On 14.02.2014 17:02, Hans Verkuil wrote:
On 02/11/2014 03:04 AM, Antti Palosaari wrote:
E4000 tuner driver provides now some controls. Expose those to
userland.
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
index 9265424..18f8c56 100644
--- a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
+++ b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
@@ -25,6 +25,7 @@
#include "dvb_frontend.h"
#include "rtl2832_sdr.h"
#include "dvb_usb.h"
+#include "e4000.h"
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
@@ -1347,6 +1348,7 @@ struct dvb_frontend *rtl2832_sdr_attach(struct
dvb_frontend *fe,
struct rtl2832_sdr_state *s;
const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
struct dvb_usb_device *d = i2c_get_adapdata(i2c);
+ struct v4l2_ctrl_handler *hdl;
s = kzalloc(sizeof(struct rtl2832_sdr_state), GFP_KERNEL);
if (s == NULL) {
@@ -1386,10 +1388,10 @@ struct dvb_frontend *rtl2832_sdr_attach(struct
dvb_frontend *fe,
/* Register controls */
switch (s->cfg->tuner) {
case RTL2832_TUNER_E4000:
- v4l2_ctrl_handler_init(&s->hdl, 2);
- s->bandwidth_auto = v4l2_ctrl_new_std(&s->hdl, ops,
V4L2_CID_BANDWIDTH_AUTO, 0, 1, 1, 1);
- s->bandwidth = v4l2_ctrl_new_std(&s->hdl, ops,
V4L2_CID_BANDWIDTH, 4300000, 11000000, 100000, 4300000);
- v4l2_ctrl_auto_cluster(2, &s->bandwidth_auto, 0, false);
+ hdl = e4000_get_ctrl_handler(fe);
+ v4l2_ctrl_handler_init(&s->hdl, 0);
Use the same number as is used in e4000: 8.
It's a hint of the number of controls that the handler will contain and it
affects
the number of buckets used for the hash table. Putting in a 0 will result in a
single
bucket which means that all controls end up in a single linked list. Changing
it to
8 will result in two buckets, which performs a bit better.
OK. I was thinking that if I add handler to handler, I don't need to
take into account how many controls the tuner handler has. Before you
ask why there is 2 handlers merged, other having 0 controls, I left it
that way I can add ADC controls later.
I am now going through that whole SDR patch serie and I will likely post
fixed version tonight.
regards
Antti
--
http://palosaari.fi/
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