diff options
| author | Gerard Salvatella <gerard.salvatella@toradex.com> | 2018-08-31 09:47:44 +0200 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2018-09-13 14:06:50 +0200 |
| commit | 5717b9a050a123d3e1eafa7c0883810847e74d2c (patch) | |
| tree | 679d577c617588db0b29754a0a70619ec2dd895f /board/toradex/colibri_imx6/colibri_imx6.c | |
| parent | 71c46c0c7531467a8387d3a686aef66397abd94c (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>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Diffstat (limited to 'board/toradex/colibri_imx6/colibri_imx6.c')
| -rw-r--r-- | board/toradex/colibri_imx6/colibri_imx6.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/board/toradex/colibri_imx6/colibri_imx6.c b/board/toradex/colibri_imx6/colibri_imx6.c index 5a3678e506..f97e292f01 100644 --- a/board/toradex/colibri_imx6/colibri_imx6.c +++ b/board/toradex/colibri_imx6/colibri_imx6.c @@ -507,8 +507,6 @@ static void enable_rgb(struct display_info_t const *dev) imx_iomux_v3_setup_multiple_pads( rgb_pads, ARRAY_SIZE(rgb_pads)); - gpio_direction_output(RGB_BACKLIGHT_GP, 1); - gpio_direction_output(RGB_BACKLIGHTPWM_GP, 0); } static int detect_default(struct display_info_t const *dev) @@ -634,6 +632,15 @@ static void setup_display(void) gpio_direction_output(RGB_BACKLIGHTPWM_GP, 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) |