Hi, While looking into dce_v8_0.c, I stumbled upon something that might be wrong dce_v8_0_afmt_update_ACR(). We can read: WREG32(mmHDMI_ACR_32_0 + offset, (acr.cts_32khz << HDMI_ACR_44_0__HDMI_ACR_CTS_44__SHIFT)); However, I'm mostly sure it should be (luckily, the shift is of the same value): WREG32(mmHDMI_ACR_32_0 + offset, (acr.cts_32khz << HDMI_ACR_32_0__HDMI_ACR_CTS_32__SHIFT)); Cheers -- Alexandre Demers