1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2012 Texas Instruments
4 * Author: Rob Clark <robdclark@gmail.com>
8 #include <linux/gpio.h>
9 #include <linux/of_gpio.h>
10 #include <linux/pinctrl/pinmux.h>
11 #include <linux/pinctrl/consumer.h>
12 #include <drm/drm_atomic_helper.h>
13 #include <drm/drm_probe_helper.h>
15 #include "tilcdc_drv.h"
16 #include "tilcdc_tfp410.h"
18 struct tfp410_module {
19 struct tilcdc_module base;
20 struct i2c_adapter *i2c;
23 #define to_tfp410_module(x) container_of(x, struct tfp410_module, base)
26 static const struct tilcdc_panel_info dvi_info = {
42 struct tfp410_encoder {
43 struct drm_encoder base;
44 struct tfp410_module *mod;
47 #define to_tfp410_encoder(x) container_of(x, struct tfp410_encoder, base)
49 static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode)
51 struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);
53 if (tfp410_encoder->dpms == mode)
56 if (mode == DRM_MODE_DPMS_ON) {
58 gpio_direction_output(tfp410_encoder->mod->gpio, 1);
61 gpio_direction_output(tfp410_encoder->mod->gpio, 0);
64 tfp410_encoder->dpms = mode;
67 static void tfp410_encoder_prepare(struct drm_encoder *encoder)
69 tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
72 static void tfp410_encoder_commit(struct drm_encoder *encoder)
74 tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
77 static void tfp410_encoder_mode_set(struct drm_encoder *encoder,
78 struct drm_display_mode *mode,
79 struct drm_display_mode *adjusted_mode)
84 static const struct drm_encoder_funcs tfp410_encoder_funcs = {
85 .destroy = drm_encoder_cleanup,
88 static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = {
89 .dpms = tfp410_encoder_dpms,
90 .prepare = tfp410_encoder_prepare,
91 .commit = tfp410_encoder_commit,
92 .mode_set = tfp410_encoder_mode_set,
95 static struct drm_encoder *tfp410_encoder_create(struct drm_device *dev,
96 struct tfp410_module *mod)
98 struct tfp410_encoder *tfp410_encoder;
99 struct drm_encoder *encoder;
102 tfp410_encoder = devm_kzalloc(dev->dev, sizeof(*tfp410_encoder),
107 tfp410_encoder->dpms = DRM_MODE_DPMS_OFF;
108 tfp410_encoder->mod = mod;
110 encoder = &tfp410_encoder->base;
111 encoder->possible_crtcs = 1;
113 ret = drm_encoder_init(dev, encoder, &tfp410_encoder_funcs,
114 DRM_MODE_ENCODER_TMDS, NULL);
118 drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs);
123 drm_encoder_cleanup(encoder);
131 struct tfp410_connector {
132 struct drm_connector base;
134 struct drm_encoder *encoder; /* our connected encoder */
135 struct tfp410_module *mod;
137 #define to_tfp410_connector(x) container_of(x, struct tfp410_connector, base)
140 static void tfp410_connector_destroy(struct drm_connector *connector)
142 drm_connector_unregister(connector);
143 drm_connector_cleanup(connector);
146 static enum drm_connector_status tfp410_connector_detect(
147 struct drm_connector *connector,
150 struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
152 if (drm_probe_ddc(tfp410_connector->mod->i2c))
153 return connector_status_connected;
155 return connector_status_unknown;
158 static int tfp410_connector_get_modes(struct drm_connector *connector)
160 struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
164 edid = drm_get_edid(connector, tfp410_connector->mod->i2c);
166 drm_connector_update_edid_property(connector, edid);
169 ret = drm_add_edid_modes(connector, edid);
176 static int tfp410_connector_mode_valid(struct drm_connector *connector,
177 struct drm_display_mode *mode)
179 struct tilcdc_drm_private *priv = connector->dev->dev_private;
180 /* our only constraints are what the crtc can generate: */
181 return tilcdc_crtc_mode_valid(priv->crtc, mode);
184 static struct drm_encoder *tfp410_connector_best_encoder(
185 struct drm_connector *connector)
187 struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
188 return tfp410_connector->encoder;
191 static const struct drm_connector_funcs tfp410_connector_funcs = {
192 .destroy = tfp410_connector_destroy,
193 .detect = tfp410_connector_detect,
194 .fill_modes = drm_helper_probe_single_connector_modes,
195 .reset = drm_atomic_helper_connector_reset,
196 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
197 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
200 static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = {
201 .get_modes = tfp410_connector_get_modes,
202 .mode_valid = tfp410_connector_mode_valid,
203 .best_encoder = tfp410_connector_best_encoder,
206 static struct drm_connector *tfp410_connector_create(struct drm_device *dev,
207 struct tfp410_module *mod, struct drm_encoder *encoder)
209 struct tfp410_connector *tfp410_connector;
210 struct drm_connector *connector;
213 tfp410_connector = devm_kzalloc(dev->dev, sizeof(*tfp410_connector),
215 if (!tfp410_connector)
218 tfp410_connector->encoder = encoder;
219 tfp410_connector->mod = mod;
221 connector = &tfp410_connector->base;
223 drm_connector_init(dev, connector, &tfp410_connector_funcs,
224 DRM_MODE_CONNECTOR_DVID);
225 drm_connector_helper_add(connector, &tfp410_connector_helper_funcs);
227 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
228 DRM_CONNECTOR_POLL_DISCONNECT;
230 connector->interlace_allowed = 0;
231 connector->doublescan_allowed = 0;
233 ret = drm_connector_attach_encoder(connector, encoder);
240 tfp410_connector_destroy(connector);
248 static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
250 struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
251 struct tilcdc_drm_private *priv = dev->dev_private;
252 struct drm_encoder *encoder;
253 struct drm_connector *connector;
255 encoder = tfp410_encoder_create(dev, tfp410_mod);
259 connector = tfp410_connector_create(dev, tfp410_mod, encoder);
263 priv->encoders[priv->num_encoders++] = encoder;
264 priv->connectors[priv->num_connectors++] = connector;
266 tilcdc_crtc_set_panel_info(priv->crtc, &dvi_info);
270 static const struct tilcdc_module_ops tfp410_module_ops = {
271 .modeset_init = tfp410_modeset_init,
278 static int tfp410_probe(struct platform_device *pdev)
280 struct device_node *node = pdev->dev.of_node;
281 struct device_node *i2c_node;
282 struct tfp410_module *tfp410_mod;
283 struct tilcdc_module *mod;
284 struct pinctrl *pinctrl;
285 uint32_t i2c_phandle;
288 /* bail out early if no DT data: */
290 dev_err(&pdev->dev, "device-tree data is missing\n");
294 tfp410_mod = devm_kzalloc(&pdev->dev, sizeof(*tfp410_mod), GFP_KERNEL);
298 mod = &tfp410_mod->base;
299 pdev->dev.platform_data = mod;
301 tilcdc_module_init(mod, "tfp410", &tfp410_module_ops);
303 pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
305 dev_warn(&pdev->dev, "pins are not configured\n");
307 if (of_property_read_u32(node, "i2c", &i2c_phandle)) {
308 dev_err(&pdev->dev, "could not get i2c bus phandle\n");
312 i2c_node = of_find_node_by_phandle(i2c_phandle);
314 dev_err(&pdev->dev, "could not get i2c bus node\n");
318 tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node);
319 if (!tfp410_mod->i2c) {
320 dev_err(&pdev->dev, "could not get i2c\n");
321 of_node_put(i2c_node);
325 of_node_put(i2c_node);
327 tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio",
329 if (tfp410_mod->gpio < 0) {
330 dev_warn(&pdev->dev, "No power down GPIO\n");
332 ret = gpio_request(tfp410_mod->gpio, "DVI_PDn");
334 dev_err(&pdev->dev, "could not get DVI_PDn gpio\n");
342 i2c_put_adapter(tfp410_mod->i2c);
345 tilcdc_module_cleanup(mod);
349 static int tfp410_remove(struct platform_device *pdev)
351 struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
352 struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
354 i2c_put_adapter(tfp410_mod->i2c);
355 gpio_free(tfp410_mod->gpio);
357 tilcdc_module_cleanup(mod);
362 static const struct of_device_id tfp410_of_match[] = {
363 { .compatible = "ti,tilcdc,tfp410", },
367 struct platform_driver tfp410_driver = {
368 .probe = tfp410_probe,
369 .remove = tfp410_remove,
371 .owner = THIS_MODULE,
373 .of_match_table = tfp410_of_match,
377 int __init tilcdc_tfp410_init(void)
379 return platform_driver_register(&tfp410_driver);
382 void __exit tilcdc_tfp410_fini(void)
384 platform_driver_unregister(&tfp410_driver);