[PATCH] drm/omap: Migrate minimum FCK/PCK ratio from Kconfig to dts
tomi.valkeinen at ti.com
Mon Sep 30 14:27:05 UTC 2019
On 30/09/2019 17:20, Tomi Valkeinen wrote:
> Let's see what Tero says, but yeah, something is odd here. I expected
> the max divider to be 16 with Tero's patch, but I don't see it having
> that effect. I can get the div to 31.
> You can see this from the clock register 0x48004e40 (CM_CLKSEL_DSS). The
> lowest bits are the divider, 5 to 0. The TRM says max div is 32.
> Tero said for him the dividers > 16 didn't "stick" to the register. I'm
> now wondering if he has an old beagleboard with OMAP34xx, which has max
> div 16.
So testing a bit more here, I can see the DSS working fine and fps as
expected when I write values directly to CM_CLKSEL_DSS:5:0, with
dividers up to 31. With 32, DSS breaks. The TRM (AM/DM37x) says value 32
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