video: exynos_dp: Make dp_regs global

dp_regs variable was redundantly defined across all the functions in
the driver even though it contains just the same address. We make it
global and initialize it once using exynos_dp_set_base_addr().
>From then on, other funtions can use the address stored in the global variable.

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

drivers/video/exynos_dp.c

@@ -876,6 +876,8 @@ unsigned int exynos_init_dp(void)
 		return -EFAULT;
 	}
 
+	exynos_dp_set_base_addr();
+
 	exynos_dp_disp_info(&edp_info->disp_info);
 
 	exynos_set_dp_phy(1);

drivers/video/exynos_dp_lowlevel.c

@@ -26,10 +26,16 @@
 #include <asm/arch/dp_info.h>
 #include <asm/arch/dp.h>
 
+struct exynos_dp *dp_regs;
+
+void exynos_dp_set_base_addr(void)
+{
+	dp_regs = (struct exynos_dp *)samsung_get_base_dp();
+}
+
 static void exynos_dp_enable_video_input(unsigned int enable)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->video_ctl1);
 	reg &= ~VIDEO_EN_MASK;
@@ -47,7 +53,6 @@ void exynos_dp_enable_video_bist(unsigned int enable)
 {
 	/*enable video bist*/
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->video_ctl4);
 	reg &= ~VIDEO_BIST_MASK;
@@ -64,7 +69,6 @@ void exynos_dp_enable_video_bist(unsigned int enable)
 void exynos_dp_enable_video_mute(unsigned int enable)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->video_ctl1);
 	reg &= ~(VIDEO_MUTE_MASK);
@@ -80,7 +84,6 @@ void exynos_dp_enable_video_mute(unsigned int enable)
 static void exynos_dp_init_analog_param(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/*
 	 * Set termination
@@ -129,7 +132,6 @@ static void exynos_dp_init_analog_param(void)
 
 static void exynos_dp_init_interrupt(void)
 {
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 	/* Set interrupt registers to initial states */
 
 	/*
@@ -158,7 +160,6 @@ static void exynos_dp_init_interrupt(void)
 void exynos_dp_reset(void)
 {
 	unsigned int reg_func_1;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/*dp tx sw reset*/
 	writel(RESET_DP_TX, &dp_regs->tx_sw_reset);
@@ -186,7 +187,6 @@ void exynos_dp_reset(void)
 void exynos_dp_enable_sw_func(unsigned int enable)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->func_en1);
 	reg &= ~(SW_FUNC_EN_N);
@@ -202,7 +202,6 @@ void exynos_dp_enable_sw_func(unsigned int enable)
 unsigned int exynos_dp_set_analog_power_down(unsigned int block, u32 enable)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->phy_pd);
 	switch (block) {
@@ -256,7 +255,6 @@ unsigned int exynos_dp_set_analog_power_down(unsigned int block, u32 enable)
 unsigned int exynos_dp_get_pll_lock_status(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->debug_ctl);
 
@@ -269,7 +267,6 @@ unsigned int exynos_dp_get_pll_lock_status(void)
 static void exynos_dp_set_pll_power(unsigned int enable)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->pll_ctl);
 	reg &= ~(DP_PLL_PD);
@@ -285,7 +282,6 @@ int exynos_dp_init_analog_func(void)
 	int ret = EXYNOS_DP_SUCCESS;
 	unsigned int retry_cnt = 10;
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/*Power On All Analog block */
 	exynos_dp_set_analog_power_down(POWER_ALL, DP_DISABLE);
@@ -335,7 +331,6 @@ int exynos_dp_init_analog_func(void)
 void exynos_dp_init_hpd(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Clear interrupts releated to Hot Plug Dectect */
 	reg = HOTPLUG_CHG | HPD_LOST | PLUG;
@@ -354,7 +349,6 @@ void exynos_dp_init_hpd(void)
 static inline void exynos_dp_reset_aux(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Disable AUX channel module */
 	reg = readl(&dp_regs->func_en2);
@@ -367,7 +361,6 @@ static inline void exynos_dp_reset_aux(void)
 void exynos_dp_init_aux(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Clear inerrupts related to AUX channel */
 	reg = RPLY_RECEIV | AUX_ERR;
@@ -395,7 +388,6 @@ void exynos_dp_init_aux(void)
 void exynos_dp_config_interrupt(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* 0: mask, 1: unmask */
 	reg = COMMON_INT_MASK_1;
@@ -419,7 +411,6 @@ void exynos_dp_config_interrupt(void)
 unsigned int exynos_dp_get_plug_in_status(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->sys_ctl3);
 	if (reg & HPD_STATUS)
@@ -449,7 +440,6 @@ unsigned int exynos_dp_start_aux_transaction(void)
 	unsigned int reg;
 	unsigned int ret = 0;
 	unsigned int retry_cnt;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Enable AUX CH operation */
 	reg = readl(&dp_regs->aux_ch_ctl2);
@@ -498,7 +488,6 @@ unsigned int exynos_dp_write_byte_to_dpcd(unsigned int reg_addr,
 				unsigned char data)
 {
 	unsigned int reg, ret;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Clear AUX CH data buffer */
 	reg = BUF_CLR;
@@ -539,7 +528,6 @@ unsigned int exynos_dp_read_byte_from_dpcd(unsigned int reg_addr,
 {
 	unsigned int reg;
 	int retval;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Clear AUX CH data buffer */
 	reg = BUF_CLR;
@@ -583,7 +571,6 @@ unsigned int exynos_dp_write_bytes_to_dpcd(unsigned int reg_addr,
 	unsigned int cur_data_idx;
 	unsigned int retry_cnt;
 	unsigned int ret = 0;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Clear AUX CH data buffer */
 	reg = BUF_CLR;
@@ -649,7 +636,6 @@ unsigned int exynos_dp_read_bytes_from_dpcd(unsigned int reg_addr,
 	unsigned int cur_data_idx;
 	unsigned int retry_cnt;
 	unsigned int ret = 0;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Clear AUX CH data buffer */
 	reg = BUF_CLR;
@@ -711,7 +697,6 @@ int exynos_dp_select_i2c_device(unsigned int device_addr,
 {
 	unsigned int reg;
 	int retval;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Set EDID device address */
 	reg = device_addr;
@@ -746,7 +731,6 @@ int exynos_dp_read_byte_from_i2c(unsigned int device_addr,
 	unsigned int reg;
 	int i;
 	int retval;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	for (i = 0; i < 10; i++) {
 		/* Clear AUX CH data buffer */
@@ -790,7 +774,6 @@ int exynos_dp_read_bytes_from_i2c(unsigned int device_addr,
 	unsigned int cur_data_idx;
 	unsigned int defer = 0;
 	int retval = 0;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	for (i = 0; i < count; i += 16) { /* use 16 burst */
 		for (j = 0; j < 100; j++) {
@@ -854,7 +837,6 @@ int exynos_dp_read_bytes_from_i2c(unsigned int device_addr,
 void exynos_dp_reset_macro(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->phy_test);
 	reg |= MACRO_RST;
@@ -870,7 +852,6 @@ void exynos_dp_reset_macro(void)
 void exynos_dp_set_link_bandwidth(unsigned char bwtype)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = (unsigned int)bwtype;
 
@@ -883,7 +864,6 @@ unsigned char exynos_dp_get_link_bandwidth(void)
 {
 	unsigned char ret;
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->link_bw_set);
 	ret = (unsigned char)reg;
@@ -894,7 +874,6 @@ unsigned char exynos_dp_get_link_bandwidth(void)
 void exynos_dp_set_lane_count(unsigned char count)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = (unsigned int)count;
 
@@ -906,7 +885,6 @@ void exynos_dp_set_lane_count(unsigned char count)
 unsigned int exynos_dp_get_lane_count(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->lane_count_set);
 
@@ -915,7 +893,6 @@ unsigned int exynos_dp_get_lane_count(void)
 
 unsigned char exynos_dp_get_lanex_pre_emphasis(unsigned char lanecnt)
 {
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 	unsigned int reg_list[DP_LANE_CNT_4] = {
 		(unsigned int)&dp_regs->ln0_link_training_ctl,
 		(unsigned int)&dp_regs->ln1_link_training_ctl,
@@ -929,7 +906,6 @@ unsigned char exynos_dp_get_lanex_pre_emphasis(unsigned char lanecnt)
 void exynos_dp_set_lanex_pre_emphasis(unsigned char request_val,
 		unsigned char lanecnt)
 {
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 	unsigned int reg_list[DP_LANE_CNT_4] = {
 		(unsigned int)&dp_regs->ln0_link_training_ctl,
 		(unsigned int)&dp_regs->ln1_link_training_ctl,
@@ -944,7 +920,6 @@ void exynos_dp_set_lane_pre_emphasis(unsigned int level, unsigned char lanecnt)
 {
 	unsigned char i;
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 	unsigned int reg_list[DP_LANE_CNT_4] = {
 		(unsigned int)&dp_regs->ln0_link_training_ctl,
 		(unsigned int)&dp_regs->ln1_link_training_ctl,
@@ -967,7 +942,6 @@ void exynos_dp_set_lane_pre_emphasis(unsigned int level, unsigned char lanecnt)
 void exynos_dp_set_training_pattern(unsigned int pattern)
 {
 	unsigned int reg = 0;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	switch (pattern) {
 	case PRBS7:
@@ -996,7 +970,6 @@ void exynos_dp_set_training_pattern(unsigned int pattern)
 void exynos_dp_enable_enhanced_mode(unsigned char enable)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->sys_ctl4);
 	reg &= ~ENHANCED;
@@ -1010,7 +983,6 @@ void exynos_dp_enable_enhanced_mode(unsigned char enable)
 void exynos_dp_enable_scrambling(unsigned int enable)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->training_ptn_set);
 	reg &= ~(SCRAMBLING_DISABLE);
@@ -1024,7 +996,6 @@ void exynos_dp_enable_scrambling(unsigned int enable)
 int exynos_dp_init_video(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Clear VID_CLK_CHG[1] and VID_FORMAT_CHG[3] and VSYNC_DET[7] */
 	reg = VSYNC_DET | VID_FORMAT_CHG | VID_CLK_CHG;
@@ -1040,7 +1011,6 @@ int exynos_dp_init_video(void)
 void exynos_dp_config_video_slave_mode(struct edp_video_info *video_info)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Video Slave mode setting */
 	reg = readl(&dp_regs->func_en1);
@@ -1074,7 +1044,6 @@ void exynos_dp_config_video_slave_mode(struct edp_video_info *video_info)
 void exynos_dp_set_video_color_format(struct edp_video_info *video_info)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Configure the input color depth, color space, dynamic range */
 	reg = (video_info->dynamic_range << IN_D_RANGE_SHIFT) |
@@ -1097,7 +1066,6 @@ int exynos_dp_config_video_bist(struct edp_device_info *edp_info)
 	unsigned int reg;
 	unsigned int bist_type = 0;
 	struct edp_video_info video_info = edp_info->video_info;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* For master mode, you don't need to set the video format */
 	if (video_info.master_mode == 0) {
@@ -1186,7 +1154,6 @@ int exynos_dp_config_video_bist(struct edp_device_info *edp_info)
 unsigned int exynos_dp_is_slave_video_stream_clock_on(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Update Video stream clk detect status */
 	reg = readl(&dp_regs->sys_ctl1);
@@ -1206,7 +1173,6 @@ void exynos_dp_set_video_cr_mn(unsigned int type, unsigned int m_value,
 		unsigned int n_value)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	if (type == REGISTER_M) {
 		reg = readl(&dp_regs->sys_ctl4);
@@ -1235,7 +1201,6 @@ void exynos_dp_set_video_cr_mn(unsigned int type, unsigned int m_value,
 void exynos_dp_set_video_timing_mode(unsigned int type)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->video_ctl10);
 	reg &= ~FORMAT_SEL;
@@ -1249,7 +1214,6 @@ void exynos_dp_set_video_timing_mode(unsigned int type)
 void exynos_dp_enable_video_master(unsigned int enable)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	reg = readl(&dp_regs->soc_general_ctl);
 	if (enable) {
@@ -1266,7 +1230,6 @@ void exynos_dp_enable_video_master(unsigned int enable)
 void exynos_dp_start_video(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Enable Video input and disable Mute */
 	reg = readl(&dp_regs->video_ctl1);
@@ -1277,7 +1240,6 @@ void exynos_dp_start_video(void)
 unsigned int exynos_dp_is_video_stream_on(void)
 {
 	unsigned int reg;
-	struct exynos_dp *dp_regs = (struct exynos_dp *)samsung_get_base_dp();
 
 	/* Update STRM_VALID */
 	reg = readl(&dp_regs->sys_ctl3);

drivers/video/exynos_dp_lowlevel.h

@@ -76,5 +76,6 @@ void exynos_dp_set_video_timing_mode(unsigned int type);
 void exynos_dp_enable_video_master(unsigned int enable);
 void exynos_dp_start_video(void);
 unsigned int exynos_dp_is_video_stream_on(void);
+void exynos_dp_set_base_addr(void);
 
 #endif /* _EXYNOS_DP_LOWLEVEL_H */