Omap4 DSS clocks
Christoph Fritz
chf.fritz at googlemail.com
Thu Mar 14 11:06:33 EDT 2013
On Thu, 2013-03-14 at 14:46 +0100, Christoph Fritz wrote:
> On Thu, 2013-03-14 at 14:33 +0100, Sascha Hauer wrote:
> > I wouldn't expect a bug in the code. This would have been discovered
> > already.
>
> Register CM_DSS_DSS_CLKCTRL (0x4a009120) reads 0x00070F02 and so the
> field [17:16] IDLEST reads 0x3 which means "Module is disabled and
> cannot be accessed". On linux, its 0x2 which means "functional".
I already asked about this on the TI E2E Community forum
http://e2e.ti.com/support/omap/f/849/t/251717.aspx but without gaining
success.
Overall, isn't it weird that DSS is offline (as indicated by IDLEST)?
I suppose in ./arch/arm/mach-omap/omap4_clock.c this check:
/* Check for DSS Clocks */
while ((__raw_readl(0x4A009100) & 0xF00) != 0xE00)
;
should get extended to also check for correct IDLEST ...which would
currently end in an endless loop :)
Thanks
-- Christoph
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