| Message ID | 20180423134750.30403-8-rui.silva@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Apr 23, 2018 at 02:47:42PM +0100, Rui Miguel Silva wrote: > To support camera in i.MX7 the cma heap is used to allocate frame buffers. The > default size of CMA is 16MB which is not enough for higher resolutions (ex: > 1600x1200). > > So, increase the default CMA size to 40MB. > > Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> CMA size can be adjusted by kernel cmdline. I'm not sure it's necessary to make it fixed in DT. Shawn > --- > arch/arm/boot/dts/imx7s.dtsi | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi > index 4d42335c0dee..142ea709d296 100644 > --- a/arch/arm/boot/dts/imx7s.dtsi > +++ b/arch/arm/boot/dts/imx7s.dtsi > @@ -182,6 +182,20 @@ > <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>; > }; > > + reserved-memory { > + #address-cells = <1>; > + #size-cells = <1>; > + ranges; > + > + /* global autoconfigured region for contiguous allocations */ > + linux,cma { > + compatible = "shared-dma-pool"; > + reusable; > + size = <0x2800000>; > + linux,cma-default; > + }; > + }; > + > soc { > #address-cells = <1>; > #size-cells = <1>; > -- > 2.17.0 >
diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi index 4d42335c0dee..142ea709d296 100644 --- a/arch/arm/boot/dts/imx7s.dtsi +++ b/arch/arm/boot/dts/imx7s.dtsi @@ -182,6 +182,20 @@ <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>; }; + reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + ranges; + + /* global autoconfigured region for contiguous allocations */ + linux,cma { + compatible = "shared-dma-pool"; + reusable; + size = <0x2800000>; + linux,cma-default; + }; + }; + soc { #address-cells = <1>; #size-cells = <1>;
To support camera in i.MX7 the cma heap is used to allocate frame buffers. The default size of CMA is 16MB which is not enough for higher resolutions (ex: 1600x1200). So, increase the default CMA size to 40MB. Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> --- arch/arm/boot/dts/imx7s.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+)