imx7d eink issues

[cjywy520]

关于imx7d 支持epd墨水屏的，有几个技术点不是很懂，想请问一下大家：

1、在mxc_epdc_v2_fb.c中，墨水屏驱动参数为：

static struct fb_videomode ed133ut2_mode = {

.name="ED133UT2",

.refresh=75,

.xres=1600,

.yres=1200,

.pixclock=80000000,

.left_margin=20,

.right_margin=56,

.upper_margin=4,

.lower_margin=7,

.hsync_len=4,

.vsync_len=1,

.sync=0,

.vmode=FB_VMODE_NONINTERLACED,

.flag=0,

};

refresh设置为75hz，据我了解，元太的电子墨水屏，最高只支持8hz，imx7d内核部分做了哪些处理去适配电子墨水屏呢？

2、imx7D epd驱动部分，会进入休眠模式吗？在什么情况下进入休眠模式

3、imx7d 对epd墨水屏vcom是怎么处理的，会不会在每次刷新数据后就关闭vcom呢？

[weidong_sun]

Hi Jianyu,

    Below is from i.MX Expert team, hope answers can help you !

------------------------------------

1. No. The refresh rate setting comes according to Eink's spec. The following is ED060KC1 spec. FR is 84.99Hz.

2. Yes 7d can enter suspend mode and that depends on use case. Take Android for example. When display timeout and no process sets wakeup lock, system can enter suspend. epdc driver will enter suspend then.

3. Yes. Epdc driver will turn off vcom after update is done as possible.

-----------------------------------------

Have a nice day!

BR,

Weidong