linux-kernel - Re: [RESEND][PATCHv2 4/4] OMAP: DSS2: Add Innolux 7" display for DEVKIT8000

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Message-ID: <1266926095.2411.69.camel@tubuntu.research.nokia.com>
Date:	Tue, 23 Feb 2010 13:54:55 +0200
From:	Tomi Valkeinen <tomi.valkeinen@...ia.com>
To:	ext Thomas Weber <weber@...science.de>
Cc:	ext Jaya Kumar <jayakumar.lkml@...il.com>,
	Thomas Weber <swirl@....li>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND][PATCHv2 4/4] OMAP: DSS2: Add Innolux 7" display for
 DEVKIT8000

On Fri, 2010-02-19 at 13:57 +0100, ext Thomas Weber wrote:
> Tomi Valkeinen wrote:
> > On Fri, 2010-02-12 at 06:55 +0100, ext Jaya Kumar wrote:
> >   
> >> On Fri, Feb 12, 2010 at 3:41 AM, Thomas Weber <swirl@....li> wrote:
> >>     
> >
> > [snip]
> >
> >   
> >>> +
> >>> +static struct omap_video_timings innolux_at_timings = {
> >>> +       .x_res          = 800,
> >>> +       .y_res          = 480,
> >>> +
> >>> +       .pixel_clock    = 40000,
> >>> +
> >>> +       .hsw            = 48,
> >>> +       .hfp            = 1,
> >>> +       .hbp            = 1,
> >>> +
> >>> +       .vsw            = 3,
> >>> +       .vfp            = 12,
> >>> +       .vbp            = 25,
> >>> +};
> >>> +
> >>> +static int innolux_at_panel_probe(struct omap_dss_device *dssdev)
> >>> +{
> >>> +       dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
> >>> +               OMAP_DSS_LCD_IHS;
> >>> +       dssdev->panel.acb = 0x28;
> >>> +       dssdev->panel.timings = innolux_at_timings;
> >>> +
> >>> +       return 0;
> >>> +}
> >>> +
> >>>       
> >> Hi Thomas, Tomi,
> >>
> >> Just curious, does this patch imply that code like this needs to be
> >> written for every single LCD type and resolution that can be connected
> >> to omap2? Maybe there is a better way, like a common table of timings
> >> and values that can be selected with a module option or even
> >> autodetected.
> >>     
> >
> > Yes, it is true that currently you need to write these for every LCD. I
> > have been thinking this issue, and I think we can make a common driver. 
> >
> > However, it's not just selecting timings, as LCDs can have also other
> > characteristics than just the video timings. For example, some may have
> > power on/off line, some reset enable/disable, some need 50ms after
> > reset, some 80ms after reset etc.
> >
> > But if we manage to get a sane set of those settings into the table, we
> > could perhaps cover most of the "dummy" LCDs with it.
> >
> > This change doesn't probably need any changes to the DSS core, only for
> > the panel driver. Any takers for this task? =) 
> >
> >  Tomi
> >
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-omap" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >
> >
> >   
> Hello,
> 
> sorry but I am not able to take the task.
> Make it sense to rework this patch or do you want first the changes to
> the panel driver?

I probably won't have time to implement this generic panel driver yet.
However, I will be merging some DSS driver model changes (sent to
mailing lists) soon, after which this patch needs to be changed a bit.

The changes can be found from
http://gitorious.org/linux-omap-dss2/linux/commits/work but they may
still change a bit.

 Tomi


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