1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * DRM driver for Multi-Inno MI0283QT panels
5 * Copyright 2016 Noralf Trønnes
8 #include <linux/backlight.h>
9 #include <linux/delay.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/module.h>
12 #include <linux/property.h>
13 #include <linux/regulator/consumer.h>
14 #include <linux/spi/spi.h>
16 #include <drm/drm_atomic_helper.h>
17 #include <drm/drm_drv.h>
18 #include <drm/drm_fb_helper.h>
19 #include <drm/drm_gem_cma_helper.h>
20 #include <drm/drm_gem_framebuffer_helper.h>
21 #include <drm/drm_modeset_helper.h>
22 #include <drm/tinydrm/mipi-dbi.h>
23 #include <drm/tinydrm/tinydrm-helpers.h>
24 #include <video/mipi_display.h>
26 #define ILI9341_FRMCTR1 0xb1
27 #define ILI9341_DISCTRL 0xb6
28 #define ILI9341_ETMOD 0xb7
30 #define ILI9341_PWCTRL1 0xc0
31 #define ILI9341_PWCTRL2 0xc1
32 #define ILI9341_VMCTRL1 0xc5
33 #define ILI9341_VMCTRL2 0xc7
34 #define ILI9341_PWCTRLA 0xcb
35 #define ILI9341_PWCTRLB 0xcf
37 #define ILI9341_PGAMCTRL 0xe0
38 #define ILI9341_NGAMCTRL 0xe1
39 #define ILI9341_DTCTRLA 0xe8
40 #define ILI9341_DTCTRLB 0xea
41 #define ILI9341_PWRSEQ 0xed
43 #define ILI9341_EN3GAM 0xf2
44 #define ILI9341_PUMPCTRL 0xf7
46 #define ILI9341_MADCTL_BGR BIT(3)
47 #define ILI9341_MADCTL_MV BIT(5)
48 #define ILI9341_MADCTL_MX BIT(6)
49 #define ILI9341_MADCTL_MY BIT(7)
51 static void mi0283qt_enable(struct drm_simple_display_pipe
*pipe
,
52 struct drm_crtc_state
*crtc_state
,
53 struct drm_plane_state
*plane_state
)
55 struct mipi_dbi
*mipi
= drm_to_mipi_dbi(pipe
->crtc
.dev
);
59 if (!drm_dev_enter(pipe
->crtc
.dev
, &idx
))
64 ret
= mipi_dbi_poweron_conditional_reset(mipi
);
70 mipi_dbi_command(mipi
, MIPI_DCS_SET_DISPLAY_OFF
);
72 mipi_dbi_command(mipi
, ILI9341_PWCTRLB
, 0x00, 0x83, 0x30);
73 mipi_dbi_command(mipi
, ILI9341_PWRSEQ
, 0x64, 0x03, 0x12, 0x81);
74 mipi_dbi_command(mipi
, ILI9341_DTCTRLA
, 0x85, 0x01, 0x79);
75 mipi_dbi_command(mipi
, ILI9341_PWCTRLA
, 0x39, 0x2c, 0x00, 0x34, 0x02);
76 mipi_dbi_command(mipi
, ILI9341_PUMPCTRL
, 0x20);
77 mipi_dbi_command(mipi
, ILI9341_DTCTRLB
, 0x00, 0x00);
80 mipi_dbi_command(mipi
, ILI9341_PWCTRL1
, 0x26);
81 mipi_dbi_command(mipi
, ILI9341_PWCTRL2
, 0x11);
83 mipi_dbi_command(mipi
, ILI9341_VMCTRL1
, 0x35, 0x3e);
84 mipi_dbi_command(mipi
, ILI9341_VMCTRL2
, 0xbe);
86 /* Memory Access Control */
87 mipi_dbi_command(mipi
, MIPI_DCS_SET_PIXEL_FORMAT
, MIPI_DCS_PIXEL_FMT_16BIT
);
90 mipi_dbi_command(mipi
, ILI9341_FRMCTR1
, 0x00, 0x1b);
93 mipi_dbi_command(mipi
, ILI9341_EN3GAM
, 0x08);
94 mipi_dbi_command(mipi
, MIPI_DCS_SET_GAMMA_CURVE
, 0x01);
95 mipi_dbi_command(mipi
, ILI9341_PGAMCTRL
,
96 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87,
97 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00);
98 mipi_dbi_command(mipi
, ILI9341_NGAMCTRL
,
99 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78,
100 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f);
103 mipi_dbi_command(mipi
, ILI9341_ETMOD
, 0x07);
106 mipi_dbi_command(mipi
, ILI9341_DISCTRL
, 0x0a, 0x82, 0x27, 0x00);
107 mipi_dbi_command(mipi
, MIPI_DCS_EXIT_SLEEP_MODE
);
110 mipi_dbi_command(mipi
, MIPI_DCS_SET_DISPLAY_ON
);
114 /* The PiTFT (ili9340) has a hardware reset circuit that
115 * resets only on power-on and not on each reboot through
116 * a gpio like the rpi-display does.
117 * As a result, we need to always apply the rotation value
118 * regardless of the display "on/off" state.
120 switch (mipi
->rotation
) {
122 addr_mode
= ILI9341_MADCTL_MV
| ILI9341_MADCTL_MY
|
126 addr_mode
= ILI9341_MADCTL_MY
;
129 addr_mode
= ILI9341_MADCTL_MV
;
132 addr_mode
= ILI9341_MADCTL_MX
;
135 addr_mode
|= ILI9341_MADCTL_BGR
;
136 mipi_dbi_command(mipi
, MIPI_DCS_SET_ADDRESS_MODE
, addr_mode
);
137 mipi_dbi_enable_flush(mipi
, crtc_state
, plane_state
);
142 static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs
= {
143 .enable
= mi0283qt_enable
,
144 .disable
= mipi_dbi_pipe_disable
,
145 .update
= mipi_dbi_pipe_update
,
146 .prepare_fb
= drm_gem_fb_simple_display_pipe_prepare_fb
,
149 static const struct drm_display_mode mi0283qt_mode
= {
150 DRM_SIMPLE_MODE(320, 240, 58, 43),
153 DEFINE_DRM_GEM_CMA_FOPS(mi0283qt_fops
);
155 static struct drm_driver mi0283qt_driver
= {
156 .driver_features
= DRIVER_GEM
| DRIVER_MODESET
| DRIVER_PRIME
|
158 .fops
= &mi0283qt_fops
,
159 .release
= mipi_dbi_release
,
160 DRM_GEM_CMA_VMAP_DRIVER_OPS
,
161 .debugfs_init
= mipi_dbi_debugfs_init
,
163 .desc
= "Multi-Inno MI0283QT",
169 static const struct of_device_id mi0283qt_of_match
[] = {
170 { .compatible
= "multi-inno,mi0283qt" },
173 MODULE_DEVICE_TABLE(of
, mi0283qt_of_match
);
175 static const struct spi_device_id mi0283qt_id
[] = {
179 MODULE_DEVICE_TABLE(spi
, mi0283qt_id
);
181 static int mi0283qt_probe(struct spi_device
*spi
)
183 struct device
*dev
= &spi
->dev
;
184 struct drm_device
*drm
;
185 struct mipi_dbi
*mipi
;
186 struct gpio_desc
*dc
;
190 mipi
= kzalloc(sizeof(*mipi
), GFP_KERNEL
);
195 ret
= devm_drm_dev_init(dev
, drm
, &mi0283qt_driver
);
201 drm_mode_config_init(drm
);
203 mipi
->reset
= devm_gpiod_get_optional(dev
, "reset", GPIOD_OUT_HIGH
);
204 if (IS_ERR(mipi
->reset
)) {
205 DRM_DEV_ERROR(dev
, "Failed to get gpio 'reset'\n");
206 return PTR_ERR(mipi
->reset
);
209 dc
= devm_gpiod_get_optional(dev
, "dc", GPIOD_OUT_LOW
);
211 DRM_DEV_ERROR(dev
, "Failed to get gpio 'dc'\n");
215 mipi
->regulator
= devm_regulator_get(dev
, "power");
216 if (IS_ERR(mipi
->regulator
))
217 return PTR_ERR(mipi
->regulator
);
219 mipi
->backlight
= devm_of_find_backlight(dev
);
220 if (IS_ERR(mipi
->backlight
))
221 return PTR_ERR(mipi
->backlight
);
223 device_property_read_u32(dev
, "rotation", &rotation
);
225 ret
= mipi_dbi_spi_init(spi
, mipi
, dc
);
229 ret
= mipi_dbi_init(mipi
, &mi0283qt_pipe_funcs
, &mi0283qt_mode
, rotation
);
233 drm_mode_config_reset(drm
);
235 ret
= drm_dev_register(drm
, 0);
239 spi_set_drvdata(spi
, drm
);
241 drm_fbdev_generic_setup(drm
, 0);
246 static int mi0283qt_remove(struct spi_device
*spi
)
248 struct drm_device
*drm
= spi_get_drvdata(spi
);
251 drm_atomic_helper_shutdown(drm
);
256 static void mi0283qt_shutdown(struct spi_device
*spi
)
258 drm_atomic_helper_shutdown(spi_get_drvdata(spi
));
261 static int __maybe_unused
mi0283qt_pm_suspend(struct device
*dev
)
263 return drm_mode_config_helper_suspend(dev_get_drvdata(dev
));
266 static int __maybe_unused
mi0283qt_pm_resume(struct device
*dev
)
268 drm_mode_config_helper_resume(dev_get_drvdata(dev
));
273 static const struct dev_pm_ops mi0283qt_pm_ops
= {
274 SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend
, mi0283qt_pm_resume
)
277 static struct spi_driver mi0283qt_spi_driver
= {
280 .owner
= THIS_MODULE
,
281 .of_match_table
= mi0283qt_of_match
,
282 .pm
= &mi0283qt_pm_ops
,
284 .id_table
= mi0283qt_id
,
285 .probe
= mi0283qt_probe
,
286 .remove
= mi0283qt_remove
,
287 .shutdown
= mi0283qt_shutdown
,
289 module_spi_driver(mi0283qt_spi_driver
);
291 MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver");
292 MODULE_AUTHOR("Noralf Trønnes");
293 MODULE_LICENSE("GPL");