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| author | Gergo Koteles <soyer@irl.hu> | 2023-12-22 00:48:56 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-12-29 13:41:04 +0100 |
| commit | 6dad45f4d28977bd1948973107cf325d431e5b7e (patch) | |
| tree | 15fb3c806889b50e4ae09d50658a8425d3da6758 /io_uring | |
| parent | 916d051730ae48aef8b588fd096fefca4bc0590a (diff) | |
| download | linux-6dad45f4d28977bd1948973107cf325d431e5b7e.tar.gz linux-6dad45f4d28977bd1948973107cf325d431e5b7e.tar.bz2 linux-6dad45f4d28977bd1948973107cf325d431e5b7e.zip | |
ALSA: hda/tas2781: do not use regcache
There are two problems with using regcache in this module.
The amplifier has 3 addressing levels (BOOK, PAGE, REG). The firmware
contains blocks that must be written to BOOK 0x8C. The regcache doesn't
know anything about BOOK, so regcache_sync writes invalid values to the
actual BOOK.
The module handles 2 or more separate amplifiers. The amplifiers have
different register values, and the module uses only one regmap/regcache
for all the amplifiers. The regcache_sync only writes the last amplifier
used.
The module successfully restores all the written register values (RC
profile, program, configuration, calibration) without regcache.
Remove regcache functions and set regmap cache_type to REGCACHE_NONE.
Link: https://lore.kernel.org/r/21a183b5a08cb23b193af78d4b1114cc59419272.1701906455.git.soyer@irl.hu/
Fixes: 5be27f1e3ec9 ("ALSA: hda/tas2781: Add tas2781 HDA driver")
Acked-by: Mark Brown <broonie@kernel.org>
CC: stable@vger.kernel.org
Signed-off-by: Gergo Koteles <soyer@irl.hu>
Link: https://lore.kernel.org/r/491aeed0e2eecc3b704ec856f815db21bad3ba0e.1703202126.git.soyer@irl.hu
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'io_uring')
0 files changed, 0 insertions, 0 deletions