Mailinglist Archive: radeonhd (265 mails)

[Egbert Eich <eich@xxxxxxx>]

Rafa? Mi?ecki writes:
> 2008/12/13 Rafa? Mi?ecki <zajec5@xxxxxxxxx>:
> > (...)
>
> Thanks to rhd_dump I found registers and values needed for controlling
> backlight!
>
> Now I can control backlight level using rhd_dump -w:
> http://bugzilla.kernel.org/show_bug.cgi?id=11682#c32

It surprises me that the driver backlight control function doesn't
work for you. It is doing pretty much the same as you are doing with
this script.
Can you check three things for me?
1. Check if LVDSSetBacklight() gets called when you call xbacklight.
   It should be visible in a log generated with -logverbose 7.
2. If the answer to 1. is 'yes' then please edit this function in
   src/rhd_dig.c and comment out:
    RHDRegMask(Output, RV620_LVTMA_PWRSEQ_REF_DIV,
               0x144 << LVTMA_BL_MOD_REF_DI_SHIFT,
               0x7ff << LVTMA_BL_MOD_REF_DI_SHIFT);
   See if this makes a difference.
3. Call 'xsetbacklight -set 0' then dump the values of the two 
   registers. Do the same for 'xsetbacklight -set 100'.

Cheers,
        Egbert.

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