Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Marek Vašut | 1452 | 88.54% | 4 | 40.00% |
Liu Ying | 178 | 10.85% | 2 | 20.00% |
Danilo Krummrich | 3 | 0.18% | 1 | 10.00% |
Kieran Bingham | 3 | 0.18% | 1 | 10.00% |
Thomas Zimmermann | 2 | 0.12% | 1 | 10.00% |
Uwe Kleine-König | 2 | 0.12% | 1 | 10.00% |
Total | 1640 | 10 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2022 Marek Vasut <marex@denx.de> * * This code is based on drivers/gpu/drm/mxsfb/mxsfb* */ #include <linux/clk.h> #include <linux/dma-mapping.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_drv.h> #include <drm/drm_encoder.h> #include <drm/drm_fbdev_dma.h> #include <drm/drm_gem_dma_helper.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_mode_config.h> #include <drm/drm_module.h> #include <drm/drm_of.h> #include <drm/drm_probe_helper.h> #include <drm/drm_vblank.h> #include "lcdif_drv.h" #include "lcdif_regs.h" static const struct drm_mode_config_funcs lcdif_mode_config_funcs = { .fb_create = drm_gem_fb_create, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, }; static const struct drm_mode_config_helper_funcs lcdif_mode_config_helpers = { .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm, }; static const struct drm_encoder_funcs lcdif_encoder_funcs = { .destroy = drm_encoder_cleanup, }; static int lcdif_attach_bridge(struct lcdif_drm_private *lcdif) { struct device *dev = lcdif->drm->dev; struct device_node *ep; struct drm_bridge *bridge; int ret; for_each_endpoint_of_node(dev->of_node, ep) { struct device_node *remote; struct of_endpoint of_ep; struct drm_encoder *encoder; remote = of_graph_get_remote_port_parent(ep); if (!of_device_is_available(remote)) { of_node_put(remote); continue; } of_node_put(remote); ret = of_graph_parse_endpoint(ep, &of_ep); if (ret < 0) { dev_err(dev, "Failed to parse endpoint %pOF\n", ep); of_node_put(ep); return ret; } bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, of_ep.id); if (IS_ERR(bridge)) { of_node_put(ep); return dev_err_probe(dev, PTR_ERR(bridge), "Failed to get bridge for endpoint%u\n", of_ep.id); } encoder = devm_kzalloc(dev, sizeof(*encoder), GFP_KERNEL); if (!encoder) { dev_err(dev, "Failed to allocate encoder for endpoint%u\n", of_ep.id); of_node_put(ep); return -ENOMEM; } encoder->possible_crtcs = drm_crtc_mask(&lcdif->crtc); ret = drm_encoder_init(lcdif->drm, encoder, &lcdif_encoder_funcs, DRM_MODE_ENCODER_NONE, NULL); if (ret) { dev_err(dev, "Failed to initialize encoder for endpoint%u: %d\n", of_ep.id, ret); of_node_put(ep); return ret; } ret = drm_bridge_attach(encoder, bridge, NULL, 0); if (ret) { of_node_put(ep); return dev_err_probe(dev, ret, "Failed to attach bridge for endpoint%u\n", of_ep.id); } } return 0; } static irqreturn_t lcdif_irq_handler(int irq, void *data) { struct drm_device *drm = data; struct lcdif_drm_private *lcdif = drm->dev_private; u32 reg, stat; stat = readl(lcdif->base + LCDC_V8_INT_STATUS_D0); if (!stat) return IRQ_NONE; if (stat & INT_STATUS_D0_VS_BLANK) { reg = readl(lcdif->base + LCDC_V8_CTRLDESCL0_5); if (!(reg & CTRLDESCL0_5_SHADOW_LOAD_EN)) drm_crtc_handle_vblank(&lcdif->crtc); } writel(stat, lcdif->base + LCDC_V8_INT_STATUS_D0); return IRQ_HANDLED; } static int lcdif_load(struct drm_device *drm) { struct platform_device *pdev = to_platform_device(drm->dev); struct lcdif_drm_private *lcdif; struct resource *res; int ret; lcdif = devm_kzalloc(&pdev->dev, sizeof(*lcdif), GFP_KERNEL); if (!lcdif) return -ENOMEM; lcdif->drm = drm; drm->dev_private = lcdif; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); lcdif->base = devm_ioremap_resource(drm->dev, res); if (IS_ERR(lcdif->base)) return PTR_ERR(lcdif->base); lcdif->clk = devm_clk_get(drm->dev, "pix"); if (IS_ERR(lcdif->clk)) return PTR_ERR(lcdif->clk); lcdif->clk_axi = devm_clk_get(drm->dev, "axi"); if (IS_ERR(lcdif->clk_axi)) return PTR_ERR(lcdif->clk_axi); lcdif->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi"); if (IS_ERR(lcdif->clk_disp_axi)) return PTR_ERR(lcdif->clk_disp_axi); platform_set_drvdata(pdev, drm); ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(36)); if (ret) return ret; /* Modeset init */ ret = drmm_mode_config_init(drm); if (ret) { dev_err(drm->dev, "Failed to initialize mode config\n"); return ret; } ret = lcdif_kms_init(lcdif); if (ret < 0) { dev_err(drm->dev, "Failed to initialize KMS pipeline\n"); return ret; } ret = drm_vblank_init(drm, drm->mode_config.num_crtc); if (ret < 0) { dev_err(drm->dev, "Failed to initialise vblank\n"); return ret; } /* Start with vertical blanking interrupt reporting disabled. */ drm_crtc_vblank_off(&lcdif->crtc); ret = lcdif_attach_bridge(lcdif); if (ret) return dev_err_probe(drm->dev, ret, "Cannot connect bridge\n"); drm->mode_config.min_width = LCDIF_MIN_XRES; drm->mode_config.min_height = LCDIF_MIN_YRES; drm->mode_config.max_width = LCDIF_MAX_XRES; drm->mode_config.max_height = LCDIF_MAX_YRES; drm->mode_config.funcs = &lcdif_mode_config_funcs; drm->mode_config.helper_private = &lcdif_mode_config_helpers; drm_mode_config_reset(drm); ret = platform_get_irq(pdev, 0); if (ret < 0) return ret; lcdif->irq = ret; ret = devm_request_irq(drm->dev, lcdif->irq, lcdif_irq_handler, 0, drm->driver->name, drm); if (ret < 0) { dev_err(drm->dev, "Failed to install IRQ handler\n"); return ret; } drm_kms_helper_poll_init(drm); drm_helper_hpd_irq_event(drm); pm_runtime_enable(drm->dev); return 0; } static void lcdif_unload(struct drm_device *drm) { struct lcdif_drm_private *lcdif = drm->dev_private; pm_runtime_get_sync(drm->dev); drm_crtc_vblank_off(&lcdif->crtc); drm_kms_helper_poll_fini(drm); pm_runtime_put_sync(drm->dev); pm_runtime_disable(drm->dev); drm->dev_private = NULL; } DEFINE_DRM_GEM_DMA_FOPS(fops); static const struct drm_driver lcdif_driver = { .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, DRM_GEM_DMA_DRIVER_OPS, .fops = &fops, .name = "imx-lcdif", .desc = "i.MX LCDIF Controller DRM", .date = "20220417", .major = 1, .minor = 0, }; static const struct of_device_id lcdif_dt_ids[] = { { .compatible = "fsl,imx8mp-lcdif" }, { .compatible = "fsl,imx93-lcdif" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, lcdif_dt_ids); static int lcdif_probe(struct platform_device *pdev) { struct drm_device *drm; int ret; drm = drm_dev_alloc(&lcdif_driver, &pdev->dev); if (IS_ERR(drm)) return PTR_ERR(drm); ret = lcdif_load(drm); if (ret) goto err_free; ret = drm_dev_register(drm, 0); if (ret) goto err_unload; drm_fbdev_dma_setup(drm, 32); return 0; err_unload: lcdif_unload(drm); err_free: drm_dev_put(drm); return ret; } static void lcdif_remove(struct platform_device *pdev) { struct drm_device *drm = platform_get_drvdata(pdev); drm_dev_unregister(drm); drm_atomic_helper_shutdown(drm); lcdif_unload(drm); drm_dev_put(drm); } static void lcdif_shutdown(struct platform_device *pdev) { struct drm_device *drm = platform_get_drvdata(pdev); drm_atomic_helper_shutdown(drm); } static int __maybe_unused lcdif_rpm_suspend(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); struct lcdif_drm_private *lcdif = drm->dev_private; /* These clock supply the DISPLAY CLOCK Domain */ clk_disable_unprepare(lcdif->clk); /* These clock supply the System Bus, AXI, Write Path, LFIFO */ clk_disable_unprepare(lcdif->clk_disp_axi); /* These clock supply the Control Bus, APB, APBH Ctrl Registers */ clk_disable_unprepare(lcdif->clk_axi); return 0; } static int __maybe_unused lcdif_rpm_resume(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); struct lcdif_drm_private *lcdif = drm->dev_private; /* These clock supply the Control Bus, APB, APBH Ctrl Registers */ clk_prepare_enable(lcdif->clk_axi); /* These clock supply the System Bus, AXI, Write Path, LFIFO */ clk_prepare_enable(lcdif->clk_disp_axi); /* These clock supply the DISPLAY CLOCK Domain */ clk_prepare_enable(lcdif->clk); return 0; } static int __maybe_unused lcdif_suspend(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); int ret; ret = drm_mode_config_helper_suspend(drm); if (ret) return ret; if (pm_runtime_suspended(dev)) return 0; return lcdif_rpm_suspend(dev); } static int __maybe_unused lcdif_resume(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); if (!pm_runtime_suspended(dev)) lcdif_rpm_resume(dev); return drm_mode_config_helper_resume(drm); } static const struct dev_pm_ops lcdif_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(lcdif_suspend, lcdif_resume) SET_RUNTIME_PM_OPS(lcdif_rpm_suspend, lcdif_rpm_resume, NULL) }; static struct platform_driver lcdif_platform_driver = { .probe = lcdif_probe, .remove_new = lcdif_remove, .shutdown = lcdif_shutdown, .driver = { .name = "imx-lcdif", .of_match_table = lcdif_dt_ids, .pm = &lcdif_pm_ops, }, }; drm_module_platform_driver(lcdif_platform_driver); MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); MODULE_DESCRIPTION("Freescale LCDIF DRM/KMS driver"); MODULE_LICENSE("GPL");
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