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authorBryan Wu <pengw@nvidia.com>2015-10-15 13:10:29 -0700
committerMatthew Pedro <mapedro@nvidia.com>2015-10-29 10:52:36 -0700
commitff5bccb61c1f8da1f63451fda88bd1f65dbee5b2 (patch)
tree4f3494c090cc004caec0c96a7028c19b40c05264 /drivers
parentb15d976c0a2e6a3c512001a3be3feaf057655b8b (diff)
media: tegra_camera: introduce 2 kthreads for capture
Use one kthread to start capture a frame and wait for next frame start. Before waiting, it will move the current buffer to another queue which will be handled another kthread. The second kthread (capture_done) will wait for memory output done sync point event and handle the buffer to videobuffer2 framework as capture done. Bug 1686911 Change-Id: Ia092c708ecca3b2e7cbc657a96fd247ea4a00d2f Signed-off-by: Bryan Wu <pengw@nvidia.com> Reviewed-on: http://git-master/r/819177 GVS: Gerrit_Virtual_Submit Reviewed-by: Matthew Pedro <mapedro@nvidia.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/platform/soc_camera/tegra_camera/common.c153
-rw-r--r--drivers/media/platform/soc_camera/tegra_camera/common.h19
-rw-r--r--drivers/media/platform/soc_camera/tegra_camera/vi.c22
-rw-r--r--drivers/media/platform/soc_camera/tegra_camera/vi2.c60
4 files changed, 150 insertions, 104 deletions
diff --git a/drivers/media/platform/soc_camera/tegra_camera/common.c b/drivers/media/platform/soc_camera/tegra_camera/common.c
index 888d0aed96d3..17129d507d88 100644
--- a/drivers/media/platform/soc_camera/tegra_camera/common.c
+++ b/drivers/media/platform/soc_camera/tegra_camera/common.c
@@ -46,8 +46,6 @@ module_param(tpg_mode, int, 0644);
#define TEGRA_CAM_DRV_NAME "vi"
#define TEGRA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5)
-#define TEGRA_SYNCPT_RETRY_COUNT 10
-
static const struct soc_mbus_pixelfmt tegra_camera_yuv_formats[] = {
{
.fourcc = V4L2_PIX_FMT_UYVY,
@@ -203,73 +201,96 @@ static void tegra_camera_deactivate(struct tegra_camera_dev *cam)
cam->cal_done = 0;
}
-static int tegra_camera_capture_frame(struct tegra_camera_dev *cam)
+static int tegra_camera_capture_frame(struct tegra_camera_dev *cam,
+ struct tegra_camera_buffer *buf)
{
- struct vb2_buffer *vb = cam->active;
- struct tegra_camera_buffer *buf = to_tegra_vb(vb);
- struct soc_camera_device *icd = buf->icd;
- struct soc_camera_subdev_desc *ssdesc = &icd->sdesc->subdev_desc;
- struct tegra_camera_platform_data *pdata = ssdesc->drv_priv;
- int port = pdata->port;
- int retry = TEGRA_SYNCPT_RETRY_COUNT;
int err;
/* Setup capture registers */
- cam->ops->capture_setup(cam);
+ cam->ops->capture_setup(cam, buf);
cam->ops->incr_syncpts(cam);
/* MIPI CSI pads calibration after starting capture */
if (cam->ops->mipi_calibration && !cam->cal_done) {
- err = cam->ops->mipi_calibration(cam);
+ err = cam->ops->mipi_calibration(cam, buf);
if (!err)
cam->cal_done = 1;
}
- while (retry) {
- err = cam->ops->capture_start(cam, buf);
- if (err) {
- retry--;
+ /* Issue start capture */
+ cam->ops->capture_start(cam, buf);
+
+ /* Move buffer to capture done queue */
+ spin_lock(&cam->done_lock);
+ list_add_tail(&buf->queue, &cam->done);
+ spin_unlock(&cam->done_lock);
- cam->ops->incr_syncpts(cam);
- if (cam->ops->save_syncpts)
- cam->ops->save_syncpts(cam);
+ /* Wait up kthread for capture done */
+ wake_up_interruptible(&cam->capture_done_wait);
+
+ /* Wait for next frame start */
+ return cam->ops->capture_wait(cam, buf);
+}
+
+static int tegra_camera_kthread_capture_start(void *data)
+{
+ struct tegra_camera_dev *cam = data;
+ struct tegra_camera_buffer *buf;
+ while (1) {
+ try_to_freeze();
+
+ wait_event_interruptible(cam->capture_start_wait,
+ !list_empty(&cam->capture) ||
+ kthread_should_stop());
+ if (kthread_should_stop())
+ break;
+
+ spin_lock(&cam->capture_lock);
+ if (list_empty(&cam->capture)) {
+ spin_unlock(&cam->capture_lock);
continue;
}
- break;
- }
- /* Reset hardware for too many errors */
- if (!retry) {
- tegra_camera_deactivate(cam);
- mdelay(5);
- tegra_camera_activate(cam, icd);
- if (cam->active)
- cam->ops->capture_setup(cam);
+ buf = list_entry(cam->capture.next, struct tegra_camera_buffer,
+ queue);
+ list_del_init(&buf->queue);
+ spin_unlock(&cam->capture_lock);
+
+ tegra_camera_capture_frame(cam, buf);
}
- spin_lock(&cam->videobuf_queue_lock);
+ return 0;
+}
+
+static int tegra_camera_capture_done(struct tegra_camera_dev *cam,
+ struct tegra_camera_buffer *buf)
+{
+ struct vb2_buffer *vb = &buf->vb;
+ struct soc_camera_device *icd = buf->icd;
+ struct soc_camera_subdev_desc *ssdesc = &icd->sdesc->subdev_desc;
+ struct tegra_camera_platform_data *pdata = ssdesc->drv_priv;
+ int port = pdata->port;
+ int err;
+
+ /* Wait for buffer is output to memeory */
+ err = cam->ops->capture_done(cam, port);
- vb = cam->active;
+ /* Buffer is done */
do_gettimeofday(&vb->v4l2_buf.timestamp);
vb->v4l2_buf.field = cam->field;
if (port == TEGRA_CAMERA_PORT_CSI_A)
vb->v4l2_buf.sequence = cam->sequence_a++;
else if (port == TEGRA_CAMERA_PORT_CSI_B)
vb->v4l2_buf.sequence = cam->sequence_b++;
-
vb2_buffer_done(vb, err < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
- list_del_init(&buf->queue);
-
cam->num_frames++;
- spin_unlock(&cam->videobuf_queue_lock);
-
return err;
}
-static int tegra_camera_kthread_capture(void *data)
+static int tegra_camera_kthread_capture_done(void *data)
{
struct tegra_camera_dev *cam = data;
struct tegra_camera_buffer *buf;
@@ -277,25 +298,24 @@ static int tegra_camera_kthread_capture(void *data)
while (1) {
try_to_freeze();
- wait_event_interruptible(cam->wait,
- !list_empty(&cam->capture) ||
+ wait_event_interruptible(cam->capture_done_wait,
+ !list_empty(&cam->done) ||
kthread_should_stop());
- if (kthread_should_stop())
+ if (kthread_should_stop() && list_empty(&cam->done))
break;
- spin_lock(&cam->videobuf_queue_lock);
- if (list_empty(&cam->capture)) {
- cam->active = NULL;
- spin_unlock(&cam->videobuf_queue_lock);
+ spin_lock(&cam->done_lock);
+ if (list_empty(&cam->done)) {
+ spin_unlock(&cam->done_lock);
continue;
}
- buf = list_entry(cam->capture.next, struct tegra_camera_buffer,
+ buf = list_entry(cam->done.next, struct tegra_camera_buffer,
queue);
- cam->active = &buf->vb;
- spin_unlock(&cam->videobuf_queue_lock);
+ list_del_init(&buf->queue);
+ spin_unlock(&cam->done_lock);
- tegra_camera_capture_frame(cam);
+ tegra_camera_capture_done(cam, buf);
}
return 0;
@@ -487,12 +507,12 @@ static void tegra_camera_videobuf_queue(struct vb2_buffer *vb)
struct tegra_camera_dev *cam = ici->priv;
struct tegra_camera_buffer *buf = to_tegra_vb(vb);
- spin_lock(&cam->videobuf_queue_lock);
+ spin_lock(&cam->capture_lock);
list_add_tail(&buf->queue, &cam->capture);
- spin_unlock(&cam->videobuf_queue_lock);
+ spin_unlock(&cam->capture_lock);
/* Wait up kthread for capture */
- wake_up_interruptible(&cam->wait);
+ wake_up_interruptible(&cam->capture_start_wait);
}
static void tegra_camera_videobuf_release(struct vb2_buffer *vb)
@@ -504,10 +524,7 @@ static void tegra_camera_videobuf_release(struct vb2_buffer *vb)
struct tegra_camera_buffer *buf = to_tegra_vb(vb);
struct tegra_camera_dev *cam = ici->priv;
- spin_lock(&cam->videobuf_queue_lock);
-
- if (cam->active == vb)
- cam->active = NULL;
+ spin_lock(&cam->done_lock);
/*
* Doesn't hurt also if the list is empty, but it hurts, if queuing the
@@ -516,7 +533,7 @@ static void tegra_camera_videobuf_release(struct vb2_buffer *vb)
if (buf->queue.next)
list_del_init(&buf->queue);
- spin_unlock(&cam->videobuf_queue_lock);
+ spin_unlock(&cam->done_lock);
}
static int tegra_camera_videobuf_init(struct vb2_buffer *vb)
@@ -535,9 +552,15 @@ static int tegra_camera_start_streaming(struct vb2_queue *q, unsigned int count)
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct tegra_camera_dev *cam = ici->priv;
- /* Start kthread to capture data to buffer */
- cam->kthread_capture = kthread_run(tegra_camera_kthread_capture, cam,
- dev_name(&cam->ndev->dev));
+ /* Start kthread to capture frame */
+ cam->kthread_capture_start = kthread_run(
+ tegra_camera_kthread_capture_start, cam,
+ "tegra-vi/capture-start");
+
+ /* Start kthread to wait data output to buffer */
+ cam->kthread_capture_done = kthread_run(
+ tegra_camera_kthread_capture_done, cam,
+ "tegra-vi/capture-done");
return 0;
}
@@ -550,12 +573,13 @@ static int tegra_camera_stop_streaming(struct vb2_queue *q)
struct tegra_camera_dev *cam = ici->priv;
struct soc_camera_subdev_desc *ssdesc = &icd->sdesc->subdev_desc;
struct tegra_camera_platform_data *pdata = ssdesc->drv_priv;
- struct tegra_camera_buffer *buf, *nbuf;
int port = pdata->port;
/* Stop the kthread for capture */
- kthread_stop(cam->kthread_capture);
- cam->kthread_capture = NULL;
+ kthread_stop(cam->kthread_capture_start);
+ cam->kthread_capture_start = NULL;
+ kthread_stop(cam->kthread_capture_done);
+ cam->kthread_capture_done = NULL;
cam->ops->capture_stop(cam, port);
@@ -913,8 +937,11 @@ static int tegra_camera_probe(struct platform_device *pdev)
cam->tpg_mode = tpg_mode;
INIT_LIST_HEAD(&cam->capture);
- spin_lock_init(&cam->videobuf_queue_lock);
- init_waitqueue_head(&cam->wait);
+ INIT_LIST_HEAD(&cam->done);
+ spin_lock_init(&cam->capture_lock);
+ spin_lock_init(&cam->done_lock);
+ init_waitqueue_head(&cam->capture_start_wait);
+ init_waitqueue_head(&cam->capture_done_wait);
if (pdev->dev.of_node) {
int cplen;
diff --git a/drivers/media/platform/soc_camera/tegra_camera/common.h b/drivers/media/platform/soc_camera/tegra_camera/common.h
index c27c83cd4558..1d71c2ba39f5 100644
--- a/drivers/media/platform/soc_camera/tegra_camera/common.h
+++ b/drivers/media/platform/soc_camera/tegra_camera/common.h
@@ -62,9 +62,13 @@ struct tegra_camera_ops {
void (*clks_disable)(struct tegra_camera_dev *cam);
void (*capture_clean)(struct tegra_camera_dev *vi2_cam);
- int (*capture_setup)(struct tegra_camera_dev *vi2_cam);
+ int (*capture_setup)(struct tegra_camera_dev *vi2_cam,
+ struct tegra_camera_buffer *buf);
int (*capture_start)(struct tegra_camera_dev *vi2_cam,
struct tegra_camera_buffer *buf);
+ int (*capture_wait)(struct tegra_camera_dev *vi2_cam,
+ struct tegra_camera_buffer *buf);
+ int (*capture_done)(struct tegra_camera_dev *vi2_cam, int port);
int (*capture_stop)(struct tegra_camera_dev *vi2_cam, int port);
void (*init_syncpts)(struct tegra_camera_dev *vi2_cam);
@@ -76,7 +80,8 @@ struct tegra_camera_ops {
void (*deactivate)(struct tegra_camera_dev *vi2_cam);
int (*port_is_valid)(int port);
- int (*mipi_calibration)(struct tegra_camera_dev *vi2_cam);
+ int (*mipi_calibration)(struct tegra_camera_dev *vi2_cam,
+ struct tegra_camera_buffer *buf);
};
struct tegra_camera_dev {
@@ -93,16 +98,20 @@ struct tegra_camera_dev {
struct tegra_camera_ops *ops;
void __iomem *reg_base;
- spinlock_t videobuf_queue_lock;
struct list_head capture;
+ spinlock_t capture_lock;
+ struct list_head done;
+ spinlock_t done_lock;
struct vb2_buffer *active;
struct vb2_alloc_ctx *alloc_ctx;
enum v4l2_field field;
int sequence_a;
int sequence_b;
- struct task_struct *kthread_capture;
- wait_queue_head_t wait;
+ struct task_struct *kthread_capture_start;
+ struct task_struct *kthread_capture_done;
+ wait_queue_head_t capture_start_wait;
+ wait_queue_head_t capture_done_wait;
/* syncpt ids */
u32 syncpt_id_csi_a;
diff --git a/drivers/media/platform/soc_camera/tegra_camera/vi.c b/drivers/media/platform/soc_camera/tegra_camera/vi.c
index 1fa0d098a88a..fe4ea6dcda8a 100644
--- a/drivers/media/platform/soc_camera/tegra_camera/vi.c
+++ b/drivers/media/platform/soc_camera/tegra_camera/vi.c
@@ -773,10 +773,9 @@ static int vi_capture_output_channel_setup(
}
-static int vi_capture_setup(struct tegra_camera_dev *cam)
+static int vi_capture_setup(struct tegra_camera_dev *cam,
+ struct tegra_camera_buffer *buf)
{
- struct vb2_buffer *vb = cam->active;
- struct tegra_camera_buffer *buf = to_tegra_vb(vb);
struct soc_camera_device *icd = buf->icd;
struct soc_camera_subdev_desc *ssdesc = &icd->sdesc->subdev_desc;
struct tegra_camera_platform_data *pdata = ssdesc->drv_priv;
@@ -985,8 +984,7 @@ static int vi_capture_start(struct tegra_camera_dev *cam,
static int vi_capture_stop(struct tegra_camera_dev *cam, int port)
{
- struct tegra_camera_buffer *buf = to_tegra_vb(cam->active);
- int err;
+ int err = 0;
if (vi_port_is_csi(port))
err = nvhost_syncpt_wait_timeout_ext(cam->ndev,
@@ -995,8 +993,6 @@ static int vi_capture_stop(struct tegra_camera_dev *cam, int port)
TEGRA_SYNCPT_VI_WAIT_TIMEOUT,
NULL,
NULL);
- else
- err = 0;
if (err) {
u32 buffer_addr;
@@ -1005,18 +1001,8 @@ static int vi_capture_stop(struct tegra_camera_dev *cam, int port)
dev_warn(&cam->ndev->dev, "Timeout on VI syncpt\n");
- if (buf->output_channel == 0)
- buffer_addr = TC_VI_REG_RD(cam,
+ buffer_addr = TC_VI_REG_RD(cam,
TEGRA_VI_VB0_BASE_ADDRESS_FIRST);
- else if (buf->output_channel == 1)
- buffer_addr = TC_VI_REG_RD(cam,
- TEGRA_VI_VB0_BASE_ADDRESS_SECOND);
- else {
- dev_err(&cam->ndev->dev, "Wrong output channel %d\n",
- buf->output_channel);
- return -EINVAL;
- }
-
dev_warn(&cam->ndev->dev, "buffer_addr = 0x%08x\n",
buffer_addr);
diff --git a/drivers/media/platform/soc_camera/tegra_camera/vi2.c b/drivers/media/platform/soc_camera/tegra_camera/vi2.c
index aaf6d2734ce3..8c1f81a56b7a 100644
--- a/drivers/media/platform/soc_camera/tegra_camera/vi2.c
+++ b/drivers/media/platform/soc_camera/tegra_camera/vi2.c
@@ -785,10 +785,9 @@ static int vi2_capture_setup_csi_1(struct tegra_camera_dev *cam,
return 0;
}
-static int vi2_capture_setup(struct tegra_camera_dev *cam)
+static int vi2_capture_setup(struct tegra_camera_dev *cam,
+ struct tegra_camera_buffer *buf)
{
- struct vb2_buffer *vb = cam->active;
- struct tegra_camera_buffer *buf = to_tegra_vb(vb);
struct soc_camera_device *icd = buf->icd;
struct soc_camera_subdev_desc *ssdesc = &icd->sdesc->subdev_desc;
struct tegra_camera_platform_data *pdata = ssdesc->drv_priv;
@@ -958,7 +957,7 @@ static void vi2_capture_error_status(struct tegra_camera_dev *cam)
}
static int vi2_capture_start(struct tegra_camera_dev *cam,
- struct tegra_camera_buffer *buf)
+ struct tegra_camera_buffer *buf)
{
struct soc_camera_device *icd = buf->icd;
struct soc_camera_subdev_desc *ssdesc = &icd->sdesc->subdev_desc;
@@ -971,7 +970,6 @@ static int vi2_capture_start(struct tegra_camera_dev *cam,
if (err < 0)
return err;
- /* Only wait on CSI frame end syncpt if we're using CSI. */
if (port == TEGRA_CAMERA_PORT_CSI_A) {
if (!nvhost_syncpt_read_ext_check(cam->ndev,
cam->syncpt_id_csi_a, &val))
@@ -982,13 +980,6 @@ static int vi2_capture_start(struct tegra_camera_dev *cam,
TC_VI_REG_WT(cam, TEGRA_VI_CFG_VI_INCR_SYNCPT,
VI_CSI_PPA_FRAME_START | cam->syncpt_id_csi_a);
TC_VI_REG_WT(cam, TEGRA_VI_CSI_0_SINGLE_SHOT, 0x1);
-
- err = nvhost_syncpt_wait_timeout_ext(cam->ndev,
- cam->syncpt_id_csi_a,
- cam->syncpt_csi_a,
- TEGRA_SYNCPT_CSI_WAIT_TIMEOUT,
- NULL,
- NULL);
} else if (port == TEGRA_CAMERA_PORT_CSI_B ||
port == TEGRA_CAMERA_PORT_CSI_C) {
if (!nvhost_syncpt_read_ext_check(cam->ndev,
@@ -1000,7 +991,30 @@ static int vi2_capture_start(struct tegra_camera_dev *cam,
TC_VI_REG_WT(cam, TEGRA_VI_CFG_VI_INCR_SYNCPT,
VI_CSI_PPB_FRAME_START | cam->syncpt_id_csi_b);
TC_VI_REG_WT(cam, TEGRA_VI_CSI_1_SINGLE_SHOT, 0x1);
+ }
+
+ return err;
+}
+
+static int vi2_capture_wait(struct tegra_camera_dev *cam,
+ struct tegra_camera_buffer *buf)
+{
+ struct soc_camera_device *icd = buf->icd;
+ struct soc_camera_subdev_desc *ssdesc = &icd->sdesc->subdev_desc;
+ struct tegra_camera_platform_data *pdata = ssdesc->drv_priv;
+ int port = pdata->port;
+ int err = 0;
+ /* Only wait on CSI frame end syncpt if we're using CSI. */
+ if (port == TEGRA_CAMERA_PORT_CSI_A) {
+ err = nvhost_syncpt_wait_timeout_ext(cam->ndev,
+ cam->syncpt_id_csi_a,
+ cam->syncpt_csi_a,
+ TEGRA_SYNCPT_CSI_WAIT_TIMEOUT,
+ NULL,
+ NULL);
+ } else if (port == TEGRA_CAMERA_PORT_CSI_B ||
+ port == TEGRA_CAMERA_PORT_CSI_C) {
err = nvhost_syncpt_wait_timeout_ext(cam->ndev,
cam->syncpt_id_csi_b,
cam->syncpt_csi_b,
@@ -1030,7 +1044,7 @@ static int vi2_capture_start(struct tegra_camera_dev *cam,
return err;
}
-static int vi2_capture_stop(struct tegra_camera_dev *cam, int port)
+static int vi2_capture_done(struct tegra_camera_dev *cam, int port)
{
u32 val;
int err = 0;
@@ -1060,7 +1074,6 @@ static int vi2_capture_stop(struct tegra_camera_dev *cam, int port)
TEGRA_SYNCPT_CSI_WAIT_TIMEOUT,
NULL,
NULL);
- TC_VI_REG_WT(cam, TEGRA_CSI_PIXEL_STREAM_PPA_COMMAND, 0xf002);
} else if (port == TEGRA_CAMERA_PORT_CSI_B ||
port == TEGRA_CAMERA_PORT_CSI_C) {
if (!nvhost_syncpt_read_ext_check(cam->ndev,
@@ -1087,12 +1100,22 @@ static int vi2_capture_stop(struct tegra_camera_dev *cam, int port)
TEGRA_SYNCPT_CSI_WAIT_TIMEOUT,
NULL,
NULL);
- TC_VI_REG_WT(cam, TEGRA_CSI_PIXEL_STREAM_PPB_COMMAND, 0xf002);
}
return err;
}
+static int vi2_capture_stop(struct tegra_camera_dev *cam, int port)
+{
+ u32 reg = (port == TEGRA_CAMERA_PORT_CSI_A) ?
+ TEGRA_CSI_PIXEL_STREAM_PPA_COMMAND :
+ TEGRA_CSI_PIXEL_STREAM_PPB_COMMAND;
+
+ TC_VI_REG_WT(cam, reg, 0xf002);
+
+ return 0;
+}
+
/* Reset VI2/CSI2 when activating, no sepecial ops for deactiving */
static void vi2_sw_reset(struct tegra_camera_dev *cam)
{
@@ -1104,13 +1127,12 @@ static void vi2_sw_reset(struct tegra_camera_dev *cam)
udelay(10);
}
-static int vi2_mipi_calibration(struct tegra_camera_dev *cam)
+static int vi2_mipi_calibration(struct tegra_camera_dev *cam,
+ struct tegra_camera_buffer *buf)
{
void __iomem *mipi_cal;
struct regmap *regs;
struct platform_device *pdev = cam->ndev;
- struct vb2_buffer *vb = cam->active;
- struct tegra_camera_buffer *buf = to_tegra_vb(vb);
struct soc_camera_device *icd = buf->icd;
struct soc_camera_subdev_desc *ssdesc = &icd->sdesc->subdev_desc;
struct tegra_camera_platform_data *pdata = ssdesc->drv_priv;
@@ -1253,6 +1275,8 @@ struct tegra_camera_ops vi2_ops = {
.capture_clean = vi2_capture_clean,
.capture_setup = vi2_capture_setup,
.capture_start = vi2_capture_start,
+ .capture_wait = vi2_capture_wait,
+ .capture_done = vi2_capture_done,
.capture_stop = vi2_capture_stop,
.activate = vi2_sw_reset,