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15#include <linux/delay.h>
16#include <linux/dma-buf.h>
17#include <linux/gpio/consumer.h>
18#include <linux/module.h>
19#include <linux/property.h>
20#include <linux/spi/spi.h>
21#include <video/mipi_display.h>
22
23#include <drm/drm_fb_helper.h>
24#include <drm/drm_gem_framebuffer_helper.h>
25#include <drm/tinydrm/mipi-dbi.h>
26#include <drm/tinydrm/tinydrm-helpers.h>
27
28#define ILI9225_DRIVER_READ_CODE 0x00
29#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01
30#define ILI9225_LCD_AC_DRIVING_CONTROL 0x02
31#define ILI9225_ENTRY_MODE 0x03
32#define ILI9225_DISPLAY_CONTROL_1 0x07
33#define ILI9225_BLANK_PERIOD_CONTROL_1 0x08
34#define ILI9225_FRAME_CYCLE_CONTROL 0x0b
35#define ILI9225_INTERFACE_CONTROL 0x0c
36#define ILI9225_OSCILLATION_CONTROL 0x0f
37#define ILI9225_POWER_CONTROL_1 0x10
38#define ILI9225_POWER_CONTROL_2 0x11
39#define ILI9225_POWER_CONTROL_3 0x12
40#define ILI9225_POWER_CONTROL_4 0x13
41#define ILI9225_POWER_CONTROL_5 0x14
42#define ILI9225_VCI_RECYCLING 0x15
43#define ILI9225_RAM_ADDRESS_SET_1 0x20
44#define ILI9225_RAM_ADDRESS_SET_2 0x21
45#define ILI9225_WRITE_DATA_TO_GRAM 0x22
46#define ILI9225_SOFTWARE_RESET 0x28
47#define ILI9225_GATE_SCAN_CONTROL 0x30
48#define ILI9225_VERTICAL_SCROLL_1 0x31
49#define ILI9225_VERTICAL_SCROLL_2 0x32
50#define ILI9225_VERTICAL_SCROLL_3 0x33
51#define ILI9225_PARTIAL_DRIVING_POS_1 0x34
52#define ILI9225_PARTIAL_DRIVING_POS_2 0x35
53#define ILI9225_HORIZ_WINDOW_ADDR_1 0x36
54#define ILI9225_HORIZ_WINDOW_ADDR_2 0x37
55#define ILI9225_VERT_WINDOW_ADDR_1 0x38
56#define ILI9225_VERT_WINDOW_ADDR_2 0x39
57#define ILI9225_GAMMA_CONTROL_1 0x50
58#define ILI9225_GAMMA_CONTROL_2 0x51
59#define ILI9225_GAMMA_CONTROL_3 0x52
60#define ILI9225_GAMMA_CONTROL_4 0x53
61#define ILI9225_GAMMA_CONTROL_5 0x54
62#define ILI9225_GAMMA_CONTROL_6 0x55
63#define ILI9225_GAMMA_CONTROL_7 0x56
64#define ILI9225_GAMMA_CONTROL_8 0x57
65#define ILI9225_GAMMA_CONTROL_9 0x58
66#define ILI9225_GAMMA_CONTROL_10 0x59
67
68static inline int ili9225_command(struct mipi_dbi *mipi, u8 cmd, u16 data)
69{
70 u8 par[2] = { data >> 8, data & 0xff };
71
72 return mipi_dbi_command_buf(mipi, cmd, par, 2);
73}
74
75static int ili9225_fb_dirty(struct drm_framebuffer *fb,
76 struct drm_file *file_priv, unsigned int flags,
77 unsigned int color, struct drm_clip_rect *clips,
78 unsigned int num_clips)
79{
80 struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
81 struct tinydrm_device *tdev = fb->dev->dev_private;
82 struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
83 bool swap = mipi->swap_bytes;
84 struct drm_clip_rect clip;
85 u16 x_start, y_start;
86 u16 x1, x2, y1, y2;
87 int ret = 0;
88 bool full;
89 void *tr;
90
91 mutex_lock(&tdev->dirty_lock);
92
93 if (!mipi->enabled)
94 goto out_unlock;
95
96
97 if (tdev->pipe.plane.fb != fb)
98 goto out_unlock;
99
100 full = tinydrm_merge_clips(&clip, clips, num_clips, flags,
101 fb->width, fb->height);
102
103 DRM_DEBUG("Flushing [FB:%d] x1=%u, x2=%u, y1=%u, y2=%u\n", fb->base.id,
104 clip.x1, clip.x2, clip.y1, clip.y2);
105
106 if (!mipi->dc || !full || swap ||
107 fb->format->format == DRM_FORMAT_XRGB8888) {
108 tr = mipi->tx_buf;
109 ret = mipi_dbi_buf_copy(mipi->tx_buf, fb, &clip, swap);
110 if (ret)
111 goto out_unlock;
112 } else {
113 tr = cma_obj->vaddr;
114 }
115
116 switch (mipi->rotation) {
117 default:
118 x1 = clip.x1;
119 x2 = clip.x2 - 1;
120 y1 = clip.y1;
121 y2 = clip.y2 - 1;
122 x_start = x1;
123 y_start = y1;
124 break;
125 case 90:
126 x1 = clip.y1;
127 x2 = clip.y2 - 1;
128 y1 = fb->width - clip.x2;
129 y2 = fb->width - clip.x1 - 1;
130 x_start = x1;
131 y_start = y2;
132 break;
133 case 180:
134 x1 = fb->width - clip.x2;
135 x2 = fb->width - clip.x1 - 1;
136 y1 = fb->height - clip.y2;
137 y2 = fb->height - clip.y1 - 1;
138 x_start = x2;
139 y_start = y2;
140 break;
141 case 270:
142 x1 = fb->height - clip.y2;
143 x2 = fb->height - clip.y1 - 1;
144 y1 = clip.x1;
145 y2 = clip.x2 - 1;
146 x_start = x2;
147 y_start = y1;
148 break;
149 }
150
151 ili9225_command(mipi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
152 ili9225_command(mipi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
153 ili9225_command(mipi, ILI9225_VERT_WINDOW_ADDR_1, y2);
154 ili9225_command(mipi, ILI9225_VERT_WINDOW_ADDR_2, y1);
155
156 ili9225_command(mipi, ILI9225_RAM_ADDRESS_SET_1, x_start);
157 ili9225_command(mipi, ILI9225_RAM_ADDRESS_SET_2, y_start);
158
159 ret = mipi_dbi_command_buf(mipi, ILI9225_WRITE_DATA_TO_GRAM, tr,
160 (clip.x2 - clip.x1) * (clip.y2 - clip.y1) * 2);
161
162out_unlock:
163 mutex_unlock(&tdev->dirty_lock);
164
165 if (ret)
166 dev_err_once(fb->dev->dev, "Failed to update display %d\n",
167 ret);
168
169 return ret;
170}
171
172static const struct drm_framebuffer_funcs ili9225_fb_funcs = {
173 .destroy = drm_gem_fb_destroy,
174 .create_handle = drm_gem_fb_create_handle,
175 .dirty = ili9225_fb_dirty,
176};
177
178static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
179 struct drm_crtc_state *crtc_state)
180{
181 struct tinydrm_device *tdev = pipe_to_tinydrm(pipe);
182 struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
183 struct device *dev = tdev->drm->dev;
184 int ret;
185 u8 am_id;
186
187 DRM_DEBUG_KMS("\n");
188
189 mipi_dbi_hw_reset(mipi);
190
191
192
193
194
195
196
197 ret = ili9225_command(mipi, ILI9225_POWER_CONTROL_1, 0x0000);
198 if (ret) {
199 DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
200 return;
201 }
202 ili9225_command(mipi, ILI9225_POWER_CONTROL_2, 0x0000);
203 ili9225_command(mipi, ILI9225_POWER_CONTROL_3, 0x0000);
204 ili9225_command(mipi, ILI9225_POWER_CONTROL_4, 0x0000);
205 ili9225_command(mipi, ILI9225_POWER_CONTROL_5, 0x0000);
206
207 msleep(40);
208
209 ili9225_command(mipi, ILI9225_POWER_CONTROL_2, 0x0018);
210 ili9225_command(mipi, ILI9225_POWER_CONTROL_3, 0x6121);
211 ili9225_command(mipi, ILI9225_POWER_CONTROL_4, 0x006f);
212 ili9225_command(mipi, ILI9225_POWER_CONTROL_5, 0x495f);
213 ili9225_command(mipi, ILI9225_POWER_CONTROL_1, 0x0800);
214
215 msleep(10);
216
217 ili9225_command(mipi, ILI9225_POWER_CONTROL_2, 0x103b);
218
219 msleep(50);
220
221 switch (mipi->rotation) {
222 default:
223 am_id = 0x30;
224 break;
225 case 90:
226 am_id = 0x18;
227 break;
228 case 180:
229 am_id = 0x00;
230 break;
231 case 270:
232 am_id = 0x28;
233 break;
234 }
235 ili9225_command(mipi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
236 ili9225_command(mipi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
237 ili9225_command(mipi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
238 ili9225_command(mipi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
239 ili9225_command(mipi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
240 ili9225_command(mipi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
241 ili9225_command(mipi, ILI9225_INTERFACE_CONTROL, 0x0000);
242 ili9225_command(mipi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
243 ili9225_command(mipi, ILI9225_VCI_RECYCLING, 0x0020);
244 ili9225_command(mipi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
245 ili9225_command(mipi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
246
247 ili9225_command(mipi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
248 ili9225_command(mipi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
249 ili9225_command(mipi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
250 ili9225_command(mipi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
251 ili9225_command(mipi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
252 ili9225_command(mipi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
253
254 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_1, 0x0000);
255 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_2, 0x0808);
256 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_3, 0x080a);
257 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_4, 0x000a);
258 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
259 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_6, 0x0808);
260 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_7, 0x0000);
261 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
262 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_9, 0x0710);
263 ili9225_command(mipi, ILI9225_GAMMA_CONTROL_10, 0x0710);
264
265 ili9225_command(mipi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
266
267 msleep(50);
268
269 ili9225_command(mipi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
270
271 mipi_dbi_enable_flush(mipi);
272}
273
274static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
275{
276 struct tinydrm_device *tdev = pipe_to_tinydrm(pipe);
277 struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
278
279 DRM_DEBUG_KMS("\n");
280
281 if (!mipi->enabled)
282 return;
283
284 ili9225_command(mipi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
285 msleep(50);
286 ili9225_command(mipi, ILI9225_POWER_CONTROL_2, 0x0007);
287 msleep(50);
288 ili9225_command(mipi, ILI9225_POWER_CONTROL_1, 0x0a02);
289
290 mipi->enabled = false;
291}
292
293static int ili9225_dbi_command(struct mipi_dbi *mipi, u8 cmd, u8 *par,
294 size_t num)
295{
296 struct spi_device *spi = mipi->spi;
297 unsigned int bpw = 8;
298 u32 speed_hz;
299 int ret;
300
301 gpiod_set_value_cansleep(mipi->dc, 0);
302 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
303 ret = tinydrm_spi_transfer(spi, speed_hz, NULL, 8, &cmd, 1);
304 if (ret || !num)
305 return ret;
306
307 if (cmd == ILI9225_WRITE_DATA_TO_GRAM && !mipi->swap_bytes)
308 bpw = 16;
309
310 gpiod_set_value_cansleep(mipi->dc, 1);
311 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
312
313 return tinydrm_spi_transfer(spi, speed_hz, NULL, bpw, par, num);
314}
315
316static const u32 ili9225_formats[] = {
317 DRM_FORMAT_RGB565,
318 DRM_FORMAT_XRGB8888,
319};
320
321static int ili9225_init(struct device *dev, struct mipi_dbi *mipi,
322 const struct drm_simple_display_pipe_funcs *pipe_funcs,
323 struct drm_driver *driver,
324 const struct drm_display_mode *mode,
325 unsigned int rotation)
326{
327 size_t bufsize = mode->vdisplay * mode->hdisplay * sizeof(u16);
328 struct tinydrm_device *tdev = &mipi->tinydrm;
329 int ret;
330
331 if (!mipi->command)
332 return -EINVAL;
333
334 mutex_init(&mipi->cmdlock);
335
336 mipi->tx_buf = devm_kmalloc(dev, bufsize, GFP_KERNEL);
337 if (!mipi->tx_buf)
338 return -ENOMEM;
339
340 ret = devm_tinydrm_init(dev, tdev, &ili9225_fb_funcs, driver);
341 if (ret)
342 return ret;
343
344 ret = tinydrm_display_pipe_init(tdev, pipe_funcs,
345 DRM_MODE_CONNECTOR_VIRTUAL,
346 ili9225_formats,
347 ARRAY_SIZE(ili9225_formats), mode,
348 rotation);
349 if (ret)
350 return ret;
351
352 tdev->drm->mode_config.preferred_depth = 16;
353 mipi->rotation = rotation;
354
355 drm_mode_config_reset(tdev->drm);
356
357 DRM_DEBUG_KMS("preferred_depth=%u, rotation = %u\n",
358 tdev->drm->mode_config.preferred_depth, rotation);
359
360 return 0;
361}
362
363static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
364 .enable = ili9225_pipe_enable,
365 .disable = ili9225_pipe_disable,
366 .update = tinydrm_display_pipe_update,
367 .prepare_fb = tinydrm_display_pipe_prepare_fb,
368};
369
370static const struct drm_display_mode ili9225_mode = {
371 TINYDRM_MODE(176, 220, 35, 44),
372};
373
374DEFINE_DRM_GEM_CMA_FOPS(ili9225_fops);
375
376static struct drm_driver ili9225_driver = {
377 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
378 DRIVER_ATOMIC,
379 .fops = &ili9225_fops,
380 TINYDRM_GEM_DRIVER_OPS,
381 .lastclose = drm_fb_helper_lastclose,
382 .name = "ili9225",
383 .desc = "Ilitek ILI9225",
384 .date = "20171106",
385 .major = 1,
386 .minor = 0,
387};
388
389static const struct of_device_id ili9225_of_match[] = {
390 { .compatible = "vot,v220hf01a-t" },
391 {},
392};
393MODULE_DEVICE_TABLE(of, ili9225_of_match);
394
395static const struct spi_device_id ili9225_id[] = {
396 { "v220hf01a-t", 0 },
397 { },
398};
399MODULE_DEVICE_TABLE(spi, ili9225_id);
400
401static int ili9225_probe(struct spi_device *spi)
402{
403 struct device *dev = &spi->dev;
404 struct mipi_dbi *mipi;
405 struct gpio_desc *rs;
406 u32 rotation = 0;
407 int ret;
408
409 mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL);
410 if (!mipi)
411 return -ENOMEM;
412
413 mipi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
414 if (IS_ERR(mipi->reset)) {
415 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
416 return PTR_ERR(mipi->reset);
417 }
418
419 rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
420 if (IS_ERR(rs)) {
421 DRM_DEV_ERROR(dev, "Failed to get gpio 'rs'\n");
422 return PTR_ERR(rs);
423 }
424
425 device_property_read_u32(dev, "rotation", &rotation);
426
427 ret = mipi_dbi_spi_init(spi, mipi, rs);
428 if (ret)
429 return ret;
430
431
432 mipi->command = ili9225_dbi_command;
433
434 ret = ili9225_init(&spi->dev, mipi, &ili9225_pipe_funcs,
435 &ili9225_driver, &ili9225_mode, rotation);
436 if (ret)
437 return ret;
438
439 spi_set_drvdata(spi, mipi);
440
441 return devm_tinydrm_register(&mipi->tinydrm);
442}
443
444static void ili9225_shutdown(struct spi_device *spi)
445{
446 struct mipi_dbi *mipi = spi_get_drvdata(spi);
447
448 tinydrm_shutdown(&mipi->tinydrm);
449}
450
451static struct spi_driver ili9225_spi_driver = {
452 .driver = {
453 .name = "ili9225",
454 .owner = THIS_MODULE,
455 .of_match_table = ili9225_of_match,
456 },
457 .id_table = ili9225_id,
458 .probe = ili9225_probe,
459 .shutdown = ili9225_shutdown,
460};
461module_spi_driver(ili9225_spi_driver);
462
463MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
464MODULE_AUTHOR("David Lechner <david@lechnology.com>");
465MODULE_LICENSE("GPL");
466
