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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (c) 2015 MediaTek Inc.
- * Author: YT SHEN <yt.shen@mediatek.com>
- */
- #include <linux/component.h>
- #include <linux/iommu.h>
- #include <linux/module.h>
- #include <linux/of_address.h>
- #include <linux/of_platform.h>
- #include <linux/pm_runtime.h>
- #include <linux/soc/mediatek/mtk-mmsys.h>
- #include <linux/dma-mapping.h>
- #include <drm/drm_atomic.h>
- #include <drm/drm_atomic_helper.h>
- #include <drm/drm_drv.h>
- #include <drm/drm_fb_helper.h>
- #include <drm/drm_fourcc.h>
- #include <drm/drm_gem.h>
- #include <drm/drm_gem_cma_helper.h>
- #include <drm/drm_gem_framebuffer_helper.h>
- #include <drm/drm_of.h>
- #include <drm/drm_probe_helper.h>
- #include <drm/drm_vblank.h>
- #include "mtk_drm_crtc.h"
- #include "mtk_drm_ddp.h"
- #include "mtk_drm_ddp_comp.h"
- #include "mtk_drm_drv.h"
- #include "mtk_drm_gem.h"
- #define DRIVER_NAME "mediatek"
- #define DRIVER_DESC "Mediatek SoC DRM"
- #define DRIVER_DATE "20150513"
- #define DRIVER_MAJOR 1
- #define DRIVER_MINOR 0
- static const struct drm_mode_config_helper_funcs mtk_drm_mode_config_helpers = {
- .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
- };
- static struct drm_framebuffer *
- mtk_drm_mode_fb_create(struct drm_device *dev,
- struct drm_file *file,
- const struct drm_mode_fb_cmd2 *cmd)
- {
- const struct drm_format_info *info = drm_get_format_info(dev, cmd);
- if (info->num_planes != 1)
- return ERR_PTR(-EINVAL);
- return drm_gem_fb_create(dev, file, cmd);
- }
- static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
- .fb_create = mtk_drm_mode_fb_create,
- .atomic_check = drm_atomic_helper_check,
- .atomic_commit = drm_atomic_helper_commit,
- };
- static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
- DDP_COMPONENT_OVL0,
- DDP_COMPONENT_RDMA0,
- DDP_COMPONENT_COLOR0,
- DDP_COMPONENT_BLS,
- DDP_COMPONENT_DSI0,
- };
- static const enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
- DDP_COMPONENT_RDMA1,
- DDP_COMPONENT_DPI0,
- };
- static const enum mtk_ddp_comp_id mt7623_mtk_ddp_main[] = {
- DDP_COMPONENT_OVL0,
- DDP_COMPONENT_RDMA0,
- DDP_COMPONENT_COLOR0,
- DDP_COMPONENT_BLS,
- DDP_COMPONENT_DPI0,
- };
- static const enum mtk_ddp_comp_id mt7623_mtk_ddp_ext[] = {
- DDP_COMPONENT_RDMA1,
- DDP_COMPONENT_DSI0,
- };
- static const enum mtk_ddp_comp_id mt2712_mtk_ddp_main[] = {
- DDP_COMPONENT_OVL0,
- DDP_COMPONENT_COLOR0,
- DDP_COMPONENT_AAL0,
- DDP_COMPONENT_OD0,
- DDP_COMPONENT_RDMA0,
- DDP_COMPONENT_DPI0,
- DDP_COMPONENT_PWM0,
- };
- static const enum mtk_ddp_comp_id mt2712_mtk_ddp_ext[] = {
- DDP_COMPONENT_OVL1,
- DDP_COMPONENT_COLOR1,
- DDP_COMPONENT_AAL1,
- DDP_COMPONENT_OD1,
- DDP_COMPONENT_RDMA1,
- DDP_COMPONENT_DPI1,
- DDP_COMPONENT_PWM1,
- };
- static const enum mtk_ddp_comp_id mt2712_mtk_ddp_third[] = {
- DDP_COMPONENT_RDMA2,
- DDP_COMPONENT_DSI3,
- DDP_COMPONENT_PWM2,
- };
- static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
- DDP_COMPONENT_OVL0,
- DDP_COMPONENT_COLOR0,
- DDP_COMPONENT_AAL0,
- DDP_COMPONENT_OD0,
- DDP_COMPONENT_RDMA0,
- DDP_COMPONENT_UFOE,
- DDP_COMPONENT_DSI0,
- DDP_COMPONENT_PWM0,
- };
- static const enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
- DDP_COMPONENT_OVL1,
- DDP_COMPONENT_COLOR1,
- DDP_COMPONENT_GAMMA,
- DDP_COMPONENT_RDMA1,
- DDP_COMPONENT_DPI0,
- };
- static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
- .main_path = mt2701_mtk_ddp_main,
- .main_len = ARRAY_SIZE(mt2701_mtk_ddp_main),
- .ext_path = mt2701_mtk_ddp_ext,
- .ext_len = ARRAY_SIZE(mt2701_mtk_ddp_ext),
- .shadow_register = true,
- };
- static const struct mtk_mmsys_driver_data mt7623_mmsys_driver_data = {
- .main_path = mt7623_mtk_ddp_main,
- .main_len = ARRAY_SIZE(mt7623_mtk_ddp_main),
- .ext_path = mt7623_mtk_ddp_ext,
- .ext_len = ARRAY_SIZE(mt7623_mtk_ddp_ext),
- .shadow_register = true,
- };
- static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = {
- .main_path = mt2712_mtk_ddp_main,
- .main_len = ARRAY_SIZE(mt2712_mtk_ddp_main),
- .ext_path = mt2712_mtk_ddp_ext,
- .ext_len = ARRAY_SIZE(mt2712_mtk_ddp_ext),
- .third_path = mt2712_mtk_ddp_third,
- .third_len = ARRAY_SIZE(mt2712_mtk_ddp_third),
- };
- static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
- .main_path = mt8173_mtk_ddp_main,
- .main_len = ARRAY_SIZE(mt8173_mtk_ddp_main),
- .ext_path = mt8173_mtk_ddp_ext,
- .ext_len = ARRAY_SIZE(mt8173_mtk_ddp_ext),
- };
- static int mtk_drm_kms_init(struct drm_device *drm)
- {
- struct mtk_drm_private *private = drm->dev_private;
- struct platform_device *pdev;
- struct device_node *np;
- struct device *dma_dev;
- int ret;
- if (!iommu_present(&platform_bus_type))
- return -EPROBE_DEFER;
- pdev = of_find_device_by_node(private->mutex_node);
- if (!pdev) {
- dev_err(drm->dev, "Waiting for disp-mutex device %pOF\n",
- private->mutex_node);
- of_node_put(private->mutex_node);
- return -EPROBE_DEFER;
- }
- private->mutex_dev = &pdev->dev;
- ret = drmm_mode_config_init(drm);
- if (ret)
- goto put_mutex_dev;
- drm->mode_config.min_width = 64;
- drm->mode_config.min_height = 64;
- /*
- * set max width and height as default value(4096x4096).
- * this value would be used to check framebuffer size limitation
- * at drm_mode_addfb().
- */
- drm->mode_config.max_width = 4096;
- drm->mode_config.max_height = 4096;
- drm->mode_config.funcs = &mtk_drm_mode_config_funcs;
- drm->mode_config.helper_private = &mtk_drm_mode_config_helpers;
- ret = component_bind_all(drm->dev, drm);
- if (ret)
- goto put_mutex_dev;
- /*
- * We currently support two fixed data streams, each optional,
- * and each statically assigned to a crtc:
- * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ...
- */
- ret = mtk_drm_crtc_create(drm, private->data->main_path,
- private->data->main_len);
- if (ret < 0)
- goto err_component_unbind;
- /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */
- ret = mtk_drm_crtc_create(drm, private->data->ext_path,
- private->data->ext_len);
- if (ret < 0)
- goto err_component_unbind;
- ret = mtk_drm_crtc_create(drm, private->data->third_path,
- private->data->third_len);
- if (ret < 0)
- goto err_component_unbind;
- /* Use OVL device for all DMA memory allocations */
- np = private->comp_node[private->data->main_path[0]] ?:
- private->comp_node[private->data->ext_path[0]];
- pdev = of_find_device_by_node(np);
- if (!pdev) {
- ret = -ENODEV;
- dev_err(drm->dev, "Need at least one OVL device\n");
- goto err_component_unbind;
- }
- dma_dev = &pdev->dev;
- private->dma_dev = dma_dev;
- /*
- * Configure the DMA segment size to make sure we get contiguous IOVA
- * when importing PRIME buffers.
- */
- if (!dma_dev->dma_parms) {
- private->dma_parms_allocated = true;
- dma_dev->dma_parms =
- devm_kzalloc(drm->dev, sizeof(*dma_dev->dma_parms),
- GFP_KERNEL);
- }
- if (!dma_dev->dma_parms) {
- ret = -ENOMEM;
- goto put_dma_dev;
- }
- ret = dma_set_max_seg_size(dma_dev, (unsigned int)DMA_BIT_MASK(32));
- if (ret) {
- dev_err(dma_dev, "Failed to set DMA segment size\n");
- goto err_unset_dma_parms;
- }
- /*
- * We don't use the drm_irq_install() helpers provided by the DRM
- * core, so we need to set this manually in order to allow the
- * DRM_IOCTL_WAIT_VBLANK to operate correctly.
- */
- drm->irq_enabled = true;
- ret = drm_vblank_init(drm, MAX_CRTC);
- if (ret < 0)
- goto err_unset_dma_parms;
- drm_kms_helper_poll_init(drm);
- drm_mode_config_reset(drm);
- return 0;
- err_unset_dma_parms:
- if (private->dma_parms_allocated)
- dma_dev->dma_parms = NULL;
- put_dma_dev:
- put_device(private->dma_dev);
- err_component_unbind:
- component_unbind_all(drm->dev, drm);
- put_mutex_dev:
- put_device(private->mutex_dev);
- return ret;
- }
- static void mtk_drm_kms_deinit(struct drm_device *drm)
- {
- struct mtk_drm_private *private = drm->dev_private;
- drm_kms_helper_poll_fini(drm);
- drm_atomic_helper_shutdown(drm);
- if (private->dma_parms_allocated)
- private->dma_dev->dma_parms = NULL;
- component_unbind_all(drm->dev, drm);
- }
- static const struct file_operations mtk_drm_fops = {
- .owner = THIS_MODULE,
- .open = drm_open,
- .release = drm_release,
- .unlocked_ioctl = drm_ioctl,
- .mmap = mtk_drm_gem_mmap,
- .poll = drm_poll,
- .read = drm_read,
- .compat_ioctl = drm_compat_ioctl,
- };
- /*
- * We need to override this because the device used to import the memory is
- * not dev->dev, as drm_gem_prime_import() expects.
- */
- struct drm_gem_object *mtk_drm_gem_prime_import(struct drm_device *dev,
- struct dma_buf *dma_buf)
- {
- struct mtk_drm_private *private = dev->dev_private;
- return drm_gem_prime_import_dev(dev, dma_buf, private->dma_dev);
- }
- static struct drm_driver mtk_drm_driver = {
- .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
- .gem_free_object_unlocked = mtk_drm_gem_free_object,
- .gem_vm_ops = &drm_gem_cma_vm_ops,
- .dumb_create = mtk_drm_gem_dumb_create,
- .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
- .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
- .gem_prime_import = mtk_drm_gem_prime_import,
- .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table,
- .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table,
- .gem_prime_mmap = mtk_drm_gem_mmap_buf,
- .gem_prime_vmap = mtk_drm_gem_prime_vmap,
- .gem_prime_vunmap = mtk_drm_gem_prime_vunmap,
- .fops = &mtk_drm_fops,
- .name = DRIVER_NAME,
- .desc = DRIVER_DESC,
- .date = DRIVER_DATE,
- .major = DRIVER_MAJOR,
- .minor = DRIVER_MINOR,
- };
- static int compare_of(struct device *dev, void *data)
- {
- return dev->of_node == data;
- }
- static int mtk_drm_bind(struct device *dev)
- {
- struct mtk_drm_private *private = dev_get_drvdata(dev);
- struct drm_device *drm;
- int ret;
- drm = drm_dev_alloc(&mtk_drm_driver, dev);
- if (IS_ERR(drm))
- return PTR_ERR(drm);
- drm->dev_private = private;
- private->drm = drm;
- ret = mtk_drm_kms_init(drm);
- if (ret < 0)
- goto err_free;
- ret = drm_dev_register(drm, 0);
- if (ret < 0)
- goto err_deinit;
- drm_fbdev_generic_setup(drm, 32);
- return 0;
- err_deinit:
- mtk_drm_kms_deinit(drm);
- err_free:
- drm_dev_put(drm);
- return ret;
- }
- static void mtk_drm_unbind(struct device *dev)
- {
- struct mtk_drm_private *private = dev_get_drvdata(dev);
- drm_dev_unregister(private->drm);
- mtk_drm_kms_deinit(private->drm);
- drm_dev_put(private->drm);
- private->num_pipes = 0;
- private->drm = NULL;
- }
- static const struct component_master_ops mtk_drm_ops = {
- .bind = mtk_drm_bind,
- .unbind = mtk_drm_unbind,
- };
- static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
- { .compatible = "mediatek,mt2701-disp-ovl",
- .data = (void *)MTK_DISP_OVL },
- { .compatible = "mediatek,mt8173-disp-ovl",
- .data = (void *)MTK_DISP_OVL },
- { .compatible = "mediatek,mt2701-disp-rdma",
- .data = (void *)MTK_DISP_RDMA },
- { .compatible = "mediatek,mt8173-disp-rdma",
- .data = (void *)MTK_DISP_RDMA },
- { .compatible = "mediatek,mt8173-disp-wdma",
- .data = (void *)MTK_DISP_WDMA },
- { .compatible = "mediatek,mt2701-disp-color",
- .data = (void *)MTK_DISP_COLOR },
- { .compatible = "mediatek,mt8173-disp-color",
- .data = (void *)MTK_DISP_COLOR },
- { .compatible = "mediatek,mt8173-disp-aal",
- .data = (void *)MTK_DISP_AAL},
- { .compatible = "mediatek,mt8173-disp-gamma",
- .data = (void *)MTK_DISP_GAMMA, },
- { .compatible = "mediatek,mt8173-disp-ufoe",
- .data = (void *)MTK_DISP_UFOE },
- { .compatible = "mediatek,mt2701-dsi",
- .data = (void *)MTK_DSI },
- { .compatible = "mediatek,mt8173-dsi",
- .data = (void *)MTK_DSI },
- { .compatible = "mediatek,mt2701-dpi",
- .data = (void *)MTK_DPI },
- { .compatible = "mediatek,mt8173-dpi",
- .data = (void *)MTK_DPI },
- { .compatible = "mediatek,mt2701-disp-mutex",
- .data = (void *)MTK_DISP_MUTEX },
- { .compatible = "mediatek,mt2712-disp-mutex",
- .data = (void *)MTK_DISP_MUTEX },
- { .compatible = "mediatek,mt8173-disp-mutex",
- .data = (void *)MTK_DISP_MUTEX },
- { .compatible = "mediatek,mt2701-disp-pwm",
- .data = (void *)MTK_DISP_BLS },
- { .compatible = "mediatek,mt8173-disp-pwm",
- .data = (void *)MTK_DISP_PWM },
- { .compatible = "mediatek,mt8173-disp-od",
- .data = (void *)MTK_DISP_OD },
- { }
- };
- static const struct of_device_id mtk_drm_of_ids[] = {
- { .compatible = "mediatek,mt2701-mmsys",
- .data = &mt2701_mmsys_driver_data},
- { .compatible = "mediatek,mt7623-mmsys",
- .data = &mt7623_mmsys_driver_data},
- { .compatible = "mediatek,mt2712-mmsys",
- .data = &mt2712_mmsys_driver_data},
- { .compatible = "mediatek,mt8173-mmsys",
- .data = &mt8173_mmsys_driver_data},
- { }
- };
- static int mtk_drm_probe(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- struct device_node *phandle = dev->parent->of_node;
- const struct of_device_id *of_id;
- struct mtk_drm_private *private;
- struct device_node *node;
- struct component_match *match = NULL;
- int ret;
- int i;
- private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL);
- if (!private)
- return -ENOMEM;
- private->mmsys_dev = dev->parent;
- if (!private->mmsys_dev) {
- dev_err(dev, "Failed to get MMSYS device\n");
- return -ENODEV;
- }
- of_id = of_match_node(mtk_drm_of_ids, phandle);
- if (!of_id)
- return -ENODEV;
- private->data = of_id->data;
- /* Iterate over sibling DISP function blocks */
- for_each_child_of_node(phandle->parent, node) {
- const struct of_device_id *of_id;
- enum mtk_ddp_comp_type comp_type;
- int comp_id;
- of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
- if (!of_id)
- continue;
- if (!of_device_is_available(node)) {
- dev_dbg(dev, "Skipping disabled component %pOF\n",
- node);
- continue;
- }
- comp_type = (enum mtk_ddp_comp_type)of_id->data;
- if (comp_type == MTK_DISP_MUTEX) {
- private->mutex_node = of_node_get(node);
- continue;
- }
- comp_id = mtk_ddp_comp_get_id(node, comp_type);
- if (comp_id < 0) {
- dev_warn(dev, "Skipping unknown component %pOF\n",
- node);
- continue;
- }
- private->comp_node[comp_id] = of_node_get(node);
- /*
- * Currently only the COLOR, OVL, RDMA, DSI, and DPI blocks have
- * separate component platform drivers and initialize their own
- * DDP component structure. The others are initialized here.
- */
- if (comp_type == MTK_DISP_COLOR ||
- comp_type == MTK_DISP_OVL ||
- comp_type == MTK_DISP_OVL_2L ||
- comp_type == MTK_DISP_RDMA ||
- comp_type == MTK_DSI ||
- comp_type == MTK_DPI) {
- dev_info(dev, "Adding component match for %pOF\n",
- node);
- drm_of_component_match_add(dev, &match, compare_of,
- node);
- } else {
- struct mtk_ddp_comp *comp;
- comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
- if (!comp) {
- ret = -ENOMEM;
- of_node_put(node);
- goto err_node;
- }
- ret = mtk_ddp_comp_init(dev->parent, node, comp,
- comp_id, NULL);
- if (ret) {
- of_node_put(node);
- goto err_node;
- }
- private->ddp_comp[comp_id] = comp;
- }
- }
- if (!private->mutex_node) {
- dev_err(dev, "Failed to find disp-mutex node\n");
- ret = -ENODEV;
- goto err_node;
- }
- pm_runtime_enable(dev);
- platform_set_drvdata(pdev, private);
- ret = component_master_add_with_match(dev, &mtk_drm_ops, match);
- if (ret)
- goto err_pm;
- return 0;
- err_pm:
- pm_runtime_disable(dev);
- err_node:
- of_node_put(private->mutex_node);
- for (i = 0; i < DDP_COMPONENT_ID_MAX; i++) {
- of_node_put(private->comp_node[i]);
- if (private->ddp_comp[i]) {
- put_device(private->ddp_comp[i]->larb_dev);
- private->ddp_comp[i] = NULL;
- }
- }
- return ret;
- }
- static int mtk_drm_remove(struct platform_device *pdev)
- {
- struct mtk_drm_private *private = platform_get_drvdata(pdev);
- int i;
- component_master_del(&pdev->dev, &mtk_drm_ops);
- pm_runtime_disable(&pdev->dev);
- of_node_put(private->mutex_node);
- for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
- of_node_put(private->comp_node[i]);
- return 0;
- }
- #ifdef CONFIG_PM_SLEEP
- static int mtk_drm_sys_suspend(struct device *dev)
- {
- struct mtk_drm_private *private = dev_get_drvdata(dev);
- struct drm_device *drm = private->drm;
- int ret;
- ret = drm_mode_config_helper_suspend(drm);
- return ret;
- }
- static int mtk_drm_sys_resume(struct device *dev)
- {
- struct mtk_drm_private *private = dev_get_drvdata(dev);
- struct drm_device *drm = private->drm;
- int ret;
- ret = drm_mode_config_helper_resume(drm);
- return ret;
- }
- #endif
- static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
- mtk_drm_sys_resume);
- static struct platform_driver mtk_drm_platform_driver = {
- .probe = mtk_drm_probe,
- .remove = mtk_drm_remove,
- .driver = {
- .name = "mediatek-drm",
- .pm = &mtk_drm_pm_ops,
- },
- };
- static struct platform_driver * const mtk_drm_drivers[] = {
- &mtk_ddp_driver,
- &mtk_disp_color_driver,
- &mtk_disp_ovl_driver,
- &mtk_disp_rdma_driver,
- &mtk_dpi_driver,
- &mtk_drm_platform_driver,
- &mtk_mipi_tx_driver,
- &mtk_dsi_driver,
- };
- static int __init mtk_drm_init(void)
- {
- return platform_register_drivers(mtk_drm_drivers,
- ARRAY_SIZE(mtk_drm_drivers));
- }
- static void __exit mtk_drm_exit(void)
- {
- platform_unregister_drivers(mtk_drm_drivers,
- ARRAY_SIZE(mtk_drm_drivers));
- }
- module_init(mtk_drm_init);
- module_exit(mtk_drm_exit);
- MODULE_AUTHOR("YT SHEN <yt.shen@mediatek.com>");
- MODULE_DESCRIPTION("Mediatek SoC DRM driver");
- MODULE_LICENSE("GPL v2");
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