[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / imx / dw_hdmi-imx.c

/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
 *
 * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now)
 *
 * 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.
 */
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/component.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include <drm/bridge/dw_hdmi.h>
#include <video/imx-ipu-v3.h>
#include <linux/regmap.h>
#include <drm/drm_of.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_encoder_slave.h>

#include "imx-drm.h"

struct imx_hdmi {
	struct device *dev;
	struct drm_encoder encoder;
	struct regmap *regmap;
};

static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = {
	{
		45250000, {
			{ 0x01e0, 0x0000 },
			{ 0x21e1, 0x0000 },
			{ 0x41e2, 0x0000 }
		},
	}, {
		92500000, {
			{ 0x0140, 0x0005 },
			{ 0x2141, 0x0005 },
			{ 0x4142, 0x0005 },
	},
	}, {
		148500000, {
			{ 0x00a0, 0x000a },
			{ 0x20a1, 0x000a },
			{ 0x40a2, 0x000a },
		},
	}, {
		~0UL, {
			{ 0x00a0, 0x000a },
			{ 0x2001, 0x000f },
			{ 0x4002, 0x000f },
		},
	}
};

static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = {
	/*      pixelclk     bpp8    bpp10   bpp12 */
	{
		54000000, { 0x091c, 0x091c, 0x06dc },
	}, {
		58400000, { 0x091c, 0x06dc, 0x06dc },
	}, {
		72000000, { 0x06dc, 0x06dc, 0x091c },
	}, {
		74250000, { 0x06dc, 0x0b5c, 0x091c },
	}, {
		118800000, { 0x091c, 0x091c, 0x06dc },
	}, {
		216000000, { 0x06dc, 0x0b5c, 0x091c },
	}, {
		~0UL, { 0x0000, 0x0000, 0x0000 },
	},
};

static const struct dw_hdmi_sym_term imx_sym_term[] = {
	/*pixelclk   symbol   term*/
	{ 148500000, 0x800d, 0x0005 },
	{ ~0UL,      0x0000, 0x0000 }
};

static int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi)
{
	struct device_node *np = hdmi->dev->of_node;

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

	return 0;
}

static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder)
{
}

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

static void dw_hdmi_imx_encoder_mode_set(struct drm_encoder *encoder,
					 struct drm_display_mode *mode,
					 struct drm_display_mode *adj_mode)
{
}

static void dw_hdmi_imx_encoder_commit(struct drm_encoder *encoder)
{
	struct imx_hdmi *hdmi = container_of(encoder, struct imx_hdmi, encoder);
	int mux = imx_drm_encoder_get_mux_id(hdmi->dev->of_node, encoder);

	regmap_update_bits(hdmi->regmap, IOMUXC_GPR3,
			   IMX6Q_GPR3_HDMI_MUX_CTL_MASK,
			   mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT);
}

static void dw_hdmi_imx_encoder_prepare(struct drm_encoder *encoder)
{
	imx_drm_panel_format(encoder, V4L2_PIX_FMT_RGB24);
}

static struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = {
	.mode_fixup = dw_hdmi_imx_encoder_mode_fixup,
	.mode_set   = dw_hdmi_imx_encoder_mode_set,
	.prepare    = dw_hdmi_imx_encoder_prepare,
	.commit     = dw_hdmi_imx_encoder_commit,
	.disable    = dw_hdmi_imx_encoder_disable,
};

static struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = {
	.destroy = drm_encoder_cleanup,
};

static enum drm_mode_status imx6q_hdmi_mode_valid(struct drm_connector *con,
						  struct drm_display_mode *mode)
{
	if (mode->clock < 13500)
		return MODE_CLOCK_LOW;
	if (mode->clock > 266000)
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}

static enum drm_mode_status imx6dl_hdmi_mode_valid(struct drm_connector *con,
						   struct drm_display_mode *mode)
{
	if (mode->clock < 13500)
		return MODE_CLOCK_LOW;
	if (mode->clock > 270000)
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}

static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = {
	.mpll_cfg   = imx_mpll_cfg,
	.cur_ctr    = imx_cur_ctr,
	.sym_term   = imx_sym_term,
	.dev_type   = IMX6Q_HDMI,
	.mode_valid = imx6q_hdmi_mode_valid,
};

static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
	.mpll_cfg = imx_mpll_cfg,
	.cur_ctr  = imx_cur_ctr,
	.sym_term = imx_sym_term,
	.dev_type = IMX6DL_HDMI,
	.mode_valid = imx6dl_hdmi_mode_valid,
};

static const struct of_device_id dw_hdmi_imx_dt_ids[] = {
	{ .compatible = "fsl,imx6q-hdmi",
	  .data = &imx6q_hdmi_drv_data
	}, {
	  .compatible = "fsl,imx6dl-hdmi",
	  .data = &imx6dl_hdmi_drv_data
	},
	{},
};
MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids);

static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
			    void *data)
{
	struct platform_device *pdev = to_platform_device(dev);
	const struct dw_hdmi_plat_data *plat_data;
	const struct of_device_id *match;
	struct drm_device *drm = data;
	struct drm_encoder *encoder;
	struct imx_hdmi *hdmi;
	struct resource *iores;
	int irq;
	int ret;

	if (!pdev->dev.of_node)
		return -ENODEV;

	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
	if (!hdmi)
		return -ENOMEM;

	match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node);
	plat_data = match->data;
	hdmi->dev = &pdev->dev;
	encoder = &hdmi->encoder;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return irq;

	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!iores)
		return -ENXIO;

	platform_set_drvdata(pdev, hdmi);

	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
	/*
	 * If we failed to find the CRTC(s) which this encoder is
	 * supposed to be connected to, it's because the CRTC has
	 * not been registered yet.  Defer probing, and hope that
	 * the required CRTC is added later.
	 */
	if (encoder->possible_crtcs == 0)
		return -EPROBE_DEFER;

	ret = dw_hdmi_imx_parse_dt(hdmi);
	if (ret < 0)
		return ret;

	drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
			 DRM_MODE_ENCODER_TMDS);

	return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
}

static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
			       void *data)
{
	return dw_hdmi_unbind(dev, master, data);
}

static const struct component_ops dw_hdmi_imx_ops = {
	.bind	= dw_hdmi_imx_bind,
	.unbind	= dw_hdmi_imx_unbind,
};

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

static int dw_hdmi_imx_remove(struct platform_device *pdev)
{
	component_del(&pdev->dev, &dw_hdmi_imx_ops);

	return 0;
}

static struct platform_driver dw_hdmi_imx_platform_driver = {
	.probe  = dw_hdmi_imx_probe,
	.remove = dw_hdmi_imx_remove,
	.driver = {
		.name = "dwhdmi-imx",
		.of_match_table = dw_hdmi_imx_dt_ids,
	},
};

module_platform_driver(dw_hdmi_imx_platform_driver);

MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:dwhdmi-imx");
Commit	Line	Data
3d1b35a3 AY	1	/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
3d1b35a3 AY	2	*
b21f4b65	3	* derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now)
3d1b35a3 AY	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*/
	9	#include <linux/module.h>
	10	#include <linux/platform_device.h>
	11	#include <linux/component.h>
	12	#include <linux/mfd/syscon.h>
	13	#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
b21f4b65	14	#include <drm/bridge/dw_hdmi.h>
3d1b35a3 AY	15	#include <video/imx-ipu-v3.h>
	16	#include <linux/regmap.h>
	17	#include <drm/drm_of.h>
	18	#include <drm/drmP.h>
	19	#include <drm/drm_crtc_helper.h>
	20	#include <drm/drm_edid.h>
	21	#include <drm/drm_encoder_slave.h>
	22
	23	#include "imx-drm.h"
3d1b35a3	24
b21f4b65	25	struct imx_hdmi {
3d1b35a3 AY	26	struct device *dev;
	27	struct drm_encoder encoder;
	28	struct regmap *regmap;
	29	};
	30
b21f4b65	31	static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = {
aaa757a0 AY	32	{
	33	45250000, {
	34	{ 0x01e0, 0x0000 },
	35	{ 0x21e1, 0x0000 },
	36	{ 0x41e2, 0x0000 }
	37	},
	38	}, {
	39	92500000, {
	40	{ 0x0140, 0x0005 },
	41	{ 0x2141, 0x0005 },
	42	{ 0x4142, 0x0005 },
	43	},
	44	}, {
	45	148500000, {
	46	{ 0x00a0, 0x000a },
	47	{ 0x20a1, 0x000a },
	48	{ 0x40a2, 0x000a },
	49	},
	50	}, {
	51	~0UL, {
	52	{ 0x00a0, 0x000a },
	53	{ 0x2001, 0x000f },
	54	{ 0x4002, 0x000f },
	55	},
	56	}
	57	};
	58
b21f4b65	59	static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = {
aaa757a0 AY	60	/* pixelclk bpp8 bpp10 bpp12 */
	61	{
	62	54000000, { 0x091c, 0x091c, 0x06dc },
	63	}, {
	64	58400000, { 0x091c, 0x06dc, 0x06dc },
	65	}, {
	66	72000000, { 0x06dc, 0x06dc, 0x091c },
	67	}, {
	68	74250000, { 0x06dc, 0x0b5c, 0x091c },
	69	}, {
	70	118800000, { 0x091c, 0x091c, 0x06dc },
	71	}, {
	72	216000000, { 0x06dc, 0x0b5c, 0x091c },
6e8958ec PZ	73	}, {
	74	~0UL, { 0x0000, 0x0000, 0x0000 },
	75	},
aaa757a0 AY	76	};
aaa757a0 AY	77
b21f4b65	78	static const struct dw_hdmi_sym_term imx_sym_term[] = {
aaa757a0 AY	79	/pixelclk symbol term/
	80	{ 148500000, 0x800d, 0x0005 },
	81	{ ~0UL, 0x0000, 0x0000 }
	82	};
	83
b21f4b65	84	static int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi)
3d1b35a3 AY	85	{
	86	struct device_node *np = hdmi->dev->of_node;
	87
	88	hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
	89	if (IS_ERR(hdmi->regmap)) {
	90	dev_err(hdmi->dev, "Unable to get gpr\n");
	91	return PTR_ERR(hdmi->regmap);
	92	}
	93
	94	return 0;
	95	}
	96
b21f4b65	97	static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder)
3d1b35a3 AY	98	{
	99	}
	100
b21f4b65 AY	101	static bool dw_hdmi_imx_encoder_mode_fixup(struct drm_encoder *encoder,
	102	const struct drm_display_mode *mode,
	103	struct drm_display_mode *adj_mode)
3d1b35a3 AY	104	{
	105	return true;
	106	}
	107
b21f4b65 AY	108	static void dw_hdmi_imx_encoder_mode_set(struct drm_encoder *encoder,
	109	struct drm_display_mode *mode,
	110	struct drm_display_mode *adj_mode)
3d1b35a3 AY	111	{
	112	}
	113
b21f4b65	114	static void dw_hdmi_imx_encoder_commit(struct drm_encoder *encoder)
3d1b35a3	115	{
b21f4b65	116	struct imx_hdmi *hdmi = container_of(encoder, struct imx_hdmi, encoder);
3d1b35a3 AY	117	int mux = imx_drm_encoder_get_mux_id(hdmi->dev->of_node, encoder);
	118
	119	regmap_update_bits(hdmi->regmap, IOMUXC_GPR3,
	120	IMX6Q_GPR3_HDMI_MUX_CTL_MASK,
	121	mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT);
	122	}
	123
b21f4b65	124	static void dw_hdmi_imx_encoder_prepare(struct drm_encoder *encoder)
3d1b35a3 AY	125	{
	126	imx_drm_panel_format(encoder, V4L2_PIX_FMT_RGB24);
	127	}
	128
b21f4b65 AY	129	static struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = {
	130	.mode_fixup = dw_hdmi_imx_encoder_mode_fixup,
	131	.mode_set = dw_hdmi_imx_encoder_mode_set,
	132	.prepare = dw_hdmi_imx_encoder_prepare,
	133	.commit = dw_hdmi_imx_encoder_commit,
	134	.disable = dw_hdmi_imx_encoder_disable,
3d1b35a3 AY	135	};
3d1b35a3 AY	136
b21f4b65	137	static struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = {
3d1b35a3 AY	138	.destroy = drm_encoder_cleanup,
	139	};
	140
081c80e8 PZ	141	static enum drm_mode_status imx6q_hdmi_mode_valid(struct drm_connector *con,
	142	struct drm_display_mode *mode)
	143	{
	144	if (mode->clock < 13500)
	145	return MODE_CLOCK_LOW;
	146	if (mode->clock > 266000)
	147	return MODE_CLOCK_HIGH;
	148
	149	return MODE_OK;
	150	}
	151
	152	static enum drm_mode_status imx6dl_hdmi_mode_valid(struct drm_connector *con,
	153	struct drm_display_mode *mode)
	154	{
	155	if (mode->clock < 13500)
	156	return MODE_CLOCK_LOW;
	157	if (mode->clock > 270000)
	158	return MODE_CLOCK_HIGH;
	159
	160	return MODE_OK;
	161	}
	162
b21f4b65	163	static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = {
081c80e8 PZ	164	.mpll_cfg = imx_mpll_cfg,
	165	.cur_ctr = imx_cur_ctr,
	166	.sym_term = imx_sym_term,
	167	.dev_type = IMX6Q_HDMI,
	168	.mode_valid = imx6q_hdmi_mode_valid,
3d1b35a3 AY	169	};
3d1b35a3 AY	170
b21f4b65	171	static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
aaa757a0 AY	172	.mpll_cfg = imx_mpll_cfg,
	173	.cur_ctr = imx_cur_ctr,
	174	.sym_term = imx_sym_term,
3d1b35a3	175	.dev_type = IMX6DL_HDMI,
081c80e8	176	.mode_valid = imx6dl_hdmi_mode_valid,
3d1b35a3 AY	177	};
3d1b35a3 AY	178
b21f4b65	179	static const struct of_device_id dw_hdmi_imx_dt_ids[] = {
3d1b35a3 AY	180	{ .compatible = "fsl,imx6q-hdmi",
	181	.data = &imx6q_hdmi_drv_data
	182	}, {
	183	.compatible = "fsl,imx6dl-hdmi",
	184	.data = &imx6dl_hdmi_drv_data
	185	},
	186	{},
	187	};
b21f4b65	188	MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids);
3d1b35a3	189
b21f4b65 AY	190	static int dw_hdmi_imx_bind(struct device dev, struct device master,
b21f4b65 AY	191	void *data)
3d1b35a3 AY	192	{
3d1b35a3 AY	193	struct platform_device *pdev = to_platform_device(dev);
b21f4b65	194	const struct dw_hdmi_plat_data *plat_data;
3d1b35a3 AY	195	const struct of_device_id *match;
	196	struct drm_device *drm = data;
	197	struct drm_encoder *encoder;
b21f4b65	198	struct imx_hdmi *hdmi;
3d1b35a3 AY	199	struct resource *iores;
	200	int irq;
	201	int ret;
	202
	203	if (!pdev->dev.of_node)
	204	return -ENODEV;
	205
	206	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
	207	if (!hdmi)
	208	return -ENOMEM;
	209
b21f4b65	210	match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node);
3d1b35a3 AY	211	plat_data = match->data;
	212	hdmi->dev = &pdev->dev;
	213	encoder = &hdmi->encoder;
	214
	215	irq = platform_get_irq(pdev, 0);
	216	if (irq < 0)
	217	return irq;
	218
	219	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	220	if (!iores)
	221	return -ENXIO;
	222
	223	platform_set_drvdata(pdev, hdmi);
	224
	225	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
	226	/*
	227	* If we failed to find the CRTC(s) which this encoder is
	228	* supposed to be connected to, it's because the CRTC has
	229	* not been registered yet. Defer probing, and hope that
	230	* the required CRTC is added later.
	231	*/
	232	if (encoder->possible_crtcs == 0)
	233	return -EPROBE_DEFER;
	234
b21f4b65	235	ret = dw_hdmi_imx_parse_dt(hdmi);
3d1b35a3 AY	236	if (ret < 0)
	237	return ret;
	238
b21f4b65 AY	239	drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
b21f4b65 AY	240	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
3d1b35a3 AY	241	DRM_MODE_ENCODER_TMDS);
3d1b35a3 AY	242
b21f4b65	243	return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
3d1b35a3 AY	244	}
3d1b35a3 AY	245
b21f4b65 AY	246	static void dw_hdmi_imx_unbind(struct device dev, struct device master,
b21f4b65 AY	247	void *data)
3d1b35a3	248	{
b21f4b65	249	return dw_hdmi_unbind(dev, master, data);
3d1b35a3 AY	250	}
3d1b35a3 AY	251
b21f4b65 AY	252	static const struct component_ops dw_hdmi_imx_ops = {
	253	.bind = dw_hdmi_imx_bind,
	254	.unbind = dw_hdmi_imx_unbind,
3d1b35a3 AY	255	};
3d1b35a3 AY	256
b21f4b65	257	static int dw_hdmi_imx_probe(struct platform_device *pdev)
3d1b35a3	258	{
b21f4b65	259	return component_add(&pdev->dev, &dw_hdmi_imx_ops);
3d1b35a3 AY	260	}
3d1b35a3 AY	261
b21f4b65	262	static int dw_hdmi_imx_remove(struct platform_device *pdev)
3d1b35a3	263	{
b21f4b65	264	component_del(&pdev->dev, &dw_hdmi_imx_ops);
3d1b35a3 AY	265
	266	return 0;
	267	}
	268
b21f4b65 AY	269	static struct platform_driver dw_hdmi_imx_platform_driver = {
	270	.probe = dw_hdmi_imx_probe,
	271	.remove = dw_hdmi_imx_remove,
3d1b35a3	272	.driver = {
b21f4b65 AY	273	.name = "dwhdmi-imx",
b21f4b65 AY	274	.of_match_table = dw_hdmi_imx_dt_ids,
3d1b35a3 AY	275	},
	276	};
	277
b21f4b65	278	module_platform_driver(dw_hdmi_imx_platform_driver);
3d1b35a3 AY	279
	280	MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
	281	MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
	282	MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension");
	283	MODULE_LICENSE("GPL");
b21f4b65	284	MODULE_ALIAS("platform:dwhdmi-imx");