Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0+
2
3#include <linux/backlight.h>
4#include <linux/delay.h>
5#include <linux/gpio/consumer.h>
6#include <linux/module.h>
7#include <linux/property.h>
8#include <linux/spi/spi.h>
9
10#include <drm/clients/drm_client_setup.h>
11#include <drm/drm_atomic_helper.h>
12#include <drm/drm_drv.h>
13#include <drm/drm_fbdev_dma.h>
14#include <drm/drm_gem_atomic_helper.h>
15#include <drm/drm_gem_dma_helper.h>
16#include <drm/drm_mipi_dbi.h>
17#include <drm/drm_modeset_helper.h>
18#include <drm/drm_print.h>
19
20#include <video/mipi_display.h>
21
22#define ILI9163_FRMCTR1 0xb1
23
24#define ILI9163_PWCTRL1 0xc0
25#define ILI9163_PWCTRL2 0xc1
26#define ILI9163_VMCTRL1 0xc5
27#define ILI9163_VMCTRL2 0xc7
28#define ILI9163_PWCTRLA 0xcb
29#define ILI9163_PWCTRLB 0xcf
30
31#define ILI9163_EN3GAM 0xf2
32
33#define ILI9163_MADCTL_BGR BIT(3)
34#define ILI9163_MADCTL_MV BIT(5)
35#define ILI9163_MADCTL_MX BIT(6)
36#define ILI9163_MADCTL_MY BIT(7)
37
38static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
39 struct drm_crtc_state *crtc_state,
40 struct drm_plane_state *plane_state)
41{
42 struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
43 struct mipi_dbi *dbi = &dbidev->dbi;
44 u8 addr_mode;
45 int ret, idx;
46
47 if (!drm_dev_enter(pipe->crtc.dev, &idx))
48 return;
49
50 DRM_DEBUG_KMS("\n");
51
52 ret = mipi_dbi_poweron_conditional_reset(dbidev);
53 if (ret < 0)
54 goto out_exit;
55 if (ret == 1)
56 goto out_enable;
57
58 /* Gamma */
59 mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x04);
60 mipi_dbi_command(dbi, ILI9163_EN3GAM, 0x00);
61
62 /* Frame Rate */
63 mipi_dbi_command(dbi, ILI9163_FRMCTR1, 0x0a, 0x14);
64
65 /* Power Control */
66 mipi_dbi_command(dbi, ILI9163_PWCTRL1, 0x0a, 0x00);
67 mipi_dbi_command(dbi, ILI9163_PWCTRL2, 0x02);
68
69 /* VCOM */
70 mipi_dbi_command(dbi, ILI9163_VMCTRL1, 0x2f, 0x3e);
71 mipi_dbi_command(dbi, ILI9163_VMCTRL2, 0x40);
72
73 /* Memory Access Control */
74 mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
75
76 mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
77 msleep(100);
78
79 mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
80 msleep(100);
81
82out_enable:
83 switch (dbidev->rotation) {
84 default:
85 addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MY;
86 break;
87 case 90:
88 addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MV;
89 break;
90 case 180:
91 addr_mode = 0;
92 break;
93 case 270:
94 addr_mode = ILI9163_MADCTL_MY | ILI9163_MADCTL_MV;
95 break;
96 }
97 addr_mode |= ILI9163_MADCTL_BGR;
98 mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
99 mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
100out_exit:
101 drm_dev_exit(idx);
102}
103
104static const struct drm_simple_display_pipe_funcs ili9163_pipe_funcs = {
105 DRM_MIPI_DBI_SIMPLE_DISPLAY_PIPE_FUNCS(yx240qv29_enable),
106};
107
108static const struct drm_display_mode yx240qv29_mode = {
109 DRM_SIMPLE_MODE(128, 160, 28, 35),
110};
111
112DEFINE_DRM_GEM_DMA_FOPS(ili9163_fops);
113
114static struct drm_driver ili9163_driver = {
115 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
116 .fops = &ili9163_fops,
117 DRM_GEM_DMA_DRIVER_OPS_VMAP,
118 DRM_FBDEV_DMA_DRIVER_OPS,
119 .debugfs_init = mipi_dbi_debugfs_init,
120 .name = "ili9163",
121 .desc = "Ilitek ILI9163",
122 .major = 1,
123 .minor = 0,
124};
125
126static const struct of_device_id ili9163_of_match[] = {
127 { .compatible = "newhaven,1.8-128160EF" },
128 { }
129};
130MODULE_DEVICE_TABLE(of, ili9163_of_match);
131
132static const struct spi_device_id ili9163_id[] = {
133 { "nhd-1.8-128160EF", 0 },
134 { }
135};
136MODULE_DEVICE_TABLE(spi, ili9163_id);
137
138static int ili9163_probe(struct spi_device *spi)
139{
140 struct device *dev = &spi->dev;
141 struct mipi_dbi_dev *dbidev;
142 struct drm_device *drm;
143 struct mipi_dbi *dbi;
144 struct gpio_desc *dc;
145 u32 rotation = 0;
146 int ret;
147
148 dbidev = devm_drm_dev_alloc(dev, &ili9163_driver,
149 struct mipi_dbi_dev, drm);
150 if (IS_ERR(dbidev))
151 return PTR_ERR(dbidev);
152
153 dbi = &dbidev->dbi;
154 drm = &dbidev->drm;
155
156 spi_set_drvdata(spi, drm);
157
158 dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
159 if (IS_ERR(dbi->reset)) {
160 DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
161 return PTR_ERR(dbi->reset);
162 }
163
164 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
165 if (IS_ERR(dc)) {
166 DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
167 return PTR_ERR(dc);
168 }
169
170 dbidev->backlight = devm_of_find_backlight(dev);
171 if (IS_ERR(dbidev->backlight))
172 return PTR_ERR(dbidev->backlight);
173
174 device_property_read_u32(dev, "rotation", &rotation);
175
176 ret = mipi_dbi_spi_init(spi, dbi, dc);
177 if (ret)
178 return ret;
179
180 ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation);
181 if (ret)
182 return ret;
183
184 drm_mode_config_reset(drm);
185
186 ret = drm_dev_register(drm, 0);
187 if (ret)
188 return ret;
189
190 drm_client_setup(drm, NULL);
191
192 return 0;
193}
194
195static void ili9163_remove(struct spi_device *spi)
196{
197 struct drm_device *drm = spi_get_drvdata(spi);
198
199 drm_dev_unplug(drm);
200 drm_atomic_helper_shutdown(drm);
201}
202
203static void ili9163_shutdown(struct spi_device *spi)
204{
205 drm_atomic_helper_shutdown(spi_get_drvdata(spi));
206}
207
208static struct spi_driver ili9163_spi_driver = {
209 .driver = {
210 .name = "ili9163",
211 .of_match_table = ili9163_of_match,
212 },
213 .id_table = ili9163_id,
214 .probe = ili9163_probe,
215 .remove = ili9163_remove,
216 .shutdown = ili9163_shutdown,
217};
218module_spi_driver(ili9163_spi_driver);
219
220MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver");
221MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>");
222MODULE_LICENSE("GPL");