/* * vsp1_drv.c -- R-Car VSP1 Driver * * Copyright (C) 2013-2015 Renesas Electronics Corporation * * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "vsp1.h" #include "vsp1_bru.h" #include "vsp1_clu.h" #include "vsp1_dl.h" #include "vsp1_drm.h" #include "vsp1_hsit.h" #include "vsp1_lif.h" #include "vsp1_lut.h" #include "vsp1_pipe.h" #include "vsp1_rwpf.h" #include "vsp1_sru.h" #include "vsp1_uds.h" #include "vsp1_video.h" /* ----------------------------------------------------------------------------- * Interrupt Handling */ static irqreturn_t vsp1_irq_handler(int irq, void *data) { u32 mask = VI6_WFP_IRQ_STA_DFE | VI6_WFP_IRQ_STA_FRE; struct vsp1_device *vsp1 = data; irqreturn_t ret = IRQ_NONE; unsigned int i; u32 status; for (i = 0; i < vsp1->info->wpf_count; ++i) { struct vsp1_rwpf *wpf = vsp1->wpf[i]; if (wpf == NULL) continue; status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i)); vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask); if (status & VI6_WFP_IRQ_STA_DFE) { vsp1_pipeline_frame_end(wpf->pipe); ret = IRQ_HANDLED; } } status = vsp1_read(vsp1, VI6_DISP_IRQ_STA); vsp1_write(vsp1, VI6_DISP_IRQ_STA, ~status & VI6_DISP_IRQ_STA_DST); if (status & VI6_DISP_IRQ_STA_DST) { vsp1_drm_display_start(vsp1); ret = IRQ_HANDLED; } return ret; } /* ----------------------------------------------------------------------------- * Entities */ /* * vsp1_create_sink_links - Create links from all sources to the given sink * * This function creates media links from all valid sources to the given sink * pad. Links that would be invalid according to the VSP1 hardware capabilities * are skipped. Those include all links * * - from a UDS to a UDS (UDS entities can't be chained) * - from an entity to itself (no loops are allowed) */ static int vsp1_create_sink_links(struct vsp1_device *vsp1, struct vsp1_entity *sink) { struct media_entity *entity = &sink->subdev.entity; struct vsp1_entity *source; unsigned int pad; int ret; list_for_each_entry(source, &vsp1->entities, list_dev) { u32 flags; if (source->type == sink->type) continue; if (source->type == VSP1_ENTITY_LIF || source->type == VSP1_ENTITY_WPF) continue; flags = source->type == VSP1_ENTITY_RPF && sink->type == VSP1_ENTITY_WPF && source->index == sink->index ? MEDIA_LNK_FL_ENABLED : 0; for (pad = 0; pad < entity->num_pads; ++pad) { if (!(entity->pads[pad].flags & MEDIA_PAD_FL_SINK)) continue; ret = media_create_pad_link(&source->subdev.entity, source->source_pad, entity, pad, flags); if (ret < 0) return ret; if (flags & MEDIA_LNK_FL_ENABLED) source->sink = entity; } } return 0; } static int vsp1_uapi_create_links(struct vsp1_device *vsp1) { struct vsp1_entity *entity; unsigned int i; int ret; list_for_each_entry(entity, &vsp1->entities, list_dev) { if (entity->type == VSP1_ENTITY_LIF || entity->type == VSP1_ENTITY_RPF) continue; ret = vsp1_create_sink_links(vsp1, entity); if (ret < 0) return ret; } if (vsp1->lif) { ret = media_create_pad_link(&vsp1->wpf[0]->entity.subdev.entity, RWPF_PAD_SOURCE, &vsp1->lif->entity.subdev.entity, LIF_PAD_SINK, 0); if (ret < 0) return ret; } for (i = 0; i < vsp1->info->rpf_count; ++i) { struct vsp1_rwpf *rpf = vsp1->rpf[i]; ret = media_create_pad_link(&rpf->video->video.entity, 0, &rpf->entity.subdev.entity, RWPF_PAD_SINK, MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE); if (ret < 0) return ret; } for (i = 0; i < vsp1->info->wpf_count; ++i) { /* Connect the video device to the WPF. All connections are * immutable. */ struct vsp1_rwpf *wpf = vsp1->wpf[i]; ret = media_create_pad_link(&wpf->entity.subdev.entity, RWPF_PAD_SOURCE, &wpf->video->video.entity, 0, MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED); if (ret < 0) return ret; } return 0; } static void vsp1_destroy_entities(struct vsp1_device *vsp1) { struct vsp1_entity *entity, *_entity; struct vsp1_video *video, *_video; list_for_each_entry_safe(entity, _entity, &vsp1->entities, list_dev) { list_del(&entity->list_dev); vsp1_entity_destroy(entity); } list_for_each_entry_safe(video, _video, &vsp1->videos, list) { list_del(&video->list); vsp1_video_cleanup(video); } v4l2_device_unregister(&vsp1->v4l2_dev); if (vsp1->info->uapi) media_device_unregister(&vsp1->media_dev); media_device_cleanup(&vsp1->media_dev); if (!vsp1->info->uapi) vsp1_drm_cleanup(vsp1); } static int vsp1_create_entities(struct vsp1_device *vsp1) { struct media_device *mdev = &vsp1->media_dev; struct v4l2_device *vdev = &vsp1->v4l2_dev; struct vsp1_entity *entity; unsigned int i; int ret; mdev->dev = vsp1->dev; mdev->hw_revision = vsp1->version; strlcpy(mdev->model, vsp1->info->model, sizeof(mdev->model)); snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s", dev_name(mdev->dev)); media_device_init(mdev); vsp1->media_ops.link_setup = vsp1_entity_link_setup; /* Don't perform link validation when the userspace API is disabled as * the pipeline is configured internally by the driver in that case, and * its configuration can thus be trusted. */ if (vsp1->info->uapi) vsp1->media_ops.link_validate = v4l2_subdev_link_validate; vdev->mdev = mdev; ret = v4l2_device_register(vsp1->dev, vdev); if (ret < 0) { dev_err(vsp1->dev, "V4L2 device registration failed (%d)\n", ret); goto done; } /* Instantiate all the entities. */ if (vsp1->info->features & VSP1_HAS_BRU) { vsp1->bru = vsp1_bru_create(vsp1); if (IS_ERR(vsp1->bru)) { ret = PTR_ERR(vsp1->bru); goto done; } list_add_tail(&vsp1->bru->entity.list_dev, &vsp1->entities); } if (vsp1->info->features & VSP1_HAS_CLU) { vsp1->clu = vsp1_clu_create(vsp1); if (IS_ERR(vsp1->clu)) { ret = PTR_ERR(vsp1->clu); goto done; } list_add_tail(&vsp1->clu->entity.list_dev, &vsp1->entities); } vsp1->hsi = vsp1_hsit_create(vsp1, true); if (IS_ERR(vsp1->hsi)) { ret = PTR_ERR(vsp1->hsi); goto done; } list_add_tail(&vsp1->hsi->entity.list_dev, &vsp1->entities); vsp1->hst = vsp1_hsit_create(vsp1, false); if (IS_ERR(vsp1->hst)) { ret = PTR_ERR(vsp1->hst); goto done; } list_add_tail(&vsp1->hst->entity.list_dev, &vsp1->entities); /* The LIF is only supported when used in conjunction with the DU, in * which case the userspace API is disabled. If the userspace API is * enabled skip the LIF, even when present. */ if (vsp1->info->features & VSP1_HAS_LIF && !vsp1->info->uapi) { vsp1->lif = vsp1_lif_create(vsp1); if (IS_ERR(vsp1->lif)) { ret = PTR_ERR(vsp1->lif); goto done; } list_add_tail(&vsp1->lif->entity.list_dev, &vsp1->entities); } if (vsp1->info->features & VSP1_HAS_LUT) { vsp1->lut = vsp1_lut_create(vsp1); if (IS_ERR(vsp1->lut)) { ret = PTR_ERR(vsp1->lut); goto done; } list_add_tail(&vsp1->lut->entity.list_dev, &vsp1->entities); } for (i = 0; i < vsp1->info->rpf_count; ++i) { struct vsp1_rwpf *rpf; rpf = vsp1_rpf_create(vsp1, i); if (IS_ERR(rpf)) { ret = PTR_ERR(rpf); goto done; } vsp1->rpf[i] = rpf; list_add_tail(&rpf->entity.list_dev, &vsp1->entities); if (vsp1->info->uapi) { struct vsp1_video *video = vsp1_video_create(vsp1, rpf); if (IS_ERR(video)) { ret = PTR_ERR(video); goto done; } list_add_tail(&video->list, &vsp1->videos); } } if (vsp1->info->features & VSP1_HAS_SRU) { vsp1->sru = vsp1_sru_create(vsp1); if (IS_ERR(vsp1->sru)) { ret = PTR_ERR(vsp1->sru); goto done; } list_add_tail(&vsp1->sru->entity.list_dev, &vsp1->entities); } for (i = 0; i < vsp1->info->uds_count; ++i) { struct vsp1_uds *uds; uds = vsp1_uds_create(vsp1, i); if (IS_ERR(uds)) { ret = PTR_ERR(uds); goto done; } vsp1->uds[i] = uds; list_add_tail(&uds->entity.list_dev, &vsp1->entities); } for (i = 0; i < vsp1->info->wpf_count; ++i) { struct vsp1_rwpf *wpf; wpf = vsp1_wpf_create(vsp1, i); if (IS_ERR(wpf)) { ret = PTR_ERR(wpf); goto done; } vsp1->wpf[i] = wpf; list_add_tail(&wpf->entity.list_dev, &vsp1->entities); if (vsp1->info->uapi) { struct vsp1_video *video = vsp1_video_create(vsp1, wpf); if (IS_ERR(video)) { ret = PTR_ERR(video); goto done; } list_add_tail(&video->list, &vsp1->videos); wpf->entity.sink = &video->video.entity; } } /* Register all subdevs. */ list_for_each_entry(entity, &vsp1->entities, list_dev) { ret = v4l2_device_register_subdev(&vsp1->v4l2_dev, &entity->subdev); if (ret < 0) goto done; } /* Create links. */ if (vsp1->info->uapi) ret = vsp1_uapi_create_links(vsp1); else ret = vsp1_drm_create_links(vsp1); if (ret < 0) goto done; /* Register subdev nodes if the userspace API is enabled or initialize * the DRM pipeline otherwise. */ if (vsp1->info->uapi) { ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev); if (ret < 0) goto done; ret = media_device_register(mdev); } else { ret = vsp1_drm_init(vsp1); } done: if (ret < 0) vsp1_destroy_entities(vsp1); return ret; } int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned int index) { unsigned int timeout; u32 status; status = vsp1_read(vsp1, VI6_STATUS); if (!(status & VI6_STATUS_SYS_ACT(index))) return 0; vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(index)); for (timeout = 10; timeout > 0; --timeout) { status = vsp1_read(vsp1, VI6_STATUS); if (!(status & VI6_STATUS_SYS_ACT(index))) break; usleep_range(1000, 2000); } if (!timeout) { dev_err(vsp1->dev, "failed to reset wpf.%u\n", index); return -ETIMEDOUT; } return 0; } static int vsp1_device_init(struct vsp1_device *vsp1) { unsigned int i; int ret; /* Reset any channel that might be running. */ for (i = 0; i < vsp1->info->wpf_count; ++i) { ret = vsp1_reset_wpf(vsp1, i); if (ret < 0) return ret; } vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) | (8 << VI6_CLK_DCSWT_CSTRW_SHIFT)); for (i = 0; i < vsp1->info->rpf_count; ++i) vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED); for (i = 0; i < vsp1->info->uds_count; ++i) vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED); vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED); vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED); vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED); vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED); vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED); vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED); vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) | (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT)); vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) | (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT)); vsp1_dlm_setup(vsp1); return 0; } /* * vsp1_device_get - Acquire the VSP1 device * * Make sure the device is not suspended and initialize it if needed. * * Return 0 on success or a negative error code otherwise. */ int vsp1_device_get(struct vsp1_device *vsp1) { int ret; ret = pm_runtime_get_sync(vsp1->dev); if (ret < 0) { pm_runtime_put_noidle(vsp1->dev); return ret; } return 0; } /* * vsp1_device_put - Release the VSP1 device * * Decrement the VSP1 reference count and cleanup the device if the last * reference is released. */ void vsp1_device_put(struct vsp1_device *vsp1) { pm_runtime_put_sync(vsp1->dev); } /* ----------------------------------------------------------------------------- * Power Management */ static int __maybe_unused vsp1_pm_suspend(struct device *dev) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); /* * When used as part of a display pipeline, the VSP is stopped and * restarted explicitly by the DU. */ if (!vsp1->drm) vsp1_pipelines_suspend(vsp1); pm_runtime_force_suspend(vsp1->dev); return 0; } static int __maybe_unused vsp1_pm_resume(struct device *dev) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); pm_runtime_force_resume(vsp1->dev); /* * When used as part of a display pipeline, the VSP is stopped and * restarted explicitly by the DU. */ if (!vsp1->drm) vsp1_pipelines_resume(vsp1); return 0; } static int __maybe_unused vsp1_pm_runtime_suspend(struct device *dev) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); rcar_fcp_disable(vsp1->fcp); return 0; } static int __maybe_unused vsp1_pm_runtime_resume(struct device *dev) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); int ret; if (vsp1->info) { ret = vsp1_device_init(vsp1); if (ret < 0) return ret; } return rcar_fcp_enable(vsp1->fcp); } static const struct dev_pm_ops vsp1_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume) SET_RUNTIME_PM_OPS(vsp1_pm_runtime_suspend, vsp1_pm_runtime_resume, NULL) }; /* ----------------------------------------------------------------------------- * Platform Driver */ static const struct vsp1_device_info vsp1_device_infos[] = { { .version = VI6_IP_VERSION_MODEL_VSPS_H2, .model = "VSP1-S", .gen = 2, .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP, .rpf_count = 5, .uds_count = 3, .wpf_count = 4, .num_bru_inputs = 4, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPR_H2, .model = "VSP1-R", .gen = 2, .features = VSP1_HAS_BRU | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP, .rpf_count = 5, .uds_count = 3, .wpf_count = 4, .num_bru_inputs = 4, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPD_GEN2, .model = "VSP1-D", .gen = 2, .features = VSP1_HAS_BRU | VSP1_HAS_LIF | VSP1_HAS_LUT, .rpf_count = 4, .uds_count = 1, .wpf_count = 1, .num_bru_inputs = 4, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPS_M2, .model = "VSP1-S", .gen = 2, .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP, .rpf_count = 5, .uds_count = 1, .wpf_count = 4, .num_bru_inputs = 4, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPS_V2H, .model = "VSP1V-S", .gen = 2, .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP, .rpf_count = 4, .uds_count = 1, .wpf_count = 4, .num_bru_inputs = 4, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPD_V2H, .model = "VSP1V-D", .gen = 2, .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT | VSP1_HAS_LIF, .rpf_count = 4, .uds_count = 1, .wpf_count = 1, .num_bru_inputs = 4, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPI_GEN3, .model = "VSP2-I", .gen = 3, .features = VSP1_HAS_CLU | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_HFLIP | VSP1_HAS_WPF_VFLIP, .rpf_count = 1, .uds_count = 1, .wpf_count = 1, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPBD_GEN3, .model = "VSP2-BD", .gen = 3, .features = VSP1_HAS_BRU | VSP1_HAS_WPF_VFLIP, .rpf_count = 5, .wpf_count = 1, .num_bru_inputs = 5, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPBC_GEN3, .model = "VSP2-BC", .gen = 3, .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_LUT | VSP1_HAS_WPF_VFLIP, .rpf_count = 5, .wpf_count = 1, .num_bru_inputs = 5, .uapi = true, }, { .version = VI6_IP_VERSION_MODEL_VSPD_GEN3, .model = "VSP2-D", .gen = 3, .features = VSP1_HAS_BRU | VSP1_HAS_LIF | VSP1_HAS_WPF_VFLIP, .rpf_count = 5, .wpf_count = 2, .num_bru_inputs = 5, }, }; static int vsp1_probe(struct platform_device *pdev) { struct vsp1_device *vsp1; struct device_node *fcp_node; struct resource *irq; struct resource *io; unsigned int i; int ret; vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL); if (vsp1 == NULL) return -ENOMEM; vsp1->dev = &pdev->dev; INIT_LIST_HEAD(&vsp1->entities); INIT_LIST_HEAD(&vsp1->videos); platform_set_drvdata(pdev, vsp1); /* I/O and IRQ resources (clock managed by the clock PM domain) */ io = platform_get_resource(pdev, IORESOURCE_MEM, 0); vsp1->mmio = devm_ioremap_resource(&pdev->dev, io); if (IS_ERR(vsp1->mmio)) return PTR_ERR(vsp1->mmio); irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!irq) { dev_err(&pdev->dev, "missing IRQ\n"); return -EINVAL; } ret = devm_request_irq(&pdev->dev, irq->start, vsp1_irq_handler, IRQF_SHARED, dev_name(&pdev->dev), vsp1); if (ret < 0) { dev_err(&pdev->dev, "failed to request IRQ\n"); return ret; } /* FCP (optional) */ fcp_node = of_parse_phandle(pdev->dev.of_node, "renesas,fcp", 0); if (fcp_node) { vsp1->fcp = rcar_fcp_get(fcp_node); of_node_put(fcp_node); if (IS_ERR(vsp1->fcp)) { dev_dbg(&pdev->dev, "FCP not found (%ld)\n", PTR_ERR(vsp1->fcp)); return PTR_ERR(vsp1->fcp); } } /* Configure device parameters based on the version register. */ pm_runtime_enable(&pdev->dev); ret = vsp1_device_get(vsp1); if (ret < 0) goto done; vsp1->version = vsp1_read(vsp1, VI6_IP_VERSION); vsp1_device_put(vsp1); for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) { if ((vsp1->version & VI6_IP_VERSION_MODEL_MASK) == vsp1_device_infos[i].version) { vsp1->info = &vsp1_device_infos[i]; break; } } if (!vsp1->info) { dev_err(&pdev->dev, "unsupported IP version 0x%08x\n", vsp1->version); ret = -ENXIO; goto done; } dev_dbg(&pdev->dev, "IP version 0x%08x\n", vsp1->version); /* Instanciate entities */ ret = vsp1_create_entities(vsp1); if (ret < 0) { dev_err(&pdev->dev, "failed to create entities\n"); goto done; } done: if (ret) pm_runtime_disable(&pdev->dev); return ret; } static int vsp1_remove(struct platform_device *pdev) { struct vsp1_device *vsp1 = platform_get_drvdata(pdev); vsp1_destroy_entities(vsp1); rcar_fcp_put(vsp1->fcp); pm_runtime_disable(&pdev->dev); return 0; } static const struct of_device_id vsp1_of_match[] = { { .compatible = "renesas,vsp1" }, { .compatible = "renesas,vsp2" }, { }, }; static struct platform_driver vsp1_platform_driver = { .probe = vsp1_probe, .remove = vsp1_remove, .driver = { .name = "vsp1", .pm = &vsp1_pm_ops, .of_match_table = vsp1_of_match, }, }; module_platform_driver(vsp1_platform_driver); MODULE_ALIAS("vsp1"); MODULE_AUTHOR("Laurent Pinchart "); MODULE_DESCRIPTION("Renesas VSP1 Driver"); MODULE_LICENSE("GPL");