| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * shmob_drm_drv.c -- SH Mobile DRM driver |
| * |
| * Copyright (C) 2012 Renesas Electronics Corporation |
| * |
| * Laurent Pinchart (laurent.pinchart@ideasonboard.com) |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/io.h> |
| #include <linux/mm.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm.h> |
| #include <linux/slab.h> |
| |
| #include <drm/drmP.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_gem_cma_helper.h> |
| |
| #include "shmob_drm_drv.h" |
| #include "shmob_drm_kms.h" |
| #include "shmob_drm_plane.h" |
| #include "shmob_drm_regs.h" |
| |
| /* ----------------------------------------------------------------------------- |
| * Hardware initialization |
| */ |
| |
| static int shmob_drm_init_interface(struct shmob_drm_device *sdev) |
| { |
| static const u32 ldmt1r[] = { |
| [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8, |
| [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9, |
| [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A, |
| [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B, |
| [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16, |
| [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18, |
| [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24, |
| [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR, |
| [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A, |
| [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B, |
| [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C, |
| [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D, |
| [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9, |
| [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12, |
| [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A, |
| [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B, |
| [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C, |
| [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18, |
| [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24, |
| }; |
| |
| if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) { |
| dev_err(sdev->dev, "invalid interface type %u\n", |
| sdev->pdata->iface.interface); |
| return -EINVAL; |
| } |
| |
| sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface]; |
| return 0; |
| } |
| |
| static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev, |
| enum shmob_drm_clk_source clksrc) |
| { |
| struct clk *clk; |
| char *clkname; |
| |
| switch (clksrc) { |
| case SHMOB_DRM_CLK_BUS: |
| clkname = "bus_clk"; |
| sdev->lddckr = LDDCKR_ICKSEL_BUS; |
| break; |
| case SHMOB_DRM_CLK_PERIPHERAL: |
| clkname = "peripheral_clk"; |
| sdev->lddckr = LDDCKR_ICKSEL_MIPI; |
| break; |
| case SHMOB_DRM_CLK_EXTERNAL: |
| clkname = NULL; |
| sdev->lddckr = LDDCKR_ICKSEL_HDMI; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| clk = devm_clk_get(sdev->dev, clkname); |
| if (IS_ERR(clk)) { |
| dev_err(sdev->dev, "cannot get dot clock %s\n", clkname); |
| return PTR_ERR(clk); |
| } |
| |
| sdev->clock = clk; |
| return 0; |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * DRM operations |
| */ |
| |
| static irqreturn_t shmob_drm_irq(int irq, void *arg) |
| { |
| struct drm_device *dev = arg; |
| struct shmob_drm_device *sdev = dev->dev_private; |
| unsigned long flags; |
| u32 status; |
| |
| /* Acknowledge interrupts. Putting interrupt enable and interrupt flag |
| * bits in the same register is really brain-dead design and requires |
| * taking a spinlock. |
| */ |
| spin_lock_irqsave(&sdev->irq_lock, flags); |
| status = lcdc_read(sdev, LDINTR); |
| lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK); |
| spin_unlock_irqrestore(&sdev->irq_lock, flags); |
| |
| if (status & LDINTR_VES) { |
| drm_handle_vblank(dev, 0); |
| shmob_drm_crtc_finish_page_flip(&sdev->crtc); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| DEFINE_DRM_GEM_CMA_FOPS(shmob_drm_fops); |
| |
| static struct drm_driver shmob_drm_driver = { |
| .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET |
| | DRIVER_PRIME, |
| .irq_handler = shmob_drm_irq, |
| .gem_free_object_unlocked = drm_gem_cma_free_object, |
| .gem_vm_ops = &drm_gem_cma_vm_ops, |
| .prime_handle_to_fd = drm_gem_prime_handle_to_fd, |
| .prime_fd_to_handle = drm_gem_prime_fd_to_handle, |
| .gem_prime_import = drm_gem_prime_import, |
| .gem_prime_export = drm_gem_prime_export, |
| .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, |
| .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, |
| .gem_prime_vmap = drm_gem_cma_prime_vmap, |
| .gem_prime_vunmap = drm_gem_cma_prime_vunmap, |
| .gem_prime_mmap = drm_gem_cma_prime_mmap, |
| .dumb_create = drm_gem_cma_dumb_create, |
| .fops = &shmob_drm_fops, |
| .name = "shmob-drm", |
| .desc = "Renesas SH Mobile DRM", |
| .date = "20120424", |
| .major = 1, |
| .minor = 0, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * Power management |
| */ |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int shmob_drm_pm_suspend(struct device *dev) |
| { |
| struct shmob_drm_device *sdev = dev_get_drvdata(dev); |
| |
| drm_kms_helper_poll_disable(sdev->ddev); |
| shmob_drm_crtc_suspend(&sdev->crtc); |
| |
| return 0; |
| } |
| |
| static int shmob_drm_pm_resume(struct device *dev) |
| { |
| struct shmob_drm_device *sdev = dev_get_drvdata(dev); |
| |
| drm_modeset_lock_all(sdev->ddev); |
| shmob_drm_crtc_resume(&sdev->crtc); |
| drm_modeset_unlock_all(sdev->ddev); |
| |
| drm_kms_helper_poll_enable(sdev->ddev); |
| return 0; |
| } |
| #endif |
| |
| static const struct dev_pm_ops shmob_drm_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume) |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * Platform driver |
| */ |
| |
| static int shmob_drm_remove(struct platform_device *pdev) |
| { |
| struct shmob_drm_device *sdev = platform_get_drvdata(pdev); |
| struct drm_device *ddev = sdev->ddev; |
| |
| drm_dev_unregister(ddev); |
| drm_kms_helper_poll_fini(ddev); |
| drm_mode_config_cleanup(ddev); |
| drm_irq_uninstall(ddev); |
| drm_dev_unref(ddev); |
| |
| return 0; |
| } |
| |
| static int shmob_drm_probe(struct platform_device *pdev) |
| { |
| struct shmob_drm_platform_data *pdata = pdev->dev.platform_data; |
| struct shmob_drm_device *sdev; |
| struct drm_device *ddev; |
| struct resource *res; |
| unsigned int i; |
| int ret; |
| |
| if (pdata == NULL) { |
| dev_err(&pdev->dev, "no platform data\n"); |
| return -EINVAL; |
| } |
| |
| /* |
| * Allocate and initialize the driver private data, I/O resources and |
| * clocks. |
| */ |
| sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL); |
| if (sdev == NULL) |
| return -ENOMEM; |
| |
| sdev->dev = &pdev->dev; |
| sdev->pdata = pdata; |
| spin_lock_init(&sdev->irq_lock); |
| |
| platform_set_drvdata(pdev, sdev); |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| sdev->mmio = devm_ioremap_resource(&pdev->dev, res); |
| if (sdev->mmio == NULL) |
| return -ENOMEM; |
| |
| ret = shmob_drm_setup_clocks(sdev, pdata->clk_source); |
| if (ret < 0) |
| return ret; |
| |
| ret = shmob_drm_init_interface(sdev); |
| if (ret < 0) |
| return ret; |
| |
| /* Allocate and initialize the DRM device. */ |
| ddev = drm_dev_alloc(&shmob_drm_driver, &pdev->dev); |
| if (IS_ERR(ddev)) |
| return PTR_ERR(ddev); |
| |
| sdev->ddev = ddev; |
| ddev->dev_private = sdev; |
| |
| ret = shmob_drm_modeset_init(sdev); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "failed to initialize mode setting\n"); |
| goto err_free_drm_dev; |
| } |
| |
| for (i = 0; i < 4; ++i) { |
| ret = shmob_drm_plane_create(sdev, i); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "failed to create plane %u\n", i); |
| goto err_modeset_cleanup; |
| } |
| } |
| |
| ret = drm_vblank_init(ddev, 1); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "failed to initialize vblank\n"); |
| goto err_modeset_cleanup; |
| } |
| |
| ret = drm_irq_install(ddev, platform_get_irq(pdev, 0)); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "failed to install IRQ handler\n"); |
| goto err_modeset_cleanup; |
| } |
| |
| /* |
| * Register the DRM device with the core and the connectors with |
| * sysfs. |
| */ |
| ret = drm_dev_register(ddev, 0); |
| if (ret < 0) |
| goto err_irq_uninstall; |
| |
| return 0; |
| |
| err_irq_uninstall: |
| drm_irq_uninstall(ddev); |
| err_modeset_cleanup: |
| drm_kms_helper_poll_fini(ddev); |
| drm_mode_config_cleanup(ddev); |
| err_free_drm_dev: |
| drm_dev_unref(ddev); |
| |
| return ret; |
| } |
| |
| static struct platform_driver shmob_drm_platform_driver = { |
| .probe = shmob_drm_probe, |
| .remove = shmob_drm_remove, |
| .driver = { |
| .name = "shmob-drm", |
| .pm = &shmob_drm_pm_ops, |
| }, |
| }; |
| |
| module_platform_driver(shmob_drm_platform_driver); |
| |
| MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); |
| MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver"); |
| MODULE_LICENSE("GPL"); |