On Thu, 5 Oct 2023 17:23:06 -0300 project-tvbox project-tvbox <project-tv...@prp.uespi.br> wrote:
Hi, > > How can I edit the drm parameters directly in the mainline kernel, > since the mainline dts does not have these options like the legacy > one, I saw that the dram.c drives in the legacy and mailline are > similar, for example: > [dram_para] > dram_clk = 600 > dram_type = 3 > dram_dx_odt = 0x03030303 > dram_dx_dri = 0x0e0e0e0e > dram_ca_dri = 0x1f12 > dram_odt_en = 1 > dram_para1 = 0x30fb > dram_para2 = 0x0000 > dram_mr0 = 0x840 > in the mainline kernel The kernel is not responsible for setting up the DRAM controller, this is done in U-Boot (as you apparently have already figured out). Mainline U-Boot patches a few months ago added U-Boot Kconfig options for those parameters, please check configs/x96_mate_defconfig and configs/orangepi_zero2_defconfig for examples. All options are enumerated here: https://source.denx.de/u-boot/u-boot/-/blob/master/arch/arm/mach-sunxi/Kconfig?ref_type=heads#L54-105 Cheers, Andre
