ARM: pxa/raumfeld: display initialisation fixes
The display requires some milliseconds between GPIO_TFT_VA_EN and GPIO_DISPLAY_ENABLE. Reorder initialisation to comply with the display spec. Also tune timings for better compliance with the spec. Signed-off-by: Sven Neumann <s.neumann@raumfeld.com> Acked-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
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@ -573,10 +573,10 @@ static struct pxafb_mode_info sharp_lq043t3dx02_mode = {
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.xres = 480,
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.yres = 272,
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.bpp = 16,
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.hsync_len = 4,
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.hsync_len = 41,
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.left_margin = 2,
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.right_margin = 1,
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.vsync_len = 1,
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.vsync_len = 10,
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.upper_margin = 3,
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.lower_margin = 1,
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.sync = 0,
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@ -596,7 +596,19 @@ static void __init raumfeld_lcd_init(void)
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{
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int ret;
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pxa_set_fb_info(NULL, &raumfeld_sharp_lcd_info);
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ret = gpio_request(GPIO_TFT_VA_EN, "display VA enable");
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if (ret < 0)
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pr_warning("Unable to request GPIO_TFT_VA_EN\n");
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else
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gpio_direction_output(GPIO_TFT_VA_EN, 1);
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msleep(100);
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ret = gpio_request(GPIO_DISPLAY_ENABLE, "display enable");
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if (ret < 0)
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pr_warning("Unable to request GPIO_DISPLAY_ENABLE\n");
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else
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gpio_direction_output(GPIO_DISPLAY_ENABLE, 1);
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/* Hardware revision 2 has the backlight regulator controlled
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* by an LT3593, earlier and later devices use PWM for that. */
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@ -608,18 +620,7 @@ static void __init raumfeld_lcd_init(void)
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platform_device_register(&raumfeld_pwm_backlight_device);
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}
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ret = gpio_request(GPIO_TFT_VA_EN, "display VA enable");
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if (ret < 0)
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pr_warning("Unable to request GPIO_TFT_VA_EN\n");
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else
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gpio_direction_output(GPIO_TFT_VA_EN, 1);
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ret = gpio_request(GPIO_DISPLAY_ENABLE, "display enable");
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if (ret < 0)
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pr_warning("Unable to request GPIO_DISPLAY_ENABLE\n");
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else
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gpio_direction_output(GPIO_DISPLAY_ENABLE, 1);
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pxa_set_fb_info(NULL, &raumfeld_sharp_lcd_info);
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platform_device_register(&pxa3xx_device_gcu);
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}
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