>>>include/media/davinci/ccdc_dm355.h - line 851:
>>>static inline void ccdc_setfbaddr(unsigned long paddr){
>>> regw((paddr >> 21) & 0x007f, STADRH);
>>> regw((paddr >> 5) & 0x0ffff, STADRL);
>>>}
>>>
>>>I don't catch why should be shifted low part of the address... well, I
>>>don't catch the high part as well.(shifted by 21? why?) :P
[MK] I think you are trying to debug an issue in your custom board. To explain
your question, this is as per the hardware user guide for VPFE. See the
description for STADRL & STADRH.
STADRL
Lower 16 bits of the SDRAM starting address for CCDC output
The address is specified offset from the SDRAM base address in units of 32
bytes.
STADRH
Upper 7 bits of the SDRAM starting address for CCDC output
The address is specified offset from the SDRAM base address in units of 32
bytes.
So the first step is to subtract the SDRAM address from the base address.
Then the offset should be specified in units of 32 byes (we already make sure
the address is aligned to 32 byte boundary in VPFE capture driver. So divide
the offset by 32 or shift right by 5).
regw((paddr >> 5) & 0x0ffff, STADRL);
>> take lower 16 bit and shift right by 5
regw((paddr >> 21) & 0x007f, STADRH);
>> shift upper by 16 to get it to lower 16 bits and then shift it by additional
>> 5 to get the value to be in units of 32 bytes (total shift 5 + 16 = 21)
Hope this explains.
If you are not seeing interrupt, make sure the sensor is providing VD signal.
Also you can check arm interrupt by doing...
[EMAIL PROTECTED]:/opt/lsp210# cat /proc/interrupts
CPU0
0: 31686 AINTC vpfe_capture
5: 0 AINTC dm644xpreviewer
6: 0 AINTC dm644xresizer
8: 3554093 AINTC davinci_osd
12: 1 AINTC musb_hdrc
13: 245992 AINTC mac
16: 0 AINTC EDMA Completion
17: 1 AINTC EDMA CC Err
18: 0 AINTC EDMA TC0 Error
19: 0 AINTC EDMA TC1 Error
22: 8 AINTC ide0
26: 118608 AINTC davinci-mmc
32: 5930694 AINTC clockevent
33: 372 AINTC free-run counter
39: 96317 AINTC i2c_davinci
40: 15600 AINTC serial
In this case vpfe_capture count (31686) should increment.
>>>Thanks, bye
>>>--
>>>Andrea Gasparini
>>>---- ImaVis S.r.l. ----
>>>web: www.imavis.com
>>>
>>>_______________________________________________
>>>Davinci-linux-open-source mailing list
>>>[email protected]
>>>http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
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