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-rw-r--r--drivers/video/c2p.c92
1 files changed, 1 insertions, 91 deletions
diff --git a/drivers/video/c2p.c b/drivers/video/c2p.c
index c170fff0d35e..1238c8b912ea 100644
--- a/drivers/video/c2p.c
+++ b/drivers/video/c2p.c
@@ -3,10 +3,6 @@
3 * 3 *
4 * Copyright (C) 2003-2008 Geert Uytterhoeven 4 * Copyright (C) 2003-2008 Geert Uytterhoeven
5 * 5 *
6 * NOTES:
7 * - This code was inspired by Scout's C2P tutorial
8 * - It assumes to run on a big endian system
9 *
10 * This file is subject to the terms and conditions of the GNU General Public 6 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file COPYING in the main directory of this archive 7 * License. See the file COPYING in the main directory of this archive
12 * for more details. 8 * for more details.
@@ -18,82 +14,7 @@
18#include <asm/unaligned.h> 14#include <asm/unaligned.h>
19 15
20#include "c2p.h" 16#include "c2p.h"
21 17#include "c2p_core.h"
22
23 /*
24 * Basic transpose step
25 */
26
27static inline void _transp(u32 d[], unsigned int i1, unsigned int i2,
28 unsigned int shift, u32 mask)
29{
30 u32 t = (d[i1] ^ (d[i2] >> shift)) & mask;
31
32 d[i1] ^= t;
33 d[i2] ^= t << shift;
34}
35
36extern void c2p_unsupported(void);
37
38static inline u32 get_mask(unsigned int n)
39{
40 switch (n) {
41 case 1:
42 return 0x55555555;
43
44 case 2:
45 return 0x33333333;
46
47 case 4:
48 return 0x0f0f0f0f;
49
50 case 8:
51 return 0x00ff00ff;
52
53 case 16:
54 return 0x0000ffff;
55 }
56
57 c2p_unsupported();
58 return 0;
59}
60
61static inline void transp8(u32 d[], unsigned int n, unsigned int m)
62{
63 u32 mask = get_mask(n);
64
65 switch (m) {
66 case 1:
67 /* First n x 1 block */
68 _transp(d, 0, 1, n, mask);
69 /* Second n x 1 block */
70 _transp(d, 2, 3, n, mask);
71 /* Third n x 1 block */
72 _transp(d, 4, 5, n, mask);
73 /* Fourth n x 1 block */
74 _transp(d, 6, 7, n, mask);
75 return;
76
77 case 2:
78 /* First n x 2 block */
79 _transp(d, 0, 2, n, mask);
80 _transp(d, 1, 3, n, mask);
81 /* Second n x 2 block */
82 _transp(d, 4, 6, n, mask);
83 _transp(d, 5, 7, n, mask);
84 return;
85
86 case 4:
87 /* Single n x 4 block */
88 _transp(d, 0, 4, n, mask);
89 _transp(d, 1, 5, n, mask);
90 _transp(d, 2, 6, n, mask);
91 _transp(d, 3, 7, n, mask);
92 return;
93 }
94
95 c2p_unsupported();
96}
97 18
98 19
99 /* 20 /*
@@ -121,17 +42,6 @@ static const int perm_c2p_32x8[8] = { 7, 5, 3, 1, 6, 4, 2, 0 };
121 42
122 43
123 /* 44 /*
124 * Compose two values, using a bitmask as decision value
125 * This is equivalent to (a & mask) | (b & ~mask)
126 */
127
128static inline u32 comp(u32 a, u32 b, u32 mask)
129{
130 return ((a ^ b) & mask) ^ b;
131}
132
133
134 /*
135 * Store a full block of planar data after c2p conversion 45 * Store a full block of planar data after c2p conversion
136 */ 46 */
137 47