[PATCH] ARM: dts: imx6qdl-sabresd: Allow HDMI and LVDS to work simultaneously

Philipp Zabel p.zabel at pengutronix.de
Wed Jun 24 02:21:34 PDT 2015

Hi Fabio,

Am Dienstag, den 23.06.2015, 13:32 -0300 schrieb Fabio Estevam:
> Hi Phillip,
> On Tue, Jun 23, 2015 at 1:23 PM, Philipp Zabel <p.zabel at pengutronix.de> wrote:
> > Please remember that on i.MX6QDL in general we can't change the LDB
> > clock parent without risking a breakdown in the divider:
> >
> > http://lists.infradead.org/pipermail/linux-arm-kernel/2015-January/313618.html
> > http://lists.infradead.org/pipermail/linux-arm-kernel/2015-January/313619.html
> > http://lists.infradead.org/pipermail/linux-arm-kernel/2015-January/313620.html
> Yes, I am aware of this issue.
> However this patch does not make things worse with this respect.
> Instead of changing the LDB parent to PLL5 this patch changes to PLL3
> instead.

If we later make the ldb_di_sel muxes read-only (patch 2 above), this
change will not work anymore. If my (version of your initial) patch 3
gets accepted, the assigned-clock-parents property will keep working for
ldb_di_sel only if it is placed in the clks device tree node.

> > Has there been an erratum for this issue yet?
> I was told we should see it online within a few weeks. Hopefully we
> would be able to revisit your patch series after this happens.

Good news, thank you.


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