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

/*
 * i.MX drm driver - LVDS display bridge
 *
 * 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/module.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <video/of_videomode.h>
#include <linux/regmap.h>
#include <linux/videodev2.h>

#include "imx-drm.h"

#define DRIVER_NAME "imx-ldb"

#define LDB_CH0_MODE_EN_TO_DI0		(1 << 0)
#define LDB_CH0_MODE_EN_TO_DI1		(3 << 0)
#define LDB_CH0_MODE_EN_MASK		(3 << 0)
#define LDB_CH1_MODE_EN_TO_DI0		(1 << 2)
#define LDB_CH1_MODE_EN_TO_DI1		(3 << 2)
#define LDB_CH1_MODE_EN_MASK		(3 << 2)
#define LDB_SPLIT_MODE_EN		(1 << 4)
#define LDB_DATA_WIDTH_CH0_24		(1 << 5)
#define LDB_BIT_MAP_CH0_JEIDA		(1 << 6)
#define LDB_DATA_WIDTH_CH1_24		(1 << 7)
#define LDB_BIT_MAP_CH1_JEIDA		(1 << 8)
#define LDB_DI0_VS_POL_ACT_LOW		(1 << 9)
#define LDB_DI1_VS_POL_ACT_LOW		(1 << 10)
#define LDB_BGREF_RMODE_INT		(1 << 15)

#define con_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, connector)
#define enc_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, encoder)

struct imx_ldb;

struct imx_ldb_channel {
	struct imx_ldb *ldb;
	struct drm_connector connector;
	struct drm_encoder encoder;
	struct device_node *child;
	int chno;
	void *edid;
	int edid_len;
	struct drm_display_mode mode;
	int mode_valid;
};

struct bus_mux {
	int reg;
	int shift;
	int mask;
};

struct imx_ldb {
	struct regmap *regmap;
	struct device *dev;
	struct imx_ldb_channel channel[2];
	struct clk *clk[2]; /* our own clock */
	struct clk *clk_sel[4]; /* parent of display clock */
	struct clk *clk_pll[2]; /* upstream clock we can adjust */
	u32 ldb_ctrl;
	const struct bus_mux *lvds_mux;
};

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

static int imx_ldb_connector_get_modes(struct drm_connector *connector)
{
	struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
	int num_modes = 0;

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

	if (imx_ldb_ch->mode_valid) {
		struct drm_display_mode *mode;

		mode = drm_mode_create(connector->dev);
		drm_mode_copy(mode, &imx_ldb_ch->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_ldb_connector_best_encoder(
		struct drm_connector *connector)
{
	struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);

	return &imx_ldb_ch->encoder;
}

static void imx_ldb_encoder_dpms(struct drm_encoder *encoder, int mode)
{
}

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

static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno,
		unsigned long serial_clk, unsigned long di_clk)
{
	int ret;

	dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__,
			clk_get_rate(ldb->clk_pll[chno]), serial_clk);
	clk_set_rate(ldb->clk_pll[chno], serial_clk);

	dev_dbg(ldb->dev, "%s after: %ld\n", __func__,
			clk_get_rate(ldb->clk_pll[chno]));

	dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__,
			clk_get_rate(ldb->clk[chno]),
			(long int)di_clk);
	clk_set_rate(ldb->clk[chno], di_clk);

	dev_dbg(ldb->dev, "%s after: %ld\n", __func__,
			clk_get_rate(ldb->clk[chno]));

	/* set display clock mux to LDB input clock */
	ret = clk_set_parent(ldb->clk_sel[mux], ldb->clk[chno]);
	if (ret)
		dev_err(ldb->dev, "unable to set di%d parent clock to ldb_di%d\n", mux, chno);
}

static void imx_ldb_encoder_prepare(struct drm_encoder *encoder)
{
	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
	struct imx_ldb *ldb = imx_ldb_ch->ldb;
	struct drm_display_mode *mode = &encoder->crtc->mode;
	u32 pixel_fmt;
	unsigned long serial_clk;
	unsigned long di_clk = mode->clock * 1000;
	int mux = imx_drm_encoder_get_mux_id(encoder);

	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
		/* dual channel LVDS mode */
		serial_clk = 3500UL * mode->clock;
		imx_ldb_set_clock(ldb, mux, 0, serial_clk, di_clk);
		imx_ldb_set_clock(ldb, mux, 1, serial_clk, di_clk);
	} else {
		serial_clk = 7000UL * mode->clock;
		imx_ldb_set_clock(ldb, mux, imx_ldb_ch->chno, serial_clk, di_clk);
	}

	switch (imx_ldb_ch->chno) {
	case 0:
		pixel_fmt = (ldb->ldb_ctrl & LDB_DATA_WIDTH_CH0_24) ?
			V4L2_PIX_FMT_RGB24 : V4L2_PIX_FMT_BGR666;
		break;
	case 1:
		pixel_fmt = (ldb->ldb_ctrl & LDB_DATA_WIDTH_CH1_24) ?
			V4L2_PIX_FMT_RGB24 : V4L2_PIX_FMT_BGR666;
		break;
	default:
		dev_err(ldb->dev, "unable to config di%d panel format\n",
			imx_ldb_ch->chno);
		pixel_fmt = V4L2_PIX_FMT_RGB24;
	}

	imx_drm_panel_format(encoder, pixel_fmt);
}

static void imx_ldb_encoder_commit(struct drm_encoder *encoder)
{
	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
	struct imx_ldb *ldb = imx_ldb_ch->ldb;
	int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
	int mux = imx_drm_encoder_get_mux_id(encoder);

	if (dual) {
		clk_prepare_enable(ldb->clk[0]);
		clk_prepare_enable(ldb->clk[1]);
	}

	if (imx_ldb_ch == &ldb->channel[0] || dual) {
		ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
		if (mux == 0 || ldb->lvds_mux)
			ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI0;
		else if (mux == 1)
			ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI1;
	}
	if (imx_ldb_ch == &ldb->channel[1] || dual) {
		ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
		if (mux == 1 || ldb->lvds_mux)
			ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI1;
		else if (mux == 0)
			ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI0;
	}

	if (ldb->lvds_mux) {
		const struct bus_mux *lvds_mux = NULL;

		if (imx_ldb_ch == &ldb->channel[0])
			lvds_mux = &ldb->lvds_mux[0];
		else if (imx_ldb_ch == &ldb->channel[1])
			lvds_mux = &ldb->lvds_mux[1];

		regmap_update_bits(ldb->regmap, lvds_mux->reg, lvds_mux->mask,
				   mux << lvds_mux->shift);
	}

	regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
}

static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder,
			 struct drm_display_mode *mode,
			 struct drm_display_mode *adjusted_mode)
{
	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
	struct imx_ldb *ldb = imx_ldb_ch->ldb;
	int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;

	if (mode->clock > 170000) {
		dev_warn(ldb->dev,
			 "%s: mode exceeds 170 MHz pixel clock\n", __func__);
	}
	if (mode->clock > 85000 && !dual) {
		dev_warn(ldb->dev,
			 "%s: mode exceeds 85 MHz pixel clock\n", __func__);
	}

	/* FIXME - assumes straight connections DI0 --> CH0, DI1 --> CH1 */
	if (imx_ldb_ch == &ldb->channel[0]) {
		if (mode->flags & DRM_MODE_FLAG_NVSYNC)
			ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW;
		else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
			ldb->ldb_ctrl &= ~LDB_DI0_VS_POL_ACT_LOW;
	}
	if (imx_ldb_ch == &ldb->channel[1]) {
		if (mode->flags & DRM_MODE_FLAG_NVSYNC)
			ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW;
		else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
			ldb->ldb_ctrl &= ~LDB_DI1_VS_POL_ACT_LOW;
	}
}

static void imx_ldb_encoder_disable(struct drm_encoder *encoder)
{
	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
	struct imx_ldb *ldb = imx_ldb_ch->ldb;

	/*
	 * imx_ldb_encoder_disable is called by
	 * drm_helper_disable_unused_functions without
	 * the encoder being enabled before.
	 */
	if (imx_ldb_ch == &ldb->channel[0] &&
	    (ldb->ldb_ctrl & LDB_CH0_MODE_EN_MASK) == 0)
		return;
	else if (imx_ldb_ch == &ldb->channel[1] &&
		 (ldb->ldb_ctrl & LDB_CH1_MODE_EN_MASK) == 0)
		return;

	if (imx_ldb_ch == &ldb->channel[0])
		ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
	else if (imx_ldb_ch == &ldb->channel[1])
		ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;

	regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);

	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
		clk_disable_unprepare(ldb->clk[0]);
		clk_disable_unprepare(ldb->clk[1]);
	}
}

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

static struct drm_connector_helper_funcs imx_ldb_connector_helper_funcs = {
	.get_modes = imx_ldb_connector_get_modes,
	.best_encoder = imx_ldb_connector_best_encoder,
	.mode_valid = imx_drm_connector_mode_valid,
};

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

static struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = {
	.dpms = imx_ldb_encoder_dpms,
	.mode_fixup = imx_ldb_encoder_mode_fixup,
	.prepare = imx_ldb_encoder_prepare,
	.commit = imx_ldb_encoder_commit,
	.mode_set = imx_ldb_encoder_mode_set,
	.disable = imx_ldb_encoder_disable,
};

static int imx_ldb_get_clk(struct imx_ldb *ldb, int chno)
{
	char clkname[16];

	sprintf(clkname, "di%d", chno);
	ldb->clk[chno] = devm_clk_get(ldb->dev, clkname);
	if (IS_ERR(ldb->clk[chno]))
		return PTR_ERR(ldb->clk[chno]);

	sprintf(clkname, "di%d_pll", chno);
	ldb->clk_pll[chno] = devm_clk_get(ldb->dev, clkname);

	return PTR_ERR_OR_ZERO(ldb->clk_pll[chno]);
}

static int imx_ldb_register(struct drm_device *drm,
	struct imx_ldb_channel *imx_ldb_ch)
{
	struct imx_ldb *ldb = imx_ldb_ch->ldb;
	int ret;

	ret = imx_drm_encoder_parse_of(drm, &imx_ldb_ch->encoder,
				       imx_ldb_ch->child);
	if (ret)
		return ret;

	ret = imx_ldb_get_clk(ldb, imx_ldb_ch->chno);
	if (ret)
		return ret;

	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
		ret = imx_ldb_get_clk(ldb, 1);
		if (ret)
			return ret;
	}

	drm_encoder_helper_add(&imx_ldb_ch->encoder,
			&imx_ldb_encoder_helper_funcs);
	drm_encoder_init(drm, &imx_ldb_ch->encoder, &imx_ldb_encoder_funcs,
			 DRM_MODE_ENCODER_LVDS);

	drm_connector_helper_add(&imx_ldb_ch->connector,
			&imx_ldb_connector_helper_funcs);
	drm_connector_init(drm, &imx_ldb_ch->connector,
			   &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS);

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

	return 0;
}

enum {
	LVDS_BIT_MAP_SPWG,
	LVDS_BIT_MAP_JEIDA
};

static const char * const imx_ldb_bit_mappings[] = {
	[LVDS_BIT_MAP_SPWG]  = "spwg",
	[LVDS_BIT_MAP_JEIDA] = "jeida",
};

static const int of_get_data_mapping(struct device_node *np)
{
	const char *bm;
	int ret, i;

	ret = of_property_read_string(np, "fsl,data-mapping", &bm);
	if (ret < 0)
		return ret;

	for (i = 0; i < ARRAY_SIZE(imx_ldb_bit_mappings); i++)
		if (!strcasecmp(bm, imx_ldb_bit_mappings[i]))
			return i;

	return -EINVAL;
}

static struct bus_mux imx6q_lvds_mux[2] = {
	{
		.reg = IOMUXC_GPR3,
		.shift = 6,
		.mask = IMX6Q_GPR3_LVDS0_MUX_CTL_MASK,
	}, {
		.reg = IOMUXC_GPR3,
		.shift = 8,
		.mask = IMX6Q_GPR3_LVDS1_MUX_CTL_MASK,
	}
};

/*
 * For a device declaring compatible = "fsl,imx6q-ldb", "fsl,imx53-ldb",
 * of_match_device will walk through this list and take the first entry
 * matching any of its compatible values. Therefore, the more generic
 * entries (in this case fsl,imx53-ldb) need to be ordered last.
 */
static const struct of_device_id imx_ldb_dt_ids[] = {
	{ .compatible = "fsl,imx6q-ldb", .data = imx6q_lvds_mux, },
	{ .compatible = "fsl,imx53-ldb", .data = NULL, },
	{ }
};
MODULE_DEVICE_TABLE(of, imx_ldb_dt_ids);

static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
{
	struct drm_device *drm = data;
	struct device_node *np = dev->of_node;
	const struct of_device_id *of_id =
			of_match_device(imx_ldb_dt_ids, dev);
	struct device_node *child;
	const u8 *edidp;
	struct imx_ldb *imx_ldb;
	int datawidth;
	int mapping;
	int dual;
	int ret;
	int i;

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

	imx_ldb->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
	if (IS_ERR(imx_ldb->regmap)) {
		dev_err(dev, "failed to get parent regmap\n");
		return PTR_ERR(imx_ldb->regmap);
	}

	imx_ldb->dev = dev;

	if (of_id)
		imx_ldb->lvds_mux = of_id->data;

	dual = of_property_read_bool(np, "fsl,dual-channel");
	if (dual)
		imx_ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN;

	/*
	 * There are three different possible clock mux configurations:
	 * i.MX53:  ipu1_di0_sel, ipu1_di1_sel
	 * i.MX6q:  ipu1_di0_sel, ipu1_di1_sel, ipu2_di0_sel, ipu2_di1_sel
	 * i.MX6dl: ipu1_di0_sel, ipu1_di1_sel, lcdif_sel
	 * Map them all to di0_sel...di3_sel.
	 */
	for (i = 0; i < 4; i++) {
		char clkname[16];

		sprintf(clkname, "di%d_sel", i);
		imx_ldb->clk_sel[i] = devm_clk_get(imx_ldb->dev, clkname);
		if (IS_ERR(imx_ldb->clk_sel[i])) {
			ret = PTR_ERR(imx_ldb->clk_sel[i]);
			imx_ldb->clk_sel[i] = NULL;
			break;
		}
	}
	if (i == 0)
		return ret;

	for_each_child_of_node(np, child) {
		struct imx_ldb_channel *channel;

		ret = of_property_read_u32(child, "reg", &i);
		if (ret || i < 0 || i > 1)
			return -EINVAL;

		if (dual && i > 0) {
			dev_warn(dev, "dual-channel mode, ignoring second output\n");
			continue;
		}

		if (!of_device_is_available(child))
			continue;

		channel = &imx_ldb->channel[i];
		channel->ldb = imx_ldb;
		channel->chno = i;
		channel->child = child;

		edidp = of_get_property(child, "edid", &channel->edid_len);
		if (edidp) {
			channel->edid = kmemdup(edidp, channel->edid_len,
						GFP_KERNEL);
		} else {
			ret = of_get_drm_display_mode(child, &channel->mode, 0);
			if (!ret)
				channel->mode_valid = 1;
		}

		ret = of_property_read_u32(child, "fsl,data-width", &datawidth);
		if (ret)
			datawidth = 0;
		else if (datawidth != 18 && datawidth != 24)
			return -EINVAL;

		mapping = of_get_data_mapping(child);
		switch (mapping) {
		case LVDS_BIT_MAP_SPWG:
			if (datawidth == 24) {
				if (i == 0 || dual)
					imx_ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24;
				if (i == 1 || dual)
					imx_ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24;
			}
			break;
		case LVDS_BIT_MAP_JEIDA:
			if (datawidth == 18) {
				dev_err(dev, "JEIDA standard only supported in 24 bit\n");
				return -EINVAL;
			}
			if (i == 0 || dual)
				imx_ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 | LDB_BIT_MAP_CH0_JEIDA;
			if (i == 1 || dual)
				imx_ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 | LDB_BIT_MAP_CH1_JEIDA;
			break;
		default:
			dev_err(dev, "data mapping not specified or invalid\n");
			return -EINVAL;
		}

		ret = imx_ldb_register(drm, channel);
		if (ret)
			return ret;
	}

	dev_set_drvdata(dev, imx_ldb);

	return 0;
}

static void imx_ldb_unbind(struct device *dev, struct device *master,
	void *data)
{
	struct imx_ldb *imx_ldb = dev_get_drvdata(dev);
	int i;

	for (i = 0; i < 2; i++) {
		struct imx_ldb_channel *channel = &imx_ldb->channel[i];

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

static const struct component_ops imx_ldb_ops = {
	.bind	= imx_ldb_bind,
	.unbind	= imx_ldb_unbind,
};

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

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

static struct platform_driver imx_ldb_driver = {
	.probe		= imx_ldb_probe,
	.remove		= imx_ldb_remove,
	.driver		= {
		.of_match_table = imx_ldb_dt_ids,
		.name	= DRIVER_NAME,
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(imx_ldb_driver);

MODULE_DESCRIPTION("i.MX LVDS driver");
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRIVER_NAME);
Commit	Line	Data
ac4c1a9b SH	1	/*
	2	* i.MX drm driver - LVDS display bridge
	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
	21	#include <linux/module.h>
	22	#include <linux/clk.h>
17b5001b	23	#include <linux/component.h>
ac4c1a9b SH	24	#include <drm/drmP.h>
	25	#include <drm/drm_fb_helper.h>
	26	#include <drm/drm_crtc_helper.h>
	27	#include <linux/mfd/syscon.h>
	28	#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
	29	#include <linux/of_address.h>
	30	#include <linux/of_device.h>
	31	#include <video/of_videomode.h>
	32	#include <linux/regmap.h>
	33	#include <linux/videodev2.h>
	34
	35	#include "imx-drm.h"
	36
	37	#define DRIVER_NAME "imx-ldb"
	38
	39	#define LDB_CH0_MODE_EN_TO_DI0 (1 << 0)
	40	#define LDB_CH0_MODE_EN_TO_DI1 (3 << 0)
	41	#define LDB_CH0_MODE_EN_MASK (3 << 0)
	42	#define LDB_CH1_MODE_EN_TO_DI0 (1 << 2)
	43	#define LDB_CH1_MODE_EN_TO_DI1 (3 << 2)
	44	#define LDB_CH1_MODE_EN_MASK (3 << 2)
	45	#define LDB_SPLIT_MODE_EN (1 << 4)
	46	#define LDB_DATA_WIDTH_CH0_24 (1 << 5)
	47	#define LDB_BIT_MAP_CH0_JEIDA (1 << 6)
	48	#define LDB_DATA_WIDTH_CH1_24 (1 << 7)
	49	#define LDB_BIT_MAP_CH1_JEIDA (1 << 8)
	50	#define LDB_DI0_VS_POL_ACT_LOW (1 << 9)
	51	#define LDB_DI1_VS_POL_ACT_LOW (1 << 10)
	52	#define LDB_BGREF_RMODE_INT (1 << 15)
	53
	54	#define con_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, connector)
	55	#define enc_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, encoder)
	56
	57	struct imx_ldb;
	58
	59	struct imx_ldb_channel {
	60	struct imx_ldb *ldb;
	61	struct drm_connector connector;
ac4c1a9b	62	struct drm_encoder encoder;
1b3f7675	63	struct device_node *child;
ac4c1a9b SH	64	int chno;
	65	void *edid;
	66	int edid_len;
	67	struct drm_display_mode mode;
	68	int mode_valid;
	69	};
	70
	71	struct bus_mux {
	72	int reg;
	73	int shift;
	74	int mask;
	75	};
	76
	77	struct imx_ldb {
	78	struct regmap *regmap;
	79	struct device *dev;
	80	struct imx_ldb_channel channel[2];
	81	struct clk clk[2]; / our own clock */
	82	struct clk clk_sel[4]; / parent of display clock */
	83	struct clk clk_pll[2]; / upstream clock we can adjust */
	84	u32 ldb_ctrl;
	85	const struct bus_mux *lvds_mux;
	86	};
	87
	88	static enum drm_connector_status imx_ldb_connector_detect(
	89	struct drm_connector *connector, bool force)
	90	{
	91	return connector_status_connected;
	92	}
	93
ac4c1a9b SH	94	static int imx_ldb_connector_get_modes(struct drm_connector *connector)
	95	{
	96	struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
	97	int num_modes = 0;
	98
	99	if (imx_ldb_ch->edid) {
	100	drm_mode_connector_update_edid_property(connector,
	101	imx_ldb_ch->edid);
	102	num_modes = drm_add_edid_modes(connector, imx_ldb_ch->edid);
	103	}
	104
	105	if (imx_ldb_ch->mode_valid) {
	106	struct drm_display_mode *mode;
	107
	108	mode = drm_mode_create(connector->dev);
	109	drm_mode_copy(mode, &imx_ldb_ch->mode);
	110	mode->type \|= DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED;
	111	drm_mode_probed_add(connector, mode);
	112	num_modes++;
	113	}
	114
	115	return num_modes;
	116	}
	117
ac4c1a9b SH	118	static struct drm_encoder *imx_ldb_connector_best_encoder(
	119	struct drm_connector *connector)
	120	{
	121	struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
	122
	123	return &imx_ldb_ch->encoder;
	124	}
	125
	126	static void imx_ldb_encoder_dpms(struct drm_encoder *encoder, int mode)
	127	{
	128	}
	129
	130	static bool imx_ldb_encoder_mode_fixup(struct drm_encoder *encoder,
	131	const struct drm_display_mode *mode,
	132	struct drm_display_mode *adjusted_mode)
	133	{
	134	return true;
	135	}
	136
	137	static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno,
	138	unsigned long serial_clk, unsigned long di_clk)
	139	{
	140	int ret;
	141
	142	dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__,
	143	clk_get_rate(ldb->clk_pll[chno]), serial_clk);
	144	clk_set_rate(ldb->clk_pll[chno], serial_clk);
	145
	146	dev_dbg(ldb->dev, "%s after: %ld\n", __func__,
	147	clk_get_rate(ldb->clk_pll[chno]));
	148
	149	dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__,
	150	clk_get_rate(ldb->clk[chno]),
	151	(long int)di_clk);
	152	clk_set_rate(ldb->clk[chno], di_clk);
	153
	154	dev_dbg(ldb->dev, "%s after: %ld\n", __func__,
	155	clk_get_rate(ldb->clk[chno]));
	156
	157	/* set display clock mux to LDB input clock */
	158	ret = clk_set_parent(ldb->clk_sel[mux], ldb->clk[chno]);
49f4a9c8	159	if (ret)
ac4c1a9b	160	dev_err(ldb->dev, "unable to set di%d parent clock to ldb_di%d\n", mux, chno);
ac4c1a9b SH	161	}
	162
	163	static void imx_ldb_encoder_prepare(struct drm_encoder *encoder)
	164	{
	165	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
	166	struct imx_ldb *ldb = imx_ldb_ch->ldb;
	167	struct drm_display_mode *mode = &encoder->crtc->mode;
000d73fc	168	u32 pixel_fmt;
ac4c1a9b SH	169	unsigned long serial_clk;
ac4c1a9b SH	170	unsigned long di_clk = mode->clock * 1000;
e76171b0	171	int mux = imx_drm_encoder_get_mux_id(encoder);
ac4c1a9b SH	172
	173	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
	174	/* dual channel LVDS mode */
	175	serial_clk = 3500UL * mode->clock;
	176	imx_ldb_set_clock(ldb, mux, 0, serial_clk, di_clk);
	177	imx_ldb_set_clock(ldb, mux, 1, serial_clk, di_clk);
	178	} else {
	179	serial_clk = 7000UL * mode->clock;
	180	imx_ldb_set_clock(ldb, mux, imx_ldb_ch->chno, serial_clk, di_clk);
	181	}
	182
000d73fc MN	183	switch (imx_ldb_ch->chno) {
	184	case 0:
	185	pixel_fmt = (ldb->ldb_ctrl & LDB_DATA_WIDTH_CH0_24) ?
	186	V4L2_PIX_FMT_RGB24 : V4L2_PIX_FMT_BGR666;
	187	break;
	188	case 1:
	189	pixel_fmt = (ldb->ldb_ctrl & LDB_DATA_WIDTH_CH1_24) ?
	190	V4L2_PIX_FMT_RGB24 : V4L2_PIX_FMT_BGR666;
	191	break;
	192	default:
	193	dev_err(ldb->dev, "unable to config di%d panel format\n",
	194	imx_ldb_ch->chno);
	195	pixel_fmt = V4L2_PIX_FMT_RGB24;
	196	}
	197
f2d66aad	198	imx_drm_panel_format(encoder, pixel_fmt);
ac4c1a9b SH	199	}
	200
	201	static void imx_ldb_encoder_commit(struct drm_encoder *encoder)
	202	{
	203	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
	204	struct imx_ldb *ldb = imx_ldb_ch->ldb;
	205	int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
e76171b0	206	int mux = imx_drm_encoder_get_mux_id(encoder);
ac4c1a9b SH	207
	208	if (dual) {
	209	clk_prepare_enable(ldb->clk[0]);
	210	clk_prepare_enable(ldb->clk[1]);
	211	}
	212
	213	if (imx_ldb_ch == &ldb->channel[0] \|\| dual) {
	214	ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
	215	if (mux == 0 \|\| ldb->lvds_mux)
	216	ldb->ldb_ctrl \|= LDB_CH0_MODE_EN_TO_DI0;
	217	else if (mux == 1)
	218	ldb->ldb_ctrl \|= LDB_CH0_MODE_EN_TO_DI1;
	219	}
	220	if (imx_ldb_ch == &ldb->channel[1] \|\| dual) {
	221	ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
	222	if (mux == 1 \|\| ldb->lvds_mux)
	223	ldb->ldb_ctrl \|= LDB_CH1_MODE_EN_TO_DI1;
	224	else if (mux == 0)
	225	ldb->ldb_ctrl \|= LDB_CH1_MODE_EN_TO_DI0;
	226	}
	227
	228	if (ldb->lvds_mux) {
	229	const struct bus_mux *lvds_mux = NULL;
	230
	231	if (imx_ldb_ch == &ldb->channel[0])
	232	lvds_mux = &ldb->lvds_mux[0];
	233	else if (imx_ldb_ch == &ldb->channel[1])
	234	lvds_mux = &ldb->lvds_mux[1];
	235
	236	regmap_update_bits(ldb->regmap, lvds_mux->reg, lvds_mux->mask,
	237	mux << lvds_mux->shift);
	238	}
	239
	240	regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
	241	}
	242
	243	static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder,
	244	struct drm_display_mode *mode,
	245	struct drm_display_mode *adjusted_mode)
	246	{
	247	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
	248	struct imx_ldb *ldb = imx_ldb_ch->ldb;
	249	int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
	250
	251	if (mode->clock > 170000) {
	252	dev_warn(ldb->dev,
	253	"%s: mode exceeds 170 MHz pixel clock\n", __func__);
	254	}
	255	if (mode->clock > 85000 && !dual) {
	256	dev_warn(ldb->dev,
	257	"%s: mode exceeds 85 MHz pixel clock\n", __func__);
	258	}
	259
	260	/* FIXME - assumes straight connections DI0 --> CH0, DI1 --> CH1 */
	261	if (imx_ldb_ch == &ldb->channel[0]) {
	262	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
	263	ldb->ldb_ctrl \|= LDB_DI0_VS_POL_ACT_LOW;
	264	else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
	265	ldb->ldb_ctrl &= ~LDB_DI0_VS_POL_ACT_LOW;
	266	}
	267	if (imx_ldb_ch == &ldb->channel[1]) {
	268	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
	269	ldb->ldb_ctrl \|= LDB_DI1_VS_POL_ACT_LOW;
	270	else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
271	ldb->ldb_ctrl &= ~LDB_DI1_VS_POL_ACT_LOW;
272	}
273	}
274
275	static void imx_ldb_encoder_disable(struct drm_encoder *encoder)
276	{
277	struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
278	struct imx_ldb *ldb = imx_ldb_ch->ldb;
279
280	/*
281	* imx_ldb_encoder_disable is called by
282	* drm_helper_disable_unused_functions without
283	* the encoder being enabled before.
284	*/
285	if (imx_ldb_ch == &ldb->channel[0] &&
286	(ldb->ldb_ctrl & LDB_CH0_MODE_EN_MASK) == 0)
287	return;
288	else if (imx_ldb_ch == &ldb->channel[1] &&
289	(ldb->ldb_ctrl & LDB_CH1_MODE_EN_MASK) == 0)
290	return;
291
292	if (imx_ldb_ch == &ldb->channel[0])
293	ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
294	else if (imx_ldb_ch == &ldb->channel[1])
295	ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
296
297	regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
298
299	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
300	clk_disable_unprepare(ldb->clk[0]);
301	clk_disable_unprepare(ldb->clk[1]);
302	}
303	}
304
ac4c1a9b SH	305	static struct drm_connector_funcs imx_ldb_connector_funcs = {
	306	.dpms = drm_helper_connector_dpms,
	307	.fill_modes = drm_helper_probe_single_connector_modes,
	308	.detect = imx_ldb_connector_detect,
1b3f7675	309	.destroy = imx_drm_connector_destroy,
ac4c1a9b SH	310	};
	311
	312	static struct drm_connector_helper_funcs imx_ldb_connector_helper_funcs = {
	313	.get_modes = imx_ldb_connector_get_modes,
	314	.best_encoder = imx_ldb_connector_best_encoder,
baa68c4b	315	.mode_valid = imx_drm_connector_mode_valid,
ac4c1a9b SH	316	};
	317
	318	static struct drm_encoder_funcs imx_ldb_encoder_funcs = {
1b3f7675	319	.destroy = imx_drm_encoder_destroy,
ac4c1a9b SH	320	};
	321
	322	static struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = {
	323	.dpms = imx_ldb_encoder_dpms,
	324	.mode_fixup = imx_ldb_encoder_mode_fixup,
	325	.prepare = imx_ldb_encoder_prepare,
	326	.commit = imx_ldb_encoder_commit,
	327	.mode_set = imx_ldb_encoder_mode_set,
	328	.disable = imx_ldb_encoder_disable,
	329	};
	330
	331	static int imx_ldb_get_clk(struct imx_ldb *ldb, int chno)
	332	{
	333	char clkname[16];
	334
	335	sprintf(clkname, "di%d", chno);
	336	ldb->clk[chno] = devm_clk_get(ldb->dev, clkname);
	337	if (IS_ERR(ldb->clk[chno]))
	338	return PTR_ERR(ldb->clk[chno]);
	339
	340	sprintf(clkname, "di%d_pll", chno);
	341	ldb->clk_pll[chno] = devm_clk_get(ldb->dev, clkname);
ac4c1a9b	342
1f933fa8	343	return PTR_ERR_OR_ZERO(ldb->clk_pll[chno]);
ac4c1a9b SH	344	}
ac4c1a9b SH	345
1b3f7675 RK	346	static int imx_ldb_register(struct drm_device *drm,
1b3f7675 RK	347	struct imx_ldb_channel *imx_ldb_ch)
ac4c1a9b	348	{
ac4c1a9b	349	struct imx_ldb *ldb = imx_ldb_ch->ldb;
1b3f7675 RK	350	int ret;
	351
	352	ret = imx_drm_encoder_parse_of(drm, &imx_ldb_ch->encoder,
	353	imx_ldb_ch->child);
	354	if (ret)
	355	return ret;
ac4c1a9b SH	356
	357	ret = imx_ldb_get_clk(ldb, imx_ldb_ch->chno);
	358	if (ret)
	359	return ret;
1b3f7675	360
ac4c1a9b	361	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
1b3f7675	362	ret = imx_ldb_get_clk(ldb, 1);
ac4c1a9b SH	363	if (ret)
	364	return ret;
	365	}
	366
ac4c1a9b SH	367	drm_encoder_helper_add(&imx_ldb_ch->encoder,
ac4c1a9b SH	368	&imx_ldb_encoder_helper_funcs);
1b3f7675 RK	369	drm_encoder_init(drm, &imx_ldb_ch->encoder, &imx_ldb_encoder_funcs,
1b3f7675 RK	370	DRM_MODE_ENCODER_LVDS);
ac4c1a9b SH	371
	372	drm_connector_helper_add(&imx_ldb_ch->connector,
	373	&imx_ldb_connector_helper_funcs);
1b3f7675 RK	374	drm_connector_init(drm, &imx_ldb_ch->connector,
1b3f7675 RK	375	&imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
ac4c1a9b SH	376
	377	drm_mode_connector_attach_encoder(&imx_ldb_ch->connector,
	378	&imx_ldb_ch->encoder);
	379
	380	return 0;
	381	}
	382
	383	enum {
	384	LVDS_BIT_MAP_SPWG,
	385	LVDS_BIT_MAP_JEIDA
	386	};
	387
5354cb64	388	static const char * const imx_ldb_bit_mappings[] = {
ac4c1a9b SH	389	[LVDS_BIT_MAP_SPWG] = "spwg",
	390	[LVDS_BIT_MAP_JEIDA] = "jeida",
	391	};
	392
d78b1406	393	static const int of_get_data_mapping(struct device_node *np)
ac4c1a9b SH	394	{
	395	const char *bm;
	396	int ret, i;
	397
	398	ret = of_property_read_string(np, "fsl,data-mapping", &bm);
	399	if (ret < 0)
	400	return ret;
	401
	402	for (i = 0; i < ARRAY_SIZE(imx_ldb_bit_mappings); i++)
	403	if (!strcasecmp(bm, imx_ldb_bit_mappings[i]))
	404	return i;
	405
	406	return -EINVAL;
	407	}
	408
	409	static struct bus_mux imx6q_lvds_mux[2] = {
	410	{
	411	.reg = IOMUXC_GPR3,
	412	.shift = 6,
	413	.mask = IMX6Q_GPR3_LVDS0_MUX_CTL_MASK,
	414	}, {
	415	.reg = IOMUXC_GPR3,
	416	.shift = 8,
	417	.mask = IMX6Q_GPR3_LVDS1_MUX_CTL_MASK,
	418	}
	419	};
	420
	421	/*
	422	* For a device declaring compatible = "fsl,imx6q-ldb", "fsl,imx53-ldb",
	423	* of_match_device will walk through this list and take the first entry
	424	* matching any of its compatible values. Therefore, the more generic
	425	* entries (in this case fsl,imx53-ldb) need to be ordered last.
	426	*/
	427	static const struct of_device_id imx_ldb_dt_ids[] = {
	428	{ .compatible = "fsl,imx6q-ldb", .data = imx6q_lvds_mux, },
	429	{ .compatible = "fsl,imx53-ldb", .data = NULL, },
	430	{ }
	431	};
	432	MODULE_DEVICE_TABLE(of, imx_ldb_dt_ids);
	433
17b5001b	434	static int imx_ldb_bind(struct device dev, struct device master, void *data)
ac4c1a9b	435	{
1b3f7675	436	struct drm_device *drm = data;
17b5001b	437	struct device_node *np = dev->of_node;
ac4c1a9b	438	const struct of_device_id *of_id =
17b5001b	439	of_match_device(imx_ldb_dt_ids, dev);
ac4c1a9b SH	440	struct device_node *child;
	441	const u8 *edidp;
	442	struct imx_ldb *imx_ldb;
	443	int datawidth;
	444	int mapping;
	445	int dual;
	446	int ret;
	447	int i;
	448
17b5001b	449	imx_ldb = devm_kzalloc(dev, sizeof(*imx_ldb), GFP_KERNEL);
ac4c1a9b SH	450	if (!imx_ldb)
	451	return -ENOMEM;
	452
	453	imx_ldb->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
	454	if (IS_ERR(imx_ldb->regmap)) {
17b5001b	455	dev_err(dev, "failed to get parent regmap\n");
ac4c1a9b SH	456	return PTR_ERR(imx_ldb->regmap);
	457	}
	458
17b5001b	459	imx_ldb->dev = dev;
ac4c1a9b SH	460
	461	if (of_id)
	462	imx_ldb->lvds_mux = of_id->data;
	463
	464	dual = of_property_read_bool(np, "fsl,dual-channel");
	465	if (dual)
	466	imx_ldb->ldb_ctrl \|= LDB_SPLIT_MODE_EN;
	467
	468	/*
4599934d	469	* There are three different possible clock mux configurations:
ac4c1a9b SH	470	* i.MX53: ipu1_di0_sel, ipu1_di1_sel
	471	* i.MX6q: ipu1_di0_sel, ipu1_di1_sel, ipu2_di0_sel, ipu2_di1_sel
	472	* i.MX6dl: ipu1_di0_sel, ipu1_di1_sel, lcdif_sel
	473	* Map them all to di0_sel...di3_sel.
	474	*/
	475	for (i = 0; i < 4; i++) {
	476	char clkname[16];
	477
	478	sprintf(clkname, "di%d_sel", i);
	479	imx_ldb->clk_sel[i] = devm_clk_get(imx_ldb->dev, clkname);
	480	if (IS_ERR(imx_ldb->clk_sel[i])) {
	481	ret = PTR_ERR(imx_ldb->clk_sel[i]);
	482	imx_ldb->clk_sel[i] = NULL;
	483	break;
	484	}
	485	}
	486	if (i == 0)
	487	return ret;
	488
	489	for_each_child_of_node(np, child) {
	490	struct imx_ldb_channel *channel;
	491
	492	ret = of_property_read_u32(child, "reg", &i);
	493	if (ret \|\| i < 0 \|\| i > 1)
	494	return -EINVAL;
	495
	496	if (dual && i > 0) {
17b5001b	497	dev_warn(dev, "dual-channel mode, ignoring second output\n");
ac4c1a9b SH	498	continue;
	499	}
	500
	501	if (!of_device_is_available(child))
	502	continue;
	503
	504	channel = &imx_ldb->channel[i];
	505	channel->ldb = imx_ldb;
	506	channel->chno = i;
1b3f7675	507	channel->child = child;
ac4c1a9b SH	508
	509	edidp = of_get_property(child, "edid", &channel->edid_len);
	510	if (edidp) {
	511	channel->edid = kmemdup(edidp, channel->edid_len,
	512	GFP_KERNEL);
	513	} else {
	514	ret = of_get_drm_display_mode(child, &channel->mode, 0);
	515	if (!ret)
	516	channel->mode_valid = 1;
	517	}
	518
	519	ret = of_property_read_u32(child, "fsl,data-width", &datawidth);
	520	if (ret)
	521	datawidth = 0;
	522	else if (datawidth != 18 && datawidth != 24)
	523	return -EINVAL;
	524
	525	mapping = of_get_data_mapping(child);
	526	switch (mapping) {
	527	case LVDS_BIT_MAP_SPWG:
	528	if (datawidth == 24) {
	529	if (i == 0 \|\| dual)
	530	imx_ldb->ldb_ctrl \|= LDB_DATA_WIDTH_CH0_24;
	531	if (i == 1 \|\| dual)
	532	imx_ldb->ldb_ctrl \|= LDB_DATA_WIDTH_CH1_24;
	533	}
	534	break;
	535	case LVDS_BIT_MAP_JEIDA:
	536	if (datawidth == 18) {
17b5001b	537	dev_err(dev, "JEIDA standard only supported in 24 bit\n");
ac4c1a9b SH	538	return -EINVAL;
	539	}
	540	if (i == 0 \|\| dual)
	541	imx_ldb->ldb_ctrl \|= LDB_DATA_WIDTH_CH0_24 \| LDB_BIT_MAP_CH0_JEIDA;
	542	if (i == 1 \|\| dual)
	543	imx_ldb->ldb_ctrl \|= LDB_DATA_WIDTH_CH1_24 \| LDB_BIT_MAP_CH1_JEIDA;
	544	break;
	545	default:
17b5001b	546	dev_err(dev, "data mapping not specified or invalid\n");
ac4c1a9b SH	547	return -EINVAL;
	548	}
	549
1b3f7675	550	ret = imx_ldb_register(drm, channel);
ac4c1a9b SH	551	if (ret)
ac4c1a9b SH	552	return ret;
ac4c1a9b SH	553	}
ac4c1a9b SH	554
17b5001b	555	dev_set_drvdata(dev, imx_ldb);
ac4c1a9b SH	556
	557	return 0;
	558	}
	559
17b5001b RK	560	static void imx_ldb_unbind(struct device dev, struct device master,
17b5001b RK	561	void *data)
ac4c1a9b	562	{
17b5001b	563	struct imx_ldb *imx_ldb = dev_get_drvdata(dev);
ac4c1a9b SH	564	int i;
	565
	566	for (i = 0; i < 2; i++) {
	567	struct imx_ldb_channel *channel = &imx_ldb->channel[i];
ac4c1a9b	568
1b3f7675 RK	569	channel->connector.funcs->destroy(&channel->connector);
1b3f7675 RK	570	channel->encoder.funcs->destroy(&channel->encoder);
ac4c1a9b	571	}
17b5001b	572	}
ac4c1a9b	573
17b5001b RK	574	static const struct component_ops imx_ldb_ops = {
	575	.bind = imx_ldb_bind,
	576	.unbind = imx_ldb_unbind,
	577	};
	578
	579	static int imx_ldb_probe(struct platform_device *pdev)
	580	{
	581	return component_add(&pdev->dev, &imx_ldb_ops);
	582	}
	583
	584	static int imx_ldb_remove(struct platform_device *pdev)
	585	{
	586	component_del(&pdev->dev, &imx_ldb_ops);
ac4c1a9b SH	587	return 0;
	588	}
	589
	590	static struct platform_driver imx_ldb_driver = {
	591	.probe = imx_ldb_probe,
	592	.remove = imx_ldb_remove,
	593	.driver = {
	594	.of_match_table = imx_ldb_dt_ids,
	595	.name = DRIVER_NAME,
	596	.owner = THIS_MODULE,
	597	},
	598	};
	599
	600	module_platform_driver(imx_ldb_driver);
	601
	602	MODULE_DESCRIPTION("i.MX LVDS driver");
	603	MODULE_AUTHOR("Sascha Hauer, Pengutronix");
	604	MODULE_LICENSE("GPL");
bc627387	605	MODULE_ALIAS("platform:" DRIVER_NAME);