Sorry, forgot disable ipu1:
diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
index b352ea2..b884490 100644
--- a/arch/arm/boot/dts/imx6qdl.dtsi
+++ b/arch/arm/boot/dts/imx6qdl.dtsi
@@ -1291,7 +1291,7 @@
<&clks IMX6QDL_CLK_IPU1_DI1>;
clock-names = "bus", "di0", "di1";
resets = <&src 2>;
-
+ status = "disabled";
ipu1_csi0: port@0 {
reg = <0>;
> -----Original Message-----
> From: Robin Gong
> Sent: 2019年6月11日 17:10
> To: 'Sven Van Asbroeck' <thesven73@xxxxxxxxx>
> Cc: Fabio Estevam <festevam@xxxxxxxxx>; linux-media
> <linux-media@xxxxxxxxxxxxxxx>
> Subject: RE: [v8] media: imx: add mem2mem device
>
> > -----Original Message-----
> > From: Sven Van Asbroeck <thesven73@xxxxxxxxx>
> > Sent: 2019年6月10日 23:47
> > To: Robin Gong <yibin.gong@xxxxxxx>
> > Subject: Re: [v8] media: imx: add mem2mem device On Mon, Jun 10, 2019
> > at 5:09 AM Robin Gong <yibin.gong@xxxxxxx> wrote:
> > >
> > > I can reproduce once enable your config to build firmware in kernel,
> > > but no such issue if load sdma firmware from rootfs as
> > > imx_v6_v7_defconfig. Maybe firmware built in function broken by some
> > > patches. Could you try with the default firmware loading way which
> > > is from
> > rootfs(/lib/firmware/imx/sdma/sdma-imx6q.bin)?
> >
> > This is it ! If I add the firmware to the kernel directly, I see the crash.
> > But if I use the firmware fall-back mechanism, there is no crash.
> > And if I build imx-sdma as a module, and insmod it later, there is also no
> crash.
> >
> > I patched imx-sdma so it logs the adler32 checksum of the firmware
> > it's loading (I tried using the kernel crypto API, but it doesn't work
> > this early in the boot). I notice that the firmware is always the
> > same, crash or no
> > crash:
> >
> > firmware in-kernel (crash):
> > [ 1.370424] imx-sdma 20ec000.sdma: firmware hash: 69BC0F09
> > firmware fallback (no crash):
> > [ 6.466394] imx-sdma 20ec000.sdma: firmware hash: 69BC0F09
> >
> > My guess: this could be a timing issue. If the sdma driver loads 'too
> > early', the boot crash will happen. Maybe the driver needs to check
> > for a missing dependency on boot, and -EPROBE_DEFER ?
> >
> > Robin, should I make a bug report? If so, who do I send this to?
> >
> Sven, no any dependency from sdma driver view. The only difference between
> directly loading firmware from kernel and rootfs is the former spend more time
> during kernel boot and such timing may cause the crash. The issue is not 100%
> in my side, about 20% possibility, which looks like 'timing issue' . Another
> interesting thing is that every time the crash stop at somewhere drm, and After
> I disable ipu and display which use drm in i.mx6q.dtsi, the issue is gone on my
> i.mx6q-sabreauto board.
> Could you have a try with below patch as mine? If the issue is gone on your
> side, we could involve drm guys to look into it.
>
> diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
> index 7175898..5b21b3f 100644
> --- a/arch/arm/boot/dts/imx6q.dtsi
> +++ b/arch/arm/boot/dts/imx6q.dtsi
> @@ -217,6 +217,7 @@
> <&clks IMX6QDL_CLK_IPU2_DI1>;
> clock-names = "bus", "di0", "di1";
> resets = <&src 4>;
> + status = "disabled";
>
> ipu2_csi0: port@0 {
> reg = <0>; @@ -300,6 +301,7 @@
> display-subsystem {
> compatible = "fsl,imx-display-subsystem";
> ports = <&ipu1_di0>, <&ipu1_di1>, <&ipu2_di0>,
> <&ipu2_di1>;
> + status = "disabled";
> };
> };
