Quoting Srinivasa Rao Mandadapu (2022-10-12 22:08:31)
Update HDMI volatile registers list as DMA, Channel Selection registers, vbit control registers are being reflected by hardware DP port disconnection.
This update is required to fix no display and no sound issue observed after reconnecting TAMA/SANWA DP cables. Once DP cable is unplugged, DMA control registers are being reset by hardware, however at second plugin, new dma control values does not updated to the dma hardware registers since new register value and cached values at the time of first plugin are same.
Fixes: 7cb37b7bd0d3 ("ASoC: qcom: Add support for lpass hdmi driver")
Signed-off-by: Srinivasa Rao Mandadapu quic_srivasam@quicinc.com Reported-by: Kuogee Hsieh quic_khsieh@quicinc.com
I found that another patch in this area hasn't been applied[1]. Is it still relevant? We're still carrying it in the chromium tree. If it is relevant can you please resend it.
[1] https://lore.kernel.org/all/1602596728-11783-1-git-send-email-srivasam@codea...