On Tue, Mar 11, 2014 at 12:42:08PM +0100, Philipp Zabel wrote:
> Hi Shawn,
>
> Am Dienstag, den 11.03.2014, 11:46 +0800 schrieb Shawn Guo:
> > On Wed, Mar 05, 2014 at 10:20:51AM +0100, Philipp Zabel wrote:
> > > Hi,
> > >
> > > this latest version of the imx-drm DT binding patches applies
> > > on top of staging-next and also depends on the OF graph binding
> > > patchset that moves the v4l2_of helpers to drivers/of.
> > > Currently, the two patchsets are also available at:
> > > git://git.pengutronix.de/git/pza/linux.git topic/of-graph
> > > git://git.pengutronix.de/git/pza/linux.git topic/imx-drm-dt
> >
> > Hi Philipp,
> >
> > I just came across a couple problems when testing the series on
> > my imx6dl-sabresd board in dual display case - HDMI + LVDS. I tested it
> > using Russell's branch below, which I believe has all the pieces put
> > together.
> >
> > git://ftp.arm.linux.org.uk/~rmk/linux-arm.git imx-drm-staging
> >
> > - When I enable HDMI and LVDS support in both kernel build and device
> > tree, HDMI seems working fine but LVDS color is corrupted quite badly.
> >
> > - When I enable HDMI and LVDS support in kernel build but only LVDS in
> > device tree (keep HDMI disabled in device tree by not changing
> > 'status' of HDMI node to 'okay'), LVDS does not even work. In this
> > case, it seems that the binding of display-subsystem does not succeed.
>
> Can you check if you get the bound messages from
> drivers/base/component.c:
>
> imx-drm display-subsystem.11: bound imx-ipuv3-crtc.0 (ops ipu_crtc_ops)
> imx-drm display-subsystem.11: bound imx-ipuv3-crtc.1 (ops ipu_crtc_ops)
> imx-drm display-subsystem.11: bound ldb.10 (ops imx_ldb_ops)
>
> I have tried this branch with a Phytec phyFLEX i.MX6S on PBAB01
> baseboard with EDT 800x480 LVDS panel, and it seems to work.
> The check in drivers/staging/imx-drm/imx-drm-core.c:675 should make sure
> that unavailable (status="disabled") devices are just skipped.
Sorry, Philipp. The setup in my report is incorrect. The correct setup
to see this issue consists of:
1) build a kernel without HDMI support, i.e. !CONFIG_DRM_IMX_HDMI
2) enable HDMI device in DT, i.e. adding the lines below in board dts.
&hdmi {
status = "okay";
};
Sorry for the confusion.
Shawn
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