Commit 735987c5a85b7e249903248f2ec85b467afa3de8
Committed by
Tom Rini
Tom Rini
1 parent
d46b5f7dcb
Exists in
master
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54 other branches
edid: Add I2C command for printing the EDID
Add a single command to read the EDID information over I2C.
For example:
SMDK5250 # i2c dev 7
Setting bus to 7
SMDK5250 # i2c edid 50
EDID version: 1.4
Product ID code: 305c
Manufacturer: AUO
Serial number: 00000000
Manufactured in week: 0 year: 2011
Video input definition: digital signal, voltage level 0, blank to black
Monitor is non-RGB
Maximum visible display size: 26 cm x 14 cm
Power management features: no active off, no suspend, no standby
Estabilished timings:
Standard timings:
1366x768 60 Hz (detailed)
1366x768 60 Hz (detailed)
Monitor ID: 2VD2K.B116XW
Signed-off-by: Tom Wai-Hong Tam <waihong@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Showing 2 changed files with 44 additions and 0 deletions Side-by-side Diff
README
| ... | ... | @@ -1488,6 +1488,11 @@ |
| 1488 | 1488 | |
| 1489 | 1489 | Support drawing of RLE8-compressed bitmaps on the LCD. |
| 1490 | 1490 | |
| 1491 | + CONFIG_I2C_EDID | |
| 1492 | + | |
| 1493 | + Enables an 'i2c edid' command which can read EDID | |
| 1494 | + information over I2C from an attached LCD display. | |
| 1495 | + | |
| 1491 | 1496 | |
| 1492 | 1497 | - Splash Screen Support: CONFIG_SPLASH_SCREEN |
| 1493 | 1498 |
common/cmd_i2c.c
| ... | ... | @@ -78,6 +78,7 @@ |
| 78 | 78 | |
| 79 | 79 | #include <common.h> |
| 80 | 80 | #include <command.h> |
| 81 | +#include <edid.h> | |
| 81 | 82 | #include <environment.h> |
| 82 | 83 | #include <i2c.h> |
| 83 | 84 | #include <malloc.h> |
| ... | ... | @@ -1340,6 +1341,38 @@ |
| 1340 | 1341 | } |
| 1341 | 1342 | #endif |
| 1342 | 1343 | |
| 1344 | +/* | |
| 1345 | + * Syntax: | |
| 1346 | + * i2c edid {i2c_chip} | |
| 1347 | + */ | |
| 1348 | +#if defined(CONFIG_I2C_EDID) | |
| 1349 | +int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) | |
| 1350 | +{ | |
| 1351 | + u_char chip; | |
| 1352 | + struct edid1_info edid; | |
| 1353 | + | |
| 1354 | + if (argc < 2) { | |
| 1355 | + cmd_usage(cmdtp); | |
| 1356 | + return 1; | |
| 1357 | + } | |
| 1358 | + | |
| 1359 | + chip = simple_strtoul(argv[1], NULL, 16); | |
| 1360 | + if (i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid)) != 0) { | |
| 1361 | + puts("Error reading EDID content.\n"); | |
| 1362 | + return 1; | |
| 1363 | + } | |
| 1364 | + | |
| 1365 | + if (edid_check_info(&edid)) { | |
| 1366 | + puts("Content isn't valid EDID.\n"); | |
| 1367 | + return 1; | |
| 1368 | + } | |
| 1369 | + | |
| 1370 | + edid_print_info(&edid); | |
| 1371 | + return 0; | |
| 1372 | + | |
| 1373 | +} | |
| 1374 | +#endif /* CONFIG_I2C_EDID */ | |
| 1375 | + | |
| 1343 | 1376 | #if defined(CONFIG_I2C_MUX) |
| 1344 | 1377 | /** |
| 1345 | 1378 | * do_i2c_add_bus() - Handle the "i2c bus" command-line command |
| ... | ... | @@ -1487,6 +1520,9 @@ |
| 1487 | 1520 | #if defined(CONFIG_I2C_MULTI_BUS) |
| 1488 | 1521 | U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""), |
| 1489 | 1522 | #endif /* CONFIG_I2C_MULTI_BUS */ |
| 1523 | +#if defined(CONFIG_I2C_EDID) | |
| 1524 | + U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""), | |
| 1525 | +#endif /* CONFIG_I2C_EDID */ | |
| 1490 | 1526 | U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""), |
| 1491 | 1527 | U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""), |
| 1492 | 1528 | U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""), |
| ... | ... | @@ -1547,6 +1583,9 @@ |
| 1547 | 1583 | #if defined(CONFIG_I2C_MULTI_BUS) |
| 1548 | 1584 | "i2c dev [dev] - show or set current I2C bus\n" |
| 1549 | 1585 | #endif /* CONFIG_I2C_MULTI_BUS */ |
| 1586 | +#if defined(CONFIG_I2C_EDID) | |
| 1587 | + "i2c edid chip - print EDID configuration information\n" | |
| 1588 | +#endif /* CONFIG_I2C_EDID */ | |
| 1550 | 1589 | "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n" |
| 1551 | 1590 | "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n" |
| 1552 | 1591 | "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n" |