drm/xe/display: Implement display support

As for display, the intent is to share the display code with the i915
driver so that there is maximum reuse there.

We do this by recompiling i915/display code twice.
Now that i915 has been adapted to support the Xe build, we can add
the xe/display support.

This initial work is a collaboration of many people and unfortunately
this squashed patch won't fully honor the proper credits.
But let's try to add a few from the squashed patches:

Co-developed-by: Matthew Brost <matthew.brost@intel.com>
Co-developed-by: Jani Nikula <jani.nikula@intel.com>
Co-developed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Co-developed-by: Matt Roper <matthew.d.roper@intel.com>
Co-developed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Co-developed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Co-developed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

1 files changed, 72 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/xe_display.h b/drivers/gpu/drm/xe/xe_display.h
new file mode 100644
index 000000000000..710e56180b52
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_display.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef _XE_DISPLAY_H_
+#define _XE_DISPLAY_H_
+
+#include "xe_device.h"
+
+struct drm_driver;
+
+#if IS_ENABLED(CONFIG_DRM_XE_DISPLAY)
+
+bool xe_display_driver_probe_defer(struct pci_dev *pdev);
+void xe_display_driver_set_hooks(struct drm_driver *driver);
+void xe_display_driver_remove(struct xe_device *xe);
+
+int xe_display_create(struct xe_device *xe);
+
+void xe_display_probe(struct xe_device *xe);
+
+int xe_display_init_nommio(struct xe_device *xe);
+int xe_display_init_noirq(struct xe_device *xe);
+int xe_display_init_noaccel(struct xe_device *xe);
+int xe_display_init(struct xe_device *xe);
+void xe_display_fini(struct xe_device *xe);
+
+void xe_display_register(struct xe_device *xe);
+void xe_display_unregister(struct xe_device *xe);
+
+void xe_display_irq_handler(struct xe_device *xe, u32 master_ctl);
+void xe_display_irq_enable(struct xe_device *xe, u32 gu_misc_iir);
+void xe_display_irq_reset(struct xe_device *xe);
+void xe_display_irq_postinstall(struct xe_device *xe, struct xe_gt *gt);
+
+void xe_display_pm_suspend(struct xe_device *xe);
+void xe_display_pm_suspend_late(struct xe_device *xe);
+void xe_display_pm_resume_early(struct xe_device *xe);
+void xe_display_pm_resume(struct xe_device *xe);
+
+#else
+
+static inline int xe_display_driver_probe_defer(struct pci_dev *pdev) { return 0; }
+static inline void xe_display_driver_set_hooks(struct drm_driver *driver) { }
+static inline void xe_display_driver_remove(struct xe_device *xe) {}
+
+static inline int xe_display_create(struct xe_device *xe) { return 0; }
+
+static inline void xe_display_probe(struct xe_device *xe) { }
+
+static inline int xe_display_init_nommio(struct xe_device *xe) { return 0; }
+static inline int xe_display_init_noirq(struct xe_device *xe) { return 0; }
+static inline int xe_display_init_noaccel(struct xe_device *xe) { return 0; }
+static inline int xe_display_init(struct xe_device *xe) { return 0; }
+static inline void xe_display_fini(struct xe_device *xe) {}
+
+static inline void xe_display_register(struct xe_device *xe) {}
+static inline void xe_display_unregister(struct xe_device *xe) {}
+
+static inline void xe_display_irq_handler(struct xe_device *xe, u32 master_ctl) {}
+static inline void xe_display_irq_enable(struct xe_device *xe, u32 gu_misc_iir) {}
+static inline void xe_display_irq_reset(struct xe_device *xe) {}
+static inline void xe_display_irq_postinstall(struct xe_device *xe, struct xe_gt *gt) {}
+
+static inline void xe_display_pm_suspend(struct xe_device *xe) {}
+static inline void xe_display_pm_suspend_late(struct xe_device *xe) {}
+static inline void xe_display_pm_resume_early(struct xe_device *xe) {}
+static inline void xe_display_pm_resume(struct xe_device *xe) {}
+
+#endif /* CONFIG_DRM_XE_DISPLAY */
+#endif /* _XE_DISPLAY_H_ */