drm/i915: add i915_config.h and move relevant declarations there

We already have i915_config.c. Add the i915_config.h counterpart, and
declutter i915_drv.h in the process.

Signed-off-by: Jani Nikula <[e-mail]>
Reviewed-by: Tvrtko Ursulin <[e-mail]>
Acked-by: Nirmoy Das <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/display/intel_atomic_plane.c

···
 
 #include "gt/intel_rps.h"
 
+#include "i915_config.h"
 #include "intel_atomic_plane.h"
 #include "intel_cdclk.h"
 #include "intel_display_trace.h"

drivers/gpu/drm/i915/gem/i915_gem_clflush.c

···
 
 #include "display/intel_frontbuffer.h"
 
+#include "i915_config.h"
 #include "i915_drv.h"
 #include "i915_gem_clflush.h"
 #include "i915_sw_fence_work.h"

drivers/gpu/drm/i915/i915_config.c

···
  * Copyright © 2020 Intel Corporation
  */
 
-#include "i915_drv.h"
+#include <linux/kernel.h>
+
+#include "i915_config.h"
+#include "i915_utils.h"
 
 unsigned long
 i915_fence_context_timeout(const struct drm_i915_private *i915, u64 context)

drivers/gpu/drm/i915/i915_config.h

···
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef __I915_CONFIG_H__
+#define __I915_CONFIG_H__
+
+#include <linux/types.h>
+#include <linux/limits.h>
+
+struct drm_i915_private;
+
+unsigned long i915_fence_context_timeout(const struct drm_i915_private *i915,
+					 u64 context);
+
+static inline unsigned long
+i915_fence_timeout(const struct drm_i915_private *i915)
+{
+	return i915_fence_context_timeout(i915, U64_MAX);
+}
+
+#endif /* __I915_CONFIG_H__ */

drivers/gpu/drm/i915/i915_drv.h

···
 
 #define I915_IDLE_ENGINES_TIMEOUT (200) /* in ms */
 
-unsigned long i915_fence_context_timeout(const struct drm_i915_private *i915,
-					 u64 context);
-
-static inline unsigned long
-i915_fence_timeout(const struct drm_i915_private *i915)
-{
-	return i915_fence_context_timeout(i915, U64_MAX);
-}
-
 #define HAS_HW_SAGV_WM(i915) (DISPLAY_VER(i915) >= 13 && !IS_DGFX(i915))
 
 struct i915_virtual_gpu {

drivers/gpu/drm/i915/i915_request.c

···
 #include "gt/intel_rps.h"
 
 #include "i915_active.h"
+#include "i915_config.h"
 #include "i915_deps.h"
 #include "i915_driver.h"
 #include "i915_drv.h"