For the ov7670 camera to return images at the requested frame rate,
it needs to make calculations based on the clock speed, which is
a completely external factor (depends on the wiring of the system).
On the XO-1.5, which is the only known via-camera user, the camera
is clocked at 90MHz.
Pass this information to the ov7670 driver, to fix an issue where
a framerate of 3x the requested amount was being provided.
Signed-off-by: Daniel Drake <dsd@xxxxxxxxxx>
---
drivers/media/video/via-camera.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/media/video/via-camera.c b/drivers/media/video/via-camera.c
index 20f7237..308e150 100644
--- a/drivers/media/video/via-camera.c
+++ b/drivers/media/video/via-camera.c
@@ -18,6 +18,7 @@
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-chip-ident.h>
+#include <media/ov7670.h>
#include <media/videobuf-dma-sg.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
@@ -1347,11 +1348,21 @@ static __devinit bool viacam_serial_is_enabled(void)
return false;
}
+static struct ov7670_config sensor_cfg = {
+ /* The XO-1.5 (only known user) clocks the camera at 90MHz. */
+ .clock_speed = 90,
+};
+
static __devinit int viacam_probe(struct platform_device *pdev)
{
int ret;
struct i2c_adapter *sensor_adapter;
struct viafb_dev *viadev = pdev->dev.platform_data;
+ struct i2c_board_info ov7670_info = {
+ .type = "ov7670",
+ .addr = 0x42 >> 1,
+ .platform_data = &sensor_cfg,
+ };
/*
* Note that there are actually two capture channels on
@@ -1433,8 +1444,8 @@ static __devinit int viacam_probe(struct platform_device *pdev)
* is OLPC-specific. 0x42 assumption is ov7670-specific.
*/
sensor_adapter = viafb_find_i2c_adapter(VIA_PORT_31);
- cam->sensor = v4l2_i2c_new_subdev(&cam->v4l2_dev, sensor_adapter,
- "ov7670", 0x42 >> 1, NULL);
+ cam->sensor = v4l2_i2c_new_subdev_board(&cam->v4l2_dev, sensor_adapter,
+ &ov7670_info, NULL);
if (cam->sensor == NULL) {
dev_err(&pdev->dev, "Unable to find the sensor!\n");
ret = -ENODEV;
--
1.7.10
--
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