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Filename Latest commit message Latest commit date
Abhinav Kumar d3d2aecc1f drm/msm/dsi: skip the wait for video mode done if not applicable
[ Upstream commit ab483e3adcc178254eb1ce0fbdfbea65f86f1006 ]

dsi_wait4video_done() API waits for the DSI video mode engine to
become idle so that we can transmit the DCS commands in the
beginning of BLLP. However, with the current sequence, the MDP
timing engine is turned on after the panel's pre_enable() callback
which can send out the DCS commands needed to power up the panel.

During those cases, this API will always timeout and print out the
error spam leading to long bootup times and log flooding.

Fix this by checking if the DSI video engine was actually busy before
waiting for it to become idle otherwise this is a redundant wait.

changes in v2:
	- move the reg read below the video mode check
	- minor fixes in commit text

Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/34
Fixes: a689554ba6 ("drm/msm: Initial add DSI connector support")
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/557853/
Link: https://lore.kernel.org/r/20230915204426.19011-1-quic_abhinavk@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-10-25 11:53:18 +02:00
arch parisc: Restore __ldcw_align for PA-RISC 2.0 processors 2023-10-10 21:46:45 +02:00
block
certs
crypto
Documentation
drivers drm/msm/dsi: skip the wait for video mode done if not applicable 2023-10-25 11:53:18 +02:00
fs quota: Fix slow quotaoff 2023-10-25 11:53:18 +02:00
include quota: Fix slow quotaoff 2023-10-25 11:53:18 +02:00
init
ipc
kernel
lib lib/test_meminit: fix off-by-one error in test_pages() 2023-10-25 11:53:17 +02:00
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net net: prevent address rewrite in kernel_bind() 2023-10-25 11:53:18 +02:00
samples
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security ima: rework CONFIG_IMA dependency block 2023-10-10 21:46:46 +02:00
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Makefile Linux 5.4.258 2023-10-10 21:46:46 +02:00
README

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.