commit a8a9552d75f91b05a65a1da7281e877d71f87b94
author Rex-BC Chen <rex-bc.chen@mediatek.corp-partner.google.com> Tue Jan 04 11:07:22 2022 +0800
committer Hung-Te Lin <hungte@chromium.org> Thu Jan 06 02:24:33 2022 +0000
tree b46bc42d78f9d554c2dc5a50734563513e3412a3
parent df1d2b4bb9f0a196ac61ec7cafd16b3428d6f1ac

mb/google/corsola: Configure audio

According schematics, we configure audio by turning on setting of
audio power and selecting I2S pin-mux.

Schematics references:
kingler: schematic_kingler_proto0_gerber_20211115.pdf
krabby: crab_proto 0_20211112_final.pdf

BUG=b:204164695
TEST=Verified by CLI command(badusbbeep/devbeep) on kingler and krabby

Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Change-Id: Ia6374d0e5535b7cff4df8759312786fef8b94b6b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60738
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>

src/mainboard/google/corsola/mainboard.c

diff --git a/src/mainboard/google/corsola/mainboard.c b/src/mainboard/google/corsola/mainboard.c
index 910d8d6..959dca6 100644
--- a/src/mainboard/google/corsola/mainboard.c
+++ b/src/mainboard/google/corsola/mainboard.c
@@ -24,6 +24,17 @@
 	register_bl31_aux_param(&param_reset.h);
 }
 
+static void configure_audio(void)
+{
+	mtcmos_audio_power_on();
+
+	/* Set up I2S */
+	gpio_set_mode(GPIO(I2S2_MCK), PAD_I2S2_MCK_FUNC_I2S2_MCK);
+	gpio_set_mode(GPIO(I2S2_BCK), PAD_I2S2_BCK_FUNC_I2S2_BCK);
+	gpio_set_mode(GPIO(I2S2_LRCK), PAD_I2S2_LRCK_FUNC_I2S2_LRCK);
+	gpio_set_mode(GPIO(EINT4), PAD_EINT4_FUNC_I2S3_DO);
+}
+
 static void mainboard_init(struct device *dev)
 {
 	mtk_msdc_configure_emmc(true);
@@ -35,6 +46,8 @@
 
 	setup_usb_host();
 
+	configure_audio();
+
 	if (spm_init())
 		printk(BIOS_ERR, "spm init failed, system suspend may not work\n");