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