| /* |
| * Copyright (c) 2015 MediaTek Inc. |
| * Author: YT SHEN <yt.shen@mediatek.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <drm/drmP.h> |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_atomic_helper.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_gem.h> |
| #include <drm/drm_gem_cma_helper.h> |
| #include <drm/drm_of.h> |
| #include <linux/component.h> |
| #include <linux/iommu.h> |
| #include <linux/of_address.h> |
| #include <linux/of_platform.h> |
| #include <linux/pm_runtime.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_fb.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 void mtk_atomic_schedule(struct mtk_drm_private *private, |
| struct drm_atomic_state *state) |
| { |
| private->commit.state = state; |
| schedule_work(&private->commit.work); |
| } |
| |
| static void mtk_atomic_wait_for_fences(struct drm_atomic_state *state) |
| { |
| struct drm_plane *plane; |
| struct drm_plane_state *plane_state; |
| int i; |
| |
| for_each_plane_in_state(state, plane, plane_state, i) |
| mtk_fb_wait(plane->state->fb); |
| } |
| |
| static void mtk_atomic_complete(struct mtk_drm_private *private, |
| struct drm_atomic_state *state) |
| { |
| struct drm_device *drm = private->drm; |
| |
| mtk_atomic_wait_for_fences(state); |
| |
| /* |
| * Mediatek drm supports runtime PM, so plane registers cannot be |
| * written when their crtc is disabled. |
| * |
| * The comment for drm_atomic_helper_commit states: |
| * For drivers supporting runtime PM the recommended sequence is |
| * |
| * drm_atomic_helper_commit_modeset_disables(dev, state); |
| * drm_atomic_helper_commit_modeset_enables(dev, state); |
| * drm_atomic_helper_commit_planes(dev, state, |
| * DRM_PLANE_COMMIT_ACTIVE_ONLY); |
| * |
| * See the kerneldoc entries for these three functions for more details. |
| */ |
| drm_atomic_helper_commit_modeset_disables(drm, state); |
| drm_atomic_helper_commit_modeset_enables(drm, state); |
| drm_atomic_helper_commit_planes(drm, state, |
| DRM_PLANE_COMMIT_ACTIVE_ONLY); |
| |
| drm_atomic_helper_wait_for_vblanks(drm, state); |
| |
| drm_atomic_helper_cleanup_planes(drm, state); |
| drm_atomic_state_put(state); |
| } |
| |
| static void mtk_atomic_work(struct work_struct *work) |
| { |
| struct mtk_drm_private *private = container_of(work, |
| struct mtk_drm_private, commit.work); |
| |
| mtk_atomic_complete(private, private->commit.state); |
| } |
| |
| static int mtk_atomic_commit(struct drm_device *drm, |
| struct drm_atomic_state *state, |
| bool async) |
| { |
| struct mtk_drm_private *private = drm->dev_private; |
| int ret; |
| |
| ret = drm_atomic_helper_prepare_planes(drm, state); |
| if (ret) |
| return ret; |
| |
| mutex_lock(&private->commit.lock); |
| flush_work(&private->commit.work); |
| |
| drm_atomic_helper_swap_state(state, true); |
| |
| drm_atomic_state_get(state); |
| if (async) |
| mtk_atomic_schedule(private, state); |
| else |
| mtk_atomic_complete(private, state); |
| |
| mutex_unlock(&private->commit.lock); |
| |
| return 0; |
| } |
| |
| 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 = mtk_atomic_commit, |
| }; |
| |
| static const enum mtk_ddp_comp_id mtk_ddp_main[] = { |
| DDP_COMPONENT_OVL0, |
| DDP_COMPONENT_COLOR0, |
| DDP_COMPONENT_AAL, |
| DDP_COMPONENT_OD, |
| DDP_COMPONENT_RDMA0, |
| DDP_COMPONENT_UFOE, |
| DDP_COMPONENT_DSI0, |
| DDP_COMPONENT_PWM0, |
| }; |
| |
| static const enum mtk_ddp_comp_id mtk_ddp_ext[] = { |
| DDP_COMPONENT_OVL1, |
| DDP_COMPONENT_COLOR1, |
| DDP_COMPONENT_GAMMA, |
| DDP_COMPONENT_RDMA1, |
| DDP_COMPONENT_DPI0, |
| }; |
| |
| 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; |
| 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 %s\n", |
| private->mutex_node->full_name); |
| of_node_put(private->mutex_node); |
| return -EPROBE_DEFER; |
| } |
| private->mutex_dev = &pdev->dev; |
| |
| drm_mode_config_init(drm); |
| |
| 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; |
| |
| ret = component_bind_all(drm->dev, drm); |
| if (ret) |
| goto err_config_cleanup; |
| |
| /* |
| * 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, mtk_ddp_main, ARRAY_SIZE(mtk_ddp_main)); |
| if (ret < 0) |
| goto err_component_unbind; |
| /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */ |
| ret = mtk_drm_crtc_create(drm, mtk_ddp_ext, ARRAY_SIZE(mtk_ddp_ext)); |
| if (ret < 0) |
| goto err_component_unbind; |
| |
| /* Use OVL device for all DMA memory allocations */ |
| np = private->comp_node[mtk_ddp_main[0]] ?: |
| private->comp_node[mtk_ddp_ext[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; |
| } |
| |
| private->dma_dev = &pdev->dev; |
| |
| /* |
| * 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_component_unbind; |
| |
| drm_kms_helper_poll_init(drm); |
| drm_mode_config_reset(drm); |
| |
| return 0; |
| |
| err_component_unbind: |
| component_unbind_all(drm->dev, drm); |
| err_config_cleanup: |
| drm_mode_config_cleanup(drm); |
| |
| return ret; |
| } |
| |
| static void mtk_drm_kms_deinit(struct drm_device *drm) |
| { |
| drm_kms_helper_poll_fini(drm); |
| |
| drm_vblank_cleanup(drm); |
| component_unbind_all(drm->dev, drm); |
| drm_mode_config_cleanup(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, |
| }; |
| |
| static struct drm_driver mtk_drm_driver = { |
| .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | |
| DRIVER_ATOMIC, |
| |
| .get_vblank_counter = drm_vblank_no_hw_counter, |
| .enable_vblank = mtk_drm_crtc_enable_vblank, |
| .disable_vblank = mtk_drm_crtc_disable_vblank, |
| |
| .gem_free_object_unlocked = mtk_drm_gem_free_object, |
| .gem_vm_ops = &drm_gem_cma_vm_ops, |
| .dumb_create = mtk_drm_gem_dumb_create, |
| .dumb_map_offset = mtk_drm_gem_dumb_map_offset, |
| .dumb_destroy = drm_gem_dumb_destroy, |
| |
| .prime_handle_to_fd = drm_gem_prime_handle_to_fd, |
| .prime_fd_to_handle = drm_gem_prime_fd_to_handle, |
| .gem_prime_export = drm_gem_prime_export, |
| .gem_prime_import = 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, |
| .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; |
| |
| return 0; |
| |
| err_deinit: |
| mtk_drm_kms_deinit(drm); |
| err_free: |
| drm_dev_unref(drm); |
| return ret; |
| } |
| |
| static void mtk_drm_unbind(struct device *dev) |
| { |
| struct mtk_drm_private *private = dev_get_drvdata(dev); |
| |
| drm_put_dev(private->drm); |
| 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,mt8173-disp-ovl", .data = (void *)MTK_DISP_OVL }, |
| { .compatible = "mediatek,mt8173-disp-rdma", .data = (void *)MTK_DISP_RDMA }, |
| { .compatible = "mediatek,mt8173-disp-wdma", .data = (void *)MTK_DISP_WDMA }, |
| { .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,mt8173-dsi", .data = (void *)MTK_DSI }, |
| { .compatible = "mediatek,mt8173-dpi", .data = (void *)MTK_DPI }, |
| { .compatible = "mediatek,mt8173-disp-mutex", .data = (void *)MTK_DISP_MUTEX }, |
| { .compatible = "mediatek,mt8173-disp-pwm", .data = (void *)MTK_DISP_PWM }, |
| { .compatible = "mediatek,mt8173-disp-od", .data = (void *)MTK_DISP_OD }, |
| { } |
| }; |
| |
| static int mtk_drm_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct mtk_drm_private *private; |
| struct resource *mem; |
| 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; |
| |
| mutex_init(&private->commit.lock); |
| INIT_WORK(&private->commit.work, mtk_atomic_work); |
| |
| mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| private->config_regs = devm_ioremap_resource(dev, mem); |
| if (IS_ERR(private->config_regs)) { |
| ret = PTR_ERR(private->config_regs); |
| dev_err(dev, "Failed to ioremap mmsys-config resource: %d\n", |
| ret); |
| return ret; |
| } |
| |
| /* Iterate over sibling DISP function blocks */ |
| for_each_child_of_node(dev->of_node->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 %s\n", |
| node->full_name); |
| 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 %s\n", |
| node->full_name); |
| continue; |
| } |
| |
| private->comp_node[comp_id] = of_node_get(node); |
| |
| /* |
| * Currently only the 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_OVL || |
| comp_type == MTK_DISP_RDMA || |
| comp_type == MTK_DSI || |
| comp_type == MTK_DPI) { |
| dev_info(dev, "Adding component match for %s\n", |
| node->full_name); |
| 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; |
| goto err_node; |
| } |
| |
| ret = mtk_ddp_comp_init(dev, node, comp, comp_id, NULL); |
| if (ret) |
| 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]); |
| return ret; |
| } |
| |
| static int mtk_drm_remove(struct platform_device *pdev) |
| { |
| struct mtk_drm_private *private = platform_get_drvdata(pdev); |
| struct drm_device *drm = private->drm; |
| int i; |
| |
| drm_dev_unregister(drm); |
| mtk_drm_kms_deinit(drm); |
| drm_dev_unref(drm); |
| |
| 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; |
| |
| drm_kms_helper_poll_disable(drm); |
| |
| private->suspend_state = drm_atomic_helper_suspend(drm); |
| if (IS_ERR(private->suspend_state)) { |
| drm_kms_helper_poll_enable(drm); |
| return PTR_ERR(private->suspend_state); |
| } |
| |
| DRM_DEBUG_DRIVER("mtk_drm_sys_suspend\n"); |
| return 0; |
| } |
| |
| static int mtk_drm_sys_resume(struct device *dev) |
| { |
| struct mtk_drm_private *private = dev_get_drvdata(dev); |
| struct drm_device *drm = private->drm; |
| |
| drm_atomic_helper_resume(drm, private->suspend_state); |
| drm_kms_helper_poll_enable(drm); |
| |
| DRM_DEBUG_DRIVER("mtk_drm_sys_resume\n"); |
| return 0; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend, |
| mtk_drm_sys_resume); |
| |
| static const struct of_device_id mtk_drm_of_ids[] = { |
| { .compatible = "mediatek,mt8173-mmsys", }, |
| { } |
| }; |
| |
| static struct platform_driver mtk_drm_platform_driver = { |
| .probe = mtk_drm_probe, |
| .remove = mtk_drm_remove, |
| .driver = { |
| .name = "mediatek-drm", |
| .of_match_table = mtk_drm_of_ids, |
| .pm = &mtk_drm_pm_ops, |
| }, |
| }; |
| |
| static struct platform_driver * const mtk_drm_drivers[] = { |
| &mtk_ddp_driver, |
| &mtk_disp_ovl_driver, |
| &mtk_disp_rdma_driver, |
| &mtk_dpi_driver, |
| &mtk_drm_platform_driver, |
| &mtk_dsi_driver, |
| &mtk_mipi_tx_driver, |
| }; |
| |
| static int __init mtk_drm_init(void) |
| { |
| int ret; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mtk_drm_drivers); i++) { |
| ret = platform_driver_register(mtk_drm_drivers[i]); |
| if (ret < 0) { |
| pr_err("Failed to register %s driver: %d\n", |
| mtk_drm_drivers[i]->driver.name, ret); |
| goto err; |
| } |
| } |
| |
| return 0; |
| |
| err: |
| while (--i >= 0) |
| platform_driver_unregister(mtk_drm_drivers[i]); |
| |
| return ret; |
| } |
| |
| static void __exit mtk_drm_exit(void) |
| { |
| int i; |
| |
| for (i = ARRAY_SIZE(mtk_drm_drivers) - 1; i >= 0; i--) |
| platform_driver_unregister(mtk_drm_drivers[i]); |
| } |
| |
| 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"); |