RE: [PATCH 01/13] OMAP: DSS2: enable VDDS_DSI when using DPI

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> -----Original Message-----
> From: Tomi Valkeinen [mailto:tomi.valkeinen@xxxxxxxxx]
> Sent: Monday, February 15, 2010 4:28 PM
> To: Hiremath, Vaibhav
> Cc: linux-omap@xxxxxxxxxxxxxxx; linux-fbdev@xxxxxxxxxxxxxxx
> 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@xxxxxxxxxxxxxxx [mailto:linux-omap-
> > > owner@xxxxxxxxxxxxxxx] On Behalf Of Tomi Valkeinen
> > > Sent: Monday, February 08, 2010 9:26 PM
> > > To: linux-omap@xxxxxxxxxxxxxxx; linux-fbdev@xxxxxxxxxxxxxxx
> > > 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=126045146600334&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.

Thanks,
Vaibhav

> 
>  Tomi
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux