chk_sum 2103 drivers/gpu/drm/amd/display/dc/core/dc_resource.c uint8_t chk_sum = 0; chk_sum 2111 drivers/gpu/drm/amd/display/dc/core/dc_resource.c chk_sum += ptr[i]; chk_sum 2113 drivers/gpu/drm/amd/display/dc/core/dc_resource.c gamut_packet->sb[2] = (uint8_t) (0x100 - chk_sum);