video: exynos_dp: 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.

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

arch/arm/include/asm/arch-exynos/dp_info.h

@@ -199,7 +199,6 @@ enum {
 
 struct exynos_dp_platform_data {
 	struct edp_device_info *edp_dev_info;
-	void (*phy_enable)(unsigned int);
 };
 
 #ifdef CONFIG_EXYNOS_DP

board/samsung/smdk5250/smdk5250.c

@@ -503,6 +503,11 @@ vidinfo_t panel_info = {
 	.dp_enabled	= 1,
 };
 
+void exynos_set_dp_phy(unsigned int onoff)
+{
+	set_dp_phy_ctrl(onoff);
+}
+
 static struct edp_device_info edp_info = {
 	.disp_info = {
 		.h_res = 2560,
@@ -533,7 +538,6 @@ static struct edp_device_info edp_info = {
 };
 
 static struct exynos_dp_platform_data dp_platform_data = {
-	.phy_enable	= set_dp_phy_ctrl,
 	.edp_dev_info	= &edp_info,
 };
 

drivers/video/exynos_dp.c

@@ -32,6 +32,12 @@
 
 static struct exynos_dp_platform_data *dp_pd;
 
+void __exynos_set_dp_phy(unsigned int onoff)
+{
+}
+void exynos_set_dp_phy(unsigned int onoff)
+	__attribute__((weak, alias("__exynos_set_dp_phy")));
+
 static void exynos_dp_disp_info(struct edp_disp_info *disp_info)
 {
 	disp_info->h_total = disp_info->h_res + disp_info->h_sync_width +
@@ -872,8 +878,7 @@ unsigned int exynos_init_dp(void)
 
 	exynos_dp_disp_info(&edp_info->disp_info);
 
-	if (dp_pd->phy_enable)
-		dp_pd->phy_enable(1);
+	exynos_set_dp_phy(1);
 
 	ret = exynos_dp_init_dp();
 	if (ret != EXYNOS_DP_SUCCESS) {