Hi,
surely I'm missing something simple, but I've a problem with writes in
Ipipe registers.
I'm using the Ipipe examples that cames with PSP 01_20_00_014, in
particular the ipipe_vga_example.c.
Given that the code should be ok, I'm looking at the registers in the
driver function ipipe_hw_setup(), and I see a quite strange behavior:
it doens't write the requested value:
For example, I'm trying to write the value 0x3445 in IPIPEIF_CFG, but I'm
reading 0x1000...
Code is pure MV_4.01 kernel, with some debug statemment:
drivers/media/video/davinci/dm355_ipipe_hw.c
This bunch of code at
drivers/media/video/davinci/dm355_ipipe_hw.c:58(about)
regw_if(utemp, IPIPEIF_GFG);
printk("printed %x in ipipeif_gfg\n",utemp);
IPDEBUG("IPIPEIF_GFG",0x01c70104,regr_if(IPIPEIF_GFG));
Tells that:
reading IPIPE_EN @ 1c71000 -> 0
printed 3445 in ipipeif_gfg
reading IPIPEIF_GFG @ 1c70104 -> 1000
Notes:
- IPIPE_EN is low, in the meanwhile of the write operation.
- even if I'm trying to write shadow register, I should read the last value
written as well.
What am I missing???
Thanks for any suggestion.
Regards! :)
--
Andrea Gasparini
---- ImaVis S.r.l. ----
web: www.imavis.com
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