[v3] drm/i915/display: Created exclusive version of vga decode setup

[Uma Shankar <uma.shankar@xxxxxxxxx>]

Some of the VGA functionality is not needed by the proposed
Intel Xe driver, while this will be utilized by i915.
Created a version of the function to be used exclusively by i915.
Xe will implement it's own respective version.

v2: Addressed Jani Nikula's review comments.

v3: Dropped a duplicate function (Jani)

Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
 drivers/gpu/drm/i915/display/intel_vga.c | 18 +-----------------
 drivers/gpu/drm/i915/soc/intel_gmch.c    | 14 ++++++++++++++
 drivers/gpu/drm/i915/soc/intel_gmch.h    |  2 ++
 3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vga.c b/drivers/gpu/drm/i915/display/intel_vga.c
index 286a0bdd28c6..4b98833bfa8c 100644
--- a/drivers/gpu/drm/i915/display/intel_vga.c
+++ b/drivers/gpu/drm/i915/display/intel_vga.c
@@ -3,11 +3,9 @@
  * Copyright © 2019 Intel Corporation
  */
 
-#include <linux/pci.h>
 #include <linux/vgaarb.h>
 
 #include <video/vga.h>
-
 #include "soc/intel_gmch.h"
 
 #include "i915_drv.h"
@@ -99,20 +97,6 @@ void intel_vga_reset_io_mem(struct drm_i915_private *i915)
 	vga_put(pdev, VGA_RSRC_LEGACY_IO);
 }
 
-static unsigned int
-intel_vga_set_decode(struct pci_dev *pdev, bool enable_decode)
-{
-	struct drm_i915_private *i915 = pdev_to_i915(pdev);
-
-	intel_gmch_vga_set_state(i915, enable_decode);
-
-	if (enable_decode)
-		return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
-		       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
-	else
-		return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
-}
-
 int intel_vga_register(struct drm_i915_private *i915)
 {
 
@@ -127,7 +111,7 @@ int intel_vga_register(struct drm_i915_private *i915)
 	 * then we do not take part in VGA arbitration and the
 	 * vga_client_register() fails with -ENODEV.
 	 */
-	ret = vga_client_register(pdev, intel_vga_set_decode);
+	ret = vga_client_register(pdev, intel_gmch_vga_set_decode);
 	if (ret && ret != -ENODEV)
 		return ret;
 
diff --git a/drivers/gpu/drm/i915/soc/intel_gmch.c b/drivers/gpu/drm/i915/soc/intel_gmch.c
index 49c7fb16e934..f32e9f78770a 100644
--- a/drivers/gpu/drm/i915/soc/intel_gmch.c
+++ b/drivers/gpu/drm/i915/soc/intel_gmch.c
@@ -5,6 +5,7 @@
 
 #include <linux/pci.h>
 #include <linux/pnp.h>
+#include <linux/vgaarb.h>
 
 #include <drm/drm_managed.h>
 #include <drm/i915_drm.h>
@@ -167,3 +168,16 @@ int intel_gmch_vga_set_state(struct drm_i915_private *i915, bool enable_decode)
 
 	return 0;
 }
+
+unsigned int intel_gmch_vga_set_decode(struct pci_dev *pdev, bool enable_decode)
+{
+	struct drm_i915_private *i915 = pdev_to_i915(pdev);
+
+	intel_gmch_vga_set_state(i915, enable_decode);
+
+	if (enable_decode)
+		return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
+		       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
+	else
+		return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
+}
diff --git a/drivers/gpu/drm/i915/soc/intel_gmch.h b/drivers/gpu/drm/i915/soc/intel_gmch.h
index d0133eedc720..23be2d113afd 100644
--- a/drivers/gpu/drm/i915/soc/intel_gmch.h
+++ b/drivers/gpu/drm/i915/soc/intel_gmch.h
@@ -8,11 +8,13 @@
 
 #include <linux/types.h>
 
+struct pci_dev;
 struct drm_i915_private;
 
 int intel_gmch_bridge_setup(struct drm_i915_private *i915);
 void intel_gmch_bar_setup(struct drm_i915_private *i915);
 void intel_gmch_bar_teardown(struct drm_i915_private *i915);
 int intel_gmch_vga_set_state(struct drm_i915_private *i915, bool enable_decode);
+unsigned int intel_gmch_vga_set_decode(struct pci_dev *pdev, bool enable_decode);
 
 #endif /* __INTEL_GMCH_H__ */
-- 
2.42.0