[PATCH 11/17] drm/amd/display: parse umc_info or vram_info based on ASIC

[Zaeem Mohamed]

From: Aurabindo Pillai <aurabindo.pillai at amd.com>

An upstream bug report suggests that there are production dGPUs that are
older than DCN401 but still have a umc_info in VBIOS tables with the
same version as expected for a DCN401 product. Hence, reading this
tables should be guarded with a version check.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3678

Reviewed-by: Dillon Varone <dillon.varone at amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed at amd.com>
---
 drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
index 0d8498ab9b23..be8fbb04ad98 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
@@ -3127,7 +3127,9 @@ static enum bp_result bios_parser_get_vram_info(
 	struct atom_data_revision revision;
 
 	// vram info moved to umc_info for DCN4x
-	if (info && DATA_TABLES(umc_info)) {
+	if (dcb->ctx->dce_version >= DCN_VERSION_4_01 &&
+		dcb->ctx->dce_version < DCN_VERSION_MAX &&
+		info && DATA_TABLES(umc_info)) {
 		header = GET_IMAGE(struct atom_common_table_header,
 					DATA_TABLES(umc_info));
 
-- 
2.34.1