diff options
Diffstat (limited to 'drivers/video/samsung_duallcd/s3cfb_s6e8ab0.c')
| -rw-r--r-- | drivers/video/samsung_duallcd/s3cfb_s6e8ab0.c | 985 |
1 files changed, 985 insertions, 0 deletions
diff --git a/drivers/video/samsung_duallcd/s3cfb_s6e8ab0.c b/drivers/video/samsung_duallcd/s3cfb_s6e8ab0.c new file mode 100644 index 0000000..bc47c37 --- /dev/null +++ b/drivers/video/samsung_duallcd/s3cfb_s6e8ab0.c @@ -0,0 +1,985 @@ +/* linux/drivers/video/samsung/s3cfb_s6e8ab0.c + * + * MIPI-DSI based AMS767KC01 AMOLED lcd panel driver. + * + * 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. + * +*/ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/mutex.h> +#include <linux/wait.h> +#include <linux/ctype.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/gpio.h> +#include <linux/workqueue.h> +#include <linux/backlight.h> +#include <linux/lcd.h> +#include <plat/gpio-cfg.h> +#include <plat/regs-dsim.h> +#include <mach/dsim.h> +#include <mach/mipi_ddi.h> +#ifdef CONFIG_HAS_EARLYSUSPEND +#include <linux/earlysuspend.h> +#endif + +#define SMART_DIMMING + +#include "s3cfb.h" +#include "s5p-dsim.h" +#include "s6e8ab0_param.h" +#include "s6e8ab0_gamma.h" +#ifdef SMART_DIMMING +#include "smart_dimming_s6e8ab0.h" +#endif + +#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) + +#define MIN_BRIGHTNESS 0 +#define MAX_BRIGHTNESS 255 +#define DEFAULT_BRIGHTNESS 150 /* this is not candela */ +#define DEFAULT_GAMMA_LEVEL GAMMA_150CD + +#define LDI_ID_REG 0xD1 +#define LDI_ID_LEN 3 + +#ifdef SMART_DIMMING +#define LDI_MTP_LENGTH 24 +#define LDI_MTP_ADDR 0xD3 + +#define ELVSS_OFFSET_MAX 0x00 +#define ELVSS_OFFSET_2 0x04 +#define ELVSS_OFFSET_1 0x08 +#define ELVSS_OFFSET_MIN 0x0C + +#define ELVSS_MIN_VALUE 0x81 +#define ELVSS_MAX_VALUE_MODE0 0xA1 +#define ELVSS_MAX_VALUE_MODE1 0xA9 + +#define ELVSS_MODE0_MIN_VOLTAGE 64 +#define ELVSS_MODE1_MIN_VOLTAGE 64 + +struct str_elvss { + u8 reference; + u8 limit; +}; +#endif + +struct lcd_info { + unsigned int bl; + unsigned int acl_enable; + unsigned int cur_acl; + unsigned int current_bl; + + unsigned int ldi_enable; + unsigned int power; + struct mutex lock; + struct mutex bl_lock; + + struct device *dev; + struct lcd_device *ld; + struct backlight_device *bd; + struct lcd_platform_data *lcd_pd; + struct early_suspend early_suspend; + + unsigned char id[LDI_ID_LEN]; + + unsigned char **gamma_table; + unsigned char **elvss_table; + unsigned char elvss_cmd_length; + +#ifdef SMART_DIMMING + unsigned int support_elvss; + struct str_smart_dim smart; + struct str_elvss elvss; +#endif + unsigned int connected; + + struct dsim_global *dsim; +}; + +static int s6e8ax0_write(struct lcd_info *lcd, const unsigned char *seq, int len) +{ + int size; + const unsigned char *wbuf; + + if (!lcd->connected) + return 0; + + mutex_lock(&lcd->lock); + + size = len; + wbuf = seq; + + if (size == 1) + lcd->dsim->ops->cmd_write(lcd->dsim, DCS_WR_NO_PARA, wbuf[0], 0); + else if (size == 2) + lcd->dsim->ops->cmd_write(lcd->dsim, DCS_WR_1_PARA, wbuf[0], wbuf[1]); + else + lcd->dsim->ops->cmd_write(lcd->dsim, DCS_LONG_WR, (unsigned int)wbuf, size); + + mutex_unlock(&lcd->lock); + + return 0; +} + +static int _s6e8ax0_read(struct lcd_info *lcd, const u8 addr, u16 count, u8 *buf) +{ + int ret = 0; + + if (!lcd->connected) + return ret; + + mutex_lock(&lcd->lock); + + if (lcd->dsim->ops->cmd_read) + ret = lcd->dsim->ops->cmd_read(lcd->dsim, addr, count, buf); + + mutex_unlock(&lcd->lock); + + return ret; +} + +static int s6e8ax0_read(struct lcd_info *lcd, const u8 addr, u16 count, u8 *buf, u8 retry_cnt) +{ + int ret = 0; + +read_retry: + ret = _s6e8ax0_read(lcd, addr, count, buf); + if (!ret) { + if (retry_cnt) { + printk(KERN_WARNING "[WARN:LCD] %s : retry cnt : %d\n", __func__, retry_cnt); + retry_cnt--; + goto read_retry; + } else + printk(KERN_ERR "[ERROR:LCD] %s : 0x%02x read failed\n", __func__, addr); + } + + return ret; +} + +#if 0 +static int get_backlight_level_from_brightness(int brightness) +{ + int backlightlevel; + + /* brightness setting from platform is from 0 to 255 + * But in this driver, brightness is only supported from 0 to 24 */ + + switch (brightness) { + case 0: + backlightlevel = GAMMA_30CD; + break; + case 1 ... 29: + backlightlevel = GAMMA_30CD; + break; + case 30 ... 34: + backlightlevel = GAMMA_40CD; + break; + case 35 ... 44: + backlightlevel = GAMMA_50CD; + break; + case 45 ... 54: + backlightlevel = GAMMA_60CD; + break; + case 55 ... 64: + backlightlevel = GAMMA_70CD; + break; + case 65 ... 74: + backlightlevel = GAMMA_80CD; + break; + case 75 ... 83: + backlightlevel = GAMMA_90CD; + break; + case 84 ... 93: + backlightlevel = GAMMA_100CD; + break; + case 94 ... 103: + backlightlevel = GAMMA_105CD; + break; + case 104 ... 113: + backlightlevel = GAMMA_110CD; + break; + case 114 ... 122: + backlightlevel = GAMMA_120CD; + break; + case 123 ... 132: + backlightlevel = GAMMA_130CD; + break; + case 133 ... 142: + backlightlevel = GAMMA_140CD; + break; + case 143 ... 152: + backlightlevel = GAMMA_150CD; + break; + case 153 ... 162: + backlightlevel = GAMMA_160CD; + break; + case 163 ... 171: + backlightlevel = GAMMA_170CD; + break; + case 172 ... 181: + backlightlevel = GAMMA_180CD; + break; + case 182 ... 191: + backlightlevel = GAMMA_190CD; + break; + case 192 ... 201: + backlightlevel = GAMMA_200CD; + break; + case 202 ... 210: + backlightlevel = GAMMA_205CD; + break; + case 211 ... 220: + backlightlevel = GAMMA_210CD; + break; + case 221 ... 230: + backlightlevel = GAMMA_220CD; + break; + case 231 ... 240: + backlightlevel = GAMMA_230CD; + break; + case 241 ... 250: + backlightlevel = GAMMA_240CD; + break; + case 251 ... 255: + backlightlevel = GAMMA_250CD; + break; + default: + backlightlevel = DEFAULT_GAMMA_LEVEL; + break; + } + return backlightlevel; +} +#endif + +static int s6e8ax0_gamma_ctl(struct lcd_info *lcd) +{ + /* Gamma Select */ + s6e8ax0_write(lcd, SEQ_GAMMA_SELECT, ARRAY_SIZE(SEQ_GAMMA_SELECT)); + + s6e8ax0_write(lcd, lcd->gamma_table[lcd->bl], GAMMA_PARAM_SIZE); + + /* Gamma Set Update */ + s6e8ax0_write(lcd, SEQ_GAMMA_UPDATE, ARRAY_SIZE(SEQ_GAMMA_UPDATE)); + + return 0; +} + +static int s6e8ax0_set_acl(struct lcd_info *lcd) +{ + int ret = 0; + + if (lcd->acl_enable) { + if (lcd->cur_acl == 0) { + if (lcd->bl == 0 || lcd->bl == 1) { + s6e8ax0_write(lcd, SEQ_ACL_OFF, ARRAY_SIZE(SEQ_ACL_OFF)); + dev_dbg(&lcd->ld->dev, "%s : cur_acl=%d, acl_off\n", __func__, lcd->cur_acl); + } else + s6e8ax0_write(lcd, SEQ_ACL_ON, ARRAY_SIZE(SEQ_ACL_ON)); + dev_dbg(&lcd->ld->dev, "%s : cur_acl=%d, acl_on\n", __func__, lcd->cur_acl); + } + switch (lcd->bl) { + case GAMMA_30CD ... GAMMA_40CD: /* 30cd ~ 40cd */ + if (lcd->cur_acl != 0) { + s6e8ax0_write(lcd, SEQ_ACL_OFF, ARRAY_SIZE(SEQ_ACL_OFF)); + lcd->cur_acl = 0; + dev_dbg(&lcd->ld->dev, "%s : cur_acl=%d\n", __func__, lcd->cur_acl); + } + break; + default: + if (lcd->cur_acl != 40) { + s6e8ax0_write(lcd, ACL_CUTOFF_TABLE[1], ACL_PARAM_SIZE); + lcd->cur_acl = 40; + dev_dbg(&lcd->ld->dev, "%s : cur_acl=%d\n", __func__, lcd->cur_acl); + } + break; + } + } else { + s6e8ax0_write(lcd, SEQ_ACL_OFF, ARRAY_SIZE(SEQ_ACL_OFF)); + lcd->cur_acl = 0; + dev_dbg(&lcd->ld->dev, "%s : cur_acl=%d, acl_off\n", __func__, lcd->cur_acl); + } + + if (ret) { + ret = -EPERM; + goto acl_err; + } + +acl_err: + return ret; +} + +static int s6e8ax0_set_elvss(struct lcd_info *lcd) +{ + int ret = 0; + u32 candela = candela_table[lcd->bl]; + + switch (candela) { + case 0 ... 100: + ret = s6e8ax0_write(lcd, lcd->elvss_table[0], lcd->elvss_cmd_length); + break; + case 101 ... 150: + ret = s6e8ax0_write(lcd, lcd->elvss_table[1], lcd->elvss_cmd_length); + break; + case 151 ... 200: + ret = s6e8ax0_write(lcd, lcd->elvss_table[2], lcd->elvss_cmd_length); + break; + case 201 ... 250: + ret = s6e8ax0_write(lcd, lcd->elvss_table[3], lcd->elvss_cmd_length); + break; + default: + break; + } + + dev_dbg(&lcd->ld->dev, "level = %d\n", lcd->bl); + + if (ret) { + ret = -EPERM; + goto elvss_err; + } + +elvss_err: + return ret; +} + +#ifdef SMART_DIMMING +static u8 get_elvss_offset(u32 elvss_level) +{ + u8 offset = 0; + + switch (elvss_level) { + case 0: + offset = ELVSS_OFFSET_MIN; + break; + case 1: + offset = ELVSS_OFFSET_1; + break; + case 2: + offset = ELVSS_OFFSET_2; + break; + case 3: + offset = ELVSS_OFFSET_MAX; + break; + default: + offset = ELVSS_OFFSET_MAX; + break; + } + return offset; +} + +static u8 get_elvss_value(struct lcd_info *lcd, u8 elvss_level) +{ + u8 ref = 0; + u8 offset; + u8 elvss_max_value; + + ref = (lcd->elvss.reference | 0x80); + + if (lcd->elvss.limit == 0x00) + elvss_max_value = ELVSS_MAX_VALUE_MODE0; + else if (lcd->elvss.limit == 0x01) + elvss_max_value = ELVSS_MAX_VALUE_MODE1; + else { + printk(KERN_ERR "[ERROR:ELVSS]:%s undefined elvss limit value :%x\n", __func__, lcd->elvss.limit); + return 0; + } + + offset = get_elvss_offset(elvss_level); + ref += offset; + + if (ref < ELVSS_MIN_VALUE) + ref = ELVSS_MIN_VALUE; + else if (ref > elvss_max_value) + ref = elvss_max_value; + + return ref; +} + +static int init_elvss_table(struct lcd_info *lcd) +{ + int i, ret = 0; + + lcd->elvss_table = kzalloc(ELVSS_STATUS_MAX * sizeof(u8 *), GFP_KERNEL); + + if (IS_ERR_OR_NULL(lcd->elvss_table)) { + pr_err("failed to allocate elvss table\n"); + ret = -ENOMEM; + goto err_alloc_elvss_table; + } + + for (i = 0; i < ELVSS_STATUS_MAX; i++) { + lcd->elvss_table[i] = kzalloc(3 * sizeof(u8), GFP_KERNEL); + if (IS_ERR_OR_NULL(lcd->elvss_table[i])) { + pr_err("failed to allocate elvss\n"); + ret = -ENOMEM; + goto err_alloc_elvss; + } + lcd->elvss_table[i][0] = 0xB1; + lcd->elvss_table[i][1] = 0x84; + lcd->elvss_table[i][2] = get_elvss_value(lcd, i); + } + + lcd->elvss_cmd_length = 3; + + return 0; + +err_alloc_elvss: + while (i > 0) { + kfree(lcd->elvss_table[i-1]); + i--; + } + kfree(lcd->elvss_table); +err_alloc_elvss_table: + return ret; +} + +static int init_gamma_table(struct lcd_info *lcd) +{ + int i, ret = 0; + + lcd->gamma_table = kzalloc(GAMMA_MAX * sizeof(u8 *), GFP_KERNEL); + if (IS_ERR_OR_NULL(lcd->gamma_table)) { + pr_err("failed to allocate gamma table\n"); + ret = -ENOMEM; + goto err_alloc_gamma_table; + } + + for (i = 0; i < GAMMA_MAX; i++) { + lcd->gamma_table[i] = kzalloc(GAMMA_PARAM_SIZE * sizeof(u8), GFP_KERNEL); + if (IS_ERR_OR_NULL(lcd->gamma_table[i])) { + pr_err("failed to allocate gamma\n"); + ret = -ENOMEM; + goto err_alloc_gamma; + } + lcd->gamma_table[i][0] = 0xFA; + calc_gamma_table(&lcd->smart, candela_table[i]-1, lcd->gamma_table[i]+1); + } +#if 0 + for (i = 0; i < GAMMA_MAX; i++) { + for (j = 0; j < GAMMA_PARAM_SIZE; j++) + printk("0x%02x, ", lcd->gamma_table[i][j]); + printk("\n"); + } +#endif + return 0; + +err_alloc_gamma: + while (i > 0) { + kfree(lcd->gamma_table[i-1]); + i--; + } + kfree(lcd->gamma_table); +err_alloc_gamma_table: + return ret; +} +#endif + +static int update_brightness(struct lcd_info *lcd, u8 force) +{ + int ret; + u32 brightness; + + mutex_lock(&lcd->bl_lock); + + brightness = lcd->bd->props.brightness; + + lcd->bl = (brightness - candela_table[0]) / 10; + + lcd->bl = (lcd->bl >= ARRAY_SIZE(candela_table)) ? 0 : lcd->bl; + + if ((force) || ((lcd->ldi_enable) && (lcd->current_bl != lcd->bl))) { + + ret = s6e8ax0_gamma_ctl(lcd); + + ret = s6e8ax0_set_acl(lcd); + + ret = s6e8ax0_set_elvss(lcd); + + lcd->current_bl = lcd->bl; + + dev_info(&lcd->ld->dev, "brightness=%d, bl=%d\n", brightness, lcd->bl); + } + + mutex_unlock(&lcd->bl_lock); + + return 0; +} + +static int s6e8ax0_ldi_init(struct lcd_info *lcd) +{ + int ret = 0; + + s6e8ax0_write(lcd, SEQ_APPLY_LEVEL_2_KEY, ARRAY_SIZE(SEQ_APPLY_LEVEL_2_KEY)); + s6e8ax0_write(lcd, SEQ_POWER_CONTROL, ARRAY_SIZE(SEQ_POWER_CONTROL)); + s6e8ax0_write(lcd, SEQ_SLEEP_OUT, ARRAY_SIZE(SEQ_SLEEP_OUT)); + msleep(22); /* 1 frame + 5ms */ + + s6e8ax0_write(lcd, SEQ_APPLY_MTP_KEY, ARRAY_SIZE(SEQ_APPLY_MTP_KEY)); + s6e8ax0_write(lcd, SEQ_PANEL_CONDITION_SET, ARRAY_SIZE(SEQ_PANEL_CONDITION_SET)); + s6e8ax0_write(lcd, SEQ_GAMMA_SELECT, ARRAY_SIZE(SEQ_GAMMA_SELECT)); + s6e8ax0_write(lcd, lcd->gamma_table[GAMMA_30CD], GAMMA_PARAM_SIZE); + s6e8ax0_write(lcd, SEQ_GAMMA_UPDATE, ARRAY_SIZE(SEQ_GAMMA_UPDATE)); + s6e8ax0_write(lcd, SEQ_ETC_PWRCTL, ARRAY_SIZE(SEQ_ETC_PWRCTL)); + s6e8ax0_write(lcd, SEQ_ETC_SOURCE_CONTROL, ARRAY_SIZE(SEQ_ETC_SOURCE_CONTROL)); + s6e8ax0_write(lcd, SEQ_ELVSS_DEFAULT, ARRAY_SIZE(SEQ_ELVSS_DEFAULT)); + s6e8ax0_write(lcd, SEQ_ETC_NVM_SETTING, ARRAY_SIZE(SEQ_ETC_NVM_SETTING)); + s6e8ax0_write(lcd, SEQ_ELVSS_ON, ARRAY_SIZE(SEQ_ELVSS_ON)); + s6e8ax0_write(lcd, SEQ_ELVSS_44, ARRAY_SIZE(SEQ_ELVSS_44)); + + s6e8ax0_write(lcd, SEQ_ACL_CUTOFF_40, ACL_PARAM_SIZE); + + s6e8ax0_write(lcd, SEQ_VREGOUT_SET, ARRAY_SIZE(SEQ_VREGOUT_SET)); + + return ret; +} + +static int s6e8ax0_ldi_enable(struct lcd_info *lcd) +{ + int ret = 0; + + s6e8ax0_write(lcd, SEQ_DISPLAY_ON, ARRAY_SIZE(SEQ_DISPLAY_ON)); + + return ret; +} + +static int s6e8ax0_ldi_disable(struct lcd_info *lcd) +{ + int ret = 0; + + s6e8ax0_write(lcd, SEQ_DISPLAY_OFF, ARRAY_SIZE(SEQ_DISPLAY_OFF)); + s6e8ax0_write(lcd, SEQ_STANDBY_ON, ARRAY_SIZE(SEQ_STANDBY_ON)); + + return ret; +} + +static int s6e8ax0_power_on(struct lcd_info *lcd) +{ + int ret = 0; + struct lcd_platform_data *pd = NULL; + pd = lcd->lcd_pd; + + /* dev_info(&lcd->ld->dev, "%s\n", __func__); */ + + ret = s6e8ax0_ldi_init(lcd); + if (ret) { + dev_err(&lcd->ld->dev, "failed to initialize ldi.\n"); + goto err; + } + + msleep(120); + + ret = s6e8ax0_ldi_enable(lcd); + if (ret) { + dev_err(&lcd->ld->dev, "failed to enable ldi.\n"); + goto err; + } + + lcd->ldi_enable = 1; + + update_brightness(lcd, 1); +err: + return ret; +} + +static int s6e8ax0_power_off(struct lcd_info *lcd) +{ + int ret = 0; + + dev_info(&lcd->ld->dev, "%s\n", __func__); + + lcd->ldi_enable = 0; + + ret = s6e8ax0_ldi_disable(lcd); + + msleep(120); + + return ret; +} + +static int s6e8ax0_power(struct lcd_info *lcd, int power) +{ + int ret = 0; + + if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) + ret = s6e8ax0_power_on(lcd); + else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) + ret = s6e8ax0_power_off(lcd); + + if (!ret) + lcd->power = power; + + return ret; +} + +static int s6e8ax0_set_power(struct lcd_device *ld, int power) +{ + struct lcd_info *lcd = lcd_get_data(ld); + + if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && + power != FB_BLANK_NORMAL) { + dev_err(&lcd->ld->dev, "power value should be 0, 1 or 4.\n"); + return -EINVAL; + } + + return s6e8ax0_power(lcd, power); +} + +static int s6e8ax0_get_power(struct lcd_device *ld) +{ + struct lcd_info *lcd = lcd_get_data(ld); + + return lcd->power; +} + +static int s6e8ax0_set_brightness(struct backlight_device *bd) +{ + int ret = 0; + int brightness = bd->props.brightness; + struct lcd_info *lcd = bl_get_data(bd); + + /* dev_info(&lcd->ld->dev, "%s: brightness=%d\n", __func__, brightness); */ + + if (brightness < MIN_BRIGHTNESS || + brightness > bd->props.max_brightness) { + dev_err(&bd->dev, "lcd brightness should be %d to %d. now %d\n", + MIN_BRIGHTNESS, MAX_BRIGHTNESS, brightness); + return -EINVAL; + } + + if (lcd->ldi_enable) { + ret = update_brightness(lcd, 0); + if (ret < 0) { + dev_err(lcd->dev, "err in %s\n", __func__); + return -EINVAL; + } + } + + return ret; +} + +static int s6e8ax0_get_brightness(struct backlight_device *bd) +{ + struct lcd_info *lcd = bl_get_data(bd); + + return candela_table[lcd->bl]; +} + +static struct lcd_ops s6e8ax0_lcd_ops = { + .set_power = s6e8ax0_set_power, + .get_power = s6e8ax0_get_power, +}; + +static const struct backlight_ops s6e8ax0_backlight_ops = { + .get_brightness = s6e8ax0_get_brightness, + .update_status = s6e8ax0_set_brightness, +}; + +static ssize_t lcd_type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + char temp[15]; + sprintf(temp, "SMD_AMS767KC01\n"); + strcat(buf, temp); + return strlen(buf); +} + +static DEVICE_ATTR(lcd_type, 0444, lcd_type_show, NULL); + +static ssize_t power_reduce_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + char temp[3]; + + sprintf(temp, "%d\n", lcd->acl_enable); + strcpy(buf, temp); + + return strlen(buf); +} + +static ssize_t power_reduce_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + int value; + int rc; + + rc = strict_strtoul(buf, (unsigned int)0, (unsigned long *)&value); + if (rc < 0) + return rc; + else { + if (lcd->acl_enable != value) { + dev_info(dev, "%s - %d, %d\n", __func__, lcd->acl_enable, value); + lcd->acl_enable = value; + if (lcd->ldi_enable) + s6e8ax0_set_acl(lcd); + } + } + return size; +} + +static DEVICE_ATTR(power_reduce, 0664, power_reduce_show, power_reduce_store); + +static ssize_t gamma_table_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + int i, j; + + for (i = 0; i < GAMMA_MAX; i++) { + for (j = 0; j < GAMMA_PARAM_SIZE; j++) + printk("0x%02x, ", lcd->gamma_table[i][j]); + printk("\n"); + } + + return strlen(buf); +} +static DEVICE_ATTR(gamma_table, 0444, gamma_table_show, NULL); + +#ifdef CONFIG_HAS_EARLYSUSPEND +struct lcd_info *g_lcd; + +void s6e8ax0_early_suspend(void) +{ + struct lcd_info *lcd = g_lcd; + + set_dsim_lcd_enabled(0); + + dev_info(&lcd->ld->dev, "+%s\n", __func__); + s6e8ax0_power(lcd, FB_BLANK_POWERDOWN); + dev_info(&lcd->ld->dev, "-%s\n", __func__); + + return ; +} + +void s6e8ax0_late_resume(void) +{ + struct lcd_info *lcd = g_lcd; + + dev_info(&lcd->ld->dev, "+%s\n", __func__); + s6e8ax0_power(lcd, FB_BLANK_UNBLANK); + dev_info(&lcd->ld->dev, "-%s\n", __func__); + + set_dsim_lcd_enabled(1); + + return ; +} +#endif + +static void s6e8ax0_read_id(struct lcd_info *lcd, u8 *buf) +{ + int ret = 0; + + ret = s6e8ax0_read(lcd, LDI_ID_REG, LDI_ID_LEN, buf, 3); + if (!ret) { + /* To protect ELVSS Wrong Operation */ + buf[0] = 0xA2; + buf[1] = 0x15; + buf[2] = 0x44; + lcd->connected = 0; + dev_info(&lcd->ld->dev, "panel is not connected well\n"); + } + + SEQ_VREGOUT_SET[1] = buf[0]; + SEQ_VREGOUT_SET[2] = buf[1]; + SEQ_VREGOUT_SET[3] = buf[2]; +} + +#ifdef SMART_DIMMING +static int s6e8ax0_read_mtp(struct lcd_info *lcd, u8 *mtp_data) +{ + int ret; + + ret = s6e8ax0_read(lcd, LDI_MTP_ADDR, LDI_MTP_LENGTH, mtp_data, 0); + + return ret; +} + +static void s6e8ab0_check_id(struct lcd_info *lcd, u8 *idbuf) +{ + u32 i; + + if ((idbuf[0] == 0xa2) && (idbuf[2] != 0x44)) + lcd->support_elvss = 1; + + if (lcd->support_elvss) { + lcd->elvss.limit = (idbuf[2] & 0xc0) >> 6; + lcd->elvss.reference = idbuf[2] & 0x3f; + lcd->elvss_cmd_length = 3; + printk(KERN_INFO "ID-3 is 0x%x support dynamic elvss\n", idbuf[2]); + printk(KERN_INFO "Dynamic ELVSS Information\n"); + printk(KERN_INFO "limit : %02x\n", lcd->elvss.limit); + } + + for (i = 0; i < LDI_ID_LEN; i++) + lcd->smart.panelid[i] = idbuf[i]; +} +#endif + +static int s6e8ax0_probe(struct device *dev) +{ + int ret = 0; + struct lcd_info *lcd; +#ifdef SMART_DIMMING + u8 mtp_data[LDI_MTP_LENGTH] = {0,}; +#endif + + lcd = kzalloc(sizeof(struct lcd_info), GFP_KERNEL); + if (!lcd) { + pr_err("failed to allocate for lcd\n"); + ret = -ENOMEM; + goto err_alloc; + } + + g_lcd = lcd; + + lcd->ld = lcd_device_register("panel", dev, lcd, &s6e8ax0_lcd_ops); + if (IS_ERR(lcd->ld)) { + pr_err("failed to register lcd device\n"); + ret = PTR_ERR(lcd->ld); + goto out_free_lcd; + } + + lcd->bd = backlight_device_register("panel", dev, lcd, &s6e8ax0_backlight_ops, NULL); + if (IS_ERR(lcd->bd)) { + pr_err("failed to register backlight device\n"); + ret = PTR_ERR(lcd->bd); + goto out_free_backlight; + } + + lcd->dev = dev; + lcd->dsim = (struct dsim_global *)dev_get_drvdata(dev->parent); + lcd->bd->props.max_brightness = MAX_BRIGHTNESS; + lcd->bd->props.brightness = DEFAULT_BRIGHTNESS; + lcd->bl = DEFAULT_GAMMA_LEVEL; + lcd->current_bl = lcd->bl; + + lcd->acl_enable = 0; + lcd->cur_acl = 0; + + lcd->power = FB_BLANK_UNBLANK; + lcd->ldi_enable = 1; + lcd->connected = 1; + + ret = device_create_file(&lcd->ld->dev, &dev_attr_power_reduce); + if (ret < 0) + dev_err(&lcd->ld->dev, "failed to add sysfs entries, %d\n", __LINE__); + + ret = device_create_file(&lcd->ld->dev, &dev_attr_lcd_type); + if (ret < 0) + dev_err(&lcd->ld->dev, "failed to add sysfs entries, %d\n", __LINE__); + + ret = device_create_file(&lcd->ld->dev, &dev_attr_gamma_table); + if (ret < 0) + dev_err(&lcd->ld->dev, "failed to add sysfs entries, %d\n", __LINE__); + + dev_set_drvdata(dev, lcd); + + mutex_init(&lcd->lock); + mutex_init(&lcd->bl_lock); + + s6e8ax0_read_id(lcd, lcd->id); + + dev_info(&lcd->ld->dev, "ID: %x, %x, %x\n", lcd->id[0], lcd->id[1], lcd->id[2]); + + dev_info(&lcd->ld->dev, "s6e8ab0 lcd panel driver has been probed.\n"); + + lcd->gamma_table = (unsigned char **)gamma22_table_sm2; + lcd->elvss_table = (unsigned char **)ELVSS_TABLE; + lcd->elvss_cmd_length = ELVSS_PARAM_SIZE; + +#ifdef SMART_DIMMING + s6e8ab0_check_id(lcd, lcd->id); + + init_table_info(&lcd->smart); + + ret = s6e8ax0_read_mtp(lcd, mtp_data); + if (!ret) { + printk(KERN_ERR "[LCD:ERROR] : %s read mtp failed\n", __func__); + /*return -EPERM;*/ + } + + calc_voltage_table(&lcd->smart, mtp_data); + + if (lcd->connected) { + ret = init_gamma_table(lcd); + if (lcd->support_elvss) + ret += init_elvss_table(lcd); + + if (ret) { + lcd->gamma_table = (unsigned char **)gamma22_table_sm2; + lcd->elvss_table = (unsigned char **)ELVSS_TABLE; + lcd->elvss_cmd_length = ELVSS_PARAM_SIZE; + } + } + + update_brightness(lcd, 1); +#endif + + return 0; + +out_free_backlight: + lcd_device_unregister(lcd->ld); + kfree(lcd); + return ret; + +out_free_lcd: + kfree(lcd); + return ret; + +err_alloc: + return ret; +} + +static int __devexit s6e8ax0_remove(struct device *dev) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + + s6e8ax0_power(lcd, FB_BLANK_POWERDOWN); + lcd_device_unregister(lcd->ld); + backlight_device_unregister(lcd->bd); + kfree(lcd); + + return 0; +} + +/* Power down all displays on reboot, poweroff or halt. */ +static void s6e8ax0_shutdown(struct device *dev) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + + dev_info(&lcd->ld->dev, "%s\n", __func__); + + s6e8ax0_power(lcd, FB_BLANK_POWERDOWN); +} + +static struct mipi_lcd_driver s6e8ax0_mipi_driver = { + .name = "s6e8ab0", + .probe = s6e8ax0_probe, + .remove = __devexit_p(s6e8ax0_remove), + .shutdown = s6e8ax0_shutdown, +}; + +static int s6e8ax0_init(void) +{ + return s5p_dsim_register_lcd_driver(&s6e8ax0_mipi_driver); +} + +static void s6e8ax0_exit(void) +{ + return; +} + +module_init(s6e8ax0_init); +module_exit(s6e8ax0_exit); + +MODULE_DESCRIPTION("MIPI-DSI S6E8AB0:AMS767KC01 (1280x800) Panel Driver"); +MODULE_LICENSE("GPL"); |