Look in the file davinci_platform.c under drivers/media/davinci I
think. This is part of the VPBE Linux driver that gets built into the
to kernel. In that file you'll see a function that sets up the VPBE
registers for 720p. That function will setup the VPBE to output an
external clock.
- Brad
On Sep 26, 2008, at 4:58 AM, pavelhan wrote:
HI,
I need to interface the dm355 VPBE with a LCD using YCC16 format,and
I have get the VGA video displayed on the LCD.Now I need to diaplay
HD video(I means 720P) on the LCD,the default 27MHz is not enough
for this application,so I must use the EXT_CLK about 48MHz to solve
this issue.But I get into a very strange problem:However I configure
the VPBE, I just can't get any signal from the VCLK pin on the
VPBE,all the data and sync signal and clk pin of VPBE is forced to
low.But if I configure the VCLK is from MX1 or MX2 or PLL1,all the
above test is ok.I want to know what is the difference between the
EXT_CLK mode and the others mode?After I configure the PINMUX and
the VPSS_CLK_CTRL properly,what should I do to get a correct VCLK
signal from the input EXT_CLK?
Thank you very much and any help will be appreciated!
2008-09-26
Pavel Han
Oplinx Co.,Ltd
Address:Hanggang Fuchun Business Mansion 2116# Futian, Shenzhen
518041,PRC
Tel: (086)0755-88359865
Website:www.oplinx.com.cn
E-mail: [EMAIL PROTECTED]
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