ASoC: rsnd: adg: make rsnd_adg_clk_control() idempotent

Browse source

rsnd_adg_clk_control() is asymmetric on the disable path: the clkin
clocks are guarded by clkin_rate[], but the "adg" clock is disabled
unconditionally. If an enable attempt fails (for example a clkin
failing to turn on during resume), the error path correctly rolls
everything back, but rsnd_resume() ignores the return value, so the
following system suspend calls rsnd_adg_clk_disable() again and
underflows the "adg" clock enable count:

  adg_0_clks1 already disabled
  WARNING: drivers/clk/clk.c:1188 clk_core_disable+0xa4/0xac
  Call trace:
   clk_core_disable+0xa4/0xac (P)
   clk_disable+0x30/0x4c
   rsnd_adg_clk_control+0x9c/0x2cc
   rsnd_suspend+0x20/0x74
   device_suspend+0x140/0x3ec
   dpm_suspend+0x168/0x270

Track the enable state explicitly and bail out of redundant
enable/disable calls, mirroring what is already done for the per-SSI
clock prepare state. A failed enable leaves the state as disabled, so
the next suspend becomes a no-op and the next resume retries cleanly.

Fixes: 47899d53f8 ("ASoC: rsnd: adg: Add per-SSI ADG and SSIF supply clock management")
Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/20260610164704.2211321-1-john.madieu.xa@bp.renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

...

This commit is contained in:

John Madieu 2026-06-10 16:47:04 +00:00 • committed by Mark Brown

parent 95edf2dbb4

commit ed0abc8be2

No known key found for this signature in database

GPG key ID: 24D68B725D5487D0

1 changed files with 28 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

29

sound/soc/renesas/rcar/adg.c

View file