drm/i915: Don't restore palettes through VGA registers.

The VGA registers just hit the pipe registers that we already set through
MMIO.  This fixes strange colors on resume.
Signed-off-by: NPierre Willenbrock <pierre@pirsoft.de>
Signed-off-by: NEric Anholt <eric@anholt.net>

drivers/gpu/drm/i915/i915_drv.h

@@ -279,7 +279,6 @@ typedef struct drm_i915_private {
 	u8 saveAR_INDEX;
 	u8 saveAR[21];
 	u8 saveDACMASK;
-	u8 saveDACDATA[256*3]; /* 256 3-byte colors */
 	u8 saveCR[37];
 
 	struct {

drivers/gpu/drm/i915/i915_suspend.c

@@ -119,11 +119,6 @@ static void i915_save_vga(struct drm_device *dev)
 
 	/* 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);
@@ -225,12 +220,6 @@ static void i915_restore_vga(struct drm_device *dev)
 
 	/* 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)