From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/4] OMAPDSS: Fix DSS clock multiplier issue on 3703 and probably 3630
Date: Mon, 12 May 2014 14:44:18 +0000 [thread overview]
Message-ID: <5370DE42.2060607@ti.com> (raw)
In-Reply-To: <20140512143934.GC31772@atomide.com>
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On 12/05/14 17:39, Tony Lindgren wrote:
> * Tomi Valkeinen <tomi.valkeinen@ti.com> [140512 04:36]:
>> On 09/05/14 17:37, Tony Lindgren wrote:
>>>
>>> This is just the 3730-evm with the Sharp VGA panel mentioned in
>>> this series.
>>
>> Hmm, well, those both look fine. The fck is well below the maximum,
>> which is somewhere around 170MHz-180MHz. The lck/pck ratio is higher
>> with this patch, but that should affect the GFX overlay.
>>
>> So you're just booting, and there are no applications that use the
>> framebuffer? And there is no rotation or such configured?
>
> Right. The rotation is set to 3 though.
Hmm, that's probably the issue then. VRFB rotation is very heavy on the
memory bandwidth, and is generally a very easy way to get sync lost errors.
My opinion is that VRFB should only be used when you know your system
will handle it fine with the clock rates and bandwidth usage you have
for your use cases.
Tomi
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WARNING: multiple messages have this Message-ID (diff)
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: Tony Lindgren <tony@atomide.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-fbdev@vger.kernel.org, devicetree@vger.kernel.org,
linux-omap@vger.kernel.org
Subject: Re: [PATCH 1/4] OMAPDSS: Fix DSS clock multiplier issue on 3703 and probably 3630
Date: Mon, 12 May 2014 17:44:18 +0300 [thread overview]
Message-ID: <5370DE42.2060607@ti.com> (raw)
In-Reply-To: <20140512143934.GC31772@atomide.com>
[-- Attachment #1: Type: text/plain, Size: 961 bytes --]
On 12/05/14 17:39, Tony Lindgren wrote:
> * Tomi Valkeinen <tomi.valkeinen@ti.com> [140512 04:36]:
>> On 09/05/14 17:37, Tony Lindgren wrote:
>>>
>>> This is just the 3730-evm with the Sharp VGA panel mentioned in
>>> this series.
>>
>> Hmm, well, those both look fine. The fck is well below the maximum,
>> which is somewhere around 170MHz-180MHz. The lck/pck ratio is higher
>> with this patch, but that should affect the GFX overlay.
>>
>> So you're just booting, and there are no applications that use the
>> framebuffer? And there is no rotation or such configured?
>
> Right. The rotation is set to 3 though.
Hmm, that's probably the issue then. VRFB rotation is very heavy on the
memory bandwidth, and is generally a very easy way to get sync lost errors.
My opinion is that VRFB should only be used when you know your system
will handle it fine with the clock rates and bandwidth usage you have
for your use cases.
Tomi
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WARNING: multiple messages have this Message-ID (diff)
From: tomi.valkeinen@ti.com (Tomi Valkeinen)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/4] OMAPDSS: Fix DSS clock multiplier issue on 3703 and probably 3630
Date: Mon, 12 May 2014 17:44:18 +0300 [thread overview]
Message-ID: <5370DE42.2060607@ti.com> (raw)
In-Reply-To: <20140512143934.GC31772@atomide.com>
On 12/05/14 17:39, Tony Lindgren wrote:
> * Tomi Valkeinen <tomi.valkeinen@ti.com> [140512 04:36]:
>> On 09/05/14 17:37, Tony Lindgren wrote:
>>>
>>> This is just the 3730-evm with the Sharp VGA panel mentioned in
>>> this series.
>>
>> Hmm, well, those both look fine. The fck is well below the maximum,
>> which is somewhere around 170MHz-180MHz. The lck/pck ratio is higher
>> with this patch, but that should affect the GFX overlay.
>>
>> So you're just booting, and there are no applications that use the
>> framebuffer? And there is no rotation or such configured?
>
> Right. The rotation is set to 3 though.
Hmm, that's probably the issue then. VRFB rotation is very heavy on the
memory bandwidth, and is generally a very easy way to get sync lost errors.
My opinion is that VRFB should only be used when you know your system
will handle it fine with the clock rates and bandwidth usage you have
for your use cases.
Tomi
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next prev parent reply other threads:[~2014-05-12 14:44 UTC|newest]
Thread overview: 267+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-29 23:52 [PATCH 0/4] OMAPDSS: Add support for panel ls037v7dw01 Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-04-29 23:52 ` [PATCH 1/4] OMAPDSS: Fix DSS clock multiplier issue on 3703 and probably 3630 Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-05-08 23:20 ` Tony Lindgren
2014-05-08 23:20 ` Tony Lindgren
2014-05-08 23:20 ` Tony Lindgren
2014-05-09 8:01 ` Tomi Valkeinen
2014-05-09 8:01 ` Tomi Valkeinen
2014-05-09 8:01 ` Tomi Valkeinen
2014-05-09 14:37 ` Tony Lindgren
2014-05-09 14:37 ` Tony Lindgren
2014-05-09 14:37 ` Tony Lindgren
2014-05-12 11:38 ` Tomi Valkeinen
2014-05-12 11:38 ` Tomi Valkeinen
2014-05-12 11:38 ` Tomi Valkeinen
2014-05-09 7:38 ` Tomi Valkeinen
2014-05-09 7:38 ` Tomi Valkeinen
2014-05-09 7:38 ` Tomi Valkeinen
2014-05-09 14:37 ` Tony Lindgren
2014-05-09 14:37 ` Tony Lindgren
2014-05-09 14:37 ` Tony Lindgren
2014-05-12 11:36 ` Tomi Valkeinen
2014-05-12 11:36 ` Tomi Valkeinen
2014-05-12 11:36 ` Tomi Valkeinen
2014-05-12 14:39 ` Tony Lindgren
2014-05-12 14:39 ` Tony Lindgren
2014-05-12 14:39 ` Tony Lindgren
2014-05-12 14:44 ` Tomi Valkeinen [this message]
2014-05-12 14:44 ` Tomi Valkeinen
2014-05-12 14:44 ` Tomi Valkeinen
2014-05-13 15:26 ` Tony Lindgren
2014-05-13 15:26 ` Tony Lindgren
2014-05-13 15:26 ` Tony Lindgren
2014-05-14 6:41 ` Tomi Valkeinen
2014-05-14 6:41 ` Tomi Valkeinen
2014-05-14 6:41 ` Tomi Valkeinen
2014-05-09 21:06 ` Andreas Müller
2014-05-09 21:06 ` Andreas Müller
2014-05-09 21:06 ` Andreas Müller
2014-05-11 14:42 ` Tony Lindgren
2014-05-11 14:42 ` Tony Lindgren
2014-05-11 14:42 ` Tony Lindgren
2014-05-12 8:20 ` Andreas Müller
2014-05-12 8:20 ` Andreas Müller
2014-05-12 8:20 ` Andreas Müller
2014-05-12 14:40 ` Tony Lindgren
2014-05-12 14:40 ` Tony Lindgren
2014-05-12 14:40 ` Tony Lindgren
2014-04-29 23:52 ` [PATCH 2/4] OMAPDSS: panel-sharp-ls037v7dw01: update to use gpiod Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-05-07 8:15 ` Tomi Valkeinen
2014-05-07 8:15 ` Tomi Valkeinen
2014-05-07 8:15 ` Tomi Valkeinen
2014-05-08 23:25 ` Tony Lindgren
2014-05-08 23:25 ` Tony Lindgren
2014-05-08 23:25 ` Tony Lindgren
2014-04-29 23:52 ` [PATCH 3/4] OMAPDSS: panel-sharp-ls037v7dw01: add device tree support Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-05-07 8:12 ` Tomi Valkeinen
2014-05-07 8:12 ` Tomi Valkeinen
2014-05-07 8:12 ` Tomi Valkeinen
2014-05-07 15:03 ` Tony Lindgren
2014-05-07 15:03 ` Tony Lindgren
2014-05-07 15:03 ` Tony Lindgren
2014-05-07 16:02 ` Tomi Valkeinen
2014-05-07 16:02 ` Tomi Valkeinen
2014-05-07 16:02 ` Tomi Valkeinen
2014-05-07 17:59 ` Tony Lindgren
2014-05-07 17:59 ` Tony Lindgren
2014-05-07 17:59 ` Tony Lindgren
2014-05-08 23:33 ` Tony Lindgren
2014-05-08 23:33 ` Tony Lindgren
2014-05-08 23:33 ` Tony Lindgren
2014-05-09 7:24 ` Tomi Valkeinen
2014-05-09 7:24 ` Tomi Valkeinen
2014-05-09 7:24 ` Tomi Valkeinen
2014-05-09 15:55 ` Tony Lindgren
2014-05-09 15:55 ` Tony Lindgren
2014-05-09 15:55 ` Tony Lindgren
2014-05-12 7:38 ` Tomi Valkeinen
2014-05-12 7:38 ` Tomi Valkeinen
2014-05-12 7:38 ` Tomi Valkeinen
2014-05-12 9:34 ` Javier Martinez Canillas
2014-05-12 9:34 ` Javier Martinez Canillas
2014-05-12 9:34 ` Javier Martinez Canillas
2014-05-12 9:40 ` Tomi Valkeinen
2014-05-12 9:40 ` Tomi Valkeinen
2014-05-12 9:40 ` Tomi Valkeinen
2014-05-12 10:00 ` Javier Martinez Canillas
2014-05-12 10:00 ` Javier Martinez Canillas
2014-05-12 10:00 ` Javier Martinez Canillas
2014-05-12 14:26 ` Tony Lindgren
2014-05-12 14:26 ` Tony Lindgren
2014-05-12 14:26 ` Tony Lindgren
2014-05-12 14:55 ` Tomi Valkeinen
2014-05-12 14:55 ` Tomi Valkeinen
2014-05-12 14:55 ` Tomi Valkeinen
2014-05-12 15:51 ` Tony Lindgren
2014-05-12 15:51 ` Tony Lindgren
2014-05-12 15:51 ` Tony Lindgren
2014-05-13 10:51 ` Tomi Valkeinen
2014-05-13 10:51 ` Tomi Valkeinen
2014-05-13 10:51 ` Tomi Valkeinen
2014-05-13 11:39 ` Javier Martinez Canillas
2014-05-13 11:39 ` Javier Martinez Canillas
2014-05-13 11:39 ` Javier Martinez Canillas
2014-05-13 15:25 ` Tony Lindgren
2014-05-13 15:25 ` Tony Lindgren
2014-05-13 15:25 ` Tony Lindgren
2014-05-14 6:19 ` Tomi Valkeinen
2014-05-14 6:19 ` Tomi Valkeinen
2014-05-14 6:19 ` Tomi Valkeinen
2014-05-14 16:02 ` Tony Lindgren
2014-05-14 16:02 ` Tony Lindgren
2014-05-14 16:02 ` Tony Lindgren
2014-05-15 9:23 ` Tomi Valkeinen
2014-05-15 9:23 ` Tomi Valkeinen
2014-05-15 9:23 ` Tomi Valkeinen
2014-05-15 18:21 ` Tony Lindgren
2014-05-15 18:21 ` Tony Lindgren
2014-05-15 18:21 ` Tony Lindgren
2014-05-16 5:56 ` Tomi Valkeinen
2014-05-16 5:56 ` Tomi Valkeinen
2014-05-16 5:56 ` Tomi Valkeinen
2014-05-16 16:07 ` Tony Lindgren
2014-05-16 16:07 ` Tony Lindgren
2014-05-16 16:07 ` Tony Lindgren
2014-05-16 17:41 ` Sebastian Reichel
2014-05-16 17:41 ` Sebastian Reichel
2014-05-16 17:41 ` Sebastian Reichel
2014-05-16 18:01 ` Tony Lindgren
2014-05-16 18:01 ` Tony Lindgren
2014-05-16 18:01 ` Tony Lindgren
2014-05-16 21:39 ` Tony Lindgren
2014-05-16 21:39 ` Tony Lindgren
2014-05-16 21:39 ` Tony Lindgren
2014-05-19 9:48 ` Tomi Valkeinen
2014-05-19 9:48 ` Tomi Valkeinen
2014-05-19 9:48 ` Tomi Valkeinen
2014-05-19 15:57 ` Tony Lindgren
2014-05-19 15:57 ` Tony Lindgren
2014-05-19 15:57 ` Tony Lindgren
2014-05-19 16:43 ` Arnd Bergmann
2014-05-19 16:43 ` Arnd Bergmann
2014-05-19 16:43 ` Arnd Bergmann
2014-05-19 18:57 ` Tomi Valkeinen
2014-05-19 18:57 ` Tomi Valkeinen
2014-05-19 18:57 ` Tomi Valkeinen
2014-05-19 19:51 ` Tony Lindgren
2014-05-19 19:51 ` Tony Lindgren
2014-05-19 19:51 ` Tony Lindgren
2014-05-21 13:05 ` Tomi Valkeinen
2014-05-21 13:05 ` Tomi Valkeinen
2014-05-21 13:05 ` Tomi Valkeinen
2014-05-21 14:24 ` Sebastian Reichel
2014-05-21 14:24 ` Sebastian Reichel
2014-05-21 14:24 ` Sebastian Reichel
2014-05-20 4:57 ` Sebastian Reichel
2014-05-20 4:57 ` Sebastian Reichel
2014-05-20 4:57 ` Sebastian Reichel
2014-05-20 5:21 ` Tomi Valkeinen
2014-05-20 5:21 ` Tomi Valkeinen
2014-05-20 5:21 ` Tomi Valkeinen
2014-05-19 9:21 ` Tomi Valkeinen
2014-05-19 9:21 ` Tomi Valkeinen
2014-05-19 9:21 ` Tomi Valkeinen
2014-05-19 16:04 ` Tony Lindgren
2014-05-19 16:04 ` Tony Lindgren
2014-05-19 16:04 ` Tony Lindgren
2014-05-19 19:05 ` Tomi Valkeinen
2014-05-19 19:05 ` Tomi Valkeinen
2014-05-19 19:05 ` Tomi Valkeinen
2014-05-20 5:12 ` Sebastian Reichel
2014-05-20 5:12 ` Sebastian Reichel
2014-05-20 5:12 ` Sebastian Reichel
2014-05-20 5:48 ` Tony Lindgren
2014-05-20 5:48 ` Tony Lindgren
2014-05-20 5:48 ` Tony Lindgren
2014-05-20 21:10 ` Sebastian Reichel
2014-05-20 21:10 ` Sebastian Reichel
2014-05-20 21:10 ` Sebastian Reichel
2014-05-09 8:31 ` Tomi Valkeinen
2014-05-09 8:31 ` Tomi Valkeinen
2014-05-09 8:31 ` Tomi Valkeinen
2014-05-09 15:30 ` Tony Lindgren
2014-05-09 15:30 ` Tony Lindgren
2014-05-09 15:30 ` Tony Lindgren
2014-05-13 21:26 ` Tony Lindgren
2014-05-13 21:26 ` Tony Lindgren
2014-05-13 21:26 ` Tony Lindgren
2014-05-15 8:41 ` Tomi Valkeinen
2014-05-15 8:41 ` Tomi Valkeinen
2014-05-15 8:41 ` Tomi Valkeinen
2014-05-15 18:25 ` Tony Lindgren
2014-05-15 18:25 ` Tony Lindgren
2014-05-15 18:25 ` Tony Lindgren
2014-05-16 5:50 ` Tomi Valkeinen
2014-05-16 5:50 ` Tomi Valkeinen
2014-05-16 5:50 ` Tomi Valkeinen
2014-05-16 15:59 ` Tony Lindgren
2014-05-16 15:59 ` Tony Lindgren
2014-05-16 15:59 ` Tony Lindgren
2014-05-15 13:07 ` Tomi Valkeinen
2014-05-15 13:07 ` Tomi Valkeinen
2014-05-15 13:07 ` Tomi Valkeinen
2014-05-15 18:27 ` Tony Lindgren
2014-05-15 18:27 ` Tony Lindgren
2014-05-15 18:27 ` Tony Lindgren
2014-04-29 23:52 ` [PATCH 4/4] ARM: dts: Add LCD panel sharp ls037v7dw01 support for omap3-evm and ldp Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-04-29 23:52 ` Tony Lindgren
2014-04-30 1:07 ` Joachim Eastwood
2014-04-30 1:07 ` Joachim Eastwood
2014-04-30 1:07 ` Joachim Eastwood
2014-04-30 17:47 ` Tony Lindgren
2014-04-30 17:47 ` Tony Lindgren
2014-04-30 17:47 ` Tony Lindgren
2014-05-05 18:39 ` Tony Lindgren
2014-05-05 18:39 ` Tony Lindgren
2014-05-05 18:39 ` Tony Lindgren
2014-05-08 23:36 ` Tony Lindgren
2014-05-08 23:36 ` Tony Lindgren
2014-05-08 23:36 ` Tony Lindgren
2014-05-09 7:07 ` Tomi Valkeinen
2014-05-09 7:07 ` Tomi Valkeinen
2014-05-09 7:07 ` Tomi Valkeinen
2014-05-09 15:37 ` Tony Lindgren
2014-05-09 15:37 ` Tony Lindgren
2014-05-09 15:37 ` Tony Lindgren
2014-05-13 21:32 ` Tony Lindgren
2014-05-13 21:32 ` Tony Lindgren
2014-05-13 21:32 ` Tony Lindgren
2014-05-15 8:57 ` Tomi Valkeinen
2014-05-15 8:57 ` Tomi Valkeinen
2014-05-15 8:57 ` Tomi Valkeinen
2014-05-21 12:44 ` Tomi Valkeinen
2014-05-21 12:44 ` Tomi Valkeinen
2014-05-21 12:44 ` Tomi Valkeinen
2014-05-21 14:50 ` Tony Lindgren
2014-05-21 14:50 ` Tony Lindgren
2014-05-21 14:50 ` Tony Lindgren
2014-05-27 20:59 ` Tony Lindgren
2014-05-27 20:59 ` Tony Lindgren
2014-05-27 20:59 ` Tony Lindgren
2014-05-27 21:14 ` Tony Lindgren
2014-05-27 21:14 ` Tony Lindgren
2014-05-27 21:14 ` Tony Lindgren
2014-05-28 6:31 ` Tomi Valkeinen
2014-05-28 6:31 ` Tomi Valkeinen
2014-05-28 6:31 ` Tomi Valkeinen
2014-05-28 6:34 ` Tomi Valkeinen
2014-05-28 6:34 ` Tomi Valkeinen
2014-05-28 6:34 ` Tomi Valkeinen
2014-05-05 18:41 ` [PATCH 0/4] OMAPDSS: Add support for panel ls037v7dw01 Tony Lindgren
2014-05-05 18:41 ` Tony Lindgren
2014-05-05 18:41 ` Tony Lindgren
2014-05-09 9:34 ` Tomi Valkeinen
2014-05-09 9:34 ` Tomi Valkeinen
2014-05-09 9:34 ` Tomi Valkeinen
2014-05-09 15:55 ` Tony Lindgren
2014-05-09 15:55 ` Tony Lindgren
2014-05-09 15:55 ` Tony Lindgren
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