环球热推荐:RK3588使用RK628D之HDMI转成双路LVDS信号接LVDS屏幕
1. 简介
本文是基于RK3588平台,SDK版本:RK3588_ANDROID12.0 RK628D调试总结。视频桥接芯片:RK628D驱动代码:"kernel-5.10driversmisck628"(驱动用的是rk628-for-all-v21版本)本次调试的方案功能:从SOC出来的HDMITX通过RK628D转成双路LVDS信号接LVDS屏幕。2. 视频桥接芯片RK628D调试
2.1 RK628驱动介绍
RK628 分为 Display 通路和 HDMI IN 通路,SDK 版本 Display 通路基于DRM框架,HDMI IN 通路基于
V4L2框架。
(资料图)
RK628-For-All 版本驱动一样也分为Display 通路和 HDMI IN 通路,Display 通路的驱动于drivers/misc/rk628/
下,HDMI IN 通路的驱动于drivers/media/i2c/rk628/下。本文采用RK628-For-All 版本Display 通路:MISC
2.2 调试总览,调试步骤分析
步骤 ① 移植RK628D_For_All_V21的驱动代码步骤 ② dts配置步骤 ③ 编译,烧写。2.3 调试过程
步骤 ① :移植RK628D_For_All_V21的驱动代码1.联系RK业务拿到最新的RK628-for-all版本代码。
本文是基于RK628-for-all-v21版本。要移植RK628D_For_All的驱动代码。
采取手动打补丁的方式移植:因为自动打补丁会因为SDK版本差异,代码不一致导致报错。
2.rockchip_defconfig,Kconfig,Makefile配置
rockchip_defconfig配置:关闭SDK系统自带的rk628d配置,开启rk628-for-all版本的配置:
CONFIG_DRM=y(系统默认是打开)
CONFIG_RK628_MISC=y
CONFIG_ROCKCHIP_THUNDER_BOOT_RK628=y
(下面两项在"kernel-5.10driversmisck628Kconfig"已经默认设置为y了,可以不用在rockchip_defconfig中再配置)
MISC配置如下:
将rk628驱动添加进编译规则。
Kconfig配置 :添加 source "drivers/misc/rk628/Kconfig"
Kconfig路径 :"kernel-5.10driversmiscKconfig"
Makefile配置 :添加 obj-y += rk628/
Makefile路径 :"kernel-5.10driversmiscKconfig"
rk628-for-all版本驱动配置如下:
Kconfig配置 :添加 config RK628_MISC 和 config ROCKCHIP_THUNDER_BOOT_RK628说明
Kconfig路径 :"kernel-5.10driversmisck628Kconfig"
Makefile配置 :添加RK628_MISC驱动和obj-$(CONFIG_DRM) += rk628_hdmitx.o
Makefile路径 :"kernel-5.10driversmisck628Makefile"
3.驱动手动打补丁:
① 将rk628文件夹复制到"kernel-5.10driversmisck628"
② kernel-5.10driversgpuhdmi强制输出固定分辨率 绕过读edid流程
kernel-5.10\\drivers\\i2c 提前i2c设备的注册 以加快rk628的初始化 kernel-5.10\\drivers\\base 增加宏主要是为了实现regmap文件结点可以写628寄存器kernel-5.10\\drivers\\pwm 提前pwm设备的注册 以加快rk628的初始化kernel-5.10\\drivers\\video 提前backlight设备的注册 以加快rk628的初始化
注意: driversgpudrmridgesynopsysdw-hdmi-qp.c 此c文件的第一组分辨率改成你要固定的分辨率 1920*1080
步骤 ② dts配置rk628-for-all的dts配置&i2c6 { //clock-frequency = < 400 >; pinctrl-names = "default"; pinctrl-0 = < &i2c6m0_xfer >; status = "okay"; rk628: rk628@50 { compatible = "rockchip,rk628"; reg = < 0x50 >; interrupt-parent = < &gpio4 >; interrupts = < 22 IRQ_TYPE_LEVEL_HIGH >; //pinctrl-names = "default"; //pinctrl-0 = < &rk628power >; enable-gpios = < &gpio4 RK_PD5 GPIO_ACTIVE_HIGH >; reset-gpios = < &gpio2 RK_PB6 GPIO_ACTIVE_LOW >; //panel-enable-gpios = < &gpio2 RK_PC1 GPIO_ACTIVE_HIGH >; panel-backlight = < &backlight_lvds >; status = "okay"; rk628,hdmi-in; rk628-lvds{ /* "jeida_18","vesa_24","vesa_18" */ bus-format = "vesa_24"; //bus-format = "jeida_18"; /* "dual_link_odd_even_pixels" * "dual_link_even_odd_pixels" * "dual_link_left_right_pixels" * "dual_link_right_left_pixels" */ link-type = "dual_link_even_odd_pixels"; //link-type = "dual_link_odd_even_pixels"; status = "okay"; }; display-timings { src-timing { clock-frequency = < 148500000 >; hactive = < 1920 >; vactive = < 1080 >; hback-porch = < 148 >; hfront-porch = < 88 >; vback-porch = < 6 >; vfront-porch = < 4 >; hsync-len = < 44 >; vsync-len = < 5 >; hsync-active = < 0 >; vsync-active = < 0 >; de-active = < 0 >; pixelclk-active = < 0 >; }; dst-timing { clock-frequency = < 148500000 >; hactive = < 1920 >; vactive = < 1080 >; hback-porch = < 148 >; hfront-porch = < 88 >; vback-porch = < 6 >; vfront-porch = < 4 >; hsync-len = < 44 >; vsync-len = < 5 >; hsync-active = < 0 >; vsync-active = < 0 >; de-active = < 0 >; pixelclk-active = < 0 >; }; }; };};
hdmi的dts配置:&hdmi0 { status = "okay";};&hdmi0_in_vp0{status = "okay";};&hdptxphy_hdmi0 { status = "okay"; };&dsi0{status = "disabled";};&dsi1 { status = "disabled";};
2.4 调试命令,方法
命令:
1. cat sys/kernel/debug/dri/0/summary2. dmesg | grep rk6283. cat /sys/kernel/debug/gpio 查看gpio占用状态4. dmesg | grep src 查看src(cpu输出的hdmi信号)状态5. dmesg | grep “rxphy power” 查看rxphy power是否上电6. dmesg | grep vop查看显示信息或者dmesg | grep drm7. dmesg | grep stable查看628clock是否起来。8. cat sys/kernel/debug/rk628/summary
3. 调试成功
审核编辑:汤梓红
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