diff options
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/pit/mainboard.c | 71 |
1 files changed, 17 insertions, 54 deletions
diff --git a/src/mainboard/google/pit/mainboard.c b/src/mainboard/google/pit/mainboard.c index 67d3b5d0ab..54ea042bd5 100644 --- a/src/mainboard/google/pit/mainboard.c +++ b/src/mainboard/google/pit/mainboard.c @@ -34,7 +34,9 @@ #include <cpu/samsung/exynos5420/power.h> #include <cpu/samsung/exynos5420/i2c.h> #include <cpu/samsung/exynos5420/dp-core.h> +#include <drivers/parade/ps8625/ps8625.h> #include <ec/google/chromeec/ec.h> +#include <stdlib.h> #include "exynos5420.h" @@ -56,7 +58,7 @@ static enum exynos5_gpio_pin dp_hpd = GPIO_X26; /* active high */ static enum exynos5_gpio_pin bl_pwm = GPIO_B20; /* active high */ static enum exynos5_gpio_pin bl_en = GPIO_X22; /* active high */ -static void exynos_dp_bridge_setup(void) +static void parade_dp_bridge_setup(void) { gpio_set_value(dp_pd_l, 1); gpio_cfg_pin(dp_pd_l, GPIO_OUTPUT); @@ -69,37 +71,19 @@ static void exynos_dp_bridge_setup(void) gpio_set_value(dp_rst_l, 1); gpio_cfg_pin(dp_hpd, GPIO_INPUT); -} -static void exynos_dp_bridge_init(void) -{ - /* De-assert PD (and possibly RST) to power up the bridge */ + /* De-assert PD (and possibly RST) to power up the bridge. */ gpio_set_value(dp_pd_l, 1); gpio_set_value(dp_rst_l, 1); - /* - * We need to wait for 90ms after bringing up the bridge since - * there is a phantom "high" on the HPD chip during its - * bootup. The phantom high comes within 7ms of de-asserting - * PD and persists for at least 15ms. The real high comes - * roughly 50ms after PD is de-asserted. The phantom high - * makes it hard for us to know when the NXP chip is up. - */ - udelay(90000); -} + /* Hang around for the bridge to come up. */ + mdelay(40); -static int exynos_dp_hotplug(void) -{ - /* Check HPD. If it's high, we're all good. */ - return gpio_get_value(dp_hpd) ? 0 : 1; -} + /* Configure the bridge chip. */ + exynos_pinmux_i2c7(); + i2c_init(7, 100000, 0x00); -static void exynos_dp_reset(void) -{ - gpio_set_value(dp_pd_l, 0); - gpio_set_value(dp_rst_l, 0); - /* paranoid delay period (300ms) */ - udelay(300 * 1000); + parade_ps8625_bridge_setup(7, 0x48); } /* @@ -203,7 +187,6 @@ static void backlight_vdd(void) /* this happens after cpu_init where exynos resources are set */ static void mainboard_init(device_t dev) { - int dp_tries; struct s5p_dp_device dp_device = { .base = (struct exynos5_dp *)EXYNOS5420_DP1_BASE, .video_info = &dp_video_info, @@ -225,34 +208,14 @@ static void mainboard_init(device_t dev) lcd_vdd(); - // FIXME: should timeout - do { - udelay(50); - } while (!exynos_dp_hotplug()); - - exynos_dp_bridge_setup(); - 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; - } - - if (dp_controller_init(&dp_device)) - continue; - - udelay(LCD_T3_DELAY_MS * 1000); - - backlight_vdd(); - backlight_pwm(); - backlight_en(); - /* if we're here, we're successful */ - break; - } + parade_dp_bridge_setup(); + dp_controller_init(&dp_device); + + udelay(LCD_T3_DELAY_MS * 1000); - if (dp_tries > MAX_DP_TRIES) - printk(BIOS_ERR, "%s: Failed to set up displayport\n", __func__); + backlight_vdd(); + backlight_pwm(); + backlight_en(); // Uncomment to get excessive GPIO output: // gpio_info(); |