Re: 3.12-rc1: no longer compiles for Nokia n900 (omap based), display no longer works

Pavel Machek
2013-09-26T00:23:52Z

Hi!

> On Thu, Sep 19, 2013 at 11:44:02AM +0200, Pavel Machek wrote:
> > something in 3.12-rc1 broke display :-(. (dmesg diff attached at the
> > end, maybe someone knows...)
>
> 3.12-rc1 for N900 compiles and works (also display) here with binutils
> 2.23.2.

I updated to eldk-5.4, and now it compiles, but still no display on

> > + omapfb omapfb: no displays
>
> [...]
>
> > - acx565akm spi1.2: omapfb: acx565akm rev 12 LCD detected
>
> I think this is because the panel driver has changed, and the old one
> was deleted. You need to change your kernel configuration with something
> like below:
>
> -CONFIG_PANEL_ACX565AKM=y
> +CONFIG_DISPLAY_PANEL_SONY_ACX565AKM=y

Thanks for the hint.. but apparently it was not enough. Still no
display on qemu :-(.

Anyway, "make oldconfig" is expected to produce working kernel, which
is clearly not case here. Perhaps this should be added to fix that?

[Who can take the patch?]
Pavel

PS: whoever named directory in kernel sources "displays-new" should...
think again.

Signed-off-by: Pavel Machek <pavel@ucw.cz>

index 6c90885..d3eabd2 100644
--- a/drivers/video/omap2/displays-new/Kconfig
+++ b/drivers/video/omap2/displays-new/Kconfig
@@ -40,6 +40,7 @@ config DISPLAY_PANEL_DSI_CM

config DISPLAY_PANEL_SONY_ACX565AKM
tristate "ACX565AKM Panel"
+ default PANEL_ACX565AKM
depends on SPI && BACKLIGHT_CLASS_DEVICE
help
This is the LCD panel used on Nokia N900

--
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