[linux-2.6-block.git] / drivers / gpu / drm / i915 / i915_suspend.c

/*
 *
 * Copyright 2008 (c) Intel Corporation
 *   Jesse Barnes <jbarnes@virtuousgeek.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include "drmP.h"
#include "drm.h"
#include "i915_drm.h"
#include "i915_drv.h"

static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	if (pipe == PIPE_A)
		return (I915_READ(DPLL_A) & DPLL_VCO_ENABLE);
	else
		return (I915_READ(DPLL_B) & DPLL_VCO_ENABLE);
}

static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
	u32 *array;
	int i;

	if (!i915_pipe_enabled(dev, pipe))
		return;

	if (pipe == PIPE_A)
		array = dev_priv->save_palette_a;
	else
		array = dev_priv->save_palette_b;

	for(i = 0; i < 256; i++)
		array[i] = I915_READ(reg + (i << 2));
}

static void i915_restore_palette(struct drm_device *dev, enum pipe pipe)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
	u32 *array;
	int i;

	if (!i915_pipe_enabled(dev, pipe))
		return;

	if (pipe == PIPE_A)
		array = dev_priv->save_palette_a;
	else
		array = dev_priv->save_palette_b;

	for(i = 0; i < 256; i++)
		I915_WRITE(reg + (i << 2), array[i]);
}

static u8 i915_read_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	I915_WRITE8(index_port, reg);
	return I915_READ8(data_port);
}

static u8 i915_read_ar(struct drm_device *dev, u16 st01, u8 reg, u16 palette_enable)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	I915_READ8(st01);
	I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
	return I915_READ8(VGA_AR_DATA_READ);
}

static void i915_write_ar(struct drm_device *dev, u16 st01, u8 reg, u8 val, u16 palette_enable)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	I915_READ8(st01);
	I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
	I915_WRITE8(VGA_AR_DATA_WRITE, val);
}

static void i915_write_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg, u8 val)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	I915_WRITE8(index_port, reg);
	I915_WRITE8(data_port, val);
}

static void i915_save_vga(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;
	u16 cr_index, cr_data, st01;

	/* VGA color palette registers */
	dev_priv->saveDACMASK = I915_READ8(VGA_DACMASK);
	/* DACCRX automatically increments during read */
	I915_WRITE8(VGA_DACRX, 0);
	/* Read 3 bytes of color data from each index */
	for (i = 0; i < 256 * 3; i++)
		dev_priv->saveDACDATA[i] = I915_READ8(VGA_DACDATA);

	/* MSR bits */
	dev_priv->saveMSR = I915_READ8(VGA_MSR_READ);
	if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
		cr_index = VGA_CR_INDEX_CGA;
		cr_data = VGA_CR_DATA_CGA;
		st01 = VGA_ST01_CGA;
	} else {
		cr_index = VGA_CR_INDEX_MDA;
		cr_data = VGA_CR_DATA_MDA;
		st01 = VGA_ST01_MDA;
	}

	/* CRT controller regs */
	i915_write_indexed(dev, cr_index, cr_data, 0x11,
			   i915_read_indexed(dev, cr_index, cr_data, 0x11) &
			   (~0x80));
	for (i = 0; i <= 0x24; i++)
		dev_priv->saveCR[i] =
			i915_read_indexed(dev, cr_index, cr_data, i);
	/* Make sure we don't turn off CR group 0 writes */
	dev_priv->saveCR[0x11] &= ~0x80;

	/* Attribute controller registers */
	I915_READ8(st01);
	dev_priv->saveAR_INDEX = I915_READ8(VGA_AR_INDEX);
	for (i = 0; i <= 0x14; i++)
		dev_priv->saveAR[i] = i915_read_ar(dev, st01, i, 0);
	I915_READ8(st01);
	I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX);
	I915_READ8(st01);

	/* Graphics controller registers */
	for (i = 0; i < 9; i++)
		dev_priv->saveGR[i] =
			i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i);

	dev_priv->saveGR[0x10] =
		i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10);
	dev_priv->saveGR[0x11] =
		i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11);
	dev_priv->saveGR[0x18] =
		i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18);

	/* Sequencer registers */
	for (i = 0; i < 8; i++)
		dev_priv->saveSR[i] =
			i915_read_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i);
}

static void i915_restore_vga(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;
	u16 cr_index, cr_data, st01;

	/* MSR bits */
	I915_WRITE8(VGA_MSR_WRITE, dev_priv->saveMSR);
	if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
		cr_index = VGA_CR_INDEX_CGA;
		cr_data = VGA_CR_DATA_CGA;
		st01 = VGA_ST01_CGA;
	} else {
		cr_index = VGA_CR_INDEX_MDA;
		cr_data = VGA_CR_DATA_MDA;
		st01 = VGA_ST01_MDA;
	}

	/* Sequencer registers, don't write SR07 */
	for (i = 0; i < 7; i++)
		i915_write_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i,
				   dev_priv->saveSR[i]);

	/* CRT controller regs */
	/* Enable CR group 0 writes */
	i915_write_indexed(dev, cr_index, cr_data, 0x11, dev_priv->saveCR[0x11]);
	for (i = 0; i <= 0x24; i++)
		i915_write_indexed(dev, cr_index, cr_data, i, dev_priv->saveCR[i]);

	/* Graphics controller regs */
	for (i = 0; i < 9; i++)
		i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i,
				   dev_priv->saveGR[i]);

	i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10,
			   dev_priv->saveGR[0x10]);
	i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11,
			   dev_priv->saveGR[0x11]);
	i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18,
			   dev_priv->saveGR[0x18]);

	/* Attribute controller registers */
	I915_READ8(st01); /* switch back to index mode */
	for (i = 0; i <= 0x14; i++)
		i915_write_ar(dev, st01, i, dev_priv->saveAR[i], 0);
	I915_READ8(st01); /* switch back to index mode */
	I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX | 0x20);
	I915_READ8(st01);

	/* VGA color palette registers */
	I915_WRITE8(VGA_DACMASK, dev_priv->saveDACMASK);
	/* DACCRX automatically increments during read */
	I915_WRITE8(VGA_DACWX, 0);
	/* Read 3 bytes of color data from each index */
	for (i = 0; i < 256 * 3; i++)
		I915_WRITE8(VGA_DACDATA, dev_priv->saveDACDATA[i]);

}

int i915_save_state(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;

	pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);

	/* Render Standby */
	if (IS_I965G(dev) && IS_MOBILE(dev))
		dev_priv->saveRENDERSTANDBY = I915_READ(MCHBAR_RENDER_STANDBY);

	/* Hardware status page */
	dev_priv->saveHWS = I915_READ(HWS_PGA);

	/* Display arbitration control */
	dev_priv->saveDSPARB = I915_READ(DSPARB);

	/* Pipe & plane A info */
	dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
	dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
	dev_priv->saveFPA0 = I915_READ(FPA0);
	dev_priv->saveFPA1 = I915_READ(FPA1);
	dev_priv->saveDPLL_A = I915_READ(DPLL_A);
	if (IS_I965G(dev))
		dev_priv->saveDPLL_A_MD = I915_READ(DPLL_A_MD);
	dev_priv->saveHTOTAL_A = I915_READ(HTOTAL_A);
	dev_priv->saveHBLANK_A = I915_READ(HBLANK_A);
	dev_priv->saveHSYNC_A = I915_READ(HSYNC_A);
	dev_priv->saveVTOTAL_A = I915_READ(VTOTAL_A);
	dev_priv->saveVBLANK_A = I915_READ(VBLANK_A);
	dev_priv->saveVSYNC_A = I915_READ(VSYNC_A);
	dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);

	dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
	dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
	dev_priv->saveDSPASIZE = I915_READ(DSPASIZE);
	dev_priv->saveDSPAPOS = I915_READ(DSPAPOS);
	dev_priv->saveDSPAADDR = I915_READ(DSPAADDR);
	if (IS_I965G(dev)) {
		dev_priv->saveDSPASURF = I915_READ(DSPASURF);
		dev_priv->saveDSPATILEOFF = I915_READ(DSPATILEOFF);
	}
	i915_save_palette(dev, PIPE_A);
	dev_priv->savePIPEASTAT = I915_READ(PIPEASTAT);

	/* Pipe & plane B info */
	dev_priv->savePIPEBCONF = I915_READ(PIPEBCONF);
	dev_priv->savePIPEBSRC = I915_READ(PIPEBSRC);
	dev_priv->saveFPB0 = I915_READ(FPB0);
	dev_priv->saveFPB1 = I915_READ(FPB1);
	dev_priv->saveDPLL_B = I915_READ(DPLL_B);
	if (IS_I965G(dev))
		dev_priv->saveDPLL_B_MD = I915_READ(DPLL_B_MD);
	dev_priv->saveHTOTAL_B = I915_READ(HTOTAL_B);
	dev_priv->saveHBLANK_B = I915_READ(HBLANK_B);
	dev_priv->saveHSYNC_B = I915_READ(HSYNC_B);
	dev_priv->saveVTOTAL_B = I915_READ(VTOTAL_B);
	dev_priv->saveVBLANK_B = I915_READ(VBLANK_B);
	dev_priv->saveVSYNC_B = I915_READ(VSYNC_B);
	dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);

	dev_priv->saveDSPBCNTR = I915_READ(DSPBCNTR);
	dev_priv->saveDSPBSTRIDE = I915_READ(DSPBSTRIDE);
	dev_priv->saveDSPBSIZE = I915_READ(DSPBSIZE);
	dev_priv->saveDSPBPOS = I915_READ(DSPBPOS);
	dev_priv->saveDSPBADDR = I915_READ(DSPBADDR);
	if (IS_I965GM(dev) || IS_GM45(dev)) {
		dev_priv->saveDSPBSURF = I915_READ(DSPBSURF);
		dev_priv->saveDSPBTILEOFF = I915_READ(DSPBTILEOFF);
	}
	i915_save_palette(dev, PIPE_B);
	dev_priv->savePIPEBSTAT = I915_READ(PIPEBSTAT);

	/* CRT state */
	dev_priv->saveADPA = I915_READ(ADPA);

	/* LVDS state */
	dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
	dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
	if (IS_I965G(dev))
		dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
	if (IS_MOBILE(dev) && !IS_I830(dev))
		dev_priv->saveLVDS = I915_READ(LVDS);
	if (!IS_I830(dev) && !IS_845G(dev))
		dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
	dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
	dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
	dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);

	/* FIXME: save TV & SDVO state */

	/* FBC state */
	dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
	dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
	dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
	dev_priv->saveFBC_CONTROL = I915_READ(FBC_CONTROL);

	/* Interrupt state */
	dev_priv->saveIIR = I915_READ(IIR);
	dev_priv->saveIER = I915_READ(IER);
	dev_priv->saveIMR = I915_READ(IMR);

	/* VGA state */
	dev_priv->saveVGA0 = I915_READ(VGA0);
	dev_priv->saveVGA1 = I915_READ(VGA1);
	dev_priv->saveVGA_PD = I915_READ(VGA_PD);
	dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);

	/* Clock gating state */
	dev_priv->saveD_STATE = I915_READ(D_STATE);
	dev_priv->saveCG_2D_DIS = I915_READ(CG_2D_DIS);

	/* Cache mode state */
	dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);

	/* Memory Arbitration state */
	dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);

	/* Scratch space */
	for (i = 0; i < 16; i++) {
		dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
		dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
	}
	for (i = 0; i < 3; i++)
		dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));

	i915_save_vga(dev);

	return 0;
}

int i915_restore_state(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	int i;

	pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);

	/* Render Standby */
	if (IS_I965G(dev) && IS_MOBILE(dev))
		I915_WRITE(MCHBAR_RENDER_STANDBY, dev_priv->saveRENDERSTANDBY);

	/* Hardware status page */
	I915_WRITE(HWS_PGA, dev_priv->saveHWS);

	/* Display arbitration */
	I915_WRITE(DSPARB, dev_priv->saveDSPARB);

	/* Pipe & plane A info */
	/* Prime the clock */
	if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
		I915_WRITE(DPLL_A, dev_priv->saveDPLL_A &
			   ~DPLL_VCO_ENABLE);
		DRM_UDELAY(150);
	}
	I915_WRITE(FPA0, dev_priv->saveFPA0);
	I915_WRITE(FPA1, dev_priv->saveFPA1);
	/* Actually enable it */
	I915_WRITE(DPLL_A, dev_priv->saveDPLL_A);
	DRM_UDELAY(150);
	if (IS_I965G(dev))
		I915_WRITE(DPLL_A_MD, dev_priv->saveDPLL_A_MD);
	DRM_UDELAY(150);

	/* Restore mode */
	I915_WRITE(HTOTAL_A, dev_priv->saveHTOTAL_A);
	I915_WRITE(HBLANK_A, dev_priv->saveHBLANK_A);
	I915_WRITE(HSYNC_A, dev_priv->saveHSYNC_A);
	I915_WRITE(VTOTAL_A, dev_priv->saveVTOTAL_A);
	I915_WRITE(VBLANK_A, dev_priv->saveVBLANK_A);
	I915_WRITE(VSYNC_A, dev_priv->saveVSYNC_A);
	I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);

	/* Restore plane info */
	I915_WRITE(DSPASIZE, dev_priv->saveDSPASIZE);
	I915_WRITE(DSPAPOS, dev_priv->saveDSPAPOS);
	I915_WRITE(PIPEASRC, dev_priv->savePIPEASRC);
	I915_WRITE(DSPAADDR, dev_priv->saveDSPAADDR);
	I915_WRITE(DSPASTRIDE, dev_priv->saveDSPASTRIDE);
	if (IS_I965G(dev)) {
		I915_WRITE(DSPASURF, dev_priv->saveDSPASURF);
		I915_WRITE(DSPATILEOFF, dev_priv->saveDSPATILEOFF);
	}

	I915_WRITE(PIPEACONF, dev_priv->savePIPEACONF);

	i915_restore_palette(dev, PIPE_A);
	/* Enable the plane */
	I915_WRITE(DSPACNTR, dev_priv->saveDSPACNTR);
	I915_WRITE(DSPAADDR, I915_READ(DSPAADDR));

	/* Pipe & plane B info */
	if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
		I915_WRITE(DPLL_B, dev_priv->saveDPLL_B &
			   ~DPLL_VCO_ENABLE);
		DRM_UDELAY(150);
	}
	I915_WRITE(FPB0, dev_priv->saveFPB0);
	I915_WRITE(FPB1, dev_priv->saveFPB1);
	/* Actually enable it */
	I915_WRITE(DPLL_B, dev_priv->saveDPLL_B);
	DRM_UDELAY(150);
	if (IS_I965G(dev))
		I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
	DRM_UDELAY(150);

	/* Restore mode */
	I915_WRITE(HTOTAL_B, dev_priv->saveHTOTAL_B);
	I915_WRITE(HBLANK_B, dev_priv->saveHBLANK_B);
	I915_WRITE(HSYNC_B, dev_priv->saveHSYNC_B);
	I915_WRITE(VTOTAL_B, dev_priv->saveVTOTAL_B);
	I915_WRITE(VBLANK_B, dev_priv->saveVBLANK_B);
	I915_WRITE(VSYNC_B, dev_priv->saveVSYNC_B);
	I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);

	/* Restore plane info */
	I915_WRITE(DSPBSIZE, dev_priv->saveDSPBSIZE);
	I915_WRITE(DSPBPOS, dev_priv->saveDSPBPOS);
	I915_WRITE(PIPEBSRC, dev_priv->savePIPEBSRC);
	I915_WRITE(DSPBADDR, dev_priv->saveDSPBADDR);
	I915_WRITE(DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
	if (IS_I965G(dev)) {
		I915_WRITE(DSPBSURF, dev_priv->saveDSPBSURF);
		I915_WRITE(DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
	}

	I915_WRITE(PIPEBCONF, dev_priv->savePIPEBCONF);

	i915_restore_palette(dev, PIPE_B);
	/* Enable the plane */
	I915_WRITE(DSPBCNTR, dev_priv->saveDSPBCNTR);
	I915_WRITE(DSPBADDR, I915_READ(DSPBADDR));

	/* CRT state */
	I915_WRITE(ADPA, dev_priv->saveADPA);

	/* LVDS state */
	if (IS_I965G(dev))
		I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
	if (IS_MOBILE(dev) && !IS_I830(dev))
		I915_WRITE(LVDS, dev_priv->saveLVDS);
	if (!IS_I830(dev) && !IS_845G(dev))
		I915_WRITE(PFIT_CONTROL, dev_priv->savePFIT_CONTROL);

	I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
	I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
	I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
	I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
	I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
	I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);

	/* FIXME: restore TV & SDVO state */

	/* FBC info */
	I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
	I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
	I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
	I915_WRITE(FBC_CONTROL, dev_priv->saveFBC_CONTROL);

	/* VGA state */
	I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
	I915_WRITE(VGA0, dev_priv->saveVGA0);
	I915_WRITE(VGA1, dev_priv->saveVGA1);
	I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
	DRM_UDELAY(150);

	/* Clock gating state */
	I915_WRITE (D_STATE, dev_priv->saveD_STATE);
	I915_WRITE (CG_2D_DIS, dev_priv->saveCG_2D_DIS);

	/* Cache mode state */
	I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);

	/* Memory arbitration state */
	I915_WRITE (MI_ARB_STATE, dev_priv->saveMI_ARB_STATE | 0xffff0000);

	for (i = 0; i < 16; i++) {
		I915_WRITE(SWF00 + (i << 2), dev_priv->saveSWF0[i]);
		I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i+7]);
	}
	for (i = 0; i < 3; i++)
		I915_WRITE(SWF30 + (i << 2), dev_priv->saveSWF2[i]);

	i915_restore_vga(dev);

	return 0;
}
Commit	Line	Data
317c35d1 JB	1	/*
	2	*
	3	* Copyright 2008 (c) Intel Corporation
	4	* Jesse Barnes <jbarnes@virtuousgeek.org>
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the
	8	* "Software"), to deal in the Software without restriction, including
	9	* without limitation the rights to use, copy, modify, merge, publish,
	10	* distribute, sub license, and/or sell copies of the Software, and to
	11	* permit persons to whom the Software is furnished to do so, subject to
	12	* the following conditions:
	13	*
	14	* The above copyright notice and this permission notice (including the
	15	* next paragraph) shall be included in all copies or substantial portions
	16	* of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	19	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	20	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
	21	* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
	22	* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	23	* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	24	* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	25	*/
	26
	27	#include "drmP.h"
	28	#include "drm.h"
	29	#include "i915_drm.h"
	30	#include "i915_drv.h"
	31
	32	static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
	33	{
	34	struct drm_i915_private *dev_priv = dev->dev_private;
	35
	36	if (pipe == PIPE_A)
	37	return (I915_READ(DPLL_A) & DPLL_VCO_ENABLE);
	38	else
	39	return (I915_READ(DPLL_B) & DPLL_VCO_ENABLE);
	40	}
	41
	42	static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
	43	{
	44	struct drm_i915_private *dev_priv = dev->dev_private;
	45	unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
	46	u32 *array;
	47	int i;
	48
	49	if (!i915_pipe_enabled(dev, pipe))
	50	return;
	51
	52	if (pipe == PIPE_A)
	53	array = dev_priv->save_palette_a;
	54	else
	55	array = dev_priv->save_palette_b;
	56
	57	for(i = 0; i < 256; i++)
	58	array[i] = I915_READ(reg + (i << 2));
	59	}
	60
	61	static void i915_restore_palette(struct drm_device *dev, enum pipe pipe)
	62	{
	63	struct drm_i915_private *dev_priv = dev->dev_private;
	64	unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
65	u32 *array;
66	int i;
67
68	if (!i915_pipe_enabled(dev, pipe))
69	return;
70
71	if (pipe == PIPE_A)
72	array = dev_priv->save_palette_a;
73	else
74	array = dev_priv->save_palette_b;
75
76	for(i = 0; i < 256; i++)
77	I915_WRITE(reg + (i << 2), array[i]);
78	}
79
80	static u8 i915_read_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg)
81	{
82	struct drm_i915_private *dev_priv = dev->dev_private;
83
84	I915_WRITE8(index_port, reg);
85	return I915_READ8(data_port);
86	}
87
88	static u8 i915_read_ar(struct drm_device *dev, u16 st01, u8 reg, u16 palette_enable)
89	{
90	struct drm_i915_private *dev_priv = dev->dev_private;
91
92	I915_READ8(st01);
93	I915_WRITE8(VGA_AR_INDEX, palette_enable \| reg);
94	return I915_READ8(VGA_AR_DATA_READ);
95	}
96
97	static void i915_write_ar(struct drm_device *dev, u16 st01, u8 reg, u8 val, u16 palette_enable)
98	{
99	struct drm_i915_private *dev_priv = dev->dev_private;
100
101	I915_READ8(st01);
102	I915_WRITE8(VGA_AR_INDEX, palette_enable \| reg);
103	I915_WRITE8(VGA_AR_DATA_WRITE, val);
104	}
105
106	static void i915_write_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg, u8 val)
107	{
108	struct drm_i915_private *dev_priv = dev->dev_private;
109
110	I915_WRITE8(index_port, reg);
111	I915_WRITE8(data_port, val);
112	}
113
114	static void i915_save_vga(struct drm_device *dev)
115	{
116	struct drm_i915_private *dev_priv = dev->dev_private;
117	int i;
118	u16 cr_index, cr_data, st01;
119
120	/* VGA color palette registers */
121	dev_priv->saveDACMASK = I915_READ8(VGA_DACMASK);
122	/* DACCRX automatically increments during read */
123	I915_WRITE8(VGA_DACRX, 0);
124	/* Read 3 bytes of color data from each index */
125	for (i = 0; i < 256 * 3; i++)
126	dev_priv->saveDACDATA[i] = I915_READ8(VGA_DACDATA);
127
128	/* MSR bits */
129	dev_priv->saveMSR = I915_READ8(VGA_MSR_READ);
130	if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
131	cr_index = VGA_CR_INDEX_CGA;
132	cr_data = VGA_CR_DATA_CGA;
133	st01 = VGA_ST01_CGA;
134	} else {
135	cr_index = VGA_CR_INDEX_MDA;
136	cr_data = VGA_CR_DATA_MDA;
137	st01 = VGA_ST01_MDA;
138	}
139
140	/* CRT controller regs */
141	i915_write_indexed(dev, cr_index, cr_data, 0x11,
142	i915_read_indexed(dev, cr_index, cr_data, 0x11) &
143	(~0x80));
144	for (i = 0; i <= 0x24; i++)
145	dev_priv->saveCR[i] =
146	i915_read_indexed(dev, cr_index, cr_data, i);
147	/* Make sure we don't turn off CR group 0 writes */
148	dev_priv->saveCR[0x11] &= ~0x80;
149
150	/* Attribute controller registers */
151	I915_READ8(st01);
152	dev_priv->saveAR_INDEX = I915_READ8(VGA_AR_INDEX);
153	for (i = 0; i <= 0x14; i++)
154	dev_priv->saveAR[i] = i915_read_ar(dev, st01, i, 0);
155	I915_READ8(st01);
156	I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX);
157	I915_READ8(st01);
158
159	/* Graphics controller registers */
160	for (i = 0; i < 9; i++)
161	dev_priv->saveGR[i] =
162	i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i);
163
164	dev_priv->saveGR[0x10] =
165	i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10);
166	dev_priv->saveGR[0x11] =
167	i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11);
168	dev_priv->saveGR[0x18] =
169	i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18);
170
171	/* Sequencer registers */
172	for (i = 0; i < 8; i++)
173	dev_priv->saveSR[i] =
174	i915_read_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i);
175	}
176
177	static void i915_restore_vga(struct drm_device *dev)
178	{
179	struct drm_i915_private *dev_priv = dev->dev_private;
180	int i;
181	u16 cr_index, cr_data, st01;
182
183	/* MSR bits */
184	I915_WRITE8(VGA_MSR_WRITE, dev_priv->saveMSR);
185	if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
186	cr_index = VGA_CR_INDEX_CGA;
187	cr_data = VGA_CR_DATA_CGA;
188	st01 = VGA_ST01_CGA;
189	} else {
190	cr_index = VGA_CR_INDEX_MDA;
191	cr_data = VGA_CR_DATA_MDA;
192	st01 = VGA_ST01_MDA;
193	}
194
195	/* Sequencer registers, don't write SR07 */
196	for (i = 0; i < 7; i++)
197	i915_write_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i,
198	dev_priv->saveSR[i]);
199
200	/* CRT controller regs */
201	/* Enable CR group 0 writes */
202	i915_write_indexed(dev, cr_index, cr_data, 0x11, dev_priv->saveCR[0x11]);
203	for (i = 0; i <= 0x24; i++)
204	i915_write_indexed(dev, cr_index, cr_data, i, dev_priv->saveCR[i]);
205
206	/* Graphics controller regs */
207	for (i = 0; i < 9; i++)
208	i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i,
209	dev_priv->saveGR[i]);
210
211	i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10,
212	dev_priv->saveGR[0x10]);
213	i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11,
214	dev_priv->saveGR[0x11]);
215	i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18,
216	dev_priv->saveGR[0x18]);
217
218	/* Attribute controller registers */
219	I915_READ8(st01); /* switch back to index mode */
220	for (i = 0; i <= 0x14; i++)
221	i915_write_ar(dev, st01, i, dev_priv->saveAR[i], 0);
222	I915_READ8(st01); /* switch back to index mode */
223	I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX \| 0x20);
224	I915_READ8(st01);
225
226	/* VGA color palette registers */
227	I915_WRITE8(VGA_DACMASK, dev_priv->saveDACMASK);
228	/* DACCRX automatically increments during read */
229	I915_WRITE8(VGA_DACWX, 0);
230	/* Read 3 bytes of color data from each index */
231	for (i = 0; i < 256 * 3; i++)
232	I915_WRITE8(VGA_DACDATA, dev_priv->saveDACDATA[i]);
233
234	}
235
236	int i915_save_state(struct drm_device *dev)
237	{
238	struct drm_i915_private *dev_priv = dev->dev_private;
239	int i;
240
241	pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
242
881ee988 KP	243	/* Render Standby */
	244	if (IS_I965G(dev) && IS_MOBILE(dev))
	245	dev_priv->saveRENDERSTANDBY = I915_READ(MCHBAR_RENDER_STANDBY);
	246
461cba2d PL	247	/* Hardware status page */
	248	dev_priv->saveHWS = I915_READ(HWS_PGA);
	249
317c35d1 JB	250	/* Display arbitration control */
	251	dev_priv->saveDSPARB = I915_READ(DSPARB);
	252
	253	/* Pipe & plane A info */
	254	dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
	255	dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
	256	dev_priv->saveFPA0 = I915_READ(FPA0);
	257	dev_priv->saveFPA1 = I915_READ(FPA1);
	258	dev_priv->saveDPLL_A = I915_READ(DPLL_A);
	259	if (IS_I965G(dev))
	260	dev_priv->saveDPLL_A_MD = I915_READ(DPLL_A_MD);
	261	dev_priv->saveHTOTAL_A = I915_READ(HTOTAL_A);
	262	dev_priv->saveHBLANK_A = I915_READ(HBLANK_A);
	263	dev_priv->saveHSYNC_A = I915_READ(HSYNC_A);
	264	dev_priv->saveVTOTAL_A = I915_READ(VTOTAL_A);
	265	dev_priv->saveVBLANK_A = I915_READ(VBLANK_A);
	266	dev_priv->saveVSYNC_A = I915_READ(VSYNC_A);
	267	dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
	268
	269	dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
	270	dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
	271	dev_priv->saveDSPASIZE = I915_READ(DSPASIZE);
	272	dev_priv->saveDSPAPOS = I915_READ(DSPAPOS);
	273	dev_priv->saveDSPAADDR = I915_READ(DSPAADDR);
	274	if (IS_I965G(dev)) {
	275	dev_priv->saveDSPASURF = I915_READ(DSPASURF);
	276	dev_priv->saveDSPATILEOFF = I915_READ(DSPATILEOFF);
	277	}
	278	i915_save_palette(dev, PIPE_A);
	279	dev_priv->savePIPEASTAT = I915_READ(PIPEASTAT);
	280
	281	/* Pipe & plane B info */
	282	dev_priv->savePIPEBCONF = I915_READ(PIPEBCONF);
	283	dev_priv->savePIPEBSRC = I915_READ(PIPEBSRC);
	284	dev_priv->saveFPB0 = I915_READ(FPB0);
	285	dev_priv->saveFPB1 = I915_READ(FPB1);
	286	dev_priv->saveDPLL_B = I915_READ(DPLL_B);
	287	if (IS_I965G(dev))
	288	dev_priv->saveDPLL_B_MD = I915_READ(DPLL_B_MD);
	289	dev_priv->saveHTOTAL_B = I915_READ(HTOTAL_B);
	290	dev_priv->saveHBLANK_B = I915_READ(HBLANK_B);
	291	dev_priv->saveHSYNC_B = I915_READ(HSYNC_B);
	292	dev_priv->saveVTOTAL_B = I915_READ(VTOTAL_B);
	293	dev_priv->saveVBLANK_B = I915_READ(VBLANK_B);
	294	dev_priv->saveVSYNC_B = I915_READ(VSYNC_B);
	295	dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
	296
	297	dev_priv->saveDSPBCNTR = I915_READ(DSPBCNTR);
	298	dev_priv->saveDSPBSTRIDE = I915_READ(DSPBSTRIDE);
	299	dev_priv->saveDSPBSIZE = I915_READ(DSPBSIZE);
	300	dev_priv->saveDSPBPOS = I915_READ(DSPBPOS);
	301	dev_priv->saveDSPBADDR = I915_READ(DSPBADDR);
b9bfdfe6	302	if (IS_I965GM(dev) \|\| IS_GM45(dev)) {
317c35d1 JB	303	dev_priv->saveDSPBSURF = I915_READ(DSPBSURF);
	304	dev_priv->saveDSPBTILEOFF = I915_READ(DSPBTILEOFF);
	305	}
	306	i915_save_palette(dev, PIPE_B);
	307	dev_priv->savePIPEBSTAT = I915_READ(PIPEBSTAT);
	308
	309	/* CRT state */
	310	dev_priv->saveADPA = I915_READ(ADPA);
	311
	312	/* LVDS state */
	313	dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
	314	dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
	315	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
	316	if (IS_I965G(dev))
	317	dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
	318	if (IS_MOBILE(dev) && !IS_I830(dev))
	319	dev_priv->saveLVDS = I915_READ(LVDS);
	320	if (!IS_I830(dev) && !IS_845G(dev))
	321	dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
	322	dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
	323	dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
	324	dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
	325
	326	/* FIXME: save TV & SDVO state */
	327
	328	/* FBC state */
	329	dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
	330	dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
	331	dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
	332	dev_priv->saveFBC_CONTROL = I915_READ(FBC_CONTROL);
	333
	334	/* Interrupt state */
	335	dev_priv->saveIIR = I915_READ(IIR);
	336	dev_priv->saveIER = I915_READ(IER);
	337	dev_priv->saveIMR = I915_READ(IMR);
	338
	339	/* VGA state */
	340	dev_priv->saveVGA0 = I915_READ(VGA0);
	341	dev_priv->saveVGA1 = I915_READ(VGA1);
	342	dev_priv->saveVGA_PD = I915_READ(VGA_PD);
	343	dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
	344
	345	/* Clock gating state */
	346	dev_priv->saveD_STATE = I915_READ(D_STATE);
	347	dev_priv->saveCG_2D_DIS = I915_READ(CG_2D_DIS);
	348
	349	/* Cache mode state */
	350	dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
	351
	352	/* Memory Arbitration state */
	353	dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
	354
	355	/* Scratch space */
	356	for (i = 0; i < 16; i++) {
	357	dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
	358	dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
	359	}
	360	for (i = 0; i < 3; i++)
	361	dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
	362
	363	i915_save_vga(dev);
	364
	365	return 0;
	366	}
367
368	int i915_restore_state(struct drm_device *dev)
369	{
370	struct drm_i915_private *dev_priv = dev->dev_private;
371	int i;
372
373	pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
374
881ee988 KP	375	/* Render Standby */
	376	if (IS_I965G(dev) && IS_MOBILE(dev))
	377	I915_WRITE(MCHBAR_RENDER_STANDBY, dev_priv->saveRENDERSTANDBY);
	378
461cba2d PL	379	/* Hardware status page */
	380	I915_WRITE(HWS_PGA, dev_priv->saveHWS);
	381
881ee988	382	/* Display arbitration */
317c35d1 JB	383	I915_WRITE(DSPARB, dev_priv->saveDSPARB);
	384
	385	/* Pipe & plane A info */
	386	/* Prime the clock */
	387	if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
	388	I915_WRITE(DPLL_A, dev_priv->saveDPLL_A &
	389	~DPLL_VCO_ENABLE);
	390	DRM_UDELAY(150);
	391	}
	392	I915_WRITE(FPA0, dev_priv->saveFPA0);
	393	I915_WRITE(FPA1, dev_priv->saveFPA1);
	394	/* Actually enable it */
	395	I915_WRITE(DPLL_A, dev_priv->saveDPLL_A);
	396	DRM_UDELAY(150);
	397	if (IS_I965G(dev))
	398	I915_WRITE(DPLL_A_MD, dev_priv->saveDPLL_A_MD);
	399	DRM_UDELAY(150);
	400
	401	/* Restore mode */
	402	I915_WRITE(HTOTAL_A, dev_priv->saveHTOTAL_A);
	403	I915_WRITE(HBLANK_A, dev_priv->saveHBLANK_A);
	404	I915_WRITE(HSYNC_A, dev_priv->saveHSYNC_A);
	405	I915_WRITE(VTOTAL_A, dev_priv->saveVTOTAL_A);
	406	I915_WRITE(VBLANK_A, dev_priv->saveVBLANK_A);
	407	I915_WRITE(VSYNC_A, dev_priv->saveVSYNC_A);
	408	I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);
	409
	410	/* Restore plane info */
	411	I915_WRITE(DSPASIZE, dev_priv->saveDSPASIZE);
	412	I915_WRITE(DSPAPOS, dev_priv->saveDSPAPOS);
	413	I915_WRITE(PIPEASRC, dev_priv->savePIPEASRC);
	414	I915_WRITE(DSPAADDR, dev_priv->saveDSPAADDR);
	415	I915_WRITE(DSPASTRIDE, dev_priv->saveDSPASTRIDE);
	416	if (IS_I965G(dev)) {
	417	I915_WRITE(DSPASURF, dev_priv->saveDSPASURF);
	418	I915_WRITE(DSPATILEOFF, dev_priv->saveDSPATILEOFF);
	419	}
	420
	421	I915_WRITE(PIPEACONF, dev_priv->savePIPEACONF);
	422
	423	i915_restore_palette(dev, PIPE_A);
	424	/* Enable the plane */
	425	I915_WRITE(DSPACNTR, dev_priv->saveDSPACNTR);
	426	I915_WRITE(DSPAADDR, I915_READ(DSPAADDR));
	427
	428	/* Pipe & plane B info */
	429	if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
	430	I915_WRITE(DPLL_B, dev_priv->saveDPLL_B &
	431	~DPLL_VCO_ENABLE);
	432	DRM_UDELAY(150);
	433	}
	434	I915_WRITE(FPB0, dev_priv->saveFPB0);
	435	I915_WRITE(FPB1, dev_priv->saveFPB1);
	436	/* Actually enable it */
	437	I915_WRITE(DPLL_B, dev_priv->saveDPLL_B);
	438	DRM_UDELAY(150);
	439	if (IS_I965G(dev))
	440	I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
	441	DRM_UDELAY(150);
	442
	443	/* Restore mode */
	444	I915_WRITE(HTOTAL_B, dev_priv->saveHTOTAL_B);
	445	I915_WRITE(HBLANK_B, dev_priv->saveHBLANK_B);
	446	I915_WRITE(HSYNC_B, dev_priv->saveHSYNC_B);
447	I915_WRITE(VTOTAL_B, dev_priv->saveVTOTAL_B);
448	I915_WRITE(VBLANK_B, dev_priv->saveVBLANK_B);
449	I915_WRITE(VSYNC_B, dev_priv->saveVSYNC_B);
450	I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);
451
452	/* Restore plane info */
453	I915_WRITE(DSPBSIZE, dev_priv->saveDSPBSIZE);
454	I915_WRITE(DSPBPOS, dev_priv->saveDSPBPOS);
455	I915_WRITE(PIPEBSRC, dev_priv->savePIPEBSRC);
456	I915_WRITE(DSPBADDR, dev_priv->saveDSPBADDR);
457	I915_WRITE(DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
458	if (IS_I965G(dev)) {
459	I915_WRITE(DSPBSURF, dev_priv->saveDSPBSURF);
460	I915_WRITE(DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
461	}
462
463	I915_WRITE(PIPEBCONF, dev_priv->savePIPEBCONF);
464
465	i915_restore_palette(dev, PIPE_B);
466	/* Enable the plane */
467	I915_WRITE(DSPBCNTR, dev_priv->saveDSPBCNTR);
468	I915_WRITE(DSPBADDR, I915_READ(DSPBADDR));
469
470	/* CRT state */
471	I915_WRITE(ADPA, dev_priv->saveADPA);
472
473	/* LVDS state */
474	if (IS_I965G(dev))
475	I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
476	if (IS_MOBILE(dev) && !IS_I830(dev))
477	I915_WRITE(LVDS, dev_priv->saveLVDS);
478	if (!IS_I830(dev) && !IS_845G(dev))
479	I915_WRITE(PFIT_CONTROL, dev_priv->savePFIT_CONTROL);
480
481	I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
482	I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
483	I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
484	I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
485	I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
486	I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
487
488	/* FIXME: restore TV & SDVO state */
489
490	/* FBC info */
491	I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
492	I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
493	I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
494	I915_WRITE(FBC_CONTROL, dev_priv->saveFBC_CONTROL);
495
496	/* VGA state */
497	I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
498	I915_WRITE(VGA0, dev_priv->saveVGA0);
499	I915_WRITE(VGA1, dev_priv->saveVGA1);
500	I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
501	DRM_UDELAY(150);
502
503	/* Clock gating state */
504	I915_WRITE (D_STATE, dev_priv->saveD_STATE);
505	I915_WRITE (CG_2D_DIS, dev_priv->saveCG_2D_DIS);
506
507	/* Cache mode state */
508	I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 \| 0xffff0000);
509
510	/* Memory arbitration state */
511	I915_WRITE (MI_ARB_STATE, dev_priv->saveMI_ARB_STATE \| 0xffff0000);
512
513	for (i = 0; i < 16; i++) {
514	I915_WRITE(SWF00 + (i << 2), dev_priv->saveSWF0[i]);
515	I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i+7]);
516	}
517	for (i = 0; i < 3; i++)
518	I915_WRITE(SWF30 + (i << 2), dev_priv->saveSWF2[i]);
519
520	i915_restore_vga(dev);
521
522	return 0;
523	}
524