The level shifters used on the Caspa camera module have a 4k output
impedance. Combined with the 100uA pull-up resistors in the OMAP3,
this raises the ground level to 400mV. Adding crosstalk between the
pixel clock and the HS/VS signals on the flat cable (a ground line in
between would have been nice), logic 0 levels can raise up to 650mV.
This exceeds the camera input pins VIL maximum voltage. This change
suggested-by Laurent Pinchart
Signed-off-by: Steve Sakoman <st...@sakoman.com>
---
diff --git a/board/overo/overo.h b/board/overo/overo.h
index 42ef1b1..915f15b 100644
--- a/board/overo/overo.h
+++ b/board/overo/overo.h
@@ -160,10 +160,10 @@ const omap3_sysinfo sysinfo = {
MUX_VAL(CP(DSS_DATA22), (IDIS | PTD | DIS | M0)) /*DSS_DATA22*/\
MUX_VAL(CP(DSS_DATA23), (IDIS | PTD | DIS | M0)) /*DSS_DATA23*/\
/*CAMERA*/\
- MUX_VAL(CP(CAM_HS), (IEN | PTU | EN | M0)) /*CAM_HS */\
- MUX_VAL(CP(CAM_VS), (IEN | PTU | EN | M0)) /*CAM_VS */\
+ MUX_VAL(CP(CAM_HS), (IEN | PTU | DIS | M0)) /*CAM_HS */\
+ MUX_VAL(CP(CAM_VS), (IEN | PTU | DIS | M0)) /*CAM_VS */\
MUX_VAL(CP(CAM_XCLKA), (IDIS | PTD | DIS | M0)) /*CAM_XCLKA*/\
- MUX_VAL(CP(CAM_PCLK), (IEN | PTU | EN | M0)) /*CAM_PCLK*/\
+ MUX_VAL(CP(CAM_PCLK), (IEN | PTU | DIS | M0)) /*CAM_PCLK*/\
MUX_VAL(CP(CAM_FLD), (IDIS | PTD | DIS | M4)) /*CAM_FLD*/\
MUX_VAL(CP(CAM_D0), (IEN | PTD | DIS | M0)) /*CAM_D0*/\
MUX_VAL(CP(CAM_D1), (IEN | PTD | DIS | M0)) /*CAM_D1*/\
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