udlfb: add more comprehensive support for DPMS FB_BLANK_* modes
Fixes earlier problems where monitor would not return from blank
Test with any DisplayLink-based USB 2.0 graphics adapter
sudo nano /sys/class/graphics/fb?/blank
and write out single digit FB_BLANK_* code from include/linux/fb.h
Supports on (0), blank (1), suspend (2,3), powerdown (4)
Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
diff --git a/include/video/udlfb.h b/include/video/udlfb.h
index 69d485a..c41f308 100644
--- a/include/video/udlfb.h
+++ b/include/video/udlfb.h
@@ -50,6 +50,7 @@
int base16;
int base8;
u32 pseudo_palette[256];
+ int blank_mode; /*one of FB_BLANK_ */
/* blit-only rendering path metrics, exposed through sysfs */
atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
atomic_t bytes_identical; /* saved effort with backbuffer comparison */