On Fri, 22 Dec 2023 00:48:56 +0100, Gergo Koteles wrote:
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/21a183b5a08cb23b193af78d4b1114cc59419272.170190645...
Fixes: 5be27f1e3ec9 ("ALSA: hda/tas2781: Add tas2781 HDA driver") CC: stable@vger.kernel.org Signed-off-by: Gergo Koteles soyer@irl.hu
Applied to for-linus branch now. Thanks.
Takashi