Hello
I have a problem supporting OV7725 CMOS sensor in YCbCr 8 bit SYNC mode for my DM365 board.
using DVSDK_2_10_01_18
- when I implement in BT.656 mode, OV7725 sensor works very fine in the dvsdk encode demo program.
- when I implement in YCbCr 8 bit SYNC mode for the same OV7725 sensor, vpfe_imp_dma_isr() in drivers/media/video/davinci/davinci_vpfe.c is never called.
- so when I intentionally call vpfe_imp_dma_isr() at the end of vpfe_isr() function like followings, ov7725 works fine in the dvsdk encode demo program.
static irqreturn_t vpfe_isr()
{
...
// I added.
vpfe_imp_dma_isw(irq, dev_id, regs);
return IRQ_RETVAL(1);
}
My questions are:
1. When does VPSS_RSZ_INT_SDR or RSZ_INT_DMA interrupt is generated ? I looked the VPFE datasheet. but there was not enough information regarding this.
2. I guess BT.656 and YCbCr 8 SYNC mode is almost same. If so, why does this probem happen?
I checked VPFE registers and all the registers values are same except followings registers.
- MODESET.VDPOL
- REC656IF
- RZA_SDR_C_BAD_H
- RZA_SDR_C_SAD_H
- INSTAT
The only code difference is INTERFACE_TYPE_BT656 or INTERFACE_TYPE_YCBCR_SYNC_8 in if_type like followings:
in ov7725.c file:
static struct decoder_device ov7725_dev[] = {
{
.name = "ov7725",
#if BT656 mode
.if_type = INTERFACE_TYPE_BT656,
#else
.if_type = INTERFACE_TYPE_YCBCR_SYNC_8
#endif
....
};
