Gabe Black (gabeblack@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3717
-gerrit
commit 66b74962504a81989a974927ad7f89b7941f93f0 Author: Gabe Black gabeblack@google.com Date: Fri Jun 28 14:27:16 2013 -0700
pit: Replace the tps65090 functions and adjust the hotplug detect line.
The functions which manipulated the tps65090 were removed a while ago because it isn't accessible directly from the AP, it's on an I2C bus that has to be accessed by the EC on our behalf. Now that that capability has been added, we can rewrite the small portion of the the tps65090 we actually used but using the EC passthrough commands.
Also, we should not be configuring the hardware display port hotplug detect line since we're using it as a GPIO for other purposes. The GPIO we're using instead defaults to being an input, but to be safe we should probably explicitly configure it as one anyway.
Change-Id: I7f8a8a767e3cccb813513940a5feceea482982f5 Signed-off-by: Gabe Black gabeblack@chromium.org --- src/mainboard/google/pit/mainboard.c | 39 ++++++++++++++++++++++++++++++++---- 1 file changed, 35 insertions(+), 4 deletions(-)
diff --git a/src/mainboard/google/pit/mainboard.c b/src/mainboard/google/pit/mainboard.c index 64783ad..67d3b5d 100644 --- a/src/mainboard/google/pit/mainboard.c +++ b/src/mainboard/google/pit/mainboard.c @@ -34,6 +34,7 @@ #include <cpu/samsung/exynos5420/power.h> #include <cpu/samsung/exynos5420/i2c.h> #include <cpu/samsung/exynos5420/dp-core.h> +#include <ec/google/chromeec/ec.h>
#include "exynos5420.h"
@@ -57,8 +58,6 @@ static enum exynos5_gpio_pin bl_en = GPIO_X22; /* active high */
static void exynos_dp_bridge_setup(void) { - exynos_pinmux_dphpd(); - gpio_set_value(dp_pd_l, 1); gpio_cfg_pin(dp_pd_l, GPIO_OUTPUT); gpio_set_pull(dp_pd_l, GPIO_PULL_NONE); @@ -68,6 +67,8 @@ static void exynos_dp_bridge_setup(void) gpio_set_pull(dp_rst_l, GPIO_PULL_NONE); udelay(10); gpio_set_value(dp_rst_l, 1); + + gpio_cfg_pin(dp_hpd, GPIO_INPUT); }
static void exynos_dp_bridge_init(void) @@ -170,6 +171,35 @@ static void gpio_init(void) exynos_pinmux_i2c10(); }
+enum { + FET_CTRL_WAIT = 3 << 2, + FET_CTRL_ADENFET = 1 << 1, + FET_CTRL_ENFET = 1 << 0 +}; + +static void tps65090_thru_ec_fet_set(int index) +{ + uint8_t value = FET_CTRL_ADENFET | FET_CTRL_WAIT | FET_CTRL_ENFET; + + if (google_chromeec_i2c_xfer(0x48, 0xe + index, 1, &value, 1, 0)) { + printk(BIOS_ERR, + "Error sending i2c pass through command to EC.\n"); + return; + } +} + +static void lcd_vdd(void) +{ + /* Enable FET6, lcd panel */ + tps65090_thru_ec_fet_set(6); +} + +static void backlight_vdd(void) +{ + /* Enable FET1, backlight */ + tps65090_thru_ec_fet_set(1); +} + /* this happens after cpu_init where exynos resources are set */ static void mainboard_init(device_t dev) { @@ -193,7 +223,7 @@ static void mainboard_init(device_t dev) fb_addr = cbmem_find(CBMEM_ID_CONSOLE); set_vbe_mode_info_valid(&edid, (uintptr_t)fb_addr);
- // XXX Turn on the LCD power here. + lcd_vdd();
// FIXME: should timeout do { @@ -204,6 +234,7 @@ static void mainboard_init(device_t dev) for (dp_tries = 1; dp_tries <= MAX_DP_TRIES; dp_tries++) { exynos_dp_bridge_init(); if (exynos_dp_hotplug()) { + printk(BIOS_ERR, "Hotplug detect failed.\n"); exynos_dp_reset(); continue; } @@ -213,7 +244,7 @@ static void mainboard_init(device_t dev)
udelay(LCD_T3_DELAY_MS * 1000);
- // XXX Turn on the backlight power here. + backlight_vdd(); backlight_pwm(); backlight_en(); /* if we're here, we're successful */