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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Freescale i.MX drm driver4 *5 * Copyright (C) 2011 Sascha Hauer, Pengutronix6 */7 8#include <linux/component.h>9#include <linux/device.h>10#include <linux/dma-buf.h>11#include <linux/module.h>12#include <linux/platform_device.h>13 14#include <video/imx-ipu-v3.h>15 16#include <drm/drm_atomic.h>17#include <drm/drm_atomic_helper.h>18#include <drm/drm_drv.h>19#include <drm/drm_fbdev_dma.h>20#include <drm/drm_gem_dma_helper.h>21#include <drm/drm_gem_framebuffer_helper.h>22#include <drm/drm_managed.h>23#include <drm/drm_of.h>24#include <drm/drm_probe_helper.h>25#include <drm/drm_vblank.h>26 27#include "imx-drm.h"28#include "ipuv3-plane.h"29 30#define MAX_CRTC 431 32static int legacyfb_depth = 16;33module_param(legacyfb_depth, int, 0444);34 35DEFINE_DRM_GEM_DMA_FOPS(imx_drm_driver_fops);36 37void imx_drm_connector_destroy(struct drm_connector *connector)38{39 drm_connector_unregister(connector);40 drm_connector_cleanup(connector);41}42EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);43 44static int imx_drm_atomic_check(struct drm_device *dev,45 struct drm_atomic_state *state)46{47 int ret;48 49 ret = drm_atomic_helper_check(dev, state);50 if (ret)51 return ret;52 53 /*54 * Check modeset again in case crtc_state->mode_changed is55 * updated in plane's ->atomic_check callback.56 */57 ret = drm_atomic_helper_check_modeset(dev, state);58 if (ret)59 return ret;60 61 /* Assign PRG/PRE channels and check if all constrains are satisfied. */62 ret = ipu_planes_assign_pre(dev, state);63 if (ret)64 return ret;65 66 return ret;67}68 69static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {70 .fb_create = drm_gem_fb_create,71 .atomic_check = imx_drm_atomic_check,72 .atomic_commit = drm_atomic_helper_commit,73};74 75static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)76{77 struct drm_device *dev = state->dev;78 struct drm_plane *plane;79 struct drm_plane_state *old_plane_state, *new_plane_state;80 bool plane_disabling = false;81 int i;82 83 drm_atomic_helper_commit_modeset_disables(dev, state);84 85 drm_atomic_helper_commit_planes(dev, state,86 DRM_PLANE_COMMIT_ACTIVE_ONLY |87 DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET);88 89 drm_atomic_helper_commit_modeset_enables(dev, state);90 91 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {92 if (drm_atomic_plane_disabling(old_plane_state, new_plane_state))93 plane_disabling = true;94 }95 96 /*97 * The flip done wait is only strictly required by imx-drm if a deferred98 * plane disable is in-flight. As the core requires blocking commits99 * to wait for the flip it is done here unconditionally. This keeps the100 * workitem around a bit longer than required for the majority of101 * non-blocking commits, but we accept that for the sake of simplicity.102 */103 drm_atomic_helper_wait_for_flip_done(dev, state);104 105 if (plane_disabling) {106 for_each_old_plane_in_state(state, plane, old_plane_state, i)107 ipu_plane_disable_deferred(plane);108 109 }110 111 drm_atomic_helper_commit_hw_done(state);112}113 114static const struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = {115 .atomic_commit_tail = imx_drm_atomic_commit_tail,116};117 118 119int imx_drm_encoder_parse_of(struct drm_device *drm,120 struct drm_encoder *encoder, struct device_node *np)121{122 uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);123 124 /*125 * If we failed to find the CRTC(s) which this encoder is126 * supposed to be connected to, it's because the CRTC has127 * not been registered yet. Defer probing, and hope that128 * the required CRTC is added later.129 */130 if (crtc_mask == 0)131 return -EPROBE_DEFER;132 133 encoder->possible_crtcs = crtc_mask;134 135 /* FIXME: cloning support not clear, disable it all for now */136 encoder->possible_clones = 0;137 138 return 0;139}140EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);141 142static const struct drm_ioctl_desc imx_drm_ioctls[] = {143 /* none so far */144};145 146static int imx_drm_dumb_create(struct drm_file *file_priv,147 struct drm_device *drm,148 struct drm_mode_create_dumb *args)149{150 u32 width = args->width;151 int ret;152 153 args->width = ALIGN(width, 8);154 155 ret = drm_gem_dma_dumb_create(file_priv, drm, args);156 if (ret)157 return ret;158 159 args->width = width;160 return ret;161}162 163static const struct drm_driver imx_drm_driver = {164 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,165 DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(imx_drm_dumb_create),166 .ioctls = imx_drm_ioctls,167 .num_ioctls = ARRAY_SIZE(imx_drm_ioctls),168 .fops = &imx_drm_driver_fops,169 .name = "imx-drm",170 .desc = "i.MX DRM graphics",171 .date = "20120507",172 .major = 1,173 .minor = 0,174 .patchlevel = 0,175};176 177static int compare_of(struct device *dev, void *data)178{179 struct device_node *np = data;180 181 /* Special case for DI, dev->of_node may not be set yet */182 if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {183 struct ipu_client_platformdata *pdata = dev->platform_data;184 185 return pdata->of_node == np;186 }187 188 /* Special case for LDB, one device for two channels */189 if (of_node_name_eq(np, "lvds-channel")) {190 np = of_get_parent(np);191 of_node_put(np);192 }193 194 return dev->of_node == np;195}196 197static int imx_drm_bind(struct device *dev)198{199 struct drm_device *drm;200 int ret;201 202 drm = drm_dev_alloc(&imx_drm_driver, dev);203 if (IS_ERR(drm))204 return PTR_ERR(drm);205 206 /*207 * set max width and height as default value(4096x4096).208 * this value would be used to check framebuffer size limitation209 * at drm_mode_addfb().210 */211 drm->mode_config.min_width = 1;212 drm->mode_config.min_height = 1;213 drm->mode_config.max_width = 4096;214 drm->mode_config.max_height = 4096;215 drm->mode_config.funcs = &imx_drm_mode_config_funcs;216 drm->mode_config.helper_private = &imx_drm_mode_config_helpers;217 drm->mode_config.normalize_zpos = true;218 219 ret = drmm_mode_config_init(drm);220 if (ret)221 goto err_kms;222 223 ret = drm_vblank_init(drm, MAX_CRTC);224 if (ret)225 goto err_kms;226 227 dev_set_drvdata(dev, drm);228 229 /* Now try and bind all our sub-components */230 ret = component_bind_all(dev, drm);231 if (ret)232 goto err_kms;233 234 drm_mode_config_reset(drm);235 236 /*237 * All components are now initialised, so setup the fb helper.238 * The fb helper takes copies of key hardware information, so the239 * crtcs/connectors/encoders must not change after this point.240 */241 if (legacyfb_depth != 16 && legacyfb_depth != 32) {242 dev_warn(dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n");243 legacyfb_depth = 16;244 }245 246 drm_kms_helper_poll_init(drm);247 248 ret = drm_dev_register(drm, 0);249 if (ret)250 goto err_poll_fini;251 252 drm_fbdev_dma_setup(drm, legacyfb_depth);253 254 return 0;255 256err_poll_fini:257 drm_kms_helper_poll_fini(drm);258 component_unbind_all(drm->dev, drm);259err_kms:260 dev_set_drvdata(dev, NULL);261 drm_dev_put(drm);262 263 return ret;264}265 266static void imx_drm_unbind(struct device *dev)267{268 struct drm_device *drm = dev_get_drvdata(dev);269 270 drm_dev_unregister(drm);271 272 drm_kms_helper_poll_fini(drm);273 drm_atomic_helper_shutdown(drm);274 275 component_unbind_all(drm->dev, drm);276 277 drm_dev_put(drm);278 279 dev_set_drvdata(dev, NULL);280}281 282static const struct component_master_ops imx_drm_ops = {283 .bind = imx_drm_bind,284 .unbind = imx_drm_unbind,285};286 287static int imx_drm_platform_probe(struct platform_device *pdev)288{289 int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);290 291 if (!ret)292 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));293 294 return ret;295}296 297static void imx_drm_platform_remove(struct platform_device *pdev)298{299 component_master_del(&pdev->dev, &imx_drm_ops);300}301 302static void imx_drm_platform_shutdown(struct platform_device *pdev)303{304 drm_atomic_helper_shutdown(platform_get_drvdata(pdev));305}306 307#ifdef CONFIG_PM_SLEEP308static int imx_drm_suspend(struct device *dev)309{310 struct drm_device *drm_dev = dev_get_drvdata(dev);311 312 return drm_mode_config_helper_suspend(drm_dev);313}314 315static int imx_drm_resume(struct device *dev)316{317 struct drm_device *drm_dev = dev_get_drvdata(dev);318 319 return drm_mode_config_helper_resume(drm_dev);320}321#endif322 323static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);324 325static const struct of_device_id imx_drm_dt_ids[] = {326 { .compatible = "fsl,imx-display-subsystem", },327 { /* sentinel */ },328};329MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);330 331static struct platform_driver imx_drm_pdrv = {332 .probe = imx_drm_platform_probe,333 .remove_new = imx_drm_platform_remove,334 .shutdown = imx_drm_platform_shutdown,335 .driver = {336 .name = "imx-drm",337 .pm = &imx_drm_pm_ops,338 .of_match_table = imx_drm_dt_ids,339 },340};341 342static struct platform_driver * const drivers[] = {343 &imx_drm_pdrv,344 &ipu_drm_driver,345};346 347static int __init imx_drm_init(void)348{349 if (drm_firmware_drivers_only())350 return -ENODEV;351 352 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));353}354module_init(imx_drm_init);355 356static void __exit imx_drm_exit(void)357{358 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));359}360module_exit(imx_drm_exit);361 362MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");363MODULE_DESCRIPTION("i.MX drm driver core");364MODULE_LICENSE("GPL");365