Hi,
On 18/12/2020 10:11, Marek Szyprowski wrote:
Hi Neil,
On 18.12.2020 09:36, Neil Armstrong wrote:
On 17/12/2020 10:06, Marek Szyprowski wrote:
For the proper reboot Odroid C4 board requires to switch TFLASH_VDD_EN pin to the input (high impedance?) mode, otherwise the board is stuck in the middle of loading early stages of the bootloader from SD card.
Did you try taking the regulator-tflash_vdd and doing a disable/enable sequence to reset the card ?
The GPIOAO_3 has a default pull-up, so I don't see why moving it to input could change anything.
So maybe simply doing a 0->1 transition could do the same, using the regulator would be much better.
Can't we add "shutdown" or equivalent method to the mmc driver that could do this directly with the vdd regulator ?
Yes, I've tried all combinations of playing this that GPIO and regulator that came to my mind. Switching pin to the input is the only one I've found working.
Thanks for the dumps !
Could you try switching the tflash_vdd to opendrain like :
--->8---
--- a/arch/arm/dts/meson-sm1-odroid-c4.dts +++ b/arch/arm/dts/meson-sm1-odroid-c4.dts @@ -52,7 +52,7 @@ regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>;
- gpio = <&gpio_ao GPIOAO_3 GPIO_ACTIVE_HIGH>; + gpio = <&gpio_ao GPIOAO_3 GPIO_OPEN_DRAIN>; enable-active-high; regulator-always-on; };
--->8---
This should leave the pin in input to achieve high state, and solve the issue.
Neil
It looks that there must be some additional (hw?) logic there, which does the SD card reset during the BL, which in turn conflicts with the constant 0 or constant 1 driven from TFLASH_VDD_EN gpio. This is also what the vendor's kernel does: https://github.com/hardkernel/linux/commit/84628497332a5cd2154c92436ec86fad9... That commit states that it is according to the odroid schematic, but on the public schematics of C4 I cannot find anything what might need such workaround/fix.
Here is how it behaves without the fix:
- if SD card is not used (TFLASH regulator is not even instantiated, so
GPIO pin is in input state as its initial value left by earlier BL stages), the reboot works fine:
--->8---
U-Boot 2021.01-rc3 (Dec 18 2020 - 10:00:48 +0100) odroid-c4
Model: Hardkernel ODROID-C4 SoC: Amlogic Meson SM1 (S905X3) Revision 2b:c (10:2) DRAM: 3.8 GiB MMC: sd@ffe05000: 0, mmc@ffe07000: 1 In: serial Out: serial Err: serial Net: eth0: ethernet@ff3f0000 Hit any key to stop autoboot: 0 => => reset resetting ... bl31 reboot reason: 0xd bl31 reboot reason: 0x0 system cmd 1. SM1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:0;READ:0;0.0;CHK:0; bl2_stage_init 0x01 bl2_stage_init 0x81 hw id: 0x0000 - pwm id 0x01 bl2_stage_init 0xc1 bl2_stage_init 0x02
no sdio debug board detected L0:00000000 L1:00000703 L2:00008067 L3:15000020 S1:00000000 B2:20282000 B1:a0f83180
TE: 143230
BL2 Built : 22:54:32, Apr 28 2020. g12a ga659aac-dirty - changqing.gao@droid11
Board ID = 1 Set cpu clk to 24M Set clk81 to 24M Use GP1_pll as DSU clk. DSU clk: 1200 Mhz CPU clk: 1200 MHz Set clk81 to 166.6M DDR driver_vesion: LPDDR4_PHY_V_0_1_15 build time: Apr 28 2020 22:54:28 board id: 1 Load FIP HDR from SD, src: 0x00010200, des: 0xfffd0000, size: 0x00004000, part: 0 fw parse done Load ddrfw from SD, src: 0x00060200, des: 0xfffd0000, size: 0x0000c000, part: 0 Load ddrfw from SD, src: 0x00038200, des: 0xfffd0000, size: 0x00004000, part: 0 PIEI prepare done fastboot data load fastboot data verify verify result: 255 Cfg max: 2, cur: 1. Board id: 255. Force loop cfg DDR4 probe ddr clk to 1320MHz Load ddrfw from SD, src: 0x00014200, des: 0xfffd0000, size: 0x0000c000, part: 0
dmc_version 0001 Check phy result INFO : End of initialization INFO : End of read enable training INFO : End of fine write leveling INFO : End of read dq deskew training INFO : End of MPR read delay center optimization INFO : End of Write leveling coarse delay INFO : End of write delay center optimization INFO : End of read delay center optimization INFO : End of max read latency training INFO : Training has run successfully! 1D training succeed Load ddrfw from SD, src: 0x00020200, des: 0xfffd0000, size: 0x0000c000, part: 0 Check phy result INFO : End of initialization INFO : End of 2D read delay Voltage center optimization INFO : End of 2D write delay Voltage center optimization INFO : Training has run successfully!
R0_RxClkDly_Margin==94 ps 8 R0_TxDqDly_Margi==106 ps 9
R1_RxClkDly_Margin==0 ps 0 R1_TxDqDly_Margi==0 ps 0
dwc_ddrphy_apb_wr((0<<20)|(2<<16)|(0<<12)|(0xb0):0001
soc_vref_reg_value 0x 0000004e 0000004f 0000004e 0000004f 00000050 0000004f 0000004f 0000004e 0000004d 0000004c 0000004f 0000004d 00000050 00000050 0000004f 0000004f 0000004e 0000004f 0000004e 0000004e 0000004e 0000004d 0000004e 0000004e 00000050 0000004e 0000004f 0000004d 0000004d 0000004e 0000004e 0000004d dram_vref_reg_value 0x 00000022 2D training succeed aml_ddr_fw_vesion: LPDDR4_PHY_V_0_1_15 build time: Jun 18 2019 20:29:43 auto size-- 65535DDR cs0 size: 2048MB DDR cs1 size: 2048MB DMC_DDR_CTRL: 00700024DDR size: 3928MB cs0 DataBus test pass cs1 DataBus test pass cs0 AddrBus test pass cs1 AddrBus test pass
non-sec scramble use zero key ddr scramble enabled
100bdlr_step_size ps== 425 result report boot times 1Enable ddr reg access Load FIP HDR from SD, src: 0x00010200, des: 0x01700000, size: 0x00004000, part: 0 Load BL3X from SD, src: 0x0006c200, des: 0x0175c000, size: 0x00098000, part: 0 0.0;M3 CHK:0;cm4_sp_mode 0 MVN_1=0x00000000 MVN_2=0x00000000 [Image: g12a_v1.1.3386-3b31431 2019-05-21 10:41:54 luan.yuan@droid15-sz] OPS=0x10 ring efuse init 2b 0c 10 00 01 15 06 00 00 11 36 30 43 57 50 50 [1.016710 Inits done] secure task start! high task start! low task start! run into bl31 NOTICE: BL31: v1.3(release):4fc40b1 NOTICE: BL31: Built : 15:57:33, May 22 2019 NOTICE: BL31: G12A normal boot! NOTICE: BL31: BL33 decompress pass ERROR: Error initializing runtime service opteed_fast
U-Boot 2021.01-rc3 (Dec 18 2020 - 10:00:48 +0100) odroid-c4
--->8---
- If SD card is touched, then reboot hangs somewhere between BL2->BL3
stages:
--->8---
U-Boot 2021.01-rc3 (Dec 18 2020 - 10:00:48 +0100) odroid-c4
Model: Hardkernel ODROID-C4 SoC: Amlogic Meson SM1 (S905X3) Revision 2b:c (10:2) DRAM: 3.8 GiB MMC: sd@ffe05000: 0, mmc@ffe07000: 1 In: serial Out: serial Err: serial Net: eth0: ethernet@ff3f0000 Hit any key to stop autoboot: 0 => => mmc info Device: sd@ffe05000 Manufacturer ID: 74 OEM: 4a45 Name: SDU1 Bus Speed: 50000000 Mode: SD High Speed (50MHz) Rd Block Len: 512 SD version 3.0 High Capacity: Yes Capacity: 7.5 GiB Bus Width: 4-bit Erase Group Size: 512 Bytes => reset resetting ... bl31 reboot reason: 0xd bl31 reboot reason: 0x0 system cmd 1. SM1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:0;READ:0;0.0;CHK:0; bl2_stage_init 0x01 bl2_stage_init 0x81 hw id: 0x0000 - pwm id 0x01 bl2_stage_init 0xc1 bl2_stage_init 0x02
no sdio debug board detected L0:00000000 L1:00000703 L2:00008067 L3:15000020 S1:00000000 B2:20282000 B1:a0f83180
TE: 145782
BL2 Built : 22:54:32, Apr 28 2020. g12a ga659aac-dirty - changqing.gao@droid11
Board ID = 1 Set cpu clk to 24M Set clk81 to 24M Use GP1_pll as DSU clk. DSU clk: 1200 Mhz CPU clk: 1200 MHz Set clk81 to 166.6M DDR driver_vesion: LPDDR4_PHY_V_0_1_15 build time: Apr 28 2020 22:54:28 board id: 1 Load FIP HDR from SD, src: 0x00010200, des: 0xfffd0000, size: 0x00004000, part: 0 FIP HDR CHK: 0x00000089 ADDR 0xfffd0000 reset... SM1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:1;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:2;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:3;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:4;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:5;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:6;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:7;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:8;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:9;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:A;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:B;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:C;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:D;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:E;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:F;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:10;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;LOOP:11;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;
--->8---
@tobetter, could you provide us a summary of how to fix the reboot issues on the N2, N2+, C4 and HC4 ?
On the other hand I didn't observe any reboot related issues on N2/N2+.
Best regards