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zen/zenxfi: fix backlight white flash on backlight on

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Change-Id: If028a208bd10f46dbe25e4aade085ba7ba13d7be
This commit is contained in:
Amaury Pouly 2017-08-27 15:53:22 +02:00
parent b13f6e5b67
commit 7ce764cdc3
1 changed files with 7 additions and 9 deletions
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16
firmware/target/arm/imx233/creative-zen/backlight-zen.c
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@ -27,6 +27,7 @@
#include "uartdbg-imx233.h" #include "uartdbg-imx233.h"
#include "pinctrl-imx233.h" #include "pinctrl-imx233.h"
#include "pwm-imx233.h" #include "pwm-imx233.h"
#include "kernel.h"
void backlight_hw_brightness(int level) void backlight_hw_brightness(int level)
{ {
@ -37,15 +38,9 @@ void backlight_hw_brightness(int level)
lcd_set_contrast(level); lcd_set_contrast(level);
#else #else
unsigned val = (level + 200) * level / 1000; unsigned val = (level + 200) * level / 1000;
if(level != 0) for(unsigned mask = 0x10; mask; mask >>= 1)
{ imx233_uartdbg_send((val & mask) ? 0xff : 0xf8);
for(unsigned mask = 0x10; mask; mask >>= 1) imx233_uartdbg_send(0);
imx233_uartdbg_send((val & mask) ? 0xff : 0xf8);
imx233_uartdbg_send(0);
imx233_pinctrl_set_gpio(1, 12, true);
}
else
imx233_pinctrl_set_gpio(1, 12, false);
#endif #endif
} }
@ -64,7 +59,9 @@ void backlight_hw_on(void)
{ {
#ifdef HAVE_LCD_ENABLE #ifdef HAVE_LCD_ENABLE
lcd_enable(true); /* power on lcd + visible display */ lcd_enable(true); /* power on lcd + visible display */
sleep(HZ / 10); /* make sure screen is not white anymore */
#endif #endif
imx233_pinctrl_set_gpio(1, 12, true);
/* restore the previous backlight level */ /* restore the previous backlight level */
backlight_hw_brightness(backlight_brightness); backlight_hw_brightness(backlight_brightness);
} }
@ -73,6 +70,7 @@ void backlight_hw_off(void)
{ {
/* there is no real on/off but we can set to 0 brightness */ /* there is no real on/off but we can set to 0 brightness */
backlight_hw_brightness(0); backlight_hw_brightness(0);
imx233_pinctrl_set_gpio(1, 12, false);
#ifdef HAVE_LCD_ENABLE #ifdef HAVE_LCD_ENABLE
lcd_enable(false); /* power off visible display */ lcd_enable(false); /* power off visible display */
#endif #endif