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11#include <linux/delay.h>
12#include <linux/dma-buf.h>
13#include <linux/gpio/consumer.h>
14#include <linux/module.h>
15#include <linux/property.h>
16#include <linux/spi/spi.h>
17#include <video/mipi_display.h>
18
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_damage_helper.h>
21#include <drm/drm_drv.h>
22#include <drm/drm_fb_cma_helper.h>
23#include <drm/drm_fb_helper.h>
24#include <drm/drm_fourcc.h>
25#include <drm/drm_gem_cma_helper.h>
26#include <drm/drm_gem_framebuffer_helper.h>
27#include <drm/drm_managed.h>
28#include <drm/drm_mipi_dbi.h>
29#include <drm/drm_rect.h>
30
31#define ILI9225_DRIVER_READ_CODE 0x00
32#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01
33#define ILI9225_LCD_AC_DRIVING_CONTROL 0x02
34#define ILI9225_ENTRY_MODE 0x03
35#define ILI9225_DISPLAY_CONTROL_1 0x07
36#define ILI9225_BLANK_PERIOD_CONTROL_1 0x08
37#define ILI9225_FRAME_CYCLE_CONTROL 0x0b
38#define ILI9225_INTERFACE_CONTROL 0x0c
39#define ILI9225_OSCILLATION_CONTROL 0x0f
40#define ILI9225_POWER_CONTROL_1 0x10
41#define ILI9225_POWER_CONTROL_2 0x11
42#define ILI9225_POWER_CONTROL_3 0x12
43#define ILI9225_POWER_CONTROL_4 0x13
44#define ILI9225_POWER_CONTROL_5 0x14
45#define ILI9225_VCI_RECYCLING 0x15
46#define ILI9225_RAM_ADDRESS_SET_1 0x20
47#define ILI9225_RAM_ADDRESS_SET_2 0x21
48#define ILI9225_WRITE_DATA_TO_GRAM 0x22
49#define ILI9225_SOFTWARE_RESET 0x28
50#define ILI9225_GATE_SCAN_CONTROL 0x30
51#define ILI9225_VERTICAL_SCROLL_1 0x31
52#define ILI9225_VERTICAL_SCROLL_2 0x32
53#define ILI9225_VERTICAL_SCROLL_3 0x33
54#define ILI9225_PARTIAL_DRIVING_POS_1 0x34
55#define ILI9225_PARTIAL_DRIVING_POS_2 0x35
56#define ILI9225_HORIZ_WINDOW_ADDR_1 0x36
57#define ILI9225_HORIZ_WINDOW_ADDR_2 0x37
58#define ILI9225_VERT_WINDOW_ADDR_1 0x38
59#define ILI9225_VERT_WINDOW_ADDR_2 0x39
60#define ILI9225_GAMMA_CONTROL_1 0x50
61#define ILI9225_GAMMA_CONTROL_2 0x51
62#define ILI9225_GAMMA_CONTROL_3 0x52
63#define ILI9225_GAMMA_CONTROL_4 0x53
64#define ILI9225_GAMMA_CONTROL_5 0x54
65#define ILI9225_GAMMA_CONTROL_6 0x55
66#define ILI9225_GAMMA_CONTROL_7 0x56
67#define ILI9225_GAMMA_CONTROL_8 0x57
68#define ILI9225_GAMMA_CONTROL_9 0x58
69#define ILI9225_GAMMA_CONTROL_10 0x59
70
71static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data)
72{
73 u8 par[2] = { data >> 8, data & 0xff };
74
75 return mipi_dbi_command_buf(dbi, cmd, par, 2);
76}
77
78static void ili9225_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
79{
80 struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
81 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
82 unsigned int height = rect->y2 - rect->y1;
83 unsigned int width = rect->x2 - rect->x1;
84 struct mipi_dbi *dbi = &dbidev->dbi;
85 bool swap = dbi->swap_bytes;
86 u16 x_start, y_start;
87 u16 x1, x2, y1, y2;
88 int idx, ret = 0;
89 bool full;
90 void *tr;
91
92 if (!dbidev->enabled)
93 return;
94
95 if (!drm_dev_enter(fb->dev, &idx))
96 return;
97
98 full = width == fb->width && height == fb->height;
99
100 DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
101
102 if (!dbi->dc || !full || swap ||
103 fb->format->format == DRM_FORMAT_XRGB8888) {
104 tr = dbidev->tx_buf;
105 ret = mipi_dbi_buf_copy(dbidev->tx_buf, fb, rect, swap);
106 if (ret)
107 goto err_msg;
108 } else {
109 tr = cma_obj->vaddr;
110 }
111
112 switch (dbidev->rotation) {
113 default:
114 x1 = rect->x1;
115 x2 = rect->x2 - 1;
116 y1 = rect->y1;
117 y2 = rect->y2 - 1;
118 x_start = x1;
119 y_start = y1;
120 break;
121 case 90:
122 x1 = rect->y1;
123 x2 = rect->y2 - 1;
124 y1 = fb->width - rect->x2;
125 y2 = fb->width - rect->x1 - 1;
126 x_start = x1;
127 y_start = y2;
128 break;
129 case 180:
130 x1 = fb->width - rect->x2;
131 x2 = fb->width - rect->x1 - 1;
132 y1 = fb->height - rect->y2;
133 y2 = fb->height - rect->y1 - 1;
134 x_start = x2;
135 y_start = y2;
136 break;
137 case 270:
138 x1 = fb->height - rect->y2;
139 x2 = fb->height - rect->y1 - 1;
140 y1 = rect->x1;
141 y2 = rect->x2 - 1;
142 x_start = x2;
143 y_start = y1;
144 break;
145 }
146
147 ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
148 ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
149 ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2);
150 ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1);
151
152 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start);
153 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start);
154
155 ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr,
156 width * height * 2);
157err_msg:
158 if (ret)
159 dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
160
161 drm_dev_exit(idx);
162}
163
164static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
165 struct drm_plane_state *old_state)
166{
167 struct drm_plane_state *state = pipe->plane.state;
168 struct drm_rect rect;
169
170 if (drm_atomic_helper_damage_merged(old_state, state, &rect))
171 ili9225_fb_dirty(state->fb, &rect);
172}
173
174static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
175 struct drm_crtc_state *crtc_state,
176 struct drm_plane_state *plane_state)
177{
178 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
179 struct drm_framebuffer *fb = plane_state->fb;
180 struct device *dev = pipe->crtc.dev->dev;
181 struct mipi_dbi *dbi = &dbidev->dbi;
182 struct drm_rect rect = {
183 .x1 = 0,
184 .x2 = fb->width,
185 .y1 = 0,
186 .y2 = fb->height,
187 };
188 int ret, idx;
189 u8 am_id;
190
191 if (!drm_dev_enter(pipe->crtc.dev, &idx))
192 return;
193
194 DRM_DEBUG_KMS("\n");
195
196 mipi_dbi_hw_reset(dbi);
197
198
199
200
201
202
203
204 ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
205 if (ret) {
206 DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
207 goto out_exit;
208 }
209 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
210 ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
211 ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
212 ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
213
214 msleep(40);
215
216 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
217 ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
218 ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
219 ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
220 ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
221
222 msleep(10);
223
224 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
225
226 msleep(50);
227
228 switch (dbidev->rotation) {
229 default:
230 am_id = 0x30;
231 break;
232 case 90:
233 am_id = 0x18;
234 break;
235 case 180:
236 am_id = 0x00;
237 break;
238 case 270:
239 am_id = 0x28;
240 break;
241 }
242 ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
243 ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
244 ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
245 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
246 ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
247 ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
248 ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
249 ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
250 ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
251 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
252 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
253
254 ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
255 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
256 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
257 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
258 ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
259 ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
260
261 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
262 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
263 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
264 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
265 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
266 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
267 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
268 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
269 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
270 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
271
272 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
273
274 msleep(50);
275
276 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
277
278 dbidev->enabled = true;
279 ili9225_fb_dirty(fb, &rect);
280out_exit:
281 drm_dev_exit(idx);
282}
283
284static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
285{
286 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
287 struct mipi_dbi *dbi = &dbidev->dbi;
288
289 DRM_DEBUG_KMS("\n");
290
291
292
293
294
295
296
297
298 if (!dbidev->enabled)
299 return;
300
301 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
302 msleep(50);
303 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
304 msleep(50);
305 ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
306
307 dbidev->enabled = false;
308}
309
310static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
311 size_t num)
312{
313 struct spi_device *spi = dbi->spi;
314 unsigned int bpw = 8;
315 u32 speed_hz;
316 int ret;
317
318 gpiod_set_value_cansleep(dbi->dc, 0);
319 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
320 ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
321 if (ret || !num)
322 return ret;
323
324 if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
325 bpw = 16;
326
327 gpiod_set_value_cansleep(dbi->dc, 1);
328 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
329
330 return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
331}
332
333static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
334 .enable = ili9225_pipe_enable,
335 .disable = ili9225_pipe_disable,
336 .update = ili9225_pipe_update,
337 .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
338};
339
340static const struct drm_display_mode ili9225_mode = {
341 DRM_SIMPLE_MODE(176, 220, 35, 44),
342};
343
344DEFINE_DRM_GEM_CMA_FOPS(ili9225_fops);
345
346static struct drm_driver ili9225_driver = {
347 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
348 .fops = &ili9225_fops,
349 DRM_GEM_CMA_VMAP_DRIVER_OPS,
350 .name = "ili9225",
351 .desc = "Ilitek ILI9225",
352 .date = "20171106",
353 .major = 1,
354 .minor = 0,
355};
356
357static const struct of_device_id ili9225_of_match[] = {
358 { .compatible = "vot,v220hf01a-t" },
359 {},
360};
361MODULE_DEVICE_TABLE(of, ili9225_of_match);
362
363static const struct spi_device_id ili9225_id[] = {
364 { "v220hf01a-t", 0 },
365 { },
366};
367MODULE_DEVICE_TABLE(spi, ili9225_id);
368
369static int ili9225_probe(struct spi_device *spi)
370{
371 struct device *dev = &spi->dev;
372 struct mipi_dbi_dev *dbidev;
373 struct drm_device *drm;
374 struct mipi_dbi *dbi;
375 struct gpio_desc *rs;
376 u32 rotation = 0;
377 int ret;
378
379 dbidev = devm_drm_dev_alloc(dev, &ili9225_driver,
380 struct mipi_dbi_dev, drm);
381 if (IS_ERR(dbidev))
382 return PTR_ERR(dbidev);
383
384 dbi = &dbidev->dbi;
385 drm = &dbidev->drm;
386
387 dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
388 if (IS_ERR(dbi->reset)) {
389 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
390 return PTR_ERR(dbi->reset);
391 }
392
393 rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
394 if (IS_ERR(rs)) {
395 DRM_DEV_ERROR(dev, "Failed to get gpio 'rs'\n");
396 return PTR_ERR(rs);
397 }
398
399 device_property_read_u32(dev, "rotation", &rotation);
400
401 ret = mipi_dbi_spi_init(spi, dbi, rs);
402 if (ret)
403 return ret;
404
405
406 dbi->command = ili9225_dbi_command;
407
408 ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation);
409 if (ret)
410 return ret;
411
412 drm_mode_config_reset(drm);
413
414 ret = drm_dev_register(drm, 0);
415 if (ret)
416 return ret;
417
418 spi_set_drvdata(spi, drm);
419
420 drm_fbdev_generic_setup(drm, 0);
421
422 return 0;
423}
424
425static int ili9225_remove(struct spi_device *spi)
426{
427 struct drm_device *drm = spi_get_drvdata(spi);
428
429 drm_dev_unplug(drm);
430 drm_atomic_helper_shutdown(drm);
431
432 return 0;
433}
434
435static void ili9225_shutdown(struct spi_device *spi)
436{
437 drm_atomic_helper_shutdown(spi_get_drvdata(spi));
438}
439
440static struct spi_driver ili9225_spi_driver = {
441 .driver = {
442 .name = "ili9225",
443 .owner = THIS_MODULE,
444 .of_match_table = ili9225_of_match,
445 },
446 .id_table = ili9225_id,
447 .probe = ili9225_probe,
448 .remove = ili9225_remove,
449 .shutdown = ili9225_shutdown,
450};
451module_spi_driver(ili9225_spi_driver);
452
453MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
454MODULE_AUTHOR("David Lechner <david@lechnology.com>");
455MODULE_LICENSE("GPL");
456
