about EDMA

Beny Zhang zhangwx at e4ewireless.net
Sun Mar 25 03:01:13 CST 2007


As I know,the application use V4L API to get the Capture Data from the CCDC,it use the mmap() function.
And if you want to know more about this, please refer to "drivers/media/video/davinci_vpfe.c" and "drivers/media/video/video-buf.c"
and please take attention to below functions 
"vpfe_mmap(struct file *file, struct vm_area_struct *vma)" 
"videobuf_mmap_mapper(struct videobuf_queue *q,struct vm_area_struct *vma)"

Hope it helps.
Regards
Beny

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about EDMA
yin yinhai
Tue, 20 Mar 2007 23:49:53 -0800

Hi all:
Does DVEVM DEMO use EDMA function? if it uses EDMA, where are the correlative fils? I think it needs EMDA to transfer image capture data from CCDC shared buffer logic(SBL) to DDR2, who has this experience, please give me a help, thank you! 

BESTREGARDS
Steven

 




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