coreboot

Download

coreboot@coreboot.org

July 2020

46 participants
42 discussions

T440p Audio Out
by acaleechurn＠gmail.com July 1, 2020

July 1, 2020

Hello, The headphone jack is documented as broken and i was wondering if someone could help following a few tests I carried out with two identical laptops, one running the stock bios and the other corebooted. When unplugged the value is always value = 0x0 and when plugged the value changes to value = 0x80000000. When docked the value on the stock bios gets updated but not in coreboot. When using the headphone it gets updated but no sound is output. STOCK BIOS - Headphone sudo hda-verb /dev/snd/hwC1D0 0x15 GET_PIN_SENSE 0 nid = 0x15, verb = 0xf09, param = 0x0 value = 0x0 = Unplugged sudo hda-verb /dev/snd/hwC1D0 0x15 GET_PIN_SENSE 0 nid = 0x15, verb = 0xf09, param = 0x0 value = 0x80000000 = Plugged **Sound Works** COREBOOT - Headphone sudo hda-verb /dev/snd/hwC1D0 0x15 GET_PIN_SENSE 0 nid = 0x15, verb = 0xf09, param = 0x0 value = 0x0 = Unplugged sudo hda-verb /dev/snd/hwC1D0 0x15 GET_PIN_SENSE 0 nid = 0x15, verb = 0xf09, param = 0x0 value = 0x80000000 = Plugged **Sound does not work** STOCK BIOS - Docked [Headphone jack on the dock] sudo hda-verb /dev/snd/hwC1D0 0x16 GET_PIN_SENSE 0 nid = 0x16, verb = 0xf09, param = 0x0 value = 0x0 = Unplugged sudo hda-verb /dev/snd/hwC1D0 0x16 GET_PIN_SENSE 0 nid = 0x16, verb = 0xf09, param = 0x0 value = 0x80000000 = Plugged COREBOOT - Docked [Headphone jack on the dock] sudo hda-verb /dev/snd/hwC1D0 0x16 GET_PIN_SENSE 0 nid = 0x16, verb = 0xf09, param = 0x0 value = 0x0 = Unplugged hda-verb /dev/snd/hwC1D0 0x16 GET_PIN_SENSE 0 nid = 0x16, verb = 0xf09, param = 0x0 value = 0x0 = Plugged but not updated!!! ONLY the MIC is detected and enabled sudo hda-verb /dev/snd/hwC1D0 0x19 GET_PIN_SENSE 0 nid = 0x19, verb = 0xf09, param = 0x0 value = 0x0 = unplugged sudo hda-verb /dev/snd/hwC1D0 0x19 GET_PIN_SENSE 0 nid = 0x19, verb = 0xf09, param = 0x0 value = 0x80000000 = Plugged and Updated!!! When docked the mic is enabled by default but headphone is not detected. Strangely if i plug another headphone in the laptop headphone jack, the dock headphones start working! Could it be that the file https://github.com/coreboot/coreboot/blob/master/src/mainboard/lenovo/t440p… is missing the info about the jack being a combo port just like in the t520 https://github.com/rockchip-linux/coreboot/blob/master/src/mainboard/lenovo…

3 2

[PATCH v4 0/2] firmware: google: Expose coreboot tables and CBMEM
by patrick.rudolph＠9elements.com June 30, 2020

June 30, 2020

From: Patrick Rudolph <patrick.rudolph(a)9elements.com> As user land tools currently use /dev/mem to access coreboot tables and CBMEM, provide a better way by using read-only sysfs attributes. Unconditionally expose all tables and buffers making future changes in coreboot possible without modifying a kernel driver. Changes in v2: - Add ABI documentation - Add 0x prefix on hex values - Remove wrong ioremap hint as found by CI Changes in v3: - Use BIN_ATTR_RO Changes in v4: - Use temporary memremap instead of persistent ioremap - Constify a struct - Get rid of unused headers - Use dev_{get|set}_drvdata - Use dev_groups to automatically handle attributes - Updated file description - Updated ABI documentation Patrick Rudolph (2): firmware: google: Expose CBMEM over sysfs firmware: google: Expose coreboot tables over sysfs Documentation/ABI/stable/sysfs-bus-coreboot | 74 +++++++++++ drivers/firmware/google/Kconfig | 9 ++ drivers/firmware/google/Makefile | 1 + drivers/firmware/google/cbmem-coreboot.c | 128 ++++++++++++++++++++ drivers/firmware/google/coreboot_table.c | 58 +++++++++ drivers/firmware/google/coreboot_table.h | 14 +++ 6 files changed, 284 insertions(+) create mode 100644 Documentation/ABI/stable/sysfs-bus-coreboot create mode 100644 drivers/firmware/google/cbmem-coreboot.c -- 2.24.1

4 9