1 /*
2  * simplefb.h - Simple Framebuffer Device
3  *
4  * Copyright (C) 2013 David Herrmann <dh.herrmann@gmail.com>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11 
12 #ifndef __PLATFORM_DATA_SIMPLEFB_H__
13 #define __PLATFORM_DATA_SIMPLEFB_H__
14 
15 #include <drm/drm_fourcc.h>
16 #include <linux/fb.h>
17 #include <linux/kernel.h>
18 
19 /* format array, use it to initialize a "struct simplefb_format" array */
20 #define SIMPLEFB_FORMATS \
21 { \
22 	{ "r5g6b5", 16, {11, 5}, {5, 6}, {0, 5}, {0, 0}, DRM_FORMAT_RGB565 }, \
23 	{ "x1r5g5b5", 16, {10, 5}, {5, 5}, {0, 5}, {0, 0}, DRM_FORMAT_XRGB1555 }, \
24 	{ "a1r5g5b5", 16, {10, 5}, {5, 5}, {0, 5}, {15, 1}, DRM_FORMAT_ARGB1555 }, \
25 	{ "r8g8b8", 24, {16, 8}, {8, 8}, {0, 8}, {0, 0}, DRM_FORMAT_RGB888 }, \
26 	{ "x8r8g8b8", 32, {16, 8}, {8, 8}, {0, 8}, {0, 0}, DRM_FORMAT_XRGB8888 }, \
27 	{ "a8r8g8b8", 32, {16, 8}, {8, 8}, {0, 8}, {24, 8}, DRM_FORMAT_ARGB8888 }, \
28 	{ "a8b8g8r8", 32, {0, 8}, {8, 8}, {16, 8}, {24, 8}, DRM_FORMAT_ABGR8888 }, \
29 	{ "x2r10g10b10", 32, {20, 10}, {10, 10}, {0, 10}, {0, 0}, DRM_FORMAT_XRGB2101010 }, \
30 	{ "a2r10g10b10", 32, {20, 10}, {10, 10}, {0, 10}, {30, 2}, DRM_FORMAT_ARGB2101010 }, \
31 }
32 
33 /*
34  * Data-Format for Simple-Framebuffers
35  * @name: unique 0-terminated name that can be used to identify the mode
36  * @red,green,blue: Offsets and sizes of the single RGB parts
37  * @transp: Offset and size of the alpha bits. length=0 means no alpha
38  * @fourcc: 32bit DRM four-CC code (see drm_fourcc.h)
39  */
40 struct simplefb_format {
41 	const char *name;
42 	u32 bits_per_pixel;
43 	struct fb_bitfield red;
44 	struct fb_bitfield green;
45 	struct fb_bitfield blue;
46 	struct fb_bitfield transp;
47 	u32 fourcc;
48 };
49 
50 /*
51  * Simple-Framebuffer description
52  * If the arch-boot code creates simple-framebuffers without DT support, it
53  * can pass the width, height, stride and format via this platform-data object.
54  * The framebuffer location must be given as IORESOURCE_MEM resource.
55  * @format must be a format as described in "struct simplefb_format" above.
56  */
57 struct simplefb_platform_data {
58 	u32 width;
59 	u32 height;
60 	u32 stride;
61 	const char *format;
62 };
63 
64 #endif /* __PLATFORM_DATA_SIMPLEFB_H__ */
65