[linux-2.6-block.git] / drivers / gpu / drm / panel / panel-samsung-s6d16d0.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * MIPI-DSI Samsung s6d16d0 panel driver. This is a 864x480
 * AMOLED panel with a command-only DSI interface.
 */

#include <drm/drm_modes.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>

#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <linux/delay.h>
#include <linux/of_device.h>
#include <linux/module.h>

struct s6d16d0 {
	struct device *dev;
	struct drm_panel panel;
	struct regulator *supply;
	struct gpio_desc *reset_gpio;
};

/*
 * The timings are not very helpful as the display is used in
 * command mode.
 */
static const struct drm_display_mode samsung_s6d16d0_mode = {
	/* HS clock, (htotal*vtotal*vrefresh)/1000 */
	.clock = 420160,
	.hdisplay = 864,
	.hsync_start = 864 + 154,
	.hsync_end = 864 + 154 + 16,
	.htotal = 864 + 154 + 16 + 32,
	.vdisplay = 480,
	.vsync_start = 480 + 1,
	.vsync_end = 480 + 1 + 1,
	.vtotal = 480 + 1 + 1 + 1,
	/*
	 * This depends on the clocking HS vs LP rate, this value
	 * is calculated as:
	 * vrefresh = (clock * 1000) / (htotal*vtotal)
	 */
	.vrefresh = 816,
	.width_mm = 84,
	.height_mm = 48,
};

static inline struct s6d16d0 *panel_to_s6d16d0(struct drm_panel *panel)
{
	return container_of(panel, struct s6d16d0, panel);
}

static int s6d16d0_unprepare(struct drm_panel *panel)
{
	struct s6d16d0 *s6 = panel_to_s6d16d0(panel);
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev);
	int ret;

	/* Enter sleep mode */
	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
	if (ret) {
		DRM_DEV_ERROR(s6->dev, "failed to enter sleep mode (%d)\n",
			      ret);
		return ret;
	}

	/* Assert RESET */
	gpiod_set_value_cansleep(s6->reset_gpio, 1);
	regulator_disable(s6->supply);

	return 0;
}

static int s6d16d0_prepare(struct drm_panel *panel)
{
	struct s6d16d0 *s6 = panel_to_s6d16d0(panel);
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev);
	int ret;

	ret = regulator_enable(s6->supply);
	if (ret) {
		DRM_DEV_ERROR(s6->dev, "failed to enable supply (%d)\n", ret);
		return ret;
	}

	/* Assert RESET */
	gpiod_set_value_cansleep(s6->reset_gpio, 1);
	udelay(10);
	/* De-assert RESET */
	gpiod_set_value_cansleep(s6->reset_gpio, 0);
	msleep(120);

	/* Enabe tearing mode: send TE (tearing effect) at VBLANK */
	ret = mipi_dsi_dcs_set_tear_on(dsi,
				       MIPI_DSI_DCS_TEAR_MODE_VBLANK);
	if (ret) {
		DRM_DEV_ERROR(s6->dev, "failed to enable vblank TE (%d)\n",
			      ret);
		return ret;
	}
	/* Exit sleep mode and power on */
	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
	if (ret) {
		DRM_DEV_ERROR(s6->dev, "failed to exit sleep mode (%d)\n",
			      ret);
		return ret;
	}

	return 0;
}

static int s6d16d0_enable(struct drm_panel *panel)
{
	struct s6d16d0 *s6 = panel_to_s6d16d0(panel);
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev);
	int ret;

	ret = mipi_dsi_dcs_set_display_on(dsi);
	if (ret) {
		DRM_DEV_ERROR(s6->dev, "failed to turn display on (%d)\n",
			      ret);
		return ret;
	}

	return 0;
}

static int s6d16d0_disable(struct drm_panel *panel)
{
	struct s6d16d0 *s6 = panel_to_s6d16d0(panel);
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev);
	int ret;

	ret = mipi_dsi_dcs_set_display_off(dsi);
	if (ret) {
		DRM_DEV_ERROR(s6->dev, "failed to turn display off (%d)\n",
			      ret);
		return ret;
	}

	return 0;
}

static int s6d16d0_get_modes(struct drm_panel *panel)
{
	struct drm_connector *connector = panel->connector;
	struct drm_display_mode *mode;

	mode = drm_mode_duplicate(panel->drm, &samsung_s6d16d0_mode);
	if (!mode) {
		DRM_ERROR("bad mode or failed to add mode\n");
		return -EINVAL;
	}
	drm_mode_set_name(mode);
	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;

	connector->display_info.width_mm = mode->width_mm;
	connector->display_info.height_mm = mode->height_mm;

	drm_mode_probed_add(connector, mode);

	return 1; /* Number of modes */
}

static const struct drm_panel_funcs s6d16d0_drm_funcs = {
	.disable = s6d16d0_disable,
	.unprepare = s6d16d0_unprepare,
	.prepare = s6d16d0_prepare,
	.enable = s6d16d0_enable,
	.get_modes = s6d16d0_get_modes,
};

static int s6d16d0_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct s6d16d0 *s6;
	int ret;

	s6 = devm_kzalloc(dev, sizeof(struct s6d16d0), GFP_KERNEL);
	if (!s6)
		return -ENOMEM;

	mipi_dsi_set_drvdata(dsi, s6);
	s6->dev = dev;

	dsi->lanes = 2;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->hs_rate = 420160000;
	dsi->lp_rate = 19200000;
	/*
	 * This display uses command mode so no MIPI_DSI_MODE_VIDEO
	 * or MIPI_DSI_MODE_VIDEO_SYNC_PULSE
	 *
	 * As we only send commands we do not need to be continuously
	 * clocked.
	 */
	dsi->mode_flags =
		MIPI_DSI_CLOCK_NON_CONTINUOUS |
		MIPI_DSI_MODE_EOT_PACKET;

	s6->supply = devm_regulator_get(dev, "vdd1");
	if (IS_ERR(s6->supply))
		return PTR_ERR(s6->supply);

	/* This asserts RESET by default */
	s6->reset_gpio = devm_gpiod_get_optional(dev, "reset",
						 GPIOD_OUT_HIGH);
	if (IS_ERR(s6->reset_gpio)) {
		ret = PTR_ERR(s6->reset_gpio);
		if (ret != -EPROBE_DEFER)
			DRM_DEV_ERROR(dev, "failed to request GPIO (%d)\n",
				      ret);
		return ret;
	}

	drm_panel_init(&s6->panel, dev, &s6d16d0_drm_funcs);

	ret = drm_panel_add(&s6->panel);
	if (ret < 0)
		return ret;

	ret = mipi_dsi_attach(dsi);
	if (ret < 0)
		drm_panel_remove(&s6->panel);

	return ret;
}

static int s6d16d0_remove(struct mipi_dsi_device *dsi)
{
	struct s6d16d0 *s6 = mipi_dsi_get_drvdata(dsi);

	mipi_dsi_detach(dsi);
	drm_panel_remove(&s6->panel);

	return 0;
}

static const struct of_device_id s6d16d0_of_match[] = {
	{ .compatible = "samsung,s6d16d0" },
	{ }
};
MODULE_DEVICE_TABLE(of, s6d16d0_of_match);

static struct mipi_dsi_driver s6d16d0_driver = {
	.probe = s6d16d0_probe,
	.remove = s6d16d0_remove,
	.driver = {
		.name = "panel-samsung-s6d16d0",
		.of_match_table = s6d16d0_of_match,
	},
};
module_mipi_dsi_driver(s6d16d0_driver);

MODULE_AUTHOR("Linus Wallei <linus.walleij@linaro.org>");
MODULE_DESCRIPTION("MIPI-DSI s6d16d0 Panel Driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
ac1d6d74 LW	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* MIPI-DSI Samsung s6d16d0 panel driver. This is a 864x480
	4	* AMOLED panel with a command-only DSI interface.
	5	*/
	6
	7	#include <drm/drm_modes.h>
	8	#include <drm/drm_mipi_dsi.h>
	9	#include <drm/drm_panel.h>
	10	#include <drm/drm_print.h>
	11
	12	#include <linux/gpio/consumer.h>
	13	#include <linux/regulator/consumer.h>
	14	#include <linux/delay.h>
	15	#include <linux/of_device.h>
	16	#include <linux/module.h>
	17
	18	struct s6d16d0 {
	19	struct device *dev;
	20	struct drm_panel panel;
	21	struct regulator *supply;
	22	struct gpio_desc *reset_gpio;
	23	};
	24
	25	/*
	26	* The timings are not very helpful as the display is used in
	27	* command mode.
	28	*/
	29	static const struct drm_display_mode samsung_s6d16d0_mode = {
	30	/* HS clock, (htotalvtotalvrefresh)/1000 */
	31	.clock = 420160,
	32	.hdisplay = 864,
	33	.hsync_start = 864 + 154,
	34	.hsync_end = 864 + 154 + 16,
	35	.htotal = 864 + 154 + 16 + 32,
	36	.vdisplay = 480,
	37	.vsync_start = 480 + 1,
	38	.vsync_end = 480 + 1 + 1,
	39	.vtotal = 480 + 1 + 1 + 1,
	40	/*
	41	* This depends on the clocking HS vs LP rate, this value
	42	* is calculated as:
	43	* vrefresh = (clock * 1000) / (htotal*vtotal)
	44	*/
	45	.vrefresh = 816,
	46	.width_mm = 84,
	47	.height_mm = 48,
	48	};
	49
	50	static inline struct s6d16d0 panel_to_s6d16d0(struct drm_panel panel)
	51	{
	52	return container_of(panel, struct s6d16d0, panel);
	53	}
	54
	55	static int s6d16d0_unprepare(struct drm_panel *panel)
	56	{
	57	struct s6d16d0 *s6 = panel_to_s6d16d0(panel);
	58	struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev);
	59	int ret;
	60
	61	/* Enter sleep mode */
	62	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
	63	if (ret) {
	64	DRM_DEV_ERROR(s6->dev, "failed to enter sleep mode (%d)\n",
65	ret);
66	return ret;
67	}
68
69	/* Assert RESET */
70	gpiod_set_value_cansleep(s6->reset_gpio, 1);
71	regulator_disable(s6->supply);
72
73	return 0;
74	}
75
76	static int s6d16d0_prepare(struct drm_panel *panel)
77	{
78	struct s6d16d0 *s6 = panel_to_s6d16d0(panel);
79	struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev);
80	int ret;
81
82	ret = regulator_enable(s6->supply);
83	if (ret) {
84	DRM_DEV_ERROR(s6->dev, "failed to enable supply (%d)\n", ret);
85	return ret;
86	}
87
88	/* Assert RESET */
89	gpiod_set_value_cansleep(s6->reset_gpio, 1);
90	udelay(10);
91	/* De-assert RESET */
92	gpiod_set_value_cansleep(s6->reset_gpio, 0);
93	msleep(120);
94
95	/* Enabe tearing mode: send TE (tearing effect) at VBLANK */
96	ret = mipi_dsi_dcs_set_tear_on(dsi,
97	MIPI_DSI_DCS_TEAR_MODE_VBLANK);
98	if (ret) {
f577f7ea	99	DRM_DEV_ERROR(s6->dev, "failed to enable vblank TE (%d)\n",
ac1d6d74 LW	100	ret);
	101	return ret;
	102	}
	103	/* Exit sleep mode and power on */
	104	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
	105	if (ret) {
	106	DRM_DEV_ERROR(s6->dev, "failed to exit sleep mode (%d)\n",
	107	ret);
	108	return ret;
	109	}
	110
	111	return 0;
	112	}
	113
	114	static int s6d16d0_enable(struct drm_panel *panel)
	115	{
	116	struct s6d16d0 *s6 = panel_to_s6d16d0(panel);
	117	struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev);
	118	int ret;
	119
	120	ret = mipi_dsi_dcs_set_display_on(dsi);
	121	if (ret) {
	122	DRM_DEV_ERROR(s6->dev, "failed to turn display on (%d)\n",
	123	ret);
	124	return ret;
	125	}
	126
	127	return 0;
	128	}
	129
	130	static int s6d16d0_disable(struct drm_panel *panel)
	131	{
	132	struct s6d16d0 *s6 = panel_to_s6d16d0(panel);
	133	struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev);
	134	int ret;
	135
	136	ret = mipi_dsi_dcs_set_display_off(dsi);
	137	if (ret) {
	138	DRM_DEV_ERROR(s6->dev, "failed to turn display off (%d)\n",
	139	ret);
	140	return ret;
	141	}
	142
	143	return 0;
	144	}
	145
	146	static int s6d16d0_get_modes(struct drm_panel *panel)
	147	{
	148	struct drm_connector *connector = panel->connector;
	149	struct drm_display_mode *mode;
	150
ac1d6d74 LW	151	mode = drm_mode_duplicate(panel->drm, &samsung_s6d16d0_mode);
	152	if (!mode) {
	153	DRM_ERROR("bad mode or failed to add mode\n");
	154	return -EINVAL;
	155	}
	156	drm_mode_set_name(mode);
	157	mode->type = DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED;
	158
	159	connector->display_info.width_mm = mode->width_mm;
	160	connector->display_info.height_mm = mode->height_mm;
	161
	162	drm_mode_probed_add(connector, mode);
	163
	164	return 1; /* Number of modes */
	165	}
	166
	167	static const struct drm_panel_funcs s6d16d0_drm_funcs = {
	168	.disable = s6d16d0_disable,
	169	.unprepare = s6d16d0_unprepare,
	170	.prepare = s6d16d0_prepare,
	171	.enable = s6d16d0_enable,
	172	.get_modes = s6d16d0_get_modes,
	173	};
	174
	175	static int s6d16d0_probe(struct mipi_dsi_device *dsi)
	176	{
	177	struct device *dev = &dsi->dev;
	178	struct s6d16d0 *s6;
	179	int ret;
	180
	181	s6 = devm_kzalloc(dev, sizeof(struct s6d16d0), GFP_KERNEL);
	182	if (!s6)
	183	return -ENOMEM;
	184
	185	mipi_dsi_set_drvdata(dsi, s6);
	186	s6->dev = dev;
	187
	188	dsi->lanes = 2;
	189	dsi->format = MIPI_DSI_FMT_RGB888;
	190	dsi->hs_rate = 420160000;
	191	dsi->lp_rate = 19200000;
	192	/*
	193	* This display uses command mode so no MIPI_DSI_MODE_VIDEO
	194	* or MIPI_DSI_MODE_VIDEO_SYNC_PULSE
	195	*
	196	* As we only send commands we do not need to be continuously
	197	* clocked.
	198	*/
	199	dsi->mode_flags =
	200	MIPI_DSI_CLOCK_NON_CONTINUOUS \|
	201	MIPI_DSI_MODE_EOT_PACKET;
	202
	203	s6->supply = devm_regulator_get(dev, "vdd1");
	204	if (IS_ERR(s6->supply))
	205	return PTR_ERR(s6->supply);
	206
	207	/* This asserts RESET by default */
	208	s6->reset_gpio = devm_gpiod_get_optional(dev, "reset",
	209	GPIOD_OUT_HIGH);
	210	if (IS_ERR(s6->reset_gpio)) {
	211	ret = PTR_ERR(s6->reset_gpio);
	212	if (ret != -EPROBE_DEFER)
	213	DRM_DEV_ERROR(dev, "failed to request GPIO (%d)\n",
	214	ret);
215	return ret;
216	}
217
6dbe0c4b	218	drm_panel_init(&s6->panel, dev, &s6d16d0_drm_funcs);
ac1d6d74 LW	219
	220	ret = drm_panel_add(&s6->panel);
	221	if (ret < 0)
	222	return ret;
	223
	224	ret = mipi_dsi_attach(dsi);
	225	if (ret < 0)
	226	drm_panel_remove(&s6->panel);
	227
	228	return ret;
	229	}
	230
	231	static int s6d16d0_remove(struct mipi_dsi_device *dsi)
	232	{
	233	struct s6d16d0 *s6 = mipi_dsi_get_drvdata(dsi);
	234
	235	mipi_dsi_detach(dsi);
	236	drm_panel_remove(&s6->panel);
	237
	238	return 0;
	239	}
	240
	241	static const struct of_device_id s6d16d0_of_match[] = {
	242	{ .compatible = "samsung,s6d16d0" },
	243	{ }
	244	};
	245	MODULE_DEVICE_TABLE(of, s6d16d0_of_match);
	246
	247	static struct mipi_dsi_driver s6d16d0_driver = {
	248	.probe = s6d16d0_probe,
	249	.remove = s6d16d0_remove,
	250	.driver = {
	251	.name = "panel-samsung-s6d16d0",
	252	.of_match_table = s6d16d0_of_match,
	253	},
	254	};
	255	module_mipi_dsi_driver(s6d16d0_driver);
	256
	257	MODULE_AUTHOR("Linus Wallei <linus.walleij@linaro.org>");
	258	MODULE_DESCRIPTION("MIPI-DSI s6d16d0 Panel Driver");
	259	MODULE_LICENSE("GPL v2");