diff options
| author | Gerard Salvatella <gerard.salvatella@toradex.com> | 2018-11-19 15:54:10 +0100 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2019-02-20 09:01:45 -0700 |
| commit | a3c9021771608f5b514c75874fa0d8fbee2873d6 (patch) | |
| tree | de9dd8d381fdcecc7c8be000b7edc8782febcad1 /board/toradex/colibri_imx7/colibri_imx7.c | |
| parent | 146680003a776d9217d6d351ca4186f416a77226 (diff) | |
board: toradex: turn off lcd backlight before OS handover
U-Boot typically tears down the display controller before handing
control over to Linux. On LCD displays disabling pixel clock leads to a
fading out effect with vertical/horizontal lines. Make sure to disable
back light before booting Linux.
Signed-off-by: Gerard Salvatella <gerard.salvatella@toradex.com>
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'board/toradex/colibri_imx7/colibri_imx7.c')
| -rw-r--r-- | board/toradex/colibri_imx7/colibri_imx7.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/board/toradex/colibri_imx7/colibri_imx7.c b/board/toradex/colibri_imx7/colibri_imx7.c index 392fda92da..61bf8bfd58 100644 --- a/board/toradex/colibri_imx7/colibri_imx7.c +++ b/board/toradex/colibri_imx7/colibri_imx7.c @@ -150,6 +150,15 @@ static int setup_lcd(void) } #endif +/* + * Backlight off before OS handover + */ +void board_preboot_os(void) +{ + gpio_direction_output(GPIO_PWM_A, 1); + gpio_direction_output(GPIO_BL_ON, 0); +} + #ifdef CONFIG_FEC_MXC static iomux_v3_cfg_t const fec1_pads[] = { #ifndef CONFIG_COLIBRI_IMX7_EXT_PHYCLK |