1 // SPDX-License-Identifier: GPL-2.0-or-later
4  * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com>
8  * Simple-Framebuffer support
9  * Create a platform-device for any available boot framebuffer. The
10  * simple-framebuffer platform device is already available on DT systems, so
12  * platform device compatible with the "simple-framebuffer" DT object. If
14  * "vesa-framebuffer", "efi-framebuffer" or "platform-framebuffer" device and
16  * to pick these devices up without messing with simple-framebuffer drivers.
19  * If CONFIG_SYSFB_SIMPLEFB is not selected, never register "simple-framebuffer"
23  * TODO: We set the dev_id field of all platform-devices to 0. This allows
38 static struct platform_device *pd;  variable
46 	if (IS_ERR_OR_NULL(pd))  in sysfb_unregister()
49 	platform_device_unregister(pd);  in sysfb_unregister()
50 	pd = NULL;  in sysfb_unregister()
56  * sysfb_disable() - disable the Generic System Framebuffers support
57  * @dev:	the device to check if non-NULL
115 			return ERR_PTR(-ENODEV);  in sysfb_parent_dev()
117 		return &pdev->dev;  in sysfb_parent_dev()
146 	/* try to create a simple-framebuffer device */  in sysfb_init()
149 		pd = sysfb_create_simplefb(si, &mode, parent);  in sysfb_init()
150 		if (!IS_ERR(pd))  in sysfb_init()
155 	if (si->orig_video_isVGA == VIDEO_TYPE_EFI)  in sysfb_init()
156 		name = "efi-framebuffer";  in sysfb_init()
157 	else if (si->orig_video_isVGA == VIDEO_TYPE_VLFB)  in sysfb_init()
158 		name = "vesa-framebuffer";  in sysfb_init()
159 	else if (si->orig_video_isVGA == VIDEO_TYPE_VGAC)  in sysfb_init()
160 		name = "vga-framebuffer";  in sysfb_init()
161 	else if (si->orig_video_isVGA == VIDEO_TYPE_EGAC)  in sysfb_init()
162 		name = "ega-framebuffer";  in sysfb_init()
164 		name = "platform-framebuffer";  in sysfb_init()
166 	pd = platform_device_alloc(name, 0);  in sysfb_init()
167 	if (!pd) {  in sysfb_init()
168 		ret = -ENOMEM;  in sysfb_init()
172 	pd->dev.parent = parent;  in sysfb_init()
174 	sysfb_set_efifb_fwnode(pd);  in sysfb_init()
176 	ret = platform_device_add_data(pd, si, sizeof(*si));  in sysfb_init()
180 	ret = platform_device_add(pd);  in sysfb_init()
186 	platform_device_put(pd);  in sysfb_init()