1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (c) 2013 Google, Inc
4 */
5
6#include <common.h>
7#include <dm.h>
8#include <fdtdec.h>
9#include <log.h>
10#include <video.h>
11#include <asm/global_data.h>
12#include <asm/sdl.h>
13#include <asm/state.h>
14#include <asm/u-boot-sandbox.h>
15#include <dm/device-internal.h>
16#include <dm/test.h>
17
18DECLARE_GLOBAL_DATA_PTR;
19
20enum {
21	/* Default LCD size we support */
22	LCD_MAX_WIDTH		= 1366,
23	LCD_MAX_HEIGHT		= 768,
24};
25
26static int sandbox_sdl_probe(struct udevice *dev)
27{
28	struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
29	struct sandbox_sdl_plat *plat = dev_get_plat(dev);
30	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
31	struct sandbox_state *state = state_get_current();
32	int ret;
33
34	ret = sandbox_sdl_init_display(plat->xres, plat->yres, plat->bpix,
35				       state->double_lcd);
36	if (ret) {
37		puts("LCD init failed\n");
38		return ret;
39	}
40	uc_priv->xsize = plat->xres;
41	uc_priv->ysize = plat->yres;
42	uc_priv->bpix = plat->bpix;
43	uc_priv->rot = plat->rot;
44	uc_priv->vidconsole_drv_name = plat->vidconsole_drv_name;
45	uc_priv->font_size = plat->font_size;
46	if (IS_ENABLED(CONFIG_VIDEO_COPY))
47		uc_plat->copy_base = uc_plat->base + uc_plat->size / 2;
48
49	return 0;
50}
51
52static void set_bpp(struct udevice *dev, enum video_log2_bpp l2bpp)
53{
54	struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
55	struct sandbox_sdl_plat *plat = dev_get_plat(dev);
56
57	plat->bpix = l2bpp;
58
59	uc_plat->size = plat->xres * plat->yres * VNBYTES(plat->bpix);
60
61	/*
62	 * Set up to the maximum size we'll ever need. This is a strange case.
63	 * The video memory is allocated by video_post_bind() called from
64	 * board_init_r(). If a test changes the reoslution so it needs more
65	 * memory later (with sandbox_sdl_set_bpp()), it is too late to make
66	 * the frame buffer larger.
67	 *
68	 * So use a maximum size here.
69	 */
70	uc_plat->size = max(uc_plat->size, 1920U * 1080 * VNBYTES(VIDEO_BPP32));
71
72	/* Allow space for two buffers, the lower one being the copy buffer */
73	log_debug("Frame buffer size %x\n", uc_plat->size);
74
75	/*
76	 * If a copy framebuffer is used, double the size and use the last half
77	 * as the copy, with the first half as the normal frame buffer.
78	 */
79	if (IS_ENABLED(CONFIG_VIDEO_COPY))
80		uc_plat->size *= 2;
81}
82
83int sandbox_sdl_set_bpp(struct udevice *dev, enum video_log2_bpp l2bpp)
84{
85	struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
86	int ret;
87
88	if (device_active(dev))
89		return -EINVAL;
90	sandbox_sdl_remove_display();
91
92	uc_plat->hide_logo = true;
93	set_bpp(dev, l2bpp);
94
95	ret = device_probe(dev);
96	if (ret)
97		return ret;
98
99	return 0;
100}
101
102static int sandbox_sdl_remove(struct udevice *dev)
103{
104	/*
105	 * Removing the display it a bit annoying when running unit tests, since
106	 * they remove all devices. It is nice to be able to see what the test
107	 * wrote onto the display. So this comment is just here to show how to
108	 * do it, if we want to make it optional one day.
109	 *
110	 * sandbox_sdl_remove_display();
111	 */
112	return 0;
113}
114
115static int sandbox_sdl_bind(struct udevice *dev)
116{
117	struct sandbox_sdl_plat *plat = dev_get_plat(dev);
118	enum video_log2_bpp l2bpp;
119	int ret = 0;
120
121	plat->xres = dev_read_u32_default(dev, "xres", LCD_MAX_WIDTH);
122	plat->yres = dev_read_u32_default(dev, "yres", LCD_MAX_HEIGHT);
123	l2bpp = dev_read_u32_default(dev, "log2-depth", VIDEO_BPP16);
124	plat->rot = dev_read_u32_default(dev, "rotate", 0);
125
126	set_bpp(dev, l2bpp);
127
128	return ret;
129}
130
131static const struct udevice_id sandbox_sdl_ids[] = {
132	{ .compatible = "sandbox,lcd-sdl" },
133	{ }
134};
135
136U_BOOT_DRIVER(sandbox_lcd_sdl) = {
137	.name	= "sandbox_lcd_sdl",
138	.id	= UCLASS_VIDEO,
139	.of_match = sandbox_sdl_ids,
140	.bind	= sandbox_sdl_bind,
141	.probe	= sandbox_sdl_probe,
142	.remove	= sandbox_sdl_remove,
143	.plat_auto	= sizeof(struct sandbox_sdl_plat),
144};
145