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mb/google/myst: Add PCIe shutdown workaround

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On Myst, the FSP is shutting down the PCIe lanes that the SSD is
on.  Enable hotplug to force the FSP to keep the lanes active.

BUG=b:284213391
TEST=Boot to OS

Signed-off-by: Jon Murphy <jpmurphy@google.com>
Change-Id: Iaf0aca329f05f15a3ce9edfa6a0e782c2edccabe
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75583
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
This commit is contained in:
Jon Murphy 2023-06-01 14:40:37 -06:00 • committed by Martin L Roth
commit ba5a2a189e
1 changed files with 4 additions and 0 deletions
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4
src/mainboard/google/myst/port_descriptors.c
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@ -54,6 +54,8 @@ static const fsp_dxio_descriptor emmc_descriptor = {
.function_number = PCI_FUNC(NVME_DEVFN),
.link_speed_capability = GEN_MAX,
.turn_off_unused_lanes = true,
/* TODO(b/284213391): Fix PCIe shutdown */
.link_hotplug = 3,
.clk_req = CLK_REQ3,
};
@ -66,6 +68,8 @@ static const fsp_dxio_descriptor nvme_descriptor = {
.function_number = PCI_FUNC(NVME_DEVFN),
.link_speed_capability = GEN_MAX,
.turn_off_unused_lanes = true,
/* TODO(b/284213391): Fix PCIe shutdown */
.link_hotplug = 3,
.clk_req = CLK_REQ3,
};