diff options
| -rw-r--r-- | README | 5 | ||||
| -rw-r--r-- | common/cmd_i2c.c | 39 |
2 files changed, 44 insertions, 0 deletions
@@ -1488,6 +1488,11 @@ CBFS (Coreboot Filesystem) support Support drawing of RLE8-compressed bitmaps on the LCD. + CONFIG_I2C_EDID + + Enables an 'i2c edid' command which can read EDID + information over I2C from an attached LCD display. + - Splash Screen Support: CONFIG_SPLASH_SCREEN diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c index e7df2e42b..438079447 100644 --- a/common/cmd_i2c.c +++ b/common/cmd_i2c.c @@ -78,6 +78,7 @@ #include <common.h> #include <command.h> +#include <edid.h> #include <environment.h> #include <i2c.h> #include <malloc.h> @@ -1340,6 +1341,38 @@ static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) } #endif +/* + * Syntax: + * i2c edid {i2c_chip} + */ +#if defined(CONFIG_I2C_EDID) +int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) +{ + u_char chip; + struct edid1_info edid; + + if (argc < 2) { + cmd_usage(cmdtp); + return 1; + } + + chip = simple_strtoul(argv[1], NULL, 16); + if (i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid)) != 0) { + puts("Error reading EDID content.\n"); + return 1; + } + + if (edid_check_info(&edid)) { + puts("Content isn't valid EDID.\n"); + return 1; + } + + edid_print_info(&edid); + return 0; + +} +#endif /* CONFIG_I2C_EDID */ + #if defined(CONFIG_I2C_MUX) /** * do_i2c_add_bus() - Handle the "i2c bus" command-line command @@ -1487,6 +1520,9 @@ static cmd_tbl_t cmd_i2c_sub[] = { #if defined(CONFIG_I2C_MULTI_BUS) U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""), #endif /* CONFIG_I2C_MULTI_BUS */ +#if defined(CONFIG_I2C_EDID) + U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""), +#endif /* CONFIG_I2C_EDID */ U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""), U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""), U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""), @@ -1547,6 +1583,9 @@ static char i2c_help_text[] = #if defined(CONFIG_I2C_MULTI_BUS) "i2c dev [dev] - show or set current I2C bus\n" #endif /* CONFIG_I2C_MULTI_BUS */ +#if defined(CONFIG_I2C_EDID) + "i2c edid chip - print EDID configuration information\n" +#endif /* CONFIG_I2C_EDID */ "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n" "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n" "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n" |