/* Sets VESA Display Power Management Signaling (DPMS) Mode */
static void RADEONDisplayPowerManagementSet(ScrnInfoPtr pScrn,
					    int PowerManagementMode,
					    int flags)
{
    RADEONInfoPtr  info       = RADEONPTR(pScrn);
    unsigned char *RADEONMMIO = info->MMIO;

#ifdef XF86DRI
    if (info->CPStarted) DRILock(pScrn->pScreen, 0);
#endif

    if (info->accelOn) info->accel->Sync(pScrn);

    if (info->FBDev) {
	fbdevHWDPMSSet(pScrn, PowerManagementMode, flags);
    } else {
	int             mask1     = (RADEON_CRTC_DISPLAY_DIS |
				     RADEON_CRTC_HSYNC_DIS |
				     RADEON_CRTC_VSYNC_DIS);
	int             mask2     = (RADEON_CRTC2_DISP_DIS |
				     RADEON_CRTC2_VSYNC_DIS |
				     RADEON_CRTC2_HSYNC_DIS);

	/* TODO: additional handling for LCD ? */

	switch (PowerManagementMode) {
	case DPMSModeOn:
	    /* Screen: On; HSync: On, VSync: On */
	    if (info->IsSecondary)
		OUTREGP(RADEON_CRTC2_GEN_CNTL, 0, ~mask2);
	    else {
		if (info->Clone)
		    OUTREGP(RADEON_CRTC2_GEN_CNTL, 0, ~mask2);
		OUTREGP(RADEON_CRTC_EXT_CNTL, 0, ~mask1);
	    }
	    break;

	case DPMSModeStandby:
	    /* Screen: Off; HSync: Off, VSync: On */
	    if (info->IsSecondary)
		OUTREGP(RADEON_CRTC2_GEN_CNTL,
			RADEON_CRTC2_DISP_DIS | RADEON_CRTC2_HSYNC_DIS,
			~mask2);
	    else {
		if (info->Clone)
		    OUTREGP(RADEON_CRTC2_GEN_CNTL,
			    RADEON_CRTC2_DISP_DIS | RADEON_CRTC2_HSYNC_DIS,
			    ~mask2);
		OUTREGP(RADEON_CRTC_EXT_CNTL,
			RADEON_CRTC_DISPLAY_DIS | RADEON_CRTC_HSYNC_DIS,
			~mask1);
	    }
	    break;

	case DPMSModeSuspend:
	    /* Screen: Off; HSync: On, VSync: Off */
	    if (info->IsSecondary)
		OUTREGP(RADEON_CRTC2_GEN_CNTL,
			RADEON_CRTC2_DISP_DIS | RADEON_CRTC2_VSYNC_DIS,
			~mask2);
	    else {
		if (info->Clone)
		    OUTREGP(RADEON_CRTC2_GEN_CNTL,
			    RADEON_CRTC2_DISP_DIS | RADEON_CRTC2_VSYNC_DIS,
			    ~mask2);
		OUTREGP(RADEON_CRTC_EXT_CNTL,
			RADEON_CRTC_DISPLAY_DIS | RADEON_CRTC_VSYNC_DIS,
			~mask1);
	    }
	    break;

	case DPMSModeOff:
	    /* Screen: Off; HSync: Off, VSync: Off */
	    if (info->IsSecondary)
		OUTREGP(RADEON_CRTC2_GEN_CNTL, mask2, ~mask2);
	    else {
		if (info->Clone)
		    OUTREGP(RADEON_CRTC2_GEN_CNTL, mask2, ~mask2);
		OUTREGP(RADEON_CRTC_EXT_CNTL, mask1, ~mask1);
	    }
	    break;
	}
    }

#ifdef XF86DRI
    if (info->CPStarted) DRIUnlock(pScrn->pScreen);
#endif
}