V4L/DVB (9328): ivtvfb: FB_BLANK_POWERDOWN turns off video output

When using FBIOBLANK, FB_BLANK_POWERDOWN will now switch off the video output.
Since some televisions turn themselves off after a while with no signal, this
is the closest we can get to power-saving.
Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/ivtv/ivtv-i2c.c

@@ -726,6 +726,7 @@ int ivtv_saa7127(struct ivtv *itv, unsigned int cmd, void *arg)
 {
 	return ivtv_call_i2c_client(itv, IVTV_SAA7127_I2C_ADDR, cmd, arg);
 }
+EXPORT_SYMBOL(ivtv_saa7127);
 
 int ivtv_saa717x(struct ivtv *itv, unsigned int cmd, void *arg)
 {

drivers/media/video/ivtv/ivtvfb.c

@@ -48,6 +48,7 @@
 #endif
 
 #include "ivtv-driver.h"
+#include "ivtv-i2c.h"
 #include "ivtv-udma.h"
 #include "ivtv-mailbox.h"
 
@@ -894,11 +895,16 @@ static int ivtvfb_blank(int blank_mode, struct fb_info *info)
 	switch (blank_mode) {
 	case FB_BLANK_UNBLANK:
 		ivtv_vapi(itv, CX2341X_OSD_SET_STATE, 1, 1);
+		ivtv_saa7127(itv, VIDIOC_STREAMON, NULL);
 		break;
 	case FB_BLANK_NORMAL:
 	case FB_BLANK_HSYNC_SUSPEND:
 	case FB_BLANK_VSYNC_SUSPEND:
+		ivtv_vapi(itv, CX2341X_OSD_SET_STATE, 1, 0);
+		ivtv_saa7127(itv, VIDIOC_STREAMON, NULL);
+		break;
 	case FB_BLANK_POWERDOWN:
+		ivtv_saa7127(itv, VIDIOC_STREAMOFF, NULL);
 		ivtv_vapi(itv, CX2341X_OSD_SET_STATE, 1, 0);
 		break;
 	}