tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2022 Joel Selvaraj <jo@jsfamily.in>
4 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
5 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
6 */
7
8#include <linux/delay.h>
9#include <linux/gpio/consumer.h>
10#include <linux/regulator/consumer.h>
11#include <linux/module.h>
12#include <linux/of.h>
13
14#include <video/mipi_display.h>
15
16#include <drm/drm_mipi_dsi.h>
17#include <drm/drm_modes.h>
18#include <drm/drm_panel.h>
19
20static const char * const regulator_names[] = {
21 "vddio",
22 "vddpos",
23 "vddneg",
24};
25
26static const unsigned long regulator_enable_loads[] = {
27 62000,
28 100000,
29 100000
30};
31
32struct ebbg_ft8719 {
33 struct drm_panel panel;
34 struct mipi_dsi_device *dsi;
35
36 struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)];
37
38 struct gpio_desc *reset_gpio;
39};
40
41static inline
42struct ebbg_ft8719 *to_ebbg_ft8719(struct drm_panel *panel)
43{
44 return container_of(panel, struct ebbg_ft8719, panel);
45}
46
47static void ebbg_ft8719_reset(struct ebbg_ft8719 *ctx)
48{
49 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
50 usleep_range(4000, 5000);
51 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
52 usleep_range(1000, 2000);
53 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
54 usleep_range(15000, 16000);
55}
56
57static int ebbg_ft8719_on(struct ebbg_ft8719 *ctx)
58{
59 struct mipi_dsi_device *dsi = ctx->dsi;
60 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
61
62 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
63
64 mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x00ff);
65 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24);
66 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
67
68 mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
69 mipi_dsi_msleep(&dsi_ctx, 90);
70 mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
71
72 return dsi_ctx.accum_err;
73}
74
75static int ebbg_ft8719_off(struct ebbg_ft8719 *ctx)
76{
77 struct mipi_dsi_device *dsi = ctx->dsi;
78 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
79
80 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
81
82 mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
83 mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
84 mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
85 mipi_dsi_msleep(&dsi_ctx, 90);
86
87 return dsi_ctx.accum_err;
88}
89
90static int ebbg_ft8719_prepare(struct drm_panel *panel)
91{
92 struct ebbg_ft8719 *ctx = to_ebbg_ft8719(panel);
93 int ret;
94
95 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
96 if (ret < 0)
97 return ret;
98
99 ebbg_ft8719_reset(ctx);
100
101 ret = ebbg_ft8719_on(ctx);
102 if (ret < 0) {
103 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
104 return ret;
105 }
106
107 return 0;
108}
109
110static int ebbg_ft8719_unprepare(struct drm_panel *panel)
111{
112 struct ebbg_ft8719 *ctx = to_ebbg_ft8719(panel);
113
114 ebbg_ft8719_off(ctx);
115 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
116 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
117
118 return 0;
119}
120
121static const struct drm_display_mode ebbg_ft8719_mode = {
122 .clock = (1080 + 28 + 4 + 16) * (2246 + 120 + 4 + 12) * 60 / 1000,
123 .hdisplay = 1080,
124 .hsync_start = 1080 + 28,
125 .hsync_end = 1080 + 28 + 4,
126 .htotal = 1080 + 28 + 4 + 16,
127 .vdisplay = 2246,
128 .vsync_start = 2246 + 120,
129 .vsync_end = 2246 + 120 + 4,
130 .vtotal = 2246 + 120 + 4 + 12,
131 .width_mm = 68,
132 .height_mm = 141,
133};
134
135static int ebbg_ft8719_get_modes(struct drm_panel *panel,
136 struct drm_connector *connector)
137{
138 struct drm_display_mode *mode;
139
140 mode = drm_mode_duplicate(connector->dev, &ebbg_ft8719_mode);
141 if (!mode)
142 return -ENOMEM;
143
144 drm_mode_set_name(mode);
145
146 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
147 connector->display_info.width_mm = mode->width_mm;
148 connector->display_info.height_mm = mode->height_mm;
149 drm_mode_probed_add(connector, mode);
150
151 return 1;
152}
153
154static const struct drm_panel_funcs ebbg_ft8719_panel_funcs = {
155 .prepare = ebbg_ft8719_prepare,
156 .unprepare = ebbg_ft8719_unprepare,
157 .get_modes = ebbg_ft8719_get_modes,
158};
159
160static int ebbg_ft8719_probe(struct mipi_dsi_device *dsi)
161{
162 struct device *dev = &dsi->dev;
163 struct ebbg_ft8719 *ctx;
164 int i, ret;
165
166 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
167 if (!ctx)
168 return -ENOMEM;
169
170 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++)
171 ctx->supplies[i].supply = regulator_names[i];
172
173 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
174 ctx->supplies);
175 if (ret < 0)
176 return dev_err_probe(dev, ret, "Failed to get regulators\n");
177
178 for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
179 ret = regulator_set_load(ctx->supplies[i].consumer,
180 regulator_enable_loads[i]);
181 if (ret)
182 return dev_err_probe(dev, ret,
183 "Failed to set regulator load\n");
184 }
185
186 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
187 if (IS_ERR(ctx->reset_gpio))
188 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
189 "Failed to get reset-gpios\n");
190
191 ctx->dsi = dsi;
192 mipi_dsi_set_drvdata(dsi, ctx);
193
194 dsi->lanes = 4;
195 dsi->format = MIPI_DSI_FMT_RGB888;
196 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
197 MIPI_DSI_CLOCK_NON_CONTINUOUS;
198
199 drm_panel_init(&ctx->panel, dev, &ebbg_ft8719_panel_funcs,
200 DRM_MODE_CONNECTOR_DSI);
201
202 ret = drm_panel_of_backlight(&ctx->panel);
203 if (ret)
204 return dev_err_probe(dev, ret, "Failed to get backlight\n");
205
206 drm_panel_add(&ctx->panel);
207
208 ret = mipi_dsi_attach(dsi);
209 if (ret < 0) {
210 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
211 drm_panel_remove(&ctx->panel);
212 return ret;
213 }
214
215 return 0;
216}
217
218static void ebbg_ft8719_remove(struct mipi_dsi_device *dsi)
219{
220 struct ebbg_ft8719 *ctx = mipi_dsi_get_drvdata(dsi);
221 int ret;
222
223 ret = mipi_dsi_detach(dsi);
224 if (ret < 0)
225 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
226
227 drm_panel_remove(&ctx->panel);
228}
229
230static const struct of_device_id ebbg_ft8719_of_match[] = {
231 { .compatible = "ebbg,ft8719" },
232 { /* sentinel */ }
233};
234MODULE_DEVICE_TABLE(of, ebbg_ft8719_of_match);
235
236static struct mipi_dsi_driver ebbg_ft8719_driver = {
237 .probe = ebbg_ft8719_probe,
238 .remove = ebbg_ft8719_remove,
239 .driver = {
240 .name = "panel-ebbg-ft8719",
241 .of_match_table = ebbg_ft8719_of_match,
242 },
243};
244module_mipi_dsi_driver(ebbg_ft8719_driver);
245
246MODULE_AUTHOR("Joel Selvaraj <jo@jsfamily.in>");
247MODULE_DESCRIPTION("DRM driver for EBBG FT8719 video dsi panel");
248MODULE_LICENSE("GPL v2");