[PATCH] OMAP: DSS: DPI: disable vt-switch on suspend/resume.

These devices do not need to return to non-graphic console
for suspend, so disable that option.
This means there is less work to do in the suspend/resume cycle,
making it smoother and cheaper.


Signed-off-by: NeilBrown <neil@brown.name>

--
Hi Tomi,
 I wonder if you would consider this patch too.  It works for me and
removes pointless vt switching.  I assume no-one would need or want that
switching on suspend/resume but I guess I cannot be certain.

Maybe a module-parameter could be used if there was any uncertainty.

thanks,
NeilBrown

diff --git a/drivers/video/fbdev/omap2/dss/dpi.c b/drivers/video/fbdev/omap2/dss/dpi.c
index f83e7b030249..4a29bab4ade3 100644
--- a/drivers/video/fbdev/omap2/dss/dpi.c
+++ b/drivers/video/fbdev/omap2/dss/dpi.c

@@ -32,6 +32,7 @@
 #include <linux/string.h>
 #include <linux/of.h>
 #include <linux/clk.h>
+#include <linux/suspend.h>
 
 #include <video/omapdss.h>
 

@@ -798,6 +799,8 @@ static int omap_dpi_probe(struct platform_device *pdev)
 	mutex_init(&dpi->lock);
 
 	dpi_init_output(pdev);
+	/* No need to vt_switch in suspend/resume */
+	pm_set_vt_switch(0);
 
 	return 0;
 }