git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-04-18 06:33:43 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amd/display: Parse all extension blocks for VSDB

Browse Source 
[Why]
VSDB parsing loop only searched within the first extension block.
If the VSDB was located in a subsequent extension block,
it would not be found.

[How]
Calculate the total length of all extension blocks (EDID_LENGTH *
edid->extensions) and use that as the loop boundary, allowing the
parser to search through all available extension blocks.

Reviewed-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ray Wu
2026-01-26 15:55:18 +08:00
committed by Alex Deucher
parent 4bff89bad9
commit 0faccfa9ca
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@@ -13149,6 +13149,7 @@ static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
u8 *edid_ext = NULL;
int i;
int j = 0;
int total_ext_block_len;
if (edid == NULL || edid->extensions == 0)
return -ENODEV;
@@ -13160,7 +13161,8 @@ static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
break;
}
while (j < EDID_LENGTH - sizeof(struct amd_vsdb_block)) {
total_ext_block_len = EDID_LENGTH * edid->extensions;
while (j < total_ext_block_len - sizeof(struct amd_vsdb_block)) {
struct amd_vsdb_block *amd_vsdb = (struct amd_vsdb_block *)&edid_ext[j];
unsigned int ieeeId = (amd_vsdb->ieee_id[2] << 16) | (amd_vsdb->ieee_id[1] << 8) | (amd_vsdb->ieee_id[0]);