[U-Boot] [PATCH 1/2] omap3_dss: add optional framebuffer
Jeroen Hofstee
jeroen at myspectrum.nl
Wed May 16 21:04:57 CEST 2012
From: Jeroen Hofstee <jhofstee at victronenergy.com>
The beagle board uses the background color to show an orange screen during
startup. This patch adds the ability to add a frame buffer, with the
intention not to break the beagle board use case (I don't have one).
videomodes.c is not used. Scrolling depends on this patch:
http://patchwork.ozlabs.org/patch/155662/
cc: s-paulraj at ti.com
cc: khasim at ti.com
Signed-off-by: Jeroen Hofstee <jhofstee at victronenergy.com>
---
arch/arm/include/asm/arch-omap3/dss.h | 41 ++++++++++++++++++++++++++----
drivers/video/Makefile | 2 +-
drivers/video/omap3_dss.c | 45 +++++++++++++++++++++++++++++++++
3 files changed, 82 insertions(+), 6 deletions(-)
diff --git a/arch/arm/include/asm/arch-omap3/dss.h b/arch/arm/include/asm/arch-omap3/dss.h
index 4c56e5e..ae994ee 100644
--- a/arch/arm/include/asm/arch-omap3/dss.h
+++ b/arch/arm/include/asm/arch-omap3/dss.h
@@ -28,15 +28,19 @@
#ifndef DSS_H
#define DSS_H
-/*
- * DSS Base Registers
- */
-#define OMAP3_DSS_BASE 0x48050040
-#define OMAP3_DISPC_BASE 0x48050440
+/* DSS Base Registers */
+#define OMAP3_DSS_BASE 0x48050000
+#define OMAP3_DISPC_BASE 0x48050400
#define OMAP3_VENC_BASE 0x48050C00
/* DSS Registers */
struct dss_regs {
+ u32 revision; /* 0x00 */
+ u8 res1[12]; /* 0x04 */
+ u32 sysconfig; /* 0x10 */
+ u32 sysstatus; /* 0x14 */
+ u32 irqstatus; /* 0x18 */
+ u8 res2[36]; /* 0x1C */
u32 control; /* 0x40 */
u32 sdi_control; /* 0x44 */
u32 pll_control; /* 0x48 */
@@ -44,6 +48,13 @@ struct dss_regs {
/* DISPC Registers */
struct dispc_regs {
+ u32 revision; /* 0x00 */
+ u8 res1[12]; /* 0x04 */
+ u32 sysconfig; /* 0x10 */
+ u32 sysstatus; /* 0x14 */
+ u32 irqstatus; /* 0x18 */
+ u32 irqenable; /* 0x1C */
+ u8 res2[32]; /* 0x20 */
u32 control; /* 0x40 */
u32 config; /* 0x44 */
u32 reserve_2; /* 0x48 */
@@ -60,6 +71,18 @@ struct dispc_regs {
u32 global_alpha; /* 0x74 */
u32 size_dig; /* 0x78 */
u32 size_lcd; /* 0x7C */
+ u32 gfx_ba0; /* 0x80 */
+ u32 gfx_ba1; /* 0x84 */
+ u32 gfx_position; /* 0x88 */
+ u32 gfx_size; /* 0x8C */
+ u8 unused[16]; /* 0x90 */
+ u32 gfx_attributes; /* 0xA0 */
+ u32 gfx_fifo_threshold; /* 0xA4 */
+ u32 gfx_fifo_size_status; /* 0xA8 */
+ u32 gfx_row_inc; /* 0xAC */
+ u32 gfx_pixel_inc; /* 0xB0 */
+ u32 gfx_window_skip; /* 0xB4 */
+ u32 gfx_table_ba; /* 0xB8 */
};
/* VENC Registers */
@@ -123,6 +146,13 @@ struct venc_regs {
#define TFTSTN_SHIFT 3
#define DATALINES_SHIFT 8
+#define GFX_ENABLE 1
+#define GFX_FORMAT_SHIFT 1
+#define LOADMODE_SHIFT 1
+
+#define DSS_SOFTRESET (1 << 1)
+#define DSS_RESETDONE 1
+
/* Enabling Display controller */
#define LCD_ENABLE 1
#define DIG_ENABLE (1 << 1)
@@ -161,6 +191,7 @@ struct panel_config {
u32 data_lines;
u32 load_mode;
u32 panel_color;
+ void *frame_buffer;
};
/*
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 6252f6a..02aa032 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -38,7 +38,7 @@ COBJS-$(CONFIG_VIDEO_MB862xx) += mb862xx.o videomodes.o
COBJS-$(CONFIG_VIDEO_MB86R0xGDC) += mb86r0xgdc.o videomodes.o
COBJS-$(CONFIG_VIDEO_MX3) += mx3fb.o videomodes.o
COBJS-$(CONFIG_VIDEO_MX5) += mxc_ipuv3_fb.o ipu_common.o ipu_disp.o
-COBJS-$(CONFIG_VIDEO_OMAP3) += omap3_dss.o videomodes.o
+COBJS-$(CONFIG_VIDEO_OMAP3) += omap3_dss.o
COBJS-$(CONFIG_VIDEO_SED13806) += sed13806.o
COBJS-$(CONFIG_VIDEO_SM501) += sm501.o
COBJS-$(CONFIG_VIDEO_SMI_LYNXEM) += smiLynxEM.o videomodes.o
diff --git a/drivers/video/omap3_dss.c b/drivers/video/omap3_dss.c
index b322cc3..9245c06 100644
--- a/drivers/video/omap3_dss.c
+++ b/drivers/video/omap3_dss.c
@@ -28,6 +28,7 @@
#include <common.h>
#include <asm/io.h>
#include <asm/arch/dss.h>
+#include <video_fb.h>
/*
* Configure VENC for a given Mode (NTSC / PAL)
@@ -105,6 +106,11 @@ void omap3_dss_venc_config(const struct venc_regs *venc_cfg,
void omap3_dss_panel_config(const struct panel_config *panel_cfg)
{
struct dispc_regs *dispc = (struct dispc_regs *) OMAP3_DISPC_BASE;
+ struct dss_regs *dss = (struct dss_regs *) OMAP3_DSS_BASE;
+
+ writel(DSS_SOFTRESET, &dss->sysconfig);
+ while (!(readl(&dss->sysstatus) & DSS_RESETDONE))
+ ;
writel(panel_cfg->timing_h, &dispc->timing_h);
writel(panel_cfg->timing_v, &dispc->timing_v);
@@ -115,6 +121,16 @@ void omap3_dss_panel_config(const struct panel_config *panel_cfg)
writel(((panel_cfg->panel_type << TFTSTN_SHIFT) |
(panel_cfg->data_lines << DATALINES_SHIFT)), &dispc->control);
writel(panel_cfg->panel_color, &dispc->default_color0);
+ writel((u32) panel_cfg->frame_buffer, &dispc->gfx_ba0);
+
+ if (!panel_cfg->frame_buffer)
+ return;
+
+ writel(panel_cfg->load_mode << LOADMODE_SHIFT, &dispc->config);
+ writel(8 << GFX_FORMAT_SHIFT | GFX_ENABLE, &dispc->gfx_attributes);
+ writel(1, &dispc->gfx_row_inc);
+ writel(1, &dispc->gfx_pixel_inc);
+ writel(panel_cfg->lcd_size, &dispc->gfx_size);
}
/*
@@ -129,3 +145,32 @@ void omap3_dss_enable(void)
l |= DISPC_ENABLE;
writel(l, &dispc->control);
}
+
+#ifdef CONFIG_CFB_CONSOLE
+int __board_video_init(void)
+{
+ return -1;
+}
+
+int board_video_init(void)
+ __attribute__((weak, alias("__board_video_init")));
+
+void *video_hw_init(void)
+{
+ static GraphicDevice dssfb;
+ GraphicDevice *pGD = (GraphicDevice *) &dssfb;
+ struct dispc_regs *dispc = (struct dispc_regs *) OMAP3_DISPC_BASE;
+
+ if (board_video_init() || !readl(&dispc->gfx_ba0))
+ return NULL;
+
+ memset(pGD, 0, sizeof(GraphicDevice));
+ pGD->winSizeX = (readl(&dispc->size_lcd) & 0x7FF) + 1;
+ pGD->winSizeY = ((readl(&dispc->size_lcd) >> 16) & 0x7FF) + 1;
+ pGD->gdfBytesPP = 4;
+ pGD->gdfIndex = GDF_32BIT_X888RGB;
+ pGD->frameAdrs = readl(&dispc->gfx_ba0);
+
+ return pGD;
+}
+#endif
--
1.7.9.5
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