本帖最后由 shengzhaodong 于 2016-2-23 11:45 编辑
boot采用3.14.28, kernel版本3.18.22，板子是自己layout的（修改了部分），使用的dts方式，usb/lan/sd card/uart等都已经可用。HDMI的修改如下：
- &hdmi {
- compatible = "fsl,imx6dl-hdmi";
- ddc-i2c-bus = <&i2c2>;
- status = "okay";
- };
- // used by hdmi
- &i2c2 {
- clock-frequency = <100000>;
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_i2c2>;
- status = "okay";
- };
- 。。。
- &iomuxc {
- ...
- pinctrl_i2c2: i2c2grp {
- fsl,pins = <
- MX6QDL_PAD_EIM_EB2__I2C2_SCL 0x4001b8b1
- MX6QDL_PAD_KEY_ROW3__I2C2_SDA 0x4001b8b1
- >;
- };
- };
问题是点不亮显示器（DELL, 1920*1080p），热插拔HDMI线时，显示器会亮一下，然后提示未检测到信号并进入休眠状态。
boot的显示参数如下
bootargs=noinitrd console=ttymxc1,115200 root=/dev/mmcblk0p1 rw init=/linuxrc ${displayargs}
displayargs=video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 video=mxcfb1: off video=mxcfb2: off fbmem=48M
启动日志中关于hdmi的内容如下：
[ 3.148028] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 3.154704] [drm] No driver support for vblank timestamp query.
[ 3.161246] imx-drm display-subsystem: bound imx-ipuv3-crtc.0 (ops ipu_crtc_ops)
[ 3.168885] imx-drm display-subsystem: bound imx-ipuv3-crtc.1 (ops ipu_crtc_ops)
[ 3.176975] imx-hdmi 120000.hdmi: Detected HDMI controller 0x13:0x1a:0xa0:0xc1
[ 3.184558] imx-drm display-subsystem: bound 120000.hdmi (ops hdmi_ops)
[ 3.189366] mmc0: host does not support reading read-only switch, assuming write-enable
[ 3.197033] mmc0: new high speed SDHC card at address e624
[ 3.198518] mmcblk0: mmc0:e624 SS08G 7.40 GiB
[ 3.211846] mmcblk0: p1
[ 3.325727] Console: switching to colour frame buffer device 240x67
[ 3.346237] imx-drm display-subsystem: fb0: frame buffer device
[ 3.352285] imx-drm display-subsystem: registered panic notifier
[ 3.379172] [drm] Initialized imx-drm 1.0.0 20120507 on minor 0
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