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Once channel's job is hung, it dumps the channel's state into KMSG before
tearing down the offending job. If multiple channels hang at once, then
they dump messages simultaneously, making the debug info unreadable, and
thus, useless. This patch adds mutex which allows only one channel to emit
debug messages at a time.
Signed-off-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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git://anongit.freedesktop.org/tegra/linux into drm-next
drm/tegra: Changes for v5.3-rc1
This contains a couple of small improvements and cleanups for the Tegra
DRM driver.
Signed-off-by: Dave Airlie <[email protected]>
From: Thierry Reding <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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So there is no need to check for a value that can never happen. No need
to check the return value all anyway, as any debugfs call can take the
result of this function as an option just fine.
Cc: Thierry Reding <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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Based on 1 normalized pattern(s):
this software is licensed under the terms of the gnu general public
license version 2 as published by the free software foundation and
may be copied distributed and modified under those terms this
program is distributed in the hope that it will be useful but
without any warranty without even the implied warranty of
merchantability or fitness for a particular purpose see the gnu
general public license for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 285 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Alexios Zavras <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Use unsigned int where possible and don't unnecessarily initialize the
loop variable.
Reviewed-by: Dmitry Osipenko <[email protected]>
Tested-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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The host1x driver prints out "disassembly" dumps of the command FIFO
and gather contents on submission timeouts. However, the output has
been quite difficult to read with unnecessary newlines and occasional
missing parentheses.
Fix these problems by using pr_cont to remove unnecessary newlines
and by fixing other small issues.
Signed-off-by: Mikko Perttunen <[email protected]>
Reviewed-by: Dmitry Osipenko <[email protected]>
Tested-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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This is largely a rewrite of the Host1x channel allocation code, bringing
several changes:
- The previous code could deadlock due to an interaction
between the 'reflock' mutex and CDMA timeout handling.
This gets rid of the mutex.
- Support for more than 32 channels, required for Tegra186
- General refactoring, including better encapsulation
of channel ownership handling into channel.c
Signed-off-by: Mikko Perttunen <[email protected]>
Reviewed-by: Dmitry Osipenko <[email protected]>
Tested-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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Insert a number of blank lines in places where they increase readability
of the code. Also collapse various variable declarations to shorten some
functions and finally rewrite some code for readability.
Signed-off-by: Thierry Reding <[email protected]>
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Fix a couple of occurrences where no blank line was used to separate
variable declarations from code or where block comments were wrongly
formatted.
Signed-off-by: Thierry Reding <[email protected]>
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The number of channels, syncpoints, bases and mlocks can never be
negative, so use unsigned int instead of int. Also make loop variables
the same type for consistency.
Signed-off-by: Thierry Reding <[email protected]>
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When debugfs support isn't enabled, gcc complains about some variables
being unused. To avoid further #ifdefery, move debugfs specific setup
code into static functions and use IS_ENABLED(CONFIG_DEBUG_FS) to have
the compiler, rather than the preprocessor, discard them when unused.
The advantage of doing it this way is that all the code will be
compile-tested whether or not debugfs support is enabled.
Signed-off-by: Thierry Reding <[email protected]>
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Add support for host1x debugging. Adds debugfs entries, and dumps
channel state to UART in case of stuck job.
Signed-off-by: Arto Merilainen <[email protected]>
Signed-off-by: Terje Bergstrom <[email protected]>
Reviewed-by: Thierry Reding <[email protected]>
Tested-by: Thierry Reding <[email protected]>
Tested-by: Erik Faye-Lund <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
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