Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jyri Sarha | 974 | 53.14% | 1 | 3.45% |
Laurent Pinchart | 627 | 34.21% | 8 | 27.59% |
Christopher Spinrath | 75 | 4.09% | 1 | 3.45% |
Peter Ujfalusi | 60 | 3.27% | 2 | 6.90% |
Tomi Valkeinen | 48 | 2.62% | 2 | 6.90% |
Ricardo Cañuelo | 18 | 0.98% | 2 | 6.90% |
Daniel Vetter | 8 | 0.44% | 4 | 13.79% |
Uwe Kleine-König | 7 | 0.38% | 3 | 10.34% |
Andrzej Pietrasiewicz | 5 | 0.27% | 1 | 3.45% |
Sam Ravnborg | 4 | 0.22% | 1 | 3.45% |
Boris Brezillon | 3 | 0.16% | 1 | 3.45% |
Thomas Gleixner | 2 | 0.11% | 1 | 3.45% |
Geert Uytterhoeven | 1 | 0.05% | 1 | 3.45% |
Wei Yongjun | 1 | 0.05% | 1 | 3.45% |
Total | 1833 | 29 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2016 Texas Instruments * Author: Jyri Sarha <jsarha@ti.com> */ #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/media-bus-format.h> #include <linux/module.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/workqueue.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_crtc.h> #include <drm/drm_edid.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> #define HOTPLUG_DEBOUNCE_MS 1100 struct tfp410 { struct drm_bridge bridge; struct drm_connector connector; u32 bus_format; struct delayed_work hpd_work; struct gpio_desc *powerdown; struct drm_bridge_timings timings; struct drm_bridge *next_bridge; struct device *dev; }; static inline struct tfp410 * drm_bridge_to_tfp410(struct drm_bridge *bridge) { return container_of(bridge, struct tfp410, bridge); } static inline struct tfp410 * drm_connector_to_tfp410(struct drm_connector *connector) { return container_of(connector, struct tfp410, connector); } static int tfp410_get_modes(struct drm_connector *connector) { struct tfp410 *dvi = drm_connector_to_tfp410(connector); struct edid *edid; int ret; if (dvi->next_bridge->ops & DRM_BRIDGE_OP_EDID) { edid = drm_bridge_get_edid(dvi->next_bridge, connector); if (!edid) DRM_INFO("EDID read failed. Fallback to standard modes\n"); } else { edid = NULL; } if (!edid) { /* * No EDID, fallback on the XGA standard modes and prefer a mode * pretty much anything can handle. */ ret = drm_add_modes_noedid(connector, 1920, 1200); drm_set_preferred_mode(connector, 1024, 768); return ret; } drm_connector_update_edid_property(connector, edid); ret = drm_add_edid_modes(connector, edid); kfree(edid); return ret; } static const struct drm_connector_helper_funcs tfp410_con_helper_funcs = { .get_modes = tfp410_get_modes, }; static enum drm_connector_status tfp410_connector_detect(struct drm_connector *connector, bool force) { struct tfp410 *dvi = drm_connector_to_tfp410(connector); return drm_bridge_detect(dvi->next_bridge); } static const struct drm_connector_funcs tfp410_con_funcs = { .detect = tfp410_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static void tfp410_hpd_work_func(struct work_struct *work) { struct tfp410 *dvi; dvi = container_of(work, struct tfp410, hpd_work.work); if (dvi->bridge.dev) drm_helper_hpd_irq_event(dvi->bridge.dev); } static void tfp410_hpd_callback(void *arg, enum drm_connector_status status) { struct tfp410 *dvi = arg; mod_delayed_work(system_wq, &dvi->hpd_work, msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS)); } static int tfp410_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); int ret; ret = drm_bridge_attach(bridge->encoder, dvi->next_bridge, bridge, DRM_BRIDGE_ATTACH_NO_CONNECTOR); if (ret < 0) return ret; if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) return 0; if (!bridge->encoder) { dev_err(dvi->dev, "Missing encoder\n"); return -ENODEV; } if (dvi->next_bridge->ops & DRM_BRIDGE_OP_DETECT) dvi->connector.polled = DRM_CONNECTOR_POLL_HPD; else dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; if (dvi->next_bridge->ops & DRM_BRIDGE_OP_HPD) { INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func); drm_bridge_hpd_enable(dvi->next_bridge, tfp410_hpd_callback, dvi); } drm_connector_helper_add(&dvi->connector, &tfp410_con_helper_funcs); ret = drm_connector_init_with_ddc(bridge->dev, &dvi->connector, &tfp410_con_funcs, dvi->next_bridge->type, dvi->next_bridge->ddc); if (ret) { dev_err(dvi->dev, "drm_connector_init_with_ddc() failed: %d\n", ret); return ret; } drm_display_info_set_bus_formats(&dvi->connector.display_info, &dvi->bus_format, 1); drm_connector_attach_encoder(&dvi->connector, bridge->encoder); return 0; } static void tfp410_detach(struct drm_bridge *bridge) { struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); if (dvi->connector.dev && dvi->next_bridge->ops & DRM_BRIDGE_OP_HPD) { drm_bridge_hpd_disable(dvi->next_bridge); cancel_delayed_work_sync(&dvi->hpd_work); } } static void tfp410_enable(struct drm_bridge *bridge) { struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); gpiod_set_value_cansleep(dvi->powerdown, 0); } static void tfp410_disable(struct drm_bridge *bridge) { struct tfp410 *dvi = drm_bridge_to_tfp410(bridge); gpiod_set_value_cansleep(dvi->powerdown, 1); } static enum drm_mode_status tfp410_mode_valid(struct drm_bridge *bridge, const struct drm_display_info *info, const struct drm_display_mode *mode) { if (mode->clock < 25000) return MODE_CLOCK_LOW; if (mode->clock > 165000) return MODE_CLOCK_HIGH; return MODE_OK; } static const struct drm_bridge_funcs tfp410_bridge_funcs = { .attach = tfp410_attach, .detach = tfp410_detach, .enable = tfp410_enable, .disable = tfp410_disable, .mode_valid = tfp410_mode_valid, }; static const struct drm_bridge_timings tfp410_default_timings = { .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE | DRM_BUS_FLAG_DE_HIGH, .setup_time_ps = 1200, .hold_time_ps = 1300, }; static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) { struct drm_bridge_timings *timings = &dvi->timings; struct device_node *ep; u32 pclk_sample = 0; u32 bus_width = 24; u32 deskew = 0; /* Start with defaults. */ *timings = tfp410_default_timings; if (i2c) /* * In I2C mode timings are configured through the I2C interface. * As the driver doesn't support I2C configuration yet, we just * go with the defaults (BSEL=1, DSEL=1, DKEN=0, EDGE=1). */ return 0; /* * In non-I2C mode, timings are configured through the BSEL, DSEL, DKEN * and EDGE pins. They are specified in DT through endpoint properties * and vendor-specific properties. */ ep = of_graph_get_endpoint_by_regs(dvi->dev->of_node, 0, 0); if (!ep) return -EINVAL; /* Get the sampling edge from the endpoint. */ of_property_read_u32(ep, "pclk-sample", &pclk_sample); of_property_read_u32(ep, "bus-width", &bus_width); of_node_put(ep); timings->input_bus_flags = DRM_BUS_FLAG_DE_HIGH; switch (pclk_sample) { case 0: timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE; break; case 1: timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE | DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE; break; default: return -EINVAL; } switch (bus_width) { case 12: dvi->bus_format = MEDIA_BUS_FMT_RGB888_2X12_LE; break; case 24: dvi->bus_format = MEDIA_BUS_FMT_RGB888_1X24; break; default: return -EINVAL; } /* Get the setup and hold time from vendor-specific properties. */ of_property_read_u32(dvi->dev->of_node, "ti,deskew", &deskew); if (deskew > 7) return -EINVAL; timings->setup_time_ps = 1200 - 350 * ((s32)deskew - 4); timings->hold_time_ps = max(0, 1300 + 350 * ((s32)deskew - 4)); return 0; } static int tfp410_init(struct device *dev, bool i2c) { struct device_node *node; struct tfp410 *dvi; int ret; if (!dev->of_node) { dev_err(dev, "device-tree data is missing\n"); return -ENXIO; } dvi = devm_kzalloc(dev, sizeof(*dvi), GFP_KERNEL); if (!dvi) return -ENOMEM; dvi->dev = dev; dev_set_drvdata(dev, dvi); dvi->bridge.funcs = &tfp410_bridge_funcs; dvi->bridge.of_node = dev->of_node; dvi->bridge.timings = &dvi->timings; dvi->bridge.type = DRM_MODE_CONNECTOR_DVID; ret = tfp410_parse_timings(dvi, i2c); if (ret) return ret; /* Get the next bridge, connected to port@1. */ node = of_graph_get_remote_node(dev->of_node, 1, -1); if (!node) return -ENODEV; dvi->next_bridge = of_drm_find_bridge(node); of_node_put(node); if (!dvi->next_bridge) return -EPROBE_DEFER; /* Get the powerdown GPIO. */ dvi->powerdown = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH); if (IS_ERR(dvi->powerdown)) { dev_err(dev, "failed to parse powerdown gpio\n"); return PTR_ERR(dvi->powerdown); } /* Register the DRM bridge. */ drm_bridge_add(&dvi->bridge); return 0; } static void tfp410_fini(struct device *dev) { struct tfp410 *dvi = dev_get_drvdata(dev); drm_bridge_remove(&dvi->bridge); } static int tfp410_probe(struct platform_device *pdev) { return tfp410_init(&pdev->dev, false); } static int tfp410_remove(struct platform_device *pdev) { tfp410_fini(&pdev->dev); return 0; } static const struct of_device_id tfp410_match[] = { { .compatible = "ti,tfp410" }, {}, }; MODULE_DEVICE_TABLE(of, tfp410_match); static struct platform_driver tfp410_platform_driver = { .probe = tfp410_probe, .remove = tfp410_remove, .driver = { .name = "tfp410-bridge", .of_match_table = tfp410_match, }, }; #if IS_ENABLED(CONFIG_I2C) /* There is currently no i2c functionality. */ static int tfp410_i2c_probe(struct i2c_client *client) { int reg; if (!client->dev.of_node || of_property_read_u32(client->dev.of_node, "reg", ®)) { dev_err(&client->dev, "Can't get i2c reg property from device-tree\n"); return -ENXIO; } return tfp410_init(&client->dev, true); } static void tfp410_i2c_remove(struct i2c_client *client) { tfp410_fini(&client->dev); } static const struct i2c_device_id tfp410_i2c_ids[] = { { "tfp410", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, tfp410_i2c_ids); static struct i2c_driver tfp410_i2c_driver = { .driver = { .name = "tfp410", .of_match_table = of_match_ptr(tfp410_match), }, .id_table = tfp410_i2c_ids, .probe_new = tfp410_i2c_probe, .remove = tfp410_i2c_remove, }; #endif /* IS_ENABLED(CONFIG_I2C) */ static struct { uint i2c:1; uint platform:1; } tfp410_registered_driver; static int __init tfp410_module_init(void) { int ret; #if IS_ENABLED(CONFIG_I2C) ret = i2c_add_driver(&tfp410_i2c_driver); if (ret) pr_err("%s: registering i2c driver failed: %d", __func__, ret); else tfp410_registered_driver.i2c = 1; #endif ret = platform_driver_register(&tfp410_platform_driver); if (ret) pr_err("%s: registering platform driver failed: %d", __func__, ret); else tfp410_registered_driver.platform = 1; if (tfp410_registered_driver.i2c || tfp410_registered_driver.platform) return 0; return ret; } module_init(tfp410_module_init); static void __exit tfp410_module_exit(void) { #if IS_ENABLED(CONFIG_I2C) if (tfp410_registered_driver.i2c) i2c_del_driver(&tfp410_i2c_driver); #endif if (tfp410_registered_driver.platform) platform_driver_unregister(&tfp410_platform_driver); } module_exit(tfp410_module_exit); MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>"); MODULE_DESCRIPTION("TI TFP410 DVI bridge driver"); MODULE_LICENSE("GPL");
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