From: Stephen Boyd <swboyd@chromium.org>
To: Kuogee Hsieh <khsieh@codeaurora.org>,
dri-devel@lists.freedesktop.org, robdclark@gmail.com,
sean@poorly.run
Cc: abhinavk@codeaurora.org, aravindh@codeaurora.org,
airlied@linux.ie, daniel@ffwll.ch, bjorn.andersson@linaro.org,
linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 6/6] drm/msm/dp: do not end dp link training until video is ready
Date: Tue, 10 Aug 2021 14:35:54 -0700 [thread overview]
Message-ID: <CAE-0n52n6ypCLrA3mWHekh9Caq8rT5ngV2X5MWdGYA8DJQb92g@mail.gmail.com> (raw)
In-Reply-To: <1628196295-7382-7-git-send-email-khsieh@codeaurora.org>
Quoting Kuogee Hsieh (2021-08-05 13:44:55)
> Initialize both pre-emphasis and voltage swing level to 0 before
> start link training and do not end link training until video is
> ready to reduce the period between end of link training and video
> start to meet Link Layer CTS requirement. Some dongle main link
> symbol may become unlocked again if host did not end link training
> soon enough after completion of link training 2. Host have to re
> train main link if loss of symbol locked detected before end link
> training so that the coming video stream can be transmitted to sink
> properly. This fixes Link Layer CTS cases 4.3.2.1, 4.3.2.2, 4.3.2.3
> and 4.3.2.4.
>
> Changes in v3:
> -- merge retrain link if loss of symbol locked happen into this patch
> -- replace dp_ctrl_loss_symbol_lock() with dp_ctrl_channel_eq_ok()
>
> Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
> ---
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
next prev parent reply other threads:[~2021-08-10 21:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-05 20:44 [PATCH v3 0/6] add fixes to pass DP Link Layer compliance test cases Kuogee Hsieh
2021-08-05 20:44 ` [PATCH v3 1/6] drm/msm/dp: use dp_ctrl_off_link_stream during PHY compliance test run Kuogee Hsieh
2021-08-05 20:44 ` [PATCH v3 2/6] drm/msm/dp: reduce link rate if failed at link training 1 Kuogee Hsieh
2021-08-10 21:32 ` Stephen Boyd
2021-08-10 21:32 ` Stephen Boyd
2021-08-05 20:44 ` [PATCH v3 3/6] drm/msm/dp: reset aux controller after dp_aux_cmd_fifo_tx() failed Kuogee Hsieh
2021-08-05 20:44 ` [PATCH v3 4/6] drm/msm/dp: replug event is converted into an unplug followed by an plug events Kuogee Hsieh
2021-08-10 21:33 ` Stephen Boyd
2021-08-10 21:33 ` Stephen Boyd
2021-08-05 20:44 ` [PATCH v3 5/6] drm/msm/dp: return correct edid checksum after corrupted edid checksum read Kuogee Hsieh
2021-08-10 21:34 ` Stephen Boyd
2021-08-10 21:34 ` Stephen Boyd
2021-08-05 20:44 ` [PATCH v3 6/6] drm/msm/dp: do not end dp link training until video is ready Kuogee Hsieh
2021-08-10 21:35 ` Stephen Boyd [this message]
2021-08-10 21:35 ` Stephen Boyd
2021-08-10 21:49 ` [PATCH v3 0/6] add fixes to pass DP Link Layer compliance test cases Stephen Boyd
2021-08-10 21:49 ` Stephen Boyd
2021-08-11 7:20 ` Jani Nikula
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