soc/intel/alderlake: Add enum for HDA audio configuration

This change adds an enum to configure the audio related UPDs used for
configuring the audio over HDMI/DP and rename a variable for better
readability.

TEST=On shadowmountain audio sound cards are detected and listed by the
Linux kernel. Audio playback and capture is working fine.

Change-Id: I2834d6f4ce1651a609c5563af375f6e365d931fa
Signed-off-by: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51658
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 16 insertions, 3 deletions

diff --git a/src/soc/intel/alderlake/chip.h b/src/soc/intel/alderlake/chip.h
index e0d0b6074f..201150e8fc 100644
--- a/src/soc/intel/alderlake/chip.h
+++ b/src/soc/intel/alderlake/chip.h
@@ -113,9 +113,22 @@ struct soc_intel_alderlake_config {
 
 	/* Audio related */
 	uint8_t PchHdaDspEnable;
-	uint8_t PchHdaIDispLinkTmode;
-	uint8_t PchHdaIDispLinkFrequency;
-	uint8_t PchHdaIDispCodecDisconnect;
+
+	/* iDisp-Link T-Mode 0: 2T, 2: 4T, 3: 8T, 4: 16T */
+	enum {
+		HDA_TMODE_2T = 0,
+		HDA_TMODE_4T = 2,
+		HDA_TMODE_8T = 3,
+		HDA_TMODE_16T = 4,
+	} PchHdaIDispLinkTmode;
+
+	/* iDisp-Link Freq 4: 96MHz, 3: 48MHz. */
+	enum {
+		HDA_LINKFREQ_48MHZ = 3,
+		HDA_LINKFREQ_96MHZ = 4,
+	} PchHdaIDispLinkFrequency;
+
+	bool PchHdaIDispCodecEnable;
 
 	struct pcie_rp_config pch_pcie_rp[CONFIG_MAX_PCH_ROOT_PORTS];
 	struct pcie_rp_config cpu_pcie_rp[CONFIG_MAX_CPU_ROOT_PORTS];