Messages in this thread | | | Subject | Re: [PATCH v1 2/3] ARM: dts: stm32: enable Vivante GPU support on stm32mp157c-ed1 board | From | Lucas Stach <> | Date | Fri, 15 Feb 2019 17:14:29 +0100 |
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Am Freitag, den 15.02.2019, 16:58 +0100 schrieb Pierre-Yves MORDRET: > Enable Vivante GPU driver for stm32mp157c-ed1 board. > > Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> > --- > arch/arm/boot/dts/stm32mp157c-ed1.dts | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts > b/arch/arm/boot/dts/stm32mp157c-ed1.dts > index 98ef7a0..792f402 100644 > --- a/arch/arm/boot/dts/stm32mp157c-ed1.dts > +++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts > @@ -20,6 +20,17 @@ > reg = <0xC0000000 0x40000000>; > }; > > + reserved-memory { > + #address-cells = <1>; > + #size-cells = <1>; > + ranges; > + > + gpu_reserved: gpu@f8000000 { > + reg = <0xf8000000 0x8000000>; > + no-map; > + }; > + }; > +
I don't think you need this. The GPU driver uses very little contig dma memory. Most of the GPU memory is ordinary paged memory, so setting aside a private memory region of this size is a waste of memory. Most likely you can just allow the GPU driver to use the system global CMA region.
Regards, Lucas
> aliases { > serial0 = &uart4; > }; > @@ -53,6 +64,11 @@ > status = "okay"; > }; > > +&gpu { > + contiguous-area = <&gpu_reserved>; > + status = "okay"; > +}; > + > &i2c4 { > pinctrl-names = "default"; > pinctrl-0 = <&i2c4_pins_a>;
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