License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 14:07:57 +00:00
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/* SPDX-License-Identifier: GPL-2.0 */
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
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/*
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* HD-audio regmap helpers
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*/
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#ifndef __SOUND_HDA_REGMAP_H
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#define __SOUND_HDA_REGMAP_H
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#include <linux/regmap.h>
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#include <sound/core.h>
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#include <sound/hdaudio.h>
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2015-06-11 08:51:28 +00:00
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#define AC_AMP_FAKE_MUTE 0x10 /* fake mute bit set to amp verbs */
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
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int snd_hdac_regmap_init(struct hdac_device *codec);
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void snd_hdac_regmap_exit(struct hdac_device *codec);
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2015-02-26 11:29:03 +00:00
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int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
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unsigned int verb);
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
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int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
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unsigned int *val);
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2016-04-21 15:49:11 +00:00
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int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
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unsigned int reg, unsigned int *val);
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
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int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
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unsigned int val);
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int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
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unsigned int mask, unsigned int val);
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ALSA: hda: Manage concurrent reg access more properly
In the commit 8e85def5723e ("ALSA: hda: enable regmap internal
locking"), we re-enabled the regmap lock due to the reported
regression that showed the possible concurrent accesses. It was a
temporary workaround, and there are still a few opened races even
after the revert. In this patch, we cover those still opened windows
with a proper mutex lock and disable the regmap internal lock again.
First off, the patch introduces a new snd_hdac_device.regmap_lock
mutex that is applied for each snd_hdac_regmap_*() call, including
read, write and update helpers. The mutex is applied carefully so
that it won't block the self-power-up procedure in the helper
function. Also, this assures the protection for the accesses without
regmap, too.
The snd_hdac_regmap_update_raw() is refactored to use the standard
regmap_update_bits_check() function instead of the open-code. The
non-regmap case is still open-coded but it's an easy part. The all
read and write operations are in the single mutex protection, so it's
now race-free.
In addition, a couple of new helper functions are added:
snd_hdac_regmap_update_raw_once() and snd_hdac_regmap_sync(). Both
are called from HD-audio legacy driver. The former is to initialize
the given verb bits but only once when it's not initialized yet. Due
to this condition, the function invokes regcache_cache_only(), and
it's now performed inside the regmap_lock (formerly it was racy) too.
The latter function is for simply invoking regcache_sync() inside the
regmap_lock, which is called from the codec resume call path.
Along with that, the HD-audio codec driver code is slightly modified /
simplified to adapt those new functions.
And finally, snd_hdac_regmap_read_raw(), *_write_raw(), etc are
rewritten with the helper macro. It's just for simplification because
the code logic is identical among all those functions.
Tested-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200109090104.26073-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-01-09 09:01:04 +00:00
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int snd_hdac_regmap_update_raw_once(struct hdac_device *codec, unsigned int reg,
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unsigned int mask, unsigned int val);
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void snd_hdac_regmap_sync(struct hdac_device *codec);
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
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/**
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* snd_hdac_regmap_encode_verb - encode the verb to a pseudo register
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* @nid: widget NID
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* @verb: codec verb
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*
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* Returns an encoded pseudo register.
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*/
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#define snd_hdac_regmap_encode_verb(nid, verb) \
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(((verb) << 8) | 0x80000 | ((unsigned int)(nid) << 20))
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/**
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* snd_hdac_regmap_encode_amp - encode the AMP verb to a pseudo register
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* @nid: widget NID
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* @ch: channel (left = 0, right = 1)
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* @dir: direction (#HDA_INPUT, #HDA_OUTPUT)
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* @idx: input index value
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*
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* Returns an encoded pseudo register.
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*/
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#define snd_hdac_regmap_encode_amp(nid, ch, dir, idx) \
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(snd_hdac_regmap_encode_verb(nid, AC_VERB_GET_AMP_GAIN_MUTE) | \
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((ch) ? AC_AMP_GET_RIGHT : AC_AMP_GET_LEFT) | \
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((dir) == HDA_OUTPUT ? AC_AMP_GET_OUTPUT : AC_AMP_GET_INPUT) | \
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(idx))
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2015-03-04 19:43:20 +00:00
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/**
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* snd_hdac_regmap_encode_amp_stereo - encode a pseudo register for stereo AMPs
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* @nid: widget NID
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* @dir: direction (#HDA_INPUT, #HDA_OUTPUT)
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* @idx: input index value
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*
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* Returns an encoded pseudo register.
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*/
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#define snd_hdac_regmap_encode_amp_stereo(nid, dir, idx) \
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(snd_hdac_regmap_encode_verb(nid, AC_VERB_GET_AMP_GAIN_MUTE) | \
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AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT | /* both bits set! */ \
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((dir) == HDA_OUTPUT ? AC_AMP_GET_OUTPUT : AC_AMP_GET_INPUT) | \
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(idx))
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
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/**
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* snd_hdac_regmap_write - Write a verb with caching
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* @nid: codec NID
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* @reg: verb to write
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* @val: value to write
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*
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2015-09-28 10:19:08 +00:00
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* For writing an amp value, use snd_hdac_regmap_update_amp().
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
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*/
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static inline int
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snd_hdac_regmap_write(struct hdac_device *codec, hda_nid_t nid,
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unsigned int verb, unsigned int val)
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{
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unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
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return snd_hdac_regmap_write_raw(codec, cmd, val);
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}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* snd_hda_regmap_update - Update a verb value with caching
|
|
|
|
|
* @nid: codec NID
|
|
|
|
|
* @verb: verb to update
|
|
|
|
|
* @mask: bit mask to update
|
|
|
|
|
* @val: value to update
|
|
|
|
|
*
|
2015-09-28 10:19:08 +00:00
|
|
|
* For updating an amp value, use snd_hdac_regmap_update_amp().
|
ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
|
|
|
*/
|
|
|
|
|
static inline int
|
|
|
|
|
snd_hdac_regmap_update(struct hdac_device *codec, hda_nid_t nid,
|
|
|
|
|
unsigned int verb, unsigned int mask,
|
|
|
|
|
unsigned int val)
|
|
|
|
|
{
|
|
|
|
|
unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
|
|
|
|
|
|
|
|
|
|
return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* snd_hda_regmap_read - Read a verb with caching
|
|
|
|
|
* @nid: codec NID
|
|
|
|
|
* @verb: verb to read
|
|
|
|
|
* @val: pointer to store the value
|
|
|
|
|
*
|
|
|
|
|
* For reading an amp value, use snd_hda_regmap_get_amp().
|
|
|
|
|
*/
|
|
|
|
|
static inline int
|
|
|
|
|
snd_hdac_regmap_read(struct hdac_device *codec, hda_nid_t nid,
|
|
|
|
|
unsigned int verb, unsigned int *val)
|
|
|
|
|
{
|
|
|
|
|
unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
|
|
|
|
|
|
|
|
|
|
return snd_hdac_regmap_read_raw(codec, cmd, val);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* snd_hdac_regmap_get_amp - Read AMP value
|
|
|
|
|
* @codec: HD-audio codec
|
|
|
|
|
* @nid: NID to read the AMP value
|
|
|
|
|
* @ch: channel (left=0 or right=1)
|
|
|
|
|
* @direction: #HDA_INPUT or #HDA_OUTPUT
|
|
|
|
|
* @index: the index value (only for input direction)
|
|
|
|
|
* @val: the pointer to store the value
|
|
|
|
|
*
|
|
|
|
|
* Read AMP value. The volume is between 0 to 0x7f, 0x80 = mute bit.
|
|
|
|
|
* Returns the value or a negative error.
|
|
|
|
|
*/
|
|
|
|
|
static inline int
|
|
|
|
|
snd_hdac_regmap_get_amp(struct hdac_device *codec, hda_nid_t nid,
|
|
|
|
|
int ch, int dir, int idx)
|
|
|
|
|
{
|
|
|
|
|
unsigned int cmd = snd_hdac_regmap_encode_amp(nid, ch, dir, idx);
|
|
|
|
|
int err, val;
|
|
|
|
|
|
|
|
|
|
err = snd_hdac_regmap_read_raw(codec, cmd, &val);
|
|
|
|
|
return err < 0 ? err : val;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* snd_hdac_regmap_update_amp - update the AMP value
|
|
|
|
|
* @codec: HD-audio codec
|
|
|
|
|
* @nid: NID to read the AMP value
|
|
|
|
|
* @ch: channel (left=0 or right=1)
|
|
|
|
|
* @direction: #HDA_INPUT or #HDA_OUTPUT
|
|
|
|
|
* @idx: the index value (only for input direction)
|
|
|
|
|
* @mask: bit mask to set
|
|
|
|
|
* @val: the bits value to set
|
|
|
|
|
*
|
|
|
|
|
* Update the AMP value with a bit mask.
|
|
|
|
|
* Returns 0 if the value is unchanged, 1 if changed, or a negative error.
|
|
|
|
|
*/
|
|
|
|
|
static inline int
|
|
|
|
|
snd_hdac_regmap_update_amp(struct hdac_device *codec, hda_nid_t nid,
|
|
|
|
|
int ch, int dir, int idx, int mask, int val)
|
|
|
|
|
{
|
|
|
|
|
unsigned int cmd = snd_hdac_regmap_encode_amp(nid, ch, dir, idx);
|
|
|
|
|
|
|
|
|
|
return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
|
|
|
|
|
}
|
|
|
|
|
|
2015-03-04 19:43:20 +00:00
|
|
|
/**
|
|
|
|
|
* snd_hdac_regmap_get_amp_stereo - Read stereo AMP values
|
|
|
|
|
* @codec: HD-audio codec
|
|
|
|
|
* @nid: NID to read the AMP value
|
|
|
|
|
* @ch: channel (left=0 or right=1)
|
|
|
|
|
* @direction: #HDA_INPUT or #HDA_OUTPUT
|
|
|
|
|
* @index: the index value (only for input direction)
|
|
|
|
|
* @val: the pointer to store the value
|
|
|
|
|
*
|
|
|
|
|
* Read stereo AMP values. The lower byte is left, the upper byte is right.
|
|
|
|
|
* Returns the value or a negative error.
|
|
|
|
|
*/
|
|
|
|
|
static inline int
|
|
|
|
|
snd_hdac_regmap_get_amp_stereo(struct hdac_device *codec, hda_nid_t nid,
|
|
|
|
|
int dir, int idx)
|
|
|
|
|
{
|
|
|
|
|
unsigned int cmd = snd_hdac_regmap_encode_amp_stereo(nid, dir, idx);
|
|
|
|
|
int err, val;
|
|
|
|
|
|
|
|
|
|
err = snd_hdac_regmap_read_raw(codec, cmd, &val);
|
|
|
|
|
return err < 0 ? err : val;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* snd_hdac_regmap_update_amp_stereo - update the stereo AMP value
|
|
|
|
|
* @codec: HD-audio codec
|
|
|
|
|
* @nid: NID to read the AMP value
|
|
|
|
|
* @direction: #HDA_INPUT or #HDA_OUTPUT
|
|
|
|
|
* @idx: the index value (only for input direction)
|
|
|
|
|
* @mask: bit mask to set
|
|
|
|
|
* @val: the bits value to set
|
|
|
|
|
*
|
|
|
|
|
* Update the stereo AMP value with a bit mask.
|
|
|
|
|
* The lower byte is left, the upper byte is right.
|
|
|
|
|
* Returns 0 if the value is unchanged, 1 if changed, or a negative error.
|
|
|
|
|
*/
|
|
|
|
|
static inline int
|
|
|
|
|
snd_hdac_regmap_update_amp_stereo(struct hdac_device *codec, hda_nid_t nid,
|
|
|
|
|
int dir, int idx, int mask, int val)
|
|
|
|
|
{
|
|
|
|
|
unsigned int cmd = snd_hdac_regmap_encode_amp_stereo(nid, dir, idx);
|
|
|
|
|
|
|
|
|
|
return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
|
|
|
|
|
}
|
|
|
|
|
|
2015-04-04 10:17:28 +00:00
|
|
|
/**
|
|
|
|
|
* snd_hdac_regmap_sync_node - sync the widget node attributes
|
|
|
|
|
* @codec: HD-audio codec
|
|
|
|
|
* @nid: NID to sync
|
|
|
|
|
*/
|
|
|
|
|
static inline void
|
|
|
|
|
snd_hdac_regmap_sync_node(struct hdac_device *codec, hda_nid_t nid)
|
|
|
|
|
{
|
|
|
|
|
regcache_mark_dirty(codec->regmap);
|
|
|
|
|
regcache_sync_region(codec->regmap, nid << 20, ((nid + 1) << 20) - 1);
|
|
|
|
|
}
|
|
|
|
|
|
ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 13:42:38 +00:00
|
|
|
#endif /* __SOUND_HDA_REGMAP_H */
|