[deliverable/linux.git] / drivers / gpu / drm / tilcdc / tilcdc_tfp410.c

/*
 * Copyright (C) 2012 Texas Instruments
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/consumer.h>

#include "tilcdc_drv.h"

struct tfp410_module {
	struct tilcdc_module base;
	struct i2c_adapter *i2c;
	int gpio;
};
#define to_tfp410_module(x) container_of(x, struct tfp410_module, base)


static const struct tilcdc_panel_info dvi_info = {
		.ac_bias                = 255,
		.ac_bias_intrpt         = 0,
		.dma_burst_sz           = 16,
		.bpp                    = 16,
		.fdd                    = 0x80,
		.tft_alt_mode           = 0,
		.sync_edge              = 0,
		.sync_ctrl              = 1,
		.raster_order           = 0,
};

/*
 * Encoder:
 */

struct tfp410_encoder {
	struct drm_encoder base;
	struct tfp410_module *mod;
	int dpms;
};
#define to_tfp410_encoder(x) container_of(x, struct tfp410_encoder, base)


static void tfp410_encoder_destroy(struct drm_encoder *encoder)
{
	struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);
	drm_encoder_cleanup(encoder);
	kfree(tfp410_encoder);
}

static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode)
{
	struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);

	if (tfp410_encoder->dpms == mode)
		return;

	if (mode == DRM_MODE_DPMS_ON) {
		DBG("Power on");
		gpio_direction_output(tfp410_encoder->mod->gpio, 1);
	} else {
		DBG("Power off");
		gpio_direction_output(tfp410_encoder->mod->gpio, 0);
	}

	tfp410_encoder->dpms = mode;
}

static bool tfp410_encoder_mode_fixup(struct drm_encoder *encoder,
		const struct drm_display_mode *mode,
		struct drm_display_mode *adjusted_mode)
{
	/* nothing needed */
	return true;
}

static void tfp410_encoder_prepare(struct drm_encoder *encoder)
{
	tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
	tilcdc_crtc_set_panel_info(encoder->crtc, &dvi_info);
}

static void tfp410_encoder_commit(struct drm_encoder *encoder)
{
	tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
}

static void tfp410_encoder_mode_set(struct drm_encoder *encoder,
		struct drm_display_mode *mode,
		struct drm_display_mode *adjusted_mode)
{
	/* nothing needed */
}

static const struct drm_encoder_funcs tfp410_encoder_funcs = {
		.destroy        = tfp410_encoder_destroy,
};

static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = {
		.dpms           = tfp410_encoder_dpms,
		.mode_fixup     = tfp410_encoder_mode_fixup,
		.prepare        = tfp410_encoder_prepare,
		.commit         = tfp410_encoder_commit,
		.mode_set       = tfp410_encoder_mode_set,
};

static struct drm_encoder *tfp410_encoder_create(struct drm_device *dev,
		struct tfp410_module *mod)
{
	struct tfp410_encoder *tfp410_encoder;
	struct drm_encoder *encoder;
	int ret;

	tfp410_encoder = kzalloc(sizeof(*tfp410_encoder), GFP_KERNEL);
	if (!tfp410_encoder) {
		dev_err(dev->dev, "allocation failed\n");
		return NULL;
	}

	tfp410_encoder->dpms = DRM_MODE_DPMS_OFF;
	tfp410_encoder->mod = mod;

	encoder = &tfp410_encoder->base;
	encoder->possible_crtcs = 1;

	ret = drm_encoder_init(dev, encoder, &tfp410_encoder_funcs,
			DRM_MODE_ENCODER_TMDS);
	if (ret < 0)
		goto fail;

	drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs);

	return encoder;

fail:
	tfp410_encoder_destroy(encoder);
	return NULL;
}

/*
 * Connector:
 */

struct tfp410_connector {
	struct drm_connector base;

	struct drm_encoder *encoder;  /* our connected encoder */
	struct tfp410_module *mod;
};
#define to_tfp410_connector(x) container_of(x, struct tfp410_connector, base)


static void tfp410_connector_destroy(struct drm_connector *connector)
{
	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
	drm_connector_cleanup(connector);
	kfree(tfp410_connector);
}

static enum drm_connector_status tfp410_connector_detect(
		struct drm_connector *connector,
		bool force)
{
	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);

	if (drm_probe_ddc(tfp410_connector->mod->i2c))
		return connector_status_connected;

	return connector_status_unknown;
}

static int tfp410_connector_get_modes(struct drm_connector *connector)
{
	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
	struct edid *edid;
	int ret = 0;

	edid = drm_get_edid(connector, tfp410_connector->mod->i2c);

	drm_mode_connector_update_edid_property(connector, edid);

	if (edid) {
		ret = drm_add_edid_modes(connector, edid);
		kfree(edid);
	}

	return ret;
}

static int tfp410_connector_mode_valid(struct drm_connector *connector,
		  struct drm_display_mode *mode)
{
	struct tilcdc_drm_private *priv = connector->dev->dev_private;
	/* our only constraints are what the crtc can generate: */
	return tilcdc_crtc_mode_valid(priv->crtc, mode);
}

static struct drm_encoder *tfp410_connector_best_encoder(
		struct drm_connector *connector)
{
	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
	return tfp410_connector->encoder;
}

static const struct drm_connector_funcs tfp410_connector_funcs = {
	.destroy            = tfp410_connector_destroy,
	.dpms               = drm_helper_connector_dpms,
	.detect             = tfp410_connector_detect,
	.fill_modes         = drm_helper_probe_single_connector_modes,
};

static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = {
	.get_modes          = tfp410_connector_get_modes,
	.mode_valid         = tfp410_connector_mode_valid,
	.best_encoder       = tfp410_connector_best_encoder,
};

static struct drm_connector *tfp410_connector_create(struct drm_device *dev,
		struct tfp410_module *mod, struct drm_encoder *encoder)
{
	struct tfp410_connector *tfp410_connector;
	struct drm_connector *connector;
	int ret;

	tfp410_connector = kzalloc(sizeof(*tfp410_connector), GFP_KERNEL);
	if (!tfp410_connector) {
		dev_err(dev->dev, "allocation failed\n");
		return NULL;
	}

	tfp410_connector->encoder = encoder;
	tfp410_connector->mod = mod;

	connector = &tfp410_connector->base;

	drm_connector_init(dev, connector, &tfp410_connector_funcs,
			DRM_MODE_CONNECTOR_DVID);
	drm_connector_helper_add(connector, &tfp410_connector_helper_funcs);

	connector->polled = DRM_CONNECTOR_POLL_CONNECT |
			DRM_CONNECTOR_POLL_DISCONNECT;

	connector->interlace_allowed = 0;
	connector->doublescan_allowed = 0;

	ret = drm_mode_connector_attach_encoder(connector, encoder);
	if (ret)
		goto fail;

	drm_connector_register(connector);

	return connector;

fail:
	tfp410_connector_destroy(connector);
	return NULL;
}

/*
 * Module:
 */

static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
{
	struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
	struct tilcdc_drm_private *priv = dev->dev_private;
	struct drm_encoder *encoder;
	struct drm_connector *connector;

	encoder = tfp410_encoder_create(dev, tfp410_mod);
	if (!encoder)
		return -ENOMEM;

	connector = tfp410_connector_create(dev, tfp410_mod, encoder);
	if (!connector)
		return -ENOMEM;

	priv->encoders[priv->num_encoders++] = encoder;
	priv->connectors[priv->num_connectors++] = connector;

	return 0;
}

static void tfp410_destroy(struct tilcdc_module *mod)
{
	struct tfp410_module *tfp410_mod = to_tfp410_module(mod);

	if (tfp410_mod->i2c)
		i2c_put_adapter(tfp410_mod->i2c);

	if (!IS_ERR_VALUE(tfp410_mod->gpio))
		gpio_free(tfp410_mod->gpio);

	tilcdc_module_cleanup(mod);
	kfree(tfp410_mod);
}

static const struct tilcdc_module_ops tfp410_module_ops = {
		.modeset_init = tfp410_modeset_init,
		.destroy = tfp410_destroy,
};

/*
 * Device:
 */

static struct of_device_id tfp410_of_match[];

static int tfp410_probe(struct platform_device *pdev)
{
	struct device_node *node = pdev->dev.of_node;
	struct device_node *i2c_node;
	struct tfp410_module *tfp410_mod;
	struct tilcdc_module *mod;
	struct pinctrl *pinctrl;
	uint32_t i2c_phandle;
	int ret = -EINVAL;

	/* bail out early if no DT data: */
	if (!node) {
		dev_err(&pdev->dev, "device-tree data is missing\n");
		return -ENXIO;
	}

	tfp410_mod = kzalloc(sizeof(*tfp410_mod), GFP_KERNEL);
	if (!tfp410_mod)
		return -ENOMEM;

	mod = &tfp410_mod->base;

	tilcdc_module_init(mod, "tfp410", &tfp410_module_ops);

	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
	if (IS_ERR(pinctrl))
		dev_warn(&pdev->dev, "pins are not configured\n");

	if (of_property_read_u32(node, "i2c", &i2c_phandle)) {
		dev_err(&pdev->dev, "could not get i2c bus phandle\n");
		goto fail;
	}

	mod->preferred_bpp = dvi_info.bpp;

	i2c_node = of_find_node_by_phandle(i2c_phandle);
	if (!i2c_node) {
		dev_err(&pdev->dev, "could not get i2c bus node\n");
		goto fail;
	}

	tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node);
	if (!tfp410_mod->i2c) {
		dev_err(&pdev->dev, "could not get i2c\n");
		goto fail;
	}

	of_node_put(i2c_node);

	tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio",
			0, NULL);
	if (IS_ERR_VALUE(tfp410_mod->gpio)) {
		dev_warn(&pdev->dev, "No power down GPIO\n");
	} else {
		ret = gpio_request(tfp410_mod->gpio, "DVI_PDn");
		if (ret) {
			dev_err(&pdev->dev, "could not get DVI_PDn gpio\n");
			goto fail;
		}
	}

	return 0;

fail:
	tfp410_destroy(mod);
	return ret;
}

static int tfp410_remove(struct platform_device *pdev)
{
	return 0;
}

static struct of_device_id tfp410_of_match[] = {
		{ .compatible = "ti,tilcdc,tfp410", },
		{ },
};

struct platform_driver tfp410_driver = {
	.probe = tfp410_probe,
	.remove = tfp410_remove,
	.driver = {
		.owner = THIS_MODULE,
		.name = "tfp410",
		.of_match_table = tfp410_of_match,
	},
};

int __init tilcdc_tfp410_init(void)
{
	return platform_driver_register(&tfp410_driver);
}

void __exit tilcdc_tfp410_fini(void)
{
	platform_driver_unregister(&tfp410_driver);
}
Commit	Line	Data
16ea975e RC	1	/*
	2	* Copyright (C) 2012 Texas Instruments
	3	* Author: Rob Clark <robdclark@gmail.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published by
	7	* the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program. If not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#include <linux/i2c.h>
16ea975e RC	19	#include <linux/gpio.h>
	20	#include <linux/of_gpio.h>
	21	#include <linux/pinctrl/pinmux.h>
	22	#include <linux/pinctrl/consumer.h>
	23
	24	#include "tilcdc_drv.h"
	25
	26	struct tfp410_module {
	27	struct tilcdc_module base;
	28	struct i2c_adapter *i2c;
	29	int gpio;
	30	};
	31	#define to_tfp410_module(x) container_of(x, struct tfp410_module, base)
	32
	33
	34	static const struct tilcdc_panel_info dvi_info = {
	35	.ac_bias = 255,
	36	.ac_bias_intrpt = 0,
	37	.dma_burst_sz = 16,
	38	.bpp = 16,
	39	.fdd = 0x80,
	40	.tft_alt_mode = 0,
	41	.sync_edge = 0,
	42	.sync_ctrl = 1,
	43	.raster_order = 0,
	44	};
	45
	46	/*
	47	* Encoder:
	48	*/
	49
	50	struct tfp410_encoder {
	51	struct drm_encoder base;
	52	struct tfp410_module *mod;
	53	int dpms;
	54	};
	55	#define to_tfp410_encoder(x) container_of(x, struct tfp410_encoder, base)
	56
	57
	58	static void tfp410_encoder_destroy(struct drm_encoder *encoder)
	59	{
	60	struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);
	61	drm_encoder_cleanup(encoder);
	62	kfree(tfp410_encoder);
	63	}
	64
	65	static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode)
	66	{
	67	struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);
	68
	69	if (tfp410_encoder->dpms == mode)
	70	return;
	71
	72	if (mode == DRM_MODE_DPMS_ON) {
	73	DBG("Power on");
	74	gpio_direction_output(tfp410_encoder->mod->gpio, 1);
	75	} else {
	76	DBG("Power off");
	77	gpio_direction_output(tfp410_encoder->mod->gpio, 0);
	78	}
	79
	80	tfp410_encoder->dpms = mode;
	81	}
	82
83	static bool tfp410_encoder_mode_fixup(struct drm_encoder *encoder,
84	const struct drm_display_mode *mode,
85	struct drm_display_mode *adjusted_mode)
86	{
87	/* nothing needed */
88	return true;
89	}
90
91	static void tfp410_encoder_prepare(struct drm_encoder *encoder)
92	{
93	tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
94	tilcdc_crtc_set_panel_info(encoder->crtc, &dvi_info);
95	}
96
97	static void tfp410_encoder_commit(struct drm_encoder *encoder)
98	{
99	tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
100	}
101
102	static void tfp410_encoder_mode_set(struct drm_encoder *encoder,
103	struct drm_display_mode *mode,
104	struct drm_display_mode *adjusted_mode)
105	{
106	/* nothing needed */
107	}
108
109	static const struct drm_encoder_funcs tfp410_encoder_funcs = {
110	.destroy = tfp410_encoder_destroy,
111	};
112
113	static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = {
114	.dpms = tfp410_encoder_dpms,
115	.mode_fixup = tfp410_encoder_mode_fixup,
116	.prepare = tfp410_encoder_prepare,
117	.commit = tfp410_encoder_commit,
118	.mode_set = tfp410_encoder_mode_set,
119	};
120
121	static struct drm_encoder tfp410_encoder_create(struct drm_device dev,
122	struct tfp410_module *mod)
123	{
124	struct tfp410_encoder *tfp410_encoder;
125	struct drm_encoder *encoder;
126	int ret;
127
128	tfp410_encoder = kzalloc(sizeof(*tfp410_encoder), GFP_KERNEL);
129	if (!tfp410_encoder) {
130	dev_err(dev->dev, "allocation failed\n");
131	return NULL;
132	}
133
134	tfp410_encoder->dpms = DRM_MODE_DPMS_OFF;
135	tfp410_encoder->mod = mod;
136
137	encoder = &tfp410_encoder->base;
138	encoder->possible_crtcs = 1;
139
140	ret = drm_encoder_init(dev, encoder, &tfp410_encoder_funcs,
141	DRM_MODE_ENCODER_TMDS);
142	if (ret < 0)
143	goto fail;
144
145	drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs);
146
147	return encoder;
148
149	fail:
150	tfp410_encoder_destroy(encoder);
151	return NULL;
152	}
153
154	/*
155	* Connector:
156	*/
157
158	struct tfp410_connector {
159	struct drm_connector base;
160
161	struct drm_encoder encoder; / our connected encoder */
162	struct tfp410_module *mod;
163	};
164	#define to_tfp410_connector(x) container_of(x, struct tfp410_connector, base)
165
166
167	static void tfp410_connector_destroy(struct drm_connector *connector)
168	{
169	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
170	drm_connector_cleanup(connector);
171	kfree(tfp410_connector);
172	}
173
174	static enum drm_connector_status tfp410_connector_detect(
175	struct drm_connector *connector,
176	bool force)
177	{
178	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
179
180	if (drm_probe_ddc(tfp410_connector->mod->i2c))
181	return connector_status_connected;
182
183	return connector_status_unknown;
184	}
185
186	static int tfp410_connector_get_modes(struct drm_connector *connector)
187	{
188	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
189	struct edid *edid;
190	int ret = 0;
191
192	edid = drm_get_edid(connector, tfp410_connector->mod->i2c);
193
194	drm_mode_connector_update_edid_property(connector, edid);
195
196	if (edid) {
197	ret = drm_add_edid_modes(connector, edid);
198	kfree(edid);
199	}
200
201	return ret;
202	}
203
204	static int tfp410_connector_mode_valid(struct drm_connector *connector,
205	struct drm_display_mode *mode)
206	{
207	struct tilcdc_drm_private *priv = connector->dev->dev_private;
208	/* our only constraints are what the crtc can generate: */
209	return tilcdc_crtc_mode_valid(priv->crtc, mode);
210	}
211
212	static struct drm_encoder *tfp410_connector_best_encoder(
213	struct drm_connector *connector)
214	{
215	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
216	return tfp410_connector->encoder;
217	}
218
219	static const struct drm_connector_funcs tfp410_connector_funcs = {
220	.destroy = tfp410_connector_destroy,
221	.dpms = drm_helper_connector_dpms,
222	.detect = tfp410_connector_detect,
223	.fill_modes = drm_helper_probe_single_connector_modes,
224	};
225
226	static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = {
227	.get_modes = tfp410_connector_get_modes,
228	.mode_valid = tfp410_connector_mode_valid,
229	.best_encoder = tfp410_connector_best_encoder,
230	};
231
232	static struct drm_connector tfp410_connector_create(struct drm_device dev,
233	struct tfp410_module mod, struct drm_encoder encoder)
234	{
235	struct tfp410_connector *tfp410_connector;
236	struct drm_connector *connector;
237	int ret;
238
239	tfp410_connector = kzalloc(sizeof(*tfp410_connector), GFP_KERNEL);
240	if (!tfp410_connector) {
241	dev_err(dev->dev, "allocation failed\n");
242	return NULL;
243	}
244
245	tfp410_connector->encoder = encoder;
246	tfp410_connector->mod = mod;
247
248	connector = &tfp410_connector->base;
249
250	drm_connector_init(dev, connector, &tfp410_connector_funcs,
251	DRM_MODE_CONNECTOR_DVID);
252	drm_connector_helper_add(connector, &tfp410_connector_helper_funcs);
253
254	connector->polled = DRM_CONNECTOR_POLL_CONNECT \|
255	DRM_CONNECTOR_POLL_DISCONNECT;
256
257	connector->interlace_allowed = 0;
258	connector->doublescan_allowed = 0;
259
260	ret = drm_mode_connector_attach_encoder(connector, encoder);
261	if (ret)
262	goto fail;
263
34ea3d38	264	drm_connector_register(connector);
16ea975e RC	265
	266	return connector;
	267
	268	fail:
	269	tfp410_connector_destroy(connector);
	270	return NULL;
	271	}
	272
	273	/*
	274	* Module:
	275	*/
	276
	277	static int tfp410_modeset_init(struct tilcdc_module mod, struct drm_device dev)
	278	{
	279	struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
	280	struct tilcdc_drm_private *priv = dev->dev_private;
	281	struct drm_encoder *encoder;
	282	struct drm_connector *connector;
	283
	284	encoder = tfp410_encoder_create(dev, tfp410_mod);
	285	if (!encoder)
	286	return -ENOMEM;
	287
	288	connector = tfp410_connector_create(dev, tfp410_mod, encoder);
	289	if (!connector)
	290	return -ENOMEM;
	291
	292	priv->encoders[priv->num_encoders++] = encoder;
	293	priv->connectors[priv->num_connectors++] = connector;
	294
	295	return 0;
	296	}
	297
	298	static void tfp410_destroy(struct tilcdc_module *mod)
	299	{
	300	struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
	301
	302	if (tfp410_mod->i2c)
	303	i2c_put_adapter(tfp410_mod->i2c);
	304
	305	if (!IS_ERR_VALUE(tfp410_mod->gpio))
	306	gpio_free(tfp410_mod->gpio);
	307
	308	tilcdc_module_cleanup(mod);
	309	kfree(tfp410_mod);
	310	}
	311
	312	static const struct tilcdc_module_ops tfp410_module_ops = {
	313	.modeset_init = tfp410_modeset_init,
	314	.destroy = tfp410_destroy,
	315	};
	316
	317	/*
	318	* Device:
	319	*/
	320
	321	static struct of_device_id tfp410_of_match[];
	322
	323	static int tfp410_probe(struct platform_device *pdev)
	324	{
	325	struct device_node *node = pdev->dev.of_node;
	326	struct device_node *i2c_node;
	327	struct tfp410_module *tfp410_mod;
	328	struct tilcdc_module *mod;
329	struct pinctrl *pinctrl;
330	uint32_t i2c_phandle;
331	int ret = -EINVAL;
332
333	/* bail out early if no DT data: */
334	if (!node) {
335	dev_err(&pdev->dev, "device-tree data is missing\n");
336	return -ENXIO;
337	}
338
339	tfp410_mod = kzalloc(sizeof(*tfp410_mod), GFP_KERNEL);
340	if (!tfp410_mod)
341	return -ENOMEM;
342
343	mod = &tfp410_mod->base;
344
345	tilcdc_module_init(mod, "tfp410", &tfp410_module_ops);
346
347	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
348	if (IS_ERR(pinctrl))
349	dev_warn(&pdev->dev, "pins are not configured\n");
350
351	if (of_property_read_u32(node, "i2c", &i2c_phandle)) {
352	dev_err(&pdev->dev, "could not get i2c bus phandle\n");
353	goto fail;
354	}
355
dc28aa07 BP	356	mod->preferred_bpp = dvi_info.bpp;
dc28aa07 BP	357
16ea975e RC	358	i2c_node = of_find_node_by_phandle(i2c_phandle);
	359	if (!i2c_node) {
	360	dev_err(&pdev->dev, "could not get i2c bus node\n");
	361	goto fail;
	362	}
	363
	364	tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node);
	365	if (!tfp410_mod->i2c) {
	366	dev_err(&pdev->dev, "could not get i2c\n");
	367	goto fail;
	368	}
	369
	370	of_node_put(i2c_node);
	371
	372	tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio",
	373	0, NULL);
	374	if (IS_ERR_VALUE(tfp410_mod->gpio)) {
	375	dev_warn(&pdev->dev, "No power down GPIO\n");
	376	} else {
	377	ret = gpio_request(tfp410_mod->gpio, "DVI_PDn");
	378	if (ret) {
	379	dev_err(&pdev->dev, "could not get DVI_PDn gpio\n");
	380	goto fail;
	381	}
	382	}
	383
	384	return 0;
	385
	386	fail:
	387	tfp410_destroy(mod);
	388	return ret;
	389	}
	390
	391	static int tfp410_remove(struct platform_device *pdev)
	392	{
	393	return 0;
	394	}
	395
	396	static struct of_device_id tfp410_of_match[] = {
	397	{ .compatible = "ti,tilcdc,tfp410", },
	398	{ },
	399	};
16ea975e RC	400
	401	struct platform_driver tfp410_driver = {
	402	.probe = tfp410_probe,
	403	.remove = tfp410_remove,
	404	.driver = {
	405	.owner = THIS_MODULE,
	406	.name = "tfp410",
	407	.of_match_table = tfp410_of_match,
	408	},
	409	};
	410
	411	int __init tilcdc_tfp410_init(void)
	412	{
	413	return platform_driver_register(&tfp410_driver);
	414	}
	415
	416	void __exit tilcdc_tfp410_fini(void)
	417	{
	418	platform_driver_unregister(&tfp410_driver);
	419	}