linux-kernel - Re: [PATCH v2 2/4] drm/msm/dp: Account for the timeout in wait_hpd

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Date: Mon, 18 Mar 2024 11:18:27 -0700
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: Douglas Anderson <dianders@...omium.org>, Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: Daniel Vetter <daniel@...ll.ch>, David Airlie <airlied@...il.com>,
        "Kuogee
 Hsieh" <quic_khsieh@...cinc.com>,
        Marijn Suijten
	<marijn.suijten@...ainline.org>,
        Sean Paul <sean@...rly.run>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] drm/msm/dp: Account for the timeout in
 wait_hpd_asserted() callback



On 3/15/2024 2:36 PM, Douglas Anderson wrote:
> The DP wait_hpd_asserted() callback is passed a timeout which
> indicates how long we should wait for HPD. This timeout was being
> ignored in the MSM DP implementation and instead a hardcoded 500 ms
> timeout was used. Fix it to use the proper timeout.
> 
> As part of this we move the hardcoded 500 ms number into the AUX
> transfer function, which isn't given a timeout. The wait in the AUX
> transfer function will be removed in a future commit.
> 
> Fixes: e2969ee30252 ("drm/msm/dp: move of_dp_aux_populate_bus() to eDP probe()")
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---
> 
> (no changes since v1)
> 
>   drivers/gpu/drm/msm/dp/dp_aux.c     | 5 +++--
>   drivers/gpu/drm/msm/dp/dp_catalog.c | 7 ++++---
>   drivers/gpu/drm/msm/dp/dp_catalog.h | 3 ++-
>   3 files changed, 9 insertions(+), 6 deletions(-)
> 

Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>