1/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
2 *
3 * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now)
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>
14#include <drm/bridge/dw_hdmi.h>
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"
24
25struct imx_hdmi {
26	struct device *dev;
27	struct drm_encoder encoder;
28	struct regmap *regmap;
29};
30
31static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = {
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
59static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = {
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 },
73	}, {
74		~0UL, { 0x0000, 0x0000, 0x0000 },
75	},
76};
77
78static const struct dw_hdmi_phy_config imx_phy_config[] = {
79	/*pixelclk   symbol   term   vlev */
80	{ 148500000, 0x800d, 0x0005, 0x01ad},
81	{ ~0UL,      0x0000, 0x0000, 0x0000}
82};
83
84static int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi)
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
97static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder)
98{
99}
100
101static 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)
104{
105	return true;
106}
107
108static void dw_hdmi_imx_encoder_mode_set(struct drm_encoder *encoder,
109					 struct drm_display_mode *mode,
110					 struct drm_display_mode *adj_mode)
111{
112}
113
114static void dw_hdmi_imx_encoder_commit(struct drm_encoder *encoder)
115{
116	struct imx_hdmi *hdmi = container_of(encoder, struct imx_hdmi, encoder);
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
124static void dw_hdmi_imx_encoder_prepare(struct drm_encoder *encoder)
125{
126	imx_drm_set_bus_format(encoder, MEDIA_BUS_FMT_RGB888_1X24);
127}
128
129static 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,
135};
136
137static struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = {
138	.destroy = drm_encoder_cleanup,
139};
140
141static 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
152static 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
163static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = {
164	.mpll_cfg   = imx_mpll_cfg,
165	.cur_ctr    = imx_cur_ctr,
166	.phy_config = imx_phy_config,
167	.dev_type   = IMX6Q_HDMI,
168	.mode_valid = imx6q_hdmi_mode_valid,
169};
170
171static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
172	.mpll_cfg = imx_mpll_cfg,
173	.cur_ctr  = imx_cur_ctr,
174	.phy_config = imx_phy_config,
175	.dev_type = IMX6DL_HDMI,
176	.mode_valid = imx6dl_hdmi_mode_valid,
177};
178
179static const struct of_device_id dw_hdmi_imx_dt_ids[] = {
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};
188MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids);
189
190static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
191			    void *data)
192{
193	struct platform_device *pdev = to_platform_device(dev);
194	const struct dw_hdmi_plat_data *plat_data;
195	const struct of_device_id *match;
196	struct drm_device *drm = data;
197	struct drm_encoder *encoder;
198	struct imx_hdmi *hdmi;
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
210	match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node);
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
235	ret = dw_hdmi_imx_parse_dt(hdmi);
236	if (ret < 0)
237		return ret;
238
239	drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
240	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
241			 DRM_MODE_ENCODER_TMDS);
242
243	return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
244}
245
246static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
247			       void *data)
248{
249	return dw_hdmi_unbind(dev, master, data);
250}
251
252static const struct component_ops dw_hdmi_imx_ops = {
253	.bind	= dw_hdmi_imx_bind,
254	.unbind	= dw_hdmi_imx_unbind,
255};
256
257static int dw_hdmi_imx_probe(struct platform_device *pdev)
258{
259	return component_add(&pdev->dev, &dw_hdmi_imx_ops);
260}
261
262static int dw_hdmi_imx_remove(struct platform_device *pdev)
263{
264	component_del(&pdev->dev, &dw_hdmi_imx_ops);
265
266	return 0;
267}
268
269static struct platform_driver dw_hdmi_imx_platform_driver = {
270	.probe  = dw_hdmi_imx_probe,
271	.remove = dw_hdmi_imx_remove,
272	.driver = {
273		.name = "dwhdmi-imx",
274		.of_match_table = dw_hdmi_imx_dt_ids,
275	},
276};
277
278module_platform_driver(dw_hdmi_imx_platform_driver);
279
280MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
281MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
282MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension");
283MODULE_LICENSE("GPL");
284MODULE_ALIAS("platform:dwhdmi-imx");
285