rush: Configure display related clock, pad, and power

BUG=chrome-os-partner:34336
BRANCH=none
TEST=build rush

Change-Id: I9c2235ccc5571f1919dc013c62488390fe31dcbc
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 7468c14842c680be81620ad3fd2ea9ae056d525f
Original-Change-Id: Iaf7f70727fc914b9bb2d063c9a30ece4451d40da
Original-Signed-off-by: Jimmy Zhang <jimmzhang@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/238942
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9613
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

3 files changed, 55 insertions, 10 deletions

diff --git a/src/mainboard/google/rush/mainboard.c b/src/mainboard/google/rush/mainboard.c
index 0b85cc0356..2ea0841138 100644
--- a/src/mainboard/google/rush/mainboard.c
+++ b/src/mainboard/google/rush/mainboard.c
@@ -1,7 +1,7 @@
 /*
  * This file is part of the coreboot project.
  *
- * Copyright 2014 Google Inc.
+ * Copyright 2015 Google Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -32,6 +32,9 @@
 #include <soc/nvidia/tegra/dc.h>
 #include <soc/display.h>
 
+#include <vendorcode/google/chromeos/chromeos.h>
+#include <delay.h>
+
 static const struct pad_config sdmmc3_pad[] = {
 	/* MMC3(SDCARD) */
 	PAD_CFG_SFIO(SDMMC3_CLK, PINMUX_INPUT_ENABLE, SDMMC3),
@@ -68,6 +71,18 @@ static const struct pad_config padcfgs[] = {
 	 * voltage source likes to drive them low on overcurrent conditions */
 	PAD_CFG_GPIO_INPUT(USB_VBUS_EN0, PINMUX_PULL_UP),
 	PAD_CFG_GPIO_INPUT(USB_VBUS_EN1, PINMUX_PULL_UP),
+
+	/* backlight_vdd_gpio: P2 */
+	PAD_CFG_GPIO_OUT0(DAP3_DOUT, PINMUX_PULL_NONE),
+
+	/* backlight_en_gpio: H2 */
+	PAD_CFG_GPIO_OUT0(GPIO_PH2, PINMUX_PULL_NONE),
+
+	/* backlight_pwm: H1 */
+	PAD_CFG_SFIO(GPIO_PH1, PINMUX_PULL_NONE, PWM1),
+
+	/* DP HPD */
+	PAD_CFG_SFIO(DP_HPD, PINMUX_INPUT_ENABLE, DP),
 };
 
 static const struct pad_config i2c1_pad[] = {
@@ -112,6 +127,27 @@ static const struct funit_cfg audio_funit[] = {
 	FUNIT_CFG(I2S1, CLK_M, 1500, i2s1_pad, ARRAY_SIZE(i2s1_pad)),
 };
 
+static void configure_display_clocks(void)
+{
+	u32 lclks = CLK_L_DISP1 | CLK_L_HOST1X | CLK_L_PWM;
+	u32 xclks = CLK_X_DPAUX | CLK_X_SOR0;
+
+	clock_enable_clear_reset(lclks, 0, 0, 0, 0, xclks);
+
+	/* Give clocks time to stabilize. */
+	udelay(IO_STABILIZATION_DELAY);
+}
+
+static int configure_display_blocks(void)
+{
+	soc_configure_host1x();
+
+	/* enable display related clocks */
+	configure_display_clocks();
+
+	return 0;
+}
+
 /* Audio init: clocks and enables/resets */
 static void setup_audio(void)
 {
@@ -146,6 +182,10 @@ static void mainboard_init(device_t dev)
 
 	setup_audio();
 	i2c_init(I2C1_BUS);		/* for max98090 codec */
+
+	/* if panel needs to bringup */
+	if (!vboot_skip_display_init())
+		configure_display_blocks();
 }
 
 void display_startup(device_t dev)
diff --git a/src/soc/nvidia/tegra132/i2c6.c b/src/soc/nvidia/tegra132/i2c6.c
index 86373d621e..73a98562ad 100644
--- a/src/soc/nvidia/tegra132/i2c6.c
+++ b/src/soc/nvidia/tegra132/i2c6.c
@@ -83,14 +83,7 @@ void soc_configure_i2c6pad(void)
 	 * and put Host1X back in reset. DPAUX must remain out of
 	 * reset and the SOR partition must remained unpowergated.
 	 */
-	power_ungate_partition(POWER_PARTID_SOR);
-
-	/* Host1X needs a valid clock source so DPAUX can be accessed */
-	clock_configure_source(host1x, PLLP, 204000);
-
-	enable_sor_periph_clocks();
-	remove_clamps(POWER_PARTID_SOR);
-	unreset_sor_periphs();
+	soc_configure_host1x();
 
 	/* Now we can write the I2C6 mux in DPAUX */
 	write32(I2C6_PADCTL, (void *)DPAUX_HYBRID_PADCTL);
@@ -106,3 +99,15 @@ void soc_configure_i2c6pad(void)
 	disable_sor_periph_clocks();
 	clock_set_reset_l(CLK_L_HOST1X);
 }
+
+void soc_configure_host1x(void)
+{
+	power_ungate_partition(POWER_PARTID_SOR);
+
+	/* Host1X needs a valid clock source so DPAUX can be accessed. */
+	clock_configure_source(host1x, PLLP, 204000);
+
+	enable_sor_periph_clocks();
+	remove_clamps(POWER_PARTID_SOR);
+	unreset_sor_periphs();
+}
diff --git a/src/soc/nvidia/tegra132/include/soc/padconfig.h b/src/soc/nvidia/tegra132/include/soc/padconfig.h
index 569fe4624c..843b4ee1cd 100644
--- a/src/soc/nvidia/tegra132/include/soc/padconfig.h
+++ b/src/soc/nvidia/tegra132/include/soc/padconfig.h
@@ -87,5 +87,5 @@ struct pad_config {
 void soc_configure_pads(const struct pad_config * const entries, size_t num);
 /* I2C6 requires special init as its pad lives int the SOR/DPAUX block */
 void soc_configure_i2c6pad(void);
-
+void soc_configure_host1x(void);
 #endif /* __SOC_NVIDIA_TEGRA132_PAD_CFG_H */