diff options
| author | Petr Cvek <petr.cvek@tul.cz> | 2015-09-28 23:16:14 +0200 |
|---|---|---|
| committer | Robert Jarzmik <robert.jarzmik@free.fr> | 2015-10-14 23:06:55 +0200 |
| commit | fa5407ad9cd9aa41e00102073958475a89ac5456 (patch) | |
| tree | 4801d7e49ecfbbc2b47f66c32aa114093a4a4dd9 /arch | |
| parent | ARM: pxa: magician: Rename abstract LCD GPIOs (diff) | |
| download | linux-fa5407ad9cd9aa41e00102073958475a89ac5456.tar.xz linux-fa5407ad9cd9aa41e00102073958475a89ac5456.zip | |
ARM: pxa: magician: Optimize powerup delays for Samsung LCD
Delays for the Samsung LCD are greater than needed. These values were
extracted from a datasheet.
Signed-off-by: Petr Cvek <petr.cvek@tul.cz>
Acked-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-pxa/magician.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c index f52351a389ef..4846f5a70696 100644 --- a/arch/arm/mach-pxa/magician.c +++ b/arch/arm/mach-pxa/magician.c @@ -299,21 +299,19 @@ static void samsung_lcd_power(int on, struct fb_var_screeninfo *si) gpio_set_value(GPIO75_MAGICIAN_SAMSUNG_POWER, 1); else gpio_set_value(EGPIO_MAGICIAN_LCD_POWER, 1); - mdelay(10); + mdelay(6); gpio_set_value(GPIO106_MAGICIAN_LCD_DCDC_NRESET, 1); - mdelay(10); + mdelay(6); /* Avdd -> Voff >5ms */ gpio_set_value(GPIO104_MAGICIAN_LCD_VOFF_EN, 1); - mdelay(30); + mdelay(16); /* Voff -> Von >(5+10)ms */ gpio_set_value(GPIO105_MAGICIAN_LCD_VON_EN, 1); - mdelay(10); } else { - mdelay(10); gpio_set_value(GPIO105_MAGICIAN_LCD_VON_EN, 0); - mdelay(30); + mdelay(16); gpio_set_value(GPIO104_MAGICIAN_LCD_VOFF_EN, 0); - mdelay(10); + mdelay(6); gpio_set_value(GPIO106_MAGICIAN_LCD_DCDC_NRESET, 0); - mdelay(10); + mdelay(6); if (system_rev < 3) gpio_set_value(GPIO75_MAGICIAN_SAMSUNG_POWER, 0); else |