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this patch adds features for supportting MIPI Interface and CPU mode to
s3c-fb.c<br>
<br>
for this, I added following features.<br>
. add struct fb_cmdmode<br>
- this structure would be used for cpu interface.<br>
. add interface_mode to struct s3c_fb_platdata.<br>
- this variable would be used to distinguishe whether CPU or RGB mode.<br>
. add two functions for cpu interface.<br>
- s3c_fb_set_trigger would be used for to send trigger signal to FIMD.<br>
- s3c_fb_is_i80_frame_done would be used to check framedone status.<br>
. add a function for setting timing.<br>
- I added this function because it have to distinguishe interfaces.<br>
(CPU or RGB mode)<br>
. add register definitions for using MIPI-DSI mode.<br>
<br>
Signed-off-by: InKi Dae <<a href="mailto:p.osciak@samsung.com">inki.dae@samsung.com</a>><br>
Signed-off-by: Kyungmin Park <<a
href="mailto:kyungmin.park@samsung.com">kyungmin.park@samsung.com</a>><br>
---<br>
<br>
<pre>diff --git a/arch/arm/plat-samsung/include/plat/fb.h b/arch/arm/plat-samsung/include/plat/fb.h
index 27d3b49..b0204f8 100644
--- a/arch/arm/plat-samsung/include/plat/fb.h
+++ b/arch/arm/plat-samsung/include/plat/fb.h
@@ -22,6 +22,23 @@
*/
#define S3C_FB_MAX_WIN (5)
+enum {
+ FIMD_VIDEO_MODE = 0,
+ FIMD_COMMAND_MODE
+};
+
+struct fb_cmdmode {
+ const char *name; /* optional */
+ u32 refresh; /* optional */
+ u32 xres;
+ u32 yres;
+ u32 pixclock;
+ u32 cs_setup;
+ u32 wr_setup;
+ u32 wr_act;
+ u32 wr_hold;
+};
+
/**
* struct s3c_fb_pd_win - per window setup data
* @win_mode: The display parameters to initialise (not for window 0)
@@ -30,6 +47,7 @@
*/
struct s3c_fb_pd_win {
struct fb_videomode win_mode;
+ struct fb_cmdmode cmd_mode;
unsigned short default_bpp;
unsigned short max_bpp;
@@ -42,6 +60,7 @@ struct s3c_fb_pd_win {
* @setup_gpio: Setup the external GPIO pins to the right state to transfer
* the data from the display system to the connected display
* device.
+ * @interface_mode: cpu mode or rgb mode.
* @vidcon0: The base vidcon0 values to control the panel data format.
* @vidcon1: The base vidcon1 values to control the panel data output.
* @win: The setup data for each hardware window, or NULL for unused.
@@ -57,6 +76,7 @@ struct s3c_fb_platdata {
void (*setup_gpio)(void);
struct s3c_fb_pd_win *win[S3C_FB_MAX_WIN];
+ u32 interface_mode;
u32 vidcon0;
u32 vidcon1;
@@ -91,4 +111,10 @@ extern void s5pc100_fb_gpio_setup_24bpp(void);
*/
extern void s5pv210_fb_gpio_setup_24bpp(void);
+struct fb_info;
+
+extern void s3c_fb_set_trigger(struct fb_info *info);
+
+extern int s3c_fb_is_i80_frame_done(struct fb_info *info);
+
#endif /* __PLAT_S3C_FB_H */
diff --git a/arch/arm/plat-samsung/include/plat/regs-fb-v4.h b/arch/arm/plat-samsung/include/plat/regs-fb-v4.h
index 0f43599..4d5954b 100644
--- a/arch/arm/plat-samsung/include/plat/regs-fb-v4.h
+++ b/arch/arm/plat-samsung/include/plat/regs-fb-v4.h
@@ -135,6 +135,22 @@
#define WPALCON (0x1A0)
+/* For CPU interface. */
+#define TRIGCON (0x1a4)
+#define TRGMODE_I80_ENABLE (1 << 0)
+#define SWTRGCMD_I80_TRIGGER (1 << 1)
+#define SWFRSTATUS_I80 (1 << 2)
+
+#define I80IFCONA0 (0x1b0)
+#define I80IFEN_ENABLE (1 << 0)
+#define RSPOL_HIGH (1 << 2)
+#define LCD_WR_HOLD(x) (((x) & 0xf) << 4)
+#define LCD_WR_ACT(x) (((x) & 0xf) << 8)
+#define LCD_WR_SETUP(x) (((x) & 0xf) << 12)
+#define LCD_CS_SETUP(x) (((x) & 0xf) << 16)
+
+#define I80IFCONB0 (0x1b8)
+
/* Palette control */
/* Note for S5PC100: you can still use those macros on WPALCON (aka WPALCON_L),
* but make sure that WPALCON_H W2PAL-W4PAL entries are zeroed out */
diff --git a/arch/arm/plat-samsung/include/plat/regs-fb.h b/arch/arm/plat-samsung/include/plat/regs-fb.h
index 0ef806e..70342aa 100644
--- a/arch/arm/plat-samsung/include/plat/regs-fb.h
+++ b/arch/arm/plat-samsung/include/plat/regs-fb.h
@@ -38,6 +38,7 @@
#define VIDCON0_VIDOUT_TV (0x1 << 26)
#define VIDCON0_VIDOUT_I80_LDI0 (0x2 << 26)
#define VIDCON0_VIDOUT_I80_LDI1 (0x3 << 26)
+#define VIDCON0_DSI_EN_ENABLE (1 << 30)
#define VIDCON0_L1_DATA_MASK (0x7 << 23)
#define VIDCON0_L1_DATA_SHIFT (23)
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index 9682ecc..28d34ef 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -255,6 +255,73 @@ static int s3c_fb_align_word(unsigned int bpp, unsigned int pix)
}
/**
+ * s3c_fb_set_trigger - fimd trigger based on cpu interface.
+ */
+void s3c_fb_set_trigger(struct fb_info *info)
+{
+ struct s3c_fb_win *win = info->par;
+ struct s3c_fb *sfb = win->parent;
+ void __iomem *regs = sfb->regs;
+ u32 reg = 0;
+
+ reg = readl(regs + TRIGCON);
+
+ reg |= TRGMODE_I80_ENABLE | SWTRGCMD_I80_TRIGGER;
+
+ writel(reg, regs + TRIGCON);
+}
+
+/**
+ * s3c_fb_is_i80_frame_done - get i80 frame done status.
+ */
+int s3c_fb_is_i80_frame_done(struct fb_info *info)
+{
+ struct s3c_fb_win *win = info->par;
+ struct s3c_fb *sfb = win->parent;
+ void __iomem *regs = sfb->regs;
+ u32 reg = 0;
+
+ reg = readl(regs + TRIGCON);
+
+ return (((reg & SWFRSTATUS_I80) == SWFRSTATUS_I80) ? 1 : 0);
+}
+
+/**
+ * s3c_fb_set_cpu_timing - set cpu timing.
+ */
+static void s3c_fb_set_timing(struct s3c_fb *sfb, struct fb_info *info)
+{
+ struct s3c_fb_win *win = info->par;
+ struct s3c_fb_pd_win *windata = win->windata;
+ struct fb_var_screeninfo *var = &info->var;
+ void __iomem *regs = sfb->regs;
+ u32 reg = 0;
+
+ if (sfb->pdata->interface_mode == FIMD_VIDEO_MODE) {
+ reg = VIDTCON0_VBPD(var->upper_margin - 1) |
+ VIDTCON0_VFPD(var->lower_margin - 1) |
+ VIDTCON0_VSPW(var->vsync_len - 1);
+
+ writel(reg, regs + VIDTCON0);
+
+ reg = VIDTCON1_HBPD(var->left_margin - 1) |
+ VIDTCON1_HFPD(var->right_margin - 1) |
+ VIDTCON1_HSPW(var->hsync_len - 1);
+
+ writel(reg, regs + VIDTCON1);
+ } else if (sfb->pdata->interface_mode == FIMD_COMMAND_MODE) {
+ reg = LCD_CS_SETUP(windata->cmd_mode.cs_setup) |
+ LCD_WR_SETUP(windata->cmd_mode.wr_setup) |
+ LCD_WR_ACT(windata->cmd_mode.wr_act) |
+ LCD_WR_HOLD(windata->cmd_mode.wr_hold) |
+ I80IFEN_ENABLE;
+
+ writel(reg, regs + I80IFCONA0);
+ } else
+ dev_warn(sfb->dev, "wrong interface type.\n");
+}
+
+/**
* s3c_fb_set_par() - framebuffer request to set new framebuffer state.
* @info: The framebuffer to change.
*
@@ -318,17 +385,7 @@ static int s3c_fb_set_par(struct fb_info *info)
data |= VIDCON0_ENVID | VIDCON0_ENVID_F;
writel(data, regs + VIDCON0);
- data = VIDTCON0_VBPD(var->upper_margin - 1) |
- VIDTCON0_VFPD(var->lower_margin - 1) |
- VIDTCON0_VSPW(var->vsync_len - 1);
-
- writel(data, regs + VIDTCON0);
-
- data = VIDTCON1_HBPD(var->left_margin - 1) |
- VIDTCON1_HFPD(var->right_margin - 1) |
- VIDTCON1_HSPW(var->hsync_len - 1);
-
- writel(data, regs + VIDTCON1);
+ s3c_fb_set_timing(sfb, info);
data = VIDTCON2_LINEVAL(var->yres - 1) |
VIDTCON2_HOZVAL(var->xres - 1);
@@ -744,7 +801,8 @@ static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no,
struct s3c_fb_win **res)
{
struct fb_var_screeninfo *var;
- struct fb_videomode *initmode;
+ struct fb_videomode *videomode;
+ struct fb_cmdmode *cmdmode;
struct s3c_fb_pd_win *windata;
struct s3c_fb_win *win;
struct fb_info *fbinfo;
@@ -763,11 +821,20 @@ static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no,
}
windata = sfb->pdata->win[win_no];
- initmode = &windata->win_mode;
WARN_ON(windata->max_bpp == 0);
- WARN_ON(windata->win_mode.xres == 0);
- WARN_ON(windata->win_mode.yres == 0);
+
+ if (sfb->pdata->interface_mode == FIMD_VIDEO_MODE) {
+ WARN_ON(windata->win_mode.xres == 0);
+ WARN_ON(windata->win_mode.yres == 0);
+
+ videomode = &windata->win_mode;
+ } else {
+ WARN_ON(windata->cmd_mode.xres == 0);
+ WARN_ON(windata->cmd_mode.yres == 0);
+
+ cmdmode = &windata->cmd_mode;
+ }
win = fbinfo->par;
var = &fbinfo->var;
@@ -777,18 +844,19 @@ static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no,
win->index = win_no;
win->palette_buffer = (u32 *)(win + 1);
- ret = s3c_fb_alloc_memory(sfb, win);
- if (ret) {
- dev_err(sfb->dev, "failed to allocate display memory\n");
- return ret;
+ /* setup the initial video or cpu mode from the window */
+ if (sfb->pdata->interface_mode == FIMD_VIDEO_MODE)
+ fb_videomode_to_var(&fbinfo->var, videomode);
+ else {
+ var->xres = cmdmode->xres;
+ var->yres = cmdmode->yres;
+ var->xres_virtual = cmdmode->xres;
+ var->yres_virtual = cmdmode->yres;
+ var->xoffset = 0;
+ var->yoffset = 0;
+ var->pixclock = cmdmode->pixclock;
}
- /* setup the r/b/g positions for the window's palette */
- s3c_fb_init_palette(win_no, &win->palette);
-
- /* setup the initial video mode from the window */
- fb_videomode_to_var(&fbinfo->var, initmode);
-
fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
fbinfo->fix.accel = FB_ACCEL_NONE;
fbinfo->var.activate = FB_ACTIVATE_NOW;
@@ -798,6 +866,15 @@ static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no,
fbinfo->flags = FBINFO_FLAG_DEFAULT;
fbinfo->pseudo_palette = &win->pseudo_palette;
+ ret = s3c_fb_alloc_memory(sfb, win);
+ if (ret) {
+ dev_err(sfb->dev, "failed to allocate display memory\n");
+ return ret;
+ }
+
+ /* setup the r/b/g positions for the window's palette */
+ s3c_fb_init_palette(win_no, &win->palette);
+
/* prepare to actually start the framebuffer */
ret = s3c_fb_check_var(&fbinfo->var, fbinfo);
</pre>
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