panda: no gfx due to missing kernel functionality

which linux kernel are you using? there are many flavors of OMAP4 kernel out there, and not all of them have identical content...e.g. if your kernel is based on a recent plain upstream, you might not have the proper display driver for example.

On Mon, Jan 24, 2011 at 07:46:10PM -0000, Nicolas Dechesne wrote:
> which linux kernel are you using? there are many flavors of OMAP4 kernel
> out there, and not all of them have identical content...e.g. if your
> kernel is based on a recent plain upstream, you might not have the
> proper display driver for example.

This will be with the Linaro "mainline" kernel, which is nearly identical to
plain upstream 2.6.37, yes.

--
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@steve, thanks. so then yes I confirmed that it is 'normal'. there is no HDMI support in mainline. I believe there are patches in current mainline (.38-rc) + a couple of pending patch series that enable DVI output on the pandaboard. but that requires you have access to production pandaboard (DVI was not functional for any before A1 board).

On Mon, 24 Jan 2011, Steve Langasek wrote:

> On Mon, Jan 24, 2011 at 07:46:10PM -0000, Nicolas Dechesne wrote:
> > which linux kernel are you using? there are many flavors of OMAP4 kernel
> > out there, and not all of them have identical content...e.g. if your
> > kernel is based on a recent plain upstream, you might not have the
> > proper display driver for example.
>
> This will be with the Linaro "mainline" kernel, which is nearly identical to
> plain upstream 2.6.37, yes.

I'd say that, as far as ARM/OMAP is concerned, this might be more like
2.6.38-rc1. Any missing pieces are welcome though.

Tom has confirmed that neither the headless or ALIP images output gfx which is consistant with the comments above.

@Nicolas, is there somewhere that we can get a list of patches that are needed on top of 2.6.38-rc to enable dvi on Panda?

defect still present in alpha2.

Anand Gadiyar said on 27 January 2011:

| I've checked internally for the status of the display-related patches.
| They will be posted out sometime next week, against the mainline
| kernel, and it should be trivial to apply these against linaro-2.6.37.
| So I will just wait for those patches to be posted.
|
| Warning: I took a sneak peak at the patch set and pointed out
| obvious issues with them. I expect the patches could go
| through more than a few rounds of review on the mailing lists before
| the maintainer would like them :( I'll try and help get them in shape.

I've compiled the patches needed to enable DVI support - from 6 different series submitted to the relevant trees so far. They are available against the linaro-2.6.37 kernel tree here:

git://dev.omapzoom.org/pub/scm/anand/linux-omap-usb.git display-patches-for-linaro-37

and against v2.6.38-rc4 here:

git://dev.omapzoom.org/pub/scm/anand/linux-omap-usb.git display-patches-for-v2.6.38-rc4

Except for the last patch (which is yet to be posted to linux-omap), the individual series for the rest are here (I've linked to only the first patch in each series):
1.
v10 of OMAP2,3 DSS2 HWMOD
https://patchwork.kernel.org/patch/500191/

2.
v3 of DSS2: Generalize clock names
https://patchwork.kernel.org/patch/520191/

3.
v3 of DSS2: OMAP4 DSS HWMOD :
https://patchwork.kernel.org/patch/511211/

4.
OMAP: DSS2: Common IRQ handler for all OMAPs
https://patchwork.kernel.org/patch/526241/

5.
OMAP4: DSS2: Adding fclk support for DPI interface
https://patchwork.kernel.org/patch/529381/

6.
OMAP: DSS2: Adding dss_features for independent core clk divider
https://patchwork.kernel.org/patch/529561/

I'll send a pull request for the linaro 2.6.37 tree in a while

Merge branch 'display-patches-for-linaro-37' of git://dev.omapzoom.org/pub/scm/anand/linux-omap-usb into linaro-2.6.37