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path: root/drivers/media/platform/vivid/vivid-sdr-cap.c
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Diffstat (limited to 'drivers/media/platform/vivid/vivid-sdr-cap.c')
-rw-r--r--drivers/media/platform/vivid/vivid-sdr-cap.c83
1 files changed, 45 insertions, 38 deletions
diff --git a/drivers/media/platform/vivid/vivid-sdr-cap.c b/drivers/media/platform/vivid/vivid-sdr-cap.c
index d2f2188a0efe..082c401764ce 100644
--- a/drivers/media/platform/vivid/vivid-sdr-cap.c
+++ b/drivers/media/platform/vivid/vivid-sdr-cap.c
@@ -22,6 +22,7 @@
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
+#include <linux/math64.h>
#include <linux/videodev2.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-common.h>
@@ -40,7 +41,7 @@ struct vivid_format {
};
/* format descriptions for capture and preview */
-static struct vivid_format formats[] = {
+static const struct vivid_format formats[] = {
{
.pixelformat = V4L2_SDR_FMT_CU8,
.buffersize = SDR_CAP_SAMPLES_PER_BUF * 2,
@@ -114,11 +115,11 @@ static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev)
spin_unlock(&dev->slock);
if (sdr_cap_buf) {
- sdr_cap_buf->vb.v4l2_buf.sequence = dev->sdr_cap_seq_count;
+ sdr_cap_buf->vb.sequence = dev->sdr_cap_seq_count;
vivid_sdr_cap_process(dev, sdr_cap_buf);
- v4l2_get_timestamp(&sdr_cap_buf->vb.v4l2_buf.timestamp);
- sdr_cap_buf->vb.v4l2_buf.timestamp.tv_sec += dev->time_wrap_offset;
- vb2_buffer_done(&sdr_cap_buf->vb, dev->dqbuf_error ?
+ v4l2_get_timestamp(&sdr_cap_buf->vb.timestamp);
+ sdr_cap_buf->vb.timestamp.tv_sec += dev->time_wrap_offset;
+ vb2_buffer_done(&sdr_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
dev->dqbuf_error = false;
}
@@ -161,7 +162,8 @@ static int vivid_thread_sdr_cap(void *data)
/* Calculate the number of jiffies since we started streaming */
jiffies_since_start = cur_jiffies - dev->jiffies_sdr_cap;
/* Get the number of buffers streamed since the start */
- buffers_since_start = (u64)jiffies_since_start * dev->sdr_adc_freq +
+ buffers_since_start =
+ (u64)jiffies_since_start * dev->sdr_adc_freq +
(HZ * SDR_CAP_SAMPLES_PER_BUF) / 2;
do_div(buffers_since_start, HZ * SDR_CAP_SAMPLES_PER_BUF);
@@ -176,7 +178,8 @@ static int vivid_thread_sdr_cap(void *data)
dev->sdr_cap_seq_offset = buffers_since_start;
buffers_since_start = 0;
}
- dev->sdr_cap_seq_count = buffers_since_start + dev->sdr_cap_seq_offset;
+ dev->sdr_cap_seq_count =
+ buffers_since_start + dev->sdr_cap_seq_offset;
vivid_thread_sdr_cap_tick(dev);
mutex_unlock(&dev->mutex);
@@ -210,7 +213,7 @@ static int vivid_thread_sdr_cap(void *data)
return 0;
}
-static int sdr_cap_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+static int sdr_cap_queue_setup(struct vb2_queue *vq, const void *parg,
unsigned *nbuffers, unsigned *nplanes,
unsigned sizes[], void *alloc_ctxs[])
{
@@ -247,8 +250,9 @@ static int sdr_cap_buf_prepare(struct vb2_buffer *vb)
static void sdr_cap_buf_queue(struct vb2_buffer *vb)
{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
- struct vivid_buffer *buf = container_of(vb, struct vivid_buffer, vb);
+ struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
dprintk(dev, 1, "%s\n", __func__);
@@ -282,7 +286,8 @@ static int sdr_cap_start_streaming(struct vb2_queue *vq, unsigned count)
list_for_each_entry_safe(buf, tmp, &dev->sdr_cap_active, list) {
list_del(&buf->list);
- vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
+ vb2_buffer_done(&buf->vb.vb2_buf,
+ VB2_BUF_STATE_QUEUED);
}
}
return err;
@@ -299,9 +304,10 @@ static void sdr_cap_stop_streaming(struct vb2_queue *vq)
while (!list_empty(&dev->sdr_cap_active)) {
struct vivid_buffer *buf;
- buf = list_entry(dev->sdr_cap_active.next, struct vivid_buffer, list);
+ buf = list_entry(dev->sdr_cap_active.next,
+ struct vivid_buffer, list);
list_del(&buf->list);
- vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
/* shutdown control thread */
@@ -321,7 +327,8 @@ const struct vb2_ops vivid_sdr_cap_qops = {
.wait_finish = vb2_ops_wait_finish,
};
-int vivid_sdr_enum_freq_bands(struct file *file, void *fh, struct v4l2_frequency_band *band)
+int vivid_sdr_enum_freq_bands(struct file *file, void *fh,
+ struct v4l2_frequency_band *band)
{
switch (band->tuner) {
case 0:
@@ -339,7 +346,8 @@ int vivid_sdr_enum_freq_bands(struct file *file, void *fh, struct v4l2_frequency
}
}
-int vivid_sdr_g_frequency(struct file *file, void *fh, struct v4l2_frequency *vf)
+int vivid_sdr_g_frequency(struct file *file, void *fh,
+ struct v4l2_frequency *vf)
{
struct vivid_dev *dev = video_drvdata(file);
@@ -357,7 +365,8 @@ int vivid_sdr_g_frequency(struct file *file, void *fh, struct v4l2_frequency *vf
}
}
-int vivid_sdr_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf)
+int vivid_sdr_s_frequency(struct file *file, void *fh,
+ const struct v4l2_frequency *vf)
{
struct vivid_dev *dev = video_drvdata(file);
unsigned freq = vf->frequency;
@@ -403,14 +412,16 @@ int vivid_sdr_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
case 0:
strlcpy(vt->name, "ADC", sizeof(vt->name));
vt->type = V4L2_TUNER_ADC;
- vt->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
+ vt->capability =
+ V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
vt->rangelow = bands_adc[0].rangelow;
vt->rangehigh = bands_adc[2].rangehigh;
return 0;
case 1:
strlcpy(vt->name, "RF", sizeof(vt->name));
vt->type = V4L2_TUNER_RF;
- vt->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
+ vt->capability =
+ V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
vt->rangelow = bands_fm[0].rangelow;
vt->rangehigh = bands_fm[0].rangehigh;
return 0;
@@ -488,47 +499,42 @@ int vidioc_try_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_format *f)
#define FIXP_N (15)
#define FIXP_FRAC (1 << FIXP_N)
#define FIXP_2PI ((int)(2 * 3.141592653589 * FIXP_FRAC))
+#define M_100000PI (3.14159 * 100000)
void vivid_sdr_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
{
- u8 *vbuf = vb2_plane_vaddr(&buf->vb, 0);
+ u8 *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
unsigned long i;
- unsigned long plane_size = vb2_plane_size(&buf->vb, 0);
+ unsigned long plane_size = vb2_plane_size(&buf->vb.vb2_buf, 0);
+ s64 s64tmp;
s32 src_phase_step;
s32 mod_phase_step;
s32 fixp_i;
s32 fixp_q;
- /*
- * TODO: Generated beep tone goes very crackly when sample rate is
- * increased to ~1Msps or more. That is because of huge rounding error
- * of phase angle caused by used cosine implementation.
- */
-
/* calculate phase step */
#define BEEP_FREQ 1000 /* 1kHz beep */
src_phase_step = DIV_ROUND_CLOSEST(FIXP_2PI * BEEP_FREQ,
- dev->sdr_adc_freq);
+ dev->sdr_adc_freq);
for (i = 0; i < plane_size; i += 2) {
mod_phase_step = fixp_cos32_rad(dev->sdr_fixp_src_phase,
FIXP_2PI) >> (31 - FIXP_N);
dev->sdr_fixp_src_phase += src_phase_step;
- dev->sdr_fixp_mod_phase += mod_phase_step / 4;
+ s64tmp = (s64) mod_phase_step * dev->sdr_fm_deviation;
+ dev->sdr_fixp_mod_phase += div_s64(s64tmp, M_100000PI);
/*
- * Transfer phases to [0 / 2xPI] in order to avoid variable
+ * Transfer phase angle to [0, 2xPI] in order to avoid variable
* overflow and make it suitable for cosine implementation
* used, which does not support negative angles.
*/
- while (dev->sdr_fixp_mod_phase < FIXP_2PI)
- dev->sdr_fixp_mod_phase += FIXP_2PI;
- while (dev->sdr_fixp_mod_phase > FIXP_2PI)
- dev->sdr_fixp_mod_phase -= FIXP_2PI;
+ dev->sdr_fixp_src_phase %= FIXP_2PI;
+ dev->sdr_fixp_mod_phase %= FIXP_2PI;
- while (dev->sdr_fixp_src_phase > FIXP_2PI)
- dev->sdr_fixp_src_phase -= FIXP_2PI;
+ if (dev->sdr_fixp_mod_phase < 0)
+ dev->sdr_fixp_mod_phase += FIXP_2PI;
fixp_i = fixp_cos32_rad(dev->sdr_fixp_mod_phase, FIXP_2PI);
fixp_q = fixp_sin32_rad(dev->sdr_fixp_mod_phase, FIXP_2PI);
@@ -540,7 +546,7 @@ void vivid_sdr_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
switch (dev->sdr_pixelformat) {
case V4L2_SDR_FMT_CU8:
- /* convert 'fixp float' to u8 */
+ /* convert 'fixp float' to u8 [0, +255] */
/* u8 = X * 127.5 + 127.5; X is float [-1.0, +1.0] */
fixp_i = fixp_i * 1275 + FIXP_FRAC * 1275;
fixp_q = fixp_q * 1275 + FIXP_FRAC * 1275;
@@ -548,9 +554,10 @@ void vivid_sdr_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
*vbuf++ = DIV_ROUND_CLOSEST(fixp_q, FIXP_FRAC * 10);
break;
case V4L2_SDR_FMT_CS8:
- /* convert 'fixp float' to s8 */
- fixp_i = fixp_i * 1275;
- fixp_q = fixp_q * 1275;
+ /* convert 'fixp float' to s8 [-128, +127] */
+ /* s8 = X * 127.5 - 0.5; X is float [-1.0, +1.0] */
+ fixp_i = fixp_i * 1275 - FIXP_FRAC * 5;
+ fixp_q = fixp_q * 1275 - FIXP_FRAC * 5;
*vbuf++ = DIV_ROUND_CLOSEST(fixp_i, FIXP_FRAC * 10);
*vbuf++ = DIV_ROUND_CLOSEST(fixp_q, FIXP_FRAC * 10);
break;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.