1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2019, The Linux Foundation. All rights reserved.
  4 */
  5
  6#include <linux/delay.h>
  7#include <linux/module.h>
  8#include <linux/of_device.h>
  9#include <linux/gpio/consumer.h>
 10#include <linux/regulator/consumer.h>
 11
 12#include <video/mipi_display.h>
 13
 14#include <drm/drm_mipi_dsi.h>
 15#include <drm/drm_modes.h>
 16#include <drm/drm_panel.h>
 17#include <drm/drm_print.h>
 18
 19struct visionox_rm69299 {
 20	struct drm_panel panel;
 21	struct regulator_bulk_data supplies[2];
 22	struct gpio_desc *reset_gpio;
 23	struct mipi_dsi_device *dsi;
 24	bool prepared;
 25	bool enabled;
 26};
 27
 28static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)
 29{
 30	return container_of(panel, struct visionox_rm69299, panel);
 31}
 32
 33static int visionox_rm69299_power_on(struct visionox_rm69299 *ctx)
 34{
 35	int ret;
 36
 37	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 38	if (ret < 0)
 39		return ret;
 40
 41	/*
 42	 * Reset sequence of visionox panel requires the panel to be
 43	 * out of reset for 10ms, followed by being held in reset
 44	 * for 10ms and then out again
 45	 */
 46	gpiod_set_value(ctx->reset_gpio, 1);
 47	usleep_range(10000, 20000);
 48	gpiod_set_value(ctx->reset_gpio, 0);
 49	usleep_range(10000, 20000);
 50	gpiod_set_value(ctx->reset_gpio, 1);
 51	usleep_range(10000, 20000);
 52
 53	return 0;
 54}
 55
 56static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)
 57{
 58	gpiod_set_value(ctx->reset_gpio, 0);
 59
 60	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 61}
 62
 63static int visionox_rm69299_unprepare(struct drm_panel *panel)
 64{
 65	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
 66	int ret;
 67
 68	ctx->dsi->mode_flags = 0;
 69
 70	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);
 71	if (ret < 0)
 72		DRM_DEV_ERROR(ctx->panel.dev,
 73			      "set_display_off cmd failed ret = %d\n", ret);
 74
 75	/* 120ms delay required here as per DCS spec */
 76	msleep(120);
 77
 78	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);
 79	if (ret < 0) {
 80		DRM_DEV_ERROR(ctx->panel.dev,
 81			      "enter_sleep cmd failed ret = %d\n", ret);
 82	}
 83
 84	ret = visionox_rm69299_power_off(ctx);
 85
 86	ctx->prepared = false;
 87	return ret;
 88}
 89
 90static int visionox_rm69299_prepare(struct drm_panel *panel)
 91{
 92	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
 93	int ret;
 94
 95	if (ctx->prepared)
 96		return 0;
 97
 98	ret = visionox_rm69299_power_on(ctx);
 99	if (ret < 0)
100		return ret;
101
102	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
103
104	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xfe, 0x00 }, 2);
105	if (ret < 0) {
106		DRM_DEV_ERROR(ctx->panel.dev,
107			      "cmd set tx 0 failed, ret = %d\n", ret);
108		goto power_off;
109	}
110
111	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xc2, 0x08 }, 2);
112	if (ret < 0) {
113		DRM_DEV_ERROR(ctx->panel.dev,
114			      "cmd set tx 1 failed, ret = %d\n", ret);
115		goto power_off;
116	}
117
118	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x35, 0x00 }, 2);
119	if (ret < 0) {
120		DRM_DEV_ERROR(ctx->panel.dev,
121			      "cmd set tx 2 failed, ret = %d\n", ret);
122		goto power_off;
123	}
124
125	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x51, 0xff }, 2);
126	if (ret < 0) {
127		DRM_DEV_ERROR(ctx->panel.dev,
128			      "cmd set tx 3 failed, ret = %d\n", ret);
129		goto power_off;
130	}
131
132	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);
133	if (ret < 0) {
134		DRM_DEV_ERROR(ctx->panel.dev,
135			      "exit_sleep_mode cmd failed ret = %d\n", ret);
136		goto power_off;
137	}
138
139	/* Per DSI spec wait 120ms after sending exit sleep DCS command */
140	msleep(120);
141
142	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
143	if (ret < 0) {
144		DRM_DEV_ERROR(ctx->panel.dev,
145			      "set_display_on cmd failed ret = %d\n", ret);
146		goto power_off;
147	}
148
149	/* Per DSI spec wait 120ms after sending set_display_on DCS command */
150	msleep(120);
151
152	ctx->prepared = true;
153
154	return 0;
155
156power_off:
157	return ret;
158}
159
160static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
161	.name = "1080x2248",
162	.clock = 158695,
163	.hdisplay = 1080,
164	.hsync_start = 1080 + 26,
165	.hsync_end = 1080 + 26 + 2,
166	.htotal = 1080 + 26 + 2 + 36,
167	.vdisplay = 2248,
168	.vsync_start = 2248 + 56,
169	.vsync_end = 2248 + 56 + 4,
170	.vtotal = 2248 + 56 + 4 + 4,
171	.flags = 0,
172};
173
174static int visionox_rm69299_get_modes(struct drm_panel *panel,
175				      struct drm_connector *connector)
176{
177	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
178	struct drm_display_mode *mode;
179
180	mode = drm_mode_create(connector->dev);
181	if (!mode) {
182		DRM_DEV_ERROR(ctx->panel.dev,
183			      "failed to create a new display mode\n");
184		return 0;
185	}
186
187	connector->display_info.width_mm = 74;
188	connector->display_info.height_mm = 131;
189	drm_mode_copy(mode, &visionox_rm69299_1080x2248_60hz);
190	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
191	drm_mode_probed_add(connector, mode);
192
193	return 1;
194}
195
196static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {
197	.unprepare = visionox_rm69299_unprepare,
198	.prepare = visionox_rm69299_prepare,
199	.get_modes = visionox_rm69299_get_modes,
200};
201
202static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
203{
204	struct device *dev = &dsi->dev;
205	struct visionox_rm69299 *ctx;
206	int ret;
207
208	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
209	if (!ctx)
210		return -ENOMEM;
211
212	mipi_dsi_set_drvdata(dsi, ctx);
213
214	ctx->panel.dev = dev;
215	ctx->dsi = dsi;
216
217	ctx->supplies[0].supply = "vdda";
218	ctx->supplies[1].supply = "vdd3p3";
219
220	ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),
221				      ctx->supplies);
222	if (ret < 0)
223		return ret;
224
225	ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev,
226					 "reset", GPIOD_OUT_LOW);
227	if (IS_ERR(ctx->reset_gpio)) {
228		DRM_DEV_ERROR(dev, "cannot get reset gpio %ld\n",
229			      PTR_ERR(ctx->reset_gpio));
230		return PTR_ERR(ctx->reset_gpio);
231	}
232
233	drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,
234		       DRM_MODE_CONNECTOR_DSI);
235	ctx->panel.dev = dev;
236	ctx->panel.funcs = &visionox_rm69299_drm_funcs;
237	drm_panel_add(&ctx->panel);
238
239	dsi->lanes = 4;
240	dsi->format = MIPI_DSI_FMT_RGB888;
241	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
242			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
243	ret = mipi_dsi_attach(dsi);
244	if (ret < 0) {
245		DRM_DEV_ERROR(dev, "dsi attach failed ret = %d\n", ret);
246		goto err_dsi_attach;
247	}
248
249	ret = regulator_set_load(ctx->supplies[0].consumer, 32000);
250	if (ret) {
251		DRM_DEV_ERROR(dev,
252			      "regulator set load failed for vdda supply ret = %d\n",
253			      ret);
254		goto err_set_load;
255	}
256
257	ret = regulator_set_load(ctx->supplies[1].consumer, 13200);
258	if (ret) {
259		DRM_DEV_ERROR(dev,
260			      "regulator set load failed for vdd3p3 supply ret = %d\n",
261			      ret);
262		goto err_set_load;
263	}
264
265	return 0;
266
267err_set_load:
268	mipi_dsi_detach(dsi);
269err_dsi_attach:
270	drm_panel_remove(&ctx->panel);
271	return ret;
272}
273
274static int visionox_rm69299_remove(struct mipi_dsi_device *dsi)
275{
276	struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);
277
278	mipi_dsi_detach(ctx->dsi);
279	mipi_dsi_device_unregister(ctx->dsi);
280
281	drm_panel_remove(&ctx->panel);
282	return 0;
283}
284
285static const struct of_device_id visionox_rm69299_of_match[] = {
286	{ .compatible = "visionox,rm69299-1080p-display", },
287	{ /* sentinel */ }
288};
289MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);
290
291static struct mipi_dsi_driver visionox_rm69299_driver = {
292	.driver = {
293		.name = "panel-visionox-rm69299",
294		.of_match_table = visionox_rm69299_of_match,
295	},
296	.probe = visionox_rm69299_probe,
297	.remove = visionox_rm69299_remove,
298};
299module_mipi_dsi_driver(visionox_rm69299_driver);
300
301MODULE_DESCRIPTION("Visionox RM69299 DSI Panel Driver");
302MODULE_LICENSE("GPL v2");