From patchwork Wed Apr 24 16:03:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 13642154 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A23B715EFAC for ; Wed, 24 Apr 2024 16:03:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713974605; cv=none; b=IC2wXZqHQsFFhdMoJm3dlTQ8Ex1yIlepgWg1XnWSyPVsUCHhQRC03fDo6nFdbHr+2PyXDQhp+JFg7xrs+BfQN6/U3gDKmWhnM11YoqEFMLFRZVE2nHCmmLRQZTk5aCvuoNrpYNJIqxjykrdY6KH+RiKE/OLtjP1+s9n7+2PQ2RM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713974605; c=relaxed/simple; bh=RwQ7J0P0uGCe2JXsapX6Sgzcjhnqf6EyapoUkeQNSO4=; h=Message-ID:Date:MIME-Version:To:Cc:From:Subject:Content-Type; b=QRaPaNGFvs8MLW4Ltc42kwlk07K24Js6oSaG3R8aT9KJi7o8w1diAwXcnKJGETR8ERoLYj+SAK65RrbUWXBPK4VNwKiENN1ZYzURDs+jZNwfnqa0EvTGopFpGP1CdHgEpESxJx/r1GLcQgx7FVGer759rwfkn6vGafeHbOvzbYk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7CB2BC113CD; Wed, 24 Apr 2024 16:03:23 +0000 (UTC) Message-ID: <11f1f7fc-13ba-4be0-924c-ded60a5ca18f@xs4all.nl> Date: Wed, 24 Apr 2024 18:03:21 +0200 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US, nl To: Linux Media Mailing List Cc: Ricardo Ribalda From: Hans Verkuil Subject: [PATCH] media: vivid: make the timestamps/seq numbers reliable Autocrypt: addr=hverkuil@xs4all.nl; keydata= xsFNBFQ84W0BEAC7EF1iL4s3tY8cRTVkJT/297h0Hz0ypA+ByVM4CdU9sN6ua/YoFlr9k0K4 BFUlg7JzJoUuRbKxkYb8mmqOe722j7N3HO8+ofnio5cAP5W0WwDpM0kM84BeHU0aPSTsWiGR yw55SOK2JBSq7hueotWLfJLobMWhQii0Zd83hGT9SIt9uHaHjgwmtTH7MSTIiaY6N14nw2Ud C6Uykc1va0Wqqc2ov5ihgk/2k2SKa02ookQI3e79laOrbZl5BOXNKR9LguuOZdX4XYR3Zi6/ BsJ7pVCK9xkiVf8svlEl94IHb+sa1KrlgGv3fn5xgzDw8Z222TfFceDL/2EzUyTdWc4GaPMC E/c1B4UOle6ZHg02+I8tZicjzj5+yffv1lB5A1btG+AmoZrgf0X2O1B96fqgHx8w9PIpVERN YsmkfxvhfP3MO3oHh8UY1OLKdlKamMneCLk2up1Zlli347KMjHAVjBAiy8qOguKF9k7HOjif JCLYTkggrRiEiE1xg4tblBNj8WGyKH+u/hwwwBqCd/Px2HvhAsJQ7DwuuB3vBAp845BJYUU3 06kRihFqbO0vEt4QmcQDcbWINeZ2zX5TK7QQ91ldHdqJn6MhXulPKcM8tCkdD8YNXXKyKqNl UVqXnarz8m2JCbHgjEkUlAJCNd6m3pfESLZwSWsLYL49R5yxIwARAQABzSFIYW5zIFZlcmt1 aWwgPGh2ZXJrdWlsQHhzNGFsbC5ubD7CwZUEEwECACgFAlQ84W0CGwMFCRLMAwAGCwkIBwMC BhUIAgkKCwQWAgMBAh4BAheAACEJEL0tYUhmFDtMFiEEBSzee8IVBTtonxvKvS1hSGYUO0wT 7w//frEmPBAwu3OdvAk9VDkH7X+7RcFpiuUcJxs3Xl6jpaA+SdwtZra6W1uMrs2RW8eXXiq/ 80HXJtYnal1Y8MKUBoUVhT/+5+KcMyfVQK3VFRHnNxCmC9HZV+qdyxAGwIscUd4hSlweuU6L 6tI7Dls6NzKRSTFbbGNZCRgl8OrF01TBH+CZrcFIoDgpcJA5Pw84mxo+wd2BZjPA4TNyq1od +slSRbDqFug1EqQaMVtUOdgaUgdlmjV0+GfBHoyCGedDE0knv+tRb8v5gNgv7M3hJO3Nrl+O OJVoiW0G6OWVyq92NNCKJeDy8XCB1yHCKpBd4evO2bkJNV9xcgHtLrVqozqxZAiCRKN1elWF 1fyG8KNquqItYedUr+wZZacqW+uzpVr9pZmUqpVCk9s92fzTzDZcGAxnyqkaO2QTgdhPJT2m wpG2UwIKzzi13tmwakY7OAbXm76bGWVZCO3QTHVnNV8ku9wgeMc/ZGSLUT8hMDZlwEsW7u/D qt+NlTKiOIQsSW7u7h3SFm7sMQo03X/taK9PJhS2BhhgnXg8mOa6U+yNaJy+eU0Lf5hEUiDC vDOI5x++LD3pdrJVr/6ZB0Qg3/YzZ0dk+phQ+KlP6HyeO4LG662toMbFbeLcBjcC/ceEclII 90QNEFSZKM6NVloM+NaZRYVO3ApxWkFu+1mrVTXOwU0EVDzhbQEQANzLiI6gHkIhBQKeQaYs p2SSqF9c++9LOy5x6nbQ4s0X3oTKaMGfBZuiKkkU6NnHCSa0Az5ScRWLaRGu1PzjgcVwzl5O sDawR1BtOG/XoPRNB2351PRp++W8TWo2viYYY0uJHKFHML+ku9q0P+NkdTzFGJLP+hn7x0RT DMbhKTHO3H2xJz5TXNE9zTJuIfGAz3ShDpijvzYieY330BzZYfpgvCllDVM5E4XgfF4F/N90 wWKu50fMA01ufwu+99GEwTFVG2az5T9SXd7vfSgRSkzXy7hcnxj4IhOfM6Ts85/BjMeIpeqy TDdsuetBgX9DMMWxMWl7BLeiMzMGrfkJ4tvlof0sVjurXibTibZyfyGR2ricg8iTbHyFaAzX 2uFVoZaPxrp7udDfQ96sfz0hesF9Zi8d7NnNnMYbUmUtaS083L/l2EDKvCIkhSjd48XF+aO8 VhrCfbXWpGRaLcY/gxi2TXRYG9xCa7PINgz9SyO34sL6TeFPSZn4bPQV5O1j85Dj4jBecB1k z2arzwlWWKMZUbR04HTeAuuvYvCKEMnfW3ABzdonh70QdqJbpQGfAF2p4/iCETKWuqefiOYn pR8PqoQA1DYv3t7y9DIN5Jw/8Oj5wOeEybw6vTMB0rrnx+JaXvxeHSlFzHiD6il/ChDDkJ9J /ejCHUQIl40wLSDRABEBAAHCwXwEGAECAA8FAlQ84W0CGwwFCRLMAwAAIQkQvS1hSGYUO0wW IQQFLN57whUFO2ifG8q9LWFIZhQ7TA1WD/9yxJvQrpf6LcNrr8uMlQWCg2iz2q1LGt1Itkuu KaavEF9nqHmoqhSfZeAIKAPn6xuYbGxXDrpN7dXCOH92fscLodZqZtK5FtbLvO572EPfxneY UT7JzDc/5LT9cFFugTMOhq1BG62vUm/F6V91+unyp4dRlyryAeqEuISykhvjZCVHk/woaMZv c1Dm4Uvkv0Ilelt3Pb9J7zhcx6sm5T7v16VceF96jG61bnJ2GFS+QZerZp3PY27XgtPxRxYj AmFUeF486PHx/2Yi4u1rQpIpC5inPxIgR1+ZFvQrAV36SvLFfuMhyCAxV6WBlQc85ArOiQZB Wm7L0repwr7zEJFEkdy8C81WRhMdPvHkAIh3RoY1SGcdB7rB3wCzfYkAuCBqaF7Zgfw8xkad KEiQTexRbM1sc/I8ACpla3N26SfQwrfg6V7TIoweP0RwDrcf5PVvwSWsRQp2LxFCkwnCXOra gYmkrmv0duG1FStpY+IIQn1TOkuXrciTVfZY1cZD0aVxwlxXBnUNZZNslldvXFtndxR0SFat sflovhDxKyhFwXOP0Rv8H378/+14TaykknRBIKEc0+lcr+EMOSUR5eg4aURb8Gc3Uc7fgQ6q UssTXzHPyj1hAyDpfu8DzAwlh4kKFTodxSsKAjI45SLjadSc94/5Gy8645Y1KgBzBPTH7Q== The sequence counters could skip due to bad time calculations. In addition, the timestamps were very jittery as well. This caused random warnings in v4l2-compliance when streaming because the sequence numbers were not what was expected. Adjust the code to be more precise. This affected video capture, output, v4l-touch and sdr capture since all had the same bad calculations. There is one problem remaining: if CONFIG_HZ is set to 100, then with framerates > 100 you will get dropped frames. This code really should switch to timers to handle this more accurately. Signed-off-by: Hans Verkuil --- drivers/media/test-drivers/vivid/vivid-core.h | 8 --- .../test-drivers/vivid/vivid-kthread-cap.c | 54 +++++++-------- .../test-drivers/vivid/vivid-kthread-out.c | 65 ++++++++----------- .../test-drivers/vivid/vivid-kthread-touch.c | 59 ++++++++--------- .../media/test-drivers/vivid/vivid-sdr-cap.c | 21 +++--- 5 files changed, 87 insertions(+), 120 deletions(-) diff --git a/drivers/media/test-drivers/vivid/vivid-core.h b/drivers/media/test-drivers/vivid/vivid-core.h index cfb8e66083f6..0f854aaddbf0 100644 --- a/drivers/media/test-drivers/vivid/vivid-core.h +++ b/drivers/media/test-drivers/vivid/vivid-core.h @@ -399,10 +399,8 @@ struct vivid_dev { /* thread for generating video capture stream */ struct task_struct *kthread_vid_cap; unsigned long jiffies_vid_cap; - u64 cap_stream_start; u64 cap_frame_period; u64 cap_frame_eof_offset; - u32 cap_seq_offset; u32 cap_seq_count; bool cap_seq_resync; u32 vid_cap_seq_start; @@ -418,9 +416,6 @@ struct vivid_dev { /* Touch capture */ struct task_struct *kthread_touch_cap; unsigned long jiffies_touch_cap; - u64 touch_cap_stream_start; - u32 touch_cap_seq_offset; - bool touch_cap_seq_resync; u32 touch_cap_seq_start; u32 touch_cap_seq_count; u32 touch_cap_with_seq_wrap_count; @@ -474,9 +469,7 @@ struct vivid_dev { /* thread for generating video output stream */ struct task_struct *kthread_vid_out; unsigned long jiffies_vid_out; - u32 out_seq_offset; u32 out_seq_count; - bool out_seq_resync; u32 vid_out_seq_start; u32 vid_out_seq_count; bool vid_out_streaming; @@ -510,7 +503,6 @@ struct vivid_dev { /* thread for generating SDR stream */ struct task_struct *kthread_sdr_cap; unsigned long jiffies_sdr_cap; - u32 sdr_cap_seq_offset; u32 sdr_cap_seq_start; u32 sdr_cap_seq_count; u32 sdr_cap_with_seq_wrap_count; diff --git a/drivers/media/test-drivers/vivid/vivid-kthread-cap.c b/drivers/media/test-drivers/vivid/vivid-kthread-cap.c index 42048727d7ff..d8bb5b1fc1ed 100644 --- a/drivers/media/test-drivers/vivid/vivid-kthread-cap.c +++ b/drivers/media/test-drivers/vivid/vivid-kthread-cap.c @@ -553,12 +553,11 @@ static void vivid_cap_update_frame_period(struct vivid_dev *dev) } static noinline_for_stack void vivid_thread_vid_cap_tick(struct vivid_dev *dev, - int dropped_bufs) + int dropped_bufs, u64 f_time) { struct vivid_buffer *vid_cap_buf = NULL; struct vivid_buffer *vbi_cap_buf = NULL; struct vivid_buffer *meta_cap_buf = NULL; - u64 f_time = 0; dprintk(dev, 1, "Video Capture Thread Tick\n"); @@ -596,8 +595,6 @@ static noinline_for_stack void vivid_thread_vid_cap_tick(struct vivid_dev *dev, if (!vid_cap_buf && !vbi_cap_buf && !meta_cap_buf) goto update_mv; - f_time = ktime_get_ns() + dev->time_wrap_offset; - if (vid_cap_buf) { v4l2_ctrl_request_setup(vid_cap_buf->vb.vb2_buf.req_obj.req, &dev->ctrl_hdl_vid_cap); @@ -664,12 +661,14 @@ static noinline_for_stack void vivid_thread_vid_cap_tick(struct vivid_dev *dev, static int vivid_thread_vid_cap(void *data) { struct vivid_dev *dev = data; + u64 start_time; u64 numerators_since_start; u64 buffers_since_start; - u64 next_jiffies_since_start; + u64 f_time; + u32 seq_offset = 0; + unsigned long next_jiffies; unsigned long jiffies_since_start; unsigned long cur_jiffies; - unsigned wait_jiffies; unsigned numerator; unsigned denominator; int dropped_bufs; @@ -679,13 +678,12 @@ static int vivid_thread_vid_cap(void *data) set_freezable(); /* Resets frame counters */ - dev->cap_seq_offset = 0; dev->cap_seq_count = 0; dev->cap_seq_resync = false; dev->jiffies_vid_cap = jiffies; - dev->cap_stream_start = ktime_get_ns(); + start_time = ktime_get_ns(); if (dev->time_wrap) - dev->time_wrap_offset = dev->time_wrap - dev->cap_stream_start; + dev->time_wrap_offset = dev->time_wrap - start_time; else dev->time_wrap_offset = 0; vivid_cap_update_frame_period(dev); @@ -703,10 +701,9 @@ static int vivid_thread_vid_cap(void *data) cur_jiffies = jiffies; if (dev->cap_seq_resync) { dev->jiffies_vid_cap = cur_jiffies; - dev->cap_seq_offset = dev->cap_seq_count + 1; + seq_offset = dev->cap_seq_count + 1; dev->cap_seq_count = 0; - dev->cap_stream_start += dev->cap_frame_period * - dev->cap_seq_offset; + start_time += dev->cap_frame_period * seq_offset; vivid_cap_update_frame_period(dev); dev->cap_seq_resync = false; } @@ -719,9 +716,10 @@ static int vivid_thread_vid_cap(void *data) /* Calculate the number of jiffies since we started streaming */ jiffies_since_start = cur_jiffies - dev->jiffies_vid_cap; /* Get the number of buffers streamed since the start */ - buffers_since_start = (u64)jiffies_since_start * denominator + - (HZ * numerator) / 2; + buffers_since_start = (u64)jiffies_since_start * denominator; do_div(buffers_since_start, HZ * numerator); + f_time = start_time + dev->time_wrap_offset + + buffers_since_start * dev->cap_frame_period; /* * After more than 0xf0000000 (rounded down to a multiple of @@ -731,16 +729,17 @@ static int vivid_thread_vid_cap(void *data) */ if (jiffies_since_start > JIFFIES_RESYNC) { dev->jiffies_vid_cap = cur_jiffies; - dev->cap_seq_offset = buffers_since_start; + seq_offset = buffers_since_start; buffers_since_start = 0; } - dropped_bufs = buffers_since_start + dev->cap_seq_offset - dev->cap_seq_count; - dev->cap_seq_count = buffers_since_start + dev->cap_seq_offset; + dropped_bufs = buffers_since_start + seq_offset - dev->cap_seq_count; + dev->cap_seq_count = buffers_since_start + seq_offset; dev->vid_cap_seq_count = dev->cap_seq_count - dev->vid_cap_seq_start; dev->vbi_cap_seq_count = dev->cap_seq_count - dev->vbi_cap_seq_start; dev->meta_cap_seq_count = dev->cap_seq_count - dev->meta_cap_seq_start; - vivid_thread_vid_cap_tick(dev, dropped_bufs); + vivid_thread_vid_cap_tick(dev, dropped_bufs, f_time); + mutex_unlock(&dev->mutex); /* * Calculate the number of 'numerators' streamed since we started, @@ -748,24 +747,15 @@ static int vivid_thread_vid_cap(void *data) */ numerators_since_start = ++buffers_since_start * numerator; - /* And the number of jiffies since we started */ - jiffies_since_start = jiffies - dev->jiffies_vid_cap; - - mutex_unlock(&dev->mutex); - /* * Calculate when that next buffer is supposed to start * in jiffies since we started streaming. */ - next_jiffies_since_start = numerators_since_start * HZ + - denominator / 2; - do_div(next_jiffies_since_start, denominator); - /* If it is in the past, then just schedule asap */ - if (next_jiffies_since_start < jiffies_since_start) - next_jiffies_since_start = jiffies_since_start; - - wait_jiffies = next_jiffies_since_start - jiffies_since_start; - while (time_is_after_jiffies(cur_jiffies + wait_jiffies) && + next_jiffies = numerators_since_start * HZ + denominator - 1; + do_div(next_jiffies, denominator); + next_jiffies += dev->jiffies_vid_cap; + + while (time_is_after_jiffies(next_jiffies) && !kthread_should_stop()) schedule(); } diff --git a/drivers/media/test-drivers/vivid/vivid-kthread-out.c b/drivers/media/test-drivers/vivid/vivid-kthread-out.c index fac6208b51da..536688c7f503 100644 --- a/drivers/media/test-drivers/vivid/vivid-kthread-out.c +++ b/drivers/media/test-drivers/vivid/vivid-kthread-out.c @@ -41,7 +41,7 @@ #include "vivid-kthread-out.h" #include "vivid-meta-out.h" -static void vivid_thread_vid_out_tick(struct vivid_dev *dev) +static void vivid_thread_vid_out_tick(struct vivid_dev *dev, u64 f_time) { struct vivid_buffer *vid_out_buf = NULL; struct vivid_buffer *vbi_out_buf = NULL; @@ -95,8 +95,7 @@ static void vivid_thread_vid_out_tick(struct vivid_dev *dev) */ vid_out_buf->vb.sequence /= 2; } - vid_out_buf->vb.vb2_buf.timestamp = - ktime_get_ns() + dev->time_wrap_offset; + vid_out_buf->vb.vb2_buf.timestamp = f_time; vb2_buffer_done(&vid_out_buf->vb.vb2_buf, dev->dqbuf_error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); dprintk(dev, 2, "vid_out buffer %d done\n", @@ -112,8 +111,7 @@ static void vivid_thread_vid_out_tick(struct vivid_dev *dev) vivid_sliced_vbi_out_process(dev, vbi_out_buf); vbi_out_buf->vb.sequence = dev->vbi_out_seq_count; - vbi_out_buf->vb.vb2_buf.timestamp = - ktime_get_ns() + dev->time_wrap_offset; + vbi_out_buf->vb.vb2_buf.timestamp = f_time; vb2_buffer_done(&vbi_out_buf->vb.vb2_buf, dev->dqbuf_error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); dprintk(dev, 2, "vbi_out buffer %d done\n", @@ -126,8 +124,7 @@ static void vivid_thread_vid_out_tick(struct vivid_dev *dev) &dev->ctrl_hdl_meta_out); vivid_meta_out_process(dev, meta_out_buf); meta_out_buf->vb.sequence = dev->meta_out_seq_count; - meta_out_buf->vb.vb2_buf.timestamp = - ktime_get_ns() + dev->time_wrap_offset; + meta_out_buf->vb.vb2_buf.timestamp = f_time; vb2_buffer_done(&meta_out_buf->vb.vb2_buf, dev->dqbuf_error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); dprintk(dev, 2, "meta_out buffer %d done\n", @@ -140,12 +137,14 @@ static void vivid_thread_vid_out_tick(struct vivid_dev *dev) static int vivid_thread_vid_out(void *data) { struct vivid_dev *dev = data; + u64 start_time; u64 numerators_since_start; u64 buffers_since_start; - u64 next_jiffies_since_start; + u64 f_time, f_period; + u32 seq_offset = 0; + unsigned long next_jiffies; unsigned long jiffies_since_start; unsigned long cur_jiffies; - unsigned wait_jiffies; unsigned numerator; unsigned denominator; @@ -154,15 +153,19 @@ static int vivid_thread_vid_out(void *data) set_freezable(); /* Resets frame counters */ - dev->out_seq_offset = 0; dev->out_seq_count = 0; dev->jiffies_vid_out = jiffies; - dev->out_seq_resync = false; + start_time = ktime_get_ns(); if (dev->time_wrap) - dev->time_wrap_offset = dev->time_wrap - ktime_get_ns(); + dev->time_wrap_offset = dev->time_wrap - start_time; else dev->time_wrap_offset = 0; + f_period = (u64)dev->timeperframe_vid_out.numerator * 1000000000; + if (WARN_ON(dev->timeperframe_vid_out.denominator == 0)) + dev->timeperframe_vid_out.denominator = 1; + do_div(f_period, dev->timeperframe_vid_out.denominator); + for (;;) { try_to_freeze(); if (kthread_should_stop()) @@ -174,12 +177,6 @@ static int vivid_thread_vid_out(void *data) } cur_jiffies = jiffies; - if (dev->out_seq_resync) { - dev->jiffies_vid_out = cur_jiffies; - dev->out_seq_offset = dev->out_seq_count + 1; - dev->out_seq_count = 0; - dev->out_seq_resync = false; - } numerator = dev->timeperframe_vid_out.numerator; denominator = dev->timeperframe_vid_out.denominator; @@ -189,9 +186,10 @@ static int vivid_thread_vid_out(void *data) /* Calculate the number of jiffies since we started streaming */ jiffies_since_start = cur_jiffies - dev->jiffies_vid_out; /* Get the number of buffers streamed since the start */ - buffers_since_start = (u64)jiffies_since_start * denominator + - (HZ * numerator) / 2; + buffers_since_start = (u64)jiffies_since_start * denominator; do_div(buffers_since_start, HZ * numerator); + f_time = start_time + dev->time_wrap_offset + + buffers_since_start * f_period; /* * After more than 0xf0000000 (rounded down to a multiple of @@ -201,41 +199,32 @@ static int vivid_thread_vid_out(void *data) */ if (jiffies_since_start > JIFFIES_RESYNC) { dev->jiffies_vid_out = cur_jiffies; - dev->out_seq_offset = buffers_since_start; + seq_offset = buffers_since_start; buffers_since_start = 0; } - dev->out_seq_count = buffers_since_start + dev->out_seq_offset; + dev->out_seq_count = buffers_since_start + seq_offset; dev->vid_out_seq_count = dev->out_seq_count - dev->vid_out_seq_start; dev->vbi_out_seq_count = dev->out_seq_count - dev->vbi_out_seq_start; dev->meta_out_seq_count = dev->out_seq_count - dev->meta_out_seq_start; - vivid_thread_vid_out_tick(dev); + vivid_thread_vid_out_tick(dev, f_time); mutex_unlock(&dev->mutex); /* * Calculate the number of 'numerators' streamed since we started, * not including the current buffer. */ - numerators_since_start = buffers_since_start * numerator; + numerators_since_start = ++buffers_since_start * numerator; - /* And the number of jiffies since we started */ - jiffies_since_start = jiffies - dev->jiffies_vid_out; - - /* Increase by the 'numerator' of one buffer */ - numerators_since_start += numerator; /* * Calculate when that next buffer is supposed to start * in jiffies since we started streaming. */ - next_jiffies_since_start = numerators_since_start * HZ + - denominator / 2; - do_div(next_jiffies_since_start, denominator); - /* If it is in the past, then just schedule asap */ - if (next_jiffies_since_start < jiffies_since_start) - next_jiffies_since_start = jiffies_since_start; - - wait_jiffies = next_jiffies_since_start - jiffies_since_start; - while (time_is_after_jiffies(cur_jiffies + wait_jiffies) && + next_jiffies = numerators_since_start * HZ + denominator - 1; + do_div(next_jiffies, denominator); + next_jiffies += dev->jiffies_vid_out; + + while (time_is_after_jiffies(next_jiffies) && !kthread_should_stop()) schedule(); } diff --git a/drivers/media/test-drivers/vivid/vivid-kthread-touch.c b/drivers/media/test-drivers/vivid/vivid-kthread-touch.c index fa711ee36a3f..cd0c3938b6a1 100644 --- a/drivers/media/test-drivers/vivid/vivid-kthread-touch.c +++ b/drivers/media/test-drivers/vivid/vivid-kthread-touch.c @@ -11,7 +11,7 @@ #include "vivid-touch-cap.h" static noinline_for_stack void vivid_thread_tch_cap_tick(struct vivid_dev *dev, - int dropped_bufs) + int dropped_bufs, u64 f_time) { struct vivid_buffer *tch_cap_buf = NULL; @@ -36,7 +36,7 @@ static noinline_for_stack void vivid_thread_tch_cap_tick(struct vivid_dev *dev, dprintk(dev, 2, "touch_cap buffer %d done\n", tch_cap_buf->vb.vb2_buf.index); - tch_cap_buf->vb.vb2_buf.timestamp = ktime_get_ns() + dev->time_wrap_offset; + tch_cap_buf->vb.vb2_buf.timestamp = f_time; } dev->dqbuf_error = false; } @@ -44,12 +44,14 @@ static noinline_for_stack void vivid_thread_tch_cap_tick(struct vivid_dev *dev, static int vivid_thread_touch_cap(void *data) { struct vivid_dev *dev = data; + u64 start_time; u64 numerators_since_start; u64 buffers_since_start; - u64 next_jiffies_since_start; + u64 f_time, f_period; + u32 seq_offset = 0; + unsigned long next_jiffies; unsigned long jiffies_since_start; unsigned long cur_jiffies; - unsigned int wait_jiffies; unsigned int numerator; unsigned int denominator; int dropped_bufs; @@ -59,15 +61,19 @@ static int vivid_thread_touch_cap(void *data) set_freezable(); /* Resets frame counters */ - dev->touch_cap_seq_offset = 0; dev->touch_cap_seq_count = 0; - dev->touch_cap_seq_resync = false; dev->jiffies_touch_cap = jiffies; + start_time = ktime_get_ns(); if (dev->time_wrap) - dev->time_wrap_offset = dev->time_wrap - ktime_get_ns(); + dev->time_wrap_offset = dev->time_wrap - start_time; else dev->time_wrap_offset = 0; + f_period = (u64)dev->timeperframe_tch_cap.numerator * 1000000000; + if (WARN_ON(dev->timeperframe_tch_cap.denominator == 0)) + dev->timeperframe_tch_cap.denominator = 1; + do_div(f_period, dev->timeperframe_tch_cap.denominator); + for (;;) { try_to_freeze(); if (kthread_should_stop()) @@ -78,21 +84,16 @@ static int vivid_thread_touch_cap(void *data) continue; } cur_jiffies = jiffies; - if (dev->touch_cap_seq_resync) { - dev->jiffies_touch_cap = cur_jiffies; - dev->touch_cap_seq_offset = dev->touch_cap_seq_count + 1; - dev->touch_cap_seq_count = 0; - dev->cap_seq_resync = false; - } denominator = dev->timeperframe_tch_cap.denominator; numerator = dev->timeperframe_tch_cap.numerator; /* Calculate the number of jiffies since we started streaming */ jiffies_since_start = cur_jiffies - dev->jiffies_touch_cap; /* Get the number of buffers streamed since the start */ - buffers_since_start = (u64)jiffies_since_start * denominator + - (HZ * numerator) / 2; + buffers_since_start = (u64)jiffies_since_start * denominator; do_div(buffers_since_start, HZ * numerator); + f_time = start_time + dev->time_wrap_offset + + buffers_since_start * f_period; /* * After more than 0xf0000000 (rounded down to a multiple of @@ -102,15 +103,16 @@ static int vivid_thread_touch_cap(void *data) */ if (jiffies_since_start > JIFFIES_RESYNC) { dev->jiffies_touch_cap = cur_jiffies; - dev->cap_seq_offset = buffers_since_start; + seq_offset = buffers_since_start; buffers_since_start = 0; } - dropped_bufs = buffers_since_start + dev->touch_cap_seq_offset - dev->touch_cap_seq_count; - dev->touch_cap_seq_count = buffers_since_start + dev->touch_cap_seq_offset; + dropped_bufs = buffers_since_start + seq_offset - dev->touch_cap_seq_count; + dev->touch_cap_seq_count = buffers_since_start + seq_offset; dev->touch_cap_with_seq_wrap_count = dev->touch_cap_seq_count - dev->touch_cap_seq_start; - vivid_thread_tch_cap_tick(dev, dropped_bufs); + vivid_thread_tch_cap_tick(dev, dropped_bufs, f_time); + mutex_unlock(&dev->mutex); /* * Calculate the number of 'numerators' streamed @@ -118,24 +120,15 @@ static int vivid_thread_touch_cap(void *data) */ numerators_since_start = ++buffers_since_start * numerator; - /* And the number of jiffies since we started */ - jiffies_since_start = jiffies - dev->jiffies_touch_cap; - - mutex_unlock(&dev->mutex); - /* * Calculate when that next buffer is supposed to start * in jiffies since we started streaming. */ - next_jiffies_since_start = numerators_since_start * HZ + - denominator / 2; - do_div(next_jiffies_since_start, denominator); - /* If it is in the past, then just schedule asap */ - if (next_jiffies_since_start < jiffies_since_start) - next_jiffies_since_start = jiffies_since_start; - - wait_jiffies = next_jiffies_since_start - jiffies_since_start; - while (time_is_after_jiffies(cur_jiffies + wait_jiffies) && + next_jiffies = numerators_since_start * HZ + denominator - 1; + do_div(next_jiffies, denominator); + next_jiffies += dev->jiffies_touch_cap; + + while (time_is_after_jiffies(next_jiffies) && !kthread_should_stop()) schedule(); } diff --git a/drivers/media/test-drivers/vivid/vivid-sdr-cap.c b/drivers/media/test-drivers/vivid/vivid-sdr-cap.c index a81f26b76988..e0d4deb4b1a5 100644 --- a/drivers/media/test-drivers/vivid/vivid-sdr-cap.c +++ b/drivers/media/test-drivers/vivid/vivid-sdr-cap.c @@ -82,7 +82,7 @@ static const struct v4l2_frequency_band bands_fm[] = { }, }; -static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev) +static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev, u64 f_time) { struct vivid_buffer *sdr_cap_buf = NULL; @@ -108,8 +108,7 @@ static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev) v4l2_ctrl_request_complete(sdr_cap_buf->vb.vb2_buf.req_obj.req, &dev->ctrl_hdl_sdr_cap); vivid_sdr_cap_process(dev, sdr_cap_buf); - sdr_cap_buf->vb.vb2_buf.timestamp = - ktime_get_ns() + dev->time_wrap_offset; + sdr_cap_buf->vb.vb2_buf.timestamp = f_time; vb2_buffer_done(&sdr_cap_buf->vb.vb2_buf, dev->dqbuf_error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); dev->dqbuf_error = false; @@ -119,9 +118,12 @@ static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev) static int vivid_thread_sdr_cap(void *data) { struct vivid_dev *dev = data; + u64 start_time; + u64 f_time; u64 samples_since_start; u64 buffers_since_start; u64 next_jiffies_since_start; + u32 seq_offset = 0; unsigned long jiffies_since_start; unsigned long cur_jiffies; unsigned wait_jiffies; @@ -131,12 +133,12 @@ static int vivid_thread_sdr_cap(void *data) set_freezable(); /* Resets frame counters */ - dev->sdr_cap_seq_offset = 0; dev->sdr_cap_seq_count = 0; dev->jiffies_sdr_cap = jiffies; dev->sdr_cap_seq_resync = false; + start_time = ktime_get_ns(); if (dev->time_wrap) - dev->time_wrap_offset = dev->time_wrap - ktime_get_ns(); + dev->time_wrap_offset = dev->time_wrap - start_time; else dev->time_wrap_offset = 0; @@ -153,7 +155,7 @@ static int vivid_thread_sdr_cap(void *data) cur_jiffies = jiffies; if (dev->sdr_cap_seq_resync) { dev->jiffies_sdr_cap = cur_jiffies; - dev->sdr_cap_seq_offset = dev->sdr_cap_seq_count + 1; + seq_offset = dev->sdr_cap_seq_count + 1; dev->sdr_cap_seq_count = 0; dev->sdr_cap_seq_resync = false; } @@ -173,14 +175,15 @@ static int vivid_thread_sdr_cap(void *data) */ if (jiffies_since_start > JIFFIES_RESYNC) { dev->jiffies_sdr_cap = cur_jiffies; - dev->sdr_cap_seq_offset = buffers_since_start; + seq_offset = buffers_since_start; buffers_since_start = 0; } dev->sdr_cap_seq_count = - buffers_since_start + dev->sdr_cap_seq_offset; + buffers_since_start + seq_offset; dev->sdr_cap_with_seq_wrap_count = dev->sdr_cap_seq_count - dev->sdr_cap_seq_start; + f_time = start_time + dev->time_wrap_offset; - vivid_thread_sdr_cap_tick(dev); + vivid_thread_sdr_cap_tick(dev, f_time); mutex_unlock(&dev->mutex); /*