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authorMauro Carvalho Chehab <mchehab@redhat.com>2009-07-14 03:18:39 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-07-24 14:03:26 -0300
commitd36bb4e77257ed0df86deca3f69794f037f68c7d (patch)
tree0e9352299d3158eb6f9fff87a3dcff9a39e881f5 /drivers/media/video/em28xx
parent2ea472ff704a8a94b3b9abec438db23e512be337 (diff)
V4L/DVB (12243): em28xx: allow specifying sensor xtal frequency
In order to properly estimate fps, mt9v011 sensor driver needs to know what is the used frequency on the sensor cristal. Adds the proper fields and initialization code for specifying the cristal frequency. Also, based on experimentation, it was noticed that the Silvercrest is outputing data at 7 fps. This means that it should be using a 6.3 MHz cristal. This information needs to be double checked later, by opening the device. Anyway, by using this value for xtal, at least now we have the correct fps report. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/em28xx')
-rw-r--r--drivers/media/video/em28xx/em28xx-cards.c11
-rw-r--r--drivers/media/video/em28xx/em28xx.h2
2 files changed, 10 insertions, 3 deletions
diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c
index d4a7e6075cc..82536dd6b0f 100644
--- a/drivers/media/video/em28xx/em28xx-cards.c
+++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -1734,6 +1734,7 @@ static int em28xx_hint_sensor(struct em28xx *dev)
dev->em28xx_sensor = EM28XX_MT9V011;
dev->sensor_xres = 640;
dev->sensor_yres = 480;
+ dev->sensor_xtal = 6300000;
break;
default:
printk("Unknown Micron Sensor 0x%04x\n", be16_to_cpu(version));
@@ -2261,9 +2262,13 @@ void em28xx_card_setup(struct em28xx *dev)
v4l2_i2c_new_probed_subdev(&dev->v4l2_dev, &dev->i2c_adap,
"tvp5150", "tvp5150", tvp5150_addrs);
- if (dev->em28xx_sensor == EM28XX_MT9V011)
- v4l2_i2c_new_probed_subdev(&dev->v4l2_dev, &dev->i2c_adap,
- "mt9v011", "mt9v011", mt9v011_addrs);
+ if (dev->em28xx_sensor == EM28XX_MT9V011) {
+ struct v4l2_subdev *sd;
+
+ sd = v4l2_i2c_new_probed_subdev(&dev->v4l2_dev,
+ &dev->i2c_adap, "mt9v011", "mt9v011", mt9v011_addrs);
+ v4l2_subdev_call(sd, core, s_config, 0, &dev->sensor_xtal);
+ }
if (dev->board.adecoder == EM28XX_TVAUDIO)
v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h
index 71444ddbe40..ce76633786c 100644
--- a/drivers/media/video/em28xx/em28xx.h
+++ b/drivers/media/video/em28xx/em28xx.h
@@ -478,8 +478,10 @@ struct em28xx {
struct v4l2_device v4l2_dev;
struct em28xx_board board;
+ /* Webcam specific fields */
enum em28xx_sensor em28xx_sensor;
int sensor_xres, sensor_yres;
+ int sensor_xtal;
unsigned int stream_on:1; /* Locks streams */
unsigned int has_audio_class:1;