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ASoC: cs35l45: Prevents spinning during runtime suspend

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Masks the "DSP Virtual Mailbox 2 write" interrupt when before
issuing the hibernate command to the DSP. The interrupt is
unmasked when exiting runtime suspend as it is required for
DSP operation.

Without this change the DSP fires an interrupt when hibernating
causing the system spin between runtime suspend and runtime
resume.

Signed-off-by: Ricardo Rivera-Matos <rriveram@opensource.cirrus.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20231206160318.1255034-4-rriveram@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ricardo Rivera-Matos 2023-12-06 10:03:18 -06:00 committed by Mark Brown
parent c3c8b08894
commit a0ffa8115e
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1 changed files with 4 additions and 0 deletions
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4
sound/soc/codecs/cs35l45.c
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@ -947,6 +947,8 @@ static int cs35l45_enter_hibernate(struct cs35l45_private *cs35l45)
cs35l45_setup_hibernate(cs35l45);
regmap_set_bits(cs35l45->regmap, CS35L45_IRQ1_MASK_2, CS35L45_DSP_VIRT2_MBOX_MASK);
// Don't wait for ACK since bus activity would wake the device
regmap_write(cs35l45->regmap, CS35L45_DSP_VIRT1_MBOX_1, CSPL_MBOX_CMD_HIBERNATE);
@ -967,6 +969,8 @@ static int cs35l45_exit_hibernate(struct cs35l45_private *cs35l45)
CSPL_MBOX_CMD_OUT_OF_HIBERNATE);
if (!ret) {
dev_dbg(cs35l45->dev, "Wake success at cycle: %d\n", j);
regmap_clear_bits(cs35l45->regmap, CS35L45_IRQ1_MASK_2,
CS35L45_DSP_VIRT2_MBOX_MASK);
return 0;
}
usleep_range(100, 200);