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drm/amdgpu: Fix vbios version string search

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Search for vbios version string in STRING_OFFSET-ATOM_ROM_HEADER region
first. If those offsets are not populated, use the hardcoded region.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar 2023-09-14 14:51:52 +05:30 committed by Alex Deucher
parent 2af351d692
commit 24f60ddc4b
1 changed files with 18 additions and 1 deletions
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19
drivers/gpu/drm/amd/amdgpu/atom.c
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@ -1444,10 +1444,27 @@ static void atom_get_vbios_pn(struct atom_context *ctx)
static void atom_get_vbios_version(struct atom_context *ctx)
{
unsigned short start = 3, end;
unsigned char *vbios_ver;
unsigned char *p_rom;
p_rom = ctx->bios;
/* Search from strings offset if it's present */
start = *(unsigned short *)(p_rom +
OFFSET_TO_GET_ATOMBIOS_STRING_START);
/* Search till atom rom header start point */
end = *(unsigned short *)(p_rom + OFFSET_TO_ATOM_ROM_HEADER_POINTER);
/* Use hardcoded offsets, if the offsets are not populated */
if (end <= start) {
start = 3;
end = 1024;
}
/* find anchor ATOMBIOSBK-AMD */
vbios_ver = atom_find_str_in_rom(ctx, BIOS_VERSION_PREFIX, 3, 1024, 64);
vbios_ver =
atom_find_str_in_rom(ctx, BIOS_VERSION_PREFIX, start, end, 64);
if (vbios_ver != NULL) {
/* skip ATOMBIOSBK-AMD VER */
vbios_ver += 18;