linux-kernel - Re: [PATCH 5/6] media: sun4i: Add H3 deinterlace driver

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Message-ID: <6033065.vD0Azduf8t@jernej-laptop>
Date:   Fri, 13 Sep 2019 22:06:15 +0200
From:   Jernej Škrabec <jernej.skrabec@...l.net>
To:     Maxime Ripard <mripard@...nel.org>
Cc:     wens@...e.org, robh+dt@...nel.org, mark.rutland@....com,
        mchehab@...nel.org, hverkuil@...all.nl, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 5/6] media: sun4i: Add H3 deinterlace driver

Hi!

Dne petek, 13. september 2019 ob 11:11:47 CEST je Maxime Ripard napisal(a):
> Hi,
> 
> On Thu, Sep 12, 2019 at 10:43:28PM +0200, Jernej Škrabec wrote:
> > Dne četrtek, 12. september 2019 ob 22:26:47 CEST je Maxime Ripard 
napisal(a):
> > > > +	clk_set_rate(dev->mod_clk, 300000000);
> 
> I just realized I missed this too. If you really need the rate to be
> fixed, and if the controller cannot operate properly at any other
> frequency, you probably want to use clk_set_rate_exclusive there.

I don't think that's needed. Parents of deinterlace clock are pll-periph0 and 
pll-periph1 which both have fixed clock and thus deinterlace clock will never 
be changed. I just set it to same frequency as it is set in BSP driver. I 
think it works with 600 MHz too, but that's overkill.

Best regards,
Jernej