Revert "drm/i915: Delay disabling of VGA memory until vgacon->fbcon handoff is done"

This reverts commit 6e1b4fda.

This is part of a revert due to a userspace breakage, better explained in the revert of 1a1a4cbf4906a13c0c377f708df5d94168e7b582.
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/i915/i915_dma.c

@@ -1351,12 +1351,6 @@ static int i915_load_modeset_init(struct drm_device *dev)
 	 */
 	intel_fbdev_initial_config(dev);
 
-	/*
-	 * Must do this after fbcon init so that
-	 * vgacon_save_screen() works during the handover.
-	 */
-	i915_disable_vga_mem(dev);
-
 	/* Only enable hotplug handling once the fbdev is fully set up. */
 	dev_priv->enable_hotplug_processing = true;
 

drivers/gpu/drm/i915/intel_display.c

@@ -10038,6 +10038,15 @@ static void i915_disable_vga(struct drm_device *dev)
 	outb(SR01, VGA_SR_INDEX);
 	sr1 = inb(VGA_SR_DATA);
 	outb(sr1 | 1<<5, VGA_SR_DATA);
+
+	/* Disable VGA memory on Intel HD */
+	if (HAS_PCH_SPLIT(dev)) {
+		outb(inb(VGA_MSR_READ) & ~VGA_MSR_MEM_EN, VGA_MSR_WRITE);
+		vga_set_legacy_decoding(dev->pdev, VGA_RSRC_LEGACY_IO |
+						   VGA_RSRC_NORMAL_IO |
+						   VGA_RSRC_NORMAL_MEM);
+	}
+
 	vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
 	udelay(300);
 
@@ -10045,7 +10054,7 @@ static void i915_disable_vga(struct drm_device *dev)
 	POSTING_READ(vga_reg);
 }
 
-static void i915_enable_vga_mem(struct drm_device *dev)
+static void i915_enable_vga(struct drm_device *dev)
 {
 	/* Enable VGA memory on Intel HD */
 	if (HAS_PCH_SPLIT(dev)) {
@@ -10059,19 +10068,6 @@ static void i915_enable_vga_mem(struct drm_device *dev)
 	}
 }
 
-void i915_disable_vga_mem(struct drm_device *dev)
-{
-	/* Disable VGA memory on Intel HD */
-	if (HAS_PCH_SPLIT(dev)) {
-		vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
-		outb(inb(VGA_MSR_READ) & ~VGA_MSR_MEM_EN, VGA_MSR_WRITE);
-		vga_set_legacy_decoding(dev->pdev, VGA_RSRC_LEGACY_IO |
-						   VGA_RSRC_NORMAL_IO |
-						   VGA_RSRC_NORMAL_MEM);
-		vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
-	}
-}
-
 void intel_modeset_init_hw(struct drm_device *dev)
 {
 	intel_init_power_well(dev);
@@ -10350,7 +10346,6 @@ void i915_redisable_vga(struct drm_device *dev)
 	if (I915_READ(vga_reg) != VGA_DISP_DISABLE) {
 		DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
 		i915_disable_vga(dev);
-		i915_disable_vga_mem(dev);
 	}
 }
 
@@ -10564,7 +10559,7 @@ void intel_modeset_cleanup(struct drm_device *dev)
 
 	intel_disable_fbc(dev);
 
-	i915_enable_vga_mem(dev);
+	i915_enable_vga(dev);
 
 	intel_disable_gt_powersave(dev);
 

drivers/gpu/drm/i915/intel_drv.h

@@ -793,6 +793,5 @@ extern void hsw_pc8_disable_interrupts(struct drm_device *dev);
 extern void hsw_pc8_restore_interrupts(struct drm_device *dev);
 extern void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv);
 extern void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv);
-extern void i915_disable_vga_mem(struct drm_device *dev);
 
 #endif /* __INTEL_DRV_H__ */