linux-kernel - Re: [PATCH 0/7] drm/msm/dp: Simplify DPCD related code with helpers

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Date:   Mon, 4 Sep 2023 01:45:37 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Stephen Boyd <swboyd@...omium.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc:     linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        Sean Paul <sean@...rly.run>, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org,
        Vinod Polimera <quic_vpolimer@...cinc.com>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>
Subject: Re: [PATCH 0/7] drm/msm/dp: Simplify DPCD related code with helpers

On 29/08/2023 21:47, Stephen Boyd wrote:
> This driver open-codes a few of the DPCD register reads when it can be
> simplified by using the helpers instead. This series reworks the MSM DP
> driver to use the DPCD helpers and removes some dead code along the way.
> There's the potential for even more code reduction around the test
> registers, but I haven't tried to do that yet.

For the whole series:

Tested-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

Using drm_dp_get_phy_test_pattern() / drm_dp_set_phy_test_pattern() 
would be definitely a benefit, especially since the latter one has 
support for DP >= 1.2, while msm DP code doesn't.

> 
> Stephen Boyd (7):
>    drm/msm/dp: Replace open-coded drm_dp_read_dpcd_caps()
>    drm/msm/dp: Use drm_dp_read_sink_count() helper
>    drm/msm/dp: Remove dead code related to downstream cap info
>    drm/msm/dp: Remove aux_cfg_update_done and related code
>    drm/msm/dp: Simplify with drm_dp_{max_link_rate,max_lane_count}()
>    drm/msm/dp: Inline dp_link_parse_sink_count()
>    drm/msm/dp: Remove dp_display_is_ds_bridge()
> 
> Cc: Vinod Polimera <quic_vpolimer@...cinc.com>
> Cc: Kuogee Hsieh <quic_khsieh@...cinc.com>
> 
>   drivers/gpu/drm/msm/dp/dp_display.c |   9 +--
>   drivers/gpu/drm/msm/dp/dp_link.c    |  38 +---------
>   drivers/gpu/drm/msm/dp/dp_panel.c   | 105 +++++-----------------------
>   drivers/gpu/drm/msm/dp/dp_panel.h   |  10 +--
>   4 files changed, 22 insertions(+), 140 deletions(-)
> 
> 
> base-commit: 2dde18cd1d8fac735875f2e4987f11817cc0bc2c

-- 
With best wishes
Dmitry