Connecting a dsi display

[alfek]

how do I need to change rk3588-cpcm5-evb.dts to make dsi0 work? I plan to put i2c on C0, C1?

[george]

@alfek
The DSI node can be enabled as follows.I didn't understand which GPIO C0 C1 corresponds to, please indicate.

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb-v11.dts b/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb-v11.dts
index 5f52819c2e9b..fa505ddfe99d 100755
--- a/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb-v11.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb-v11.dts
@@ -526,7 +526,7 @@ &sdmmc {
 };
 
 &dsi0 {
-       status = "disabled";
+       status = "okay";
        dsi0_panel: panel@0 {
                status = "okay";
                compatible = "simple-panel-dsi";
@@ -779,7 +779,7 @@ &dsi0_in_vp3 {
 
 
 &route_dsi0 {
-       status = "disabled";
+       status = "okay";
        connect = <&vp3_out_dsi0>;
 };

[alfek]

@george yes, sorry, I didn't specify
I plan to use GPIO1_C0_1V8_U and GPIO1_C0_1V8_U
And can you tell me how I can convert the corrected dts to dtb? It doesn't work with dtc, as far as I understand, because of include dependencies

[george]

@alfek

• First, synchronize the code using the following command:

https://github.com/yanyitech/coolpi-kernel.git

• Open the corresponding DTS file and modify the DSI related configuration

vim arch/arm64/boot/dts/rockchip/rk3588-cpcm5-evb.dts

&dsi0 {
        status = "okay";
        //rockchip,lane-rate = <1000>;
        dsi0_panel: panel@0 {
                status = "disabled";
                compatible = "simple-panel-dsi";
                reg = <0>;
                backlight = <&backlight>;
                reset-delay-ms = <10>;
                enable-delay-ms = <10>;
                prepare-delay-ms = <10>;
                unprepare-delay-ms = <10>;
                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  = <4>;
                panel-init-sequence = [
                        05 78 01 11
                        05 00 01 29
                ];

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

• Use the following command to recompile the kernel

 ./build-kernel.sh 

Welcome to using Coolpi Development Board!
------------------------------------------
Please enter a number to select your machine

1. cp4b
2. cp4b-hdmi-in
3. cm5-evb
4. cm5-evb-v11
5. cm5-minipc
6. cm5-notebook
7. cm5-notebook-v20
8. cm5-8uart
9. cpnano
10. exit

Enter option number: 3
BOARD=cm5-evb
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
  HOSTCC  scripts/kconfig/confdata.o
  HOSTCC  scripts/kconfig/expr.o
  LEX     scripts/kconfig/lexer.lex.c
  YACC    scripts/kconfig/parser.tab.[ch]
  HOSTCC  scripts/kconfig/lexer.lex.o
  HOSTCC  scripts/kconfig/menu.o
  HOSTCC  scripts/kconfig/parser.tab.o
  HOSTCC  scripts/kconfig/preprocess.o
  HOSTCC  scripts/kconfig/symbol.o
  HOSTCC  scripts/kconfig/util.o
  HOSTLD  scripts/kconfig/conf
#
# configuration written to .config
#
  SYNC    include/config/auto.conf.cmd
  HOSTCC  scripts/dtc/dtc.o
  HOSTCC  scripts/dtc/flattree.o
  HOSTCC  scripts/dtc/fstree.o
  HOSTCC  scripts/dtc/data.o
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/dtc/treesource.o
  HOSTCC  scripts/dtc/srcpos.o
  HOSTCC  scripts/dtc/checks.o
  HOSTCC  scripts/dtc/util.o
  LEX     scripts/dtc/dtc-lexer.lex.c
  YACC    scripts/dtc/dtc-parser.tab.[ch]
  HOSTCC  scripts/dtc/libfdt/fdt.o
  HOSTCC  scripts/dtc/libfdt/fdt_ro.o
  HOSTCC  scripts/dtc/libfdt/fdt_wip.o
  HOSTCC  scripts/dtc/libfdt/fdt_sw.o
  HOSTCC  scripts/dtc/libfdt/fdt_rw.o
  HOSTCC  scripts/dtc/libfdt/fdt_strerror.o
  HOSTCC  scripts/dtc/libfdt/fdt_empty_tree.o
  HOSTCC  scripts/dtc/libfdt/fdt_addresses.o
  HOSTCC  scripts/dtc/libfdt/fdt_overlay.o
  HOSTCC  scripts/dtc/fdtoverlay.o
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  HOSTCC  scripts/dtc/dtc-parser.tab.o

• Update the dtb file to the /boot/firmware directory

[alfek]

@george thank you, it worked.
How can I customize screen resolution? 800x480. And how do I still configure i2c?

[alfek]

@george
Could you help? does it give this error when connecting?
[ 8.515533] dw-mipi-dsi2 fde20000.dsi: [drm:dw_mipi_dsi2_bind] ERROR Failed to find panel or bridge: -517