mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2026-01-12 04:02:06 +01:00
5e9b0b56ad
Add a new command to read EDID info from connected display. When applicable EDID can also be retrieved by commands such as: i2c dev x i2c edid 0x50 but the new read_edid function relies on the implementation of the read_edid callback from DISPLAY driver. Signed-off-by: Julien Stephan <jstephan@baylibre.com>
39 lines
800 B
C
39 lines
800 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2025 BayLibre, SAS
|
|
*/
|
|
|
|
#include <command.h>
|
|
#include <dm.h>
|
|
#include <display.h>
|
|
#include <edid.h>
|
|
|
|
static int do_read_edid(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
u8 edid[EDID_EXT_SIZE];
|
|
|
|
/* Get the first display device (UCLASS_DISPLAY) */
|
|
ret = uclass_first_device_err(UCLASS_DISPLAY, &dev);
|
|
if (ret) {
|
|
printf("Cannot get display device: %d\n", ret);
|
|
return CMD_RET_FAILURE;
|
|
}
|
|
|
|
ret = display_read_edid(dev, edid, EDID_EXT_SIZE);
|
|
if (ret) {
|
|
printf("Cannot read edid: %d\n", ret);
|
|
return CMD_RET_FAILURE;
|
|
}
|
|
|
|
edid_print_info((struct edid1_info *)edid);
|
|
|
|
return CMD_RET_SUCCESS;
|
|
}
|
|
|
|
U_BOOT_CMD(read_edid, 1, 0, do_read_edid,
|
|
"Read and print EDID from display",
|
|
""
|
|
);
|