1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/gpu/drm/armada/armada_fbdev.c b/drivers/gpu/drm/armada/armada_fbdev.c
new file mode 100644
index 000000000000..8bbae94804f8
--- /dev/null
+++ b/drivers/gpu/drm/armada/armada_fbdev.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2012 Russell King
+ *  Written from the i915 driver.
+ */
+
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_print.h>
+
+#include "armada_crtc.h"
+#include "armada_drm.h"
+#include "armada_fb.h"
+#include "armada_gem.h"
+
+static void armada_fbdev_fb_destroy(struct fb_info *info)
+{
+	struct drm_fb_helper *fbh = info->par;
+
+	drm_fb_helper_fini(fbh);
+
+	fbh->fb->funcs->destroy(fbh->fb);
+
+	drm_client_release(&fbh->client);
+}
+
+static const struct fb_ops armada_fb_ops = {
+	.owner		= THIS_MODULE,
+	FB_DEFAULT_IOMEM_OPS,
+	DRM_FB_HELPER_DEFAULT_OPS,
+	.fb_destroy	= armada_fbdev_fb_destroy,
+};
+
+static const struct drm_fb_helper_funcs armada_fbdev_helper_funcs;
+
+int armada_fbdev_driver_fbdev_probe(struct drm_fb_helper *fbh,
+				    struct drm_fb_helper_surface_size *sizes)
+{
+	struct drm_device *dev = fbh->dev;
+	struct fb_info *info = fbh->info;
+	struct drm_mode_fb_cmd2 mode;
+	struct armada_framebuffer *dfb;
+	struct armada_gem_object *obj;
+	int size, ret;
+	void *ptr;
+
+	memset(&mode, 0, sizeof(mode));
+	mode.width = sizes->surface_width;
+	mode.height = sizes->surface_height;
+	mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
+	mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+					sizes->surface_depth);
+
+	size = mode.pitches[0] * mode.height;
+	obj = armada_gem_alloc_private_object(dev, size);
+	if (!obj) {
+		DRM_ERROR("failed to allocate fb memory\n");
+		return -ENOMEM;
+	}
+
+	ret = armada_gem_linear_back(dev, obj);
+	if (ret) {
+		drm_gem_object_put(&obj->obj);
+		return ret;
+	}
+
+	ptr = armada_gem_map_object(dev, obj);
+	if (!ptr) {
+		drm_gem_object_put(&obj->obj);
+		return -ENOMEM;
+	}
+
+	dfb = armada_framebuffer_create(dev,
+					drm_get_format_info(dev, mode.pixel_format,
+							    mode.modifier[0]),
+					&mode, obj);
+
+	/*
+	 * A reference is now held by the framebuffer object if
+	 * successful, otherwise this drops the ref for the error path.
+	 */
+	drm_gem_object_put(&obj->obj);
+
+	if (IS_ERR(dfb))
+		return PTR_ERR(dfb);
+
+	info->fbops = &armada_fb_ops;
+	info->fix.smem_start = obj->phys_addr;
+	info->fix.smem_len = obj->obj.size;
+	info->screen_size = obj->obj.size;
+	info->screen_base = ptr;
+	fbh->funcs = &armada_fbdev_helper_funcs;
+	fbh->fb = &dfb->fb;
+
+	drm_fb_helper_fill_info(info, fbh, sizes);
+
+	DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
+		dfb->fb.width, dfb->fb.height, dfb->fb.format->cpp[0] * 8,
+		(unsigned long long)obj->phys_addr);
+
+	return 0;
+}