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-rw-r--r--drivers/video/am335x-fb.c13
-rw-r--r--drivers/video/am335x-fb.h9
2 files changed, 15 insertions, 7 deletions
diff --git a/drivers/video/am335x-fb.c b/drivers/video/am335x-fb.c
index ab9894102d..6f956499d7 100644
--- a/drivers/video/am335x-fb.c
+++ b/drivers/video/am335x-fb.c
@@ -127,6 +127,12 @@ int am335xfb_init(struct am335x_lcdpanel *panel)
memset((void *)gd->fb_base, 0, 0x20);
*(unsigned int *)gd->fb_base = 0x4000;
+ /* turn ON display through powercontrol function if accessible */
+ if (0 != panel->panel_power_ctrl)
+ panel->panel_power_ctrl(1);
+
+ debug("am335x-fb: wait for stable power ...\n");
+ mdelay(panel->pup_delay);
lcdhw->clkc_enable = LCD_CORECLKEN | LCD_LIDDCLKEN | LCD_DMACLKEN;
lcdhw->raster_ctrl = 0;
lcdhw->ctrl = LCD_CLK_DIVISOR(panel->pxl_clk_div) | LCD_RASTER_MODE;
@@ -159,11 +165,8 @@ int am335xfb_init(struct am335x_lcdpanel *panel)
gd->fb_base += 0x20; /* point fb behind palette */
- /* turn ON display through powercontrol function if accessible */
- if (0 != panel->panel_power_ctrl) {
- mdelay(panel->pon_delay);
- panel->panel_power_ctrl(1);
- }
+ debug("am335x-fb: waiting picture to be stable.\n.");
+ mdelay(panel->pon_delay);
return 0;
}
diff --git a/drivers/video/am335x-fb.h b/drivers/video/am335x-fb.h
index 8a0b131495..7f799d1f31 100644
--- a/drivers/video/am335x-fb.h
+++ b/drivers/video/am335x-fb.h
@@ -55,9 +55,14 @@ struct am335x_lcdpanel {
unsigned int vsw; /* Vertical Sync Pulse Width */
unsigned int pxl_clk_div; /* Pixel clock divider*/
unsigned int pol; /* polarity of sync, clock signals */
+ unsigned int pup_delay; /*
+ * time in ms after power on to
+ * initialization of lcd-controller
+ * (VCC ramp up time)
+ */
unsigned int pon_delay; /*
- * time in ms for turning on lcd after
- * initializing lcd-controller
+ * time in ms after initialization of
+ * lcd-controller (pic stabilization)
*/
void (*panel_power_ctrl)(int); /* fp for power on/off display */
};
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