Page locked

This page is currently locked for editing by another user. You have to wait until this user finishes editing or the lock expires.
Currently locked by: 216.73.216.240,10.89.1.2
Lock expires at: 2025/06/18 01:05 (10 min)
This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
Here I'm documenting my progress on using my ac100-116 "the right way". Feel free to reach me on [[help#irc]], my nick is PaulFertser.

First things first: for now the serial console is needed because the kernel doesn't yet initialise the display properly.

I use a toolchain compiled by Gentoo crossdev, [[putusb]], [[uboot]].

Configure u-boot with "make paz00_config" and build it with your toolchain.

Kernel should have all tegrapart-related options disabled, as tegrapart oopses when there's no corresponding option on the command line. Also a minor kernel patch seem to be needed for now.
<code>
diff --git a/arch/arm/mach-tegra/board-paz00-panel.c b/arch/arm/mach-tegra/board-paz00-panel.c
index e65488d..f8cf7d4 100644
--- a/arch/arm/mach-tegra/board-paz00-panel.c
+++ b/arch/arm/mach-tegra/board-paz00-panel.c
@@ -346,9 +346,11 @@ int __init paz00_panel_init(size_t fb_addr)
        gpio_request_one(TEGRA_HDMI_HPD, GPIOF_IN, "hdmi_hpd");
        gpio_export(TEGRA_LVDS_SHUTDOWN, 0);
 
-       paz00_disp1_resources[2].start = fb_addr;
-       /* 2.4 MB framebuffer should be enough */
-       paz00_disp1_resources[2].end =   fb_addr + 0x26B000 - 1;
+       if (fb_addr) {
+               paz00_disp1_resources[2].start = fb_addr;
+               /* 2.4 MB framebuffer should be enough */
+               paz00_disp1_resources[2].end =   fb_addr + 0x26B000 - 1;
+       }
 
        err = platform_add_devices(paz00_gfx_devices,
                                   ARRAY_SIZE(paz00_gfx_devices));
diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c
index 9e06a21..65c1137 100644
--- a/arch/arm/mach-tegra/clock.c
+++ b/arch/arm/mach-tegra/clock.c
@@ -339,9 +339,14 @@ int clk_set_rate_locked(struct clk *c, unsigned long rate)
                        return ret;
        }
 
-       ret = c->ops->set_rate(c, rate);
-       if (ret)
-               return ret;
+       if (c->ops && c->ops->set_rate) {
+               ret = c->ops->set_rate(c, rate);
+               if (ret)
+                       return ret;
+       } else {
+               pr_warn("set_rate() for %s is needed but not available\n",
+                       c->name);
+       }
 
        if (clk_is_auto_dvfs(c) && rate < old_rate && c->refcnt > 0)
                ret = tegra_dvfs_set_rate(c, rate);
</code>

I then used my laptop and an SD card, created a single ext2 partition there and unpacked the preinstalled ubuntu rootfs. Copied the uImage to root and the created modules to /lib/modules. Erased unneeded boot scripts (including network-manager) from /etc/init/. Created there a file to start getty on ttyS0, 115200 baud. Placed a suitable wpa_supplicant.conf somewhere on the card. Removed password from /etc/shadow to give me root login.

I boot the u-boot.bin via putusb, then <code>mmc dev 1; ext2load mmc 1 0x408000 uImage; set bootargs "mem=448M@0M console=ttyS0,115200n8 root=/dev/mmcblk1p1"; bootm</code>

Logged in, set password to 1, start "wpa_supplicant -Dnl80211 -iwlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf &", then dhclient eth0. Installed openssh-server and switched to that (because the serial console sometimes stops to function).

Installed gdisk and repartitioned from scratch /dev/mmcblk0, creating two partitions there (one for /boot, 32M should be enough), another for LVM pv. Created LVM there, with two (for now) volumes: 1G for swap, and everything else for the rootfs. mkfs.nilfs /dev/emmc-lvm/rootfs. Mounted it, and started to Debootstrap debian armhf according to the official manual (you'll need to read both installing debian and armhf chroot).

Copied /lib/firmware/rt2870.bin to the newly established system, configured /etc/network/interfaces to bring up wlan0 for my home wlan automatically. Created a symlink from /bin/true to /usr/sbin/mkfs.nilfs2 to make the boot happy.

Initramfs is a bit tricky: a workaround from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=649288 is needed (it has a typo where .. is used instead of . and also the script should be made +x), and also i had to add lvm vgchange -aly --ignorelockingfailure to the end of /usr/share/initramfs-tools/scripts/local-top/lvm2. Add nilfs2 to /etc/initramfs-tools/modules. Make a symlink from initrd-3.0.8 to ``initramfs'' in /boot.

The resulting system should be bootable with
<code>
mmc dev 0; ext2load mmc 0 0x408000 uImage; ext2load mmc 0 0x1408000 initramfs; set bootargs "mem=448M@0M console=ttyS0,115200n8 root=/dev/emmc-lvm/rootfs initrd=0x1408000,0x${filesize}"; bootm 0x408000
</code>