1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2024 NXP 4 */ 5 6 #include <linux/component.h> 7 #include <linux/module.h> 8 #include <linux/of_platform.h> 9 #include <linux/platform_device.h> 10 #include <linux/pm.h> 11 #include <linux/pm_runtime.h> 12 #include <linux/regmap.h> 13 14 #include "dc-de.h" 15 #include "dc-drv.h" 16 17 #define POLARITYCTRL 0xc 18 #define POLEN_HIGH BIT(2) 19 20 static const struct dc_subdev_info dc_de_info[] = { 21 { .reg_start = 0x5618b400, .id = 0, }, 22 { .reg_start = 0x5618b420, .id = 1, }, 23 }; 24 25 static const struct regmap_range dc_de_regmap_ranges[] = { 26 regmap_reg_range(POLARITYCTRL, POLARITYCTRL), 27 }; 28 29 static const struct regmap_access_table dc_de_regmap_access_table = { 30 .yes_ranges = dc_de_regmap_ranges, 31 .n_yes_ranges = ARRAY_SIZE(dc_de_regmap_ranges), 32 }; 33 34 static const struct regmap_config dc_de_top_regmap_config = { 35 .name = "top", 36 .reg_bits = 32, 37 .reg_stride = 4, 38 .val_bits = 32, 39 .fast_io = true, 40 .wr_table = &dc_de_regmap_access_table, 41 .rd_table = &dc_de_regmap_access_table, 42 .max_register = POLARITYCTRL, 43 }; 44 45 static inline void dc_dec_init(struct dc_de *de) 46 { 47 regmap_write_bits(de->reg_top, POLARITYCTRL, POLARITYCTRL, POLEN_HIGH); 48 } 49 50 static int dc_de_bind(struct device *dev, struct device *master, void *data) 51 { 52 struct platform_device *pdev = to_platform_device(dev); 53 struct dc_drm_device *dc_drm = data; 54 struct resource *res_top; 55 void __iomem *base_top; 56 struct dc_de *de; 57 int ret, id; 58 59 de = devm_kzalloc(dev, sizeof(*de), GFP_KERNEL); 60 if (!de) 61 return -ENOMEM; 62 63 base_top = devm_platform_get_and_ioremap_resource(pdev, 0, &res_top); 64 if (IS_ERR(base_top)) 65 return PTR_ERR(base_top); 66 67 de->reg_top = devm_regmap_init_mmio(dev, base_top, 68 &dc_de_top_regmap_config); 69 if (IS_ERR(de->reg_top)) 70 return PTR_ERR(de->reg_top); 71 72 de->irq_shdload = platform_get_irq_byname(pdev, "shdload"); 73 if (de->irq_shdload < 0) 74 return de->irq_shdload; 75 76 de->irq_framecomplete = platform_get_irq_byname(pdev, "framecomplete"); 77 if (de->irq_framecomplete < 0) 78 return de->irq_framecomplete; 79 80 de->irq_seqcomplete = platform_get_irq_byname(pdev, "seqcomplete"); 81 if (de->irq_seqcomplete < 0) 82 return de->irq_seqcomplete; 83 84 de->dev = dev; 85 86 dev_set_drvdata(dev, de); 87 88 ret = devm_pm_runtime_enable(dev); 89 if (ret) 90 return ret; 91 92 id = dc_subdev_get_id(dc_de_info, ARRAY_SIZE(dc_de_info), res_top); 93 if (id < 0) { 94 dev_err(dev, "failed to get instance number: %d\n", id); 95 return id; 96 } 97 98 dc_drm->de[id] = de; 99 100 return 0; 101 } 102 103 /* 104 * It's possible to get the child device pointers from the child component 105 * bind callbacks, but it depends on the component helper behavior to bind 106 * the display engine component first. To avoid the dependency, post bind 107 * to get the pointers from dc_drm in a safe manner. 108 */ 109 void dc_de_post_bind(struct dc_drm_device *dc_drm) 110 { 111 struct dc_de *de; 112 int i; 113 114 for (i = 0; i < DC_DISPLAYS; i++) { 115 de = dc_drm->de[i]; 116 de->fg = dc_drm->fg[i]; 117 de->tc = dc_drm->tc[i]; 118 } 119 } 120 121 static const struct component_ops dc_de_ops = { 122 .bind = dc_de_bind, 123 }; 124 125 static int dc_de_probe(struct platform_device *pdev) 126 { 127 int ret; 128 129 ret = devm_of_platform_populate(&pdev->dev); 130 if (ret < 0) 131 return ret; 132 133 ret = component_add(&pdev->dev, &dc_de_ops); 134 if (ret) 135 return dev_err_probe(&pdev->dev, ret, 136 "failed to add component\n"); 137 138 return 0; 139 } 140 141 static void dc_de_remove(struct platform_device *pdev) 142 { 143 component_del(&pdev->dev, &dc_de_ops); 144 } 145 146 static int dc_de_runtime_resume(struct device *dev) 147 { 148 struct dc_de *de = dev_get_drvdata(dev); 149 150 dc_dec_init(de); 151 dc_fg_init(de->fg); 152 dc_tc_init(de->tc); 153 154 return 0; 155 } 156 157 static const struct dev_pm_ops dc_de_pm_ops = { 158 RUNTIME_PM_OPS(NULL, dc_de_runtime_resume, NULL) 159 }; 160 161 static const struct of_device_id dc_de_dt_ids[] = { 162 { .compatible = "fsl,imx8qxp-dc-display-engine" }, 163 { /* sentinel */ } 164 }; 165 MODULE_DEVICE_TABLE(of, dc_de_dt_ids); 166 167 struct platform_driver dc_de_driver = { 168 .probe = dc_de_probe, 169 .remove = dc_de_remove, 170 .driver = { 171 .name = "imx8-dc-display-engine", 172 .suppress_bind_attrs = true, 173 .of_match_table = dc_de_dt_ids, 174 .pm = pm_sleep_ptr(&dc_de_pm_ops), 175 }, 176 }; 177