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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | // SPDX-License-Identifier: GPL-2.0+ /* * OMAP panel support * * Copyright (C) 2020 Dario Binacchi <dariobin@libero.it> */ #include <backlight.h> #include <clk.h> #include <display.h> #include <dm.h> #include <dm/device_compat.h> #include <log.h> #include <panel.h> #include <asm/gpio.h> #include <linux/err.h> #include "tilcdc.h" struct tilcdc_panel_priv { struct tilcdc_panel_info info; struct display_timing timing; struct udevice *backlight; struct gpio_desc enable; }; static int tilcdc_panel_enable_backlight(struct udevice *dev) { struct tilcdc_panel_priv *priv = dev_get_priv(dev); if (dm_gpio_is_valid(&priv->enable)) dm_gpio_set_value(&priv->enable, 1); if (priv->backlight) return backlight_enable(priv->backlight); return 0; } static int tilcdc_panel_set_backlight(struct udevice *dev, int percent) { struct tilcdc_panel_priv *priv = dev_get_priv(dev); if (dm_gpio_is_valid(&priv->enable)) dm_gpio_set_value(&priv->enable, 1); if (priv->backlight) return backlight_set_brightness(priv->backlight, percent); return 0; } int tilcdc_panel_get_display_info(struct udevice *dev, struct tilcdc_panel_info *info) { struct tilcdc_panel_priv *priv = dev_get_priv(dev); memcpy(info, &priv->info, sizeof(*info)); return 0; } static int tilcdc_panel_get_display_timing(struct udevice *dev, struct display_timing *timing) { struct tilcdc_panel_priv *priv = dev_get_priv(dev); memcpy(timing, &priv->timing, sizeof(*timing)); return 0; } static int tilcdc_panel_remove(struct udevice *dev) { struct tilcdc_panel_priv *priv = dev_get_priv(dev); if (dm_gpio_is_valid(&priv->enable)) dm_gpio_free(dev, &priv->enable); return 0; } static int tilcdc_panel_probe(struct udevice *dev) { struct tilcdc_panel_priv *priv = dev_get_priv(dev); int err; err = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, "backlight", &priv->backlight); if (err) dev_warn(dev, "failed to get backlight\n"); err = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable, GPIOD_IS_OUT); if (err) { dev_warn(dev, "failed to get enable GPIO\n"); if (err != -ENOENT) return err; } return 0; } static int tilcdc_panel_of_to_plat(struct udevice *dev) { struct tilcdc_panel_priv *priv = dev_get_priv(dev); ofnode node; int err; err = ofnode_decode_display_timing(dev_ofnode(dev), 0, &priv->timing); if (err) { dev_err(dev, "failed to get display timing\n"); return err; } node = dev_read_subnode(dev, "panel-info"); if (!ofnode_valid(node)) { dev_err(dev, "missing 'panel-info' node\n"); return -ENXIO; } err |= ofnode_read_u32(node, "ac-bias", &priv->info.ac_bias); err |= ofnode_read_u32(node, "ac-bias-intrpt", &priv->info.ac_bias_intrpt); err |= ofnode_read_u32(node, "dma-burst-sz", &priv->info.dma_burst_sz); err |= ofnode_read_u32(node, "bpp", &priv->info.bpp); err |= ofnode_read_u32(node, "fdd", &priv->info.fdd); err |= ofnode_read_u32(node, "sync-edge", &priv->info.sync_edge); err |= ofnode_read_u32(node, "sync-ctrl", &priv->info.sync_ctrl); err |= ofnode_read_u32(node, "raster-order", &priv->info.raster_order); err |= ofnode_read_u32(node, "fifo-th", &priv->info.fifo_th); if (err) { dev_err(dev, "failed to get panel info\n"); return err; } /* optional */ priv->info.tft_alt_mode = ofnode_read_bool(node, "tft-alt-mode"); priv->info.invert_pxl_clk = ofnode_read_bool(node, "invert-pxl-clk"); dev_dbg(dev, "LCD: %dx%d, bpp=%d, clk=%d Hz\n", priv->timing.hactive.typ, priv->timing.vactive.typ, priv->info.bpp, priv->timing.pixelclock.typ); dev_dbg(dev, " hbp=%d, hfp=%d, hsw=%d\n", priv->timing.hback_porch.typ, priv->timing.hfront_porch.typ, priv->timing.hsync_len.typ); dev_dbg(dev, " vbp=%d, vfp=%d, vsw=%d\n", priv->timing.vback_porch.typ, priv->timing.vfront_porch.typ, priv->timing.vsync_len.typ); return 0; } static const struct panel_ops tilcdc_panel_ops = { .enable_backlight = tilcdc_panel_enable_backlight, .set_backlight = tilcdc_panel_set_backlight, .get_display_timing = tilcdc_panel_get_display_timing, }; static const struct udevice_id tilcdc_panel_ids[] = { {.compatible = "ti,tilcdc,panel"}, {} }; U_BOOT_DRIVER(tilcdc_panel) = { .name = "tilcdc_panel", .id = UCLASS_PANEL, .of_match = tilcdc_panel_ids, .ops = &tilcdc_panel_ops, .of_to_plat = tilcdc_panel_of_to_plat, .probe = tilcdc_panel_probe, .remove = tilcdc_panel_remove, .priv_auto = sizeof(struct tilcdc_panel_priv), }; |