1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
*/
#include <drm/drm_print.h>
#include "sti_awg_utils.h"
#define AWG_DELAY (-5)
#define AWG_OPCODE_OFFSET 10
#define AWG_MAX_ARG 0x3ff
enum opcode {
SET,
RPTSET,
RPLSET,
SKIP,
STOP,
REPEAT,
REPLAY,
JUMP,
HOLD,
};
static int awg_generate_instr(enum opcode opcode,
long int arg,
long int mux_sel,
long int data_en,
struct awg_code_generation_params *fwparams)
{
u32 instruction = 0;
u32 mux = (mux_sel << 8) & 0x1ff;
u32 data_enable = (data_en << 9) & 0x2ff;
long int arg_tmp = arg;
/* skip, repeat and replay arg should not exceed 1023.
* If user wants to exceed this value, the instruction should be
* duplicate and arg should be adjust for each duplicated instruction.
*
* mux_sel is used in case of SAV/EAV synchronization.
*/
while (arg_tmp > 0) {
arg = arg_tmp;
if (fwparams->instruction_offset >= AWG_MAX_INST) {
DRM_ERROR("too many number of instructions\n");
return -EINVAL;
}
switch (opcode) {
case SKIP:
/* leave 'arg' + 1 pixel elapsing without changing
* output bus */
arg--; /* pixel adjustment */
arg_tmp--;
if (arg < 0) {
/* SKIP instruction not needed */
return 0;
}
if (arg == 0) {
/* SKIP 0 not permitted but we want to skip 1
* pixel. So we transform SKIP into SET
* instruction */
opcode = SET;
break;
}
mux = 0;
data_enable = 0;
arg &= AWG_MAX_ARG;
break;
case REPEAT:
case REPLAY:
if (arg == 0) {
/* REPEAT or REPLAY instruction not needed */
return 0;
}
mux = 0;
data_enable = 0;
arg &= AWG_MAX_ARG;
break;
case JUMP:
mux = 0;
data_enable = 0;
arg |= 0x40; /* for jump instruction 7th bit is 1 */
arg &= AWG_MAX_ARG;
break;
case STOP:
arg = 0;
break;
case SET:
case RPTSET:
case RPLSET:
case HOLD:
arg &= (0x0ff);
break;
default:
DRM_ERROR("instruction %d does not exist\n", opcode);
return -EINVAL;
}
arg_tmp = arg_tmp - arg;
arg = ((arg + mux) + data_enable);
instruction = ((opcode) << AWG_OPCODE_OFFSET) | arg;
fwparams->ram_code[fwparams->instruction_offset] =
instruction & (0x3fff);
fwparams->instruction_offset++;
}
return 0;
}
static int awg_generate_line_signal(
struct awg_code_generation_params *fwparams,
struct awg_timing *timing)
{
long int val;
int ret = 0;
if (timing->trailing_pixels > 0) {
/* skip trailing pixel */
val = timing->blanking_level;
ret |= awg_generate_instr(RPLSET, val, 0, 0, fwparams);
val = timing->trailing_pixels - 1 + AWG_DELAY;
ret |= awg_generate_instr(SKIP, val, 0, 0, fwparams);
}
/* set DE signal high */
val = timing->blanking_level;
ret |= awg_generate_instr((timing->trailing_pixels > 0) ? SET : RPLSET,
val, 0, 1, fwparams);
if (timing->blanking_pixels > 0) {
/* skip the number of active pixel */
val = timing->active_pixels - 1;
ret |= awg_generate_instr(SKIP, val, 0, 1, fwparams);
/* set DE signal low */
val = timing->blanking_level;
ret |= awg_generate_instr(SET, val, 0, 0, fwparams);
}
return ret;
}
int sti_awg_generate_code_data_enable_mode(
struct awg_code_generation_params *fwparams,
struct awg_timing *timing)
{
long int val, tmp_val;
int ret = 0;
if (timing->trailing_lines > 0) {
/* skip trailing lines */
val = timing->blanking_level;
ret |= awg_generate_instr(RPLSET, val, 0, 0, fwparams);
val = timing->trailing_lines - 1;
ret |= awg_generate_instr(REPLAY, val, 0, 0, fwparams);
}
tmp_val = timing->active_lines - 1;
while (tmp_val > 0) {
/* generate DE signal for each line */
ret |= awg_generate_line_signal(fwparams, timing);
/* replay the sequence as many active lines defined */
ret |= awg_generate_instr(REPLAY,
min_t(int, AWG_MAX_ARG, tmp_val),
0, 0, fwparams);
tmp_val -= AWG_MAX_ARG;
}
if (timing->blanking_lines > 0) {
/* skip blanking lines */
val = timing->blanking_level;
ret |= awg_generate_instr(RPLSET, val, 0, 0, fwparams);
val = timing->blanking_lines - 1;
ret |= awg_generate_instr(REPLAY, val, 0, 0, fwparams);
}
return ret;
}
|
