linux-kernel - Re: [BISECTED] OMAP: DSS: clk rate mismatch

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Date:	Mon, 27 Jan 2014 19:41:44 +0100
From:	Christoph Fritz <chf.fritz@...glemail.com>
To:	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>
Cc:	tomi.valkeinen@...com,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	linux-kernel@...r.kernel.org, pali.rohar@...il.com, pavel@....cz,
	Tero Kristo <t-kristo@...com>, Nishanth Menon <nm@...com>
Subject: Re: [BISECTED] OMAP: DSS: clk rate mismatch

On Mon, 2014-01-27 at 19:30 +0200, Ivaylo Dimitrov wrote:
> linux-next-20140124 DSS is broken on N900  - display stays black (there 
> is some noise though). I booted the kernel with qemu and it gives the 
> following warning:
> 
> [    0.623779] DSS: set fck to 172800000
> [    0.624237] ------------[ cut here ]------------
> [    0.624298] WARNING: CPU: 0 PID: 1 at 
> drivers/video/omap2/dss/dss.c:497 dss_set_fck_rate+0x68/0x8c()
> [    0.624359] clk rate mismatch: 288000000 != 172800000

Here are also clock regressions since next-20140122 regarding
dss_set_fck_rate() and sys_clkout2 occuring in my current patchset for a
dm37xx100 board. Please see here:

 [PATCH v3 0/4] ARM: add omap3 INCOstartec board support
 http://thread.gmane.org/gmane.linux.ports.arm.omap/110095


 Thanks
  -- chf

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