From: Ricardo Rivera-Matos rriveram@opensource.cirrus.com
[ Upstream commit a0ffa8115e1ea9786b03edc3f431d2f4ef3e7a2e ]
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.cirru... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/cs35l45.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/sound/soc/codecs/cs35l45.c b/sound/soc/codecs/cs35l45.c index 310747b7689d3..9b9fc2d491089 100644 --- a/sound/soc/codecs/cs35l45.c +++ b/sound/soc/codecs/cs35l45.c @@ -775,6 +775,8 @@ 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);
@@ -795,6 +797,8 @@ 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);