diff options
Diffstat (limited to 'drivers/video/mcde/display-samsung_s6d16d0.c')
| -rw-r--r-- | drivers/video/mcde/display-samsung_s6d16d0.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/drivers/video/mcde/display-samsung_s6d16d0.c b/drivers/video/mcde/display-samsung_s6d16d0.c new file mode 100644 index 00000000000..900c3f70aa6 --- /dev/null +++ b/drivers/video/mcde/display-samsung_s6d16d0.c @@ -0,0 +1,232 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * ST-Ericsson MCDE Samsung S6D16D0 display driver + * + * Author: Marcus Lorentzon <marcus.xm.lorentzon@stericsson.com> + * for ST-Ericsson. + * + * License terms: GNU General Public License (GPL), version 2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/regulator/consumer.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/err.h> + +#include <video/mcde_display.h> + +#define RESET_DURATION_US 10 +#define RESET_DELAY_MS 120 +#define SLEEP_OUT_DELAY_MS 120 +#define IO_REGU "vdd1" +#define IO_REGU_MIN 1650000 +#define IO_REGU_MAX 3300000 + +#define DSI_HS_FREQ_HZ 420160000 +#define DSI_LP_FREQ_HZ 19200000 + +struct device_info { + int reset_gpio; + struct mcde_port port; + struct regulator *regulator; +}; + +static inline struct device_info *get_drvdata(struct mcde_display_device *ddev) +{ + return (struct device_info *)dev_get_drvdata(&ddev->dev); +} + +static int power_on(struct mcde_display_device *ddev) +{ + struct device_info *di = get_drvdata(ddev); + + dev_dbg(&ddev->dev, "Reset & power on s6d16d0 display\n"); + + regulator_enable(di->regulator); + gpio_set_value_cansleep(di->reset_gpio, 0); + udelay(RESET_DURATION_US); + gpio_set_value_cansleep(di->reset_gpio, 1); + msleep(RESET_DELAY_MS); + + return 0; +} + +static int power_off(struct mcde_display_device *ddev) +{ + struct device_info *di = get_drvdata(ddev); + + dev_dbg(&ddev->dev, "Power off s6d16d0 display\n"); + + regulator_disable(di->regulator); + + return 0; +} + +static int display_on(struct mcde_display_device *ddev) +{ + int ret; + u8 val = 0; + + dev_dbg(&ddev->dev, "Display on s6d16d0\n"); + + ret = mcde_dsi_dcs_write(ddev->chnl_state, + DCS_CMD_SET_TEAR_ON, &val, 1); + if (ret) + dev_warn(&ddev->dev, + "%s:Failed to enable synchronized update\n", __func__); + + ret = mcde_dsi_dcs_write(ddev->chnl_state, DCS_CMD_EXIT_SLEEP_MODE, + NULL, 0); + if (ret) + return ret; + msleep(SLEEP_OUT_DELAY_MS); + return mcde_dsi_dcs_write(ddev->chnl_state, DCS_CMD_SET_DISPLAY_ON, + NULL, 0); +} + +static int display_off(struct mcde_display_device *ddev) +{ + int ret; + + dev_dbg(&ddev->dev, "Display off s6d16d0\n"); + + ret = mcde_dsi_dcs_write(ddev->chnl_state, DCS_CMD_SET_DISPLAY_OFF, + NULL, 0); + if (ret) + return ret; + + return mcde_dsi_dcs_write(ddev->chnl_state, DCS_CMD_ENTER_SLEEP_MODE, + NULL, 0); +} + +static int set_power_mode(struct mcde_display_device *ddev, + enum mcde_display_power_mode power_mode) +{ + int ret = 0; + + dev_dbg(&ddev->dev, "Set power mode %d\n", power_mode); + + /* OFF -> STANDBY */ + if (ddev->power_mode == MCDE_DISPLAY_PM_OFF && + power_mode != MCDE_DISPLAY_PM_OFF) { + ret = power_on(ddev); + if (ret) + return ret; + ddev->power_mode = MCDE_DISPLAY_PM_STANDBY; + } + + /* STANDBY -> ON */ + if (ddev->power_mode == MCDE_DISPLAY_PM_STANDBY && + power_mode == MCDE_DISPLAY_PM_ON) { + + ret = display_on(ddev); + if (ret) + return ret; + ddev->power_mode = MCDE_DISPLAY_PM_ON; + } + /* ON -> STANDBY */ + else if (ddev->power_mode == MCDE_DISPLAY_PM_ON && + power_mode <= MCDE_DISPLAY_PM_STANDBY) { + + ret = display_off(ddev); + if (ret) + return ret; + ddev->power_mode = MCDE_DISPLAY_PM_STANDBY; + } + + /* STANDBY -> OFF */ + if (ddev->power_mode == MCDE_DISPLAY_PM_STANDBY && + power_mode == MCDE_DISPLAY_PM_OFF) { + ret = power_off(ddev); + if (ret) + return ret; + ddev->power_mode = MCDE_DISPLAY_PM_OFF; + } + + return mcde_chnl_set_power_mode(ddev->chnl_state, ddev->power_mode); +} + +static int __devinit samsung_s6d16d0_probe(struct mcde_display_device *ddev) +{ + int ret = 0; + struct mcde_display_dsi_platform_data *pdata = ddev->dev.platform_data; + struct device_info *di; + + if (pdata == NULL || !pdata->reset_gpio) { + dev_err(&ddev->dev, "Invalid platform data\n"); + return -EINVAL; + } + + di = kzalloc(sizeof(*di), GFP_KERNEL); + if (!di) + return -ENOMEM; + di->reset_gpio = pdata->reset_gpio; + di->port.link = pdata->link; + di->port.type = MCDE_PORTTYPE_DSI; + di->port.mode = MCDE_PORTMODE_CMD; + di->port.pixel_format = MCDE_PORTPIXFMT_DSI_24BPP; + di->port.sync_src = ddev->port->sync_src; + di->port.frame_trig = ddev->port->frame_trig; + di->port.phy.dsi.num_data_lanes = 2; + di->port.phy.dsi.host_eot_gen = true; + /* TODO: Move UI to mcde_hw.c when clk_get_rate(dsi) is done */ + di->port.phy.dsi.ui = 9; + di->port.phy.dsi.hs_freq = DSI_HS_FREQ_HZ; + di->port.phy.dsi.lp_freq = DSI_LP_FREQ_HZ; + + ret = gpio_request(di->reset_gpio, NULL); + if (ret) + goto gpio_request_failed; + gpio_direction_output(di->reset_gpio, 1); + di->regulator = regulator_get(&ddev->dev, IO_REGU); + if (IS_ERR(di->regulator)) { + di->regulator = NULL; + goto regulator_get_failed; + } + ret = regulator_set_voltage(di->regulator, IO_REGU_MIN, IO_REGU_MAX); + if (WARN_ON(ret)) + goto regulator_voltage_failed; + + /* Get in sync with u-boot */ + if (ddev->power_mode != MCDE_DISPLAY_PM_OFF) + (void)regulator_enable(di->regulator); + + ddev->set_power_mode = set_power_mode; + ddev->port = &di->port; + ddev->native_x_res = 864; + ddev->native_y_res = 480; + dev_set_drvdata(&ddev->dev, di); + + dev_info(&ddev->dev, "Samsung s6d16d0 display probed\n"); + + return 0; +regulator_voltage_failed: + regulator_put(di->regulator); +regulator_get_failed: + gpio_free(di->reset_gpio); +gpio_request_failed: + kfree(di); + return ret; +} + +static struct mcde_display_driver samsung_s6d16d0_driver = { + .probe = samsung_s6d16d0_probe, + .driver = { + .name = "samsung_s6d16d0", + }, +}; + +static int __init samsung_s6d16d0_init(void) +{ + return mcde_display_driver_register(&samsung_s6d16d0_driver); +} +module_init(samsung_s6d16d0_init); + +MODULE_AUTHOR("Marcus Lorentzon <marcus.xm.lorentzon@stericsson.com>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("ST-Ericsson MCDE Samsung S6D16D0 display driver"); |