147 static int check_edid(unsigned char *edid)  in check_edid()  argument
149 	unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4];  in check_edid()
172 			if (edid[i] != edid_v1_header[i]) {  in check_edid()
179 		b = edid + EDID_STRUCT_DISPLAY;  in check_edid()
186 		b = edid + DETAILED_TIMING_DESCRIPTIONS_START;  in check_edid()
209 static void fix_edid(unsigned char *edid, int fix)  in fix_edid()  argument
217 		memcpy(edid, edid_v1_header, 8);  in fix_edid()
221 		b = edid + EDID_STRUCT_DISPLAY;  in fix_edid()
223 		edid[127] += 0x80;  in fix_edid()
227 		b = edid + DETAILED_TIMING_DESCRIPTIONS_START;  in fix_edid()
251 			csum += edid[i];  in fix_edid()
253 		edid[127] = 256 - csum;  in fix_edid()
258 static int edid_checksum(unsigned char *edid)  in edid_checksum()  argument
261 	int i, err = 0, fix = check_edid(edid);  in edid_checksum()
264 		fix_edid(edid, fix);  in edid_checksum()
267 		csum += edid[i];  in edid_checksum()
268 		all_null |= edid[i];  in edid_checksum()
279 static int edid_check_header(unsigned char *edid)  in edid_check_header()  argument
281 	int i, err = 1, fix = check_edid(edid);  in edid_check_header()
284 		fix_edid(edid, fix);  in edid_check_header()
287 		if (edid[i] != edid_v1_header[i])  in edid_check_header()
597 static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize)  in fb_create_modedb()  argument
607 	if (edid == NULL || !edid_checksum(edid) ||  in fb_create_modedb()
608 	    !edid_check_header(edid)) {  in fb_create_modedb()
616 	block = edid + DETAILED_TIMING_DESCRIPTIONS_START;  in fb_create_modedb()
629 	block = edid + ESTABLISHED_TIMING_1;  in fb_create_modedb()
633 	block = edid + STD_TIMING_DESCRIPTIONS_START;  in fb_create_modedb()
637 	block = edid + DETAILED_TIMING_DESCRIPTIONS_START;  in fb_create_modedb()
670 static int fb_get_monitor_limits(unsigned char *edid, struct fb_monspecs *specs)  in fb_get_monitor_limits()  argument
675 	block = edid + DETAILED_TIMING_DESCRIPTIONS_START;  in fb_get_monitor_limits()
699 		modes = fb_create_modedb(edid, &num_modes);  in fb_get_monitor_limits()
751 static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs)  in get_monspecs()  argument
755 	block = edid + EDID_STRUCT_DISPLAY;  in get_monspecs()
757 	fb_get_monitor_limits(edid, specs);  in get_monspecs()
869 int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)  in fb_parse_edid()  argument
874 	if (edid == NULL || var == NULL)  in fb_parse_edid()
877 	if (!(edid_checksum(edid)))  in fb_parse_edid()
880 	if (!(edid_check_header(edid)))  in fb_parse_edid()
883 	block = edid + DETAILED_TIMING_DESCRIPTIONS_START;  in fb_parse_edid()
912 void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)  in fb_edid_to_monspecs()  argument
917 	if (edid == NULL)  in fb_edid_to_monspecs()
920 	if (!(edid_checksum(edid)))  in fb_edid_to_monspecs()
923 	if (!(edid_check_header(edid)))  in fb_edid_to_monspecs()
928 	specs->version = edid[EDID_STRUCT_VERSION];  in fb_edid_to_monspecs()
929 	specs->revision = edid[EDID_STRUCT_REVISION];  in fb_edid_to_monspecs()
937 	parse_vendor_block(edid + ID_MANUFACTURER_NAME, specs);  in fb_edid_to_monspecs()
939 	block = edid + DETAILED_TIMING_DESCRIPTIONS_START;  in fb_edid_to_monspecs()
954 	get_monspecs(edid, specs);  in fb_edid_to_monspecs()
956 	specs->modedb = fb_create_modedb(edid, &specs->modedb_len);  in fb_edid_to_monspecs()
981 void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)  in fb_edid_add_monspecs()  argument
989 	if (!edid)  in fb_edid_add_monspecs()
992 	if (!edid_checksum(edid))  in fb_edid_add_monspecs()
995 	if (edid[0] != 0x2 ||  in fb_edid_add_monspecs()
996 	    edid[2] < 4 || edid[2] > 128 - DETAILED_TIMING_DESCRIPTION_SIZE)  in fb_edid_add_monspecs()
1001 	while (pos < edid[2]) {  in fb_edid_add_monspecs()
1002 		u8 len = edid[pos] & 0x1f, type = (edid[pos] >> 5) & 7;  in fb_edid_add_monspecs()
1006 				u8 idx = edid[pos + i] & 0x7f;  in fb_edid_add_monspecs()
1009 					 edid[pos + i] & 0x80 ? "" : "on-n", idx);  in fb_edid_add_monspecs()
1014 	block = edid + edid[2];  in fb_edid_add_monspecs()
1018 	for (i = 0; i < (128 - edid[2]) / DETAILED_TIMING_DESCRIPTION_SIZE;  in fb_edid_add_monspecs()
1021 			edt[num++] = block - edid;  in fb_edid_add_monspecs()
1036 		get_detailed_timing(edid + edt[i - specs->modedb_len], &m[i]);  in fb_edid_add_monspecs()
1368 int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)  in fb_parse_edid()  argument
1372 void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)  in fb_edid_to_monspecs()  argument
1376 void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)  in fb_edid_add_monspecs()  argument
1463 	unsigned char *edid = NULL;  in fb_firmware_edid()  local
1472 		edid = edid_info.dummy;  in fb_firmware_edid()
1474 	return edid;  in fb_firmware_edid()