drm/msm/dsi: Remove useless math in DSC calculations

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[ Upstream commit 01a907980e ]

Multiplying a value by 2 and adding 1 to it always results in a value
that is uneven, and that 1 gets truncated immediately when performing
integer division by 2 again.  There is no "rounding" possible here.

After that target_bpp_x16 is used to store a multiplication of
bits_per_pixel by 16 which is only ever read to immediately be divided
by 16 again, and is elided in much the same way.

Fixes: b9080324d6 ("drm/msm/dsi: add support for dsc data")
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Patchwork: https://patchwork.freedesktop.org/patch/508932/
Link: https://lore.kernel.org/r/20221026182824.876933-2-marijn.suijten@somainline.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Marijn Suijten 2022-10-26 20:28:15 +02:00 • committed by Greg Kroah-Hartman

parent 4235be829c

commit 36e8894c56

1 changed files with 1 additions and 9 deletions

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drivers/gpu/drm/msm/dsi/dsi_host.c

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