xref: /openbmc/u-boot/include/video.h (revision 1b853e47)
1 /*
2  * Video uclass and legacy implementation
3  *
4  * Copyright (c) 2015 Google, Inc
5  *
6  * MPC823 Video Controller
7  * =======================
8  * (C) 2000 by Paolo Scaffardi (arsenio@tin.it)
9  * AIRVENT SAM s.p.a - RIMINI(ITALY)
10  *
11  */
12 
13 #ifndef _VIDEO_H_
14 #define _VIDEO_H_
15 
16 #ifdef CONFIG_DM_VIDEO
17 
18 #include <stdio_dev.h>
19 
20 struct video_uc_platdata {
21 	uint align;
22 	uint size;
23 	ulong base;
24 };
25 
26 enum video_polarity {
27 	VIDEO_ACTIVE_HIGH,	/* Pins are active high */
28 	VIDEO_ACTIVE_LOW,	/* Pins are active low */
29 };
30 
31 /*
32  * Bits per pixel selector. Each value n is such that the bits-per-pixel is
33  * 2 ^ n
34  */
35 enum video_log2_bpp {
36 	VIDEO_BPP1	= 0,
37 	VIDEO_BPP2,
38 	VIDEO_BPP4,
39 	VIDEO_BPP8,
40 	VIDEO_BPP16,
41 	VIDEO_BPP32,
42 };
43 
44 /*
45  * Convert enum video_log2_bpp to bytes and bits. Note we omit the outer
46  * brackets to allow multiplication by fractional pixels.
47  */
48 #define VNBYTES(bpix)	(1 << (bpix)) / 8
49 
50 #define VNBITS(bpix)	(1 << (bpix))
51 
52 /**
53  * struct video_priv - Device information used by the video uclass
54  *
55  * @xsize:	Number of pixel columns (e.g. 1366)
56  * @ysize:	Number of pixels rows (e.g.. 768)
57  * @rot:	Display rotation (0=none, 1=90 degrees clockwise, etc.)
58  * @bpix:	Encoded bits per pixel
59  * @vidconsole_drv_name:	Driver to use for the text console, NULL to
60  *		select automatically
61  * @font_size:	Font size in pixels (0 to use a default value)
62  * @fb:		Frame buffer
63  * @fb_size:	Frame buffer size
64  * @line_length:	Length of each frame buffer line, in bytes
65  * @colour_fg:	Foreground colour (pixel value)
66  * @colour_bg:	Background colour (pixel value)
67  * @flush_dcache:	true to enable flushing of the data cache after
68  *		the LCD is updated
69  * @cmap:	Colour map for 8-bit-per-pixel displays
70  */
71 struct video_priv {
72 	/* Things set up by the driver: */
73 	ushort xsize;
74 	ushort ysize;
75 	ushort rot;
76 	enum video_log2_bpp bpix;
77 	const char *vidconsole_drv_name;
78 	int font_size;
79 
80 	/*
81 	 * Things that are private to the uclass: don't use these in the
82 	 * driver
83 	 */
84 	void *fb;
85 	int fb_size;
86 	int line_length;
87 	int colour_fg;
88 	int colour_bg;
89 	bool flush_dcache;
90 	ushort *cmap;
91 };
92 
93 /* Placeholder - there are no video operations at present */
94 struct video_ops {
95 };
96 
97 #define video_get_ops(dev)        ((struct video_ops *)(dev)->driver->ops)
98 
99 /**
100  * video_reserve() - Reserve frame-buffer memory for video devices
101  *
102  * Note: This function is for internal use.
103  *
104  * This uses the uclass platdata's @size and @align members to figure out
105  * a size and position for each frame buffer as part of the pre-relocation
106  * process of determining the post-relocation memory layout.
107  *
108  * gd->video_top is set to the initial value of *@addrp and gd->video_bottom
109  * is set to the final value.
110  *
111  * @addrp:	On entry, the top of available memory. On exit, the new top,
112  *		after allocating the required memory.
113  * @return 0
114  */
115 int video_reserve(ulong *addrp);
116 
117 /**
118  * video_clear() - Clear a device's frame buffer to background color.
119  *
120  * @dev:	Device to clear
121  */
122 void video_clear(struct udevice *dev);
123 
124 /**
125  * video_sync() - Sync a device's frame buffer with its hardware
126  *
127  * Some frame buffers are cached or have a secondary frame buffer. This
128  * function syncs these up so that the current contents of the U-Boot frame
129  * buffer are displayed to the user.
130  *
131  * @dev:	Device to sync
132  */
133 void video_sync(struct udevice *vid);
134 
135 /**
136  * video_sync_all() - Sync all devices' frame buffers with there hardware
137  *
138  * This calls video_sync() on all active video devices.
139  */
140 void video_sync_all(void);
141 
142 /**
143  * video_bmp_display() - Display a BMP file
144  *
145  * @dev:	Device to display the bitmap on
146  * @bmp_image:	Address of bitmap image to display
147  * @x:		X position in pixels from the left
148  * @y:		Y position in pixels from the top
149  * @align:	true to adjust the coordinates to centre the image. If false
150  *		the coordinates are used as is. If true:
151  *
152  *		- if a coordinate is 0x7fff then the image will be centred in
153  *		  that direction
154  *		- if a coordinate is -ve then it will be offset to the
155  *		  left/top of the centre by that many pixels
156  *		- if a coordinate is positive it will be used unchnaged.
157  * @return 0 if OK, -ve on error
158  */
159 int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
160 		      bool align);
161 
162 /**
163  * video_get_xsize() - Get the width of the display in pixels
164  *
165  * @dev:	Device to check
166  * @return device frame buffer width in pixels
167  */
168 int video_get_xsize(struct udevice *dev);
169 
170 /**
171  * video_get_ysize() - Get the height of the display in pixels
172  *
173  * @dev:	Device to check
174  * @return device frame buffer height in pixels
175  */
176 int video_get_ysize(struct udevice *dev);
177 
178 /**
179  * Set whether we need to flush the dcache when changing the image. This
180  * defaults to off.
181  *
182  * @param flush		non-zero to flush cache after update, 0 to skip
183  */
184 void video_set_flush_dcache(struct udevice *dev, bool flush);
185 
186 #endif /* CONFIG_DM_VIDEO */
187 
188 #ifndef CONFIG_DM_VIDEO
189 
190 /* Video functions */
191 
192 struct stdio_dev;
193 
194 int	video_init(void *videobase);
195 void	video_putc(struct stdio_dev *dev, const char c);
196 void	video_puts(struct stdio_dev *dev, const char *s);
197 
198 /**
199  * Display a BMP format bitmap on the screen
200  *
201  * @param bmp_image	Address of BMP image
202  * @param x		X position to draw image
203  * @param y		Y position to draw image
204  */
205 int video_display_bitmap(ulong bmp_image, int x, int y);
206 
207 /**
208  * Get the width of the screen in pixels
209  *
210  * @return width of screen in pixels
211  */
212 int video_get_pixel_width(void);
213 
214 /**
215  * Get the height of the screen in pixels
216  *
217  * @return height of screen in pixels
218  */
219 int video_get_pixel_height(void);
220 
221 /**
222  * Get the number of text lines/rows on the screen
223  *
224  * @return number of rows
225  */
226 int video_get_screen_rows(void);
227 
228 /**
229  * Get the number of text columns on the screen
230  *
231  * @return number of columns
232  */
233 int video_get_screen_columns(void);
234 
235 /**
236  * Set the position of the text cursor
237  *
238  * @param col	Column to place cursor (0 = left side)
239  * @param row	Row to place cursor (0 = top line)
240  */
241 void video_position_cursor(unsigned col, unsigned row);
242 
243 /* Clear the display */
244 void video_clear(void);
245 
246 #if defined(CONFIG_FORMIKE)
247 int kwh043st20_f01_spi_startup(unsigned int bus, unsigned int cs,
248 	unsigned int max_hz, unsigned int spi_mode);
249 #endif
250 #if defined(CONFIG_LG4573)
251 int lg4573_spi_startup(unsigned int bus, unsigned int cs,
252 	unsigned int max_hz, unsigned int spi_mode);
253 #endif
254 
255 /*
256  * video_get_info_str() - obtain a board string: type, speed, etc.
257  *
258  * This is called if CONFIG_CONSOLE_EXTRA_INFO is enabled.
259  *
260  * line_number:	location to place info string beside logo
261  * info:	buffer for info string (empty if nothing to display on this
262  * line)
263  */
264 void video_get_info_str(int line_number, char *info);
265 
266 #endif /* CONFIG_DM_VIDEO */
267 
268 #endif
269