diff options
Diffstat (limited to 'drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 404 |
1 files changed, 404 insertions, 0 deletions
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c new file mode 100644 index 000000000000..9a8e2da47158 --- /dev/null +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c @@ -0,0 +1,404 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * Freescale DCU drm device driver + * + * 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 <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_gem_cma_helper.h> + +#include "fsl_dcu_drm_crtc.h" +#include "fsl_dcu_drm_drv.h" + +static const struct regmap_config fsl_dcu_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .cache_type = REGCACHE_RBTREE, +}; + +static int fsl_dcu_drm_irq_init(struct drm_device *dev) +{ + struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; + unsigned int value; + int ret; + + ret = drm_irq_install(dev, fsl_dev->irq); + if (ret < 0) + dev_err(dev->dev, "failed to install IRQ handler\n"); + + ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0); + if (ret) + dev_err(dev->dev, "set DCU_INT_STATUS failed\n"); + ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); + if (ret) + dev_err(dev->dev, "read DCU_INT_MASK failed\n"); + value &= DCU_INT_MASK_VBLANK; + ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); + if (ret) + dev_err(dev->dev, "set DCU_INT_MASK failed\n"); + ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, + DCU_UPDATE_MODE_READREG); + if (ret) + dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n"); + + return ret; +} + +static int fsl_dcu_load(struct drm_device *drm, unsigned long flags) +{ + struct device *dev = drm->dev; + struct fsl_dcu_drm_device *fsl_dev = drm->dev_private; + int ret; + + ret = fsl_dcu_drm_modeset_init(fsl_dev); + if (ret < 0) { + dev_err(dev, "failed to initialize mode setting\n"); + return ret; + } + + ret = drm_vblank_init(drm, drm->mode_config.num_crtc); + if (ret < 0) { + dev_err(dev, "failed to initialize vblank\n"); + goto done; + } + drm->vblank_disable_allowed = true; + + ret = fsl_dcu_drm_irq_init(drm); + if (ret < 0) + goto done; + drm->irq_enabled = true; + + fsl_dcu_fbdev_init(drm); + + return 0; +done: + if (ret) { + drm_mode_config_cleanup(drm); + drm_vblank_cleanup(drm); + drm_irq_uninstall(drm); + drm->dev_private = NULL; + } + + return ret; +} + +static int fsl_dcu_unload(struct drm_device *dev) +{ + drm_mode_config_cleanup(dev); + drm_vblank_cleanup(dev); + drm_irq_uninstall(dev); + + dev->dev_private = NULL; + + return 0; +} + +static void fsl_dcu_drm_preclose(struct drm_device *dev, struct drm_file *file) +{ +} + +static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg) +{ + struct drm_device *dev = arg; + struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; + unsigned int int_status; + int ret; + + ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status); + if (ret) + dev_err(dev->dev, "set DCU_INT_STATUS failed\n"); + if (int_status & DCU_INT_STATUS_VBLANK) + drm_handle_vblank(dev, 0); + + ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff); + if (ret) + dev_err(dev->dev, "set DCU_INT_STATUS failed\n"); + ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, + DCU_UPDATE_MODE_READREG); + if (ret) + dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n"); + + return IRQ_HANDLED; +} + +static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, int crtc) +{ + struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; + unsigned int value; + int ret; + + ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); + if (ret) + dev_err(dev->dev, "read DCU_INT_MASK failed\n"); + value &= ~DCU_INT_MASK_VBLANK; + ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); + if (ret) + dev_err(dev->dev, "set DCU_INT_MASK failed\n"); + return 0; +} + +static void fsl_dcu_drm_disable_vblank(struct drm_device *dev, int crtc) +{ + struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; + unsigned int value; + int ret; + + ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); + if (ret) + dev_err(dev->dev, "read DCU_INT_MASK failed\n"); + value |= DCU_INT_MASK_VBLANK; + ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); + if (ret) + dev_err(dev->dev, "set DCU_INT_MASK failed\n"); +} + +static const struct file_operations fsl_dcu_drm_fops = { + .owner = THIS_MODULE, + .open = drm_open, + .release = drm_release, + .unlocked_ioctl = drm_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = drm_compat_ioctl, +#endif + .poll = drm_poll, + .read = drm_read, + .llseek = no_llseek, + .mmap = drm_gem_cma_mmap, +}; + +static struct drm_driver fsl_dcu_drm_driver = { + .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET + | DRIVER_PRIME | DRIVER_ATOMIC, + .load = fsl_dcu_load, + .unload = fsl_dcu_unload, + .preclose = fsl_dcu_drm_preclose, + .irq_handler = fsl_dcu_drm_irq, + .get_vblank_counter = drm_vblank_count, + .enable_vblank = fsl_dcu_drm_enable_vblank, + .disable_vblank = fsl_dcu_drm_disable_vblank, + .gem_free_object = 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, + .dumb_map_offset = drm_gem_cma_dumb_map_offset, + .dumb_destroy = drm_gem_dumb_destroy, + .fops = &fsl_dcu_drm_fops, + .name = "fsl-dcu-drm", + .desc = "Freescale DCU DRM", + .date = "20150213", + .major = 1, + .minor = 0, +}; + +#ifdef CONFIG_PM_SLEEP +static int fsl_dcu_drm_pm_suspend(struct device *dev) +{ + struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev); + + if (!fsl_dev) + return 0; + + drm_kms_helper_poll_disable(fsl_dev->drm); + regcache_cache_only(fsl_dev->regmap, true); + regcache_mark_dirty(fsl_dev->regmap); + clk_disable(fsl_dev->clk); + clk_unprepare(fsl_dev->clk); + + return 0; +} + +static int fsl_dcu_drm_pm_resume(struct device *dev) +{ + struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev); + int ret; + + if (!fsl_dev) + return 0; + + ret = clk_enable(fsl_dev->clk); + if (ret < 0) { + dev_err(dev, "failed to enable dcu clk\n"); + clk_unprepare(fsl_dev->clk); + return ret; + } + ret = clk_prepare(fsl_dev->clk); + if (ret < 0) { + dev_err(dev, "failed to prepare dcu clk\n"); + return ret; + } + + drm_kms_helper_poll_enable(fsl_dev->drm); + regcache_cache_only(fsl_dev->regmap, false); + regcache_sync(fsl_dev->regmap); + + return 0; +} +#endif + +static const struct dev_pm_ops fsl_dcu_drm_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume) +}; + +static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = { + .name = "ls1021a", + .total_layer = 16, + .max_layer = 4, +}; + +static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = { + .name = "vf610", + .total_layer = 64, + .max_layer = 6, +}; + +static const struct of_device_id fsl_dcu_of_match[] = { + { + .compatible = "fsl,ls1021a-dcu", + .data = &fsl_dcu_ls1021a_data, + }, { + .compatible = "fsl,vf610-dcu", + .data = &fsl_dcu_vf610_data, + }, { + }, +}; +MODULE_DEVICE_TABLE(of, fsl_dcu_of_match); + +static int fsl_dcu_drm_probe(struct platform_device *pdev) +{ + struct fsl_dcu_drm_device *fsl_dev; + struct drm_device *drm; + struct device *dev = &pdev->dev; + struct resource *res; + void __iomem *base; + struct drm_driver *driver = &fsl_dcu_drm_driver; + const struct of_device_id *id; + int ret; + + fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL); + if (!fsl_dev) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "could not get memory IO resource\n"); + return -ENODEV; + } + + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) { + ret = PTR_ERR(base); + return ret; + } + + fsl_dev->irq = platform_get_irq(pdev, 0); + if (fsl_dev->irq < 0) { + dev_err(dev, "failed to get irq\n"); + return -ENXIO; + } + + fsl_dev->clk = devm_clk_get(dev, "dcu"); + if (IS_ERR(fsl_dev->clk)) { + ret = PTR_ERR(fsl_dev->clk); + dev_err(dev, "failed to get dcu clock\n"); + return ret; + } + ret = clk_prepare(fsl_dev->clk); + if (ret < 0) { + dev_err(dev, "failed to prepare dcu clk\n"); + return ret; + } + ret = clk_enable(fsl_dev->clk); + if (ret < 0) { + dev_err(dev, "failed to enable dcu clk\n"); + clk_unprepare(fsl_dev->clk); + return ret; + } + + fsl_dev->regmap = devm_regmap_init_mmio(dev, base, + &fsl_dcu_regmap_config); + if (IS_ERR(fsl_dev->regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(fsl_dev->regmap); + } + + id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node); + if (!id) + return -ENODEV; + fsl_dev->soc = id->data; + + drm = drm_dev_alloc(driver, dev); + if (!drm) + return -ENOMEM; + + fsl_dev->dev = dev; + fsl_dev->drm = drm; + fsl_dev->np = dev->of_node; + drm->dev_private = fsl_dev; + dev_set_drvdata(dev, fsl_dev); + drm_dev_set_unique(drm, dev_name(dev)); + + ret = drm_dev_register(drm, 0); + if (ret < 0) + goto unref; + + DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name, + driver->major, driver->minor, driver->patchlevel, + driver->date, drm->primary->index); + + return 0; + +unref: + drm_dev_unref(drm); + return ret; +} + +static int fsl_dcu_drm_remove(struct platform_device *pdev) +{ + struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev); + + drm_put_dev(fsl_dev->drm); + + return 0; +} + +static struct platform_driver fsl_dcu_drm_platform_driver = { + .probe = fsl_dcu_drm_probe, + .remove = fsl_dcu_drm_remove, + .driver = { + .name = "fsl-dcu", + .pm = &fsl_dcu_drm_pm_ops, + .of_match_table = fsl_dcu_of_match, + }, +}; + +module_platform_driver(fsl_dcu_drm_platform_driver); + +MODULE_DESCRIPTION("Freescale DCU DRM Driver"); +MODULE_LICENSE("GPL"); |