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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) STMicroelectronics SA 20144 * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.5 */6 7#include <linux/component.h>8#include <linux/debugfs.h>9#include <linux/dma-mapping.h>10#include <linux/kernel.h>11#include <linux/module.h>12#include <linux/of.h>13#include <linux/of_platform.h>14#include <linux/platform_device.h>15 16#include <drm/drm_atomic.h>17#include <drm/drm_atomic_helper.h>18#include <drm/drm_debugfs.h>19#include <drm/drm_drv.h>20#include <drm/drm_fbdev_dma.h>21#include <drm/drm_gem_dma_helper.h>22#include <drm/drm_gem_framebuffer_helper.h>23#include <drm/drm_of.h>24#include <drm/drm_probe_helper.h>25 26#include "sti_drv.h"27#include "sti_plane.h"28 29#define DRIVER_NAME "sti"30#define DRIVER_DESC "STMicroelectronics SoC DRM"31#define DRIVER_DATE "20140601"32#define DRIVER_MAJOR 133#define DRIVER_MINOR 034 35#define STI_MAX_FB_HEIGHT 409636#define STI_MAX_FB_WIDTH 409637 38static int sti_drm_fps_get(void *data, u64 *val)39{40 struct drm_device *drm_dev = data;41 struct drm_plane *p;42 unsigned int i = 0;43 44 *val = 0;45 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {46 struct sti_plane *plane = to_sti_plane(p);47 48 *val |= plane->fps_info.output << i;49 i++;50 }51 52 return 0;53}54 55static int sti_drm_fps_set(void *data, u64 val)56{57 struct drm_device *drm_dev = data;58 struct drm_plane *p;59 unsigned int i = 0;60 61 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {62 struct sti_plane *plane = to_sti_plane(p);63 64 memset(&plane->fps_info, 0, sizeof(plane->fps_info));65 plane->fps_info.output = (val >> i) & 1;66 67 i++;68 }69 70 return 0;71}72 73DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,74 sti_drm_fps_get, sti_drm_fps_set, "%llu\n");75 76static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)77{78 struct drm_info_node *node = s->private;79 struct drm_device *dev = node->minor->dev;80 struct drm_plane *p;81 82 list_for_each_entry(p, &dev->mode_config.plane_list, head) {83 struct sti_plane *plane = to_sti_plane(p);84 85 seq_printf(s, "%s%s\n",86 plane->fps_info.fps_str,87 plane->fps_info.fips_str);88 }89 90 return 0;91}92 93static struct drm_info_list sti_drm_dbg_list[] = {94 {"fps_get", sti_drm_fps_dbg_show, 0},95};96 97static void sti_drm_dbg_init(struct drm_minor *minor)98{99 drm_debugfs_create_files(sti_drm_dbg_list,100 ARRAY_SIZE(sti_drm_dbg_list),101 minor->debugfs_root, minor);102 103 debugfs_create_file("fps_show", S_IRUGO | S_IWUSR, minor->debugfs_root,104 minor->dev, &sti_drm_fps_fops);105 106 DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);107}108 109static const struct drm_mode_config_funcs sti_mode_config_funcs = {110 .fb_create = drm_gem_fb_create,111 .atomic_check = drm_atomic_helper_check,112 .atomic_commit = drm_atomic_helper_commit,113};114 115static void sti_mode_config_init(struct drm_device *dev)116{117 dev->mode_config.min_width = 0;118 dev->mode_config.min_height = 0;119 120 /*121 * set max width and height as default value.122 * this value would be used to check framebuffer size limitation123 * at drm_mode_addfb().124 */125 dev->mode_config.max_width = STI_MAX_FB_WIDTH;126 dev->mode_config.max_height = STI_MAX_FB_HEIGHT;127 128 dev->mode_config.funcs = &sti_mode_config_funcs;129 130 dev->mode_config.normalize_zpos = true;131}132 133DEFINE_DRM_GEM_DMA_FOPS(sti_driver_fops);134 135static const struct drm_driver sti_driver = {136 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,137 .fops = &sti_driver_fops,138 DRM_GEM_DMA_DRIVER_OPS,139 140 .debugfs_init = sti_drm_dbg_init,141 142 .name = DRIVER_NAME,143 .desc = DRIVER_DESC,144 .date = DRIVER_DATE,145 .major = DRIVER_MAJOR,146 .minor = DRIVER_MINOR,147};148 149static int sti_init(struct drm_device *ddev)150{151 struct sti_private *private;152 153 private = kzalloc(sizeof(*private), GFP_KERNEL);154 if (!private)155 return -ENOMEM;156 157 ddev->dev_private = (void *)private;158 dev_set_drvdata(ddev->dev, ddev);159 private->drm_dev = ddev;160 161 drm_mode_config_init(ddev);162 163 sti_mode_config_init(ddev);164 165 drm_kms_helper_poll_init(ddev);166 167 return 0;168}169 170static void sti_cleanup(struct drm_device *ddev)171{172 struct sti_private *private = ddev->dev_private;173 174 drm_kms_helper_poll_fini(ddev);175 drm_atomic_helper_shutdown(ddev);176 drm_mode_config_cleanup(ddev);177 component_unbind_all(ddev->dev, ddev);178 dev_set_drvdata(ddev->dev, NULL);179 kfree(private);180 ddev->dev_private = NULL;181}182 183static int sti_bind(struct device *dev)184{185 struct drm_device *ddev;186 int ret;187 188 ddev = drm_dev_alloc(&sti_driver, dev);189 if (IS_ERR(ddev))190 return PTR_ERR(ddev);191 192 ret = sti_init(ddev);193 if (ret)194 goto err_drm_dev_put;195 196 ret = component_bind_all(ddev->dev, ddev);197 if (ret)198 goto err_cleanup;199 200 ret = drm_dev_register(ddev, 0);201 if (ret)202 goto err_cleanup;203 204 drm_mode_config_reset(ddev);205 206 drm_fbdev_dma_setup(ddev, 32);207 208 return 0;209 210err_cleanup:211 sti_cleanup(ddev);212err_drm_dev_put:213 drm_dev_put(ddev);214 return ret;215}216 217static void sti_unbind(struct device *dev)218{219 struct drm_device *ddev = dev_get_drvdata(dev);220 221 drm_dev_unregister(ddev);222 sti_cleanup(ddev);223 drm_dev_put(ddev);224}225 226static const struct component_master_ops sti_ops = {227 .bind = sti_bind,228 .unbind = sti_unbind,229};230 231static int sti_platform_probe(struct platform_device *pdev)232{233 struct device *dev = &pdev->dev;234 struct device_node *node = dev->of_node;235 struct device_node *child_np;236 struct component_match *match = NULL;237 238 dma_set_coherent_mask(dev, DMA_BIT_MASK(32));239 240 devm_of_platform_populate(dev);241 242 child_np = of_get_next_available_child(node, NULL);243 244 while (child_np) {245 drm_of_component_match_add(dev, &match, component_compare_of,246 child_np);247 child_np = of_get_next_available_child(node, child_np);248 }249 250 return component_master_add_with_match(dev, &sti_ops, match);251}252 253static void sti_platform_remove(struct platform_device *pdev)254{255 component_master_del(&pdev->dev, &sti_ops);256}257 258static void sti_platform_shutdown(struct platform_device *pdev)259{260 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));261}262 263static const struct of_device_id sti_dt_ids[] = {264 { .compatible = "st,sti-display-subsystem", },265 { /* end node */ },266};267MODULE_DEVICE_TABLE(of, sti_dt_ids);268 269static struct platform_driver sti_platform_driver = {270 .probe = sti_platform_probe,271 .remove_new = sti_platform_remove,272 .shutdown = sti_platform_shutdown,273 .driver = {274 .name = DRIVER_NAME,275 .of_match_table = sti_dt_ids,276 },277};278 279static struct platform_driver * const drivers[] = {280 &sti_tvout_driver,281 &sti_hqvdp_driver,282 &sti_hdmi_driver,283 &sti_hda_driver,284 &sti_dvo_driver,285 &sti_vtg_driver,286 &sti_compositor_driver,287 &sti_platform_driver,288};289 290static int sti_drm_init(void)291{292 if (drm_firmware_drivers_only())293 return -ENODEV;294 295 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));296}297module_init(sti_drm_init);298 299static void sti_drm_exit(void)300{301 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));302}303module_exit(sti_drm_exit);304 305MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");306MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");307MODULE_LICENSE("GPL");308