[PATCH 2/5] drm/i915/overlay: add intel_overlay_available() and use it

[Jani Nikula <jani.nikula@intel.com>]

Avoid accessing struct intel_display members directly from
i915_getparam_ioctl(). Add intel_overlay_available() function to provide
the information for I915_PARAM_HAS_OVERLAY.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_overlay.c | 5 +++++
 drivers/gpu/drm/i915/display/intel_overlay.h | 5 +++++
 drivers/gpu/drm/i915/i915_getparam.c         | 5 +++--
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_overlay.c b/drivers/gpu/drm/i915/display/intel_overlay.c
index 57eaf81651c4..ca30fff61876 100644
--- a/drivers/gpu/drm/i915/display/intel_overlay.c
+++ b/drivers/gpu/drm/i915/display/intel_overlay.c
@@ -1438,6 +1438,11 @@ void intel_overlay_setup(struct intel_display *display)
 	kfree(overlay);
 }
 
+bool intel_overlay_available(struct intel_display *display)
+{
+	return display->overlay;
+}
+
 void intel_overlay_cleanup(struct intel_display *display)
 {
 	struct intel_overlay *overlay;
diff --git a/drivers/gpu/drm/i915/display/intel_overlay.h b/drivers/gpu/drm/i915/display/intel_overlay.h
index dc885edf39e6..45a42fce754e 100644
--- a/drivers/gpu/drm/i915/display/intel_overlay.h
+++ b/drivers/gpu/drm/i915/display/intel_overlay.h
@@ -18,6 +18,7 @@ struct intel_overlay_snapshot;
 
 #ifdef I915
 void intel_overlay_setup(struct intel_display *display);
+bool intel_overlay_available(struct intel_display *display);
 void intel_overlay_cleanup(struct intel_display *display);
 int intel_overlay_switch_off(struct intel_overlay *overlay);
 int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
@@ -29,6 +30,10 @@ void intel_overlay_reset(struct intel_display *display);
 static inline void intel_overlay_setup(struct intel_display *display)
 {
 }
+static inline bool intel_overlay_available(struct intel_display *display)
+{
+	return false;
+}
 static inline void intel_overlay_cleanup(struct intel_display *display)
 {
 }
diff --git a/drivers/gpu/drm/i915/i915_getparam.c b/drivers/gpu/drm/i915/i915_getparam.c
index a62405787e77..be8149e46281 100644
--- a/drivers/gpu/drm/i915/i915_getparam.c
+++ b/drivers/gpu/drm/i915/i915_getparam.c
@@ -2,9 +2,9 @@
  * SPDX-License-Identifier: MIT
  */
 
+#include "display/intel_overlay.h"
 #include "gem/i915_gem_mman.h"
 #include "gt/intel_engine_user.h"
-
 #include "pxp/intel_pxp.h"
 
 #include "i915_cmd_parser.h"
@@ -16,6 +16,7 @@ int i915_getparam_ioctl(struct drm_device *dev, void *data,
 			struct drm_file *file_priv)
 {
 	struct drm_i915_private *i915 = to_i915(dev);
+	struct intel_display *display = &i915->display;
 	struct pci_dev *pdev = to_pci_dev(dev->dev);
 	const struct sseu_dev_info *sseu = &to_gt(i915)->info.sseu;
 	drm_i915_getparam_t *param = data;
@@ -38,7 +39,7 @@ int i915_getparam_ioctl(struct drm_device *dev, void *data,
 		value = to_gt(i915)->ggtt->num_fences;
 		break;
 	case I915_PARAM_HAS_OVERLAY:
-		value = !!i915->display.overlay;
+		value = intel_overlay_available(display);
 		break;
 	case I915_PARAM_HAS_BSD:
 		value = !!intel_engine_lookup_user(i915,
-- 
2.39.5