Hi Simon,
The backlight uses FETs on the TPS65090. Enable this so that the display is visible.
Signed-off-by: Simon Glass sjg@chromium.org
board/samsung/smdk5250/exynos5-dt.c | 90 +++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+)
diff --git a/board/samsung/smdk5250/exynos5-dt.c b/board/samsung/smdk5250/exynos5-dt.c index c83b034..a0ae641 100644 --- a/board/samsung/smdk5250/exynos5-dt.c +++ b/board/samsung/smdk5250/exynos5-dt.c @@ -20,6 +20,7 @@ #include <asm/arch/sromc.h> #include <power/pmic.h> #include <power/max77686_pmic.h> +#include <power/tps65090_pmic.h> #include <tmu.h>
DECLARE_GLOBAL_DATA_PTR; @@ -60,6 +61,52 @@ int checkboard(void) #endif
#ifdef CONFIG_LCD +static int board_dp_bridge_setup(void) +{
- struct exynos5_gpio_part1 *gpio1 =
(struct exynos5_gpio_part1*)samsung_get_base_gpio_part1();
- const int MAX_TRIES = 10;
- int num_tries;
- debug("%s\n", __func__);
- /* Setup the GPIOs */
- /* PD is ACTIVE_LOW, and initially de-asserted */
- s5p_gpio_set_pull(&gpio1->y2, 5, GPIO_PULL_NONE);
- s5p_gpio_direction_output(&gpio1->y2, 5, 1);
- /* Reset is ACTIVE_LOW */
- s5p_gpio_set_pull(&gpio1->x1, 5, GPIO_PULL_NONE);
- s5p_gpio_direction_output(&gpio1->x1, 5, 0);
- udelay(10);
- s5p_gpio_set_value(&gpio1->x1, 5, 1);
- s5p_gpio_direction_input(&gpio1->x0, 7);
- /*
* We need to wait for 90ms after bringing up the bridgesince there
* is a phantom "high" on the HPD chip during its bootup.The phantom
* high comes within 7ms of de-asserting PD and persists forat least
* 15ms. The real high comes roughly 50ms after PD isde-asserted. The
* phantom high makes it hard for us to know when the NXPchip is up.
*/- mdelay(90);
- for (num_tries = 0; num_tries < MAX_TRIES; num_tries++) {
/* Check HPD. If it's high, we're all good. */if (s5p_gpio_get_value(&gpio1->x0, 7))return 0;debug("%s: eDP bridge failed to come up; try %d of%d\n",
__func__, num_tries, MAX_TRIES);- }
- /* Immediately go into bridge reset if the hp line is not
high */
- return -ENODEV;
+}
void exynos_cfg_lcd_gpio(void) { struct exynos5_gpio_part1 *gpio1 = @@ -81,4 +128,47 @@ void exynos_set_dp_phy(unsigned int onoff) { set_dp_phy_ctrl(onoff); }
+void exynos_backlight_on(unsigned int onoff) +{
- debug("%s(%u)\n", __func__, onoff);
- if (onoff) {
+#ifdef CONFIG_POWER_TPS65090
struct exynos5_gpio_part1 *gpio1 =(struct exynos5_gpio_part1 *)samsung_get_base_gpio_part1();
int ret;ret = tps65090_fet_enable(1); /* Enable FET1,backlight */
if (ret)return;/* T5 in the LCD timing spec (defined as > 10ms) */mdelay(10);/* board_dp_backlight_pwm */s5p_gpio_direction_output(&gpio1->b2, 0, 1);/* T6 in the LCD timing spec (defined as > 10ms) */mdelay(10);/* board_dp_backlight_en */s5p_gpio_direction_output(&gpio1->x3, 0, 1);+#endif
- }
+}
+void exynos_lcd_power_on(void) +{
- debug("%s\n", __func__);
+#ifdef CONFIG_POWER_TPS65090
- /* board_dp_lcd_vdd */
- tps65090_fet_enable(6); /* Enable FET6, lcd panel */
+#endif
- board_dp_bridge_setup();
+}
#endif
Reviewed-by: Lukasz Majewski l.majewski@samsung.com