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soc: swr-mstr: Ignore redundant slave path control command

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Slave could trigger multiple path control api multiple times
after connect/disconnect port. Avoid handling the api without
new connect/disconnect requests to reduce latency.

Change-Id: I4db52fdebfd6b7c0fe3f388f25dfaa4981d5f61c
Signed-off-by: Ramprasad Katkam <katkam@codeaurora.org>
This commit is contained in:
Ramprasad Katkam 2018-09-28 15:54:06 +05:30
parent 662dec1e1e
commit cab8d72ab0
2 changed files with 22 additions and 2 deletions
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23
soc/swr-mstr-ctrl.c
View file

@ -19,6 +19,7 @@
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
@ -58,6 +59,11 @@ enum {
MASTER_ID_RX,
MASTER_ID_TX
};
enum {
ENABLE_PENDING,
DISABLE_PENDING
};
#define TRUE 1
#define FALSE 0
@ -955,18 +961,28 @@ static int swrm_slvdev_datapath_control(struct swr_master *master, bool enable)
bank = get_inactive_bank_num(swrm);
if (enable) {
if (!test_bit(ENABLE_PENDING, &swrm->port_req_pending)) {
dev_dbg(swrm->dev, "%s:No pending connect port req\n",
__func__);
goto exit;
}
clear_bit(ENABLE_PENDING, &swrm->port_req_pending);
ret = swrm_get_port_config(swrm);
if (ret) {
/* cannot accommodate ports */
swrm_cleanup_disabled_port_reqs(master);
pm_runtime_mark_last_busy(swrm->dev);
pm_runtime_put_autosuspend(swrm->dev);
mutex_unlock(&swrm->mlock);
return -EINVAL;
}
/* apply the new port config*/
swrm_apply_port_config(master);
} else {
if (!test_bit(DISABLE_PENDING, &swrm->port_req_pending)) {
dev_dbg(swrm->dev, "%s:No pending disconn port req\n",
__func__);
goto exit;
}
clear_bit(DISABLE_PENDING, &swrm->port_req_pending);
swrm_disable_ports(master, bank);
}
dev_dbg(swrm->dev, "%s: enable: %d, cfg_devs: %d\n",
@ -1019,6 +1035,7 @@ static int swrm_slvdev_datapath_control(struct swr_master *master, bool enable)
pm_runtime_mark_last_busy(swrm->dev);
pm_runtime_put_autosuspend(swrm->dev);
}
exit:
mutex_unlock(&swrm->mlock);
return 0;
}
@ -1095,6 +1112,7 @@ static int swrm_connect_port(struct swr_master *master,
master->port_en_mask |= (1 << mstr_port_id);
}
master->num_port += portinfo->num_port;
set_bit(ENABLE_PENDING, &swrm->port_req_pending);
swr_port_response(master, portinfo->tid);
mutex_unlock(&swrm->mlock);
@ -1155,6 +1173,7 @@ static int swrm_disconnect_port(struct swr_master *master,
mport->req_ch &= ~mstr_ch_mask;
}
master->num_port -= portinfo->num_port;
set_bit(DISABLE_PENDING, &swrm->port_req_pending);
swr_port_response(master, portinfo->tid);
mutex_unlock(&swrm->mlock);

1
soc/swr-mstr-ctrl.h
View file

@ -135,6 +135,7 @@ struct swr_mstr_ctrl {
int slave_status;
struct swrm_mports mport_cfg[SWR_MAX_MSTR_PORT_NUM];
struct list_head port_req_list;
unsigned long port_req_pending;
int state;
struct platform_device *pdev;
int num_rx_chs;