OMAPDSS: Add new simple DPI panel driver
Add simple DPI Panel driver which uses the new DSS device model and DSS ops. A "simple" panel means one that does not require any special setup. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen
parent
61a7f24a3f
commit
04f0ff022d
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@ -28,4 +28,9 @@ config DISPLAY_CONNECTOR_ANALOG_TV
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help
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Driver for a generic analog TV connector.
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config DISPLAY_PANEL_DPI
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tristate "Generic DPI panel"
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help
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Driver for generic DPI panels.
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endmenu
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@ -3,3 +3,4 @@ obj-$(CONFIG_DISPLAY_ENCODER_TPD12S015) += encoder-tpd12s015.o
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obj-$(CONFIG_DISPLAY_CONNECTOR_DVI) += connector-dvi.o
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obj-$(CONFIG_DISPLAY_CONNECTOR_HDMI) += connector-hdmi.o
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obj-$(CONFIG_DISPLAY_CONNECTOR_ANALOG_TV) += connector-analog-tv.o
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obj-$(CONFIG_DISPLAY_PANEL_DPI) += panel-dpi.o
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@ -0,0 +1,270 @@
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/*
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* Generic MIPI DPI Panel Driver
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*
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* Copyright (C) 2013 Texas Instruments
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* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <video/omapdss.h>
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#include <video/omap-panel-data.h>
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struct panel_drv_data {
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struct omap_dss_device dssdev;
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struct omap_dss_device *in;
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int data_lines;
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struct omap_video_timings videomode;
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int backlight_gpio;
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int enable_gpio;
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};
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#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
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static int panel_dpi_connect(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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int r;
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if (omapdss_device_is_connected(dssdev))
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return 0;
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r = in->ops.dpi->connect(in, dssdev);
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if (r)
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return r;
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return 0;
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}
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static void panel_dpi_disconnect(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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if (!omapdss_device_is_connected(dssdev))
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return;
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in->ops.dpi->disconnect(in, dssdev);
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}
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static int panel_dpi_enable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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int r;
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if (!omapdss_device_is_connected(dssdev))
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return -ENODEV;
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if (omapdss_device_is_enabled(dssdev))
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return 0;
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in->ops.dpi->set_data_lines(in, ddata->data_lines);
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in->ops.dpi->set_timings(in, &ddata->videomode);
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r = in->ops.dpi->enable(in);
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if (r)
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return r;
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if (gpio_is_valid(ddata->enable_gpio))
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gpio_set_value_cansleep(ddata->enable_gpio, 1);
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if (gpio_is_valid(ddata->backlight_gpio))
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gpio_set_value_cansleep(ddata->backlight_gpio, 1);
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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return 0;
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}
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static void panel_dpi_disable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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if (!omapdss_device_is_enabled(dssdev))
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return;
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if (gpio_is_valid(ddata->enable_gpio))
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gpio_set_value_cansleep(ddata->enable_gpio, 0);
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if (gpio_is_valid(ddata->backlight_gpio))
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gpio_set_value_cansleep(ddata->backlight_gpio, 0);
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in->ops.dpi->disable(in);
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dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
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}
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static void panel_dpi_set_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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ddata->videomode = *timings;
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dssdev->panel.timings = *timings;
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in->ops.dpi->set_timings(in, timings);
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}
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static void panel_dpi_get_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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*timings = ddata->videomode;
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}
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static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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return in->ops.dpi->check_timings(in, timings);
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}
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static struct omap_dss_driver panel_dpi_ops = {
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.connect = panel_dpi_connect,
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.disconnect = panel_dpi_disconnect,
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.enable = panel_dpi_enable,
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.disable = panel_dpi_disable,
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.set_timings = panel_dpi_set_timings,
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.get_timings = panel_dpi_get_timings,
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.check_timings = panel_dpi_check_timings,
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.get_resolution = omapdss_default_get_resolution,
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};
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static int panel_dpi_probe_pdata(struct platform_device *pdev)
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{
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const struct panel_dpi_platform_data *pdata;
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struct panel_drv_data *ddata = platform_get_drvdata(pdev);
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struct omap_dss_device *dssdev, *in;
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struct videomode vm;
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pdata = dev_get_platdata(&pdev->dev);
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in = omap_dss_find_output(pdata->source);
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if (in == NULL) {
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dev_err(&pdev->dev, "failed to find video source '%s'\n",
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pdata->source);
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return -EPROBE_DEFER;
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}
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ddata->in = in;
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ddata->data_lines = pdata->data_lines;
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videomode_from_timing(pdata->display_timing, &vm);
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videomode_to_omap_video_timings(&vm, &ddata->videomode);
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dssdev = &ddata->dssdev;
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dssdev->name = pdata->name;
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ddata->enable_gpio = pdata->enable_gpio;
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ddata->backlight_gpio = pdata->backlight_gpio;
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return 0;
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}
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static int panel_dpi_probe(struct platform_device *pdev)
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{
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struct panel_drv_data *ddata;
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struct omap_dss_device *dssdev;
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int r;
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ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
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if (ddata == NULL)
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return -ENOMEM;
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platform_set_drvdata(pdev, ddata);
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if (dev_get_platdata(&pdev->dev)) {
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r = panel_dpi_probe_pdata(pdev);
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if (r)
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return r;
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} else {
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return -ENODEV;
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}
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if (gpio_is_valid(ddata->enable_gpio)) {
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r = devm_gpio_request_one(&pdev->dev, ddata->enable_gpio,
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GPIOF_OUT_INIT_LOW, "panel enable");
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if (r)
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goto err_gpio;
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}
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if (gpio_is_valid(ddata->backlight_gpio)) {
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r = devm_gpio_request_one(&pdev->dev, ddata->backlight_gpio,
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GPIOF_OUT_INIT_LOW, "panel backlight");
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if (r)
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goto err_gpio;
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}
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dssdev = &ddata->dssdev;
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dssdev->dev = &pdev->dev;
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dssdev->driver = &panel_dpi_ops;
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dssdev->type = OMAP_DISPLAY_TYPE_DPI;
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dssdev->owner = THIS_MODULE;
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dssdev->panel.timings = ddata->videomode;
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dssdev->phy.dpi.data_lines = ddata->data_lines;
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r = omapdss_register_display(dssdev);
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if (r) {
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dev_err(&pdev->dev, "Failed to register panel\n");
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goto err_reg;
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}
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return 0;
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err_reg:
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err_gpio:
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omap_dss_put_device(ddata->in);
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return r;
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}
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static int __exit panel_dpi_remove(struct platform_device *pdev)
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{
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struct panel_drv_data *ddata = platform_get_drvdata(pdev);
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struct omap_dss_device *dssdev = &ddata->dssdev;
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struct omap_dss_device *in = ddata->in;
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omapdss_unregister_display(dssdev);
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panel_dpi_disable(dssdev);
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panel_dpi_disconnect(dssdev);
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omap_dss_put_device(in);
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return 0;
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}
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static struct platform_driver panel_dpi_driver = {
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.probe = panel_dpi_probe,
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.remove = __exit_p(panel_dpi_remove),
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.driver = {
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.name = "panel-dpi",
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.owner = THIS_MODULE,
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},
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};
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module_platform_driver(panel_dpi_driver);
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MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
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MODULE_DESCRIPTION("Generic MIPI DPI Panel Driver");
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MODULE_LICENSE("GPL");
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@ -27,6 +27,8 @@
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#ifndef __OMAP_PANEL_DATA_H
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#define __OMAP_PANEL_DATA_H
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#include <video/display_timing.h>
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struct omap_dss_device;
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/**
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@ -213,4 +215,25 @@ struct connector_atv_platform_data {
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bool invert_polarity;
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};
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/**
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* panel_dpi platform data
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* @name: name for this display entity
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* @source: name of the display entity used as a video source
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* @data_lines: number of DPI datalines
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* @display_timing: timings for this panel
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* @backlight_gpio: gpio to enable/disable the backlight (or -1)
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* @enable_gpio: gpio to enable/disable the panel (or -1)
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*/
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struct panel_dpi_platform_data {
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const char *name;
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const char *source;
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int data_lines;
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const struct display_timing *display_timing;
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int backlight_gpio;
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int enable_gpio;
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};
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#endif /* __OMAP_PANEL_DATA_H */
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