If reduced fps flag is set then check if other necessary conditions
are true for the given bt timing. If yes, then reduce the frame rate.
For vivid transmitter, timeperframe_vid_out controls the frame rate.
Adjusting the timeperframe_vid_out by scaling down pixel clock by
factor of 1000 / 1001.
Cc: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Prashant Laddha <prlad...@cisco.com>
---
drivers/media/platform/vivid/vivid-vid-out.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/vivid/vivid-vid-out.c
b/drivers/media/platform/vivid/vivid-vid-out.c
index c404e27..e860347 100644
--- a/drivers/media/platform/vivid/vivid-vid-out.c
+++ b/drivers/media/platform/vivid/vivid-vid-out.c
@@ -220,6 +220,7 @@ void vivid_update_format_out(struct vivid_dev *dev)
{
struct v4l2_bt_timings *bt = &dev->dv_timings_out.bt;
unsigned size, p;
+ u64 pixelclock;
switch (dev->output_type[dev->output]) {
case SVID:
@@ -241,8 +242,14 @@ void vivid_update_format_out(struct vivid_dev *dev)
dev->sink_rect.width = bt->width;
dev->sink_rect.height = bt->height;
size = V4L2_DV_BT_FRAME_WIDTH(bt) * V4L2_DV_BT_FRAME_HEIGHT(bt);
+
+ if (can_reduce_fps(bt) && (bt->flags & V4L2_DV_FL_REDUCED_FPS))
+ pixelclock = div_u64(bt->pixelclock * 1000, 1001);
+ else
+ pixelclock = bt->pixelclock;
+
dev->timeperframe_vid_out = (struct v4l2_fract) {
- size / 100, (u32)bt->pixelclock / 100
+ size / 100, (u32)pixelclock / 100
};
if (bt->interlaced)
dev->field_out = V4L2_FIELD_ALTERNATE;
--
1.9.1
--
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