drm/i915: Avoid saving/restore the modesetting registers twice in KMS mode

In KMS mode we now use the normal mode-setting paths to set the modes
back to the current configuration, so we don't need to also run the more
limited non-KMS implementation of modesetting for resume.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 121 insertions, 100 deletions

diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 8d8e083d14ab..9e1d16e5c3ea 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -222,23 +222,12 @@ static void i915_restore_vga(struct drm_device *dev)
         I915_WRITE8(VGA_DACMASK, dev_priv->saveDACMASK);
 }
 
-int i915_save_state(struct drm_device *dev)
+static void i915_save_modeset_reg(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);
 
+        if (drm_core_check_feature(dev, DRIVER_MODESET))
+                return;
         /* Pipe & plane A info */
         dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
         dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
@@ -294,7 +283,122 @@ int i915_save_state(struct drm_device *dev)
         }
         i915_save_palette(dev, PIPE_B);
         dev_priv->savePIPEBSTAT = I915_READ(PIPEBSTAT);
+        return;
+}
+static void i915_restore_modeset_reg(struct drm_device *dev)
+{
+        struct drm_i915_private *dev_priv = dev->dev_private;
+
+        if (drm_core_check_feature(dev, DRIVER_MODESET))
+                return;
+
+        /* 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));
 
+        return;
+}
+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);
+
+        /* This is only meaningful in non-KMS mode */
+        /* Don't save them in KMS mode */
+        i915_save_modeset_reg(dev);
         /* Cursor state */
         dev_priv->saveCURACNTR = I915_READ(CURACNTR);
         dev_priv->saveCURAPOS = I915_READ(CURAPOS);
@@ -430,92 +534,9 @@ int i915_restore_state(struct drm_device *dev)
                 I915_WRITE(PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
                 I915_WRITE(PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
         }
-        
-        /* 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));
-
+        /* This is only meaningful in non-KMS mode */
+        /* Don't restore them in KMS mode */
+        i915_restore_modeset_reg(dev);
         /* Cursor state */
         I915_WRITE(CURAPOS, dev_priv->saveCURAPOS);
         I915_WRITE(CURACNTR, dev_priv->saveCURACNTR);