[PATCH v6 9/9] fixup! drm/xe/display: Implement display support

[Jouni Högander]

Add Xe specific code for intel_fb.c

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
Acked-by: Jani Nikula <jani.nikula at intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/xe/Makefile              |  1 +
 drivers/gpu/drm/xe/display/intel_fb_bo.c | 74 ++++++++++++++++++++++++
 drivers/gpu/drm/xe/display/intel_fb_bo.h | 24 ++++++++
 3 files changed, 99 insertions(+)
 create mode 100644 drivers/gpu/drm/xe/display/intel_fb_bo.c
 create mode 100644 drivers/gpu/drm/xe/display/intel_fb_bo.h

diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index f7894ae68e00..537828655da9 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -174,6 +174,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
 	display/xe_display_misc.o \
 	display/xe_dsb_buffer.o \
 	display/intel_fbdev_fb.o \
+	display/intel_fb_bo.o \
 	display/ext/i915_irq.o \
 	display/ext/i915_utils.o
 
diff --git a/drivers/gpu/drm/xe/display/intel_fb_bo.c b/drivers/gpu/drm/xe/display/intel_fb_bo.c
new file mode 100644
index 000000000000..b21da7b745a5
--- /dev/null
+++ b/drivers/gpu/drm/xe/display/intel_fb_bo.c
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include <drm/drm_modeset_helper.h>
+
+#include "i915_drv.h"
+#include "intel_display_types.h"
+#include "intel_fb_bo.h"
+
+void intel_fb_bo_framebuffer_fini(struct xe_bo *bo)
+{
+	if (bo->flags & XE_BO_CREATE_PINNED_BIT) {
+		/* Unpin our kernel fb first */
+		xe_bo_lock(bo, false);
+		xe_bo_unpin(bo);
+		xe_bo_unlock(bo);
+	}
+	xe_bo_put(bo);
+}
+
+int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,
+				 struct xe_bo *bo,
+				 struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct drm_i915_private *i915 = to_i915(bo->ttm.base.dev);
+	int ret;
+
+	xe_bo_get(bo);
+
+	ret = ttm_bo_reserve(&bo->ttm, true, false, NULL);
+	if (ret)
+		return ret;
+
+	if (!(bo->flags & XE_BO_SCANOUT_BIT)) {
+		/*
+		 * XE_BO_SCANOUT_BIT should ideally be set at creation, or is
+		 * automatically set when creating FB. We cannot change caching
+		 * mode when the boect is VM_BINDed, so we can only set
+		 * coherency with display when unbound.
+		 */
+		if (XE_IOCTL_DBG(i915, !list_empty(&bo->ttm.base.gpuva.list))) {
+			ttm_bo_unreserve(&bo->ttm);
+			return -EINVAL;
+		}
+		bo->flags |= XE_BO_SCANOUT_BIT;
+	}
+	ttm_bo_unreserve(&bo->ttm);
+
+	return ret;
+}
+
+struct xe_bo *intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,
+					  struct drm_file *filp,
+					  const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct drm_i915_gem_object *bo;
+	struct drm_gem_object *gem = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
+
+	if (!gem)
+		return ERR_PTR(-ENOENT);
+
+	bo = gem_to_xe_bo(gem);
+	/* Require vram placement or dma-buf import */
+	if (IS_DGFX(i915) &&
+	    !xe_bo_can_migrate(gem_to_xe_bo(gem), XE_PL_VRAM0) &&
+	    bo->ttm.type != ttm_bo_type_sg) {
+		drm_gem_object_put(gem);
+		return ERR_PTR(-EREMOTE);
+	}
+
+	return bo;
+}
diff --git a/drivers/gpu/drm/xe/display/intel_fb_bo.h b/drivers/gpu/drm/xe/display/intel_fb_bo.h
new file mode 100644
index 000000000000..5d365b925b7a
--- /dev/null
+++ b/drivers/gpu/drm/xe/display/intel_fb_bo.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef __INTEL_FB_BO_H__
+#define __INTEL_FB_BO_H__
+
+struct drm_file;
+struct drm_mode_fb_cmd2;
+struct drm_i915_private;
+struct intel_framebuffer;
+struct xe_bo;
+
+void intel_fb_bo_framebuffer_fini(struct xe_bo *bo);
+int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,
+				 struct xe_bo *bo,
+				 struct drm_mode_fb_cmd2 *mode_cmd);
+
+struct xe_bo *intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,
+					  struct drm_file *filp,
+					  const struct drm_mode_fb_cmd2 *mode_cmd);
+
+#endif
-- 
2.34.1