korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-05 01:54:09 +08:00
Code Issues Packages Projects Releases Wiki Activity

soundwire: qcom: wait for fifo to be empty before suspend

Browse Source 
Wait for Fifo to be empty before going to suspend or before bank
switch happens. Just to make sure that all the reads/writes are done.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230525133812.30841-3-srinivas.kandagatla@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Srinivas Kandagatla 2023-05-25 14:38:10 +01:00 committed by Vinod Koul
parent 0a207b6b18
commit 9ac4a4441a
1 changed files with 29 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/soundwire/qcom.c
View File

@ -401,6 +401,32 @@ static int swrm_wait_for_wr_fifo_avail(struct qcom_swrm_ctrl *ctrl)
return 0;
}
static bool swrm_wait_for_wr_fifo_done(struct qcom_swrm_ctrl *ctrl)
{
u32 fifo_outstanding_cmds, value;
int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT;
/* Check for fifo overflow during write */
ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_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);
ctrl->reg_read(ctrl, ctrl->reg_layout[SWRM_REG_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 *ctrl, u8 cmd_data,
u8 dev_addr, u16 reg_addr)
{
@ -431,6 +457,7 @@ static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *ctrl, u8 cmd_data,
usleep_range(150, 155);
if (cmd_id == SWR_BROADCAST_CMD_ID) {
swrm_wait_for_wr_fifo_done(ctrl);
/*
* sleep for 10ms for MSM soundwire variant to allow broadcast
* command to complete.
@ -1227,6 +1254,7 @@ 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);
@ -1685,6 +1713,7 @@ 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;