Am 07.12.20 um 13:29 schrieb Neil Armstrong:
Hi,
(Please CC u-boot-amlo...@groups.io when U-Boot is concerned)
On 07/12/2020 13:19, Otto Meier wrote:
Hi Martin,
I did a lot of googling this weekend and found some interesting problems with
odroid-c2.
1. booting from emmc stop after u-boot 2020.04 (this hits me also)
Indeed, this already has been reported, but the root cause is unknown
2. usb did not work with newer kernels.
This gaves me the idea that something in the configuration of the s905 soc
is not ok.
here:
https://forum.libreelec.tv/thread/12330-balbes150-le-images-with-kodi-19-for-s9xxx/?postID=147212#post147212
and here: https://lists.denx.de/pipermail/u-boot/2020-November/thread.html
in https://groups.io/g/u-boot-amlogic/topic/77816805#661 some problems in
pinctrl related to booting from emmc is discussed.
i found that commit dd5f2351e99aad8fcbedbc1305b8b51b09952336 of u-boot
rendered the situation for odroid-c2 bad.
i gave the following patch on Top of commit
ee1e04558ff8c8ed812b986939447f129bb0b0bb of u-boot
a try ad it fixes the odroid-c2 boot issue.
--- u-boot.git/arch/arm/dts/meson-gxbb.dtsi.orig 2020-11-27
17:20:04.624193561 +0100
+++ u-boot.git/arch/arm/dts/meson-gxbb.dtsi 2020-11-27 17:23:18.472088934
+0100
@@ -403,36 +403,33 @@
gpio-ranges = <&pinctrl_periphs 0 0 119>;
};
- emmc_pins: emmc {
- mux-0 {
- groups = "emmc_nand_d07",
- "emmc_cmd";
- function = "emmc";
- bias-pull-up;
- };
- mux-1 {
- groups = "emmc_clk";
- function = "emmc";
- bias-disable;
- };
- };
+ emmc_pins: emmc {
+ mux {
+ groups = "emmc_nand_d07",
+ "emmc_cmd",
+ "emmc_clk";
+ function = "emmc";
+ };
+ };
- emmc_ds_pins: emmc-ds {
- mux {
- groups = "emmc_ds";
- function = "emmc";
- bias-pull-down;
- };
- };
+ emmc_ds_pins: emmc-ds {
+ mux {
+ groups = "emmc_ds";
+ function = "emmc";
+ };
+ };
- emmc_clk_gate_pins: emmc_clk_gate {
- mux {
- groups = "BOOT_8";
- function = "gpio_periphs";
- bias-pull-down;
- };
- };
+ emmc_clk_gate_pins: emmc_clk_gate {
+ mux {
+ groups = "BOOT_8";
+ function = "gpio_periphs";
+ };
+ cfg-pull-down {
+ pins = "BOOT_8";
+ bias-pull-down;
+ };
+ };
nor_pins: nor {
mux {
So with the latest u-boot and the kernel from
https://github.com/chewitt/linux/tree/amlogic-5.10.y
commit 725fc8df7898102f9031ba2075f763884ffa3ee8 everything is working again.
USB does hotplugging as expected.
So, this fixes USB under Linux ?? It's not clear
Neil
The above patch fixes booting from emmc for me.
Using a newer uboot then 2020.04 is mandatory for using the above mentioned
kernel.
The usb issue, i had with earlier kernels from the above mentioned tree.
Hope that clearifies it. I wanted to run the newest kernel on my system which
boots from emmc.
I think these issues are probaly independant but in my system they did
interfere.
Best regards
Otto
For me this make it work again. But i`m sorry, I don´t know what would be a
real fix.
Am 05.12.20 um 20:55 schrieb Martin Blumenstingl:
Hi Otto,
On Sat, Dec 5, 2020 at 6:40 PM Otto Meier <gf...@gmx.net> wrote:
Hi Martin,
i have tried your second notice. but it does'nt solve the issue.
if at leased on device is pluged in new devices are detected. if
all devices have been removed, no new device will be detected anymore.
thanks for trying this out and for reporting back.
can you please also test if running "lsusb -vvv" (as root) makes the
devices show up?
background info: the Amlogic Meson GXBB SoC on your Odroid-C2 board
uses a "dwc2" USB 2.0 controller.
I don't have any GXBB based board, but my Odroid-C1+ uses the same
controller and overall setup. There I can reproduce the problem you
are seeing.
I am not sure which part of the "infrastructure" (on-board 4-port USB
hub, dwc2 controller, ...) is causing this issue.
My suggestion is to involve the linux-usb mailing list and dwc2 driver
maintainer:
- Minas Harutyunyan <hmi...@synopsys.com> (dwc2 driver maintainer)
- linux-...@vger.kernel.org (usb mailing list)
In the past they provided information and helped to debug issues.
Please also keep me Cc'ed so I can help with any Amlogic specific
questions, drivers, etc.
Best regards,
Martin
