video: exynos_fb: Remove callbacks from the driver

Replaced the functionality of callbacks by using a standard set of functions.
Instead of implementing and hooking up a callback, put the same code in one of
the standard set of functions by overriding it.

This patch is tested only on SMDK5250.
For Trats and universal_c210 board, it is only compile tested.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

board/samsung/smdk5250/smdk5250.c

@@ -454,7 +454,7 @@ int board_early_init_f(void)
 #endif
 
 #ifdef CONFIG_LCD
-void cfg_lcd_gpio(void)
+void exynos_cfg_lcd_gpio(void)
 {
 	struct exynos5_gpio_part1 *gpio1 =
 		(struct exynos5_gpio_part1 *) samsung_get_base_gpio_part1();
@@ -494,10 +494,6 @@ vidinfo_t panel_info = {
 	.vl_cmd_allow_len = 0xf,
 
 	.win_id		= 3,
-	.cfg_gpio	= cfg_lcd_gpio,
-	.backlight_on	= NULL,
-	.lcd_power_on	= NULL,
-	.reset_lcd	= NULL,
 	.dual_lcd_enabled = 0,
 
 	.init_delay	= 0,

board/samsung/trats/trats.c

@@ -635,7 +635,7 @@ int board_early_init_f(void)
 	return 0;
 }
 
-static void lcd_reset(void)
+void exynos_reset_lcd(void)
 {
 	struct exynos4_gpio_part2 *gpio2 =
 		(struct exynos4_gpio_part2 *)samsung_get_base_gpio_part2();
@@ -755,10 +755,6 @@ vidinfo_t panel_info = {
 	.vl_cmd_allow_len = 0xf,
 
 	.win_id		= 3,
-	.cfg_gpio	= NULL,
-	.backlight_on	= NULL,
-	.lcd_power_on	= NULL,	/* lcd_power_on in mipi dsi driver */
-	.reset_lcd	= lcd_reset,
 	.dual_lcd_enabled = 0,
 
 	.init_delay	= 0,

board/samsung/universal_c210/universal.c

@@ -384,7 +384,7 @@ static void init_pmic_lcd(void)
 		puts("LCD pmic initialisation error!\n");
 }
 
-static void lcd_cfg_gpio(void)
+void exynos_cfg_lcd_gpio(void)
 {
 	unsigned int i, f3_end = 4;
 
@@ -423,7 +423,7 @@ static void lcd_cfg_gpio(void)
 	spi_init();
 }
 
-static void reset_lcd(void)
+void exynos_reset_lcd(void)
 {
 	s5p_gpio_set_value(&gpio2->y4, 5, 1);
 	udelay(10000);
@@ -433,7 +433,7 @@ static void reset_lcd(void)
 	udelay(100);
 }
 
-static void lcd_power_on(void)
+void exynos_lcd_power_on(void)
 {
 	struct pmic *p = pmic_get("MAX8998_PMIC");
 
@@ -471,10 +471,6 @@ vidinfo_t panel_info = {
 	.vl_cmd_allow_len = 0xf,
 
 	.win_id		= 0,
-	.cfg_gpio	= lcd_cfg_gpio,
-	.backlight_on	= NULL,
-	.lcd_power_on	= lcd_power_on,
-	.reset_lcd	= reset_lcd,
 	.dual_lcd_enabled = 0,
 
 	.init_delay	= 0,
@@ -484,6 +480,16 @@ vidinfo_t panel_info = {
 	.mipi_enabled	= 0,
 };
 
+void exynos_cfg_ldo(void)
+{
+	ld9040_cfg_ldo();
+}
+
+void exynos_enable_ldo(unsigned int onoff)
+{
+	ld9040_enable_ldo(onoff);
+}
+
 void init_panel_info(vidinfo_t *vid)
 {
 	vid->logo_on	= 1;
@@ -498,9 +504,6 @@ void init_panel_info(vidinfo_t *vid)
 	vid->pclk_name = 1;	/* MPLL */
 	vid->sclk_div = 1;
 
-	vid->cfg_ldo = ld9040_cfg_ldo;
-	vid->enable_ldo = ld9040_enable_ldo;
-
 	setenv("lcdinfo", "lcd=ld9040");
 }
 

drivers/video/exynos_fb.c

@@ -93,37 +93,72 @@ static void draw_logo(void)
 }
 #endif
 
+void __exynos_cfg_lcd_gpio(void)
+{
+}
+void exynos_cfg_lcd_gpio(void)
+	__attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
+
+void __exynos_backlight_on(unsigned int onoff)
+{
+}
+void exynos_backlight_on(unsigned int onoff)
+	__attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
+
+void __exynos_reset_lcd(void)
+{
+}
+void exynos_reset_lcd(void)
+	__attribute__((weak, alias("__exynos_reset_lcd")));
+
+void __exynos_lcd_power_on(void)
+{
+}
+void exynos_lcd_power_on(void)
+	__attribute__((weak, alias("__exynos_lcd_power_on")));
+
+void __exynos_cfg_ldo(void)
+{
+}
+void exynos_cfg_ldo(void)
+	__attribute__((weak, alias("__exynos_cfg_ldo")));
+
+void __exynos_enable_ldo(unsigned int onoff)
+{
+}
+void exynos_enable_ldo(unsigned int onoff)
+	__attribute__((weak, alias("__exynos_enable_ldo")));
+
+void __exynos_backlight_reset(void)
+{
+}
+void exynos_backlight_reset(void)
+	__attribute__((weak, alias("__exynos_backlight_reset")));
+
 static void lcd_panel_on(vidinfo_t *vid)
 {
 	udelay(vid->init_delay);
 
-	if (vid->backlight_reset)
-		vid->backlight_reset();
+	exynos_backlight_reset();
 
-	if (vid->cfg_gpio)
-		vid->cfg_gpio();
+	exynos_cfg_lcd_gpio();
 
-	if (vid->lcd_power_on)
-		vid->lcd_power_on();
+	exynos_lcd_power_on();
 
 	udelay(vid->power_on_delay);
 
 	if (vid->dp_enabled)
 		exynos_init_dp();
 
-	if (vid->reset_lcd) {
-		vid->reset_lcd();
-		udelay(vid->reset_delay);
-	}
+	exynos_reset_lcd();
+
+	udelay(vid->reset_delay);
 
-	if (vid->backlight_on)
-		vid->backlight_on(1);
+	exynos_backlight_on(1);
 
-	if (vid->cfg_ldo)
-		vid->cfg_ldo();
+	exynos_cfg_ldo();
 
-	if (vid->enable_ldo)
-		vid->enable_ldo(1);
+	exynos_enable_ldo(1);
 
 	if (vid->mipi_enabled)
 		exynos_mipi_dsi_init();

include/lcd.h

@@ -234,15 +234,6 @@ typedef struct vidinfo {
 	u_char	vl_vbpd;	/* Wait end of frame */
 	u_char  vl_cmd_allow_len; /* Wait end of frame */
 
-	void (*cfg_gpio)(void);
-	void (*backlight_on)(unsigned int onoff);
-	void (*reset_lcd)(void);
-	void (*lcd_power_on)(void);
-	void (*cfg_ldo)(void);
-	void (*enable_ldo)(unsigned int onoff);
-	void (*mipi_power)(void);
-	void (*backlight_reset)(void);
-
 	unsigned int win_id;
 	unsigned int init_delay;
 	unsigned int power_on_delay;