IMX6UL Linux/OPTEE Increasing RAM

nicholash — Thu, 28 Nov 2019 00:28:49 GMT

Hi,

I'm trying to get my board to recognise all my RAM, I had it recognising 128MB but I have 1GB installed. I have used the DDR configuration tool to configure uboot to configure the memory registers and it recognises the full amount of RAM. I can load an image onto the board using UUU, but on a restart I get the message "Starting kernel ..." from uBoot, then a few messages from OP-TEE starting, then the whole system hangs. From booting without my mods, I'd expect to get "Booting Linux on physical CPU 0x0". I have also CFG_DDR_SIZE in OP-TEE to 0x40000000.

What else do I need to configure?

Here is my memory configuration in uboot:

//=============================================================================
// Calibration setup.
//=============================================================================
DATA 4 0x021b0800 0xA1390003 // DDR_PHY_P0_MPZQHWCTRL, enable both one-time & periodic HW ZQ calibration.

// For target board, may need to run write leveling calibration to fine tune these settings.
DATA 4 0x021b080c 0x000E0000

//Read DQS Gating calibration
DATA 4 0x021b083c 0x01480150 // MPDGCTRL0 PHY0
DATA 4 0x021b0840 0x00000000 // MPDGCTRL1 PHY0

//Read calibration
DATA 4 0x021b0848 0x40404E50 // MPRDDLCTL PHY0

//Write calibration
DATA 4 0x021b0850 0x40405048 // MPWRDLCTL PHY0

//read data bit delay: (3 is the reccommended default value, although out of reset value is 0)
DATA 4 0x021b081c 0x33333333 // MMDC_MPRDDQBY0DL
DATA 4 0x021b0820 0x33333333 // MMDC_MPRDDQBY1DL

//write data bit delay:
DATA 4 0x021b082c 0xF3333333 // MMDC_MPWRDQBY0DL
DATA 4 0x021b0830 0xF3333333 // MMDC_MPWRDQBY1DL

//DQS&CLK Duty Cycle
DATA 4 0x021b08c0 0x00921012 // [MMDC_MPDCCR] MMDC Duty Cycle Control Register

// Complete calibration by forced measurement:
DATA 4 0x021b08b8 0x00000800 // DDR_PHY_P0_MPMUR0, frc_msr
//=============================================================================
// Calibration setup end
//=============================================================================

//MMDC init:
DATA 4 0x021b0004 0x0002002D // MMDC0_MDPDC
DATA 4 0x021b0008 0x1B333030 // MMDC0_MDOTC
DATA 4 0x021b000c 0x8B8F5333 // MMDC0_MDCFG0
DATA 4 0x021b0010 0xB68E0B63 // MMDC0_MDCFG1
DATA 4 0x021b0014 0x01FF00DB // MMDC0_MDCFG2

//MDMISC: RALAT kept to the high level of 5.
//MDMISC: consider reducing RALAT if your 528MHz board design allow that. Lower RALAT benefits:
//a. better operation at low frequency, for LPDDR2 freq < 100MHz, change RALAT to 3
//b. Small performence improvment
DATA 4 0x021b0018 0x00211740 // MMDC0_MDMISC
DATA 4 0x021b001c 0x00008000 // MMDC0_MDSCR, set the Configuration request bit during MMDC set up
DATA 4 0x021b002c 0x000026D2 // MMDC0_MDRWD
DATA 4 0x021b0030 0x008F1023 // MMDC0_MDOR
DATA 4 0x021b0040 0x0000005F // Chan0 CS0_END
DATA 4 0x021b0000 0x85180000 // MMDC0_MDCTL

DATA 4 0x021b0890 0x00400a38 // MPPDCMPR2

//Mode register writes
DATA 4 0x021b001c 0x02008032 // MMDC0_MDSCR, MR2 write, CS0
DATA 4 0x021b001c 0x00008033 // MMDC0_MDSCR, MR3 write, CS0
DATA 4 0x021b001c 0x00048031 // MMDC0_MDSCR, MR1 write, CS0
DATA 4 0x021b001c 0x15208030 // MMDC0_MDSCR, MR0write, CS0
DATA 4 0x021b001c 0x04008040 // MMDC0_MDSCR, ZQ calibration command sent to device on CS0

DATA 4 0x021b0020 0x00007800 // MMDC0_MDREF

DATA 4 0x021b0818 0x00000227 // DDR_PHY_P0_MPODTCTRL

DATA 4 0x021b0004 0x0002556D // MMDC0_MDPDC now SDCTL power down enabled

DATA 4 0x021b0404 0x00011006 // MMDC0_MAPSR ADOPT power down enabled, MMDC will enter automatically to self-refresh while the number of idle cycle reached.

DATA 4 0x021b001c 0x00000000 // MMDC0_MDSCR, clear this register (especially the configuration bit as initialization is complete)

Re: IMX6UL Linux/OPTEE Increasing RAM

igorpadykov — Thu, 28 Nov 2019 09:07:49 GMT

Hi Nick

one can try to boot without optee, in particular memory size can be adjusted

in uboot with #define PHYS_SDRAM_SIZE

mx6ul_14x14_evk.h\configs\include - uboot-imx - i.MX U-Boot

Best regards
igor
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Re: IMX6UL Linux/OPTEE Increasing RAM

nicholash — Thu, 28 Nov 2019 22:39:53 GMT

Hi Igor,

I have set PHYS_SDRAM_SIZE to SZ_1G with no luck, I have the exact same problem.

I believe it does boot with if I disable OP-TEE, I need to use OP-TEE for my application though.

Re: IMX6UL Linux/OPTEE Increasing RAM

igorpadykov — Fri, 29 Nov 2019 00:44:40 GMT

Hi Nick

also one can look at similar issue on

Hikey 620: increase TA RAM in OP-TEE · Issue #2313 · OP-TEE/optee_os · GitHub

Best regards
igor

Re: IMX6UL Linux/OPTEE Increasing RAM

nicholash — Fri, 29 Nov 2019 04:59:48 GMT

Hi Igor,

I have solved this issue by pulling the latest version of imx-optee-os.

Evidently, this was solved in the last few months.

Thanks for your help.

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IMX6UL Linux/OPTEE Increasing RAM

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Re: IMX6UL Linux/OPTEE Increasing RAM

Re: IMX6UL Linux/OPTEE Increasing RAM