linux-kernel - Re: [PATCH v2] drm/msm/dp: only signal audio when disconnected detected at dp_pm

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Date:   Wed, 29 Sep 2021 17:02:40 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Kuogee Hsieh <khsieh@...eaurora.org>, agross@...nel.org,
        bjorn.andersson@...aro.org, robdclark@...il.com, sean@...rly.run,
        vkoul@...nel.org
Cc:     abhinavk@...eaurora.org, aravindh@...eaurora.org,
        freedreno@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/msm/dp: only signal audio when disconnected
 detected at dp_pm_resume

Quoting Kuogee Hsieh (2021-09-29 09:17:04)
> Currently there is audio not working problem after system resume from suspend
> if hdmi monitor stay plugged in at DUT. However this problem does not happen
> at normal operation but at a particular test case. The root cause is DP driver
> signal audio with connected state at resume which trigger audio trying to setup
> audio data path through DP main link but failed due to display port is not setup
> and enabled by upper layer framework yet. This patch only have DP driver signal
> audio only when DP is in disconnected state so that audio option shows correct
> state after system resume. DP driver will not signal audio with connected state
> until display enabled executed by upper layer framework where display port is
> setup completed and main link is running.
>
> Changes in V2:
> -- add details commit text
>
> Fixes: 078867ce04ed ("drm/msm/dp: signal audio plugged change at dp_pm_resume")
> Signed-off-by: Kuogee Hsieh <khsieh@...eaurora.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@...omium.org>