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mb/google/mancomb: Enable some PCIe power saving features 

Enable ASPM, Common Clock and Clock Power Managment. Accomplish this
by adding the options in the platform Kconfig as well as dxio
descriptors.

BUG=b:187743927
TEST=Boot to ChromeOS and see ASPM, CC and Clock PM enabled with lspci

Change-Id: I9d6e606763798afc6b797d7d24ee7cae09f9e33f
Signed-off-by: Matt Papageorge <matthewpapa07@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54681
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Matt Papageorge 2021-05-19 10:04:27 -05:00 committed by Patrick Georgi
parent c46bb69495
commit d981c49038
2 changed files with 7 additions and 0 deletions
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3
src/mainboard/google/mancomb/Kconfig
View File

@ -28,6 +28,9 @@ config BOARD_SPECIFIC_OPTIONS
select MAINBOARD_HAS_CHROMEOS
select MAINBOARD_HAS_I2C_TPM_CR50
select MAINBOARD_HAS_TPM2
select PCIEXP_ASPM
select PCIEXP_CLK_PM
select PCIEXP_COMMON_CLOCK
select PSP_DISABLE_POSTCODES
select SOC_AMD_CEZANNE
select SOC_AMD_COMMON_BLOCK_USE_ESPI

4
src/mainboard/google/mancomb/port_descriptors.c
View File

@ -12,6 +12,7 @@ static const fsp_dxio_descriptor mancomb_czn_dxio_descriptors[] = {
.end_logical_lane = 0,
.device_number = 2,
.function_number = 1,
.link_aspm = ASPM_L1,
.turn_off_unused_lanes = true,
.clk_req = CLK_REQ0,
.gpio_group_id = GPIO_29,
@ -24,6 +25,7 @@ static const fsp_dxio_descriptor mancomb_czn_dxio_descriptors[] = {
.end_logical_lane = 1,
.device_number = 2,
.function_number = 2,
.link_aspm = ASPM_L1,
.turn_off_unused_lanes = true,
.clk_req = CLK_REQ1,
.gpio_group_id = GPIO_70,
@ -36,6 +38,7 @@ static const fsp_dxio_descriptor mancomb_czn_dxio_descriptors[] = {
.end_logical_lane = 2,
.device_number = 2,
.function_number = 3,
.link_aspm = ASPM_L1,
.turn_off_unused_lanes = true,
.clk_req = CLK_REQ2,
.gpio_group_id = GPIO_18,
@ -48,6 +51,7 @@ static const fsp_dxio_descriptor mancomb_czn_dxio_descriptors[] = {
.end_logical_lane = 7,
.device_number = 2,
.function_number = 4,
.link_aspm = ASPM_L1,
.turn_off_unused_lanes = true,
.clk_req = CLK_REQ3,
.gpio_group_id = GPIO_40,