diff options
Diffstat (limited to 'drivers/gpu/drm/meson/meson_drv.c')
| -rw-r--r-- | drivers/gpu/drm/meson/meson_drv.c | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c new file mode 100644 index 000000000000..ff1f6019b97b --- /dev/null +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -0,0 +1,343 @@ +/* + * Copyright (C) 2016 BayLibre, SAS + * Author: Neil Armstrong <narmstrong@baylibre.com> + * Copyright (C) 2014 Endless Mobile + * + * 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. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + * Written by: + * Jasper St. Pierre <jstpierre@mecheye.net> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/platform_device.h> +#include <linux/of_graph.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_flip_work.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_plane_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_rect.h> +#include <drm/drm_fb_helper.h> + +#include "meson_drv.h" +#include "meson_plane.h" +#include "meson_crtc.h" +#include "meson_venc_cvbs.h" + +#include "meson_vpp.h" +#include "meson_viu.h" +#include "meson_venc.h" +#include "meson_canvas.h" +#include "meson_registers.h" + +#define DRIVER_NAME "meson" +#define DRIVER_DESC "Amlogic Meson DRM driver" + +/* + * Video Processing Unit + * + * VPU Handles the Global Video Processing, it includes management of the + * clocks gates, blocks reset lines and power domains. + * + * What is missing : + * - Full reset of entire video processing HW blocks + * - Scaling and setup of the VPU clock + * - Bus clock gates + * - Powering up video processing HW blocks + * - Powering Up HDMI controller and PHY + */ + +static void meson_fb_output_poll_changed(struct drm_device *dev) +{ + struct meson_drm *priv = dev->dev_private; + + drm_fbdev_cma_hotplug_event(priv->fbdev); +} + +static const struct drm_mode_config_funcs meson_mode_config_funcs = { + .output_poll_changed = meson_fb_output_poll_changed, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, + .fb_create = drm_fb_cma_create, +}; + +static int meson_enable_vblank(struct drm_device *dev, unsigned int crtc) +{ + struct meson_drm *priv = dev->dev_private; + + meson_venc_enable_vsync(priv); + + return 0; +} + +static void meson_disable_vblank(struct drm_device *dev, unsigned int crtc) +{ + struct meson_drm *priv = dev->dev_private; + + meson_venc_disable_vsync(priv); +} + +static irqreturn_t meson_irq(int irq, void *arg) +{ + struct drm_device *dev = arg; + struct meson_drm *priv = dev->dev_private; + + (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG)); + + meson_crtc_irq(priv); + + return IRQ_HANDLED; +} + +static const struct file_operations 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 meson_driver = { + .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | + DRIVER_MODESET | DRIVER_PRIME | + DRIVER_ATOMIC, + + /* Vblank */ + .enable_vblank = meson_enable_vblank, + .disable_vblank = meson_disable_vblank, + .get_vblank_counter = drm_vblank_no_hw_counter, + + /* IRQ */ + .irq_handler = meson_irq, + + /* PRIME 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, + + /* GEM Ops */ + .dumb_create = drm_gem_cma_dumb_create, + .dumb_destroy = drm_gem_dumb_destroy, + .dumb_map_offset = drm_gem_cma_dumb_map_offset, + .gem_free_object_unlocked = drm_gem_cma_free_object, + .gem_vm_ops = &drm_gem_cma_vm_ops, + + /* Misc */ + .fops = &fops, + .name = DRIVER_NAME, + .desc = DRIVER_DESC, + .date = "20161109", + .major = 1, + .minor = 0, +}; + +static bool meson_vpu_has_available_connectors(struct device *dev) +{ + struct device_node *ep, *remote; + + /* Parses each endpoint and check if remote exists */ + for_each_endpoint_of_node(dev->of_node, ep) { + /* If the endpoint node exists, consider it enabled */ + remote = of_graph_get_remote_port(ep); + if (remote) + return true; + } + + return false; +} + +static struct regmap_config meson_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x1000, +}; + +static int meson_drv_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct meson_drm *priv; + struct drm_device *drm; + struct resource *res; + void __iomem *regs; + int ret; + + /* Checks if an output connector is available */ + if (!meson_vpu_has_available_connectors(dev)) { + dev_err(dev, "No output connector available\n"); + return -ENODEV; + } + + drm = drm_dev_alloc(&meson_driver, dev); + if (IS_ERR(drm)) + return PTR_ERR(drm); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) { + ret = -ENOMEM; + goto free_drm; + } + drm->dev_private = priv; + priv->drm = drm; + priv->dev = dev; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu"); + regs = devm_ioremap_resource(dev, res); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + priv->io_base = regs; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi"); + /* Simply ioremap since it may be a shared register zone */ + regs = devm_ioremap(dev, res->start, resource_size(res)); + if (!regs) + return -EADDRNOTAVAIL; + + priv->hhi = devm_regmap_init_mmio(dev, regs, + &meson_regmap_config); + if (IS_ERR(priv->hhi)) { + dev_err(&pdev->dev, "Couldn't create the HHI regmap\n"); + return PTR_ERR(priv->hhi); + } + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc"); + /* Simply ioremap since it may be a shared register zone */ + regs = devm_ioremap(dev, res->start, resource_size(res)); + if (!regs) + return -EADDRNOTAVAIL; + + priv->dmc = devm_regmap_init_mmio(dev, regs, + &meson_regmap_config); + if (IS_ERR(priv->dmc)) { + dev_err(&pdev->dev, "Couldn't create the DMC regmap\n"); + return PTR_ERR(priv->dmc); + } + + priv->vsync_irq = platform_get_irq(pdev, 0); + + drm_vblank_init(drm, 1); + drm_mode_config_init(drm); + + /* Encoder Initialization */ + + ret = meson_venc_cvbs_create(priv); + if (ret) + goto free_drm; + + /* Hardware Initialization */ + + meson_venc_init(priv); + meson_vpp_init(priv); + meson_viu_init(priv); + + ret = meson_plane_create(priv); + if (ret) + goto free_drm; + + ret = meson_crtc_create(priv); + if (ret) + goto free_drm; + + ret = drm_irq_install(drm, priv->vsync_irq); + if (ret) + goto free_drm; + + drm_mode_config_reset(drm); + drm->mode_config.max_width = 8192; + drm->mode_config.max_height = 8192; + drm->mode_config.funcs = &meson_mode_config_funcs; + + priv->fbdev = drm_fbdev_cma_init(drm, 32, + drm->mode_config.num_crtc, + drm->mode_config.num_connector); + if (IS_ERR(priv->fbdev)) { + ret = PTR_ERR(priv->fbdev); + goto free_drm; + } + + drm_kms_helper_poll_init(drm); + + platform_set_drvdata(pdev, priv); + + ret = drm_dev_register(drm, 0); + if (ret) + goto free_drm; + + return 0; + +free_drm: + drm_dev_unref(drm); + + return ret; +} + +static int meson_drv_remove(struct platform_device *pdev) +{ + struct drm_device *drm = dev_get_drvdata(&pdev->dev); + struct meson_drm *priv = drm->dev_private; + + drm_dev_unregister(drm); + drm_kms_helper_poll_fini(drm); + drm_fbdev_cma_fini(priv->fbdev); + drm_mode_config_cleanup(drm); + drm_vblank_cleanup(drm); + drm_dev_unref(drm); + + return 0; +} + +static const struct of_device_id dt_match[] = { + { .compatible = "amlogic,meson-gxbb-vpu" }, + { .compatible = "amlogic,meson-gxl-vpu" }, + { .compatible = "amlogic,meson-gxm-vpu" }, + {} +}; +MODULE_DEVICE_TABLE(of, dt_match); + +static struct platform_driver meson_drm_platform_driver = { + .probe = meson_drv_probe, + .remove = meson_drv_remove, + .driver = { + .owner = THIS_MODULE, + .name = DRIVER_NAME, + .of_match_table = dt_match, + }, +}; + +module_platform_driver(meson_drm_platform_driver); + +MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>"); +MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>"); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); |