I'm using DSS2, currently just with a frame buffer to a
[VGA/RGB] monitor.
I'm trying to understand how to set the timing parameters
for my device. The simple 'omapfb.mode=1024x768-24@75'
doesn't quite cut it for some of the devices I need to
use.
Questions:
* How can I get different pixel clocks? I seem to always
end up with 61714285:
# cat /tmp/dbg/omapdss/clk
- dss -
internal clk count 2
dss_ick 83000000 1
dss1_alwon_fck 123428570 1
dss2_alwon_fck 13000000 0
dss_tv_fck 54000000 0
dss_96m_fck 96000000 0
- dispc -
dispc fclk source = dss1_alwon_fclk
pixel clk = 123428570 / 1 / 2 = 61714285
* How can I control the waveform? In particular, the
size and shape of the "porches"? My display seems to
need these settings:
61714,1024/26/162/136,768/3/29/6
I'd like to get this behaviour, either from the boot line
or ideally by default.
* The display also seems to want the sync pulses to be
asserted low (inverted?). Currently, I have this "hard-wired"
into my display device, but I'd also like this to be adjustable.
Thanks for any pointers, etc.
Note: I'm using Tomi's tree from roughly late July
http://www.bat.org/~tomba/git/linux-omap-dss.git
7ae220f46384b34e72b8c3b0c2075a674a3f74fe
Thanks for any pointers
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
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