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

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Date:	Fri, 19 Feb 2010 13:57:08 +0100
From:	Thomas Weber <weber@...science.de>
To:	Tomi Valkeinen <tomi.valkeinen@...ia.com>
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

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
>
>
> --
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>
>
>   
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?

Thomas


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