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omap3_dss: add optional framebuffer

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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: trini@ti.com
cc: s-paulraj@ti.com
cc: khasim@ti.com
Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
This commit is contained in:
Jeroen Hofstee 2012-05-18 00:51:00 +00:00 committed by Anatolij Gustschin
parent f714b0a911
commit d9c13aac14
3 changed files with 80 additions and 3 deletions
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37
arch/arm/include/asm/arch-omap3/dss.h
View file

@ -31,12 +31,18 @@
/*
* DSS Base Registers
*/
#define OMAP3_DSS_BASE 0x48050040
#define OMAP3_DISPC_BASE 0x48050440
#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 +50,13 @@ 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 +73,18 @@ 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 +148,13 @@ 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 +193,7 @@ struct panel_config {
u32 data_lines;
u32 load_mode;
u32 panel_color;
void *frame_buffer;
};
/*

2
drivers/video/Makefile
View file

@ -42,7 +42,7 @@ 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

44
drivers/video/omap3_dss.c
View file

@ -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 +145,31 @@ 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 = &dssfb;
struct dispc_regs *dispc = (struct dispc_regs *) OMAP3_DISPC_BASE;
if (board_video_init() || !readl(&dispc->gfx_ba0))
return NULL;
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