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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * DRM driver for Ilitek ILI9225 panels
4 *
5 * Copyright 2017 David Lechner <david@lechnology.com>
6 *
7 * Some code copied from mipi-dbi.c
8 * Copyright 2016 Noralf Trønnes
9 */
10
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_mipi_dbi.h>
28#include <drm/drm_rect.h>
29#include <drm/drm_vblank.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_crtc *crtc = &pipe->crtc;
169 struct drm_rect rect;
170
171 if (drm_atomic_helper_damage_merged(old_state, state, &rect))
172 ili9225_fb_dirty(state->fb, &rect);
173
174 if (crtc->state->event) {
175 spin_lock_irq(&crtc->dev->event_lock);
176 drm_crtc_send_vblank_event(crtc, crtc->state->event);
177 spin_unlock_irq(&crtc->dev->event_lock);
178 crtc->state->event = NULL;
179 }
180}
181
182static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
183 struct drm_crtc_state *crtc_state,
184 struct drm_plane_state *plane_state)
185{
186 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
187 struct drm_framebuffer *fb = plane_state->fb;
188 struct device *dev = pipe->crtc.dev->dev;
189 struct mipi_dbi *dbi = &dbidev->dbi;
190 struct drm_rect rect = {
191 .x1 = 0,
192 .x2 = fb->width,
193 .y1 = 0,
194 .y2 = fb->height,
195 };
196 int ret, idx;
197 u8 am_id;
198
199 if (!drm_dev_enter(pipe->crtc.dev, &idx))
200 return;
201
202 DRM_DEBUG_KMS("\n");
203
204 mipi_dbi_hw_reset(dbi);
205
206 /*
207 * There don't seem to be two example init sequences that match, so
208 * using the one from the popular Arduino library for this display.
209 * https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp
210 */
211
212 ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
213 if (ret) {
214 DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
215 goto out_exit;
216 }
217 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
218 ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
219 ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
220 ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
221
222 msleep(40);
223
224 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
225 ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
226 ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
227 ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
228 ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
229
230 msleep(10);
231
232 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
233
234 msleep(50);
235
236 switch (dbidev->rotation) {
237 default:
238 am_id = 0x30;
239 break;
240 case 90:
241 am_id = 0x18;
242 break;
243 case 180:
244 am_id = 0x00;
245 break;
246 case 270:
247 am_id = 0x28;
248 break;
249 }
250 ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
251 ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
252 ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
253 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
254 ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
255 ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
256 ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
257 ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
258 ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
259 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
260 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
261
262 ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
263 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
264 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
265 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
266 ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
267 ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
268
269 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
270 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
271 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
272 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
273 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
274 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
275 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
276 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
277 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
278 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
279
280 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
281
282 msleep(50);
283
284 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
285
286 dbidev->enabled = true;
287 ili9225_fb_dirty(fb, &rect);
288out_exit:
289 drm_dev_exit(idx);
290}
291
292static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
293{
294 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
295 struct mipi_dbi *dbi = &dbidev->dbi;
296
297 DRM_DEBUG_KMS("\n");
298
299 /*
300 * This callback is not protected by drm_dev_enter/exit since we want to
301 * turn off the display on regular driver unload. It's highly unlikely
302 * that the underlying SPI controller is gone should this be called after
303 * unplug.
304 */
305
306 if (!dbidev->enabled)
307 return;
308
309 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
310 msleep(50);
311 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
312 msleep(50);
313 ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
314
315 dbidev->enabled = false;
316}
317
318static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
319 size_t num)
320{
321 struct spi_device *spi = dbi->spi;
322 unsigned int bpw = 8;
323 u32 speed_hz;
324 int ret;
325
326 gpiod_set_value_cansleep(dbi->dc, 0);
327 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
328 ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
329 if (ret || !num)
330 return ret;
331
332 if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
333 bpw = 16;
334
335 gpiod_set_value_cansleep(dbi->dc, 1);
336 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
337
338 return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
339}
340
341static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
342 .enable = ili9225_pipe_enable,
343 .disable = ili9225_pipe_disable,
344 .update = ili9225_pipe_update,
345 .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
346};
347
348static const struct drm_display_mode ili9225_mode = {
349 DRM_SIMPLE_MODE(176, 220, 35, 44),
350};
351
352DEFINE_DRM_GEM_CMA_FOPS(ili9225_fops);
353
354static struct drm_driver ili9225_driver = {
355 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
356 .fops = &ili9225_fops,
357 .release = mipi_dbi_release,
358 DRM_GEM_CMA_VMAP_DRIVER_OPS,
359 .name = "ili9225",
360 .desc = "Ilitek ILI9225",
361 .date = "20171106",
362 .major = 1,
363 .minor = 0,
364};
365
366static const struct of_device_id ili9225_of_match[] = {
367 { .compatible = "vot,v220hf01a-t" },
368 {},
369};
370MODULE_DEVICE_TABLE(of, ili9225_of_match);
371
372static const struct spi_device_id ili9225_id[] = {
373 { "v220hf01a-t", 0 },
374 { },
375};
376MODULE_DEVICE_TABLE(spi, ili9225_id);
377
378static int ili9225_probe(struct spi_device *spi)
379{
380 struct device *dev = &spi->dev;
381 struct mipi_dbi_dev *dbidev;
382 struct drm_device *drm;
383 struct mipi_dbi *dbi;
384 struct gpio_desc *rs;
385 u32 rotation = 0;
386 int ret;
387
388 dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
389 if (!dbidev)
390 return -ENOMEM;
391
392 dbi = &dbidev->dbi;
393 drm = &dbidev->drm;
394 ret = devm_drm_dev_init(dev, drm, &ili9225_driver);
395 if (ret) {
396 kfree(dbidev);
397 return ret;
398 }
399
400 drm_mode_config_init(drm);
401
402 dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
403 if (IS_ERR(dbi->reset)) {
404 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
405 return PTR_ERR(dbi->reset);
406 }
407
408 rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
409 if (IS_ERR(rs)) {
410 DRM_DEV_ERROR(dev, "Failed to get gpio 'rs'\n");
411 return PTR_ERR(rs);
412 }
413
414 device_property_read_u32(dev, "rotation", &rotation);
415
416 ret = mipi_dbi_spi_init(spi, dbi, rs);
417 if (ret)
418 return ret;
419
420 /* override the command function set in mipi_dbi_spi_init() */
421 dbi->command = ili9225_dbi_command;
422
423 ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation);
424 if (ret)
425 return ret;
426
427 drm_mode_config_reset(drm);
428
429 ret = drm_dev_register(drm, 0);
430 if (ret)
431 return ret;
432
433 spi_set_drvdata(spi, drm);
434
435 drm_fbdev_generic_setup(drm, 0);
436
437 return 0;
438}
439
440static int ili9225_remove(struct spi_device *spi)
441{
442 struct drm_device *drm = spi_get_drvdata(spi);
443
444 drm_dev_unplug(drm);
445 drm_atomic_helper_shutdown(drm);
446
447 return 0;
448}
449
450static void ili9225_shutdown(struct spi_device *spi)
451{
452 drm_atomic_helper_shutdown(spi_get_drvdata(spi));
453}
454
455static struct spi_driver ili9225_spi_driver = {
456 .driver = {
457 .name = "ili9225",
458 .owner = THIS_MODULE,
459 .of_match_table = ili9225_of_match,
460 },
461 .id_table = ili9225_id,
462 .probe = ili9225_probe,
463 .remove = ili9225_remove,
464 .shutdown = ili9225_shutdown,
465};
466module_spi_driver(ili9225_spi_driver);
467
468MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
469MODULE_AUTHOR("David Lechner <david@lechnology.com>");
470MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * DRM driver for Ilitek ILI9225 panels
4 *
5 * Copyright 2017 David Lechner <david@lechnology.com>
6 *
7 * Some code copied from mipi-dbi.c
8 * Copyright 2016 Noralf Trønnes
9 */
10
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_dma_helper.h>
23#include <drm/drm_fbdev_generic.h>
24#include <drm/drm_fourcc.h>
25#include <drm/drm_framebuffer.h>
26#include <drm/drm_gem_atomic_helper.h>
27#include <drm/drm_gem_dma_helper.h>
28#include <drm/drm_managed.h>
29#include <drm/drm_mipi_dbi.h>
30#include <drm/drm_rect.h>
31
32#define ILI9225_DRIVER_READ_CODE 0x00
33#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01
34#define ILI9225_LCD_AC_DRIVING_CONTROL 0x02
35#define ILI9225_ENTRY_MODE 0x03
36#define ILI9225_DISPLAY_CONTROL_1 0x07
37#define ILI9225_BLANK_PERIOD_CONTROL_1 0x08
38#define ILI9225_FRAME_CYCLE_CONTROL 0x0b
39#define ILI9225_INTERFACE_CONTROL 0x0c
40#define ILI9225_OSCILLATION_CONTROL 0x0f
41#define ILI9225_POWER_CONTROL_1 0x10
42#define ILI9225_POWER_CONTROL_2 0x11
43#define ILI9225_POWER_CONTROL_3 0x12
44#define ILI9225_POWER_CONTROL_4 0x13
45#define ILI9225_POWER_CONTROL_5 0x14
46#define ILI9225_VCI_RECYCLING 0x15
47#define ILI9225_RAM_ADDRESS_SET_1 0x20
48#define ILI9225_RAM_ADDRESS_SET_2 0x21
49#define ILI9225_WRITE_DATA_TO_GRAM 0x22
50#define ILI9225_SOFTWARE_RESET 0x28
51#define ILI9225_GATE_SCAN_CONTROL 0x30
52#define ILI9225_VERTICAL_SCROLL_1 0x31
53#define ILI9225_VERTICAL_SCROLL_2 0x32
54#define ILI9225_VERTICAL_SCROLL_3 0x33
55#define ILI9225_PARTIAL_DRIVING_POS_1 0x34
56#define ILI9225_PARTIAL_DRIVING_POS_2 0x35
57#define ILI9225_HORIZ_WINDOW_ADDR_1 0x36
58#define ILI9225_HORIZ_WINDOW_ADDR_2 0x37
59#define ILI9225_VERT_WINDOW_ADDR_1 0x38
60#define ILI9225_VERT_WINDOW_ADDR_2 0x39
61#define ILI9225_GAMMA_CONTROL_1 0x50
62#define ILI9225_GAMMA_CONTROL_2 0x51
63#define ILI9225_GAMMA_CONTROL_3 0x52
64#define ILI9225_GAMMA_CONTROL_4 0x53
65#define ILI9225_GAMMA_CONTROL_5 0x54
66#define ILI9225_GAMMA_CONTROL_6 0x55
67#define ILI9225_GAMMA_CONTROL_7 0x56
68#define ILI9225_GAMMA_CONTROL_8 0x57
69#define ILI9225_GAMMA_CONTROL_9 0x58
70#define ILI9225_GAMMA_CONTROL_10 0x59
71
72static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data)
73{
74 u8 par[2] = { data >> 8, data & 0xff };
75
76 return mipi_dbi_command_buf(dbi, cmd, par, 2);
77}
78
79static void ili9225_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
80{
81 struct drm_gem_dma_object *dma_obj = drm_fb_dma_get_gem_obj(fb, 0);
82 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
83 unsigned int height = rect->y2 - rect->y1;
84 unsigned int width = rect->x2 - rect->x1;
85 struct mipi_dbi *dbi = &dbidev->dbi;
86 bool swap = dbi->swap_bytes;
87 u16 x_start, y_start;
88 u16 x1, x2, y1, y2;
89 int idx, ret = 0;
90 bool full;
91 void *tr;
92
93 if (!drm_dev_enter(fb->dev, &idx))
94 return;
95
96 full = width == fb->width && height == fb->height;
97
98 DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
99
100 if (!dbi->dc || !full || swap ||
101 fb->format->format == DRM_FORMAT_XRGB8888) {
102 tr = dbidev->tx_buf;
103 ret = mipi_dbi_buf_copy(dbidev->tx_buf, fb, rect, swap);
104 if (ret)
105 goto err_msg;
106 } else {
107 tr = dma_obj->vaddr;
108 }
109
110 switch (dbidev->rotation) {
111 default:
112 x1 = rect->x1;
113 x2 = rect->x2 - 1;
114 y1 = rect->y1;
115 y2 = rect->y2 - 1;
116 x_start = x1;
117 y_start = y1;
118 break;
119 case 90:
120 x1 = rect->y1;
121 x2 = rect->y2 - 1;
122 y1 = fb->width - rect->x2;
123 y2 = fb->width - rect->x1 - 1;
124 x_start = x1;
125 y_start = y2;
126 break;
127 case 180:
128 x1 = fb->width - rect->x2;
129 x2 = fb->width - rect->x1 - 1;
130 y1 = fb->height - rect->y2;
131 y2 = fb->height - rect->y1 - 1;
132 x_start = x2;
133 y_start = y2;
134 break;
135 case 270:
136 x1 = fb->height - rect->y2;
137 x2 = fb->height - rect->y1 - 1;
138 y1 = rect->x1;
139 y2 = rect->x2 - 1;
140 x_start = x2;
141 y_start = y1;
142 break;
143 }
144
145 ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
146 ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
147 ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2);
148 ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1);
149
150 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start);
151 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start);
152
153 ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr,
154 width * height * 2);
155err_msg:
156 if (ret)
157 dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
158
159 drm_dev_exit(idx);
160}
161
162static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
163 struct drm_plane_state *old_state)
164{
165 struct drm_plane_state *state = pipe->plane.state;
166 struct drm_rect rect;
167
168 if (!pipe->crtc.state->active)
169 return;
170
171 if (drm_atomic_helper_damage_merged(old_state, state, &rect))
172 ili9225_fb_dirty(state->fb, &rect);
173}
174
175static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
176 struct drm_crtc_state *crtc_state,
177 struct drm_plane_state *plane_state)
178{
179 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
180 struct drm_framebuffer *fb = plane_state->fb;
181 struct device *dev = pipe->crtc.dev->dev;
182 struct mipi_dbi *dbi = &dbidev->dbi;
183 struct drm_rect rect = {
184 .x1 = 0,
185 .x2 = fb->width,
186 .y1 = 0,
187 .y2 = fb->height,
188 };
189 int ret, idx;
190 u8 am_id;
191
192 if (!drm_dev_enter(pipe->crtc.dev, &idx))
193 return;
194
195 DRM_DEBUG_KMS("\n");
196
197 mipi_dbi_hw_reset(dbi);
198
199 /*
200 * There don't seem to be two example init sequences that match, so
201 * using the one from the popular Arduino library for this display.
202 * https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp
203 */
204
205 ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
206 if (ret) {
207 DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
208 goto out_exit;
209 }
210 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
211 ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
212 ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
213 ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
214
215 msleep(40);
216
217 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
218 ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
219 ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
220 ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
221 ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
222
223 msleep(10);
224
225 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
226
227 msleep(50);
228
229 switch (dbidev->rotation) {
230 default:
231 am_id = 0x30;
232 break;
233 case 90:
234 am_id = 0x18;
235 break;
236 case 180:
237 am_id = 0x00;
238 break;
239 case 270:
240 am_id = 0x28;
241 break;
242 }
243 ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
244 ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
245 ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
246 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
247 ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
248 ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
249 ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
250 ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
251 ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
252 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
253 ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
254
255 ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
256 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
257 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
258 ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
259 ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
260 ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
261
262 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
263 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
264 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
265 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
266 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
267 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
268 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
269 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
270 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
271 ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
272
273 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
274
275 msleep(50);
276
277 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
278
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 * This callback is not protected by drm_dev_enter/exit since we want to
293 * turn off the display on regular driver unload. It's highly unlikely
294 * that the underlying SPI controller is gone should this be called after
295 * unplug.
296 */
297
298 ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
299 msleep(50);
300 ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
301 msleep(50);
302 ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
303}
304
305static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
306 size_t num)
307{
308 struct spi_device *spi = dbi->spi;
309 unsigned int bpw = 8;
310 u32 speed_hz;
311 int ret;
312
313 gpiod_set_value_cansleep(dbi->dc, 0);
314 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
315 ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
316 if (ret || !num)
317 return ret;
318
319 if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
320 bpw = 16;
321
322 gpiod_set_value_cansleep(dbi->dc, 1);
323 speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
324
325 return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
326}
327
328static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
329 .enable = ili9225_pipe_enable,
330 .disable = ili9225_pipe_disable,
331 .update = ili9225_pipe_update,
332};
333
334static const struct drm_display_mode ili9225_mode = {
335 DRM_SIMPLE_MODE(176, 220, 35, 44),
336};
337
338DEFINE_DRM_GEM_DMA_FOPS(ili9225_fops);
339
340static const struct drm_driver ili9225_driver = {
341 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
342 .fops = &ili9225_fops,
343 DRM_GEM_DMA_DRIVER_OPS_VMAP,
344 .name = "ili9225",
345 .desc = "Ilitek ILI9225",
346 .date = "20171106",
347 .major = 1,
348 .minor = 0,
349};
350
351static const struct of_device_id ili9225_of_match[] = {
352 { .compatible = "vot,v220hf01a-t" },
353 {},
354};
355MODULE_DEVICE_TABLE(of, ili9225_of_match);
356
357static const struct spi_device_id ili9225_id[] = {
358 { "v220hf01a-t", 0 },
359 { },
360};
361MODULE_DEVICE_TABLE(spi, ili9225_id);
362
363static int ili9225_probe(struct spi_device *spi)
364{
365 struct device *dev = &spi->dev;
366 struct mipi_dbi_dev *dbidev;
367 struct drm_device *drm;
368 struct mipi_dbi *dbi;
369 struct gpio_desc *rs;
370 u32 rotation = 0;
371 int ret;
372
373 dbidev = devm_drm_dev_alloc(dev, &ili9225_driver,
374 struct mipi_dbi_dev, drm);
375 if (IS_ERR(dbidev))
376 return PTR_ERR(dbidev);
377
378 dbi = &dbidev->dbi;
379 drm = &dbidev->drm;
380
381 dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
382 if (IS_ERR(dbi->reset))
383 return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");
384
385 rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
386 if (IS_ERR(rs))
387 return dev_err_probe(dev, PTR_ERR(rs), "Failed to get GPIO 'rs'\n");
388
389 device_property_read_u32(dev, "rotation", &rotation);
390
391 ret = mipi_dbi_spi_init(spi, dbi, rs);
392 if (ret)
393 return ret;
394
395 /* override the command function set in mipi_dbi_spi_init() */
396 dbi->command = ili9225_dbi_command;
397
398 ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation);
399 if (ret)
400 return ret;
401
402 drm_mode_config_reset(drm);
403
404 ret = drm_dev_register(drm, 0);
405 if (ret)
406 return ret;
407
408 spi_set_drvdata(spi, drm);
409
410 drm_fbdev_generic_setup(drm, 0);
411
412 return 0;
413}
414
415static void ili9225_remove(struct spi_device *spi)
416{
417 struct drm_device *drm = spi_get_drvdata(spi);
418
419 drm_dev_unplug(drm);
420 drm_atomic_helper_shutdown(drm);
421}
422
423static void ili9225_shutdown(struct spi_device *spi)
424{
425 drm_atomic_helper_shutdown(spi_get_drvdata(spi));
426}
427
428static struct spi_driver ili9225_spi_driver = {
429 .driver = {
430 .name = "ili9225",
431 .owner = THIS_MODULE,
432 .of_match_table = ili9225_of_match,
433 },
434 .id_table = ili9225_id,
435 .probe = ili9225_probe,
436 .remove = ili9225_remove,
437 .shutdown = ili9225_shutdown,
438};
439module_spi_driver(ili9225_spi_driver);
440
441MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
442MODULE_AUTHOR("David Lechner <david@lechnology.com>");
443MODULE_LICENSE("GPL");