usEnableChannels 7900 drivers/gpu/drm/amd/include/atombios.h   USHORT  usEnableChannels;                 // bit vector which indicate which channels are enabled
usEnableChannels 7931 drivers/gpu/drm/amd/include/atombios.h   USHORT  usEnableChannels;                 // bit vector which indicate which channels are enabled
usEnableChannels 6705 drivers/gpu/drm/radeon/atombios.h   USHORT  usEnableChannels;                 // bit vector which indicate which channels are enabled