Since the eink panel will not be re-initialized after exit DSM(deep sleep mode),
it will depend on the last update content so we need keep the associated working
buffer content during DSM. The patch moves the initialization of working buffer
to probe() function and ensure it's just be initialized once and thus its
content will be kept.
The patch shall fix the following issue:
The codes as follows in unit test for clearing screen does not take effect
when enter/exit DSM.
---
printf("Blank screen\n");
memset(fb, 0xFE, screen_info.xres_virtual*screen_info.yres*screen_info.bits_per_pixel/8);
update_to_display(0, 0, screen_info.xres, screen_info.yres,
wave_mode, TRUE, 0);
---
Signed-off-by: Robby Cai <robby.cai@nxp.com>
(cherry picked from commit 87ba6d771e028f7482019a3003965b029ec08c65)
a78229c9ed