soc/amd/cezanne/fsp_m_params: set HD Audio enable UPD from devicetree

Pass the info if the non-graphics HD audio controller device is enabled
or disabled in the board's devicetree via a UPD to the FSP so that it
knows if it should enable or disable the corresponding device.

TEST=When adding "device ref hda on end" to the devicetree of
amd/majolica the non-graphics HD Audio controller shows up in lspci and
when that line isn't added the PCIe device doesn't show up.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I9f5e164d308906bfc788e5c2674c13c7b2ebf471
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55680
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/src/soc/amd/cezanne/fsp_m_params.c b/src/soc/amd/cezanne/fsp_m_params.c
index 5601568d30..1a0366b4fa 100644
--- a/src/soc/amd/cezanne/fsp_m_params.c
+++ b/src/soc/amd/cezanne/fsp_m_params.c
@@ -36,6 +36,29 @@ static bool devtree_gfx_hda_dev_enabled(void)
 	return gfx_hda_dev->enabled;
 }
 
+static const struct device_path hda_path[] = {
+	{
+		.type = DEVICE_PATH_PCI,
+		.pci.devfn = PCIE_ABC_A_DEVFN
+	},
+	{
+		.type = DEVICE_PATH_PCI,
+		.pci.devfn = HD_AUDIO_DEVFN
+	},
+};
+
+static bool devtree_hda_dev_enabled(void)
+{
+	const struct device *hda_dev;
+
+	hda_dev = find_dev_nested_path(pci_root_bus(), hda_path, ARRAY_SIZE(hda_path));
+
+	if (!hda_dev)
+		return false;
+
+	return hda_dev->enabled;
+}
+
 static const struct device_path sata0_path[] = {
 	{
 		.type = DEVICE_PATH_PCI,
@@ -202,6 +225,7 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version)
 	mcfg->pspp_policy = config->pspp_policy;
 
 	mcfg->enable_nb_azalia = devtree_gfx_hda_dev_enabled();
+	mcfg->hda_enable = devtree_hda_dev_enabled();
 	mcfg->sata_enable = devtree_sata_dev_enabled();
 
 	if (config->usb_phy_custom)