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ARM: dts: stm32: enable DCMI DMA-MDMA chaining on stm32mp157c-ev1.dts

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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>
Link: https://lore.kernel.org/r/20260106-stm32-dcmi-dma-chaining-v2-12-70688bccd80a@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
This commit is contained in:
Alain Volmat 2026-01-06 12:34:40 +01:00 committed by Alexandre Torgue
parent eea9018b64
commit bb3fa3f8a4
1 changed files with 15 additions and 0 deletions
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15
arch/arm/boot/dts/st/stm32mp157c-ev1.dts
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@ -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 {
@ -302,6 +310,13 @@ &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;