Thread (39 messages) 39 messages, 4 authors, 2017-02-24

Re: [PATCH 05/12] drm/ast: Fix calculation of MCLK

From: Joel Stanley <joel@jms.id.au>
Date: 2017-02-24 03:12:43
Also in: dri-devel

On Fri, Feb 24, 2017 at 1:08 PM, Benjamin Herrenschmidt
[off-list ref] wrote:
On Fri, 2017-02-24 at 12:54 +1030, Joel Stanley wrote:
quoted
On Fri, Feb 24, 2017 at 9:23 AM, Benjamin Herrenschmidt
[off-list ref] wrote:
quoted
Some braces were missing causing an incorrect calculation.

Y.C. Chen from Aspeed provided me with the right formula
which I tested on AST2400 and 2500.
Y. C. Chen, can you point out this calculation in the programming
guide?

All of the PLL calculations I can find in the ast2400 documentation
are different to this one.
Different PLL register, see my other email. I've checked the result
of the calculation on our AST2500 and AST2400 machines.
I see now. It woudl be good to see the calculation added to Aspeed's
documentation in the future.

Acked-by: Joel Stanley <joel@jms.id.au>

Cheers,

Joel
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