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authorPrashant Laddha <prladdha@cisco.com>2015-09-22 11:27:29 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-11-17 15:05:40 -0200
commitb883ba75e95790ab866d465381bb058776653ef5 (patch)
treeae9b87ad5e774a3e16fd4ab0f64fc8be64843afd /drivers/media/platform
parent8d7322f4f753644bd00d3a7a267c43f506a0b9c1 (diff)
[media] vivid: add support for reduced fps in video out
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. Signed-off-by: Prashant Laddha <prladdha@cisco.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/platform')
-rw-r--r--drivers/media/platform/vivid/vivid-vid-out.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/media/platform/vivid/vivid-vid-out.c b/drivers/media/platform/vivid/vivid-vid-out.c
index b77acb6a7013..db645abd4967 100644
--- a/drivers/media/platform/vivid/vivid-vid-out.c
+++ b/drivers/media/platform/vivid/vivid-vid-out.c
@@ -224,6 +224,7 @@ 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:
@@ -245,8 +246,14 @@ 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;

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