[Intel-xe] [v2 3/3] drm/xe: Create a dummy version for vga decode

[Uma Shankar]

This introduces an exclusive version of vga decode for xe.
Rest of the display changes will be re-used from i915.

Currently it adds just a dummy implementation. VGA decode
needs to be handled correctly in i915, proper implementation
will be adopted once the i915 changes are finalized and merged
in upstream.

v2: Addressed Arun's review comments

Signed-off-by: Uma Shankar <uma.shankar at intel.com>
---
 drivers/gpu/drm/xe/Makefile                  |  1 +
 drivers/gpu/drm/xe/display/xe_display_misc.c | 14 ++++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 drivers/gpu/drm/xe/display/xe_display_misc.c

diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index dff1386ee6b3..175a357366d9 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -150,6 +150,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
 	display/xe_hdcp_gsc.o \
 	display/xe_plane_initial.o \
 	display/xe_display_rps.o \
+	display/xe_display_misc.o \
 	display/ext/i915_irq.o \
 	display/ext/i915_utils.o
 
diff --git a/drivers/gpu/drm/xe/display/xe_display_misc.c b/drivers/gpu/drm/xe/display/xe_display_misc.c
new file mode 100644
index 000000000000..81ff97e704ea
--- /dev/null
+++ b/drivers/gpu/drm/xe/display/xe_display_misc.c
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#include "intel_display_types.h"
+
+struct pci_dev;
+
+unsigned int intel_gmch_vga_set_decode(struct pci_dev *pdev, bool enable_decode)
+{
+	/* ToDo: Implement the actual handling of vga decode */
+	return 0;
+}
-- 
2.42.0