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msm: camera: common: Add common wait and poll interface

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In current implementation, each driver call wait_for_completion_timeout
and readl_poll_timeout with own timeout values.
In case of slow environments like presil, lot of hacks are needed to
change the timeouts for each driver. It needs multiple code changes
and compilations, thus consuming time.
This commit implements a common interface to call
wait_for_completion_timeout and readl_poll_timeout.
Debug variable is also introduced to
change the timeout value. This will help to change the timeout
without compilations and changes at multiple places.

Change-Id: Iba51e0805a49ed325147a12688c2fe6619bb68e6
CRs-Fixed: 2830502
Signed-off-by: Gaurav Jindal <gjindal@codeaurora.org>
This commit is contained in:
Gaurav Jindal
2021-02-12 16:38:58 +05:30
parent 025842520f
commit bc400e47fa
26 changed files with 261 additions and 116 deletions
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59
drivers/cam_utils/cam_common_util.c
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@@ -1,15 +1,21 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
*/
#include <linux/string.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/completion.h>
#include <linux/module.h>
#include <linux/iopoll.h>
#include <linux/moduleparam.h>
#include "cam_common_util.h"
#include "cam_debug_util.h"
static uint timeout_multiplier = 1;
module_param(timeout_multiplier, uint, 0644);
int cam_common_util_get_string_index(const char **strings,
uint32_t num_strings, const char *matching_string, uint32_t *index)
{
@@ -48,3 +54,52 @@ uint32_t cam_common_util_remove_duplicate_arr(int32_t *arr, uint32_t num)
return wr_idx;
}
unsigned long cam_common_wait_for_completion_timeout(
struct completion *complete,
unsigned long timeout_jiffies)
{
unsigned long wait_jiffies;
unsigned long rem_jiffies;
if (!complete) {
CAM_ERR(CAM_UTIL, "Null complete pointer");
return 0;
}
if (timeout_multiplier < 1)
timeout_multiplier = 1;
wait_jiffies = timeout_jiffies * timeout_multiplier;
rem_jiffies = wait_for_completion_timeout(
complete, wait_jiffies);
return rem_jiffies;
}
int cam_common_read_poll_timeout(
void __iomem *addr,
unsigned long delay,
unsigned long timeout,
uint32_t mask,
uint32_t check_val,
uint32_t *status)
{
unsigned long wait_time_us;
int rc = -EINVAL;
if (!addr || !status) {
CAM_ERR(CAM_UTIL, "Invalid param addr: %pK status: %pK",
addr, status);
return rc;
}
if (timeout_multiplier < 1)
timeout_multiplier = 1;
wait_time_us = timeout * timeout_multiplier;
rc = readl_poll_timeout(addr,
*status, (*status & mask) == check_val, delay, wait_time_us);
return rc;
}