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ARM: S5PV210: Add MIPI-DSI support.

PATCH New InKi Dae 2 participants 4 messages Jul 7, 2010

Subsystems (5)
Arm (32-bit) Arm sub-architectures Framebuffer layer Arm Samsung Exynos +1 more subsystems
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InKi Dae

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#0 lore raw

v2 cover ARM: S5PV210: Add MIPI-DSI support.

Hello all,

This patch is for MIPI-DSI controller based on S5PV210 (or S5PC110).

this version corrects some problems Ben pointed out.

v1 patch includes below contents.
- set callbacks to MIPI Client driver at mipi_ddi_platform_data declaration.
- use MIPI regulator names set at s5p_platform_dsim declaration to get regulators for them.
- use a table to get freq_band value.
- code clean and fix minor bugs.

v2 patch includes below contents.
- use generic header(include/video/mipi_display.h) for MIPI-DSI commands.
- remove lcd panel specific definitions from dsim.h.

LCD Panel can use following interfaces,
- RGB or CPU Interface.
- RGB or CPU Interface based on MIPI-DSI.

in case of cell phone device, small size lcd panel(less then 480x800) was ok only rgb or cpu interface not using mipi controller. but big size panel(bigger then 480x800) needs MIPI-DSI Interface or other hardwares like LVDS to transfer image data to lcd panel fine.

I tested this patch on cpu interface based on MIPI-DSI and also considered RGB interface.

This patch set consists of the following patches,

[PATCH v2 1/2] S5PV210: FB: Add MIPI-DSI and CPU Interface features. [PATCH v2 2/2] S5PV210: Add MIPI-DSI Driver.

Best regards,
InKi Dae

author
#1 lore raw

PATCH v2 1/2 S5PV210: FB: Add MIPI-DSI and CPU Interface features.

this patch adds features for supportting MIPI Interface and CPU mode to s3c-fb.c

for this, I added following features.
. add struct fb_cmdmode
- this structure would be used for cpu interface.
. add interface_mode to struct s3c_fb_platdata.
- this variable would be used to distinguishe whether CPU or RGB mode. . add two functions for cpu interface.
- s3c_fb_set_trigger would be used for to send trigger signal to FIMD.
- s3c_fb_is_i80_frame_done would be used to check framedone status. . add a function for setting timing.
- I added this function because it have to distinguishe interfaces. (CPU or RGB mode)
. add register definitions for using MIPI-DSI mode.

Signed-off-by InKi Dae <[email protected]>
Signed-off-by Kyungmin Park <[email protected]>

---

arch/arm/plat-samsung/include/plat/fb.h +26 -0
index 27d3b49..b0204f8 100644
@@ -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 */
arch/arm/plat-samsung/include/plat/regs-fb-v4.h +16 -0
index 0f43599..4d5954b 100644
@@ -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 */
arch/arm/plat-samsung/include/plat/regs-fb.h +1 -0
index 0ef806e..70342aa 100644
@@ -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)
drivers/video/s3c-fb.c +102 -25

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author
#3 lore raw

PATCH v2 2/2 S5PV210: Add MIPI-DSI Driver.

In reply to InKi Dae

this patch addes MIPI-DSI Driver.

to use this driver, some structures below should be added to machine specific file.

struct dsim_config
- define clock info, data lane count and video mode info for MIPI-DSI Controller.

struct dsim_lcd_config
- define interface mode, channel ID, Pixel format and so on.

struct s5p_platform_dsim
- define callbacks for initializing D-PHY, MIPI reset and trigger releated interfaces of s3c-fb.c file.

struct mipi_ddi_platform_data
- define following callbacks.
- a function for transferring and receiving command data to mipi based lcd panel.
- a function for getting framedone status of mipi-dsi controller.
- a function for clearing framedone interrupt of mipi-dsi controller.
- a function for checking i80 framedone status of display controller.(fimd)
- a function for triggering to display controller.(fimd)

Signed-off-by InKi Dae <[email protected]>
Signed-off-by Kyungmin Park <[email protected]>

---

arch/arm/mach-s5pv210/include/mach/regs-clock.h +1 -0
index 2a25ab4..f716678 100644
@@ -162,6 +162,7 @@
 
 /* MIPI */
 #define S5P_MIPI_DPHY_EN		(3)
+#define S5P_MIPI_M_RESETN		(1 << 1)
 
 /* S5P_DAC_CONTROL */
 #define S5P_DAC_ENABLE			(1)
arch/arm/plat-samsung/Makefile +3 -0
index c9abae5..2f164dc 100644
@@ -50,6 +50,9 @@ obj-$(CONFIG_S3C_DEV_RTC)	+= dev-rtc.o
 obj-$(CONFIG_SAMSUNG_DEV_ADC)	+= dev-adc.o
 obj-$(CONFIG_SAMSUNG_DEV_TS)	+= dev-ts.o
 
+# Device setup - MIPI-DSI
+obj-$(CONFIG_S5P_MIPI_DSI)  += setup-dsim.o
+
 # DMA support
 
 obj-$(CONFIG_S3C_DMA)		+= dma.o
arch/arm/plat-samsung/include/plat/dsim.h new file +447 -0

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arch/arm/plat-samsung/include/plat/mipi_ddi.h new file +98 -0

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arch/arm/plat-samsung/include/plat/regs-dsim.h new file +281 -0

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arch/arm/plat-samsung/setup-dsim.c new file +144 -0

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drivers/video/Kconfig +8 -1
index a9f9e5e..17f00da 100644
@@ -1938,7 +1938,7 @@ config FB_TMIO_ACCELL
 
 config FB_S3C
 	tristate "Samsung S3C framebuffer support"
-	depends on FB && ARCH_S3C64XX
+	depends on FB && (ARCH_S3C64XX || ARCH_S5PV210)
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT

@@ -1983,6 +1983,13 @@ config FB_S3C2410_DEBUG
 	  Turn on debugging messages. Note that you can set/unset at run time
 	  through sysfs
 
+config S5P_MIPI_DSI
+	tristate "Samsung SoC MIPI-DSI support."
+	depends on FB_S3C && ARCH_S5PV210
+	default n
+	---help---
+	  This enables support for MIPI-DSI device.
+
 config FB_NUC900
         bool "NUC900 LCD framebuffer support"
         depends on FB && ARCH_W90X900
drivers/video/Makefile +2 -0
index 3c3bf86..d552d28 100644
@@ -115,6 +115,8 @@ obj-$(CONFIG_FB_SH7760)		  += sh7760fb.o
 obj-$(CONFIG_FB_IMX)              += imxfb.o
 obj-$(CONFIG_FB_S3C)		  += s3c-fb.o
 obj-$(CONFIG_FB_S3C2410)	  += s3c2410fb.o
+obj-$(CONFIG_S5P_MIPI_DSI)	  += s5p-dsim.o s5p_dsim_common.o \
+    					s5p_dsim_lowlevel.o
 obj-$(CONFIG_FB_FSL_DIU)	  += fsl-diu-fb.o
 obj-$(CONFIG_FB_COBALT)           += cobalt_lcdfb.o
 obj-$(CONFIG_FB_PNX4008_DUM)	  += pnx4008/
drivers/video/s5p-dsim.c new file +471 -0

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drivers/video/s5p_dsim_common.c new file +691 -0

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drivers/video/s5p_dsim_common.h new file +35 -0
new file mode 100644
index 0000000..95f51bc
@@ -0,0 +1,35 @@
+/* linux/drivers/video/samsung/s5p_dsim_common.h
+ *
+ * Header file for Samsung MIPI-DSI common driver.
+ *
+ * Copyright (c) 2009 Samsung Electronics
+ * InKi Dae <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef _S5P_DSIM_COMMON_H
+#define _S5P_DSIM_COMMON_H
+
+extern int s5p_dsim_init_header_fifo(struct dsim_global *dsim);
+extern int s5p_dsim_pll_on(struct dsim_global *dsim, unsigned int enable);
+extern unsigned long s5p_dsim_change_pll(struct dsim_global *dsim,
+	unsigned int pre_divider, unsigned int main_divider,
+	unsigned int scaler);
+extern int s5p_dsim_set_clock(struct dsim_global *dsim,
+	unsigned int byte_clk_sel, unsigned int enable);
+extern int s5p_dsim_init_dsim(struct dsim_global *dsim);
+extern int s5p_dsim_set_display_mode(struct dsim_global *dsim,
+	struct dsim_lcd_config *main_lcd, struct dsim_lcd_config *sub_lcd);
+extern int s5p_dsim_init_link(struct dsim_global *dsim);
+extern int s5p_dsim_set_hs_enable(struct dsim_global *dsim);
+extern int s5p_dsim_set_data_transfer_mode(struct dsim_global *dsim,
+	unsigned int data_path, unsigned int hs_enable);
+extern int s5p_dsim_enable_frame_done_int(struct dsim_global *dsim,
+	unsigned int enable);
+
+extern struct fb_info *registered_fb[FB_MAX] __read_mostly;
+
+#endif /* _S5P_DSIM_COMMON_H */
drivers/video/s5p_dsim_lowlevel.c new file +569 -0

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drivers/video/s5p_dsim_lowlevel.h new file +101 -0

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#2 lore raw

PATCH v2 1/2 S5PV210: FB: Add MIPI-DSI and CPU Interface features.

In reply to InKi Dae
Quoted 16 lines · On Wed, 07 Jul 2010 15:39:35 +0900 InKi Dae wrote:

this patch adds features for supportting MIPI Interface and CPU mode to s3c-fb.c

for this, I added following features.
. add struct fb_cmdmode
- this structure would be used for cpu interface.
. add interface_mode to struct s3c_fb_platdata.
- this variable would be used to distinguishe whether CPU or RGB mode. . add two functions for cpu interface.
- s3c_fb_set_trigger would be used for to send trigger signal to FIMD.
- s3c_fb_is_i80_frame_done would be used to check framedone status. . add a function for setting timing.
- I added this function because it have to distinguishe interfaces. (CPU or RGB mode)
. add register definitions for using MIPI-DSI mode.

Quoted 2 lines
Signed-off-by InKi Dae <[email protected]>
Signed-off-by Kyungmin Park <[email protected]>

Please include a diffstat summary so that reviewers can see what files are being changed/added/removed and how large the changes are.
See Documentation/SubmittingPatches for info.

drivers/video/s3c-fb.c static int s3c_fb_align_word(unsigned int bpp, unsigned int pix) · line 258

Quoted 9 lines
drivers/video/s3c-fb.c +1 -0
index 9682ecc..28d34ef 100644
@@ -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.

kernel-doc notation is missing the function argument line:

* @info: <description>

Quoted 7 lines
drivers/video/s3c-fb.c +7 -0
+ */
+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;

drivers/video/s3c-fb.c static int s3c_fb_align_word(unsigned int bpp, unsigned int pix) · line 275

Quoted 10 lines
drivers/video/s3c-fb.c +10 -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.

Ditto.

Quoted 5 lines
drivers/video/s3c-fb.c +5 -0
+ */
+int s3c_fb_is_i80_frame_done(struct fb_info *info)
+{
+	struct s3c_fb_win *win = info->par;
+	struct s3c_fb *sfb = win->parent;

drivers/video/s3c-fb.c static int s3c_fb_align_word(unsigned int bpp, unsigned int pix) · line 290

Quoted 10 lines
drivers/video/s3c-fb.c +10 -0
+	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.

Ditto.

Quoted 27 lines
drivers/video/s3c-fb.c +27 -0
+ */
+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;

drivers/video/s3c-fb.c static int s3c_fb_align_word(unsigned int bpp, unsigned int pix) · line 327

Quoted 10 lines
drivers/video/s3c-fb.c +7 -0
+
+		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.
  *

---
~Randy
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