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toradex: colibri_imx6: overwrite CMA memory set in device tree

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Make sure CMA memory is not greater than 50% of available physical
memory.

Allow user to change the CMA memory via 'cma-size' U-Boot environment
variable.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
This commit is contained in:
Bhuvanchandra DV 2019-02-08 18:42:24 +01:00 committed by Stefano Babic
parent 6218d4bdce
commit bee73083a4
1 changed files with 13 additions and 1 deletions
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14
board/toradex/colibri_imx6/colibri_imx6.c
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@ -22,6 +22,7 @@
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/sata.h>
#include <asm/mach-imx/video.h>
#include <cpu.h>
#include <dm/platform_data/serial_mxc.h>
#include <environment.h>
#include <fsl_esdhc.h>
@ -688,7 +689,18 @@ int checkboard(void)
#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, bd_t *bd)
{
return ft_common_board_setup(blob, bd);
u32 cma_size;
ft_common_board_setup(blob, bd);
cma_size = getenv_ulong("cma-size", 10, 320 * 1024 * 1024);
cma_size = min((u32)(gd->ram_size >> 1), cma_size);
fdt_setprop_u32(blob,
fdt_path_offset(blob, "/reserved-memory/linux,cma"),
"size",
cma_size);
return 0;
}
#endif