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Custom CMA reserved memory on i.MX8MM mini

Question asked by matt67 on Feb 5, 2020
Latest reply on Feb 5, 2020 by matt67

Hi there,

 

I have a custom design with 1GB of RAM on i.MX8MM however the dtsi file is setting the shared-dma-pool with a quiet huge size.

 

          /* global autoconfigured region for contiguous allocations */
          linux,cma {
               compatible = "shared-dma-pool";
               reusable;
               size = <0 0x28000000>;
               alloc-ranges = <0 0x40000000 0 0x60000000>;
               linux,cma-default;
          };

 

I don't have video processing, how could I decrease it to its minimal value in a good way and with which values ?

 

Thank you

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