drm/i915: Ironlake suspend/resume support

This adds registers save/restore for Ironlake to make suspend work.

Signed-off-by: Guo, Chaohong <chaohong.guo@intel.com>
[zhenyuw: some code re-orgnization, and add more save/restore for
FDI link and transcoder registers, also fix palette register for Ironlake]
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

2 files changed, 256 insertions, 55 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f6a3587ad06..9c67f0650a2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -296,6 +296,12 @@ typedef struct drm_i915_private {
         u32 saveVBLANK_A;
         u32 saveVSYNC_A;
         u32 saveBCLRPAT_A;
+        u32 saveTRANS_HTOTAL_A;
+        u32 saveTRANS_HBLANK_A;
+        u32 saveTRANS_HSYNC_A;
+        u32 saveTRANS_VTOTAL_A;
+        u32 saveTRANS_VBLANK_A;
+        u32 saveTRANS_VSYNC_A;
         u32 savePIPEASTAT;
         u32 saveDSPASTRIDE;
         u32 saveDSPASIZE;
@@ -307,6 +313,8 @@ typedef struct drm_i915_private {
         u32 saveBLC_HIST_CTL;
         u32 saveBLC_PWM_CTL;
         u32 saveBLC_PWM_CTL2;
+        u32 saveBLC_CPU_PWM_CTL;
+        u32 saveBLC_CPU_PWM_CTL2;
         u32 saveFPB0;
         u32 saveFPB1;
         u32 saveDPLL_B;
@@ -318,6 +326,12 @@ typedef struct drm_i915_private {
         u32 saveVBLANK_B;
         u32 saveVSYNC_B;
         u32 saveBCLRPAT_B;
+        u32 saveTRANS_HTOTAL_B;
+        u32 saveTRANS_HBLANK_B;
+        u32 saveTRANS_HSYNC_B;
+        u32 saveTRANS_VTOTAL_B;
+        u32 saveTRANS_VBLANK_B;
+        u32 saveTRANS_VSYNC_B;
         u32 savePIPEBSTAT;
         u32 saveDSPBSTRIDE;
         u32 saveDSPBSIZE;
@@ -351,6 +365,12 @@ typedef struct drm_i915_private {
         u32 saveIER;
         u32 saveIIR;
         u32 saveIMR;
+        u32 saveDEIER;
+        u32 saveDEIMR;
+        u32 saveGTIER;
+        u32 saveGTIMR;
+        u32 saveFDI_RXA_IMR;
+        u32 saveFDI_RXB_IMR;
         u32 saveCACHE_MODE_0;
         u32 saveD_STATE;
         u32 saveDSPCLK_GATE_D;
@@ -384,6 +404,16 @@ typedef struct drm_i915_private {
         u32 savePIPEB_DP_LINK_M;
         u32 savePIPEA_DP_LINK_N;
         u32 savePIPEB_DP_LINK_N;
+        u32 saveFDI_RXA_CTL;
+        u32 saveFDI_TXA_CTL;
+        u32 saveFDI_RXB_CTL;
+        u32 saveFDI_TXB_CTL;
+        u32 savePFA_CTL_1;
+        u32 savePFB_CTL_1;
+        u32 savePFA_WIN_SZ;
+        u32 savePFB_WIN_SZ;
+        u32 savePFA_WIN_POS;
+        u32 savePFB_WIN_POS;
 
         struct {
                 struct drm_mm gtt_space;
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 75c5bed48be..992d5617e79 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -32,11 +32,15 @@
 static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
 {
         struct drm_i915_private *dev_priv = dev->dev_private;
+        u32     dpll_reg;
 
-        if (pipe == PIPE_A)
-                return (I915_READ(DPLL_A) & DPLL_VCO_ENABLE);
-        else
-                return (I915_READ(DPLL_B) & DPLL_VCO_ENABLE);
+        if (IS_IGDNG(dev)) {
+                dpll_reg = (pipe == PIPE_A) ? PCH_DPLL_A: PCH_DPLL_B;
+        } else {
+                dpll_reg = (pipe == PIPE_A) ? DPLL_A: DPLL_B;
+        }
+
+        return (I915_READ(dpll_reg) & DPLL_VCO_ENABLE);
 }
 
 static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
@@ -49,6 +53,9 @@ static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
         if (!i915_pipe_enabled(dev, pipe))
                 return;
 
+        if (IS_IGDNG(dev))
+                reg = (pipe == PIPE_A) ? LGC_PALETTE_A : LGC_PALETTE_B;
+
         if (pipe == PIPE_A)
                 array = dev_priv->save_palette_a;
         else
@@ -68,6 +75,9 @@ static void i915_restore_palette(struct drm_device *dev, enum pipe pipe)
         if (!i915_pipe_enabled(dev, pipe))
                 return;
 
+        if (IS_IGDNG(dev))
+                reg = (pipe == PIPE_A) ? LGC_PALETTE_A : LGC_PALETTE_B;
+
         if (pipe == PIPE_A)
                 array = dev_priv->save_palette_a;
         else
@@ -232,10 +242,16 @@ static void i915_save_modeset_reg(struct drm_device *dev)
         /* 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))
+        if (IS_IGDNG(dev)) {
+                dev_priv->saveFPA0 = I915_READ(PCH_FPA0);
+                dev_priv->saveFPA1 = I915_READ(PCH_FPA1);
+                dev_priv->saveDPLL_A = I915_READ(PCH_DPLL_A);
+        } else {
+                dev_priv->saveFPA0 = I915_READ(FPA0);
+                dev_priv->saveFPA1 = I915_READ(FPA1);
+                dev_priv->saveDPLL_A = I915_READ(DPLL_A);
+        }
+        if (IS_I965G(dev) && !IS_IGDNG(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);
@@ -243,7 +259,24 @@ static void i915_save_modeset_reg(struct drm_device *dev)
         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);
+        if (!IS_IGDNG(dev))
+                dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
+
+        if (IS_IGDNG(dev)) {
+                dev_priv->saveFDI_TXA_CTL = I915_READ(FDI_TXA_CTL);
+                dev_priv->saveFDI_RXA_CTL = I915_READ(FDI_RXA_CTL);
+
+                dev_priv->savePFA_CTL_1 = I915_READ(PFA_CTL_1);
+                dev_priv->savePFA_WIN_SZ = I915_READ(PFA_WIN_SZ);
+                dev_priv->savePFA_WIN_POS = I915_READ(PFA_WIN_POS);
+
+                dev_priv->saveTRANS_HTOTAL_A = I915_READ(TRANS_HTOTAL_A);
+                dev_priv->saveTRANS_HBLANK_A = I915_READ(TRANS_HBLANK_A);
+                dev_priv->saveTRANS_HSYNC_A = I915_READ(TRANS_HSYNC_A);
+                dev_priv->saveTRANS_VTOTAL_A = I915_READ(TRANS_VTOTAL_A);
+                dev_priv->saveTRANS_VBLANK_A = I915_READ(TRANS_VBLANK_A);
+                dev_priv->saveTRANS_VSYNC_A = I915_READ(TRANS_VSYNC_A);
+        }
 
         dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
         dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
@@ -260,10 +293,16 @@ static void i915_save_modeset_reg(struct drm_device *dev)
         /* 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))
+        if (IS_IGDNG(dev)) {
+                dev_priv->saveFPB0 = I915_READ(PCH_FPB0);
+                dev_priv->saveFPB1 = I915_READ(PCH_FPB1);
+                dev_priv->saveDPLL_B = I915_READ(PCH_DPLL_B);
+        } else {
+                dev_priv->saveFPB0 = I915_READ(FPB0);
+                dev_priv->saveFPB1 = I915_READ(FPB1);
+                dev_priv->saveDPLL_B = I915_READ(DPLL_B);
+        }
+        if (IS_I965G(dev) && !IS_IGDNG(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);
@@ -271,7 +310,24 @@ static void i915_save_modeset_reg(struct drm_device *dev)
         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);
+        if (!IS_IGDNG(dev))
+                dev_priv->saveBCLRPAT_B = I915_READ(BCLRPAT_B);
+
+        if (IS_IGDNG(dev)) {
+                dev_priv->saveFDI_TXB_CTL = I915_READ(FDI_TXB_CTL);
+                dev_priv->saveFDI_RXB_CTL = I915_READ(FDI_RXB_CTL);
+
+                dev_priv->savePFB_CTL_1 = I915_READ(PFB_CTL_1);
+                dev_priv->savePFB_WIN_SZ = I915_READ(PFB_WIN_SZ);
+                dev_priv->savePFB_WIN_POS = I915_READ(PFB_WIN_POS);
+
+                dev_priv->saveTRANS_HTOTAL_B = I915_READ(TRANS_HTOTAL_B);
+                dev_priv->saveTRANS_HBLANK_B = I915_READ(TRANS_HBLANK_B);
+                dev_priv->saveTRANS_HSYNC_B = I915_READ(TRANS_HSYNC_B);
+                dev_priv->saveTRANS_VTOTAL_B = I915_READ(TRANS_VTOTAL_B);
+                dev_priv->saveTRANS_VBLANK_B = I915_READ(TRANS_VBLANK_B);
+                dev_priv->saveTRANS_VSYNC_B = I915_READ(TRANS_VSYNC_B);
+        }
 
         dev_priv->saveDSPBCNTR = I915_READ(DSPBCNTR);
         dev_priv->saveDSPBSTRIDE = I915_READ(DSPBSTRIDE);
@@ -290,23 +346,41 @@ static void i915_save_modeset_reg(struct drm_device *dev)
 static void i915_restore_modeset_reg(struct drm_device *dev)
 {
         struct drm_i915_private *dev_priv = dev->dev_private;
+        int dpll_a_reg, fpa0_reg, fpa1_reg;
+        int dpll_b_reg, fpb0_reg, fpb1_reg;
 
         if (drm_core_check_feature(dev, DRIVER_MODESET))
                 return;
 
+        if (IS_IGDNG(dev)) {
+                dpll_a_reg = PCH_DPLL_A;
+                dpll_b_reg = PCH_DPLL_B;
+                fpa0_reg = PCH_FPA0;
+                fpb0_reg = PCH_FPB0;
+                fpa1_reg = PCH_FPA1;
+                fpb1_reg = PCH_FPB1;
+        } else {
+                dpll_a_reg = DPLL_A;
+                dpll_b_reg = DPLL_B;
+                fpa0_reg = FPA0;
+                fpb0_reg = FPB0;
+                fpa1_reg = FPA1;
+                fpb1_reg = FPB1;
+        }
+
         /* Pipe & plane A info */
         /* Prime the clock */
         if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
-                I915_WRITE(DPLL_A, dev_priv->saveDPLL_A &
+                I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A &
                            ~DPLL_VCO_ENABLE);
                 DRM_UDELAY(150);
         }
-        I915_WRITE(FPA0, dev_priv->saveFPA0);
-        I915_WRITE(FPA1, dev_priv->saveFPA1);
+        I915_WRITE(fpa0_reg, dev_priv->saveFPA0);
+        I915_WRITE(fpa1_reg, dev_priv->saveFPA1);
         /* Actually enable it */
-        I915_WRITE(DPLL_A, dev_priv->saveDPLL_A);
+        I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A);
         DRM_UDELAY(150);
-        if (IS_I965G(dev))
+        if (IS_I965G(dev) && !IS_IGDNG(dev))
                 I915_WRITE(DPLL_A_MD, dev_priv->saveDPLL_A_MD);
         DRM_UDELAY(150);
 
@@ -317,7 +391,24 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
         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);
+        if (!IS_IGDNG(dev))
+                I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);
+
+        if (IS_IGDNG(dev)) {
+                I915_WRITE(FDI_RXA_CTL, dev_priv->saveFDI_RXA_CTL);
+                I915_WRITE(FDI_TXA_CTL, dev_priv->saveFDI_TXA_CTL);
+
+                I915_WRITE(PFA_CTL_1, dev_priv->savePFA_CTL_1);
+                I915_WRITE(PFA_WIN_SZ, dev_priv->savePFA_WIN_SZ);
+                I915_WRITE(PFA_WIN_POS, dev_priv->savePFA_WIN_POS);
+
+                I915_WRITE(TRANS_HTOTAL_A, dev_priv->saveTRANS_HTOTAL_A);
+                I915_WRITE(TRANS_HBLANK_A, dev_priv->saveTRANS_HBLANK_A);
+                I915_WRITE(TRANS_HSYNC_A, dev_priv->saveTRANS_HSYNC_A);
+                I915_WRITE(TRANS_VTOTAL_A, dev_priv->saveTRANS_VTOTAL_A);
+                I915_WRITE(TRANS_VBLANK_A, dev_priv->saveTRANS_VBLANK_A);
+                I915_WRITE(TRANS_VSYNC_A, dev_priv->saveTRANS_VSYNC_A);
+        }
 
         /* Restore plane info */
         I915_WRITE(DSPASIZE, dev_priv->saveDSPASIZE);
@@ -339,14 +430,14 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
 
         /* Pipe & plane B info */
         if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
-                I915_WRITE(DPLL_B, dev_priv->saveDPLL_B &
+                I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B &
                            ~DPLL_VCO_ENABLE);
                 DRM_UDELAY(150);
         }
-        I915_WRITE(FPB0, dev_priv->saveFPB0);
-        I915_WRITE(FPB1, dev_priv->saveFPB1);
+        I915_WRITE(fpb0_reg, dev_priv->saveFPB0);
+        I915_WRITE(fpb1_reg, dev_priv->saveFPB1);
         /* Actually enable it */
-        I915_WRITE(DPLL_B, dev_priv->saveDPLL_B);
+        I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B);
         DRM_UDELAY(150);
         if (IS_I965G(dev))
                 I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
@@ -359,7 +450,24 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
         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);
+        if (!IS_IGDNG(dev))
+                I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);
+
+        if (IS_IGDNG(dev)) {
+                I915_WRITE(FDI_RXB_CTL, dev_priv->saveFDI_RXB_CTL);
+                I915_WRITE(FDI_TXB_CTL, dev_priv->saveFDI_TXB_CTL);
+
+                I915_WRITE(PFB_CTL_1, dev_priv->savePFB_CTL_1);
+                I915_WRITE(PFB_WIN_SZ, dev_priv->savePFB_WIN_SZ);
+                I915_WRITE(PFB_WIN_POS, dev_priv->savePFB_WIN_POS);
+
+                I915_WRITE(TRANS_HTOTAL_B, dev_priv->saveTRANS_HTOTAL_B);
+                I915_WRITE(TRANS_HBLANK_B, dev_priv->saveTRANS_HBLANK_B);
+                I915_WRITE(TRANS_HSYNC_B, dev_priv->saveTRANS_HSYNC_B);
+                I915_WRITE(TRANS_VTOTAL_B, dev_priv->saveTRANS_VTOTAL_B);
+                I915_WRITE(TRANS_VBLANK_B, dev_priv->saveTRANS_VBLANK_B);
+                I915_WRITE(TRANS_VSYNC_B, dev_priv->saveTRANS_VSYNC_B);
+        }
 
         /* Restore plane info */
         I915_WRITE(DSPBSIZE, dev_priv->saveDSPBSIZE);
@@ -404,22 +512,43 @@ void i915_save_display(struct drm_device *dev)
                 dev_priv->saveCURSIZE = I915_READ(CURSIZE);
 
         /* CRT state */
-        dev_priv->saveADPA = I915_READ(ADPA);
+        if (IS_IGDNG(dev)) {
+                dev_priv->saveADPA = I915_READ(PCH_ADPA);
+        } else {
+                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);
-        dev_priv->saveBLC_HIST_CTL = I915_READ(BLC_HIST_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))
+        if (IS_IGDNG(dev)) {
+                dev_priv->savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
+                dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_PCH_CTL1);
+                dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_PCH_CTL2);
+                dev_priv->saveBLC_CPU_PWM_CTL = I915_READ(BLC_PWM_CPU_CTL);
+                dev_priv->saveBLC_CPU_PWM_CTL2 = I915_READ(BLC_PWM_CPU_CTL2);
+                dev_priv->saveLVDS = I915_READ(PCH_LVDS);
+        } else {
+                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);
+                dev_priv->saveBLC_HIST_CTL = I915_READ(BLC_HIST_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) && !IS_IGDNG(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);
+
+        if (IS_IGDNG(dev)) {
+                dev_priv->savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
+                dev_priv->savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
+                dev_priv->savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR);
+        } else {
+                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);
+        }
 
         /* Display Port state */
         if (SUPPORTS_INTEGRATED_DP(dev)) {
@@ -451,7 +580,10 @@ void i915_save_display(struct drm_device *dev)
         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);
+        if (IS_IGDNG(dev))
+                dev_priv->saveVGACNTRL = I915_READ(CPU_VGACNTRL);
+        else
+                dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
 
         i915_save_vga(dev);
 }
@@ -490,23 +622,41 @@ void i915_restore_display(struct drm_device *dev)
                 I915_WRITE(CURSIZE, dev_priv->saveCURSIZE);
 
         /* CRT state */
-        I915_WRITE(ADPA, dev_priv->saveADPA);
+        if (IS_IGDNG(dev))
+                I915_WRITE(PCH_ADPA, dev_priv->saveADPA);
+        else
+                I915_WRITE(ADPA, dev_priv->saveADPA);
 
         /* LVDS state */
-        if (IS_I965G(dev))
+        if (IS_I965G(dev) && !IS_IGDNG(dev))
                 I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
-        if (IS_MOBILE(dev) && !IS_I830(dev))
+
+        if (IS_IGDNG(dev)) {
+                I915_WRITE(PCH_LVDS, dev_priv->saveLVDS);
+        } else if (IS_MOBILE(dev) && !IS_I830(dev))
                 I915_WRITE(LVDS, dev_priv->saveLVDS);
-        if (!IS_I830(dev) && !IS_845G(dev))
+
+        if (!IS_I830(dev) && !IS_845G(dev) && !IS_IGDNG(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(BLC_HIST_CTL, dev_priv->saveBLC_HIST_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);
+        if (IS_IGDNG(dev)) {
+                I915_WRITE(BLC_PWM_PCH_CTL1, dev_priv->saveBLC_PWM_CTL);
+                I915_WRITE(BLC_PWM_PCH_CTL2, dev_priv->saveBLC_PWM_CTL2);
+                I915_WRITE(BLC_PWM_CPU_CTL, dev_priv->saveBLC_CPU_PWM_CTL);
+                I915_WRITE(BLC_PWM_CPU_CTL2, dev_priv->saveBLC_CPU_PWM_CTL2);
+                I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
+                I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
+                I915_WRITE(PCH_PP_DIVISOR, dev_priv->savePP_DIVISOR);
+                I915_WRITE(PCH_PP_CONTROL, dev_priv->savePP_CONTROL);
+        } else {
+                I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
+                I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
+                I915_WRITE(BLC_HIST_CTL, dev_priv->saveBLC_HIST_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);
+        }
 
         /* Display Port state */
         if (SUPPORTS_INTEGRATED_DP(dev)) {
@@ -529,7 +679,10 @@ void i915_restore_display(struct drm_device *dev)
         }
 
         /* VGA state */
-        I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
+        if (IS_IGDNG(dev))
+                I915_WRITE(CPU_VGACNTRL, dev_priv->saveVGACNTRL);
+        else
+                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);
@@ -555,8 +708,17 @@ int i915_save_state(struct drm_device *dev)
         i915_save_display(dev);
 
         /* Interrupt state */
-        dev_priv->saveIER = I915_READ(IER);
-        dev_priv->saveIMR = I915_READ(IMR);
+        if (IS_IGDNG(dev)) {
+                dev_priv->saveDEIER = I915_READ(DEIER);
+                dev_priv->saveDEIMR = I915_READ(DEIMR);
+                dev_priv->saveGTIER = I915_READ(GTIER);
+                dev_priv->saveGTIMR = I915_READ(GTIMR);
+                dev_priv->saveFDI_RXA_IMR = I915_READ(FDI_RXA_IMR);
+                dev_priv->saveFDI_RXB_IMR = I915_READ(FDI_RXB_IMR);
+        } else {
+                dev_priv->saveIER = I915_READ(IER);
+                dev_priv->saveIMR = I915_READ(IMR);
+        }
 
         /* Clock gating state */
         dev_priv->saveD_STATE = I915_READ(D_STATE);
@@ -621,8 +783,17 @@ int i915_restore_state(struct drm_device *dev)
         i915_restore_display(dev);
 
         /* Interrupt state */
-        I915_WRITE (IER, dev_priv->saveIER);
-        I915_WRITE (IMR,  dev_priv->saveIMR);
+        if (IS_IGDNG(dev)) {
+                I915_WRITE(DEIER, dev_priv->saveDEIER);
+                I915_WRITE(DEIMR, dev_priv->saveDEIMR);
+                I915_WRITE(GTIER, dev_priv->saveGTIER);
+                I915_WRITE(GTIMR, dev_priv->saveGTIMR);
+                I915_WRITE(FDI_RXA_IMR, dev_priv->saveFDI_RXA_IMR);
+                I915_WRITE(FDI_RXB_IMR, dev_priv->saveFDI_RXB_IMR);
+        } else {
+                I915_WRITE (IER, dev_priv->saveIER);
+                I915_WRITE (IMR,  dev_priv->saveIMR);
+        }
 
         /* Clock gating state */
         I915_WRITE (D_STATE, dev_priv->saveD_STATE);