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msm: camera: disable power collapse when camera is working

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To avoid CPU goes into power collapse mode,
set PM QOS latency to 100 when opening camera,
and reset it to -1 when closing camera.

Change-Id: I4472f64ac853d822a77367b843287a9a7c9d83d9
Signed-off-by: Haizhou Fan <haizhoufan@codeaurora.org>
This commit is contained in:
Haizhou Fan
2018-12-08 00:54:04 +08:00
parent 8af5dec75f
commit dbf0ab56d7
1 changed files with 49 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/media/platform/msm/camera/cam_req_mgr/cam_req_mgr_dev.c Normal file → Executable file
View File

@@ -26,11 +26,15 @@
#include "cam_mem_mgr.h"
#include "cam_debug_util.h"
#include <linux/slub_def.h>
#include <linux/pm_qos.h>
#define CAM_REQ_MGR_EVENT_MAX 30
#define CAMERA_DISABLE_PC_LATENCY 100
#define CAMERA_ENABLE_PC_LATENCY PM_QOS_DEFAULT_VALUE
static struct cam_req_mgr_device g_dev;
struct kmem_cache *g_cam_req_mgr_timer_cachep;
static struct pm_qos_request cam_pm_qos_request;
static int cam_media_device_setup(struct device *dev)
{
@@ -97,12 +101,39 @@ static void cam_v4l2_device_cleanup(void)
g_dev.v4l2_dev = NULL;
}
static void cam_pm_qos_add_request(void)
{
pm_qos_add_request(&cam_pm_qos_request, PM_QOS_CPU_DMA_LATENCY,
PM_QOS_DEFAULT_VALUE);
}
static void cam_pm_qos_remove_request(void)
{
CAM_INFO(CAM_SENSOR, "%s: remove request", __func__);
pm_qos_remove_request(&cam_pm_qos_request);
}
static void cam_pm_qos_update_request(int val) {
CAM_INFO(CAM_SENSOR, "%s: update request %d", __func__, val);
pm_qos_update_request(&cam_pm_qos_request, val);
}
static int cam_req_mgr_open(struct file *filep)
{
int rc;
mutex_lock(&g_dev.cam_lock);
if (g_dev.open_cnt >= 1) {
g_dev.open_cnt++;
if (g_dev.open_cnt == 1) {
CAM_INFO(CAM_CRM, "%s:%d disalbe lpm", __func__, __LINE__);
/* register msm_v4l2_pm_qos_request */
cam_pm_qos_add_request();
cam_pm_qos_update_request(CAMERA_DISABLE_PC_LATENCY);
}
if (g_dev.open_cnt > 1) {
rc = -EALREADY;
goto end;
}
@@ -117,10 +148,8 @@ static int cam_req_mgr_open(struct file *filep)
g_dev.cam_eventq = filep->private_data;
spin_unlock_bh(&g_dev.cam_eventq_lock);
g_dev.open_cnt++;
rc = cam_mem_mgr_init();
if (rc) {
g_dev.open_cnt--;
CAM_ERR(CAM_CRM, "mem mgr init failed");
goto mem_mgr_init_fail;
}
@@ -131,6 +160,12 @@ static int cam_req_mgr_open(struct file *filep)
mem_mgr_init_fail:
v4l2_fh_release(filep);
end:
if (g_dev.open_cnt <= 1) {
/* remove msm_v4l2_pm_qos_request */
cam_pm_qos_update_request(CAMERA_ENABLE_PC_LATENCY);
cam_pm_qos_remove_request();
}
g_dev.open_cnt--;
mutex_unlock(&g_dev.cam_lock);
return rc;
}
@@ -164,8 +199,13 @@ static int cam_req_mgr_close(struct file *filep)
return -EINVAL;
}
g_dev.open_cnt--;
if (g_dev.open_cnt > 0) {
CAM_ERR(CAM_CRM, "%s:%d open_cnt %d", __func__, __LINE__, g_dev.open_cnt);
mutex_unlock(&g_dev.cam_lock);
return 0;
}
cam_req_mgr_handle_core_shutdown();
list_for_each_entry(sd, &g_dev.v4l2_dev->subdevs, list) {
if (!(sd->flags & V4L2_SUBDEV_FL_HAS_DEVNODE))
continue;
@@ -176,7 +216,6 @@ static int cam_req_mgr_close(struct file *filep)
}
}
g_dev.open_cnt--;
v4l2_fh_release(filep);
spin_lock_bh(&g_dev.cam_eventq_lock);
@@ -185,6 +224,11 @@ static int cam_req_mgr_close(struct file *filep)
cam_req_mgr_util_free_hdls();
cam_mem_mgr_deinit();
CAM_INFO(CAM_CRM, "%s:%d enable lpm", __func__, __LINE__);
cam_pm_qos_update_request(CAMERA_ENABLE_PC_LATENCY);
/* remove msm_v4l2_pm_qos_request */
cam_pm_qos_remove_request();
mutex_unlock(&g_dev.cam_lock);
return 0;