From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grazvydas Ignotas Date: Mon, 15 Feb 2010 14:02:07 +0000 Subject: Re: [PATCH 01/13] OMAP: DSS2: enable VDDS_DSI when using DPI Message-Id: <6ed0b2681002150602p6f62c647nd68c7a32a84587f0@mail.gmail.com> List-Id: References: <1265644572-3578-1-git-send-email-tomi.valkeinen@nokia.com> <1265644572-3578-2-git-send-email-tomi.valkeinen@nokia.com> <19F8576C6E063C45BE387C64729E7394044A96DE7B@dbde02.ent.ti.com> <1266231454.2433.357.camel@tubuntu.research.nokia.com> <19F8576C6E063C45BE387C64729E7394044A96DF16@dbde02.ent.ti.com> In-Reply-To: <19F8576C6E063C45BE387C64729E7394044A96DF16@dbde02.ent.ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: "Hiremath, Vaibhav" Cc: Tomi Valkeinen , "linux-omap@vger.kernel.org" , "linux-fbdev@vger.kernel.org" On Mon, Feb 15, 2010 at 2:11 PM, Hiremath, Vaibhav 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=3Dlinux-omap&m=126045146600334&w=3D2 >> >> 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 her= e. It effectively enables or disables the regulator. > > Thanks, > Vaibhav > >> >> =A0Tomi >> > > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at =A0http://vger.kernel.org/majordomo-info.html >