[U-Boot] [PATCH 03/11] video: Add System-Mode configuration hook into mxsfb

Marek Vasut
2013-07-30T21:37:53Z

Add hook that allow configuring SmartLCD attached the MXS LCDIF
controller operating in System-Mode. This hook can be overriden
by a platform-specific SmartLCD programming routine, which writes
the SmartLCD specific values into it's registers.

Also, this patch makes sure the SYNC signals are off for the
SmartLCD case.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
---
drivers/video/mxsfb.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index dbc63a6..78709dd 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -34,6 +34,17 @@

static GraphicDevice panel;

+/**
+ * mxsfb_system_setup() - Fine-tune LCDIF configuration
+ *
+ * This function is used to adjust the LCDIF configuration. This is usually
+ * needed when driving the controller in System-Mode to operate an 8080 or
+ * 6800 connected SmartLCD.
+ */
+__weak void mxsfb_system_setup(void)
+{
+}
+
/*
* DENX M28EVK:
* setenv videomode
@@ -88,6 +99,9 @@ static void mxs_lcd_init(GraphicDevice *panel,

writel(valid_data << LCDIF_CTRL1_BYTE_PACKING_FORMAT_OFFSET,
&regs->hw_lcdif_ctrl1);
+
+ mxsfb_system_setup();
+
writel((mode->yres << LCDIF_TRANSFER_COUNT_V_COUNT_OFFSET) | mode->xres,
&regs->hw_lcdif_transfer_count);

@@ -115,8 +129,10 @@ static void mxs_lcd_init(GraphicDevice *panel,
/* Flush FIFO first */
writel(LCDIF_CTRL1_FIFO_CLEAR, &regs->hw_lcdif_ctrl1_set);

+#ifndef CONFIG_VIDEO_MXS_MODE_SYSTEM
/* Sync signals ON */
setbits_le32(&regs->hw_lcdif_vdctrl4, LCDIF_VDCTRL4_SYNC_SIGNALS_ON);
+#endif

/* FIFO cleared */
writel(LCDIF_CTRL1_FIFO_CLEAR, &regs->hw_lcdif_ctrl1_clr);
--
1.7.10.4