| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * HDMI Connector driver |
| * |
| * Copyright (C) 2013 Texas Instruments |
| * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> |
| */ |
| |
| #include <linux/err.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/of.h> |
| |
| #include <drm/drm_edid.h> |
| |
| #include <video/omapfb_dss.h> |
| |
| static const struct omap_video_timings hdmic_default_timings = { |
| .x_res = 640, |
| .y_res = 480, |
| .pixelclock = 25175000, |
| .hsw = 96, |
| .hfp = 16, |
| .hbp = 48, |
| .vsw = 2, |
| .vfp = 11, |
| .vbp = 31, |
| |
| .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| |
| .interlace = false, |
| }; |
| |
| struct panel_drv_data { |
| struct omap_dss_device dssdev; |
| struct omap_dss_device *in; |
| |
| struct device *dev; |
| |
| struct omap_video_timings timings; |
| |
| struct gpio_desc *hpd_gpio; |
| }; |
| |
| #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev) |
| |
| static int hdmic_connect(struct omap_dss_device *dssdev) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| dev_dbg(ddata->dev, "connect\n"); |
| |
| if (omapdss_device_is_connected(dssdev)) |
| return 0; |
| |
| return in->ops.hdmi->connect(in, dssdev); |
| } |
| |
| static void hdmic_disconnect(struct omap_dss_device *dssdev) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| dev_dbg(ddata->dev, "disconnect\n"); |
| |
| if (!omapdss_device_is_connected(dssdev)) |
| return; |
| |
| in->ops.hdmi->disconnect(in, dssdev); |
| } |
| |
| static int hdmic_enable(struct omap_dss_device *dssdev) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| int r; |
| |
| dev_dbg(ddata->dev, "enable\n"); |
| |
| if (!omapdss_device_is_connected(dssdev)) |
| return -ENODEV; |
| |
| if (omapdss_device_is_enabled(dssdev)) |
| return 0; |
| |
| in->ops.hdmi->set_timings(in, &ddata->timings); |
| |
| r = in->ops.hdmi->enable(in); |
| if (r) |
| return r; |
| |
| dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| |
| return r; |
| } |
| |
| static void hdmic_disable(struct omap_dss_device *dssdev) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| dev_dbg(ddata->dev, "disable\n"); |
| |
| if (!omapdss_device_is_enabled(dssdev)) |
| return; |
| |
| in->ops.hdmi->disable(in); |
| |
| dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| } |
| |
| static void hdmic_set_timings(struct omap_dss_device *dssdev, |
| struct omap_video_timings *timings) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| ddata->timings = *timings; |
| dssdev->panel.timings = *timings; |
| |
| in->ops.hdmi->set_timings(in, timings); |
| } |
| |
| static void hdmic_get_timings(struct omap_dss_device *dssdev, |
| struct omap_video_timings *timings) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| |
| *timings = ddata->timings; |
| } |
| |
| static int hdmic_check_timings(struct omap_dss_device *dssdev, |
| struct omap_video_timings *timings) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| return in->ops.hdmi->check_timings(in, timings); |
| } |
| |
| static int hdmic_read_edid(struct omap_dss_device *dssdev, |
| u8 *edid, int len) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| return in->ops.hdmi->read_edid(in, edid, len); |
| } |
| |
| static bool hdmic_detect(struct omap_dss_device *dssdev) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| if (ddata->hpd_gpio) |
| return gpiod_get_value_cansleep(ddata->hpd_gpio); |
| else |
| return in->ops.hdmi->detect(in); |
| } |
| |
| static int hdmic_set_hdmi_mode(struct omap_dss_device *dssdev, bool hdmi_mode) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode); |
| } |
| |
| static int hdmic_set_infoframe(struct omap_dss_device *dssdev, |
| const struct hdmi_avi_infoframe *avi) |
| { |
| struct panel_drv_data *ddata = to_panel_data(dssdev); |
| struct omap_dss_device *in = ddata->in; |
| |
| return in->ops.hdmi->set_infoframe(in, avi); |
| } |
| |
| static struct omap_dss_driver hdmic_driver = { |
| .connect = hdmic_connect, |
| .disconnect = hdmic_disconnect, |
| |
| .enable = hdmic_enable, |
| .disable = hdmic_disable, |
| |
| .set_timings = hdmic_set_timings, |
| .get_timings = hdmic_get_timings, |
| .check_timings = hdmic_check_timings, |
| |
| .get_resolution = omapdss_default_get_resolution, |
| |
| .read_edid = hdmic_read_edid, |
| .detect = hdmic_detect, |
| .set_hdmi_mode = hdmic_set_hdmi_mode, |
| .set_hdmi_infoframe = hdmic_set_infoframe, |
| }; |
| |
| static int hdmic_probe(struct platform_device *pdev) |
| { |
| struct panel_drv_data *ddata; |
| struct omap_dss_device *dssdev; |
| int r; |
| |
| if (!pdev->dev.of_node) |
| return -ENODEV; |
| |
| ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); |
| if (!ddata) |
| return -ENOMEM; |
| |
| platform_set_drvdata(pdev, ddata); |
| ddata->dev = &pdev->dev; |
| |
| ddata->hpd_gpio = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); |
| r = PTR_ERR_OR_ZERO(ddata->hpd_gpio); |
| if (r) |
| return r; |
| |
| gpiod_set_consumer_name(ddata->hpd_gpio, "hdmi_hpd"); |
| |
| ddata->in = omapdss_of_find_source_for_first_ep(pdev->dev.of_node); |
| r = PTR_ERR_OR_ZERO(ddata->in); |
| if (r) { |
| dev_err(&pdev->dev, "failed to find video source\n"); |
| return r; |
| } |
| |
| ddata->timings = hdmic_default_timings; |
| |
| dssdev = &ddata->dssdev; |
| dssdev->driver = &hdmic_driver; |
| dssdev->dev = &pdev->dev; |
| dssdev->type = OMAP_DISPLAY_TYPE_HDMI; |
| dssdev->owner = THIS_MODULE; |
| dssdev->panel.timings = hdmic_default_timings; |
| |
| r = omapdss_register_display(dssdev); |
| if (r) { |
| dev_err(&pdev->dev, "Failed to register panel\n"); |
| goto err_reg; |
| } |
| |
| return 0; |
| err_reg: |
| omap_dss_put_device(ddata->in); |
| return r; |
| } |
| |
| static void hdmic_remove(struct platform_device *pdev) |
| { |
| struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| struct omap_dss_device *dssdev = &ddata->dssdev; |
| struct omap_dss_device *in = ddata->in; |
| |
| omapdss_unregister_display(&ddata->dssdev); |
| |
| hdmic_disable(dssdev); |
| hdmic_disconnect(dssdev); |
| |
| omap_dss_put_device(in); |
| } |
| |
| static const struct of_device_id hdmic_of_match[] = { |
| { .compatible = "omapdss,hdmi-connector", }, |
| {}, |
| }; |
| |
| MODULE_DEVICE_TABLE(of, hdmic_of_match); |
| |
| static struct platform_driver hdmi_connector_driver = { |
| .probe = hdmic_probe, |
| .remove_new = hdmic_remove, |
| .driver = { |
| .name = "connector-hdmi", |
| .of_match_table = hdmic_of_match, |
| }, |
| }; |
| |
| module_platform_driver(hdmi_connector_driver); |
| |
| MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); |
| MODULE_DESCRIPTION("HDMI Connector driver"); |
| MODULE_LICENSE("GPL"); |