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Date:   Tue, 4 Oct 2022 10:12:58 +0530
From:   Vinod Koul <vkoul@kernel.org>
To:     Marijn Suijten <marijn.suijten@somainline.org>
Cc:     phone-devel@vger.kernel.org, Rob Clark <robdclark@gmail.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        ~postmarketos/upstreaming@lists.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@somainline.org>,
        Konrad Dybcio <konrad.dybcio@somainline.org>,
        Martin Botka <martin.botka@somainline.org>,
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        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Sean Paul <sean@poorly.run>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Javier Martinez Canillas <javierm@redhat.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Douglas Anderson <dianders@chromium.org>,
        Vladimir Lypak <vladimir.lypak@gmail.com>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
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Subject: Re: [PATCH 0/5] drm: Fix math issues in MSM DSC implementation
Message-ID: <Yzu50ly1AxZwmyvi@matsya>
References: <20221001190807.358691-1-marijn.suijten@somainline.org>
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On 01-10-22, 21:08, Marijn Suijten wrote:
> Various removals of complex yet unnecessary math, fixing all uses of
> drm_dsc_config::bits_per_pixel to deal with the fact that this field
> includes four fractional bits, and finally an approach for dealing with
> dsi_host setting negative values in range_bpg_offset, resulting in
> overflow inside drm_dsc_pps_payload_pack().
> 
> Note that updating the static bpg_offset array to limit the size of
> these negative values to 6 bits changes what would be written to the DPU
> hardware at register(s) DSC_RANGE_BPG_OFFSET, hence the choice has been
> made to cover up for this while packing the value into a smaller field
> instead.

Thanks for fixing these. I dont have my pixel3 availble but changes lgtm

Reviewed-by: Vinod Koul <vkoul@kernel.org>

> Altogether this series is responsible for solving _all_ Display Stream
> Compression issues and artifacts on the Sony Tama (sdm845) Akatsuki
> smartphone (2880x1440p).

Does it need two dsi lanes?

-- 
~Vinod