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Commit 9825f70f authored by Bernie Thompson's avatar Bernie Thompson Committed by Greg Kroah-Hartman
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staging: udlfb: add DPMS support 



Add ability to power off monitor with standard blanking interface

Used by X servers and others to manage power of dislpay

Signed-off-by: default avatarBernie Thompson <bernie@plugable.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent d46ecb9f

drivers/staging/udlfb/udlfb.c

+20 −16
Original line number Diff line number Diff line
@@ -108,13 +108,16 @@ static char *dlfb_vidreg_unlock(char *buf) 


/*

 * On/Off for driving the DisplayLink framebuffer to the display

 *  0x00 H and V sync on

 *  0x01 H and V sync off (screen blank but powered)

 *  0x07 DPMS powerdown (requires modeset to come back)

 */

static char *dlfb_enable_hvsync(char *buf, bool enable)

{

	if (enable)

		return dlfb_set_register(buf, 0x1F, 0x00);

	else

		return dlfb_set_register(buf, 0x1F, 0x01);

		return dlfb_set_register(buf, 0x1F, 0x07);

}



static char *dlfb_set_color_depth(char *buf, u8 selection)
@@ -936,30 +939,31 @@ static int dlfb_ops_set_par(struct fb_info *info) 
	return dlfb_set_video_mode(dev, &info->var);

}



/*

 * In order to come back from full DPMS off, we need to set the mode again

 */

static int dlfb_ops_blank(int blank_mode, struct fb_info *info)

{

	struct dlfb_data *dev = info->par;



	if (blank_mode != FB_BLANK_UNBLANK) {

		char *bufptr;

		struct urb *urb;



		urb = dlfb_get_urb(dev);

		if (!urb)

			return 0;

	bufptr = (char *) urb->transfer_buffer;



	/* overloading usb_active.  UNBLANK can conflict with teardown */



		bufptr = (char *) urb->transfer_buffer;

		bufptr = dlfb_vidreg_lock(bufptr);

	if (blank_mode != FB_BLANK_UNBLANK) {

		atomic_set(&dev->usb_active, 0);

		bufptr = dlfb_enable_hvsync(bufptr, false);

	} else {

		atomic_set(&dev->usb_active, 1);

		bufptr = dlfb_enable_hvsync(bufptr, true);

	}

		bufptr = dlfb_vidreg_unlock(bufptr);



	dlfb_submit_urb(dev, urb, bufptr - (char *) urb->transfer_buffer);

		dlfb_submit_urb(dev, urb, bufptr -

				(char *) urb->transfer_buffer);

	} else {

		dlfb_set_video_mode(dev, &info->var);

	}



	return 0;

}