diff options
| author | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2022-10-05 15:46:10 +0100 |
|---|---|---|
| committer | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2023-02-01 16:38:26 +0000 |
| commit | f39ce17b03f4a1514483383408f6bfe17306cb52 (patch) | |
| tree | 846dcdc4d49b852df5cc8ff516ab9e1fac837195 | |
| parent | d9df1f70d1de3e70f8899bbfe4e18a1c423c2f60 (diff) | |
soundwire: qcom: wait for fifo to be empty before
Wait for Fifo to be empty before going to suspend or before bank
switch happens.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
| -rw-r--r-- | drivers/soundwire/qcom.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index a2395949faaf8..fcc279bd5a97a 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -325,6 +325,32 @@ static int swrm_wait_for_wr_fifo_avail(struct qcom_swrm_ctrl *swrm) return 0; } +static bool swrm_wait_for_wr_fifo_done(struct qcom_swrm_ctrl *swrm) +{ + u32 fifo_outstanding_cmds, value; + int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT*2; + + /* Check for fifo overflow during write */ + swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value); + fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value); + + if (fifo_outstanding_cmds) { + while (fifo_retry_count) { + usleep_range(500, 510); + swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value); + fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value); + fifo_retry_count--; + if (fifo_outstanding_cmds == 0) + return true; + } + } else { + return true; + } + + + return false; +} + static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *swrm, u8 cmd_data, u8 dev_addr, u16 reg_addr) { @@ -358,6 +384,7 @@ static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *swrm, u8 cmd_data, swrm_wait_for_wr_fifo_done(swrm); if (cmd_id == SWR_BROADCAST_CMD_ID) { + swrm_wait_for_wr_fifo_done(swrm); /* * sleep for 10ms for MSM soundwire variant to allow broadcast * command to complete. @@ -1124,6 +1151,7 @@ static void qcom_swrm_shutdown(struct snd_pcm_substream *substream, { struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev); + swrm_wait_for_wr_fifo_done(ctrl); sdw_release_stream(ctrl->sruntime[dai->id]); ctrl->sruntime[dai->id] = NULL; pm_runtime_mark_last_busy(ctrl->dev); @@ -1560,6 +1588,7 @@ static int __maybe_unused swrm_runtime_suspend(struct device *dev) struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dev); int ret; + swrm_wait_for_wr_fifo_done(ctrl); if (!ctrl->clock_stop_not_supported) { /* Mask bus clash interrupt */ ctrl->intr_mask &= ~SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET; |