1*50848e37SDaniel Mack // SPDX-License-Identifier: GPL-2.0+ 2*50848e37SDaniel Mack 3*50848e37SDaniel Mack #include <linux/backlight.h> 4*50848e37SDaniel Mack #include <linux/delay.h> 5*50848e37SDaniel Mack #include <linux/gpio/consumer.h> 6*50848e37SDaniel Mack #include <linux/module.h> 7*50848e37SDaniel Mack #include <linux/property.h> 8*50848e37SDaniel Mack #include <linux/spi/spi.h> 9*50848e37SDaniel Mack 10*50848e37SDaniel Mack #include <drm/drm_atomic_helper.h> 11*50848e37SDaniel Mack #include <drm/drm_drv.h> 12*50848e37SDaniel Mack #include <drm/drm_fb_helper.h> 13*50848e37SDaniel Mack #include <drm/drm_gem_cma_helper.h> 14*50848e37SDaniel Mack #include <drm/drm_gem_framebuffer_helper.h> 15*50848e37SDaniel Mack #include <drm/drm_mipi_dbi.h> 16*50848e37SDaniel Mack #include <drm/drm_modeset_helper.h> 17*50848e37SDaniel Mack #include <video/mipi_display.h> 18*50848e37SDaniel Mack 19*50848e37SDaniel Mack #define ILI9163_FRMCTR1 0xb1 20*50848e37SDaniel Mack 21*50848e37SDaniel Mack #define ILI9163_PWCTRL1 0xc0 22*50848e37SDaniel Mack #define ILI9163_PWCTRL2 0xc1 23*50848e37SDaniel Mack #define ILI9163_VMCTRL1 0xc5 24*50848e37SDaniel Mack #define ILI9163_VMCTRL2 0xc7 25*50848e37SDaniel Mack #define ILI9163_PWCTRLA 0xcb 26*50848e37SDaniel Mack #define ILI9163_PWCTRLB 0xcf 27*50848e37SDaniel Mack 28*50848e37SDaniel Mack #define ILI9163_EN3GAM 0xf2 29*50848e37SDaniel Mack 30*50848e37SDaniel Mack #define ILI9163_MADCTL_BGR BIT(3) 31*50848e37SDaniel Mack #define ILI9163_MADCTL_MV BIT(5) 32*50848e37SDaniel Mack #define ILI9163_MADCTL_MX BIT(6) 33*50848e37SDaniel Mack #define ILI9163_MADCTL_MY BIT(7) 34*50848e37SDaniel Mack 35*50848e37SDaniel Mack static void yx240qv29_enable(struct drm_simple_display_pipe *pipe, 36*50848e37SDaniel Mack struct drm_crtc_state *crtc_state, 37*50848e37SDaniel Mack struct drm_plane_state *plane_state) 38*50848e37SDaniel Mack { 39*50848e37SDaniel Mack struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); 40*50848e37SDaniel Mack struct mipi_dbi *dbi = &dbidev->dbi; 41*50848e37SDaniel Mack u8 addr_mode; 42*50848e37SDaniel Mack int ret, idx; 43*50848e37SDaniel Mack 44*50848e37SDaniel Mack if (!drm_dev_enter(pipe->crtc.dev, &idx)) 45*50848e37SDaniel Mack return; 46*50848e37SDaniel Mack 47*50848e37SDaniel Mack DRM_DEBUG_KMS("\n"); 48*50848e37SDaniel Mack 49*50848e37SDaniel Mack ret = mipi_dbi_poweron_conditional_reset(dbidev); 50*50848e37SDaniel Mack if (ret < 0) 51*50848e37SDaniel Mack goto out_exit; 52*50848e37SDaniel Mack if (ret == 1) 53*50848e37SDaniel Mack goto out_enable; 54*50848e37SDaniel Mack 55*50848e37SDaniel Mack /* Gamma */ 56*50848e37SDaniel Mack mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x04); 57*50848e37SDaniel Mack mipi_dbi_command(dbi, ILI9163_EN3GAM, 0x00); 58*50848e37SDaniel Mack 59*50848e37SDaniel Mack /* Frame Rate */ 60*50848e37SDaniel Mack mipi_dbi_command(dbi, ILI9163_FRMCTR1, 0x0a, 0x14); 61*50848e37SDaniel Mack 62*50848e37SDaniel Mack /* Power Control */ 63*50848e37SDaniel Mack mipi_dbi_command(dbi, ILI9163_PWCTRL1, 0x0a, 0x00); 64*50848e37SDaniel Mack mipi_dbi_command(dbi, ILI9163_PWCTRL2, 0x02); 65*50848e37SDaniel Mack 66*50848e37SDaniel Mack /* VCOM */ 67*50848e37SDaniel Mack mipi_dbi_command(dbi, ILI9163_VMCTRL1, 0x2f, 0x3e); 68*50848e37SDaniel Mack mipi_dbi_command(dbi, ILI9163_VMCTRL2, 0x40); 69*50848e37SDaniel Mack 70*50848e37SDaniel Mack /* Memory Access Control */ 71*50848e37SDaniel Mack mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); 72*50848e37SDaniel Mack 73*50848e37SDaniel Mack mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); 74*50848e37SDaniel Mack msleep(100); 75*50848e37SDaniel Mack 76*50848e37SDaniel Mack mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); 77*50848e37SDaniel Mack msleep(100); 78*50848e37SDaniel Mack 79*50848e37SDaniel Mack out_enable: 80*50848e37SDaniel Mack switch (dbidev->rotation) { 81*50848e37SDaniel Mack default: 82*50848e37SDaniel Mack addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MY; 83*50848e37SDaniel Mack break; 84*50848e37SDaniel Mack case 90: 85*50848e37SDaniel Mack addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MV; 86*50848e37SDaniel Mack break; 87*50848e37SDaniel Mack case 180: 88*50848e37SDaniel Mack addr_mode = 0; 89*50848e37SDaniel Mack break; 90*50848e37SDaniel Mack case 270: 91*50848e37SDaniel Mack addr_mode = ILI9163_MADCTL_MY | ILI9163_MADCTL_MV; 92*50848e37SDaniel Mack break; 93*50848e37SDaniel Mack } 94*50848e37SDaniel Mack addr_mode |= ILI9163_MADCTL_BGR; 95*50848e37SDaniel Mack mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); 96*50848e37SDaniel Mack mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); 97*50848e37SDaniel Mack out_exit: 98*50848e37SDaniel Mack drm_dev_exit(idx); 99*50848e37SDaniel Mack } 100*50848e37SDaniel Mack 101*50848e37SDaniel Mack static const struct drm_simple_display_pipe_funcs ili9163_pipe_funcs = { 102*50848e37SDaniel Mack .enable = yx240qv29_enable, 103*50848e37SDaniel Mack .disable = mipi_dbi_pipe_disable, 104*50848e37SDaniel Mack .update = mipi_dbi_pipe_update, 105*50848e37SDaniel Mack .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb, 106*50848e37SDaniel Mack }; 107*50848e37SDaniel Mack 108*50848e37SDaniel Mack static const struct drm_display_mode yx240qv29_mode = { 109*50848e37SDaniel Mack DRM_SIMPLE_MODE(128, 160, 28, 35), 110*50848e37SDaniel Mack }; 111*50848e37SDaniel Mack 112*50848e37SDaniel Mack DEFINE_DRM_GEM_CMA_FOPS(ili9163_fops); 113*50848e37SDaniel Mack 114*50848e37SDaniel Mack static struct drm_driver ili9163_driver = { 115*50848e37SDaniel Mack .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, 116*50848e37SDaniel Mack .fops = &ili9163_fops, 117*50848e37SDaniel Mack DRM_GEM_CMA_DRIVER_OPS_VMAP, 118*50848e37SDaniel Mack .debugfs_init = mipi_dbi_debugfs_init, 119*50848e37SDaniel Mack .name = "ili9163", 120*50848e37SDaniel Mack .desc = "Ilitek ILI9163", 121*50848e37SDaniel Mack .date = "20210208", 122*50848e37SDaniel Mack .major = 1, 123*50848e37SDaniel Mack .minor = 0, 124*50848e37SDaniel Mack }; 125*50848e37SDaniel Mack 126*50848e37SDaniel Mack static const struct of_device_id ili9163_of_match[] = { 127*50848e37SDaniel Mack { .compatible = "newhaven,1.8-128160EF" }, 128*50848e37SDaniel Mack { } 129*50848e37SDaniel Mack }; 130*50848e37SDaniel Mack MODULE_DEVICE_TABLE(of, ili9163_of_match); 131*50848e37SDaniel Mack 132*50848e37SDaniel Mack static const struct spi_device_id ili9163_id[] = { 133*50848e37SDaniel Mack { "nhd-1.8-128160EF", 0 }, 134*50848e37SDaniel Mack { } 135*50848e37SDaniel Mack }; 136*50848e37SDaniel Mack MODULE_DEVICE_TABLE(spi, ili9163_id); 137*50848e37SDaniel Mack 138*50848e37SDaniel Mack static int ili9163_probe(struct spi_device *spi) 139*50848e37SDaniel Mack { 140*50848e37SDaniel Mack struct device *dev = &spi->dev; 141*50848e37SDaniel Mack struct mipi_dbi_dev *dbidev; 142*50848e37SDaniel Mack struct drm_device *drm; 143*50848e37SDaniel Mack struct mipi_dbi *dbi; 144*50848e37SDaniel Mack struct gpio_desc *dc; 145*50848e37SDaniel Mack u32 rotation = 0; 146*50848e37SDaniel Mack int ret; 147*50848e37SDaniel Mack 148*50848e37SDaniel Mack dbidev = devm_drm_dev_alloc(dev, &ili9163_driver, 149*50848e37SDaniel Mack struct mipi_dbi_dev, drm); 150*50848e37SDaniel Mack if (IS_ERR(dbidev)) 151*50848e37SDaniel Mack return PTR_ERR(dbidev); 152*50848e37SDaniel Mack 153*50848e37SDaniel Mack dbi = &dbidev->dbi; 154*50848e37SDaniel Mack drm = &dbidev->drm; 155*50848e37SDaniel Mack 156*50848e37SDaniel Mack spi_set_drvdata(spi, drm); 157*50848e37SDaniel Mack 158*50848e37SDaniel Mack dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 159*50848e37SDaniel Mack if (IS_ERR(dbi->reset)) { 160*50848e37SDaniel Mack DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n"); 161*50848e37SDaniel Mack return PTR_ERR(dbi->reset); 162*50848e37SDaniel Mack } 163*50848e37SDaniel Mack 164*50848e37SDaniel Mack dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); 165*50848e37SDaniel Mack if (IS_ERR(dc)) { 166*50848e37SDaniel Mack DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n"); 167*50848e37SDaniel Mack return PTR_ERR(dc); 168*50848e37SDaniel Mack } 169*50848e37SDaniel Mack 170*50848e37SDaniel Mack dbidev->backlight = devm_of_find_backlight(dev); 171*50848e37SDaniel Mack if (IS_ERR(dbidev->backlight)) 172*50848e37SDaniel Mack return PTR_ERR(dbidev->backlight); 173*50848e37SDaniel Mack 174*50848e37SDaniel Mack device_property_read_u32(dev, "rotation", &rotation); 175*50848e37SDaniel Mack 176*50848e37SDaniel Mack ret = mipi_dbi_spi_init(spi, dbi, dc); 177*50848e37SDaniel Mack if (ret) 178*50848e37SDaniel Mack return ret; 179*50848e37SDaniel Mack 180*50848e37SDaniel Mack ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation); 181*50848e37SDaniel Mack if (ret) 182*50848e37SDaniel Mack return ret; 183*50848e37SDaniel Mack 184*50848e37SDaniel Mack drm_mode_config_reset(drm); 185*50848e37SDaniel Mack 186*50848e37SDaniel Mack ret = drm_dev_register(drm, 0); 187*50848e37SDaniel Mack if (ret) 188*50848e37SDaniel Mack return ret; 189*50848e37SDaniel Mack 190*50848e37SDaniel Mack drm_fbdev_generic_setup(drm, 0); 191*50848e37SDaniel Mack 192*50848e37SDaniel Mack return 0; 193*50848e37SDaniel Mack } 194*50848e37SDaniel Mack 195*50848e37SDaniel Mack static int ili9163_remove(struct spi_device *spi) 196*50848e37SDaniel Mack { 197*50848e37SDaniel Mack struct drm_device *drm = spi_get_drvdata(spi); 198*50848e37SDaniel Mack 199*50848e37SDaniel Mack drm_dev_unplug(drm); 200*50848e37SDaniel Mack drm_atomic_helper_shutdown(drm); 201*50848e37SDaniel Mack 202*50848e37SDaniel Mack return 0; 203*50848e37SDaniel Mack } 204*50848e37SDaniel Mack 205*50848e37SDaniel Mack static void ili9163_shutdown(struct spi_device *spi) 206*50848e37SDaniel Mack { 207*50848e37SDaniel Mack drm_atomic_helper_shutdown(spi_get_drvdata(spi)); 208*50848e37SDaniel Mack } 209*50848e37SDaniel Mack 210*50848e37SDaniel Mack static struct spi_driver ili9163_spi_driver = { 211*50848e37SDaniel Mack .driver = { 212*50848e37SDaniel Mack .name = "ili9163", 213*50848e37SDaniel Mack .of_match_table = ili9163_of_match, 214*50848e37SDaniel Mack }, 215*50848e37SDaniel Mack .id_table = ili9163_id, 216*50848e37SDaniel Mack .probe = ili9163_probe, 217*50848e37SDaniel Mack .remove = ili9163_remove, 218*50848e37SDaniel Mack .shutdown = ili9163_shutdown, 219*50848e37SDaniel Mack }; 220*50848e37SDaniel Mack module_spi_driver(ili9163_spi_driver); 221*50848e37SDaniel Mack 222*50848e37SDaniel Mack MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver"); 223*50848e37SDaniel Mack MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>"); 224*50848e37SDaniel Mack MODULE_LICENSE("GPL"); 225