Re: [PATCH 1/2] clk: tegra114: Rename gr_2d/gr_3d to gr2d/gr3d

["Terje Bergström" <tbergstrom-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>]

On 08.10.2013 10:53, Peter De Schrijver wrote:
> On Mon, Oct 07, 2013 at 04:53:44PM +0200, Thierry Reding wrote:
>> What's wrong with pll_c? We've used it for Tegra20 and Tegra30 and I
>> have at least tested that gr2d works properly with it. It will also
>> cause both host1x and gr2d to run off the same clock, which I guess may
>> not matter at all.
> Using pll_c2 is consistent with our policy in downstream. It allows more
> freedom in scaling gr2d independently from host1x.

host1x really should be on a clock that is not scaled. This is because
it has some registers that need to be calibrated to the clock rate. It's
a pain to recalibrate whenever clock rate is modified. This is why
host1x is on PLLP downstream.

2D on the other hand (and all clients) is a prime candidate for clock
scaling.

This all is of course just hypothetical as long as we don't really scale
host1x' or its clients' clocks.

Terje