1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 *  Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
  4 *  Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
  5 */
  6
  7#include <linux/backlight.h>
  8#include <linux/module.h>
  9#include <linux/of.h>
 10#include <linux/regulator/consumer.h>
 11
 12#include <drm/drm_crtc.h>
 13#include <drm/drm_device.h>
 14#include <drm/drm_mipi_dsi.h>
 15#include <drm/drm_panel.h>
 16
 17#include <video/mipi_display.h>
 18
 19struct osd101t2587_panel {
 20	struct drm_panel base;
 21	struct mipi_dsi_device *dsi;
 22
 23	struct backlight_device *backlight;
 24	struct regulator *supply;
 25
 26	bool prepared;
 27	bool enabled;
 28
 29	const struct drm_display_mode *default_mode;
 30};
 31
 32static inline struct osd101t2587_panel *ti_osd_panel(struct drm_panel *panel)
 33{
 34	return container_of(panel, struct osd101t2587_panel, base);
 35}
 36
 37static int osd101t2587_panel_disable(struct drm_panel *panel)
 38{
 39	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
 40	int ret;
 41
 42	if (!osd101t2587->enabled)
 43		return 0;
 44
 45	backlight_disable(osd101t2587->backlight);
 46
 47	ret = mipi_dsi_shutdown_peripheral(osd101t2587->dsi);
 48
 49	osd101t2587->enabled = false;
 50
 51	return ret;
 52}
 53
 54static int osd101t2587_panel_unprepare(struct drm_panel *panel)
 55{
 56	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
 57
 58	if (!osd101t2587->prepared)
 59		return 0;
 60
 61	regulator_disable(osd101t2587->supply);
 62	osd101t2587->prepared = false;
 63
 64	return 0;
 65}
 66
 67static int osd101t2587_panel_prepare(struct drm_panel *panel)
 68{
 69	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
 70	int ret;
 71
 72	if (osd101t2587->prepared)
 73		return 0;
 74
 75	ret = regulator_enable(osd101t2587->supply);
 76	if (!ret)
 77		osd101t2587->prepared = true;
 78
 79	return ret;
 80}
 81
 82static int osd101t2587_panel_enable(struct drm_panel *panel)
 83{
 84	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
 85	int ret;
 86
 87	if (osd101t2587->enabled)
 88		return 0;
 89
 90	ret = mipi_dsi_turn_on_peripheral(osd101t2587->dsi);
 91	if (ret)
 92		return ret;
 93
 94	backlight_enable(osd101t2587->backlight);
 95
 96	osd101t2587->enabled = true;
 97
 98	return ret;
 99}
100
101static const struct drm_display_mode default_mode_osd101t2587 = {
102	.clock = 164400,
103	.hdisplay = 1920,
104	.hsync_start = 1920 + 152,
105	.hsync_end = 1920 + 152 + 52,
106	.htotal = 1920 + 152 + 52 + 20,
107	.vdisplay = 1200,
108	.vsync_start = 1200 + 24,
109	.vsync_end = 1200 + 24 + 6,
110	.vtotal = 1200 + 24 + 6 + 48,
111	.vrefresh = 60,
112	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
113};
114
115static int osd101t2587_panel_get_modes(struct drm_panel *panel)
116{
117	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
118	struct drm_display_mode *mode;
119
120	mode = drm_mode_duplicate(panel->drm, osd101t2587->default_mode);
121	if (!mode) {
122		dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
123			osd101t2587->default_mode->hdisplay,
124			osd101t2587->default_mode->vdisplay,
125			osd101t2587->default_mode->vrefresh);
126		return -ENOMEM;
127	}
128
129	drm_mode_set_name(mode);
130
131	drm_mode_probed_add(panel->connector, mode);
132
133	panel->connector->display_info.width_mm = 217;
134	panel->connector->display_info.height_mm = 136;
135
136	return 1;
137}
138
139static const struct drm_panel_funcs osd101t2587_panel_funcs = {
140	.disable = osd101t2587_panel_disable,
141	.unprepare = osd101t2587_panel_unprepare,
142	.prepare = osd101t2587_panel_prepare,
143	.enable = osd101t2587_panel_enable,
144	.get_modes = osd101t2587_panel_get_modes,
145};
146
147static const struct of_device_id osd101t2587_of_match[] = {
148	{
149		.compatible = "osddisplays,osd101t2587-53ts",
150		.data = &default_mode_osd101t2587,
151	}, {
152		/* sentinel */
153	}
154};
155MODULE_DEVICE_TABLE(of, osd101t2587_of_match);
156
157static int osd101t2587_panel_add(struct osd101t2587_panel *osd101t2587)
158{
159	struct device *dev = &osd101t2587->dsi->dev;
160
161	osd101t2587->supply = devm_regulator_get(dev, "power");
162	if (IS_ERR(osd101t2587->supply))
163		return PTR_ERR(osd101t2587->supply);
164
165	osd101t2587->backlight = devm_of_find_backlight(dev);
166	if (IS_ERR(osd101t2587->backlight))
167		return PTR_ERR(osd101t2587->backlight);
168
169	drm_panel_init(&osd101t2587->base);
170	osd101t2587->base.funcs = &osd101t2587_panel_funcs;
171	osd101t2587->base.dev = &osd101t2587->dsi->dev;
172
173	return drm_panel_add(&osd101t2587->base);
174}
175
176static int osd101t2587_panel_probe(struct mipi_dsi_device *dsi)
177{
178	struct osd101t2587_panel *osd101t2587;
179	const struct of_device_id *id;
180	int ret;
181
182	id = of_match_node(osd101t2587_of_match, dsi->dev.of_node);
183	if (!id)
184		return -ENODEV;
185
186	dsi->lanes = 4;
187	dsi->format = MIPI_DSI_FMT_RGB888;
188	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
189			  MIPI_DSI_MODE_VIDEO_BURST |
190			  MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
191			  MIPI_DSI_MODE_EOT_PACKET;
192
193	osd101t2587 = devm_kzalloc(&dsi->dev, sizeof(*osd101t2587), GFP_KERNEL);
194	if (!osd101t2587)
195		return -ENOMEM;
196
197	mipi_dsi_set_drvdata(dsi, osd101t2587);
198
199	osd101t2587->dsi = dsi;
200	osd101t2587->default_mode = id->data;
201
202	ret = osd101t2587_panel_add(osd101t2587);
203	if (ret < 0)
204		return ret;
205
206	ret = mipi_dsi_attach(dsi);
207	if (ret)
208		drm_panel_remove(&osd101t2587->base);
209
210	return ret;
211}
212
213static int osd101t2587_panel_remove(struct mipi_dsi_device *dsi)
214{
215	struct osd101t2587_panel *osd101t2587 = mipi_dsi_get_drvdata(dsi);
216	int ret;
217
218	ret = osd101t2587_panel_disable(&osd101t2587->base);
219	if (ret < 0)
220		dev_warn(&dsi->dev, "failed to disable panel: %d\n", ret);
221
222	osd101t2587_panel_unprepare(&osd101t2587->base);
223
224	drm_panel_remove(&osd101t2587->base);
225
226	ret = mipi_dsi_detach(dsi);
227	if (ret < 0)
228		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
229
230	return ret;
231}
232
233static void osd101t2587_panel_shutdown(struct mipi_dsi_device *dsi)
234{
235	struct osd101t2587_panel *osd101t2587 = mipi_dsi_get_drvdata(dsi);
236
237	osd101t2587_panel_disable(&osd101t2587->base);
238	osd101t2587_panel_unprepare(&osd101t2587->base);
239}
240
241static struct mipi_dsi_driver osd101t2587_panel_driver = {
242	.driver = {
243		.name = "panel-osd-osd101t2587-53ts",
244		.of_match_table = osd101t2587_of_match,
245	},
246	.probe = osd101t2587_panel_probe,
247	.remove = osd101t2587_panel_remove,
248	.shutdown = osd101t2587_panel_shutdown,
249};
250module_mipi_dsi_driver(osd101t2587_panel_driver);
251
252MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
253MODULE_DESCRIPTION("OSD101T2587-53TS DSI panel");
254MODULE_LICENSE("GPL v2");