[ Upstream commit 2b938c3ab0a69ec6ea587bbf6fc2aec3db4a8736 ] As we can clearly see in a downstream kernel [1], flushing the slave INTF is skipped /only if/ the PPSPLIT topology is active. However, when DPU was originally submitted to mainline PPSPLIT was no longer part of it (seems to have been ripped out before submission), but this clause was incorrectly ported from the original SDE driver. Given that there is no support for PPSPLIT (currently), flushing the slave INTF should /never/ be skipped (as the `if (ppsplit && !master) goto skip;` clause downstream never becomes true). [1]: https://git.codelinaro.org/clo/la/platform/vendor/opensource/display-drivers/-/blob/display-kernel.lnx.5.4.r1-rel/msm/sde/sde_encoder_phys_cmd.c?ref_type=heads#L1131-1139 Fixes: 25fdd5933e4c ("drm/msm: Add SDM845 DPU support") Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Patchwork: https://patchwork.freedesktop.org/patch/589901/ Link: https://lore.kernel.org/r/20240417-drm-msm-initial-dualpipe-dsc-fixes-v1-3-78ae3ee9a697@somainline.org Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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Linux kernel ============ There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. The formatted documentation can also be read online at: https://www.kernel.org/doc/html/latest/ There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.
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