dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2025-09-01 08:42:12 +02:00
Code Issues Packages Projects Releases Wiki Activity

edid: Add an edid_check_checksum() helper function

Browse Source 
Add a helper function to check the checksum of an EDID data block.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Hans de Goede
2014-11-24 13:47:13 +01:00
parent b7ce12ddd7
commit e745d064b4
2 changed files with 21 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
common/edid.c
View File

@@ -12,6 +12,7 @@
#include <common.h>
#include <edid.h>
#include <errno.h>
#include <linux/ctype.h>
#include <linux/string.h>
@@ -29,6 +30,17 @@ int edid_check_info(struct edid1_info *edid_info)
return 0;
}
int edid_check_checksum(u8 *edid_block)
{
u8 checksum = 0;
int i;
for (i = 0; i < 128; i++)
checksum += edid_block[i];
return (checksum == 0) ? 0 : -EINVAL;
}
int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
unsigned int *hmax, unsigned int *vmin,
unsigned int *vmax)