能模式，可以切换到普通模式，散热器版本也有更新。也可以加风扇。

@顾真牛 非标分辨率需要把EDID读出来，解析以后把参数加到内核里边就可以了。