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-1.75, which is the only known mmp-camera user, the camera
is clocked at 48MHz.
Pass this information to the ov7670 driver, to fix an issue where
a framerate faster than the requested amount was being provided.
Signed-off-by: Daniel Drake <d...@laptop.org>
---
drivers/media/video/marvell-ccic/mmp-driver.c | 7 +++++++
1 file changed, 7 insertions(+)
Jon, is it OK to assume that XO-1.75 is the only mmp-camera user?
diff --git a/drivers/media/video/marvell-ccic/mmp-driver.c
b/drivers/media/video/marvell-ccic/mmp-driver.c
index c4c17fe..0ba49c7 100644
--- a/drivers/media/video/marvell-ccic/mmp-driver.c
+++ b/drivers/media/video/marvell-ccic/mmp-driver.c
@@ -188,6 +188,13 @@ static int mmpcam_probe(struct platform_device *pdev)
mcam->chip_id = V4L2_IDENT_ARMADA610;
mcam->buffer_mode = B_DMA_sg;
spin_lock_init(&mcam->dev_lock);
+
+ /*
+ * Set the clock speed for the XO-1.75; I don't believe this
+ * driver has ever run anywhere else.
+ */
+ mcam->clock_speed = 48;
+
/*
* Get our I/O memory.
*/
--
1.7.10.1
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