From: Grazvydas Ignotas <notasas@gmail.com>
To: "Hiremath, Vaibhav" <hvaibhav@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@nokia.com>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
"linux-fbdev@vger.kernel.org" <linux-fbdev@vger.kernel.org>
Subject: Re: [PATCH 01/13] OMAP: DSS2: enable VDDS_DSI when using DPI
Date: Mon, 15 Feb 2010 14:02:07 +0000 [thread overview]
Message-ID: <6ed0b2681002150602p6f62c647nd68c7a32a84587f0@mail.gmail.com> (raw)
In-Reply-To: <19F8576C6E063C45BE387C64729E7394044A96DF16@dbde02.ent.ti.com>
On Mon, Feb 15, 2010 at 2:11 PM, Hiremath, Vaibhav <hvaibhav@ti.com> wrote:
>> -----Original Message-----
>> From: Tomi Valkeinen [mailto:tomi.valkeinen@nokia.com]
>> Sent: Monday, February 15, 2010 4:28 PM
>> To: Hiremath, Vaibhav
>> Cc: linux-omap@vger.kernel.org; linux-fbdev@vger.kernel.org
>> Subject: RE: [PATCH 01/13] OMAP: DSS2: enable VDDS_DSI when using
>> DPI
>>
>> On Mon, 2010-02-15 at 11:22 +0100, ext Hiremath, Vaibhav wrote:
>> > > -----Original Message-----
>> > > From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
>> > > owner@vger.kernel.org] On Behalf Of Tomi Valkeinen
>> > > Sent: Monday, February 08, 2010 9:26 PM
>> > > To: linux-omap@vger.kernel.org; linux-fbdev@vger.kernel.org
>> > > Cc: Tomi Valkeinen
>> > > Subject: [PATCH 01/13] OMAP: DSS2: enable VDDS_DSI when using
>> DPI
>> > >
>> > > It looks like on OMAP3 some DSS pins need VDDS_DSI to function
>> > > properly.
>> > >
>> > > This has not been confirmed from TI, but looking at figure 15-1
>> > > "Display
>> > > subsystem highlight" from the TRM, some data pins come near the
>> DSI
>> > > and SDI
>> > > blocks. This is not very hard evidence, but the fact remains
>> that
>> > > with the
>> > > power on, pixels are ok, and with the power off, pixels are not
>> ok.
>> > >
>> > [Hiremath, Vaibhav] Tomi, sorry for delayed response. As usual
>> stuck with some other issues. Below are some quick comments -
>> >
>> > I am not regulator expert, but as per my finding I believe it is
>> nothing to do with pins position closure to each other. The actual
>> root cause is TWL4030 Ownership bit. Please refer to the below mail-
>> chain -
>> >
>> > http://marc.info/?l=linux-omap&m\x126045146600334&w=2
>>
>> But why is there a dependency on a regulator, if it has nothing to
>> do
>> with the pins? Why is vdds_dsi/vdds_sdi needed to get all pixels
>> through?
> [Hiremath, Vaibhav] I am not sure, what role ownership bit is playing here.
It effectively enables or disables the regulator.
>
> Thanks,
> Vaibhav
>
>>
>> Tomi
>>
>
> --
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prev parent reply other threads:[~2010-02-15 14:02 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-08 15:55 [PATCH 00/13] OMAP DSS2 patches Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 01/13] OMAP: DSS2: enable VDDS_DSI when using DPI Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 02/13] OMAP: 3430SDP: remove vdvi regulator Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 03/13] OMAP: DSS: Taal: fix error returns in taal_probe() Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 04/13] OMAP: DSS2: OMAPFB: implement OMAPFB_RESERVE_BUFFER Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 05/13] OMAP: DSS2: OMAPFB: implement OMAPFB_GET_DISPLAY_INFO Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 06/13] OMAP: DSS2: fix irq-stats compilation Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 07/13] OMAP: DSS2: OMAPFB: Add omapfb_update_window prototype Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 08/13] OMAP: DSS2: improve DSS clk src selection Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 09/13] OMAP: DSS2: DSI: add dsi_bus_is_locked() Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 10/13] OMAP: DSS2: DSI: add helpers for DCS read/write Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 11/13] OMAP: DSS2: DSI: export dsi_vc_enable_hs() Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 12/13] OMAP: DSS2: DSI: configure all DSI VCs Tomi Valkeinen
2010-02-08 15:56 ` [PATCH 13/13] OMAP: DSS2: DSI: remove dsi_vc_print_status() Tomi Valkeinen
2010-02-15 10:34 ` [PATCH 01/13] OMAP: DSS2: enable VDDS_DSI when using DPI Hiremath, Vaibhav
2010-02-15 10:57 ` Tomi Valkeinen
2010-02-15 12:23 ` Hiremath, Vaibhav
2010-02-15 12:32 ` Tomi Valkeinen
2010-02-15 14:02 ` Grazvydas Ignotas [this message]
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