RE: [PATCH v3] OMAP3: DSS: Kconfig changes to enable display options on OMAP3

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> -----Original Message-----
> From: Tomi Valkeinen [mailto:tomi.valkeinen@xxxxxxxxx]
> Sent: Wednesday, October 20, 2010 6:22 PM
> To: Nilofer, Samreen
> Cc: Grazvydas Ignotas; Hiremath, Vaibhav; Quadros Roger (Nokia-
> MS/Helsinki); Guruswamy, Senthilvadivu; linux-omap@xxxxxxxxxxxxxxx; linux-
> fbdev@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH v3] OMAP3: DSS: Kconfig changes to enable display
> options on OMAP3
> 
> Hi,
> 
> On Wed, 2010-10-20 at 14:04 +0200, ext Samreen wrote:
> > The defconfig options for display are taken in the respective Kconfig
> > to enable display by default on OMAP3 platforms
> >
> > Signed-off-by: Samreen <samreen@xxxxxx>
> > ---
> >  Version3:
> >        Eliminate the separate default number of FBs for
> >  different architecture. Keeping default FBs as 3 as before.
> >
> >  Version2:
> >         Enables by default NEC panel used in zoom2/3/3630sdp, instead of
> >  Sharp LQ043T1DG01 panel enabled in previous version of this patch
> >
> >  drivers/video/omap2/displays/Kconfig |    3 +++
> >  drivers/video/omap2/dss/Kconfig      |    6 ++++--
> >  drivers/video/omap2/omapfb/Kconfig   |    1 +
> >  3 files changed, 8 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/video/omap2/displays/Kconfig
> b/drivers/video/omap2/displays/Kconfig
> > index f8152cf..d818e44 100644
> > --- a/drivers/video/omap2/displays/Kconfig
> > +++ b/drivers/video/omap2/displays/Kconfig
> > @@ -3,6 +3,7 @@ menu "OMAP2/3 Display Device Drivers"
> >
> >  config PANEL_GENERIC
> >          tristate "Generic Panel"
> > +	default y
> >          help
> >  	  Generic panel driver.
> >  	  Used for DVI output for Beagle and OMAP3 SDP.
> > @@ -10,6 +11,7 @@ config PANEL_GENERIC
> >  config PANEL_SHARP_LS037V7DW01
> >          tristate "Sharp LS037V7DW01 LCD Panel"
> >          depends on OMAP2_DSS
> > +	default y
> >          select BACKLIGHT_CLASS_DEVICE
> >          help
> >            LCD Panel used in TI's SDP3430 and EVM boards
> > @@ -23,6 +25,7 @@ config PANEL_SHARP_LQ043T1DG01
> >  config PANEL_NEC_NL8048HL11_01B
> >  	tristate "NEC NL8048HL11-01B Panel"
> >  	depends on OMAP2_DSS
> > +	default y
> >  	help
> >  		This NEC NL8048HL11-01B panel is TFT LCD
> >  		used in the Zoom2/3/3630 sdp boards.
> 
> What kernel is this based on? There's no Nec driver on my or Linus'
> tree.
> 
> If you enable those panels by default, why not enable all the rest of
> the panels also? And should DSI/SDI/RFBI be enabled also by default, and
> all the panels that require those? Where do we draw the line?
> 
> I feel the only sane options are to keep everything off by default, or
> all on by default. And setting all on by default doesn't sound too good
> either...
> 

[Hiremath, Vaibhav] I agree with Tomi here.

Thanks,
Vaibhav

> > diff --git a/drivers/video/omap2/dss/Kconfig
> b/drivers/video/omap2/dss/Kconfig
> > index 43b6440..f3244a2 100644
> > --- a/drivers/video/omap2/dss/Kconfig
> > +++ b/drivers/video/omap2/dss/Kconfig
> > @@ -1,6 +1,7 @@
> >  menuconfig OMAP2_DSS
> >          tristate "OMAP2/3 Display Subsystem support (EXPERIMENTAL)"
> >          depends on ARCH_OMAP2 || ARCH_OMAP3
> > +	default y
> >          help
> >            OMAP2/3 Display Subsystem support.
> >
> > @@ -9,7 +10,7 @@ if OMAP2_DSS
> >  config OMAP2_VRAM_SIZE
> >  	int "VRAM size (MB)"
> >  	range 0 32
> > -	default 0
> > +	default 4
> >  	help
> >  	  The amount of SDRAM to reserve at boot time for video RAM use.
> >  	  This VRAM will be used by omapfb and other drivers that need
> > @@ -102,7 +103,8 @@ config OMAP2_DSS_FAKE_VSYNC
> >  config OMAP2_DSS_MIN_FCK_PER_PCK
> >  	int "Minimum FCK/PCK ratio (for scaling)"
> >  	range 0 32
> > -	default 0
> > +	default 4  if ARCH_OMAP2 || ARCH_OMAP3
> > +	default 0  if ARCH_OMAP4
> 
> Why is the ratio set to 4 on all OMAP2/3 boards?
> 
>  Tomi
> 

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