[deliverable/linux.git] / drivers / staging / imx-drm / parallel-display.c

/*
 * i.MX drm driver - parallel display implementation
 *
 * Copyright (C) 2012 Sascha Hauer, Pengutronix
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include <linux/component.h>
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_panel.h>
#include <linux/videodev2.h>
#include <video/of_display_timing.h>

#include "imx-drm.h"

#define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
#define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)

struct imx_parallel_display {
	struct drm_connector connector;
	struct drm_encoder encoder;
	struct device *dev;
	void *edid;
	int edid_len;
	u32 interface_pix_fmt;
	int mode_valid;
	struct drm_display_mode mode;
	struct drm_panel *panel;
};

static enum drm_connector_status imx_pd_connector_detect(
		struct drm_connector *connector, bool force)
{
	return connector_status_connected;
}

static int imx_pd_connector_get_modes(struct drm_connector *connector)
{
	struct imx_parallel_display *imxpd = con_to_imxpd(connector);
	struct device_node *np = imxpd->dev->of_node;
	int num_modes = 0;

	if (imxpd->panel && imxpd->panel->funcs &&
	    imxpd->panel->funcs->get_modes) {
		num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
		if (num_modes > 0)
			return num_modes;
	}

	if (imxpd->edid) {
		drm_mode_connector_update_edid_property(connector, imxpd->edid);
		num_modes = drm_add_edid_modes(connector, imxpd->edid);
	}

	if (imxpd->mode_valid) {
		struct drm_display_mode *mode = drm_mode_create(connector->dev);
		drm_mode_copy(mode, &imxpd->mode);
		mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
		drm_mode_probed_add(connector, mode);
		num_modes++;
	}

	if (np) {
		struct drm_display_mode *mode = drm_mode_create(connector->dev);
		of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
		drm_mode_copy(mode, &imxpd->mode);
		mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
		drm_mode_probed_add(connector, mode);
		num_modes++;
	}

	return num_modes;
}

static struct drm_encoder *imx_pd_connector_best_encoder(
		struct drm_connector *connector)
{
	struct imx_parallel_display *imxpd = con_to_imxpd(connector);

	return &imxpd->encoder;
}

static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
{
	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

	if (mode != DRM_MODE_DPMS_ON)
		drm_panel_disable(imxpd->panel);
	else
		drm_panel_enable(imxpd->panel);
}

static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
			   const struct drm_display_mode *mode,
			   struct drm_display_mode *adjusted_mode)
{
	return true;
}

static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
{
	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);

	imx_drm_panel_format(encoder, imxpd->interface_pix_fmt);
}

static void imx_pd_encoder_commit(struct drm_encoder *encoder)
{
}

static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
			 struct drm_display_mode *mode,
			 struct drm_display_mode *adjusted_mode)
{
}

static void imx_pd_encoder_disable(struct drm_encoder *encoder)
{
}

static struct drm_connector_funcs imx_pd_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.detect = imx_pd_connector_detect,
	.destroy = imx_drm_connector_destroy,
};

static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
	.get_modes = imx_pd_connector_get_modes,
	.best_encoder = imx_pd_connector_best_encoder,
	.mode_valid = imx_drm_connector_mode_valid,
};

static struct drm_encoder_funcs imx_pd_encoder_funcs = {
	.destroy = imx_drm_encoder_destroy,
};

static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
	.dpms = imx_pd_encoder_dpms,
	.mode_fixup = imx_pd_encoder_mode_fixup,
	.prepare = imx_pd_encoder_prepare,
	.commit = imx_pd_encoder_commit,
	.mode_set = imx_pd_encoder_mode_set,
	.disable = imx_pd_encoder_disable,
};

static int imx_pd_register(struct drm_device *drm,
	struct imx_parallel_display *imxpd)
{
	int ret;

	ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder,
				       imxpd->dev->of_node);
	if (ret)
		return ret;

	drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
	drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
			 DRM_MODE_ENCODER_NONE);

	drm_connector_helper_add(&imxpd->connector,
			&imx_pd_connector_helper_funcs);
	drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs,
			   DRM_MODE_CONNECTOR_VGA);

	if (imxpd->panel)
		drm_panel_attach(imxpd->panel, &imxpd->connector);

	drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);

	imxpd->connector.encoder = &imxpd->encoder;

	return 0;
}

static int imx_pd_bind(struct device *dev, struct device *master, void *data)
{
	struct drm_device *drm = data;
	struct device_node *np = dev->of_node;
	struct device_node *panel_node;
	const u8 *edidp;
	struct imx_parallel_display *imxpd;
	int ret;
	const char *fmt;

	imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
	if (!imxpd)
		return -ENOMEM;

	edidp = of_get_property(np, "edid", &imxpd->edid_len);
	if (edidp)
		imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);

	ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
	if (!ret) {
		if (!strcmp(fmt, "rgb24"))
			imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24;
		else if (!strcmp(fmt, "rgb565"))
			imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565;
		else if (!strcmp(fmt, "bgr666"))
			imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666;
	}

	panel_node = of_parse_phandle(np, "fsl,panel", 0);
	if (panel_node)
		imxpd->panel = of_drm_find_panel(panel_node);

	imxpd->dev = dev;

	ret = imx_pd_register(drm, imxpd);
	if (ret)
		return ret;

	dev_set_drvdata(dev, imxpd);

	return 0;
}

static void imx_pd_unbind(struct device *dev, struct device *master,
	void *data)
{
	struct imx_parallel_display *imxpd = dev_get_drvdata(dev);

	imxpd->encoder.funcs->destroy(&imxpd->encoder);
	imxpd->connector.funcs->destroy(&imxpd->connector);
}

static const struct component_ops imx_pd_ops = {
	.bind	= imx_pd_bind,
	.unbind	= imx_pd_unbind,
};

static int imx_pd_probe(struct platform_device *pdev)
{
	return component_add(&pdev->dev, &imx_pd_ops);
}

static int imx_pd_remove(struct platform_device *pdev)
{
	component_del(&pdev->dev, &imx_pd_ops);
	return 0;
}

static const struct of_device_id imx_pd_dt_ids[] = {
	{ .compatible = "fsl,imx-parallel-display", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);

static struct platform_driver imx_pd_driver = {
	.probe		= imx_pd_probe,
	.remove		= imx_pd_remove,
	.driver		= {
		.of_match_table = imx_pd_dt_ids,
		.name	= "imx-parallel-display",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(imx_pd_driver);

MODULE_DESCRIPTION("i.MX parallel display driver");
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:imx-parallel-display");
Commit	Line	Data
19022aaa SH	1	/*
	2	* i.MX drm driver - parallel display implementation
	3	*
	4	* Copyright (C) 2012 Sascha Hauer, Pengutronix
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version 2
	9	* of the License, or (at your option) any later version.
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
	18	* MA 02110-1301, USA.
	19	*/
	20
17b5001b	21	#include <linux/component.h>
19022aaa SH	22	#include <linux/module.h>
	23	#include <drm/drmP.h>
	24	#include <drm/drm_fb_helper.h>
	25	#include <drm/drm_crtc_helper.h>
628f435b	26	#include <drm/drm_panel.h>
19022aaa	27	#include <linux/videodev2.h>
075c457b	28	#include <video/of_display_timing.h>
19022aaa SH	29
	30	#include "imx-drm.h"
	31
	32	#define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
	33	#define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)
	34
	35	struct imx_parallel_display {
	36	struct drm_connector connector;
19022aaa	37	struct drm_encoder encoder;
19022aaa SH	38	struct device *dev;
	39	void *edid;
	40	int edid_len;
	41	u32 interface_pix_fmt;
	42	int mode_valid;
	43	struct drm_display_mode mode;
628f435b	44	struct drm_panel *panel;
19022aaa SH	45	};
	46
	47	static enum drm_connector_status imx_pd_connector_detect(
	48	struct drm_connector *connector, bool force)
	49	{
	50	return connector_status_connected;
	51	}
	52
19022aaa SH	53	static int imx_pd_connector_get_modes(struct drm_connector *connector)
	54	{
	55	struct imx_parallel_display *imxpd = con_to_imxpd(connector);
afb12edf	56	struct device_node *np = imxpd->dev->of_node;
19022aaa SH	57	int num_modes = 0;
19022aaa SH	58
628f435b PZ	59	if (imxpd->panel && imxpd->panel->funcs &&
	60	imxpd->panel->funcs->get_modes) {
	61	num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
	62	if (num_modes > 0)
	63	return num_modes;
	64	}
	65
19022aaa SH	66	if (imxpd->edid) {
	67	drm_mode_connector_update_edid_property(connector, imxpd->edid);
	68	num_modes = drm_add_edid_modes(connector, imxpd->edid);
	69	}
	70
	71	if (imxpd->mode_valid) {
	72	struct drm_display_mode *mode = drm_mode_create(connector->dev);
	73	drm_mode_copy(mode, &imxpd->mode);
	74	mode->type \|= DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED,
afb12edf MV	75	drm_mode_probed_add(connector, mode);
	76	num_modes++;
	77	}
	78
	79	if (np) {
	80	struct drm_display_mode *mode = drm_mode_create(connector->dev);
075c457b	81	of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
afb12edf MV	82	drm_mode_copy(mode, &imxpd->mode);
afb12edf MV	83	mode->type \|= DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED,
19022aaa SH	84	drm_mode_probed_add(connector, mode);
	85	num_modes++;
	86	}
	87
	88	return num_modes;
	89	}
	90
19022aaa SH	91	static struct drm_encoder *imx_pd_connector_best_encoder(
	92	struct drm_connector *connector)
	93	{
	94	struct imx_parallel_display *imxpd = con_to_imxpd(connector);
	95
	96	return &imxpd->encoder;
	97	}
	98
	99	static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
	100	{
628f435b PZ	101	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
	102
	103	if (mode != DRM_MODE_DPMS_ON)
	104	drm_panel_disable(imxpd->panel);
	105	else
	106	drm_panel_enable(imxpd->panel);
19022aaa SH	107	}
	108
	109	static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
	110	const struct drm_display_mode *mode,
	111	struct drm_display_mode *adjusted_mode)
	112	{
	113	return true;
	114	}
	115
	116	static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
	117	{
	118	struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
	119
f2d66aad	120	imx_drm_panel_format(encoder, imxpd->interface_pix_fmt);
19022aaa SH	121	}
	122
	123	static void imx_pd_encoder_commit(struct drm_encoder *encoder)
	124	{
	125	}
	126
	127	static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
	128	struct drm_display_mode *mode,
	129	struct drm_display_mode *adjusted_mode)
	130	{
	131	}
	132
	133	static void imx_pd_encoder_disable(struct drm_encoder *encoder)
	134	{
	135	}
	136
19022aaa SH	137	static struct drm_connector_funcs imx_pd_connector_funcs = {
	138	.dpms = drm_helper_connector_dpms,
	139	.fill_modes = drm_helper_probe_single_connector_modes,
	140	.detect = imx_pd_connector_detect,
1b3f7675	141	.destroy = imx_drm_connector_destroy,
19022aaa SH	142	};
	143
	144	static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
	145	.get_modes = imx_pd_connector_get_modes,
	146	.best_encoder = imx_pd_connector_best_encoder,
baa68c4b	147	.mode_valid = imx_drm_connector_mode_valid,
19022aaa SH	148	};
	149
	150	static struct drm_encoder_funcs imx_pd_encoder_funcs = {
1b3f7675	151	.destroy = imx_drm_encoder_destroy,
19022aaa SH	152	};
	153
	154	static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
	155	.dpms = imx_pd_encoder_dpms,
	156	.mode_fixup = imx_pd_encoder_mode_fixup,
	157	.prepare = imx_pd_encoder_prepare,
	158	.commit = imx_pd_encoder_commit,
	159	.mode_set = imx_pd_encoder_mode_set,
	160	.disable = imx_pd_encoder_disable,
	161	};
	162
1b3f7675 RK	163	static int imx_pd_register(struct drm_device *drm,
1b3f7675 RK	164	struct imx_parallel_display *imxpd)
19022aaa SH	165	{
	166	int ret;
	167
1b3f7675 RK	168	ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder,
	169	imxpd->dev->of_node);
	170	if (ret)
	171	return ret;
19022aaa SH	172
19022aaa SH	173	drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
1b3f7675 RK	174	drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
1b3f7675 RK	175	DRM_MODE_ENCODER_NONE);
19022aaa SH	176
	177	drm_connector_helper_add(&imxpd->connector,
	178	&imx_pd_connector_helper_funcs);
1b3f7675 RK	179	drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs,
1b3f7675 RK	180	DRM_MODE_CONNECTOR_VGA);
19022aaa	181
628f435b PZ	182	if (imxpd->panel)
	183	drm_panel_attach(imxpd->panel, &imxpd->connector);
	184
1b3f7675	185	drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);
19022aaa SH	186
	187	imxpd->connector.encoder = &imxpd->encoder;
	188
	189	return 0;
	190	}
	191
17b5001b	192	static int imx_pd_bind(struct device dev, struct device master, void *data)
19022aaa	193	{
1b3f7675	194	struct drm_device *drm = data;
17b5001b	195	struct device_node *np = dev->of_node;
628f435b	196	struct device_node *panel_node;
19022aaa SH	197	const u8 *edidp;
	198	struct imx_parallel_display *imxpd;
	199	int ret;
	200	const char *fmt;
	201
17b5001b	202	imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
19022aaa SH	203	if (!imxpd)
	204	return -ENOMEM;
	205
	206	edidp = of_get_property(np, "edid", &imxpd->edid_len);
	207	if (edidp)
	208	imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
	209
	210	ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
	211	if (!ret) {
	212	if (!strcmp(fmt, "rgb24"))
	213	imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24;
	214	else if (!strcmp(fmt, "rgb565"))
	215	imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565;
7d0a66c0 MV	216	else if (!strcmp(fmt, "bgr666"))
7d0a66c0 MV	217	imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666;
19022aaa SH	218	}
19022aaa SH	219
628f435b PZ	220	panel_node = of_parse_phandle(np, "fsl,panel", 0);
	221	if (panel_node)
	222	imxpd->panel = of_drm_find_panel(panel_node);
	223
17b5001b	224	imxpd->dev = dev;
19022aaa	225
1b3f7675	226	ret = imx_pd_register(drm, imxpd);
19022aaa SH	227	if (ret)
	228	return ret;
	229
17b5001b	230	dev_set_drvdata(dev, imxpd);
19022aaa SH	231
	232	return 0;
	233	}
	234
17b5001b RK	235	static void imx_pd_unbind(struct device dev, struct device master,
17b5001b RK	236	void *data)
19022aaa	237	{
17b5001b	238	struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
19022aaa	239
1b3f7675 RK	240	imxpd->encoder.funcs->destroy(&imxpd->encoder);
1b3f7675 RK	241	imxpd->connector.funcs->destroy(&imxpd->connector);
17b5001b	242	}
19022aaa	243
17b5001b RK	244	static const struct component_ops imx_pd_ops = {
	245	.bind = imx_pd_bind,
	246	.unbind = imx_pd_unbind,
	247	};
	248
	249	static int imx_pd_probe(struct platform_device *pdev)
	250	{
	251	return component_add(&pdev->dev, &imx_pd_ops);
	252	}
	253
	254	static int imx_pd_remove(struct platform_device *pdev)
	255	{
	256	component_del(&pdev->dev, &imx_pd_ops);
19022aaa SH	257	return 0;
	258	}
	259
	260	static const struct of_device_id imx_pd_dt_ids[] = {
	261	{ .compatible = "fsl,imx-parallel-display", },
	262	{ /* sentinel */ }
	263	};
fa45f2c7	264	MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
19022aaa SH	265
	266	static struct platform_driver imx_pd_driver = {
	267	.probe = imx_pd_probe,
99c28f10	268	.remove = imx_pd_remove,
19022aaa SH	269	.driver = {
	270	.of_match_table = imx_pd_dt_ids,
	271	.name = "imx-parallel-display",
	272	.owner = THIS_MODULE,
	273	},
	274	};
	275
	276	module_platform_driver(imx_pd_driver);
	277
	278	MODULE_DESCRIPTION("i.MX parallel display driver");
	279	MODULE_AUTHOR("Sascha Hauer, Pengutronix");
	280	MODULE_LICENSE("GPL");
b2da05ff	281	MODULE_ALIAS("platform:imx-parallel-display");