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path: root/drivers/video/fbmon.c
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-rw-r--r--drivers/video/fbmon.c169
1 files changed, 113 insertions, 56 deletions
diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c
index 6b385c39b8b5..438b9411905c 100644
--- a/drivers/video/fbmon.c
+++ b/drivers/video/fbmon.c
@@ -48,8 +48,9 @@
48#define DPRINTK(fmt, args...) 48#define DPRINTK(fmt, args...)
49#endif 49#endif
50 50
51#define FBMON_FIX_HEADER 1 51#define FBMON_FIX_HEADER 1
52#define FBMON_FIX_INPUT 2 52#define FBMON_FIX_INPUT 2
53#define FBMON_FIX_TIMINGS 3
53 54
54#ifdef CONFIG_FB_MODE_HELPERS 55#ifdef CONFIG_FB_MODE_HELPERS
55struct broken_edid { 56struct broken_edid {
@@ -71,6 +72,12 @@ static const struct broken_edid brokendb[] = {
71 .model = 0x5a44, 72 .model = 0x5a44,
72 .fix = FBMON_FIX_INPUT, 73 .fix = FBMON_FIX_INPUT,
73 }, 74 },
75 /* Sharp UXGA? */
76 {
77 .manufacturer = "SHP",
78 .model = 0x138e,
79 .fix = FBMON_FIX_TIMINGS,
80 },
74}; 81};
75 82
76static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff, 83static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff,
@@ -87,6 +94,55 @@ static void copy_string(unsigned char *c, unsigned char *s)
87 while (i-- && (*--s == 0x20)) *s = 0; 94 while (i-- && (*--s == 0x20)) *s = 0;
88} 95}
89 96
97static int edid_is_serial_block(unsigned char *block)
98{
99 if ((block[0] == 0x00) && (block[1] == 0x00) &&
100 (block[2] == 0x00) && (block[3] == 0xff) &&
101 (block[4] == 0x00))
102 return 1;
103 else
104 return 0;
105}
106
107static int edid_is_ascii_block(unsigned char *block)
108{
109 if ((block[0] == 0x00) && (block[1] == 0x00) &&
110 (block[2] == 0x00) && (block[3] == 0xfe) &&
111 (block[4] == 0x00))
112 return 1;
113 else
114 return 0;
115}
116
117static int edid_is_limits_block(unsigned char *block)
118{
119 if ((block[0] == 0x00) && (block[1] == 0x00) &&
120 (block[2] == 0x00) && (block[3] == 0xfd) &&
121 (block[4] == 0x00))
122 return 1;
123 else
124 return 0;
125}
126
127static int edid_is_monitor_block(unsigned char *block)
128{
129 if ((block[0] == 0x00) && (block[1] == 0x00) &&
130 (block[2] == 0x00) && (block[3] == 0xfc) &&
131 (block[4] == 0x00))
132 return 1;
133 else
134 return 0;
135}
136
137static int edid_is_timing_block(unsigned char *block)
138{
139 if ((block[0] != 0x00) || (block[1] != 0x00) ||
140 (block[2] != 0x00) || (block[4] != 0x00))
141 return 1;
142 else
143 return 0;
144}
145
90static int check_edid(unsigned char *edid) 146static int check_edid(unsigned char *edid)
91{ 147{
92 unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4]; 148 unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4];
@@ -104,9 +160,6 @@ static int check_edid(unsigned char *edid)
104 for (i = 0; i < ARRAY_SIZE(brokendb); i++) { 160 for (i = 0; i < ARRAY_SIZE(brokendb); i++) {
105 if (!strncmp(manufacturer, brokendb[i].manufacturer, 4) && 161 if (!strncmp(manufacturer, brokendb[i].manufacturer, 4) &&
106 brokendb[i].model == model) { 162 brokendb[i].model == model) {
107 printk("fbmon: The EDID Block of "
108 "Manufacturer: %s Model: 0x%x is known to "
109 "be broken,\n", manufacturer, model);
110 fix = brokendb[i].fix; 163 fix = brokendb[i].fix;
111 break; 164 break;
112 } 165 }
@@ -115,8 +168,10 @@ static int check_edid(unsigned char *edid)
115 switch (fix) { 168 switch (fix) {
116 case FBMON_FIX_HEADER: 169 case FBMON_FIX_HEADER:
117 for (i = 0; i < 8; i++) { 170 for (i = 0; i < 8; i++) {
118 if (edid[i] != edid_v1_header[i]) 171 if (edid[i] != edid_v1_header[i]) {
119 ret = fix; 172 ret = fix;
173 break;
174 }
120 } 175 }
121 break; 176 break;
122 case FBMON_FIX_INPUT: 177 case FBMON_FIX_INPUT:
@@ -126,14 +181,34 @@ static int check_edid(unsigned char *edid)
126 if (b[4] & 0x01 && b[0] & 0x80) 181 if (b[4] & 0x01 && b[0] & 0x80)
127 ret = fix; 182 ret = fix;
128 break; 183 break;
184 case FBMON_FIX_TIMINGS:
185 b = edid + DETAILED_TIMING_DESCRIPTIONS_START;
186 ret = fix;
187
188 for (i = 0; i < 4; i++) {
189 if (edid_is_limits_block(b)) {
190 ret = 0;
191 break;
192 }
193
194 b += DETAILED_TIMING_DESCRIPTION_SIZE;
195 }
196
197 break;
129 } 198 }
130 199
200 if (ret)
201 printk("fbmon: The EDID Block of "
202 "Manufacturer: %s Model: 0x%x is known to "
203 "be broken,\n", manufacturer, model);
204
131 return ret; 205 return ret;
132} 206}
133 207
134static void fix_edid(unsigned char *edid, int fix) 208static void fix_edid(unsigned char *edid, int fix)
135{ 209{
136 unsigned char *b; 210 int i;
211 unsigned char *b, csum = 0;
137 212
138 switch (fix) { 213 switch (fix) {
139 case FBMON_FIX_HEADER: 214 case FBMON_FIX_HEADER:
@@ -145,6 +220,37 @@ static void fix_edid(unsigned char *edid, int fix)
145 b = edid + EDID_STRUCT_DISPLAY; 220 b = edid + EDID_STRUCT_DISPLAY;
146 b[0] &= ~0x80; 221 b[0] &= ~0x80;
147 edid[127] += 0x80; 222 edid[127] += 0x80;
223 break;
224 case FBMON_FIX_TIMINGS:
225 printk("fbmon: trying to fix monitor timings\n");
226 b = edid + DETAILED_TIMING_DESCRIPTIONS_START;
227 for (i = 0; i < 4; i++) {
228 if (!(edid_is_serial_block(b) ||
229 edid_is_ascii_block(b) ||
230 edid_is_monitor_block(b) ||
231 edid_is_timing_block(b))) {
232 b[0] = 0x00;
233 b[1] = 0x00;
234 b[2] = 0x00;
235 b[3] = 0xfd;
236 b[4] = 0x00;
237 b[5] = 60; /* vfmin */
238 b[6] = 60; /* vfmax */
239 b[7] = 30; /* hfmin */
240 b[8] = 75; /* hfmax */
241 b[9] = 17; /* pixclock - 170 MHz*/
242 b[10] = 0; /* GTF */
243 break;
244 }
245
246 b += DETAILED_TIMING_DESCRIPTION_SIZE;
247 }
248
249 for (i = 0; i < EDID_LENGTH - 1; i++)
250 csum += edid[i];
251
252 edid[127] = 256 - csum;
253 break;
148 } 254 }
149} 255}
150 256
@@ -273,46 +379,6 @@ static void get_chroma(unsigned char *block, struct fb_monspecs *specs)
273 DPRINTK("WhiteY: 0.%03d\n", specs->chroma.whitey); 379 DPRINTK("WhiteY: 0.%03d\n", specs->chroma.whitey);
274} 380}
275 381
276static int edid_is_serial_block(unsigned char *block)
277{
278 if ((block[0] == 0x00) && (block[1] == 0x00) &&
279 (block[2] == 0x00) && (block[3] == 0xff) &&
280 (block[4] == 0x00))
281 return 1;
282 else
283 return 0;
284}
285
286static int edid_is_ascii_block(unsigned char *block)
287{
288 if ((block[0] == 0x00) && (block[1] == 0x00) &&
289 (block[2] == 0x00) && (block[3] == 0xfe) &&
290 (block[4] == 0x00))
291 return 1;
292 else
293 return 0;
294}
295
296static int edid_is_limits_block(unsigned char *block)
297{
298 if ((block[0] == 0x00) && (block[1] == 0x00) &&
299 (block[2] == 0x00) && (block[3] == 0xfd) &&
300 (block[4] == 0x00))
301 return 1;
302 else
303 return 0;
304}
305
306static int edid_is_monitor_block(unsigned char *block)
307{
308 if ((block[0] == 0x00) && (block[1] == 0x00) &&
309 (block[2] == 0x00) && (block[3] == 0xfc) &&
310 (block[4] == 0x00))
311 return 1;
312 else
313 return 0;
314}
315
316static void calc_mode_timings(int xres, int yres, int refresh, 382static void calc_mode_timings(int xres, int yres, int refresh,
317 struct fb_videomode *mode) 383 struct fb_videomode *mode)
318{ 384{
@@ -795,15 +861,6 @@ static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs)
795 } 861 }
796} 862}
797 863
798static int edid_is_timing_block(unsigned char *block)
799{
800 if ((block[0] != 0x00) || (block[1] != 0x00) ||
801 (block[2] != 0x00) || (block[4] != 0x00))
802 return 1;
803 else
804 return 0;
805}
806
807int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var) 864int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
808{ 865{
809 int i; 866 int i;
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-03 22:53:21 -0500