From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: Adam Ford <aford173@gmail.com>,
"H. Nikolaus Schaller" <hns@goldelico.com>
Cc: "Tero Kristo" <t-kristo@ti.com>,
"Tony Lindgren" <tony@atomide.com>,
Linux-OMAP <linux-omap@vger.kernel.org>,
"Adam Ford" <adam.ford@logicpd.com>,
"Benoît Cousson" <bcousson@baylibre.com>,
dri-devel <dri-devel@lists.freedesktop.org>,
devicetree <devicetree@vger.kernel.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] drm/omap: Migrate minimum FCK/PCK ratio from Kconfig to dts
Date: Mon, 30 Sep 2019 17:27:05 +0300 [thread overview]
Message-ID: <3777f1b1-2d9a-334b-b9e7-99dfda2ae29b@ti.com> (raw)
In-Reply-To: <04306a5e-f9be-35a4-1aa1-5795d780e289@ti.com>
On 30/09/2019 17:20, Tomi Valkeinen wrote:
> Let's see what Tero says, but yeah, something is odd here. I expected
> the max divider to be 16 with Tero's patch, but I don't see it having
> that effect. I can get the div to 31.
>
> You can see this from the clock register 0x48004e40 (CM_CLKSEL_DSS). The
> lowest bits are the divider, 5 to 0. The TRM says max div is 32.
>
> Tero said for him the dividers > 16 didn't "stick" to the register. I'm
> now wondering if he has an old beagleboard with OMAP34xx, which has max
> div 16.
So testing a bit more here, I can see the DSS working fine and fps as
expected when I write values directly to CM_CLKSEL_DSS:5:0, with
dividers up to 31. With 32, DSS breaks. The TRM (AM/DM37x) says value 32
is valid.
Tomi
--
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next prev parent reply other threads:[~2019-09-30 14:27 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-10 19:42 [PATCH] drm/omap: Migrate minimum FCK/PCK ratio from Kconfig to dts Adam Ford
2019-05-28 11:11 ` Tomi Valkeinen
2019-05-28 15:09 ` Adam Ford
2019-05-28 15:20 ` H. Nikolaus Schaller
2019-05-28 15:53 ` Tomi Valkeinen
2019-05-31 12:13 ` Adam Ford
2019-09-25 20:51 ` Adam Ford
2019-09-26 6:55 ` Tomi Valkeinen
2019-09-26 14:12 ` Adam Ford
2019-09-27 6:21 ` Tomi Valkeinen
2019-09-27 12:13 ` Adam Ford
2019-09-27 13:45 ` Tomi Valkeinen
2019-09-27 7:55 ` Tomi Valkeinen
2019-09-27 12:33 ` Adam Ford
2019-09-27 13:47 ` Tomi Valkeinen
2019-09-27 15:37 ` Tero Kristo
2019-09-27 15:47 ` Tomi Valkeinen
2019-09-30 6:45 ` Tomi Valkeinen
2019-09-30 8:53 ` Tero Kristo
2019-09-30 12:41 ` Adam Ford
2019-09-30 12:47 ` Tero Kristo
2019-09-30 13:17 ` Adam Ford
2019-09-30 13:35 ` Tomi Valkeinen
2019-09-30 13:38 ` H. Nikolaus Schaller
2019-09-30 13:54 ` Adam Ford
2019-09-30 14:04 ` Adam Ford
2019-09-30 14:12 ` Adam Ford
2019-09-30 14:20 ` Tomi Valkeinen
2019-09-30 14:27 ` Tomi Valkeinen [this message]
2019-09-30 14:56 ` H. Nikolaus Schaller
2019-09-30 15:10 ` Adam Ford
2019-09-30 17:48 ` Tero Kristo
2019-10-01 5:07 ` Tomi Valkeinen
2019-10-01 5:12 ` Tero Kristo
2019-10-01 8:12 ` Tero Kristo
2019-10-01 9:31 ` Tomi Valkeinen
2019-10-01 13:06 ` Adam Ford
2019-10-01 13:14 ` Tomi Valkeinen
2019-09-25 21:26 ` Andrew F. Davis
2019-06-13 20:22 ` Rob Herring
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