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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2020 Unisoc Inc.4 */5 6#include <linux/component.h>7#include <linux/dma-mapping.h>8#include <linux/mod_devicetable.h>9#include <linux/module.h>10#include <linux/mutex.h>11#include <linux/of_graph.h>12#include <linux/platform_device.h>13 14#include <drm/drm_atomic_helper.h>15#include <drm/drm_drv.h>16#include <drm/drm_gem_dma_helper.h>17#include <drm/drm_gem_framebuffer_helper.h>18#include <drm/drm_of.h>19#include <drm/drm_probe_helper.h>20#include <drm/drm_vblank.h>21 22#include "sprd_drm.h"23 24#define DRIVER_NAME "sprd"25#define DRIVER_DESC "Spreadtrum SoCs' DRM Driver"26#define DRIVER_DATE "20200201"27#define DRIVER_MAJOR 128#define DRIVER_MINOR 029 30static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = {31 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,32};33 34static const struct drm_mode_config_funcs sprd_drm_mode_config_funcs = {35 .fb_create = drm_gem_fb_create,36 .atomic_check = drm_atomic_helper_check,37 .atomic_commit = drm_atomic_helper_commit,38};39 40static void sprd_drm_mode_config_init(struct drm_device *drm)41{42 drm->mode_config.min_width = 0;43 drm->mode_config.min_height = 0;44 drm->mode_config.max_width = 8192;45 drm->mode_config.max_height = 8192;46 47 drm->mode_config.funcs = &sprd_drm_mode_config_funcs;48 drm->mode_config.helper_private = &sprd_drm_mode_config_helper;49}50 51DEFINE_DRM_GEM_DMA_FOPS(sprd_drm_fops);52 53static struct drm_driver sprd_drm_drv = {54 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,55 .fops = &sprd_drm_fops,56 57 /* GEM Operations */58 DRM_GEM_DMA_DRIVER_OPS,59 60 .name = DRIVER_NAME,61 .desc = DRIVER_DESC,62 .date = DRIVER_DATE,63 .major = DRIVER_MAJOR,64 .minor = DRIVER_MINOR,65};66 67static int sprd_drm_bind(struct device *dev)68{69 struct platform_device *pdev = to_platform_device(dev);70 struct drm_device *drm;71 struct sprd_drm *sprd;72 int ret;73 74 sprd = devm_drm_dev_alloc(dev, &sprd_drm_drv, struct sprd_drm, drm);75 if (IS_ERR(sprd))76 return PTR_ERR(sprd);77 78 drm = &sprd->drm;79 platform_set_drvdata(pdev, drm);80 81 ret = drmm_mode_config_init(drm);82 if (ret)83 return ret;84 85 sprd_drm_mode_config_init(drm);86 87 /* bind and init sub drivers */88 ret = component_bind_all(drm->dev, drm);89 if (ret) {90 drm_err(drm, "failed to bind all component.\n");91 return ret;92 }93 94 /* vblank init */95 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);96 if (ret) {97 drm_err(drm, "failed to initialize vblank.\n");98 goto err_unbind_all;99 }100 101 /* reset all the states of crtc/plane/encoder/connector */102 drm_mode_config_reset(drm);103 104 /* init kms poll for handling hpd */105 drm_kms_helper_poll_init(drm);106 107 ret = drm_dev_register(drm, 0);108 if (ret < 0)109 goto err_kms_helper_poll_fini;110 111 return 0;112 113err_kms_helper_poll_fini:114 drm_kms_helper_poll_fini(drm);115err_unbind_all:116 component_unbind_all(drm->dev, drm);117 return ret;118}119 120static void sprd_drm_unbind(struct device *dev)121{122 struct drm_device *drm = dev_get_drvdata(dev);123 124 drm_dev_unregister(drm);125 126 drm_kms_helper_poll_fini(drm);127 128 component_unbind_all(drm->dev, drm);129}130 131static const struct component_master_ops drm_component_ops = {132 .bind = sprd_drm_bind,133 .unbind = sprd_drm_unbind,134};135 136static int sprd_drm_probe(struct platform_device *pdev)137{138 return drm_of_component_probe(&pdev->dev, component_compare_of, &drm_component_ops);139}140 141static void sprd_drm_remove(struct platform_device *pdev)142{143 component_master_del(&pdev->dev, &drm_component_ops);144}145 146static void sprd_drm_shutdown(struct platform_device *pdev)147{148 struct drm_device *drm = platform_get_drvdata(pdev);149 150 if (!drm) {151 dev_warn(&pdev->dev, "drm device is not available, no shutdown\n");152 return;153 }154 155 drm_atomic_helper_shutdown(drm);156}157 158static const struct of_device_id drm_match_table[] = {159 { .compatible = "sprd,display-subsystem", },160 { /* sentinel */ },161};162MODULE_DEVICE_TABLE(of, drm_match_table);163 164static struct platform_driver sprd_drm_driver = {165 .probe = sprd_drm_probe,166 .remove_new = sprd_drm_remove,167 .shutdown = sprd_drm_shutdown,168 .driver = {169 .name = "sprd-drm-drv",170 .of_match_table = drm_match_table,171 },172};173 174static struct platform_driver *sprd_drm_drivers[] = {175 &sprd_drm_driver,176 &sprd_dpu_driver,177 &sprd_dsi_driver,178};179 180static int __init sprd_drm_init(void)181{182 if (drm_firmware_drivers_only())183 return -ENODEV;184 185 return platform_register_drivers(sprd_drm_drivers,186 ARRAY_SIZE(sprd_drm_drivers));187}188 189static void __exit sprd_drm_exit(void)190{191 platform_unregister_drivers(sprd_drm_drivers,192 ARRAY_SIZE(sprd_drm_drivers));193}194 195module_init(sprd_drm_init);196module_exit(sprd_drm_exit);197 198MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");199MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");200MODULE_DESCRIPTION("Unisoc DRM KMS Master Driver");201MODULE_LICENSE("GPL v2");202