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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: Barebox List <barebox@lists.infradead.org>,
	Raphael Poggi <poggi.raph@gmail.com>,
	pza@pengutronix.de
Subject: Re: [PATCH v2 1/5] clk: imx6: remove quirky clk_set_parent(LDB_diN_sel, pll5_video_div)
Date: Mon, 27 May 2019 00:25:35 -0700	[thread overview]
Message-ID: <CAHQ1cqHJaWPeXQGjyLqVHx-WX8WUi_iRCeDj0fTzmXct4SUiPA@mail.gmail.com> (raw)
In-Reply-To: <CAHQ1cqG6WGAbQUr3NXOE0N+kJeJsGUZeweb4T5y0PcZg0hEOOg@mail.gmail.com>

On Sun, May 26, 2019 at 11:50 PM Andrey Smirnov
<andrew.smirnov@gmail.com> wrote:
>
> On Sun, May 26, 2019 at 11:29 PM Ahmad Fatoum <a.fatoum@pengutronix.de> wrote:
> >
> > Hello Andrey,
> >
> > On 26/5/19 23:55, Andrey Smirnov wrote:
> > > On Tue, May 21, 2019 at 8:56 AM Ahmad Fatoum <a.fatoum@pengutronix.de> wrote:
> > >>
> > > This particular patch does break a non 6Q+ version of RDU2,  but the
> > > follow up ones in the series fix it, so it seems that no action is
> > > really necessary on my part.
> >
> > The reparenting removed in this patch isn't reinstated by the rest of the series.
> > They merely apply parentage expressed in the device tree in a glitch-free manner.
> >
> > As both barebox and kernel imx6qdl-zii-rdu2.dtsi lack the relevant
> > assigned-clock-parents snippet, I am not sure what it is this patch broke that the
> > follow-up ones fixed?
>
> Not sure, will investigate.
>

Ah, I see, so with re-parenting to PLL5 removed ldb_* clocks default
to MMDC_CH1 and for that to work "clk: imx6: Mask mmdc_ch1 handshake
for periph2_sel and mmdc_ch1_axi_podf" is needed. After that commit
MMDC_CH1 seems to work well enough for frame buffer to come up and
function.

Thanks,
Andrey Smirnov

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  parent reply	other threads:[~2019-05-27  7:25 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-21 15:56 [PATCH v2 0/5] clk: imx6: work around LDB hang caused by ERR009219 Ahmad Fatoum
2019-05-21 15:56 ` [PATCH v2 1/5] clk: imx6: remove quirky clk_set_parent(LDB_diN_sel, pll5_video_div) Ahmad Fatoum
2019-05-23 10:01   ` Philipp Zabel
2019-05-23 10:28     ` Ahmad Fatoum
2019-05-26 21:55   ` Andrey Smirnov
2019-05-27  6:29     ` Ahmad Fatoum
2019-05-27  6:50       ` Andrey Smirnov
2019-05-27  7:23         ` Ahmad Fatoum
2019-05-27  7:28           ` Andrey Smirnov
2019-05-27  7:49             ` Ahmad Fatoum
2019-05-27  8:02               ` Andrey Smirnov
2019-05-27  9:19                 ` Ahmad Fatoum
2019-05-27  7:25         ` Andrey Smirnov [this message]
2019-05-27  7:39           ` Ahmad Fatoum
2019-05-21 15:56 ` [PATCH v2 2/5] clk: imx6: Make the LDB_DI0 and LDB_DI1 clocks read-only Ahmad Fatoum
2019-05-23 10:01   ` Philipp Zabel
2019-05-27  7:01   ` Andrey Smirnov
2019-05-27  7:38     ` Ahmad Fatoum
2019-05-21 15:56 ` [PATCH v2 3/5] clk: imx6: Mask mmdc_ch1 handshake for periph2_sel and mmdc_ch1_axi_podf Ahmad Fatoum
2019-05-23 10:01   ` Philipp Zabel
2019-05-21 15:56 ` [PATCH v2 4/5] clk: imx6: Fix procedure to switch the parent of LDB_DI_CLK Ahmad Fatoum
2019-05-23 10:03   ` Philipp Zabel
2019-05-26 21:58   ` Andrey Smirnov
2019-05-27  7:04   ` Andrey Smirnov
2019-05-21 15:56 ` [PATCH v2 5/5] clk: imx6: define an enum for ldb mux inputs Ahmad Fatoum
2019-05-23 10:03   ` Philipp Zabel
2019-05-23 10:35     ` Ahmad Fatoum
2019-05-26 21:59 ` [PATCH v2 0/5] clk: imx6: work around LDB hang caused by ERR009219 Andrey Smirnov

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