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authorSven Neumann <s.neumann@raumfeld.com>2011-05-25 13:37:32 +0200
committerEric Miao <eric.y.miao@gmail.com>2011-07-11 08:26:32 +0200
commita74fe1194b8da1dcee7529ba14999381bb9c25d9 (patch)
tree196eb3bb308c0c347aad9b569f7112a71082c6c6 /arch
parentARM: pxa/raumfeld: adapt to upcoming hardware change (diff)
downloadlinux-a74fe1194b8da1dcee7529ba14999381bb9c25d9.tar.xz
linux-a74fe1194b8da1dcee7529ba14999381bb9c25d9.zip
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-pxa/raumfeld.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/arch/arm/mach-pxa/raumfeld.c b/arch/arm/mach-pxa/raumfeld.c
index 8e5b3d8a86be..9caa5e5c8d94 100644
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -573,10 +573,10 @@ static struct pxafb_mode_info sharp_lq043t3dx02_mode = {
.xres = 480,
.yres = 272,
.bpp = 16,
- .hsync_len = 4,
+ .hsync_len = 41,
.left_margin = 2,
.right_margin = 1,
- .vsync_len = 1,
+ .vsync_len = 10,
.upper_margin = 3,
.lower_margin = 1,
.sync = 0,
@@ -596,30 +596,31 @@ static void __init raumfeld_lcd_init(void)
{
int ret;
- pxa_set_fb_info(NULL, &raumfeld_sharp_lcd_info);
-
- /* Hardware revision 2 has the backlight regulator controlled
- * by an LT3593, earlier and later devices use PWM for that. */
- if ((system_rev & 0xff) == 2) {
- platform_device_register(&raumfeld_lt3593_device);
- } else {
- mfp_cfg_t raumfeld_pwm_pin_config = GPIO17_PWM0_OUT;
- pxa3xx_mfp_config(&raumfeld_pwm_pin_config, 1);
- platform_device_register(&raumfeld_pwm_backlight_device);
- }
-
ret = gpio_request(GPIO_TFT_VA_EN, "display VA enable");
if (ret < 0)
pr_warning("Unable to request GPIO_TFT_VA_EN\n");
else
gpio_direction_output(GPIO_TFT_VA_EN, 1);
+ msleep(100);
+
ret = gpio_request(GPIO_DISPLAY_ENABLE, "display enable");
if (ret < 0)
pr_warning("Unable to request GPIO_DISPLAY_ENABLE\n");
else
gpio_direction_output(GPIO_DISPLAY_ENABLE, 1);
+ /* Hardware revision 2 has the backlight regulator controlled
+ * by an LT3593, earlier and later devices use PWM for that. */
+ if ((system_rev & 0xff) == 2) {
+ platform_device_register(&raumfeld_lt3593_device);
+ } else {
+ mfp_cfg_t raumfeld_pwm_pin_config = GPIO17_PWM0_OUT;
+ pxa3xx_mfp_config(&raumfeld_pwm_pin_config, 1);
+ platform_device_register(&raumfeld_pwm_backlight_device);
+ }
+
+ pxa_set_fb_info(NULL, &raumfeld_sharp_lcd_info);
platform_device_register(&pxa3xx_device_gcu);
}