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

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>

drivers/cam_sensor_module/cam_cci/cam_cci_core.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/module.h>
@@ -46,7 +46,7 @@ static void cam_cci_flush_queue(struct cci_device *cci_dev,
 	if (!cci_dev->cci_master_info[master].status)
 		reinit_completion(&cci_dev->cci_master_info[master]
 			.reset_complete);
-	if (!wait_for_completion_timeout(
+	if (!cam_common_wait_for_completion_timeout(
 		&cci_dev->cci_master_info[master].reset_complete,
 		CCI_TIMEOUT)) {
 		CAM_DBG(CAM_CCI,
@@ -66,7 +66,7 @@ static void cam_cci_flush_queue(struct cci_device *cci_dev,
 				base + CCI_RESET_CMD_ADDR);
 
 		/* wait for reset done irq */
-		if (!wait_for_completion_timeout(
+		if (!cam_common_wait_for_completion_timeout(
 			&cci_dev->cci_master_info[master].reset_complete,
 			CCI_TIMEOUT)) {
 			rc = -EINVAL;
@@ -127,7 +127,7 @@ static int32_t cam_cci_validate_queue(struct cci_device *cci_dev,
 		atomic_set(&cci_dev->cci_master_info[master].q_free[queue], 1);
 		spin_unlock_irqrestore(
 			&cci_dev->cci_master_info[master].lock_q[queue], flags);
-		if (!wait_for_completion_timeout(
+		if (!cam_common_wait_for_completion_timeout(
 			&cci_dev->cci_master_info[master].report_q[queue],
 			CCI_TIMEOUT)) {
 			CAM_ERR(CAM_CCI,
@@ -270,7 +270,7 @@ static uint32_t cam_cci_wait(struct cci_device *cci_dev,
 		return -EINVAL;
 	}
 
-	if (!wait_for_completion_timeout(
+	if (!cam_common_wait_for_completion_timeout(
 		&cci_dev->cci_master_info[master].report_q[queue],
 		CCI_TIMEOUT)) {
 		cam_cci_dump_registers(cci_dev, master, queue);
@@ -1085,7 +1085,7 @@ static int32_t cam_cci_burst_read(struct v4l2_subdev *sd,
 	CAM_DBG(CAM_CCI, "waiting for threshold [exp_words %d]", exp_words);
 
 	while (total_read_words != exp_words) {
-		rem_jiffies = wait_for_completion_timeout(
+		rem_jiffies = cam_common_wait_for_completion_timeout(
 			&cci_dev->cci_master_info[master].th_complete,
 			CCI_TIMEOUT);
 		if (!rem_jiffies) {
@@ -1174,7 +1174,7 @@ static int32_t cam_cci_burst_read(struct v4l2_subdev *sd,
 		    * wait is to compensate for the complete invoked for
 		    * RD_DONE exclusively.
 		    */
-			rem_jiffies = wait_for_completion_timeout(
+			rem_jiffies = cam_common_wait_for_completion_timeout(
 			&cci_dev->cci_master_info[master].rd_done,
 			CCI_TIMEOUT);
 			if (!rem_jiffies) {
@@ -1355,7 +1355,7 @@ static int32_t cam_cci_read(struct v4l2_subdev *sd,
 	CAM_DBG(CAM_CCI, "exp_words to be read: %d",
 		((read_cfg->num_byte / 4) + 1));
 
-	if (!wait_for_completion_timeout(
+	if (!cam_common_wait_for_completion_timeout(
 		&cci_dev->cci_master_info[master].rd_done, CCI_TIMEOUT)) {
 		cam_cci_dump_registers(cci_dev, master, queue);
 

drivers/cam_sensor_module/cam_cci/cam_cci_dev.h

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
- * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
 #ifndef _CAM_CCI_DEV_H_
@@ -32,6 +32,7 @@
 #include "cam_soc_util.h"
 #include "cam_debug_util.h"
 #include "cam_req_mgr_workq.h"
+#include "cam_common_util.h"
 
 #define CCI_I2C_QUEUE_0_SIZE 128
 #define CCI_I2C_QUEUE_1_SIZE 32

drivers/cam_sensor_module/cam_cci/cam_cci_soc.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
  */
 
 #include "cam_cci_dev.h"
@@ -49,7 +49,7 @@ static int cam_cci_init_master(struct cci_device *cci_dev,
 				CCI_M0_RESET_RMSK : CCI_M1_RESET_RMSK,
 				base + CCI_RESET_CMD_ADDR);
 		}
-		if (!wait_for_completion_timeout(
+		if (!cam_common_wait_for_completion_timeout(
 			&cci_dev->cci_master_info[master].reset_complete,
 			CCI_TIMEOUT)) {
 			CAM_ERR(CAM_CCI,