From a4ba1ea69f6b6d2b3eee7234deba986a82a77203 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 12 Sep 2023 14:06:28 +0300
Subject: [PATCH] drm/i915: define I915 during i915 driver build

The xe driver will reuse i915 display code by compiling it separately as
part of xe. We'll want to be able to distinguish between building the
i915 display code for i915 and xe. Define I915 when building i915.

Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/97558201836115b91cbe32840239df855d0c2e4c.1694514689.git.jani.nikula@intel.com
---
 drivers/gpu/drm/i915/Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index de4967c141f0..dec78efa452a 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -28,6 +28,10 @@ CFLAGS_i915_pci.o = $(call cc-disable-warning, override-init)
 CFLAGS_display/intel_display_device.o = $(call cc-disable-warning, override-init)
 CFLAGS_display/intel_fbdev.o = $(call cc-disable-warning, override-init)
 
+# Support compiling the display code separately for both i915 and xe
+# drivers. Define I915 when building i915.
+subdir-ccflags-y += -DI915
+
 subdir-ccflags-y += -I$(srctree)/$(src)
 
 # Please keep these build lists sorted!