Enable the DMA-MDMA chaining for the dcmi (camera capture) in order to be able to achieve higher resolution.
Signed-off-by: Alain Volmat alain.volmat@foss.st.com --- arch/arm/boot/dts/st/stm32mp157c-ev1.dts | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/arch/arm/boot/dts/st/stm32mp157c-ev1.dts b/arch/arm/boot/dts/st/stm32mp157c-ev1.dts index 8f99c30f1af1..68b536b0c6ee 100644 --- a/arch/arm/boot/dts/st/stm32mp157c-ev1.dts +++ b/arch/arm/boot/dts/st/stm32mp157c-ev1.dts @@ -86,6 +86,14 @@ &dcmi { pinctrl-names = "default", "sleep"; pinctrl-0 = <&dcmi_pins_a>; pinctrl-1 = <&dcmi_sleep_pins_a>; + /* + * Enable DMA-MDMA chaining by adding a SRAM pool and + * a MDMA channel + */ + sram = <&dcmi_pool>; + + dmas = <&dmamux1 75 0x400 0x01>, <&mdma1 0 0x3 0x1200000a 0 0>; + dma-names = "tx", "mdma_tx";
port { dcmi_0: endpoint { @@ -301,6 +309,13 @@ &spi1 { status = "disabled"; };
+&sram4 { + dcmi_pool: dcmi-sram@0 { + reg = <0x0 0x8000>; + pool; + }; +}; + &timers2 { /* spare dmas for other usage (un-delete to enable pwm capture) */ /delete-property/dmas;