diff options
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_drm_drv.c')
-rw-r--r-- | drivers/gpu/drm/mediatek/mtk_drm_drv.c | 567 |
1 files changed, 567 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c new file mode 100644 index 0000000..b1223d5 --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -0,0 +1,567 @@ +/* + * 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 <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); + + drm_atomic_helper_commit_modeset_disables(drm, state); + drm_atomic_helper_commit_planes(drm, state, false); + drm_atomic_helper_commit_modeset_enables(drm, state); + drm_atomic_helper_wait_for_vblanks(drm, state); + drm_atomic_helper_cleanup_planes(drm, state); + drm_atomic_state_free(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(drm, 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, +#ifdef CONFIG_COMPAT + .compat_ioctl = drm_compat_ioctl, +#endif +}; + +static struct drm_driver mtk_drm_driver = { + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | + DRIVER_ATOMIC, + + .get_vblank_counter = drm_vblank_count, + .enable_vblank = mtk_drm_crtc_enable_vblank, + .disable_vblank = mtk_drm_crtc_disable_vblank, + + .gem_free_object = 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 (!drm) + return -ENOMEM; + + drm_dev_set_unique(drm, dev_name(dev)); + + 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; + + ret = drm_connector_register_all(drm); + if (ret < 0) + goto err_unregister; + + return 0; + +err_unregister: + drm_dev_unregister(drm); +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); + 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_connector_unregister_all(drm); + 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"); |