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authorNicholas Chin <nic.c3.14@gmail.com>2023-08-19 16:19:10 -0600
committerFelix Singer <service+coreboot-gerrit@felixsinger.de>2024-06-08 06:18:28 +0000
commitf0fb3af828b3b457c4487a174440e6f6b6d073ca (patch)
tree1e7a56fc4f908f1f5a78a962eadd3ca7d24f528d /Documentation/mainboard/dell
parentba47ff7197a522f7fd932f6f1dbbe3ad819c7a09 (diff)
mb/dell: Add Latitude E6430 (Ivy Bridge)
Mainboard is QAL80/LA-7781P (UMA). The version with an Nvidia dGPU was not tested. This is based on the autoport output with some manual fixes. The VBT was obtained using `intelvbttool --inlegacy --outvbt data.vbt` while running version A24 (latest version) of the vendor firmware. The flash is 8MiB + 4MiB, and can be easily accessed by removing the keyboard. It can also be internally flashed by sending a command to the EC, which causes the EC to pull the FDO pin low and the firmware to skip setting up any chipset based write protections [1]. The EC is the SMSC MEC5055, which seems to be compatible with the existing MEC5035 code. Working: - Libgfxinit - USB EHCI debug (left side usb port is HCD index 2, middle port on the right side is HCD index 1) with the CH347 - Keyboard - Touchpad/trackpoint - ExpressCard (tested with USB 3.0 card) - Audio - Ethernet - SD card reader - mPCIe WiFi - SeaBIOS 1.16.3 - edk2 (MrChromebox's fork, uefipayload_202309) - Internal flashing using dell-flash-unlock Not working: - S3 suspend: Possibly EC related, DRAM power is getting cut when entering S3 - Physical wireless switch: this triggers an SMI handler in the vendor firmware which sends commands to the EC to enable/disable wireless devices, and has not been reimplemented - Battery reporting: needs ACPI code for the EC - Brightness hotkeys: probably EC related - The system reports that the power button was pressed and shuts down when the CPU hits around 86 degrees Celsius, before the CPU can thermal throttle. Likely EC and possibly PECI related. - Integrated keyboard with upstream GRUB 2.12 payload: Upstream GRUB initializes the 8042 PS/2 controller in a way that is incompatible with how the EC firmware emulates it. GRUB tries to initialize the controller with scan code set 2 without translation, but the EC only ever returns set 1 scan codes to the system and thus is only works as an untranslated set 1 keyboard or a translated set 2 keyboard, regardless of commands to set the scan code. A USB keyboard works fine. Unknown/untested: - Dock - eSATA - TPM - dGPU on non-UMA model - Bluetooth module (not included on my system) [1] https://gitlab.com/nic3-14159/dell-flash-unlock Change-Id: I93c6622fc5da1d0d61a5b2c197ac7227d9525908 Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/77444 Reviewed-by: Elyes Haouas <ehaouas@noos.fr> Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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