2020年2月28日 · It is possible to reserve cma memory by using the CONFIG_CMA_SIZE_MBYTES in the kernel, as mentioned here: How does imx6qp increase cma memory

2023年10月2日 · How do I increase CMA memory size in imx8mp yocto BSP/device tree? I have currently 640MiB allocated and I want to increase it as can be seen here: ~# dmesg | grep -i cma

2020年3月16日 · 这个配置：linux,cma-default;，意思是到CMA memory pool中去获取。 I.MX6Q中之所以配置SIZE为256MB，是因为6Q中，有VPU、GPU、HDMI、camera等，需要较大的预留内存，并且这些内存都是需要使用DMA访问的。

2019年12月6日 · kernel中要配置CMA的大小. 1、imx_v7_defconfig和imx_v7_mfg_defconfig的CONFIG_CMA_SIZE_MBYTES=16，其中16可尝试配置为32,64,320等. 未配置CMA时log如下cma: CMA: failed to reserve 320 MiB 可能为重复. https://download.csdn.net/download/BGK112358/12015397. https://download.csdn.net/download/BGK112358/12031926

2023年1月16日 · · 一款 .NET 开源、功能强大的远程连接管理工具，支持 RDP、VNC、SSH 等多种主流协议！ imx8mp是什么时候申请CM的： imx8mp是我自己看的，imx6不一定保熟。 …

Using Alvium MIPI CSI-2 cameras requires setting up your embedded board. This document describes how to install the kernel including the camera driver module and how to prepare image acquisition.

2024年7月21日 · 《imx6ull数据手册》是一份详细的文档集，涵盖了NXP公司生产的i.MX6ULL微处理器的各种技术规格和应用指南。这份手册是工程师在设计、开发和调试基于i.MX6ULL芯片的硬件系统时的重要参考资料。下面将详细阐述其中包含...

2015年10月23日 · We have a embedded linux system (yocto 1.8) running on a i.MX6 board with 1GByte of RAM. The kernel is configured to have 320MByte of CMA reserved and no swap. Kernel 3.10.53.

2022年2月6日 · To get rid of CMA, the basic idea is to cut off the CMA way in the DMA allocation, turn to coherent pool (atomic pool). Please not that coherent pool can only be used by DMA allocation API, it's not shared to system buddy.

2019年7月4日 · Dear community, we already had a similar problem on colibri-imx6 reported here and as suggested from @stefan.tx setting the CMA to 32 in the kernel solves our problem. Now I try to do the same thing in the kernel 4.9.23.x from the BSP 2.8 but nothing changed on the run time, the CMA is always set to the default of 128MB, even if I pass the ...