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/apalis_imx6/apalis_imx6.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/apalis_imx6/apalis_imx6.c')
| -rw-r--r-- | board/toradex/apalis_imx6/apalis_imx6.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/board/toradex/apalis_imx6/apalis_imx6.c b/board/toradex/apalis_imx6/apalis_imx6.c index 368db9c488..d11207c7f4 100644 --- a/board/toradex/apalis_imx6/apalis_imx6.c +++ b/board/toradex/apalis_imx6/apalis_imx6.c @@ -745,6 +745,15 @@ static void setup_display(void) gpio_direction_output(RGB_BACKLIGHTPWM_OE, 0); gpio_direction_output(RGB_BACKLIGHT_GP, 1); } + +/* + * Backlight off before OS handover + */ +void board_preboot_os(void) +{ + gpio_direction_output(RGB_BACKLIGHTPWM_GP, 1); + gpio_direction_output(RGB_BACKLIGHT_GP, 0); +} #endif /* defined(CONFIG_VIDEO_IPUV3) */ int board_early_init_f(void) |