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input: qcom-hv-haptics: Deglitch fifo-empty interrupt

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Check INT_RT_STS in FIFO empty IRQ handler and ignore the interrupt
if FIFO_EMPTY real time status bit is not set.

Change-Id: I7a276fa1d8c79d530fc26f74263e0608096a99f8
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
This commit is contained in:
Fenglin Wu 2020-06-04 15:12:37 +08:00 committed by David Collins
parent 1f31666769
commit bb4c542b49
1 changed files with 15 additions and 1 deletions
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16
drivers/input/misc/qcom-hv-haptics.c
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@ -46,6 +46,9 @@
#define AUTO_RES_ERROR_BIT BIT(1)
#define HPRW_RDY_FAULT_BIT BIT(0)
#define HAP_CFG_INT_RT_STS_REG 0x10
#define FIFO_EMPTY_BIT BIT(1)
/* config register definitions in HAPTICS_CFG module */
#define HAP_CFG_DRV_CTRL_REG 0x47
#define PSTG_DLY_MASK GENMASK(7, 6)
@ -1919,9 +1922,20 @@ static irqreturn_t fifo_empty_irq_handler(int irq, void *data)
struct fifo_cfg *fifo = chip->play.effect->fifo;
struct fifo_play_status *status = &chip->play.fifo_status;
u32 samples_left;
u8 *samples;
u8 *samples, val;
int rc, num;
rc = haptics_read(chip, chip->cfg_addr_base,
HAP_CFG_INT_RT_STS_REG, &val, 1);
if (rc < 0)
return IRQ_HANDLED;
if (!(val & FIFO_EMPTY_BIT)) {
dev_dbg(chip->dev, "Ignore spurious/falling IRQ, INT_RT_STS = %#x\n",
val);
return IRQ_HANDLED;
}
if (atomic_read(&chip->play.fifo_status.written_done) == 1) {
/*
* Check the FIFO real time fill status before stopping