[deliverable/linux.git] / drivers / gpu / drm / atmel-hlcdc / atmel_hlcdc_output.c

/*
 * Copyright (C) 2014 Traphandler
 * Copyright (C) 2014 Free Electrons
 * Copyright (C) 2014 Atmel
 *
 * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
 * Author: Boris BREZILLON <boris.brezillon@free-electrons.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/of_graph.h>

#include <drm/drmP.h>
#include <drm/drm_panel.h>

#include "atmel_hlcdc_dc.h"

/**
 * Atmel HLCDC RGB output mode
 */
enum atmel_hlcdc_connector_rgb_mode {
	ATMEL_HLCDC_CONNECTOR_RGB444,
	ATMEL_HLCDC_CONNECTOR_RGB565,
	ATMEL_HLCDC_CONNECTOR_RGB666,
	ATMEL_HLCDC_CONNECTOR_RGB888,
};

/**
 * Atmel HLCDC RGB connector structure
 *
 * This structure stores RGB slave device information.
 *
 * @connector: DRM connector
 * @encoder: DRM encoder
 * @dc: pointer to the atmel_hlcdc_dc structure
 * @dpms: current DPMS mode
 */
struct atmel_hlcdc_rgb_output {
	struct drm_connector connector;
	struct drm_encoder encoder;
	struct atmel_hlcdc_dc *dc;
	int dpms;
};

static inline struct atmel_hlcdc_rgb_output *
drm_connector_to_atmel_hlcdc_rgb_output(struct drm_connector *connector)
{
	return container_of(connector, struct atmel_hlcdc_rgb_output,
			    connector);
}

static inline struct atmel_hlcdc_rgb_output *
drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder)
{
	return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder);
}

/**
 * Atmel HLCDC Panel device structure
 *
 * This structure is specialization of the slave device structure to
 * interface with drm panels.
 *
 * @base: base slave device fields
 * @panel: drm panel attached to this slave device
 */
struct atmel_hlcdc_panel {
	struct atmel_hlcdc_rgb_output base;
	struct drm_panel *panel;
};

static inline struct atmel_hlcdc_panel *
atmel_hlcdc_rgb_output_to_panel(struct atmel_hlcdc_rgb_output *output)
{
	return container_of(output, struct atmel_hlcdc_panel, base);
}

static void atmel_hlcdc_panel_encoder_enable(struct drm_encoder *encoder)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
	struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);

	drm_panel_enable(panel->panel);
}

static void atmel_hlcdc_panel_encoder_disable(struct drm_encoder *encoder)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
	struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);

	drm_panel_disable(panel->panel);
}

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

static void
atmel_hlcdc_rgb_encoder_mode_set(struct drm_encoder *encoder,
				 struct drm_display_mode *mode,
				 struct drm_display_mode *adjusted)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
	struct drm_display_info *info = &rgb->connector.display_info;
	unsigned int cfg;

	cfg = 0;

	if (info->num_bus_formats) {
		switch (info->bus_formats[0]) {
		case MEDIA_BUS_FMT_RGB666_1X18:
			cfg |= ATMEL_HLCDC_CONNECTOR_RGB666 << 8;
			break;
		case MEDIA_BUS_FMT_RGB888_1X24:
			cfg |= ATMEL_HLCDC_CONNECTOR_RGB888 << 8;
			break;
		default:
			break;
		}
	}

	regmap_update_bits(rgb->dc->hlcdc->regmap, ATMEL_HLCDC_CFG(5),
			   ATMEL_HLCDC_MODE_MASK,
			   cfg);
}

static struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = {
	.mode_fixup = atmel_hlcdc_panel_encoder_mode_fixup,
	.mode_set = atmel_hlcdc_rgb_encoder_mode_set,
	.disable = atmel_hlcdc_panel_encoder_disable,
	.enable = atmel_hlcdc_panel_encoder_enable,
};

static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
	memset(encoder, 0, sizeof(*encoder));
}

static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
	.destroy = atmel_hlcdc_rgb_encoder_destroy,
};

static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);
	struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);

	return panel->panel->funcs->get_modes(panel->panel);
}

static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector,
				      struct drm_display_mode *mode)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);

	return atmel_hlcdc_dc_mode_valid(rgb->dc, mode);
}


static struct drm_encoder *
atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);

	return &rgb->encoder;
}

static struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = {
	.get_modes = atmel_hlcdc_panel_get_modes,
	.mode_valid = atmel_hlcdc_rgb_mode_valid,
	.best_encoder = atmel_hlcdc_rgb_best_encoder,
};

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

static void
atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector)
{
	struct atmel_hlcdc_rgb_output *rgb =
			drm_connector_to_atmel_hlcdc_rgb_output(connector);
	struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);

	drm_panel_detach(panel->panel);
	drm_connector_cleanup(connector);
}

static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.detect = atmel_hlcdc_panel_connector_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = atmel_hlcdc_panel_connector_destroy,
	.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 int atmel_hlcdc_create_panel_output(struct drm_device *dev,
					   struct of_endpoint *ep)
{
	struct atmel_hlcdc_dc *dc = dev->dev_private;
	struct device_node *np;
	struct drm_panel *p = NULL;
	struct atmel_hlcdc_panel *panel;
	int ret;

	np = of_graph_get_remote_port_parent(ep->local_node);
	if (!np)
		return -EINVAL;

	p = of_drm_find_panel(np);
	of_node_put(np);

	if (!p)
		return -EPROBE_DEFER;

	panel = devm_kzalloc(dev->dev, sizeof(*panel), GFP_KERNEL);
	if (!panel)
		return -EINVAL;

	panel->base.dpms = DRM_MODE_DPMS_OFF;

	panel->base.dc = dc;

	drm_encoder_helper_add(&panel->base.encoder,
			       &atmel_hlcdc_panel_encoder_helper_funcs);
	ret = drm_encoder_init(dev, &panel->base.encoder,
			       &atmel_hlcdc_panel_encoder_funcs,
			       DRM_MODE_ENCODER_LVDS);
	if (ret)
		return ret;

	panel->base.connector.dpms = DRM_MODE_DPMS_OFF;
	panel->base.connector.polled = DRM_CONNECTOR_POLL_CONNECT;
	drm_connector_helper_add(&panel->base.connector,
				 &atmel_hlcdc_panel_connector_helper_funcs);
	ret = drm_connector_init(dev, &panel->base.connector,
				 &atmel_hlcdc_panel_connector_funcs,
				 DRM_MODE_CONNECTOR_LVDS);
	if (ret)
		goto err_encoder_cleanup;

	drm_mode_connector_attach_encoder(&panel->base.connector,
					  &panel->base.encoder);
	panel->base.encoder.possible_crtcs = 0x1;

	drm_panel_attach(p, &panel->base.connector);
	panel->panel = p;

	return 0;

err_encoder_cleanup:
	drm_encoder_cleanup(&panel->base.encoder);

	return ret;
}

int atmel_hlcdc_create_outputs(struct drm_device *dev)
{
	struct device_node *port_np, *np;
	struct of_endpoint ep;
	int ret;

	port_np = of_get_child_by_name(dev->dev->of_node, "port");
	if (!port_np)
		return -EINVAL;

	np = of_get_child_by_name(port_np, "endpoint");
	of_node_put(port_np);

	if (!np)
		return -EINVAL;

	ret = of_graph_parse_endpoint(np, &ep);
	of_node_put(port_np);

	if (ret)
		return ret;

	/* We currently only support panel output */
	return atmel_hlcdc_create_panel_output(dev, &ep);
}
Commit	Line	Data
1a396789 BB	1	/*
	2	* Copyright (C) 2014 Traphandler
	3	* Copyright (C) 2014 Free Electrons
	4	* Copyright (C) 2014 Atmel
	5	*
	6	* Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
	7	* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License version 2 as published by
	11	* the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful, but WITHOUT
	14	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	15	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	16	* more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along with
	19	* this program. If not, see <http://www.gnu.org/licenses/>.
	20	*/
	21
	22	#include <linux/of_graph.h>
	23
	24	#include <drm/drmP.h>
	25	#include <drm/drm_panel.h>
	26
	27	#include "atmel_hlcdc_dc.h"
	28
	29	/**
	30	* Atmel HLCDC RGB output mode
	31	*/
	32	enum atmel_hlcdc_connector_rgb_mode {
	33	ATMEL_HLCDC_CONNECTOR_RGB444,
	34	ATMEL_HLCDC_CONNECTOR_RGB565,
	35	ATMEL_HLCDC_CONNECTOR_RGB666,
	36	ATMEL_HLCDC_CONNECTOR_RGB888,
	37	};
	38
	39	/**
	40	* Atmel HLCDC RGB connector structure
	41	*
	42	* This structure stores RGB slave device information.
	43	*
	44	* @connector: DRM connector
	45	* @encoder: DRM encoder
	46	* @dc: pointer to the atmel_hlcdc_dc structure
	47	* @dpms: current DPMS mode
	48	*/
	49	struct atmel_hlcdc_rgb_output {
	50	struct drm_connector connector;
	51	struct drm_encoder encoder;
	52	struct atmel_hlcdc_dc *dc;
	53	int dpms;
	54	};
	55
	56	static inline struct atmel_hlcdc_rgb_output *
	57	drm_connector_to_atmel_hlcdc_rgb_output(struct drm_connector *connector)
	58	{
	59	return container_of(connector, struct atmel_hlcdc_rgb_output,
	60	connector);
	61	}
	62
	63	static inline struct atmel_hlcdc_rgb_output *
	64	drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder)
65	{
66	return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder);
67	}
68
69	/**
70	* Atmel HLCDC Panel device structure
71	*
72	* This structure is specialization of the slave device structure to
73	* interface with drm panels.
74	*
75	* @base: base slave device fields
76	* @panel: drm panel attached to this slave device
77	*/
78	struct atmel_hlcdc_panel {
79	struct atmel_hlcdc_rgb_output base;
80	struct drm_panel *panel;
81	};
82
83	static inline struct atmel_hlcdc_panel *
84	atmel_hlcdc_rgb_output_to_panel(struct atmel_hlcdc_rgb_output *output)
85	{
86	return container_of(output, struct atmel_hlcdc_panel, base);
87	}
88
2389fc13	89	static void atmel_hlcdc_panel_encoder_enable(struct drm_encoder *encoder)
1a396789 BB	90	{
	91	struct atmel_hlcdc_rgb_output *rgb =
	92	drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
	93	struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
	94
2389fc13 BB	95	drm_panel_enable(panel->panel);
2389fc13 BB	96	}
1a396789	97
2389fc13 BB	98	static void atmel_hlcdc_panel_encoder_disable(struct drm_encoder *encoder)
	99	{
	100	struct atmel_hlcdc_rgb_output *rgb =
	101	drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
	102	struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
1a396789	103
2389fc13	104	drm_panel_disable(panel->panel);
1a396789 BB	105	}
	106
	107	static bool
	108	atmel_hlcdc_panel_encoder_mode_fixup(struct drm_encoder *encoder,
	109	const struct drm_display_mode *mode,
	110	struct drm_display_mode *adjusted)
	111	{
	112	return true;
	113	}
	114
1a396789 BB	115	static void
	116	atmel_hlcdc_rgb_encoder_mode_set(struct drm_encoder *encoder,
	117	struct drm_display_mode *mode,
	118	struct drm_display_mode *adjusted)
	119	{
	120	struct atmel_hlcdc_rgb_output *rgb =
	121	drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
	122	struct drm_display_info *info = &rgb->connector.display_info;
	123	unsigned int cfg;
	124
	125	cfg = 0;
	126
	127	if (info->num_bus_formats) {
	128	switch (info->bus_formats[0]) {
	129	case MEDIA_BUS_FMT_RGB666_1X18:
	130	cfg \|= ATMEL_HLCDC_CONNECTOR_RGB666 << 8;
	131	break;
	132	case MEDIA_BUS_FMT_RGB888_1X24:
	133	cfg \|= ATMEL_HLCDC_CONNECTOR_RGB888 << 8;
	134	break;
	135	default:
	136	break;
	137	}
	138	}
	139
	140	regmap_update_bits(rgb->dc->hlcdc->regmap, ATMEL_HLCDC_CFG(5),
	141	ATMEL_HLCDC_MODE_MASK,
	142	cfg);
	143	}
	144
	145	static struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = {
1a396789	146	.mode_fixup = atmel_hlcdc_panel_encoder_mode_fixup,
1a396789	147	.mode_set = atmel_hlcdc_rgb_encoder_mode_set,
2389fc13 BB	148	.disable = atmel_hlcdc_panel_encoder_disable,
2389fc13 BB	149	.enable = atmel_hlcdc_panel_encoder_enable,
1a396789 BB	150	};
	151
	152	static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder)
	153	{
	154	drm_encoder_cleanup(encoder);
	155	memset(encoder, 0, sizeof(*encoder));
	156	}
	157
	158	static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
	159	.destroy = atmel_hlcdc_rgb_encoder_destroy,
	160	};
	161
	162	static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector)
	163	{
	164	struct atmel_hlcdc_rgb_output *rgb =
	165	drm_connector_to_atmel_hlcdc_rgb_output(connector);
	166	struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
	167
	168	return panel->panel->funcs->get_modes(panel->panel);
	169	}
	170
	171	static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector,
	172	struct drm_display_mode *mode)
	173	{
	174	struct atmel_hlcdc_rgb_output *rgb =
	175	drm_connector_to_atmel_hlcdc_rgb_output(connector);
	176
	177	return atmel_hlcdc_dc_mode_valid(rgb->dc, mode);
	178	}
	179
	180
	181
	182	static struct drm_encoder *
	183	atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector)
	184	{
	185	struct atmel_hlcdc_rgb_output *rgb =
	186	drm_connector_to_atmel_hlcdc_rgb_output(connector);
	187
	188	return &rgb->encoder;
	189	}
	190
	191	static struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = {
	192	.get_modes = atmel_hlcdc_panel_get_modes,
	193	.mode_valid = atmel_hlcdc_rgb_mode_valid,
	194	.best_encoder = atmel_hlcdc_rgb_best_encoder,
	195	};
	196
	197	static enum drm_connector_status
	198	atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force)
	199	{
	200	return connector_status_connected;
	201	}
	202
	203	static void
	204	atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector)
	205	{
	206	struct atmel_hlcdc_rgb_output *rgb =
	207	drm_connector_to_atmel_hlcdc_rgb_output(connector);
	208	struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
	209
	210	drm_panel_detach(panel->panel);
	211	drm_connector_cleanup(connector);
	212	}
	213
214	static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
2389fc13	215	.dpms = drm_atomic_helper_connector_dpms,
1a396789 BB	216	.detect = atmel_hlcdc_panel_connector_detect,
	217	.fill_modes = drm_helper_probe_single_connector_modes,
	218	.destroy = atmel_hlcdc_panel_connector_destroy,
2389fc13 BB	219	.reset = drm_atomic_helper_connector_reset,
	220	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	221	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1a396789 BB	222	};
	223
	224	static int atmel_hlcdc_create_panel_output(struct drm_device *dev,
	225	struct of_endpoint *ep)
	226	{
	227	struct atmel_hlcdc_dc *dc = dev->dev_private;
	228	struct device_node *np;
	229	struct drm_panel *p = NULL;
	230	struct atmel_hlcdc_panel *panel;
	231	int ret;
	232
	233	np = of_graph_get_remote_port_parent(ep->local_node);
	234	if (!np)
	235	return -EINVAL;
	236
	237	p = of_drm_find_panel(np);
	238	of_node_put(np);
	239
	240	if (!p)
	241	return -EPROBE_DEFER;
	242
	243	panel = devm_kzalloc(dev->dev, sizeof(*panel), GFP_KERNEL);
	244	if (!panel)
	245	return -EINVAL;
	246
	247	panel->base.dpms = DRM_MODE_DPMS_OFF;
	248
	249	panel->base.dc = dc;
	250
	251	drm_encoder_helper_add(&panel->base.encoder,
	252	&atmel_hlcdc_panel_encoder_helper_funcs);
	253	ret = drm_encoder_init(dev, &panel->base.encoder,
	254	&atmel_hlcdc_panel_encoder_funcs,
	255	DRM_MODE_ENCODER_LVDS);
	256	if (ret)
	257	return ret;
	258
	259	panel->base.connector.dpms = DRM_MODE_DPMS_OFF;
	260	panel->base.connector.polled = DRM_CONNECTOR_POLL_CONNECT;
	261	drm_connector_helper_add(&panel->base.connector,
	262	&atmel_hlcdc_panel_connector_helper_funcs);
	263	ret = drm_connector_init(dev, &panel->base.connector,
	264	&atmel_hlcdc_panel_connector_funcs,
	265	DRM_MODE_CONNECTOR_LVDS);
	266	if (ret)
	267	goto err_encoder_cleanup;
	268
	269	drm_mode_connector_attach_encoder(&panel->base.connector,
	270	&panel->base.encoder);
	271	panel->base.encoder.possible_crtcs = 0x1;
	272
	273	drm_panel_attach(p, &panel->base.connector);
	274	panel->panel = p;
	275
	276	return 0;
	277
	278	err_encoder_cleanup:
	279	drm_encoder_cleanup(&panel->base.encoder);
	280
	281	return ret;
	282	}
	283
	284	int atmel_hlcdc_create_outputs(struct drm_device *dev)
	285	{
286	struct device_node port_np, np;
287	struct of_endpoint ep;
288	int ret;
289
290	port_np = of_get_child_by_name(dev->dev->of_node, "port");
291	if (!port_np)
292	return -EINVAL;
293
294	np = of_get_child_by_name(port_np, "endpoint");
295	of_node_put(port_np);
296
297	if (!np)
298	return -EINVAL;
299
300	ret = of_graph_parse_endpoint(np, &ep);
301	of_node_put(port_np);
302
303	if (ret)
304	return ret;
305
306	/* We currently only support panel output */
307	return atmel_hlcdc_create_panel_output(dev, &ep);
308	}