1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * DRM driver for the HX8357D LCD controller |
4 | * |
5 | * Copyright 2018 Broadcom |
6 | * Copyright 2018 David Lechner <david@lechnology.com> |
7 | * Copyright 2016 Noralf Trønnes |
8 | * Copyright (C) 2015 Adafruit Industries |
9 | * Copyright (C) 2013 Christian Vogelgsang |
10 | */ |
11 | |
12 | #include <linux/backlight.h> |
13 | #include <linux/delay.h> |
14 | #include <linux/gpio/consumer.h> |
15 | #include <linux/module.h> |
16 | #include <linux/property.h> |
17 | #include <linux/spi/spi.h> |
18 | |
19 | #include <drm/drm_atomic_helper.h> |
20 | #include <drm/drm_drv.h> |
21 | #include <drm/drm_fbdev_generic.h> |
22 | #include <drm/drm_gem_atomic_helper.h> |
23 | #include <drm/drm_gem_dma_helper.h> |
24 | #include <drm/drm_managed.h> |
25 | #include <drm/drm_mipi_dbi.h> |
26 | #include <drm/drm_modeset_helper.h> |
27 | #include <video/mipi_display.h> |
28 | |
29 | #define HX8357D_SETOSC 0xb0 |
30 | #define HX8357D_SETPOWER 0xb1 |
31 | #define HX8357D_SETRGB 0xb3 |
32 | #define HX8357D_SETCYC 0xb3 |
33 | #define HX8357D_SETCOM 0xb6 |
34 | #define HX8357D_SETEXTC 0xb9 |
35 | #define HX8357D_SETSTBA 0xc0 |
36 | #define HX8357D_SETPANEL 0xcc |
37 | #define HX8357D_SETGAMMA 0xe0 |
38 | |
39 | #define HX8357D_MADCTL_MY 0x80 |
40 | #define HX8357D_MADCTL_MX 0x40 |
41 | #define HX8357D_MADCTL_MV 0x20 |
42 | #define HX8357D_MADCTL_ML 0x10 |
43 | #define HX8357D_MADCTL_RGB 0x00 |
44 | #define HX8357D_MADCTL_BGR 0x08 |
45 | #define HX8357D_MADCTL_MH 0x04 |
46 | |
47 | static void yx240qv29_enable(struct drm_simple_display_pipe *pipe, |
48 | struct drm_crtc_state *crtc_state, |
49 | struct drm_plane_state *plane_state) |
50 | { |
51 | struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(drm: pipe->crtc.dev); |
52 | struct mipi_dbi *dbi = &dbidev->dbi; |
53 | u8 addr_mode; |
54 | int ret, idx; |
55 | |
56 | if (!drm_dev_enter(dev: pipe->crtc.dev, idx: &idx)) |
57 | return; |
58 | |
59 | DRM_DEBUG_KMS("\n" ); |
60 | |
61 | ret = mipi_dbi_poweron_conditional_reset(dbidev); |
62 | if (ret < 0) |
63 | goto out_exit; |
64 | if (ret == 1) |
65 | goto out_enable; |
66 | |
67 | /* setextc */ |
68 | mipi_dbi_command(dbi, HX8357D_SETEXTC, 0xFF, 0x83, 0x57); |
69 | msleep(msecs: 150); |
70 | |
71 | /* setRGB which also enables SDO */ |
72 | mipi_dbi_command(dbi, HX8357D_SETRGB, 0x00, 0x00, 0x06, 0x06); |
73 | |
74 | /* -1.52V */ |
75 | mipi_dbi_command(dbi, HX8357D_SETCOM, 0x25); |
76 | |
77 | /* Normal mode 70Hz, Idle mode 55 Hz */ |
78 | mipi_dbi_command(dbi, HX8357D_SETOSC, 0x68); |
79 | |
80 | /* Set Panel - BGR, Gate direction swapped */ |
81 | mipi_dbi_command(dbi, HX8357D_SETPANEL, 0x05); |
82 | |
83 | mipi_dbi_command(dbi, HX8357D_SETPOWER, |
84 | 0x00, /* Not deep standby */ |
85 | 0x15, /* BT */ |
86 | 0x1C, /* VSPR */ |
87 | 0x1C, /* VSNR */ |
88 | 0x83, /* AP */ |
89 | 0xAA); /* FS */ |
90 | |
91 | mipi_dbi_command(dbi, HX8357D_SETSTBA, |
92 | 0x50, /* OPON normal */ |
93 | 0x50, /* OPON idle */ |
94 | 0x01, /* STBA */ |
95 | 0x3C, /* STBA */ |
96 | 0x1E, /* STBA */ |
97 | 0x08); /* GEN */ |
98 | |
99 | mipi_dbi_command(dbi, HX8357D_SETCYC, |
100 | 0x02, /* NW 0x02 */ |
101 | 0x40, /* RTN */ |
102 | 0x00, /* DIV */ |
103 | 0x2A, /* DUM */ |
104 | 0x2A, /* DUM */ |
105 | 0x0D, /* GDON */ |
106 | 0x78); /* GDOFF */ |
107 | |
108 | mipi_dbi_command(dbi, HX8357D_SETGAMMA, |
109 | 0x02, |
110 | 0x0A, |
111 | 0x11, |
112 | 0x1d, |
113 | 0x23, |
114 | 0x35, |
115 | 0x41, |
116 | 0x4b, |
117 | 0x4b, |
118 | 0x42, |
119 | 0x3A, |
120 | 0x27, |
121 | 0x1B, |
122 | 0x08, |
123 | 0x09, |
124 | 0x03, |
125 | 0x02, |
126 | 0x0A, |
127 | 0x11, |
128 | 0x1d, |
129 | 0x23, |
130 | 0x35, |
131 | 0x41, |
132 | 0x4b, |
133 | 0x4b, |
134 | 0x42, |
135 | 0x3A, |
136 | 0x27, |
137 | 0x1B, |
138 | 0x08, |
139 | 0x09, |
140 | 0x03, |
141 | 0x00, |
142 | 0x01); |
143 | |
144 | /* 16 bit */ |
145 | mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, |
146 | MIPI_DCS_PIXEL_FMT_16BIT); |
147 | |
148 | /* TE off */ |
149 | mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_ON, 0x00); |
150 | |
151 | /* tear line */ |
152 | mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02); |
153 | |
154 | /* Exit Sleep */ |
155 | mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); |
156 | msleep(msecs: 150); |
157 | |
158 | /* display on */ |
159 | mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); |
160 | usleep_range(min: 5000, max: 7000); |
161 | |
162 | out_enable: |
163 | switch (dbidev->rotation) { |
164 | default: |
165 | addr_mode = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY; |
166 | break; |
167 | case 90: |
168 | addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY; |
169 | break; |
170 | case 180: |
171 | addr_mode = 0; |
172 | break; |
173 | case 270: |
174 | addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX; |
175 | break; |
176 | } |
177 | mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); |
178 | mipi_dbi_enable_flush(dbidev, crtc_state, plan_state: plane_state); |
179 | out_exit: |
180 | drm_dev_exit(idx); |
181 | } |
182 | |
183 | static const struct drm_simple_display_pipe_funcs hx8357d_pipe_funcs = { |
184 | DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable), |
185 | }; |
186 | |
187 | static const struct drm_display_mode yx350hv15_mode = { |
188 | DRM_SIMPLE_MODE(320, 480, 60, 75), |
189 | }; |
190 | |
191 | DEFINE_DRM_GEM_DMA_FOPS(hx8357d_fops); |
192 | |
193 | static const struct drm_driver hx8357d_driver = { |
194 | .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, |
195 | .fops = &hx8357d_fops, |
196 | DRM_GEM_DMA_DRIVER_OPS_VMAP, |
197 | .debugfs_init = mipi_dbi_debugfs_init, |
198 | .name = "hx8357d" , |
199 | .desc = "HX8357D" , |
200 | .date = "20181023" , |
201 | .major = 1, |
202 | .minor = 0, |
203 | }; |
204 | |
205 | static const struct of_device_id hx8357d_of_match[] = { |
206 | { .compatible = "adafruit,yx350hv15" }, |
207 | { } |
208 | }; |
209 | MODULE_DEVICE_TABLE(of, hx8357d_of_match); |
210 | |
211 | static const struct spi_device_id hx8357d_id[] = { |
212 | { "yx350hv15" , 0 }, |
213 | { } |
214 | }; |
215 | MODULE_DEVICE_TABLE(spi, hx8357d_id); |
216 | |
217 | static int hx8357d_probe(struct spi_device *spi) |
218 | { |
219 | struct device *dev = &spi->dev; |
220 | struct mipi_dbi_dev *dbidev; |
221 | struct drm_device *drm; |
222 | struct gpio_desc *dc; |
223 | u32 rotation = 0; |
224 | int ret; |
225 | |
226 | dbidev = devm_drm_dev_alloc(dev, &hx8357d_driver, |
227 | struct mipi_dbi_dev, drm); |
228 | if (IS_ERR(ptr: dbidev)) |
229 | return PTR_ERR(ptr: dbidev); |
230 | |
231 | drm = &dbidev->drm; |
232 | |
233 | dc = devm_gpiod_get(dev, con_id: "dc" , flags: GPIOD_OUT_LOW); |
234 | if (IS_ERR(ptr: dc)) |
235 | return dev_err_probe(dev, err: PTR_ERR(ptr: dc), fmt: "Failed to get GPIO 'dc'\n" ); |
236 | |
237 | dbidev->backlight = devm_of_find_backlight(dev); |
238 | if (IS_ERR(ptr: dbidev->backlight)) |
239 | return PTR_ERR(ptr: dbidev->backlight); |
240 | |
241 | device_property_read_u32(dev, propname: "rotation" , val: &rotation); |
242 | |
243 | ret = mipi_dbi_spi_init(spi, dbi: &dbidev->dbi, dc); |
244 | if (ret) |
245 | return ret; |
246 | |
247 | ret = mipi_dbi_dev_init(dbidev, funcs: &hx8357d_pipe_funcs, mode: &yx350hv15_mode, rotation); |
248 | if (ret) |
249 | return ret; |
250 | |
251 | drm_mode_config_reset(dev: drm); |
252 | |
253 | ret = drm_dev_register(dev: drm, flags: 0); |
254 | if (ret) |
255 | return ret; |
256 | |
257 | spi_set_drvdata(spi, data: drm); |
258 | |
259 | drm_fbdev_generic_setup(dev: drm, preferred_bpp: 0); |
260 | |
261 | return 0; |
262 | } |
263 | |
264 | static void hx8357d_remove(struct spi_device *spi) |
265 | { |
266 | struct drm_device *drm = spi_get_drvdata(spi); |
267 | |
268 | drm_dev_unplug(dev: drm); |
269 | drm_atomic_helper_shutdown(dev: drm); |
270 | } |
271 | |
272 | static void hx8357d_shutdown(struct spi_device *spi) |
273 | { |
274 | drm_atomic_helper_shutdown(dev: spi_get_drvdata(spi)); |
275 | } |
276 | |
277 | static struct spi_driver hx8357d_spi_driver = { |
278 | .driver = { |
279 | .name = "hx8357d" , |
280 | .of_match_table = hx8357d_of_match, |
281 | }, |
282 | .id_table = hx8357d_id, |
283 | .probe = hx8357d_probe, |
284 | .remove = hx8357d_remove, |
285 | .shutdown = hx8357d_shutdown, |
286 | }; |
287 | module_spi_driver(hx8357d_spi_driver); |
288 | |
289 | MODULE_DESCRIPTION("HX8357D DRM driver" ); |
290 | MODULE_AUTHOR("Eric Anholt <eric@anholt.net>" ); |
291 | MODULE_LICENSE("GPL" ); |
292 | |