drm/i915: Add more registers save/restore for Ironlake suspend

Add more display registers save/restore to fix unstable issues
during S4 testing on Ironlake. And DPLL_B_MD should not be restored
on Ironlake.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

2 files changed, 47 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 57204e29897..a725f659119 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -296,6 +296,7 @@ typedef struct drm_i915_private {
         u32 saveVBLANK_A;
         u32 saveVSYNC_A;
         u32 saveBCLRPAT_A;
+        u32 saveTRANSACONF;
         u32 saveTRANS_HTOTAL_A;
         u32 saveTRANS_HBLANK_A;
         u32 saveTRANS_HSYNC_A;
@@ -326,6 +327,7 @@ typedef struct drm_i915_private {
         u32 saveVBLANK_B;
         u32 saveVSYNC_B;
         u32 saveBCLRPAT_B;
+        u32 saveTRANSBCONF;
         u32 saveTRANS_HTOTAL_B;
         u32 saveTRANS_HBLANK_B;
         u32 saveTRANS_HSYNC_B;
@@ -414,6 +416,16 @@ typedef struct drm_i915_private {
         u32 savePFB_WIN_SZ;
         u32 savePFA_WIN_POS;
         u32 savePFB_WIN_POS;
+        u32 savePCH_DREF_CONTROL;
+        u32 saveDISP_ARB_CTL;
+        u32 savePIPEA_DATA_M1;
+        u32 savePIPEA_DATA_N1;
+        u32 savePIPEA_LINK_M1;
+        u32 savePIPEA_LINK_N1;
+        u32 savePIPEB_DATA_M1;
+        u32 savePIPEB_DATA_N1;
+        u32 savePIPEB_LINK_M1;
+        u32 savePIPEB_LINK_N1;
 
         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 992d5617e79..6eec8171a44 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -239,6 +239,11 @@ static void i915_save_modeset_reg(struct drm_device *dev)
         if (drm_core_check_feature(dev, DRIVER_MODESET))
                 return;
 
+        if (IS_IGDNG(dev)) {
+                dev_priv->savePCH_DREF_CONTROL = I915_READ(PCH_DREF_CONTROL);
+                dev_priv->saveDISP_ARB_CTL = I915_READ(DISP_ARB_CTL);
+        }
+
         /* Pipe & plane A info */
         dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
         dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
@@ -263,6 +268,11 @@ static void i915_save_modeset_reg(struct drm_device *dev)
                 dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
 
         if (IS_IGDNG(dev)) {
+                dev_priv->savePIPEA_DATA_M1 = I915_READ(PIPEA_DATA_M1);
+                dev_priv->savePIPEA_DATA_N1 = I915_READ(PIPEA_DATA_N1);
+                dev_priv->savePIPEA_LINK_M1 = I915_READ(PIPEA_LINK_M1);
+                dev_priv->savePIPEA_LINK_N1 = I915_READ(PIPEA_LINK_N1);
+
                 dev_priv->saveFDI_TXA_CTL = I915_READ(FDI_TXA_CTL);
                 dev_priv->saveFDI_RXA_CTL = I915_READ(FDI_RXA_CTL);
 
@@ -270,6 +280,7 @@ static void i915_save_modeset_reg(struct drm_device *dev)
                 dev_priv->savePFA_WIN_SZ = I915_READ(PFA_WIN_SZ);
                 dev_priv->savePFA_WIN_POS = I915_READ(PFA_WIN_POS);
 
+                dev_priv->saveTRANSACONF = I915_READ(TRANSACONF);
                 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);
@@ -314,6 +325,11 @@ static void i915_save_modeset_reg(struct drm_device *dev)
                 dev_priv->saveBCLRPAT_B = I915_READ(BCLRPAT_B);
 
         if (IS_IGDNG(dev)) {
+                dev_priv->savePIPEB_DATA_M1 = I915_READ(PIPEB_DATA_M1);
+                dev_priv->savePIPEB_DATA_N1 = I915_READ(PIPEB_DATA_N1);
+                dev_priv->savePIPEB_LINK_M1 = I915_READ(PIPEB_LINK_M1);
+                dev_priv->savePIPEB_LINK_N1 = I915_READ(PIPEB_LINK_N1);
+
                 dev_priv->saveFDI_TXB_CTL = I915_READ(FDI_TXB_CTL);
                 dev_priv->saveFDI_RXB_CTL = I915_READ(FDI_RXB_CTL);
 
@@ -321,6 +337,7 @@ static void i915_save_modeset_reg(struct drm_device *dev)
                 dev_priv->savePFB_WIN_SZ = I915_READ(PFB_WIN_SZ);
                 dev_priv->savePFB_WIN_POS = I915_READ(PFB_WIN_POS);
 
+                dev_priv->saveTRANSBCONF = I915_READ(TRANSBCONF);
                 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);
@@ -368,6 +385,11 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
                 fpb1_reg = FPB1;
         }
 
+        if (IS_IGDNG(dev)) {
+                I915_WRITE(PCH_DREF_CONTROL, dev_priv->savePCH_DREF_CONTROL);
+                I915_WRITE(DISP_ARB_CTL, dev_priv->saveDISP_ARB_CTL);
+        }
+
         /* Pipe & plane A info */
         /* Prime the clock */
         if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
@@ -395,6 +417,11 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
                 I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);
 
         if (IS_IGDNG(dev)) {
+                I915_WRITE(PIPEA_DATA_M1, dev_priv->savePIPEA_DATA_M1);
+                I915_WRITE(PIPEA_DATA_N1, dev_priv->savePIPEA_DATA_N1);
+                I915_WRITE(PIPEA_LINK_M1, dev_priv->savePIPEA_LINK_M1);
+                I915_WRITE(PIPEA_LINK_N1, dev_priv->savePIPEA_LINK_N1);
+
                 I915_WRITE(FDI_RXA_CTL, dev_priv->saveFDI_RXA_CTL);
                 I915_WRITE(FDI_TXA_CTL, dev_priv->saveFDI_TXA_CTL);
 
@@ -402,6 +429,7 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
                 I915_WRITE(PFA_WIN_SZ, dev_priv->savePFA_WIN_SZ);
                 I915_WRITE(PFA_WIN_POS, dev_priv->savePFA_WIN_POS);
 
+                I915_WRITE(TRANSACONF, dev_priv->saveTRANSACONF);
                 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);
@@ -439,7 +467,7 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
         /* Actually enable it */
         I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B);
         DRM_UDELAY(150);
-        if (IS_I965G(dev))
+        if (IS_I965G(dev) && !IS_IGDNG(dev))
                 I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
         DRM_UDELAY(150);
 
@@ -454,6 +482,11 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
                 I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);
 
         if (IS_IGDNG(dev)) {
+                I915_WRITE(PIPEB_DATA_M1, dev_priv->savePIPEB_DATA_M1);
+                I915_WRITE(PIPEB_DATA_N1, dev_priv->savePIPEB_DATA_N1);
+                I915_WRITE(PIPEB_LINK_M1, dev_priv->savePIPEB_LINK_M1);
+                I915_WRITE(PIPEB_LINK_N1, dev_priv->savePIPEB_LINK_N1);
+
                 I915_WRITE(FDI_RXB_CTL, dev_priv->saveFDI_RXB_CTL);
                 I915_WRITE(FDI_TXB_CTL, dev_priv->saveFDI_TXB_CTL);
 
@@ -461,6 +494,7 @@ static void i915_restore_modeset_reg(struct drm_device *dev)
                 I915_WRITE(PFB_WIN_SZ, dev_priv->savePFB_WIN_SZ);
                 I915_WRITE(PFB_WIN_POS, dev_priv->savePFB_WIN_POS);
 
+                I915_WRITE(TRANSBCONF, dev_priv->saveTRANSBCONF);
                 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);