From: Aurabindo Pillai Date: Fri, 18 Oct 2024 14:52:16 +0000 (-0400) Subject: drm/amd/display: parse umc_info or vram_info based on ASIC X-Git-Tag: v6.12.5~141 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f46e40df44a904a686ea0d6657bec1182c2cfe41;p=thirdparty%2Fkernel%2Fstable.git drm/amd/display: parse umc_info or vram_info based on ASIC [ Upstream commit 2551b4a321a68134360b860113dd460133e856e5 ] 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 Signed-off-by: Aurabindo Pillai Signed-off-by: Zaeem Mohamed Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- 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 c9a6de110b742..902491669cbc7 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));