[linux-2.6-block.git] / drivers / gpu / drm / imx / parallel-display.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * i.MX drm driver - parallel display implementation
 *
 * Copyright (C) 2012 Sascha Hauer, Pengutronix
 */

#include <linux/component.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>

#include <video/of_display_timing.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_edid.h>
#include <drm/drm_managed.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>

#include "imx-drm.h"

struct imx_parallel_display_encoder {
	struct drm_connector connector;
	struct drm_encoder encoder;
	struct drm_bridge bridge;
	struct imx_parallel_display *pd;
};

struct imx_parallel_display {
	struct device *dev;
	void *edid;
	u32 bus_format;
	u32 bus_flags;
	struct drm_display_mode mode;
	struct drm_panel *panel;
	struct drm_bridge *next_bridge;
};

static inline struct imx_parallel_display *con_to_imxpd(struct drm_connector *c)
{
	return container_of(c, struct imx_parallel_display_encoder, connector)->pd;
}

static inline struct imx_parallel_display *bridge_to_imxpd(struct drm_bridge *b)
{
	return container_of(b, struct imx_parallel_display_encoder, bridge)->pd;
}

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;

	num_modes = drm_panel_get_modes(imxpd->panel, connector);
	if (num_modes > 0)
		return num_modes;

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

	if (np) {
		struct drm_display_mode *mode = drm_mode_create(connector->dev);
		int ret;

		if (!mode)
			return -EINVAL;

		ret = of_get_drm_display_mode(np, &imxpd->mode,
					      &imxpd->bus_flags,
					      OF_USE_NATIVE_MODE);
		if (ret) {
			drm_mode_destroy(connector->dev, mode);
			return ret;
		}

		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 void imx_pd_bridge_enable(struct drm_bridge *bridge)
{
	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);

	drm_panel_prepare(imxpd->panel);
	drm_panel_enable(imxpd->panel);
}

static void imx_pd_bridge_disable(struct drm_bridge *bridge)
{
	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);

	drm_panel_disable(imxpd->panel);
	drm_panel_unprepare(imxpd->panel);
}

static const u32 imx_pd_bus_fmts[] = {
	MEDIA_BUS_FMT_RGB888_1X24,
	MEDIA_BUS_FMT_BGR888_1X24,
	MEDIA_BUS_FMT_GBR888_1X24,
	MEDIA_BUS_FMT_RGB666_1X18,
	MEDIA_BUS_FMT_RGB666_1X24_CPADHI,
	MEDIA_BUS_FMT_RGB565_1X16,
};

static u32 *
imx_pd_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
					 struct drm_bridge_state *bridge_state,
					 struct drm_crtc_state *crtc_state,
					 struct drm_connector_state *conn_state,
					 unsigned int *num_output_fmts)
{
	struct drm_display_info *di = &conn_state->connector->display_info;
	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
	u32 *output_fmts;

	if (!imxpd->bus_format && !di->num_bus_formats) {
		*num_output_fmts = ARRAY_SIZE(imx_pd_bus_fmts);
		return kmemdup(imx_pd_bus_fmts, sizeof(imx_pd_bus_fmts),
			       GFP_KERNEL);
	}

	*num_output_fmts = 1;
	output_fmts = kmalloc(sizeof(*output_fmts), GFP_KERNEL);
	if (!output_fmts)
		return NULL;

	if (!imxpd->bus_format && di->num_bus_formats)
		output_fmts[0] = di->bus_formats[0];
	else
		output_fmts[0] = imxpd->bus_format;

	return output_fmts;
}

static bool imx_pd_format_supported(u32 output_fmt)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(imx_pd_bus_fmts); i++) {
		if (imx_pd_bus_fmts[i] == output_fmt)
			return true;
	}

	return false;
}

static u32 *
imx_pd_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
					struct drm_bridge_state *bridge_state,
					struct drm_crtc_state *crtc_state,
					struct drm_connector_state *conn_state,
					u32 output_fmt,
					unsigned int *num_input_fmts)
{
	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
	u32 *input_fmts;

	/*
	 * If the next bridge does not support bus format negotiation, let's
	 * use the static bus format definition (imxpd->bus_format) if it's
	 * specified, RGB888 when it's not.
	 */
	if (output_fmt == MEDIA_BUS_FMT_FIXED)
		output_fmt = imxpd->bus_format ? : MEDIA_BUS_FMT_RGB888_1X24;

	/* Now make sure the requested output format is supported. */
	if ((imxpd->bus_format && imxpd->bus_format != output_fmt) ||
	    !imx_pd_format_supported(output_fmt)) {
		*num_input_fmts = 0;
		return NULL;
	}

	*num_input_fmts = 1;
	input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
	if (!input_fmts)
		return NULL;

	input_fmts[0] = output_fmt;
	return input_fmts;
}

static int imx_pd_bridge_atomic_check(struct drm_bridge *bridge,
				      struct drm_bridge_state *bridge_state,
				      struct drm_crtc_state *crtc_state,
				      struct drm_connector_state *conn_state)
{
	struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
	struct drm_display_info *di = &conn_state->connector->display_info;
	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
	struct drm_bridge_state *next_bridge_state = NULL;
	struct drm_bridge *next_bridge;
	u32 bus_flags, bus_fmt;

	next_bridge = drm_bridge_get_next_bridge(bridge);
	if (next_bridge)
		next_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
								    next_bridge);

	if (next_bridge_state)
		bus_flags = next_bridge_state->input_bus_cfg.flags;
	else if (di->num_bus_formats)
		bus_flags = di->bus_flags;
	else
		bus_flags = imxpd->bus_flags;

	bus_fmt = bridge_state->input_bus_cfg.format;
	if (!imx_pd_format_supported(bus_fmt))
		return -EINVAL;

	bridge_state->output_bus_cfg.flags = bus_flags;
	bridge_state->input_bus_cfg.flags = bus_flags;
	imx_crtc_state->bus_flags = bus_flags;
	imx_crtc_state->bus_format = bridge_state->input_bus_cfg.format;
	imx_crtc_state->di_hsync_pin = 2;
	imx_crtc_state->di_vsync_pin = 3;

	return 0;
}

static const struct drm_connector_funcs imx_pd_connector_funcs = {
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = imx_drm_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 const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
	.get_modes = imx_pd_connector_get_modes,
};

static const struct drm_bridge_funcs imx_pd_bridge_funcs = {
	.enable = imx_pd_bridge_enable,
	.disable = imx_pd_bridge_disable,
	.atomic_reset = drm_atomic_helper_bridge_reset,
	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
	.atomic_check = imx_pd_bridge_atomic_check,
	.atomic_get_input_bus_fmts = imx_pd_bridge_atomic_get_input_bus_fmts,
	.atomic_get_output_bus_fmts = imx_pd_bridge_atomic_get_output_bus_fmts,
};

static int imx_pd_bind(struct device *dev, struct device *master, void *data)
{
	struct drm_device *drm = data;
	struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
	struct imx_parallel_display_encoder *imxpd_encoder;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	struct drm_bridge *bridge;
	int ret;

	imxpd_encoder = drmm_simple_encoder_alloc(drm, struct imx_parallel_display_encoder,
						  encoder, DRM_MODE_ENCODER_NONE);
	if (IS_ERR(imxpd_encoder))
		return PTR_ERR(imxpd_encoder);

	imxpd_encoder->pd = imxpd;
	connector = &imxpd_encoder->connector;
	encoder = &imxpd_encoder->encoder;
	bridge = &imxpd_encoder->bridge;

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

	/* set the connector's dpms to OFF so that
	 * drm_helper_connector_dpms() won't return
	 * immediately since the current state is ON
	 * at this point.
	 */
	connector->dpms = DRM_MODE_DPMS_OFF;

	bridge->funcs = &imx_pd_bridge_funcs;
	drm_bridge_attach(encoder, bridge, NULL, 0);

	if (imxpd->next_bridge) {
		ret = drm_bridge_attach(encoder, imxpd->next_bridge, bridge, 0);
		if (ret < 0)
			return ret;
	} else {
		drm_connector_helper_add(connector,
					 &imx_pd_connector_helper_funcs);
		drm_connector_init(drm, connector, &imx_pd_connector_funcs,
				   DRM_MODE_CONNECTOR_DPI);

		drm_connector_attach_encoder(connector, encoder);
	}

	return 0;
}

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

static int imx_pd_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	const u8 *edidp;
	struct imx_parallel_display *imxpd;
	int edid_len;
	int ret;
	u32 bus_format = 0;
	const char *fmt;

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

	/* port@1 is the output port */
	ret = drm_of_find_panel_or_bridge(np, 1, 0, &imxpd->panel,
					  &imxpd->next_bridge);
	if (ret && ret != -ENODEV)
		return ret;

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

	ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
	if (!ret) {
		if (!strcmp(fmt, "rgb24"))
			bus_format = MEDIA_BUS_FMT_RGB888_1X24;
		else if (!strcmp(fmt, "rgb565"))
			bus_format = MEDIA_BUS_FMT_RGB565_1X16;
		else if (!strcmp(fmt, "bgr666"))
			bus_format = MEDIA_BUS_FMT_RGB666_1X18;
		else if (!strcmp(fmt, "lvds666"))
			bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
	}
	imxpd->bus_format = bus_format;

	imxpd->dev = dev;

	platform_set_drvdata(pdev, imxpd);

	return component_add(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",
	},
};

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
946485d0	1	// SPDX-License-Identifier: GPL-2.0+
19022aaa SH	2	/*
	3	* i.MX drm driver - parallel display implementation
	4	*
	5	* Copyright (C) 2012 Sascha Hauer, Pengutronix
19022aaa SH	6	*/
19022aaa SH	7
17b5001b	8	#include <linux/component.h>
72bd9ea3	9	#include <linux/media-bus-format.h>
19022aaa	10	#include <linux/module.h>
45b64fd9	11	#include <linux/of.h>
05f0940b SR	12	#include <linux/platform_device.h>
	13	#include <linux/videodev2.h>
	14
	15	#include <video/of_display_timing.h>
	16
255c35f8	17	#include <drm/drm_atomic_helper.h>
ee68c743	18	#include <drm/drm_bridge.h>
255490f9	19	#include <drm/drm_edid.h>
c0ad88a9	20	#include <drm/drm_managed.h>
ebc94461	21	#include <drm/drm_of.h>
628f435b	22	#include <drm/drm_panel.h>
fcd70cd3	23	#include <drm/drm_probe_helper.h>
62fbddda	24	#include <drm/drm_simple_kms_helper.h>
19022aaa SH	25
	26	#include "imx-drm.h"
	27
c0ad88a9	28	struct imx_parallel_display_encoder {
19022aaa	29	struct drm_connector connector;
49f98bc4	30	struct drm_encoder encoder;
fe141ced	31	struct drm_bridge bridge;
c0ad88a9 PZ	32	struct imx_parallel_display *pd;
	33	};
	34
	35	struct imx_parallel_display {
19022aaa SH	36	struct device *dev;
19022aaa SH	37	void *edid;
49f98bc4	38	u32 bus_format;
fafc79ef	39	u32 bus_flags;
19022aaa	40	struct drm_display_mode mode;
628f435b	41	struct drm_panel *panel;
fe141ced	42	struct drm_bridge *next_bridge;
19022aaa SH	43	};
19022aaa SH	44
3df07390 PZ	45	static inline struct imx_parallel_display con_to_imxpd(struct drm_connector c)
3df07390 PZ	46	{
c0ad88a9	47	return container_of(c, struct imx_parallel_display_encoder, connector)->pd;
3df07390 PZ	48	}
3df07390 PZ	49
fe141ced BB	50	static inline struct imx_parallel_display bridge_to_imxpd(struct drm_bridge b)
fe141ced BB	51	{
c0ad88a9	52	return container_of(b, struct imx_parallel_display_encoder, bridge)->pd;
fe141ced BB	53	}
fe141ced BB	54
19022aaa SH	55	static int imx_pd_connector_get_modes(struct drm_connector *connector)
	56	{
	57	struct imx_parallel_display *imxpd = con_to_imxpd(connector);
afb12edf	58	struct device_node *np = imxpd->dev->of_node;
90fbc510 SR	59	int num_modes;
90fbc510 SR	60
06c4a9c2	61	num_modes = drm_panel_get_modes(imxpd->panel, connector);
90fbc510 SR	62	if (num_modes > 0)
90fbc510 SR	63	return num_modes;
628f435b	64
19022aaa	65	if (imxpd->edid) {
c555f023	66	drm_connector_update_edid_property(connector, imxpd->edid);
19022aaa SH	67	num_modes = drm_add_edid_modes(connector, imxpd->edid);
	68	}
	69
afb12edf MV	70	if (np) {
afb12edf MV	71	struct drm_display_mode *mode = drm_mode_create(connector->dev);
76ecd9c9	72	int ret;
63bc5164	73
39dcf4f7 FE	74	if (!mode)
39dcf4f7 FE	75	return -EINVAL;
76ecd9c9 LW	76
76ecd9c9 LW	77	ret = of_get_drm_display_mode(np, &imxpd->mode,
fafc79ef	78	&imxpd->bus_flags,
76ecd9c9	79	OF_USE_NATIVE_MODE);
bce81feb JE	80	if (ret) {
bce81feb JE	81	drm_mode_destroy(connector->dev, mode);
76ecd9c9	82	return ret;
bce81feb	83	}
76ecd9c9	84
afb12edf	85	drm_mode_copy(mode, &imxpd->mode);
c2d789fb	86	mode->type \|= DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED;
19022aaa SH	87	drm_mode_probed_add(connector, mode);
	88	num_modes++;
	89	}
	90
	91	return num_modes;
	92	}
	93
fe141ced	94	static void imx_pd_bridge_enable(struct drm_bridge *bridge)
19022aaa	95	{
fe141ced	96	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
ad92c8bf PZ	97
	98	drm_panel_prepare(imxpd->panel);
	99	drm_panel_enable(imxpd->panel);
19022aaa SH	100	}
19022aaa SH	101
fe141ced	102	static void imx_pd_bridge_disable(struct drm_bridge *bridge)
19022aaa	103	{
fe141ced	104	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
ad92c8bf PZ	105
	106	drm_panel_disable(imxpd->panel);
	107	drm_panel_unprepare(imxpd->panel);
19022aaa SH	108	}
19022aaa SH	109
fe141ced BB	110	static const u32 imx_pd_bus_fmts[] = {
	111	MEDIA_BUS_FMT_RGB888_1X24,
	112	MEDIA_BUS_FMT_BGR888_1X24,
	113	MEDIA_BUS_FMT_GBR888_1X24,
	114	MEDIA_BUS_FMT_RGB666_1X18,
	115	MEDIA_BUS_FMT_RGB666_1X24_CPADHI,
	116	MEDIA_BUS_FMT_RGB565_1X16,
	117	};
	118
	119	static u32 *
	120	imx_pd_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
	121	struct drm_bridge_state *bridge_state,
	122	struct drm_crtc_state *crtc_state,
	123	struct drm_connector_state *conn_state,
	124	unsigned int *num_output_fmts)
49f98bc4	125	{
49f98bc4	126	struct drm_display_info *di = &conn_state->connector->display_info;
fe141ced BB	127	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
fe141ced BB	128	u32 *output_fmts;
49f98bc4	129
fe141ced BB	130	if (!imxpd->bus_format && !di->num_bus_formats) {
	131	*num_output_fmts = ARRAY_SIZE(imx_pd_bus_fmts);
	132	return kmemdup(imx_pd_bus_fmts, sizeof(imx_pd_bus_fmts),
	133	GFP_KERNEL);
	134	}
	135
	136	*num_output_fmts = 1;
	137	output_fmts = kmalloc(sizeof(*output_fmts), GFP_KERNEL);
	138	if (!output_fmts)
	139	return NULL;
	140
	141	if (!imxpd->bus_format && di->num_bus_formats)
	142	output_fmts[0] = di->bus_formats[0];
	143	else
	144	output_fmts[0] = imxpd->bus_format;
	145
	146	return output_fmts;
	147	}
	148
	149	static bool imx_pd_format_supported(u32 output_fmt)
	150	{
	151	unsigned int i;
	152
	153	for (i = 0; i < ARRAY_SIZE(imx_pd_bus_fmts); i++) {
	154	if (imx_pd_bus_fmts[i] == output_fmt)
	155	return true;
	156	}
	157
	158	return false;
	159	}
	160
	161	static u32 *
	162	imx_pd_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
	163	struct drm_bridge_state *bridge_state,
	164	struct drm_crtc_state *crtc_state,
	165	struct drm_connector_state *conn_state,
	166	u32 output_fmt,
	167	unsigned int *num_input_fmts)
	168	{
	169	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
	170	u32 *input_fmts;
	171
	172	/*
	173	* If the next bridge does not support bus format negotiation, let's
	174	* use the static bus format definition (imxpd->bus_format) if it's
	175	* specified, RGB888 when it's not.
	176	*/
	177	if (output_fmt == MEDIA_BUS_FMT_FIXED)
	178	output_fmt = imxpd->bus_format ? : MEDIA_BUS_FMT_RGB888_1X24;
	179
	180	/* Now make sure the requested output format is supported. */
	181	if ((imxpd->bus_format && imxpd->bus_format != output_fmt) \|\|
	182	!imx_pd_format_supported(output_fmt)) {
	183	*num_input_fmts = 0;
	184	return NULL;
	185	}
	186
	187	*num_input_fmts = 1;
	188	input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
	189	if (!input_fmts)
	190	return NULL;
	191
	192	input_fmts[0] = output_fmt;
	193	return input_fmts;
194	}
195
196	static int imx_pd_bridge_atomic_check(struct drm_bridge *bridge,
197	struct drm_bridge_state *bridge_state,
198	struct drm_crtc_state *crtc_state,
199	struct drm_connector_state *conn_state)
200	{
201	struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
202	struct drm_display_info *di = &conn_state->connector->display_info;
203	struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
204	struct drm_bridge_state *next_bridge_state = NULL;
205	struct drm_bridge *next_bridge;
206	u32 bus_flags, bus_fmt;
207
208	next_bridge = drm_bridge_get_next_bridge(bridge);
209	if (next_bridge)
210	next_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
211	next_bridge);
212
213	if (next_bridge_state)
214	bus_flags = next_bridge_state->input_bus_cfg.flags;
dbd1d67d	215	else if (di->num_bus_formats)
fe141ced BB	216	bus_flags = di->bus_flags;
	217	else
	218	bus_flags = imxpd->bus_flags;
	219
	220	bus_fmt = bridge_state->input_bus_cfg.format;
	221	if (!imx_pd_format_supported(bus_fmt))
	222	return -EINVAL;
	223
fe141ced BB	224	bridge_state->output_bus_cfg.flags = bus_flags;
	225	bridge_state->input_bus_cfg.flags = bus_flags;
	226	imx_crtc_state->bus_flags = bus_flags;
	227	imx_crtc_state->bus_format = bridge_state->input_bus_cfg.format;
49f98bc4 PZ	228	imx_crtc_state->di_hsync_pin = 2;
	229	imx_crtc_state->di_vsync_pin = 3;
	230
	231	return 0;
	232	}
	233
7ae847dd	234	static const struct drm_connector_funcs imx_pd_connector_funcs = {
19022aaa	235	.fill_modes = drm_helper_probe_single_connector_modes,
1b3f7675	236	.destroy = imx_drm_connector_destroy,
255c35f8 LY	237	.reset = drm_atomic_helper_connector_reset,
	238	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	239	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
19022aaa SH	240	};
19022aaa SH	241
7ae847dd	242	static const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
19022aaa	243	.get_modes = imx_pd_connector_get_modes,
19022aaa SH	244	};
19022aaa SH	245
fe141ced BB	246	static const struct drm_bridge_funcs imx_pd_bridge_funcs = {
	247	.enable = imx_pd_bridge_enable,
	248	.disable = imx_pd_bridge_disable,
	249	.atomic_reset = drm_atomic_helper_bridge_reset,
	250	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
	251	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
	252	.atomic_check = imx_pd_bridge_atomic_check,
	253	.atomic_get_input_bus_fmts = imx_pd_bridge_atomic_get_input_bus_fmts,
	254	.atomic_get_output_bus_fmts = imx_pd_bridge_atomic_get_output_bus_fmts,
19022aaa SH	255	};
19022aaa SH	256
c0ad88a9	257	static int imx_pd_bind(struct device dev, struct device master, void *data)
19022aaa	258	{
c0ad88a9 PZ	259	struct drm_device *drm = data;
	260	struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
	261	struct imx_parallel_display_encoder *imxpd_encoder;
	262	struct drm_connector *connector;
	263	struct drm_encoder *encoder;
	264	struct drm_bridge *bridge;
19022aaa SH	265	int ret;
19022aaa SH	266
c0ad88a9 PZ	267	imxpd_encoder = drmm_simple_encoder_alloc(drm, struct imx_parallel_display_encoder,
	268	encoder, DRM_MODE_ENCODER_NONE);
	269	if (IS_ERR(imxpd_encoder))
	270	return PTR_ERR(imxpd_encoder);
	271
	272	imxpd_encoder->pd = imxpd;
	273	connector = &imxpd_encoder->connector;
	274	encoder = &imxpd_encoder->encoder;
	275	bridge = &imxpd_encoder->bridge;
495590c6	276
49f98bc4	277	ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node);
1b3f7675 RK	278	if (ret)
1b3f7675 RK	279	return ret;
19022aaa	280
c026a3f3 DC	281	/* set the connector's dpms to OFF so that
	282	* drm_helper_connector_dpms() won't return
	283	* immediately since the current state is ON
	284	* at this point.
	285	*/
5145fe5b	286	connector->dpms = DRM_MODE_DPMS_OFF;
c026a3f3	287
5145fe5b PZ	288	bridge->funcs = &imx_pd_bridge_funcs;
5145fe5b PZ	289	drm_bridge_attach(encoder, bridge, NULL, 0);
fe141ced	290
fe141ced	291	if (imxpd->next_bridge) {
5145fe5b	292	ret = drm_bridge_attach(encoder, imxpd->next_bridge, bridge, 0);
fb8d617f	293	if (ret < 0)
f140b0cc	294	return ret;
f140b0cc	295	} else {
c0ad88a9 PZ	296	drm_connector_helper_add(connector,
	297	&imx_pd_connector_helper_funcs);
	298	drm_connector_init(drm, connector, &imx_pd_connector_funcs,
	299	DRM_MODE_CONNECTOR_DPI);
	300
5145fe5b	301	drm_connector_attach_encoder(connector, encoder);
f140b0cc	302	}
19022aaa	303
19022aaa SH	304	return 0;
	305	}
	306
495590c6 PZ	307	static const struct component_ops imx_pd_ops = {
	308	.bind = imx_pd_bind,
	309	};
	310
	311	static int imx_pd_probe(struct platform_device *pdev)
	312	{
	313	struct device *dev = &pdev->dev;
17b5001b	314	struct device_node *np = dev->of_node;
19022aaa SH	315	const u8 *edidp;
19022aaa SH	316	struct imx_parallel_display *imxpd;
acbb7f14	317	int edid_len;
19022aaa	318	int ret;
032003c5	319	u32 bus_format = 0;
19022aaa SH	320	const char *fmt;
19022aaa SH	321
495590c6 PZ	322	imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
	323	if (!imxpd)
	324	return -ENOMEM;
19022aaa	325
853fe4fc MF	326	/* port@1 is the output port */
	327	ret = drm_of_find_panel_or_bridge(np, 1, 0, &imxpd->panel,
	328	&imxpd->next_bridge);
	329	if (ret && ret != -ENODEV)
	330	return ret;
19022aaa	331
acbb7f14	332	edidp = of_get_property(np, "edid", &edid_len);
19022aaa	333	if (edidp)
acbb7f14	334	imxpd->edid = devm_kmemdup(dev, edidp, edid_len, GFP_KERNEL);
19022aaa SH	335
	336	ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
	337	if (!ret) {
	338	if (!strcmp(fmt, "rgb24"))
032003c5	339	bus_format = MEDIA_BUS_FMT_RGB888_1X24;
19022aaa	340	else if (!strcmp(fmt, "rgb565"))
032003c5	341	bus_format = MEDIA_BUS_FMT_RGB565_1X16;
7d0a66c0	342	else if (!strcmp(fmt, "bgr666"))
032003c5	343	bus_format = MEDIA_BUS_FMT_RGB666_1X18;
9e74d292	344	else if (!strcmp(fmt, "lvds666"))
032003c5	345	bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
19022aaa	346	}
49f98bc4	347	imxpd->bus_format = bus_format;
19022aaa	348
17b5001b	349	imxpd->dev = dev;
19022aaa	350
ba807c94 PZ	351	platform_set_drvdata(pdev, imxpd);
ba807c94 PZ	352
495590c6	353	return component_add(dev, &imx_pd_ops);
17b5001b RK	354	}
	355
	356	static int imx_pd_remove(struct platform_device *pdev)
	357	{
	358	component_del(&pdev->dev, &imx_pd_ops);
dcbc9eb1	359
19022aaa SH	360	return 0;
	361	}
	362
	363	static const struct of_device_id imx_pd_dt_ids[] = {
	364	{ .compatible = "fsl,imx-parallel-display", },
	365	{ /* sentinel */ }
	366	};
fa45f2c7	367	MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
19022aaa SH	368
	369	static struct platform_driver imx_pd_driver = {
	370	.probe = imx_pd_probe,
99c28f10	371	.remove = imx_pd_remove,
19022aaa SH	372	.driver = {
	373	.of_match_table = imx_pd_dt_ids,
	374	.name = "imx-parallel-display",
19022aaa SH	375	},
	376	};
	377
	378	module_platform_driver(imx_pd_driver);
	379
	380	MODULE_DESCRIPTION("i.MX parallel display driver");
	381	MODULE_AUTHOR("Sascha Hauer, Pengutronix");
	382	MODULE_LICENSE("GPL");
b2da05ff	383	MODULE_ALIAS("platform:imx-parallel-display");