linux-kernel - Re: [PATCH v2] ASoC: qcom: lpass-cpu: mark HDMI TX registers as volatile

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Date:   Sat, 15 Oct 2022 14:53:09 +0530
From:   Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
To:     Stephen Boyd <swboyd@...omium.org>, <agross@...nel.org>,
        <alsa-devel@...a-project.org>, <andersson@...nel.org>,
        <bgoswami@...cinc.com>, <broonie@...nel.org>,
        <devicetree@...r.kernel.org>, <judyhsiao@...omium.org>,
        <lgirdwood@...il.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <perex@...ex.cz>,
        <quic_plai@...cinc.com>, <quic_rohkumar@...cinc.com>,
        <robh+dt@...nel.org>, <srinivas.kandagatla@...aro.org>,
        <tiwai@...e.com>
Subject: Re: [PATCH v2] ASoC: qcom: lpass-cpu: mark HDMI TX registers as
 volatile


On 10/15/2022 2:41 AM, Stephen Boyd wrote:
> 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@...cinc.com>
>> Reported-by: Kuogee Hsieh <quic_khsieh@...cinc.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@codeaurora.org/

Thanks for Notifying this untracked patch.

Resent the patch.
     - 
https://patchwork.kernel.org/project/alsa-devel/patch/1665825530-7593-1-git-send-email-quic_srivasam@quicinc.com/