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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: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -108,13 +108,16 @@ static char *dlfb_vidreg_unlock(char *buf)
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/*
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* On/Off for driving the DisplayLink framebuffer to the display
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* 0x00 H and V sync on
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* 0x01 H and V sync off (screen blank but powered)
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* 0x07 DPMS powerdown (requires modeset to come back)
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*/
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static char *dlfb_enable_hvsync(char *buf, bool enable)
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{
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if (enable)
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return dlfb_set_register(buf, 0x1F, 0x00);
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else
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return dlfb_set_register(buf, 0x1F, 0x01);
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return dlfb_set_register(buf, 0x1F, 0x07);
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}
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static char *dlfb_set_color_depth(char *buf, u8 selection)
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@ -936,30 +939,31 @@ static int dlfb_ops_set_par(struct fb_info *info)
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return dlfb_set_video_mode(dev, &info->var);
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}
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/*
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* In order to come back from full DPMS off, we need to set the mode again
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*/
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static int dlfb_ops_blank(int blank_mode, struct fb_info *info)
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{
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struct dlfb_data *dev = info->par;
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if (blank_mode != FB_BLANK_UNBLANK) {
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char *bufptr;
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struct urb *urb;
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urb = dlfb_get_urb(dev);
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if (!urb)
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return 0;
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bufptr = (char *) urb->transfer_buffer;
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/* overloading usb_active. UNBLANK can conflict with teardown */
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bufptr = dlfb_vidreg_lock(bufptr);
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if (blank_mode != FB_BLANK_UNBLANK) {
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atomic_set(&dev->usb_active, 0);
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bufptr = dlfb_enable_hvsync(bufptr, false);
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} else {
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atomic_set(&dev->usb_active, 1);
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bufptr = dlfb_enable_hvsync(bufptr, true);
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}
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bufptr = dlfb_vidreg_unlock(bufptr);
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dlfb_submit_urb(dev, urb, bufptr - (char *) urb->transfer_buffer);
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dlfb_submit_urb(dev, urb, bufptr -
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(char *) urb->transfer_buffer);
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} else {
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dlfb_set_video_mode(dev, &info->var);
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}
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return 0;
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}
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