radeon_pm.c

Linux环境下视频显示卡设备的驱动程序源代码

			tmp = INPLL(pllMCLK_CNTL);
			if (rinfo->vram_width == 64) {
			    if (INREG(MEM_CNTL) & R300_MEM_USE_CD_CH_ONLY)
				tmp &= ~MCLK_CNTL__R300_DISABLE_MC_MCLKB;
			    else
				tmp &= ~MCLK_CNTL__R300_DISABLE_MC_MCLKA;
			} else {
			    tmp &= ~(MCLK_CNTL__R300_DISABLE_MC_MCLKA |
				     MCLK_CNTL__R300_DISABLE_MC_MCLKB);
			}
		}
		OUTPLL(pllMCLK_CNTL, tmp);
		return;
	}

	/* R300 */
	if (rinfo->family == CHIP_FAMILY_R300 || rinfo->family == CHIP_FAMILY_R350) {
		tmp = INPLL(pllSCLK_CNTL);
		tmp &= ~(SCLK_CNTL__R300_FORCE_VAP);
		tmp |= SCLK_CNTL__FORCE_CP;
		OUTPLL(pllSCLK_CNTL, tmp);
		radeon_msleep(15);

		tmp = INPLL(pllSCLK_CNTL2);
		tmp &= ~(SCLK_CNTL2__R300_FORCE_TCL |
			 SCLK_CNTL2__R300_FORCE_GA  |
			 SCLK_CNTL2__R300_FORCE_CBA);
		OUTPLL(pllSCLK_CNTL2, tmp);
	}

	/* Others */

	tmp = INPLL( pllCLK_PWRMGT_CNTL);
	tmp &= ~(CLK_PWRMGT_CNTL__ACTIVE_HILO_LAT_MASK|
		 CLK_PWRMGT_CNTL__DISP_DYN_STOP_LAT_MASK|
		 CLK_PWRMGT_CNTL__DYN_STOP_MODE_MASK);
	tmp |= CLK_PWRMGT_CNTL__ENGINE_DYNCLK_MODE_MASK |
	       (0x01 << CLK_PWRMGT_CNTL__ACTIVE_HILO_LAT__SHIFT);
	OUTPLL( pllCLK_PWRMGT_CNTL, tmp);
	radeon_msleep(15);

	tmp = INPLL(pllCLK_PIN_CNTL);
	tmp |= CLK_PIN_CNTL__SCLK_DYN_START_CNTL;
	OUTPLL(pllCLK_PIN_CNTL, tmp);
	radeon_msleep(15);

	/* When DRI is enabled, setting DYN_STOP_LAT to zero can cause some R200
	 * to lockup randomly, leave them as set by BIOS.
	 */
	tmp = INPLL(pllSCLK_CNTL);
	tmp &= ~SCLK_CNTL__FORCEON_MASK;

	/*RAGE_6::A11 A12 A12N1 A13, RV250::A11 A12, R300*/
	if ((rinfo->family == CHIP_FAMILY_RV250 &&
	     ((INREG(CNFG_CNTL) & CFG_ATI_REV_ID_MASK) < CFG_ATI_REV_A13)) ||
	    ((rinfo->family == CHIP_FAMILY_RV100) &&
	     ((INREG(CNFG_CNTL) & CFG_ATI_REV_ID_MASK) <= CFG_ATI_REV_A13))) {
		tmp |= SCLK_CNTL__FORCE_CP;
		tmp |= SCLK_CNTL__FORCE_VIP;
	}
	OUTPLL(pllSCLK_CNTL, tmp);
	radeon_msleep(15);

	if ((rinfo->family == CHIP_FAMILY_RV200) ||
	    (rinfo->family == CHIP_FAMILY_RV250) ||
	    (rinfo->family == CHIP_FAMILY_RV280)) {
		tmp = INPLL(pllSCLK_MORE_CNTL);
		tmp &= ~SCLK_MORE_CNTL__FORCEON;

		/* RV200::A11 A12 RV250::A11 A12 */
		if (((rinfo->family == CHIP_FAMILY_RV200) ||
		     (rinfo->family == CHIP_FAMILY_RV250)) &&
		    ((INREG(CNFG_CNTL) & CFG_ATI_REV_ID_MASK) < CFG_ATI_REV_A13))
			tmp |= SCLK_MORE_CNTL__FORCEON;

		OUTPLL(pllSCLK_MORE_CNTL, tmp);
		radeon_msleep(15);
	}
	

	/* RV200::A11 A12, RV250::A11 A12 */
	if (((rinfo->family == CHIP_FAMILY_RV200) ||
	     (rinfo->family == CHIP_FAMILY_RV250)) &&
	    ((INREG(CNFG_CNTL) & CFG_ATI_REV_ID_MASK) < CFG_ATI_REV_A13)) {
		tmp = INPLL(pllPLL_PWRMGT_CNTL);
		tmp |= PLL_PWRMGT_CNTL__TCL_BYPASS_DISABLE;
		OUTPLL(pllPLL_PWRMGT_CNTL, tmp);
		radeon_msleep(15);
	}

	tmp = INPLL(pllPIXCLKS_CNTL);
	tmp |=  PIXCLKS_CNTL__PIX2CLK_ALWAYS_ONb |
		PIXCLKS_CNTL__PIX2CLK_DAC_ALWAYS_ONb|
		PIXCLKS_CNTL__PIXCLK_BLEND_ALWAYS_ONb|
		PIXCLKS_CNTL__PIXCLK_GV_ALWAYS_ONb|
		PIXCLKS_CNTL__PIXCLK_DIG_TMDS_ALWAYS_ONb|
		PIXCLKS_CNTL__PIXCLK_LVDS_ALWAYS_ONb|
		PIXCLKS_CNTL__PIXCLK_TMDS_ALWAYS_ONb;
	OUTPLL(pllPIXCLKS_CNTL, tmp);
	radeon_msleep(15);
		
	tmp = INPLL(pllVCLK_ECP_CNTL);
	tmp |=  VCLK_ECP_CNTL__PIXCLK_ALWAYS_ONb |
		VCLK_ECP_CNTL__PIXCLK_DAC_ALWAYS_ONb;
	OUTPLL(pllVCLK_ECP_CNTL, tmp);

	/* X doesn't do that ... hrm, we do on mobility && Macs */
#ifdef CONFIG_PPC_OF
	if (rinfo->is_mobility) {
		tmp  = INPLL(pllMCLK_CNTL);
		tmp &= ~(MCLK_CNTL__FORCE_MCLKA |
			 MCLK_CNTL__FORCE_MCLKB |
			 MCLK_CNTL__FORCE_YCLKA |
			 MCLK_CNTL__FORCE_YCLKB);
		OUTPLL(pllMCLK_CNTL, tmp);
		radeon_msleep(15);

		tmp = INPLL(pllMCLK_MISC);
		tmp |= 	MCLK_MISC__MC_MCLK_MAX_DYN_STOP_LAT|
			MCLK_MISC__IO_MCLK_MAX_DYN_STOP_LAT|
			MCLK_MISC__MC_MCLK_DYN_ENABLE|
			MCLK_MISC__IO_MCLK_DYN_ENABLE;
		OUTPLL(pllMCLK_MISC, tmp);
		radeon_msleep(15);
	}
#endif /* CONFIG_PPC_OF */
}

#ifdef CONFIG_PM

static void OUTMC( struct radeonfb_info *rinfo, u8 indx, u32 value)
{
	OUTREG( MC_IND_INDEX, indx | MC_IND_INDEX__MC_IND_WR_EN);	
	OUTREG( MC_IND_DATA, value);		
}

static u32 INMC(struct radeonfb_info *rinfo, u8 indx)
{
	OUTREG( MC_IND_INDEX, indx);					
	return INREG( MC_IND_DATA);
}

static void radeon_pm_save_regs(struct radeonfb_info *rinfo, int saving_for_d3)
{
	rinfo->save_regs[0] = INPLL(PLL_PWRMGT_CNTL);
	rinfo->save_regs[1] = INPLL(CLK_PWRMGT_CNTL);
	rinfo->save_regs[2] = INPLL(MCLK_CNTL);
	rinfo->save_regs[3] = INPLL(SCLK_CNTL);
	rinfo->save_regs[4] = INPLL(CLK_PIN_CNTL);
	rinfo->save_regs[5] = INPLL(VCLK_ECP_CNTL);
	rinfo->save_regs[6] = INPLL(PIXCLKS_CNTL);
	rinfo->save_regs[7] = INPLL(MCLK_MISC);
	rinfo->save_regs[8] = INPLL(P2PLL_CNTL);
	
	rinfo->save_regs[9] = INREG(DISP_MISC_CNTL);
	rinfo->save_regs[10] = INREG(DISP_PWR_MAN);
	rinfo->save_regs[11] = INREG(LVDS_GEN_CNTL);
	rinfo->save_regs[13] = INREG(TV_DAC_CNTL);
	rinfo->save_regs[14] = INREG(BUS_CNTL1);
	rinfo->save_regs[15] = INREG(CRTC_OFFSET_CNTL);
	rinfo->save_regs[16] = INREG(AGP_CNTL);
	rinfo->save_regs[17] = (INREG(CRTC_GEN_CNTL) & 0xfdffffff) | 0x04000000;
	rinfo->save_regs[18] = (INREG(CRTC2_GEN_CNTL) & 0xfdffffff) | 0x04000000;
	rinfo->save_regs[19] = INREG(GPIOPAD_A);
	rinfo->save_regs[20] = INREG(GPIOPAD_EN);
	rinfo->save_regs[21] = INREG(GPIOPAD_MASK);
	rinfo->save_regs[22] = INREG(ZV_LCDPAD_A);
	rinfo->save_regs[23] = INREG(ZV_LCDPAD_EN);
	rinfo->save_regs[24] = INREG(ZV_LCDPAD_MASK);
	rinfo->save_regs[25] = INREG(GPIO_VGA_DDC);
	rinfo->save_regs[26] = INREG(GPIO_DVI_DDC);
	rinfo->save_regs[27] = INREG(GPIO_MONID);
	rinfo->save_regs[28] = INREG(GPIO_CRT2_DDC);

	rinfo->save_regs[29] = INREG(SURFACE_CNTL);
	rinfo->save_regs[30] = INREG(MC_FB_LOCATION);
	rinfo->save_regs[31] = INREG(DISPLAY_BASE_ADDR);
	rinfo->save_regs[32] = INREG(MC_AGP_LOCATION);
	rinfo->save_regs[33] = INREG(CRTC2_DISPLAY_BASE_ADDR);

	rinfo->save_regs[34] = INPLL(SCLK_MORE_CNTL);
	rinfo->save_regs[35] = INREG(MEM_SDRAM_MODE_REG);
	rinfo->save_regs[36] = INREG(BUS_CNTL);
	rinfo->save_regs[39] = INREG(RBBM_CNTL);
	rinfo->save_regs[40] = INREG(DAC_CNTL);
	rinfo->save_regs[41] = INREG(HOST_PATH_CNTL);
	rinfo->save_regs[37] = INREG(MPP_TB_CONFIG);
	rinfo->save_regs[38] = INREG(FCP_CNTL);

	if (rinfo->is_mobility) {
		rinfo->save_regs[12] = INREG(LVDS_PLL_CNTL);
		rinfo->save_regs[43] = INPLL(pllSSPLL_CNTL);
		rinfo->save_regs[44] = INPLL(pllSSPLL_REF_DIV);
		rinfo->save_regs[45] = INPLL(pllSSPLL_DIV_0);
		rinfo->save_regs[90] = INPLL(pllSS_INT_CNTL);
		rinfo->save_regs[91] = INPLL(pllSS_TST_CNTL);
		rinfo->save_regs[81] = INREG(LVDS_GEN_CNTL);
	}

	if (rinfo->family >= CHIP_FAMILY_RV200) {
		rinfo->save_regs[42] = INREG(MEM_REFRESH_CNTL);
		rinfo->save_regs[46] = INREG(MC_CNTL);
		rinfo->save_regs[47] = INREG(MC_INIT_GFX_LAT_TIMER);
		rinfo->save_regs[48] = INREG(MC_INIT_MISC_LAT_TIMER);
		rinfo->save_regs[49] = INREG(MC_TIMING_CNTL);
		rinfo->save_regs[50] = INREG(MC_READ_CNTL_AB);
		rinfo->save_regs[51] = INREG(MC_IOPAD_CNTL);
		rinfo->save_regs[52] = INREG(MC_CHIP_IO_OE_CNTL_AB);
		rinfo->save_regs[53] = INREG(MC_DEBUG);
	}
	rinfo->save_regs[54] = INREG(PAMAC0_DLY_CNTL);
	rinfo->save_regs[55] = INREG(PAMAC1_DLY_CNTL);
	rinfo->save_regs[56] = INREG(PAD_CTLR_MISC);
	rinfo->save_regs[57] = INREG(FW_CNTL);

	if (rinfo->family >= CHIP_FAMILY_R300) {
		rinfo->save_regs[58] = INMC(rinfo, ixR300_MC_MC_INIT_WR_LAT_TIMER);
		rinfo->save_regs[59] = INMC(rinfo, ixR300_MC_IMP_CNTL);
		rinfo->save_regs[60] = INMC(rinfo, ixR300_MC_CHP_IO_CNTL_C0);
		rinfo->save_regs[61] = INMC(rinfo, ixR300_MC_CHP_IO_CNTL_C1);
		rinfo->save_regs[62] = INMC(rinfo, ixR300_MC_CHP_IO_CNTL_D0);
		rinfo->save_regs[63] = INMC(rinfo, ixR300_MC_CHP_IO_CNTL_D1);
		rinfo->save_regs[64] = INMC(rinfo, ixR300_MC_BIST_CNTL_3);
		rinfo->save_regs[65] = INMC(rinfo, ixR300_MC_CHP_IO_CNTL_A0);
		rinfo->save_regs[66] = INMC(rinfo, ixR300_MC_CHP_IO_CNTL_A1);
		rinfo->save_regs[67] = INMC(rinfo, ixR300_MC_CHP_IO_CNTL_B0);
		rinfo->save_regs[68] = INMC(rinfo, ixR300_MC_CHP_IO_CNTL_B1);
		rinfo->save_regs[69] = INMC(rinfo, ixR300_MC_DEBUG_CNTL);
		rinfo->save_regs[70] = INMC(rinfo, ixR300_MC_DLL_CNTL);
		rinfo->save_regs[71] = INMC(rinfo, ixR300_MC_IMP_CNTL_0);
		rinfo->save_regs[72] = INMC(rinfo, ixR300_MC_ELPIDA_CNTL);
		rinfo->save_regs[96] = INMC(rinfo, ixR300_MC_READ_CNTL_CD);
	} else {
		rinfo->save_regs[59] = INMC(rinfo, ixMC_IMP_CNTL);
		rinfo->save_regs[65] = INMC(rinfo, ixMC_CHP_IO_CNTL_A0);
		rinfo->save_regs[66] = INMC(rinfo, ixMC_CHP_IO_CNTL_A1);
		rinfo->save_regs[67] = INMC(rinfo, ixMC_CHP_IO_CNTL_B0);
		rinfo->save_regs[68] = INMC(rinfo, ixMC_CHP_IO_CNTL_B1);
		rinfo->save_regs[71] = INMC(rinfo, ixMC_IMP_CNTL_0);
	}

	rinfo->save_regs[73] = INPLL(pllMPLL_CNTL);
	rinfo->save_regs[74] = INPLL(pllSPLL_CNTL);
	rinfo->save_regs[75] = INPLL(pllMPLL_AUX_CNTL);
	rinfo->save_regs[76] = INPLL(pllSPLL_AUX_CNTL);
	rinfo->save_regs[77] = INPLL(pllM_SPLL_REF_FB_DIV);
	rinfo->save_regs[78] = INPLL(pllAGP_PLL_CNTL);
	rinfo->save_regs[79] = INREG(PAMAC2_DLY_CNTL);

	rinfo->save_regs[80] = INREG(OV0_BASE_ADDR);
	rinfo->save_regs[82] = INREG(FP_GEN_CNTL);
	rinfo->save_regs[83] = INREG(FP2_GEN_CNTL);
	rinfo->save_regs[84] = INREG(TMDS_CNTL);
	rinfo->save_regs[85] = INREG(TMDS_TRANSMITTER_CNTL);
	rinfo->save_regs[86] = INREG(DISP_OUTPUT_CNTL);
	rinfo->save_regs[87] = INREG(DISP_HW_DEBUG);
	rinfo->save_regs[88] = INREG(TV_MASTER_CNTL);
	rinfo->save_regs[89] = INPLL(pllP2PLL_REF_DIV);
	rinfo->save_regs[92] = INPLL(pllPPLL_DIV_0);
	rinfo->save_regs[93] = INPLL(pllPPLL_CNTL);
	rinfo->save_regs[94] = INREG(GRPH_BUFFER_CNTL);
	rinfo->save_regs[95] = INREG(GRPH2_BUFFER_CNTL);
	rinfo->save_regs[96] = INREG(HDP_DEBUG);
	rinfo->save_regs[97] = INPLL(pllMDLL_CKO);
	rinfo->save_regs[98] = INPLL(pllMDLL_RDCKA);
	rinfo->save_regs[99] = INPLL(pllMDLL_RDCKB);
}

static void radeon_pm_restore_regs(struct radeonfb_info *rinfo)
{
	OUTPLL(P2PLL_CNTL, rinfo->save_regs[8] & 0xFFFFFFFE); /* First */
	
	OUTPLL(PLL_PWRMGT_CNTL, rinfo->save_regs[0]);
	OUTPLL(CLK_PWRMGT_CNTL, rinfo->save_regs[1]);
	OUTPLL(MCLK_CNTL, rinfo->save_regs[2]);
	OUTPLL(SCLK_CNTL, rinfo->save_regs[3]);
	OUTPLL(CLK_PIN_CNTL, rinfo->save_regs[4]);
	OUTPLL(VCLK_ECP_CNTL, rinfo->save_regs[5]);
	OUTPLL(PIXCLKS_CNTL, rinfo->save_regs[6]);
	OUTPLL(MCLK_MISC, rinfo->save_regs[7]);
	if (rinfo->family == CHIP_FAMILY_RV350)
		OUTPLL(SCLK_MORE_CNTL, rinfo->save_regs[34]);

	OUTREG(SURFACE_CNTL, rinfo->save_regs[29]);
	OUTREG(MC_FB_LOCATION, rinfo->save_regs[30]);
	OUTREG(DISPLAY_BASE_ADDR, rinfo->save_regs[31]);
	OUTREG(MC_AGP_LOCATION, rinfo->save_regs[32]);
	OUTREG(CRTC2_DISPLAY_BASE_ADDR, rinfo->save_regs[33]);
	OUTREG(CNFG_MEMSIZE, rinfo->video_ram);

	OUTREG(DISP_MISC_CNTL, rinfo->save_regs[9]);
	OUTREG(DISP_PWR_MAN, rinfo->save_regs[10]);
	OUTREG(LVDS_GEN_CNTL, rinfo->save_regs[11]);
	OUTREG(LVDS_PLL_CNTL,rinfo->save_regs[12]);
	OUTREG(TV_DAC_CNTL, rinfo->save_regs[13]);
	OUTREG(BUS_CNTL1, rinfo->save_regs[14]);
	OUTREG(CRTC_OFFSET_CNTL, rinfo->save_regs[15]);
	OUTREG(AGP_CNTL, rinfo->save_regs[16]);
	OUTREG(CRTC_GEN_CNTL, rinfo->save_regs[17]);
	OUTREG(CRTC2_GEN_CNTL, rinfo->save_regs[18]);
	OUTPLL(P2PLL_CNTL, rinfo->save_regs[8]);

	OUTREG(GPIOPAD_A, rinfo->save_regs[19]);
	OUTREG(GPIOPAD_EN, rinfo->save_regs[20]);
	OUTREG(GPIOPAD_MASK, rinfo->save_regs[21]);
	OUTREG(ZV_LCDPAD_A, rinfo->save_regs[22]);
	OUTREG(ZV_LCDPAD_EN, rinfo->save_regs[23]);
	OUTREG(ZV_LCDPAD_MASK, rinfo->save_regs[24]);
	OUTREG(GPIO_VGA_DDC, rinfo->save_regs[25]);
	OUTREG(GPIO_DVI_DDC, rinfo->save_regs[26]);
	OUTREG(GPIO_MONID, rinfo->save_regs[27]);
	OUTREG(GPIO_CRT2_DDC, rinfo->save_regs[28]);
}

static void radeon_pm_disable_iopad(struct radeonfb_info *rinfo)
{		
	OUTREG(GPIOPAD_MASK, 0x0001ffff);
	OUTREG(GPIOPAD_EN, 0x00000400);
	OUTREG(GPIOPAD_A, 0x00000000);		
        OUTREG(ZV_LCDPAD_MASK, 0x00000000);
        OUTREG(ZV_LCDPAD_EN, 0x00000000);
      	OUTREG(ZV_LCDPAD_A, 0x00000000); 	
	OUTREG(GPIO_VGA_DDC, 0x00030000);
	OUTREG(GPIO_DVI_DDC, 0x00000000);
	OUTREG(GPIO_MONID, 0x00030000);
	OUTREG(GPIO_CRT2_DDC, 0x00000000);
}

static void radeon_pm_program_v2clk(struct radeonfb_info *rinfo)
{
	/* Set v2clk to 65MHz */
	if (rinfo->family <= CHIP_FAMILY_RV280) {
		OUTPLL(pllPIXCLKS_CNTL,
			 __INPLL(rinfo, pllPIXCLKS_CNTL)
			 & ~PIXCLKS_CNTL__PIX2CLK_SRC_SEL_MASK);
	 
		OUTPLL(pllP2PLL_REF_DIV, 0x0000000c);
		OUTPLL(pllP2PLL_CNTL, 0x0000bf00);
	} else {
		OUTPLL(pllP2PLL_REF_DIV, 0x0000000c);
		INPLL(pllP2PLL_REF_DIV);
		OUTPLL(pllP2PLL_CNTL, 0x0000a700);
	}

	OUTPLL(pllP2PLL_DIV_0, 0x00020074 | P2PLL_DIV_0__P2PLL_ATOMIC_UPDATE_W);
	
	OUTPLL(pllP2PLL_CNTL, INPLL(pllP2PLL_CNTL) & ~P2PLL_CNTL__P2PLL_SLEEP);
	mdelay(1);

	OUTPLL(pllP2PLL_CNTL, INPLL(pllP2PLL_CNTL) & ~P2PLL_CNTL__P2PLL_RESET);
	mdelay( 1);

  	OUTPLL(pllPIXCLKS_CNTL,
  		(INPLL(pllPIXCLKS_CNTL) & ~PIXCLKS_CNTL__PIX2CLK_SRC_SEL_MASK)
  		| (0x03 << PIXCLKS_CNTL__PIX2CLK_SRC_SEL__SHIFT));
	mdelay( 1);	
}

static void radeon_pm_low_current(struct radeonfb_info *rinfo)
{
	u32 reg;

	reg  = INREG(BUS_CNTL1);
	if (rinfo->family <= CHIP_FAMILY_RV280) {
		reg &= ~BUS_CNTL1_MOBILE_PLATFORM_SEL_MASK;
		reg |= BUS_CNTL1_AGPCLK_VALID | (1<<BUS_CNTL1_MOBILE_PLATFORM_SEL_SHIFT);
	} else {
		reg |= 0x4080;
	}
	OUTREG(BUS_CNTL1, reg);
	
	reg  = INPLL(PLL_PWRMGT_CNTL);
	reg |= PLL_PWRMGT_CNTL_SPLL_TURNOFF | PLL_PWRMGT_CNTL_PPLL_TURNOFF |
		PLL_PWRMGT_CNTL_P2PLL_TURNOFF | PLL_PWRMGT_CNTL_TVPLL_TURNOFF;
	reg &= ~PLL_PWRMGT_CNTL_SU_MCLK_USE_BCLK;
	reg &= ~PLL_PWRMGT_CNTL_MOBILE_SU;
	OUTPLL(PLL_PWRMGT_CNTL, reg);
	
	reg  = INREG(TV_DAC_CNTL);
	reg &= ~(TV_DAC_CNTL_BGADJ_MASK |TV_DAC_CNTL_DACADJ_MASK);
	reg |=TV_DAC_CNTL_BGSLEEP | TV_DAC_CNTL_RDACPD | TV_DAC_CNTL_GDACPD |
		TV_DAC_CNTL_BDACPD |
		(8<<TV_DAC_CNTL_BGADJ__SHIFT) | (8<<TV_DAC_CNTL_DACADJ__SHIFT);
	OUTREG(TV_DAC_CNTL, reg);
	
	reg  = INREG(TMDS_TRANSMITTER_CNTL);
	reg &= ~(TMDS_PLL_EN | TMDS_PLLRST);
	OUTREG(TMDS_TRANSMITTER_CNTL, reg);

	reg = INREG(DAC_CNTL);
	reg &= ~DAC_CMP_EN;
	OUTREG(DAC_CNTL, reg);

	reg = INREG(DAC_CNTL2);
	reg &= ~DAC2_CMP_EN;
	OUTREG(DAC_CNTL2, reg);
	
	reg  = INREG(TV_DAC_CNTL);
	reg &= ~TV_DAC_CNTL_DETECT;
	OUTREG(TV_DAC_CNTL, reg);
}

static void radeon_pm_setup_for_suspend(struct radeonfb_info *rinfo)
{

	u32 sclk_cntl, mclk_cntl, sclk_more_cntl;

	u32 pll_pwrmgt_cntl;
	u32 clk_pwrmgt_cntl;
	u32 clk_pin_cntl;
	u32 vclk_ecp_cntl; 
	u32 pixclks_cntl;
	u32 disp_mis_cntl;
	u32 disp_pwr_man;
	u32 tmp;