diff options
Diffstat (limited to 'drivers/video/omap2/displays/panel-tfp410.c')
-rw-r--r-- | drivers/video/omap2/displays/panel-tfp410.c | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/drivers/video/omap2/displays/panel-tfp410.c b/drivers/video/omap2/displays/panel-tfp410.c deleted file mode 100644 index 1fdfb158a2a9..000000000000 --- a/drivers/video/omap2/displays/panel-tfp410.c +++ /dev/null @@ -1,353 +0,0 @@ -/* - * TFP410 DPI-to-DVI chip - * - * Copyright (C) 2011 Texas Instruments Inc - * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> - * - * 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. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <linux/module.h> -#include <linux/slab.h> -#include <video/omapdss.h> -#include <linux/i2c.h> -#include <linux/gpio.h> -#include <drm/drm_edid.h> - -#include <video/omap-panel-data.h> - -static const struct omap_video_timings tfp410_default_timings = { - .x_res = 640, - .y_res = 480, - - .pixel_clock = 23500, - - .hfp = 48, - .hsw = 32, - .hbp = 80, - - .vfp = 3, - .vsw = 4, - .vbp = 7, - - .vsync_level = OMAPDSS_SIG_ACTIVE_HIGH, - .hsync_level = OMAPDSS_SIG_ACTIVE_HIGH, - .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, - .de_level = OMAPDSS_SIG_ACTIVE_HIGH, - .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES, -}; - -struct panel_drv_data { - struct omap_dss_device *dssdev; - - struct mutex lock; - - int pd_gpio; - - struct i2c_adapter *i2c_adapter; -}; - -static int tfp410_power_on(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - int r; - - if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) - return 0; - - omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings); - omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines); - - r = omapdss_dpi_display_enable(dssdev); - if (r) - goto err0; - - if (gpio_is_valid(ddata->pd_gpio)) - gpio_set_value_cansleep(ddata->pd_gpio, 1); - - return 0; -err0: - return r; -} - -static void tfp410_power_off(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - - if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) - return; - - if (gpio_is_valid(ddata->pd_gpio)) - gpio_set_value_cansleep(ddata->pd_gpio, 0); - - omapdss_dpi_display_disable(dssdev); -} - -static int tfp410_probe(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata; - int r; - int i2c_bus_num; - - ddata = devm_kzalloc(dssdev->dev, sizeof(*ddata), GFP_KERNEL); - if (!ddata) - return -ENOMEM; - - dssdev->panel.timings = tfp410_default_timings; - - ddata->dssdev = dssdev; - mutex_init(&ddata->lock); - - if (dssdev->data) { - struct tfp410_platform_data *pdata = dssdev->data; - - ddata->pd_gpio = pdata->power_down_gpio; - i2c_bus_num = pdata->i2c_bus_num; - } else { - ddata->pd_gpio = -1; - i2c_bus_num = -1; - } - - if (gpio_is_valid(ddata->pd_gpio)) { - r = devm_gpio_request_one(dssdev->dev, ddata->pd_gpio, - GPIOF_OUT_INIT_LOW, "tfp410 pd"); - if (r) { - dev_err(dssdev->dev, "Failed to request PD GPIO %d\n", - ddata->pd_gpio); - return r; - } - } - - if (i2c_bus_num != -1) { - struct i2c_adapter *adapter; - - adapter = i2c_get_adapter(i2c_bus_num); - if (!adapter) { - dev_err(dssdev->dev, "Failed to get I2C adapter, bus %d\n", - i2c_bus_num); - return -EPROBE_DEFER; - } - - ddata->i2c_adapter = adapter; - } - - dev_set_drvdata(dssdev->dev, ddata); - - return 0; -} - -static void __exit tfp410_remove(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - - mutex_lock(&ddata->lock); - - if (ddata->i2c_adapter) - i2c_put_adapter(ddata->i2c_adapter); - - dev_set_drvdata(dssdev->dev, NULL); - - mutex_unlock(&ddata->lock); -} - -static int tfp410_enable(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - int r; - - mutex_lock(&ddata->lock); - - r = tfp410_power_on(dssdev); - if (r == 0) - dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; - - mutex_unlock(&ddata->lock); - - return r; -} - -static void tfp410_disable(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - - mutex_lock(&ddata->lock); - - tfp410_power_off(dssdev); - - dssdev->state = OMAP_DSS_DISPLAY_DISABLED; - - mutex_unlock(&ddata->lock); -} - -static void tfp410_set_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - - mutex_lock(&ddata->lock); - omapdss_dpi_set_timings(dssdev, timings); - dssdev->panel.timings = *timings; - mutex_unlock(&ddata->lock); -} - -static void tfp410_get_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - - mutex_lock(&ddata->lock); - *timings = dssdev->panel.timings; - mutex_unlock(&ddata->lock); -} - -static int tfp410_check_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - int r; - - mutex_lock(&ddata->lock); - r = dpi_check_timings(dssdev, timings); - mutex_unlock(&ddata->lock); - - return r; -} - - -static int tfp410_ddc_read(struct i2c_adapter *adapter, - unsigned char *buf, u16 count, u8 offset) -{ - int r, retries; - - for (retries = 3; retries > 0; retries--) { - struct i2c_msg msgs[] = { - { - .addr = DDC_ADDR, - .flags = 0, - .len = 1, - .buf = &offset, - }, { - .addr = DDC_ADDR, - .flags = I2C_M_RD, - .len = count, - .buf = buf, - } - }; - - r = i2c_transfer(adapter, msgs, 2); - if (r == 2) - return 0; - - if (r != -EAGAIN) - break; - } - - return r < 0 ? r : -EIO; -} - -static int tfp410_read_edid(struct omap_dss_device *dssdev, - u8 *edid, int len) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - int r, l, bytes_read; - - mutex_lock(&ddata->lock); - - if (!ddata->i2c_adapter) { - r = -ENODEV; - goto err; - } - - l = min(EDID_LENGTH, len); - r = tfp410_ddc_read(ddata->i2c_adapter, edid, l, 0); - if (r) - goto err; - - bytes_read = l; - - /* if there are extensions, read second block */ - if (len > EDID_LENGTH && edid[0x7e] > 0) { - l = min(EDID_LENGTH, len - EDID_LENGTH); - - r = tfp410_ddc_read(ddata->i2c_adapter, edid + EDID_LENGTH, - l, EDID_LENGTH); - if (r) - goto err; - - bytes_read += l; - } - - mutex_unlock(&ddata->lock); - - return bytes_read; - -err: - mutex_unlock(&ddata->lock); - return r; -} - -static bool tfp410_detect(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev); - unsigned char out; - int r; - - mutex_lock(&ddata->lock); - - if (!ddata->i2c_adapter) - goto out; - - r = tfp410_ddc_read(ddata->i2c_adapter, &out, 1, 0); - - mutex_unlock(&ddata->lock); - - return r == 0; - -out: - mutex_unlock(&ddata->lock); - return true; -} - -static struct omap_dss_driver tfp410_driver = { - .probe = tfp410_probe, - .remove = __exit_p(tfp410_remove), - - .enable = tfp410_enable, - .disable = tfp410_disable, - - .set_timings = tfp410_set_timings, - .get_timings = tfp410_get_timings, - .check_timings = tfp410_check_timings, - - .read_edid = tfp410_read_edid, - .detect = tfp410_detect, - - .driver = { - .name = "tfp410", - .owner = THIS_MODULE, - }, -}; - -static int __init tfp410_init(void) -{ - return omap_dss_register_driver(&tfp410_driver); -} - -static void __exit tfp410_exit(void) -{ - omap_dss_unregister_driver(&tfp410_driver); -} - -module_init(tfp410_init); -module_exit(tfp410_exit); -MODULE_LICENSE("GPL"); |