From aee3b148ba8263e983de12cfb873ee5ec6d0569f Mon Sep 17 00:00:00 2001 From: Furquan Shaikh Date: Thu, 18 Jun 2020 22:25:12 -0700 Subject: mb/google/zork: Generate I2SM ACPI device at runtime This change moves the generation of I2SM ACPI device from static asl file to runtime generation by ACP device driver. dmic_select_gpio is set to match version 3+ of Trembyle and Dalboz schematics. In order to maintain backward compatibility, dmic_select_gpio is updated at runtime using variant_audio_update for board versions that are prior to version 3 of reference schematics. The only difference from static generation is that the device I2SM is added under ACPD (i.e. ACP device) instead of CREC (Chrome EC device). It does not make any functional difference from the kernel perspective. BUG=b:157603026 TEST=Verified that the following device gets generated in SSDT: Scope (\_SB.PCI0.PBRA.ACPD) { Device (I2SM) { Name (_HID, "AMDI5682") // _HID: Hardware ID Name (_UID, One) // _UID: Unique ID Name (_DDN, "I2S machine driver") // _DDN: DOS Device Name Method (_STA, 0, NotSerialized) // _STA: Status { Return (0x0F) } Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings { GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly, "\\_SB.GPIO", 0x00, ResourceConsumer, , ) { // Pin list 0x000D } }) Name (_DSD, Package (0x02) // _DSD: Device-Specific Data { ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301") /* Device Properties for _DSD */, Package (0x01) { Package (0x02) { "dmic-gpios", Package (0x04) { \_SB.PCI0.PBRA.ACPD.I2SM, Zero, Zero, Zero } } } }) } } Verified audio via speakers and mic input. Signed-off-by: Furquan Shaikh Change-Id: I5d1602c7f719eef9487ddea68e429d27408f9a76 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/2253638 Commit-Queue: Furquan Shaikh Tested-by: Furquan Shaikh Reviewed-by: Aaron Durbin Reviewed-on: https://review.coreboot.org/c/coreboot/+/42971 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Aaron Durbin --- src/mainboard/google/zork/variants/baseboard/devicetree.cb | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'src/mainboard/google/zork/variants/baseboard/devicetree.cb') diff --git a/src/mainboard/google/zork/variants/baseboard/devicetree.cb b/src/mainboard/google/zork/variants/baseboard/devicetree.cb index 3cc311b171..93247492ed 100644 --- a/src/mainboard/google/zork/variants/baseboard/devicetree.cb +++ b/src/mainboard/google/zork/variants/baseboard/devicetree.cb @@ -16,6 +16,16 @@ chip soc/amd/picasso register "acp_pin_cfg" = "I2S_PINS_I2S_TDM" + # DMIC select GPIO for ACP machine device + # This GPIO is used to select DMIC0 or DMIC1 by the kernel driver. It does not + # really have a polarity since low and high control the selection of DMIC and + # hence does not have an active polarity. + # Kernel driver does not use the polarity field and instead treats the GPIO + # selection as follows: + # Set low (0) = Select DMIC0 + # Set high (1) = Select DMIC1 + register "dmic_select_gpio" = "ACPI_GPIO_OUTPUT(GPIO_67)" + # Start : OPN Performance Configuration # (Configuratin that is common for all variants) # For the below fields, 0 indicates use SOC default -- cgit v1.2.3