mmCRTC0_CRTC_TEST_PATTERN_CONTROL
dm_write_reg_soc15(ctx, mmCRTC0_CRTC_TEST_PATTERN_CONTROL, tg110->offsets.crtc, 0);
dm_write_reg_soc15(ctx, mmCRTC0_CRTC_TEST_PATTERN_CONTROL, tg110->offsets.crtc, value);