mx6qsabresd hangs on linux-next

[Shawn Guo]

On Mon, May 05, 2014 at 07:50:24PM -0300, Fabio Estevam wrote:
> Hi,
> 
> I am running linux-next 20140505 on a mx6qsabresd and I am getting the
> following hang after ldb is bound:
> 
> imx-ipuv3 2400000.ipu: IPUv3H probed
> imx-ipuv3 2800000.ipu: IPUv3H probed
> [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
> [drm] No driver support for vblank timestamp query.
> 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)
> mmc1: new SDHC card at address e7ac
> mmcblk0: mmc1:e7ac SD04G 3.69 GiB
> imx-drm display-subsystem.11: bound imx-ipuv3-crtc.2 (ops ipu_crtc_ops)
>  mmcblk0: unknown partition table
> imx-drm display-subsystem.11: bound imx-ipuv3-crtc.3 (ops ipu_crtc_ops)
> imx-hdmi 120000.hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1
> imx-drm display-subsystem.11: bound 120000.hdmi (ops hdmi_ops)
> imx-drm display-subsystem.11: bound ldb.10 (ops imx_ldb_ops)
> 
> (... system hangs)

I'm seeing the same issue here.  It seems to be caused by some clk
divider code change.  I'm looking into it further.

Shawn