From b883ba75e95790ab866d465381bb058776653ef5 Mon Sep 17 00:00:00 2001 From: Prashant Laddha Date: Tue, 22 Sep 2015 11:27:29 -0300 Subject: [PATCH] [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 Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- 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 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; -- GitLab