From: Stephen Boyd <swboyd@chromium.org>
To: Kuogee Hsieh <khsieh@codeaurora.org>,
robdclark@gmail.com, sean@poorly.run
Cc: tanmay@codeaurora.org, abhinavk@codeaurora.org,
aravindh@codeaurora.org, khsieh@codeaurora.org, airlied@linux.ie,
daniel@ffwll.ch, linux-arm-msm@vger.kernel.org,
dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drm/msm/dp: reset dp controller only at boot up and pm_resume
Date: Fri, 05 Feb 2021 14:50:07 -0800 [thread overview]
Message-ID: <161256540764.76967.2035577896654812758@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <1612557878-19743-1-git-send-email-khsieh@codeaurora.org>
Quoting Kuogee Hsieh (2021-02-05 12:44:38)
> DP_SW_RESET is the global SW reset that is used to initialize DP
> controller. If DP_SW_RESET executed during connection setup,
> two HPD related side effects may occurred,
> 1) pending HPD interrupts cleared unexpected
> 2) re start debounce logic which trigger another interrupt
> This patch only issue DP_SW_RESET at boot up and pm_resume.
> This patch also reinit video_comp before configure dp controller
> to avoid missing VIDEO_READY interrupt.
>
> Fixes: 9fc418430c65 ("drm/msm/dp: unplug interrupt missed after irq_hpd handler")
> Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
> ---
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
prev parent reply other threads:[~2021-02-06 2:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 20:44 [PATCH] drm/msm/dp: reset dp controller only at boot up and pm_resume Kuogee Hsieh
2021-02-05 22:50 ` Stephen Boyd [this message]
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