ili9163.c

  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");