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202409012在飞凌的OK3588-C的核心板上使用Rockchip原厂的Buildroot点MIPI屏【背光篇】

news 2025/8/4 22:29:50

202409012在飞凌的OK3588-C的核心板上使用Rockchip原厂的Buildroot点MIPI屏【背光篇】
2024/9/12 10:44

缘起，拿到一块MIPI屏，需要使用飞凌的OK3588-C的核心板在Android12下点亮。
在飞凌的Linux R4下修改部分屏参之后即可直接点亮。

但是在飞凌的Android12下竖屏横用之后，播放MP4视频时内核跑飞。
因此需要使用Rockchip原厂的SDK来进行比对。
但是Rockchip原厂的Android12的过于庞大，我于是决定先在Buildroot下点亮屏之后再迁移到Android12上了。

根据百度/CSDN的资料，点屏先开背光/屏不亮首先检查背光。
Z:\OK3588_Linux_fs\kernel\arch\arm64\boot\dts\rockchip\OK3588-C-common.dtsi
Z:\repo_RK3588_Buildroot20240508\kernel\arch\arm64\boot\dts\rockchip\rk3588-evb7-v11.dtsi

Z:\OK3588_Linux_fs\kernel\arch\arm64\boot\dts\rockchip\OK3588-C-common.dtsi
   backlight_dsi0: backlight-dsi0 {
       compatible = "pwm-backlight";
       pwms = <&pwm5 0 25000 0>;
       status = "okay";
       brightness-levels = <
           0 20 20 21 21 22 22 23
           23 24 24 25 25 26 26 27
           27 28 28 29 29 30 30 31
           31 32 32 33 33 34 34 35
           35 36 36 37 37 38 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 99 100 101 102 103
           104 105 106 107 108 109 110 111
           112 113 114 115 116 117 118 119
           120 121 122 123 124 125 126 127
           128 129 130 131 132 133 134 135
           136 137 138 139 140 141 142 143
           144 145 146 147 148 149 150 151
           152 153 154 155 156 157 158 159
           160 161 162 163 164 165 166 167
           168 169 170 171 172 173 174 175
           176 177 178 179 180 181 182 183
           184 185 186 187 188 189 190 191
           192 193 194 195 196 197 198 199
           200 201 202 203 204 205 206 207
           208 209 210 211 212 213 214 215
           216 217 218 219 220 221 222 223
           224 225 226 227 228 229 230 231
           232 233 234 235 236 237 238 239
           240 241 242 243 244 245 246 247
           248 249 250 251 252 253 254 255
       >;
       default-brightness-level = <200>;
       is-forlinx;
   };

&pwm2 { //FAN
status = "okay";
};

&pwm4 { //edp
status = "okay";
};

&pwm5 {//dsi0
pinctrl-0 = <&pwm5m1_pins>;
status = "okay";
};

&pwm6 {//dsi1
status = "okay";
};

Z:\repo_RK3588_Buildroot20240508\kernel\arch\arm64\boot\dts\rockchip\rk3588-evb7-v11.dtsi
&backlight {
pwms = <&pwm1 0 25000 0>;
status = "okay";
};

&pwm1 {
status = "okay";
};

&pwm3 {
pinctrl-0 = <&pwm3m1_pins>;
status = "okay";
};

修改为：
   wireless_wlan: wireless-wlan {
       compatible = "wlan-platdata";
       wifi_chip_type = "ap6398s";
       pinctrl-names = "default";
       pinctrl-0 = <&wifi_host_wake_irq>;
       WIFI,host_wake_irq = <&gpio0 RK_PB2 GPIO_ACTIVE_HIGH>;
       WIFI,poweren_gpio = <&gpio0 RK_PC4 GPIO_ACTIVE_HIGH>;
       status = "okay";
   };
};

&backlight {
       compatible = "pwm-backlight";
       pwms = <&pwm5 0 25000 0>;
       status = "okay";
       brightness-levels = <
           0 20 20 21 21 22 22 23
           23 24 24 25 25 26 26 27
           27 28 28 29 29 30 30 31
           31 32 32 33 33 34 34 35
           35 36 36 37 37 38 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 99 100 101 102 103
           104 105 106 107 108 109 110 111
           112 113 114 115 116 117 118 119
           120 121 122 123 124 125 126 127
           128 129 130 131 132 133 134 135
           136 137 138 139 140 141 142 143
           144 145 146 147 148 149 150 151
           152 153 154 155 156 157 158 159
           160 161 162 163 164 165 166 167
           168 169 170 171 172 173 174 175
           176 177 178 179 180 181 182 183
           184 185 186 187 188 189 190 191
           192 193 194 195 196 197 198 199
           200 201 202 203 204 205 206 207
           208 209 210 211 212 213 214 215
           216 217 218 219 220 221 222 223
           224 225 226 227 228 229 230 231
           232 233 234 235 236 237 238 239
           240 241 242 243 244 245 246 247
           248 249 250 251 252 253 254 255
       >;
       default-brightness-level = <200>;
       is-forlinx;
};

&combphy0_ps {
status = "okay";
};

   pcie {
       pcie20x1_0_clkreqn_m1: pcie20x1-0-clkreqn-m1 {
           rockchip,pins = <4 RK_PB4 RK_FUNC_GPIO &pcfg_output_low>;
       };
   };
};

&pwm1 {
status = "okay";
};

&pwm3 {
pinctrl-0 = <&pwm3m1_pins>;
status = "okay";
};

&pwm5 {//dsi0
pinctrl-0 = <&pwm5m1_pins>;
status = "okay";
};

&route_dsi0 {
status = "okay";
connect = <&vp3_out_dsi0>;
};

参考资料：

https://blog.csdn.net/weixin_43244476/article/details/130217892?ops_request_misc=&request_id=&biz_id=102&utm_term=rockchip%20rk3588%20mipi%20dsi&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-1-130217892.142^v100^pc_search_result_base4&spm=1018.2226.3001.4187

https://blog.csdn.net/weixin_43244476/article/details/130217892
Rockchip RK3588 MIPI DSI 显示驱动调试记录

调试步骤：

1、LCD背光配置
&backlight {
   pwms = <&pwm1 0 25000 0>;
   status = "okay";
};

&pwm1 {
   /* mipi lcd backlight: pwm1_m1 */
   pinctrl-0 = <&pwm1m1_pins>;
   status = "okay";
};