N950 boot/DRM issues with v4.16
diff mbox

Message ID 20180417220405.53zt5aut2uf6ijhi@darkstar.musicnaut.iki.fi
State New
Headers show

Commit Message

Aaro Koskinen April 17, 2018, 10:04 p.m. UTC
Hi,

On Wed, Apr 18, 2018 at 12:20:43AM +0300, Aaro Koskinen wrote:
> When moving from 4.15 -> 4.16, I see long delays and spam from DRM in dmesg.
> 
> Is this some known issue, or should I try to e.g. bisect it? FWIW, the same
> kernel binary works on N900.

Apparently N950 display support got enabled in the DTS before it was actually
working. I did the following and the boot is as before:


(Having in enabled in DTS will break my testing, as I want to use the
same kernel binary/configuration also for N900/N950/N9).

A.
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Comments

Tony Lindgren April 18, 2018, 3:44 a.m. UTC | #1
* Aaro Koskinen <aaro.koskinen@iki.fi> [180417 22:05]:
> Hi,
> 
> On Wed, Apr 18, 2018 at 12:20:43AM +0300, Aaro Koskinen wrote:
> > When moving from 4.15 -> 4.16, I see long delays and spam from DRM in dmesg.
> > 
> > Is this some known issue, or should I try to e.g. bisect it? FWIW, the same
> > kernel binary works on N900.
> 
> Apparently N950 display support got enabled in the DTS before it was actually
> working. I did the following and the boot is as before:
> 
> diff --git a/arch/arm/boot/dts/omap3-n950.dts b/arch/arm/boot/dts/omap3-n950.dts
> index 2354e09343f3..aa757482d572 100644
> --- a/arch/arm/boot/dts/omap3-n950.dts
> +++ b/arch/arm/boot/dts/omap3-n950.dts
> @@ -231,6 +231,7 @@
>  	lcd0: display {
>  		compatible = "nokia,himalaya", "panel-dsi-cm";
>  		label = "lcd0";
> +		status = "disabled";
>  
>  		pinctrl-names = "default";
>  		pinctrl-0 = <&display_pins>;
> 
> (Having in enabled in DTS will break my testing, as I want to use the
> same kernel binary/configuration also for N900/N950/N9).

Can you please reply with your Signed-off-by and I'll queue it
as a fix. I don't think there's any other fix until at least
the frame done interrupts are properly handled.

Regards,

Tony
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Sebastian Reichel April 18, 2018, 10:06 a.m. UTC | #2
Hi,

On Tue, Apr 17, 2018 at 08:44:03PM -0700, Tony Lindgren wrote:
> * Aaro Koskinen <aaro.koskinen@iki.fi> [180417 22:05]:
> > Hi,
> > 
> > On Wed, Apr 18, 2018 at 12:20:43AM +0300, Aaro Koskinen wrote:
> > > When moving from 4.15 -> 4.16, I see long delays and spam from DRM in dmesg.
> > > 
> > > Is this some known issue, or should I try to e.g. bisect it? FWIW, the same
> > > kernel binary works on N900.
> > 
> > Apparently N950 display support got enabled in the DTS before it was actually
> > working. I did the following and the boot is as before:
> > 
> > diff --git a/arch/arm/boot/dts/omap3-n950.dts b/arch/arm/boot/dts/omap3-n950.dts
> > index 2354e09343f3..aa757482d572 100644
> > --- a/arch/arm/boot/dts/omap3-n950.dts
> > +++ b/arch/arm/boot/dts/omap3-n950.dts
> > @@ -231,6 +231,7 @@
> >  	lcd0: display {
> >  		compatible = "nokia,himalaya", "panel-dsi-cm";
> >  		label = "lcd0";
> > +		status = "disabled";
> >  
> >  		pinctrl-names = "default";
> >  		pinctrl-0 = <&display_pins>;
> > 
> > (Having in enabled in DTS will break my testing, as I want to use the
> > same kernel binary/configuration also for N900/N950/N9).
> 
> Can you please reply with your Signed-off-by and I'll queue it
> as a fix. I don't think there's any other fix until at least
> the frame done interrupts are properly handled.

FWIW:

Acked-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

-- Sebastian

Patch
diff mbox

diff --git a/arch/arm/boot/dts/omap3-n950.dts b/arch/arm/boot/dts/omap3-n950.dts
index 2354e09343f3..aa757482d572 100644
--- a/arch/arm/boot/dts/omap3-n950.dts
+++ b/arch/arm/boot/dts/omap3-n950.dts
@@ -231,6 +231,7 @@ 
 	lcd0: display {
 		compatible = "nokia,himalaya", "panel-dsi-cm";
 		label = "lcd0";
+		status = "disabled";
 
 		pinctrl-names = "default";
 		pinctrl-0 = <&display_pins>;