Change in coreboot[master]: mb/google/brya: Disable unused i2s pins for BT offload

[Sugnan Prabhu S (Code Review)]

Sugnan Prabhu S has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/58137 )

Change subject: mb/google/brya: Disable unused i2s pins for BT offload
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mb/google/brya: Disable unused i2s pins for BT offload

BT offload hardware design is using only i2s0 pins. Need to disable
i2s2 pins which are not used. As per the hardware spec there is an OR
operation between vgpio and physical gpio pins related to i2s2. During
BT offload configuring the i2s2 pins to its native function is causing
offload issue on proto 2 boards.

BUG=b:201736222
TEST=Verified BT offload on brya on proto 1 and proto 2.

Change-Id: Ifbc53848c6ad12e537216cac3c2871088c094f3d
Signed-off-by: Sugnan Prabhu S 
---
M src/mainboard/google/brya/variants/brya0/fw_config.c
1 file changed, 16 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/37/58137/1

diff --git a/src/mainboard/google/brya/variants/brya0/fw_config.c b/src/mainboard/google/brya/variants/brya0/fw_config.c
index 97b460f..17d284a 100644
--- a/src/mainboard/google/brya/variants/brya0/fw_config.c
+++ b/src/mainboard/google/brya/variants/brya0/fw_config.c
@@ -33,22 +33,28 @@
    PAD_NC(GPP_S5, NONE),
 };

-static const struct pad_config i2s_enable_pads[] = {
+static const struct pad_config i2s0_enable_pads[] = {
    PAD_CFG_NF(GPP_R0, NONE, DEEP, NF2),	/* I2S_HP_SCLK_R */
    PAD_CFG_NF(GPP_R1, NONE, DEEP, NF2),	/* I2S_HP_SFRM_R */
    PAD_CFG_NF(GPP_R2, DN_20K, DEEP, NF2),	/* I2S_PCH_TX_HP_RX_STRAP */
    PAD_CFG_NF(GPP_R3, NONE, DEEP, NF2),	/* I2S_PCH_RX_HP_TX */
+};
+
+static const struct pad_config i2s2_enable_pads[] = {
    PAD_CFG_NF(GPP_R4, NONE, DEEP, NF2),	/* I2S_SPKR_SCLK_R */
    PAD_CFG_NF(GPP_R5, NONE, DEEP, NF2),	/* I2S_SPKR_SFRM_R */
    PAD_CFG_NF(GPP_R6, NONE, DEEP, NF2),	/* I2S_PCH_TX_SPKR_RX_R */
    PAD_CFG_NF(GPP_R7, NONE, DEEP, NF2),	/* I2S_PCH_RX_SPKR_TX */
 };

-static const struct pad_config i2s_disable_pads[] = {
+static const struct pad_config i2s0_disable_pads[] = {
    PAD_NC(GPP_R0, NONE),
    PAD_NC(GPP_R1, NONE),
    PAD_NC(GPP_R2, NONE),
    PAD_NC(GPP_R3, NONE),
+};
+
+static const struct pad_config i2s2_disable_pads[] = {
    PAD_NC(GPP_R4, NONE),
    PAD_NC(GPP_R5, NONE),
    PAD_NC(GPP_R6, NONE),
@@ -80,7 +86,8 @@
 static void enable_i2s(void)
 {
    gpio_configure_pads(dmic_enable_pads, ARRAY_SIZE(dmic_enable_pads));
-	gpio_configure_pads(i2s_enable_pads, ARRAY_SIZE(i2s_enable_pads));
+	gpio_configure_pads(i2s0_enable_pads, ARRAY_SIZE(i2s0_enable_pads));
+	gpio_configure_pads(i2s2_enable_pads, ARRAY_SIZE(i2s2_enable_pads));
    gpio_configure_pads(sndw_disable_pads, ARRAY_SIZE(sndw_disable_pads));
 }

@@ -88,7 +95,8 @@
 {
    if (!fw_config_is_provisioned() || fw_config_probe(FW_CONFIG(AUDIO, AUDIO_UNKNOWN))) {
    	printk(BIOS_INFO, "Disable audio related GPIO pins.\n");
-		gpio_configure_pads(i2s_disable_pads, ARRAY_SIZE(i2s_disable_pads));
+		gpio_configure_pads(i2s0_disable_pads, ARRAY_SIZE(i2s0_disable_pads));
+		gpio_configure_pads(i2s2_disable_pads, ARRAY_SIZE(i2s2_disable_pads));
    	gpio_configure_pads(dmic_disable_pads, ARRAY_SIZE(dmic_disable_pads));
    	gpio_configure_pads(sndw_disable_pads, ARRAY_SIZE(sndw_disable_pads));
    	return;
@@ -99,11 +107,13 @@
    	gpio_configure_pads(dmic_enable_pads, ARRAY_SIZE(dmic_enable_pads));
    	gpio_configure_pads(sndw_enable_pads, ARRAY_SIZE(sndw_enable_pads));
    	printk(BIOS_INFO, "BT offload enabled\n");
-		gpio_configure_pads(i2s_enable_pads, ARRAY_SIZE(i2s_enable_pads));
+		gpio_configure_pads(i2s0_enable_pads, ARRAY_SIZE(i2s0_enable_pads));
+		gpio_configure_pads(i2s2_disable_pads, ARRAY_SIZE(i2s2_disable_pads));
    	gpio_configure_pads(bt_i2s_enable_pads, ARRAY_SIZE(bt_i2s_enable_pads));
    } else {
    	printk(BIOS_INFO, "BT offload disabled\n");
-		gpio_configure_pads(i2s_disable_pads, ARRAY_SIZE(i2s_disable_pads));
+		gpio_configure_pads(i2s0_disable_pads, ARRAY_SIZE(i2s0_disable_pads));
+		gpio_configure_pads(i2s2_disable_pads, ARRAY_SIZE(i2s2_disable_pads));
    	gpio_configure_pads(bt_i2s_disable_pads, ARRAY_SIZE(bt_i2s_disable_pads));
    }