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