]> Git Repo - linux.git/blob - drivers/gpu/drm/tiny/ili9341.c
Merge tag 'linux-watchdog-6.14-rc1' of git://www.linux-watchdog.org/linux-watchdog
[linux.git] / drivers / gpu / drm / tiny / ili9341.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * DRM driver for Ilitek ILI9341 panels
4  *
5  * Copyright 2018 David Lechner <[email protected]>
6  *
7  * Based on mi0283qt.c:
8  * Copyright 2016 Noralf Trønnes
9  */
10
11 #include <linux/backlight.h>
12 #include <linux/delay.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/module.h>
15 #include <linux/property.h>
16 #include <linux/spi/spi.h>
17
18 #include <drm/clients/drm_client_setup.h>
19 #include <drm/drm_atomic_helper.h>
20 #include <drm/drm_drv.h>
21 #include <drm/drm_fbdev_dma.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 ILI9341_FRMCTR1         0xb1
30 #define ILI9341_DISCTRL         0xb6
31 #define ILI9341_ETMOD           0xb7
32
33 #define ILI9341_PWCTRL1         0xc0
34 #define ILI9341_PWCTRL2         0xc1
35 #define ILI9341_VMCTRL1         0xc5
36 #define ILI9341_VMCTRL2         0xc7
37 #define ILI9341_PWCTRLA         0xcb
38 #define ILI9341_PWCTRLB         0xcf
39
40 #define ILI9341_PGAMCTRL        0xe0
41 #define ILI9341_NGAMCTRL        0xe1
42 #define ILI9341_DTCTRLA         0xe8
43 #define ILI9341_DTCTRLB         0xea
44 #define ILI9341_PWRSEQ          0xed
45
46 #define ILI9341_EN3GAM          0xf2
47 #define ILI9341_PUMPCTRL        0xf7
48
49 #define ILI9341_MADCTL_BGR      BIT(3)
50 #define ILI9341_MADCTL_MV       BIT(5)
51 #define ILI9341_MADCTL_MX       BIT(6)
52 #define ILI9341_MADCTL_MY       BIT(7)
53
54 static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
55                              struct drm_crtc_state *crtc_state,
56                              struct drm_plane_state *plane_state)
57 {
58         struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
59         struct mipi_dbi *dbi = &dbidev->dbi;
60         u8 addr_mode;
61         int ret, idx;
62
63         if (!drm_dev_enter(pipe->crtc.dev, &idx))
64                 return;
65
66         DRM_DEBUG_KMS("\n");
67
68         ret = mipi_dbi_poweron_conditional_reset(dbidev);
69         if (ret < 0)
70                 goto out_exit;
71         if (ret == 1)
72                 goto out_enable;
73
74         mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
75
76         mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
77         mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
78         mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
79         mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
80         mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
81         mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
82
83         /* Power Control */
84         mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
85         mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
86         /* VCOM */
87         mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
88         mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);
89
90         /* Memory Access Control */
91         mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
92
93         /* Frame Rate */
94         mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
95
96         /* Gamma */
97         mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
98         mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
99         mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
100                          0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
101                          0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
102         mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
103                          0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
104                          0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
105
106         /* DDRAM */
107         mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
108
109         /* Display */
110         mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
111         mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
112         msleep(100);
113
114         mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
115         msleep(100);
116
117 out_enable:
118         switch (dbidev->rotation) {
119         default:
120                 addr_mode = ILI9341_MADCTL_MX;
121                 break;
122         case 90:
123                 addr_mode = ILI9341_MADCTL_MV;
124                 break;
125         case 180:
126                 addr_mode = ILI9341_MADCTL_MY;
127                 break;
128         case 270:
129                 addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
130                             ILI9341_MADCTL_MX;
131                 break;
132         }
133         addr_mode |= ILI9341_MADCTL_BGR;
134         mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
135         mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
136 out_exit:
137         drm_dev_exit(idx);
138 }
139
140 static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
141         DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable),
142 };
143
144 static const struct drm_display_mode yx240qv29_mode = {
145         DRM_SIMPLE_MODE(240, 320, 37, 49),
146 };
147
148 DEFINE_DRM_GEM_DMA_FOPS(ili9341_fops);
149
150 static const struct drm_driver ili9341_driver = {
151         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
152         .fops                   = &ili9341_fops,
153         DRM_GEM_DMA_DRIVER_OPS_VMAP,
154         DRM_FBDEV_DMA_DRIVER_OPS,
155         .debugfs_init           = mipi_dbi_debugfs_init,
156         .name                   = "ili9341",
157         .desc                   = "Ilitek ILI9341",
158         .major                  = 1,
159         .minor                  = 0,
160 };
161
162 static const struct of_device_id ili9341_of_match[] = {
163         { .compatible = "adafruit,yx240qv29" },
164         { }
165 };
166 MODULE_DEVICE_TABLE(of, ili9341_of_match);
167
168 static const struct spi_device_id ili9341_id[] = {
169         { "yx240qv29", 0 },
170         { }
171 };
172 MODULE_DEVICE_TABLE(spi, ili9341_id);
173
174 static int ili9341_probe(struct spi_device *spi)
175 {
176         struct device *dev = &spi->dev;
177         struct mipi_dbi_dev *dbidev;
178         struct drm_device *drm;
179         struct mipi_dbi *dbi;
180         struct gpio_desc *dc;
181         u32 rotation = 0;
182         int ret;
183
184         dbidev = devm_drm_dev_alloc(dev, &ili9341_driver,
185                                     struct mipi_dbi_dev, drm);
186         if (IS_ERR(dbidev))
187                 return PTR_ERR(dbidev);
188
189         dbi = &dbidev->dbi;
190         drm = &dbidev->drm;
191
192         dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
193         if (IS_ERR(dbi->reset))
194                 return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");
195
196         dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
197         if (IS_ERR(dc))
198                 return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n");
199
200         dbidev->backlight = devm_of_find_backlight(dev);
201         if (IS_ERR(dbidev->backlight))
202                 return PTR_ERR(dbidev->backlight);
203
204         device_property_read_u32(dev, "rotation", &rotation);
205
206         ret = mipi_dbi_spi_init(spi, dbi, dc);
207         if (ret)
208                 return ret;
209
210         ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation);
211         if (ret)
212                 return ret;
213
214         drm_mode_config_reset(drm);
215
216         ret = drm_dev_register(drm, 0);
217         if (ret)
218                 return ret;
219
220         spi_set_drvdata(spi, drm);
221
222         drm_client_setup(drm, NULL);
223
224         return 0;
225 }
226
227 static void ili9341_remove(struct spi_device *spi)
228 {
229         struct drm_device *drm = spi_get_drvdata(spi);
230
231         drm_dev_unplug(drm);
232         drm_atomic_helper_shutdown(drm);
233 }
234
235 static void ili9341_shutdown(struct spi_device *spi)
236 {
237         drm_atomic_helper_shutdown(spi_get_drvdata(spi));
238 }
239
240 static struct spi_driver ili9341_spi_driver = {
241         .driver = {
242                 .name = "ili9341",
243                 .of_match_table = ili9341_of_match,
244         },
245         .id_table = ili9341_id,
246         .probe = ili9341_probe,
247         .remove = ili9341_remove,
248         .shutdown = ili9341_shutdown,
249 };
250 module_spi_driver(ili9341_spi_driver);
251
252 MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
253 MODULE_AUTHOR("David Lechner <[email protected]>");
254 MODULE_LICENSE("GPL");
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