diff options
Diffstat (limited to 'drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c new file mode 100644 index 000000000000..30493ce87419 --- /dev/null +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c @@ -0,0 +1,302 @@ +// 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/drm_drv.h> +#include <drm/drm_fbdev_generic.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_module.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_vblank.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_DMA_FOPS(shmob_drm_fops); + +static const struct drm_driver shmob_drm_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET, + DRM_GEM_DMA_DRIVER_OPS, + .fops = &shmob_drm_fops, + .name = "shmob-drm", + .desc = "Renesas SH Mobile DRM", + .date = "20120424", + .major = 1, + .minor = 0, +}; + +/* ----------------------------------------------------------------------------- + * Power management + */ + +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; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(shmob_drm_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); + free_irq(sdev->irq, ddev); + drm_dev_put(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; + 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); + + sdev->mmio = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(sdev->mmio)) + return PTR_ERR(sdev->mmio); + + 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 = platform_get_irq(pdev, 0); + if (ret < 0) + goto err_modeset_cleanup; + sdev->irq = ret; + + ret = request_irq(sdev->irq, shmob_drm_irq, 0, ddev->driver->name, + ddev); + 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; + + drm_fbdev_generic_setup(ddev, 16); + + return 0; + +err_irq_uninstall: + free_irq(sdev->irq, ddev); +err_modeset_cleanup: + drm_kms_helper_poll_fini(ddev); +err_free_drm_dev: + drm_dev_put(ddev); + + return ret; +} + +static struct platform_driver shmob_drm_platform_driver = { + .probe = shmob_drm_probe, + .remove = shmob_drm_remove, + .driver = { + .name = "shmob-drm", + .pm = pm_sleep_ptr(&shmob_drm_pm_ops), + }, +}; + +drm_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"); |