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August 2024, 09:49:36 CEST schrieb Alexander Stein: > Am Dienstag, 27. August 2024, 16:24:58 CEST schrieb Alexander Stein: > > Default CMA size is too small for HDMI output and VPU usage. Increase t= he > > default size by providing a CMA memory area. > >=20 > > Signed-off-by: Alexander Stein > > --- > > Smallest RAM variant has 512MiB. > >=20 > > arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi | 14 ++++++++++++++ > > 1 file changed, 14 insertions(+) > >=20 > > diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi b/arch/arm/boo= t/dts/nxp/imx/imx6qdl-mba6.dtsi > > index d03f7065ddfd7..8ba3ec27bee07 100644 > > --- a/arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi > > +++ b/arch/arm/boot/dts/nxp/imx/imx6qdl-mba6.dtsi > > @@ -106,6 +106,20 @@ reg_vcc3v3_audio: regulator-vcc3v3-audio { > > vin-supply =3D <®_mba6_3p3v>; > > }; > > =20 > > + reserved-memory { > > + #address-cells =3D <1>; > > + #size-cells =3D <1>; > > + ranges; > > + > > + linux,cma { > > + compatible =3D "shared-dma-pool"; > > + reusable; > > + size =3D <0x14000000>; > > + alloc-ranges =3D <0x10000000 0x20000000>; > > + linux,cma-default; > > + }; > > + }; > > + >=20 > Please do not merge yet. > I just noticed that this breaks mmap'ed fbdev usage. It only works when C= MA > area is in HighMem. Okay, now that commit 5a498d4d06d6d ("drm/fbdev-dma: Only install deferred I/O if necessary") has been applied, the mentioned problem is gone. This patch can be applied if there are no concerns. Best regards, Alexander =2D-=20 TQ-Systems GmbH | M=FChlstra=DFe 2, Gut Delling | 82229 Seefeld, Germany Amtsgericht M=FCnchen, HRB 105018 Gesch=E4ftsf=FChrer: Detlef Schneider, R=FCdiger Stahl, Stefan Schneider http://www.tq-group.com/