[Intel-xe] [PATCH v3 4/9] fixup! drm/xe/display: Implement display support

[Jouni Högander]

Add xe specific code for intel_fbdev.

v2:
  - Add SPDX-License tag
  - Remove accidentally added ifdef I915

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/xe/Makefile                 |   1 +
 drivers/gpu/drm/xe/display/intel_fbdev_fb.c | 102 ++++++++++++++++++++
 drivers/gpu/drm/xe/display/intel_fbdev_fb.h |  21 ++++
 3 files changed, 124 insertions(+)
 create mode 100644 drivers/gpu/drm/xe/display/intel_fbdev_fb.c
 create mode 100644 drivers/gpu/drm/xe/display/intel_fbdev_fb.h

diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index cb41b4fead08..8493568954c4 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -153,6 +153,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
 	display/xe_plane_initial.o \
 	display/xe_display_rps.o \
 	display/xe_display_misc.o \
+	display/intel_fbdev_fb.o \
 	display/ext/i915_irq.o \
 	display/ext/i915_utils.o
 
diff --git a/drivers/gpu/drm/xe/display/intel_fbdev_fb.c b/drivers/gpu/drm/xe/display/intel_fbdev_fb.c
new file mode 100644
index 000000000000..961b26e267ec
--- /dev/null
+++ b/drivers/gpu/drm/xe/display/intel_fbdev_fb.c
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#include <drm/drm_fb_helper.h>
+
+#include "xe_gt.h"
+#include "xe_ttm_stolen_mgr.h"
+
+#include "i915_drv.h"
+#include "intel_display_types.h"
+
+struct drm_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
+			 struct drm_fb_helper_surface_size *sizes)
+{
+	struct drm_framebuffer *fb;
+	struct drm_device *dev = helper->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_mode_fb_cmd2 mode_cmd = {};
+	struct drm_i915_gem_object *obj;
+	int size;
+
+	/* we don't do packed 24bpp */
+	if (sizes->surface_bpp == 24)
+		sizes->surface_bpp = 32;
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+
+	mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
+				    DIV_ROUND_UP(sizes->surface_bpp, 8), XE_PAGE_SIZE);
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	size = mode_cmd.pitches[0] * mode_cmd.height;
+	size = PAGE_ALIGN(size);
+	obj = ERR_PTR(-ENODEV);
+
+	if (!IS_DGFX(dev_priv)) {
+		obj = xe_bo_create_pin_map(dev_priv, xe_device_get_root_tile(dev_priv),
+					   NULL, size,
+					   ttm_bo_type_kernel, XE_BO_SCANOUT_BIT |
+					   XE_BO_CREATE_STOLEN_BIT |
+					   XE_BO_CREATE_PINNED_BIT);
+		if (!IS_ERR(obj))
+			drm_info(&dev_priv->drm, "Allocated fbdev into stolen\n");
+		else
+			drm_info(&dev_priv->drm, "Allocated fbdev into stolen failed: %li\n", PTR_ERR(obj));
+	}
+	if (IS_ERR(obj)) {
+		obj = xe_bo_create_pin_map(dev_priv, xe_device_get_root_tile(dev_priv), NULL, size,
+					  ttm_bo_type_kernel, XE_BO_SCANOUT_BIT |
+					  XE_BO_CREATE_VRAM_IF_DGFX(xe_device_get_root_tile(dev_priv)) |
+					  XE_BO_CREATE_PINNED_BIT);
+	}
+
+	if (IS_ERR(obj)) {
+		drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n", obj);
+		fb = ERR_PTR(-ENOMEM);
+		goto err;
+	}
+
+	fb = intel_framebuffer_create(obj, &mode_cmd);
+	if (IS_ERR(fb)) {
+		xe_bo_unpin_map_no_vm(obj);
+		goto err;
+	}
+
+	drm_gem_object_put(intel_bo_to_drm_bo(obj));
+	return fb;
+
+err:
+	return fb;
+}
+
+int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info,
+			      struct drm_i915_gem_object *obj, struct i915_vma *vma)
+{
+	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
+
+	if (!(obj->flags & XE_BO_CREATE_SYSTEM_BIT)) {
+		if (obj->flags & XE_BO_CREATE_STOLEN_BIT)
+			info->fix.smem_start = xe_ttm_stolen_io_offset(obj, 0);
+		else
+			info->fix.smem_start =
+				pci_resource_start(pdev, 2) +
+				xe_bo_addr(obj, 0, XE_PAGE_SIZE);
+
+		info->fix.smem_len = obj->ttm.base.size;
+	} else {
+		/* XXX: Pure fiction, as the BO may not be physically accessible.. */
+		info->fix.smem_start = 0;
+		info->fix.smem_len = obj->ttm.base.size;
+	}
+	XE_WARN_ON(iosys_map_is_null(&obj->vmap));
+
+	info->screen_base = obj->vmap.vaddr_iomem;
+	info->screen_size = intel_bo_to_drm_bo(obj)->size;
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/xe/display/intel_fbdev_fb.h b/drivers/gpu/drm/xe/display/intel_fbdev_fb.h
new file mode 100644
index 000000000000..ea186772e0bb
--- /dev/null
+++ b/drivers/gpu/drm/xe/display/intel_fbdev_fb.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef __INTEL_FBDEV_FB_H__
+#define __INTEL_FBDEV_FB_H__
+
+struct drm_fb_helper;
+struct drm_fb_helper_surface_size;
+struct drm_i915_gem_object;
+struct drm_i915_private;
+struct fb_info;
+struct i915_vma;
+
+struct drm_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
+			 struct drm_fb_helper_surface_size *sizes);
+int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info,
+			      struct drm_i915_gem_object *obj, struct i915_vma *vma);
+
+#endif
-- 
2.34.1