From: Marijn Suijten <marijn.suijten@somainline.org>
To: phone-devel@vger.kernel.org, Rob Clark <robdclark@gmail.com>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Vinod Koul <vkoul@kernel.org>
Cc: ~postmarketos/upstreaming@lists.sr.ht,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@somainline.org>,
Konrad Dybcio <konrad.dybcio@somainline.org>,
Martin Botka <martin.botka@somainline.org>,
Jami Kettunen <jami.kettunen@somainline.org>,
Marijn Suijten <marijn.suijten@somainline.org>,
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,
linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org
Subject: [PATCH 0/5] drm: Fix math issues in MSM DSC implementation
Date: Sat, 1 Oct 2022 21:08:02 +0200 [thread overview]
Message-ID: <20221001190807.358691-1-marijn.suijten@somainline.org> (raw)
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.
Altogether this series is responsible for solving _all_ Display Stream
Compression issues and artifacts on the Sony Tama (sdm845) Akatsuki
smartphone (2880x1440p).
Marijn Suijten (5):
drm/msm/dsi: Remove useless math in DSC calculation
drm/msm/dsi: Remove repeated calculation of slice_per_intf
drm/msm/dsi: Account for DSC's bits_per_pixel having 4 fractional bits
drm/msm/dpu1: Account for DSC's bits_per_pixel having 4 fractional
bits
drm/dsc: Prevent negative BPG offsets from shadowing adjacent
bitfields
drivers/gpu/drm/display/drm_dsc_helper.c | 6 +--
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dsc.c | 11 +-----
drivers/gpu/drm/msm/dsi/dsi_host.c | 45 ++++++++++++++--------
3 files changed, 33 insertions(+), 29 deletions(-)
--
2.37.3
next reply other threads:[~2022-10-01 19:08 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-01 19:08 Marijn Suijten [this message]
2022-10-01 19:08 ` [PATCH 1/5] drm/msm/dsi: Remove useless math in DSC calculation Marijn Suijten
2022-10-01 20:19 ` Konrad Dybcio
2022-10-04 0:26 ` Bjorn Andersson
2022-10-04 14:33 ` [Freedreno] " Abhinav Kumar
2022-10-04 22:23 ` Marijn Suijten
2022-10-01 19:08 ` [PATCH 2/5] drm/msm/dsi: Remove repeated calculation of slice_per_intf Marijn Suijten
2022-10-01 20:22 ` Konrad Dybcio
2022-10-04 0:30 ` Bjorn Andersson
2022-10-04 14:41 ` Abhinav Kumar
2022-10-01 19:08 ` [PATCH 3/5] drm/msm/dsi: Account for DSC's bits_per_pixel having 4 fractional bits Marijn Suijten
2022-10-01 20:28 ` Konrad Dybcio
2022-10-01 20:37 ` Marijn Suijten
2022-10-04 14:45 ` Dmitry Baryshkov
2022-10-04 22:35 ` Marijn Suijten
2022-10-04 22:40 ` Dmitry Baryshkov
2022-10-04 22:56 ` Marijn Suijten
2022-10-01 19:08 ` [PATCH 4/5] drm/msm/dpu1: " Marijn Suijten
2022-10-04 14:35 ` Dmitry Baryshkov
2022-10-04 17:03 ` Abhinav Kumar
2022-10-04 22:11 ` Marijn Suijten
2022-10-05 14:19 ` Abhinav Kumar
2022-10-05 18:45 ` Marijn Suijten
2022-10-01 19:08 ` [PATCH 5/5] drm/dsc: Prevent negative BPG offsets from shadowing adjacent bitfields Marijn Suijten
2022-10-01 20:23 ` Marijn Suijten
2022-10-04 14:41 ` Dmitry Baryshkov
2022-10-04 21:48 ` Marijn Suijten
2022-10-04 20:22 ` Abhinav Kumar
2022-10-04 21:57 ` Marijn Suijten
2022-10-04 22:31 ` Abhinav Kumar
2022-10-04 22:39 ` Marijn Suijten
2022-10-05 15:33 ` Abhinav Kumar
2022-10-05 18:29 ` Marijn Suijten
2022-10-04 4:42 ` [PATCH 0/5] drm: Fix math issues in MSM DSC implementation Vinod Koul
2022-10-04 9:51 ` Marijn Suijten
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