drm/radeon: use sw CTS/N values for audio on DCE4+
Use the driver calculated CTS and N values rather than having hardware generate them. This allows us to use the modeline pixel clock rather than the actual pll clock when setting up the dto for audio. Fixes problems with audio playback rate on certain asics if the pll clock does not match the pixel clock exactly. Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -291,6 +291,7 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode
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/* fglrx clears sth in AFMT_AUDIO_PACKET_CONTROL2 here */
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WREG32(HDMI_ACR_PACKET_CONTROL + offset,
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HDMI_ACR_SOURCE | /* select SW CTS value */
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HDMI_ACR_AUTO_SEND); /* allow hw to sent ACR packets when required */
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evergreen_hdmi_update_ACR(encoder, mode->clock);
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