With this patch, vivid capture thread can now generate reduced
fps by factor of 1000 / 1001. This is controlled using a boolean
VIVID_CID_REDUCED_FPS added in vivid control. For reduced fps,
capture time is controlled by scaling down timeperframe_vid_cap
with a factor of 1000 / 1001 if VIVID_CID_REDUCED_FPS is true.
Cc: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Signed-off-by: Prashant Laddha <prladdha@xxxxxxxxx>
---
drivers/media/platform/vivid/vivid-core.h | 1 +
drivers/media/platform/vivid/vivid-ctrls.c | 15 +++++++++++++++
drivers/media/platform/vivid/vivid-vid-cap.c | 7 ++++++-
3 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/vivid/vivid-core.h b/drivers/media/platform/vivid/vivid-core.h
index c72349c..4a2c8b7 100644
--- a/drivers/media/platform/vivid/vivid-core.h
+++ b/drivers/media/platform/vivid/vivid-core.h
@@ -263,6 +263,7 @@ struct vivid_dev {
bool vflip;
bool vbi_cap_interlaced;
bool loop_video;
+ bool reduced_fps;
/* Framebuffer */
unsigned long video_pbase;
diff --git a/drivers/media/platform/vivid/vivid-ctrls.c b/drivers/media/platform/vivid/vivid-ctrls.c
index 339c8b7..6becdfe 100644
--- a/drivers/media/platform/vivid/vivid-ctrls.c
+++ b/drivers/media/platform/vivid/vivid-ctrls.c
@@ -78,6 +78,7 @@
#define VIVID_CID_TIME_WRAP (VIVID_CID_VIVID_BASE + 39)
#define VIVID_CID_MAX_EDID_BLOCKS (VIVID_CID_VIVID_BASE + 40)
#define VIVID_CID_PERCENTAGE_FILL (VIVID_CID_VIVID_BASE + 41)
+#define VIVID_CID_REDUCED_FPS (VIVID_CID_VIVID_BASE + 42)
#define VIVID_CID_STD_SIGNAL_MODE (VIVID_CID_VIVID_BASE + 60)
#define VIVID_CID_STANDARD (VIVID_CID_VIVID_BASE + 61)
@@ -422,6 +423,10 @@ static int vivid_vid_cap_s_ctrl(struct v4l2_ctrl *ctrl)
dev->sensor_vflip = ctrl->val;
tpg_s_vflip(&dev->tpg, dev->sensor_vflip ^ dev->vflip);
break;
+ case VIVID_CID_REDUCED_FPS:
+ dev->reduced_fps = ctrl->val;
+ vivid_update_format_cap(dev, true);
+ break;
case VIVID_CID_HAS_CROP_CAP:
dev->has_crop_cap = ctrl->val;
vivid_update_format_cap(dev, true);
@@ -599,6 +604,15 @@ static const struct v4l2_ctrl_config vivid_ctrl_vflip = {
.step = 1,
};
+static const struct v4l2_ctrl_config vivid_ctrl_reduced_fps = {
+ .ops = &vivid_vid_cap_ctrl_ops,
+ .id = VIVID_CID_REDUCED_FPS,
+ .name = "Reduced fps",
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .max = 1,
+ .step = 1,
+};
+
static const struct v4l2_ctrl_config vivid_ctrl_has_crop_cap = {
.ops = &vivid_vid_cap_ctrl_ops,
.id = VIVID_CID_HAS_CROP_CAP,
@@ -1379,6 +1393,7 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
v4l2_ctrl_new_custom(hdl_vid_cap, &vivid_ctrl_vflip, NULL);
v4l2_ctrl_new_custom(hdl_vid_cap, &vivid_ctrl_insert_sav, NULL);
v4l2_ctrl_new_custom(hdl_vid_cap, &vivid_ctrl_insert_eav, NULL);
+ v4l2_ctrl_new_custom(hdl_vid_cap, &vivid_ctrl_reduced_fps, NULL);
if (show_ccs_cap) {
dev->ctrl_has_crop_cap = v4l2_ctrl_new_custom(hdl_vid_cap,
&vivid_ctrl_has_crop_cap, NULL);
diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c b/drivers/media/platform/vivid/vivid-vid-cap.c
index ed0b878..2b26059 100644
--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -401,6 +401,7 @@ void vivid_update_format_cap(struct vivid_dev *dev, bool keep_controls)
{
struct v4l2_bt_timings *bt = &dev->dv_timings_cap.bt;
unsigned size;
+ u64 pixelclock;
switch (dev->input_type[dev->input]) {
case WEBCAM:
@@ -430,8 +431,12 @@ void vivid_update_format_cap(struct vivid_dev *dev, bool keep_controls)
dev->src_rect.width = bt->width;
dev->src_rect.height = bt->height;
size = V4L2_DV_BT_FRAME_WIDTH(bt) * V4L2_DV_BT_FRAME_HEIGHT(bt);
+ if (dev->reduced_fps)
+ pixelclock = div_u64((bt->pixelclock * 1000), 1001);
+ else
+ pixelclock = bt->pixelclock;
dev->timeperframe_vid_cap = (struct v4l2_fract) {
- size / 100, (u32)bt->pixelclock / 100
+ size / 100, (u32)pixelclock / 100
};
if (bt->interlaced)
dev->field_cap = V4L2_FIELD_ALTERNATE;
--
1.9.1
--
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