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419 lines
10 KiB
419 lines
10 KiB
/*
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* Copyright (C) 2016 BayLibre, SAS
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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* Copyright (C) 2014 Endless Mobile
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Written by:
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* Jasper St. Pierre <jstpierre@mecheye.net>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/platform_device.h>
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#include <linux/component.h>
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#include <linux/of_graph.h>
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#include <drm/drmP.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_flip_work.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_gem_cma_helper.h>
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#include <drm/drm_fb_cma_helper.h>
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#include <drm/drm_rect.h>
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#include <drm/drm_fb_helper.h>
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#include "meson_drv.h"
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#include "meson_plane.h"
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#include "meson_crtc.h"
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#include "meson_venc_cvbs.h"
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#include "meson_vpp.h"
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#include "meson_viu.h"
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#include "meson_venc.h"
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#include "meson_canvas.h"
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#include "meson_registers.h"
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#define DRIVER_NAME "meson"
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#define DRIVER_DESC "Amlogic Meson DRM driver"
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/**
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* DOC: Video Processing Unit
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*
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* VPU Handles the Global Video Processing, it includes management of the
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* clocks gates, blocks reset lines and power domains.
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*
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* What is missing :
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*
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* - Full reset of entire video processing HW blocks
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* - Scaling and setup of the VPU clock
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* - Bus clock gates
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* - Powering up video processing HW blocks
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* - Powering Up HDMI controller and PHY
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*/
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static void meson_fb_output_poll_changed(struct drm_device *dev)
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{
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struct meson_drm *priv = dev->dev_private;
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drm_fbdev_cma_hotplug_event(priv->fbdev);
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}
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static const struct drm_mode_config_funcs meson_mode_config_funcs = {
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.output_poll_changed = meson_fb_output_poll_changed,
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = drm_atomic_helper_commit,
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.fb_create = drm_fb_cma_create,
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};
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static irqreturn_t meson_irq(int irq, void *arg)
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{
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struct drm_device *dev = arg;
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struct meson_drm *priv = dev->dev_private;
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(void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
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meson_crtc_irq(priv);
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return IRQ_HANDLED;
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}
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DEFINE_DRM_GEM_CMA_FOPS(fops);
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static struct drm_driver meson_driver = {
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.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM |
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DRIVER_MODESET | DRIVER_PRIME |
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DRIVER_ATOMIC,
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/* IRQ */
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.irq_handler = meson_irq,
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/* PRIME Ops */
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_import = drm_gem_prime_import,
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.gem_prime_export = drm_gem_prime_export,
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.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
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.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
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.gem_prime_vmap = drm_gem_cma_prime_vmap,
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.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
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.gem_prime_mmap = drm_gem_cma_prime_mmap,
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/* GEM Ops */
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.dumb_create = drm_gem_cma_dumb_create,
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.gem_free_object_unlocked = drm_gem_cma_free_object,
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.gem_vm_ops = &drm_gem_cma_vm_ops,
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/* Misc */
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.fops = &fops,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = "20161109",
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.major = 1,
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.minor = 0,
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};
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static bool meson_vpu_has_available_connectors(struct device *dev)
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{
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struct device_node *ep, *remote;
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/* Parses each endpoint and check if remote exists */
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for_each_endpoint_of_node(dev->of_node, ep) {
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/* If the endpoint node exists, consider it enabled */
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remote = of_graph_get_remote_port(ep);
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if (remote)
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return true;
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}
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return false;
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}
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static struct regmap_config meson_regmap_config = {
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.reg_bits = 32,
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.val_bits = 32,
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.reg_stride = 4,
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.max_register = 0x1000,
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};
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static int meson_drv_bind_master(struct device *dev, bool has_components)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct meson_drm *priv;
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struct drm_device *drm;
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struct resource *res;
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void __iomem *regs;
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int ret;
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/* Checks if an output connector is available */
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if (!meson_vpu_has_available_connectors(dev)) {
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dev_err(dev, "No output connector available\n");
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return -ENODEV;
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}
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drm = drm_dev_alloc(&meson_driver, dev);
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if (IS_ERR(drm))
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return PTR_ERR(drm);
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv) {
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ret = -ENOMEM;
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goto free_drm;
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}
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drm->dev_private = priv;
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priv->drm = drm;
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priv->dev = dev;
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
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regs = devm_ioremap_resource(dev, res);
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if (IS_ERR(regs)) {
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ret = PTR_ERR(regs);
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goto free_drm;
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}
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priv->io_base = regs;
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
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/* Simply ioremap since it may be a shared register zone */
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regs = devm_ioremap(dev, res->start, resource_size(res));
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if (!regs) {
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ret = -EADDRNOTAVAIL;
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goto free_drm;
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}
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priv->hhi = devm_regmap_init_mmio(dev, regs,
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&meson_regmap_config);
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if (IS_ERR(priv->hhi)) {
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dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
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ret = PTR_ERR(priv->hhi);
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goto free_drm;
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}
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
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/* Simply ioremap since it may be a shared register zone */
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regs = devm_ioremap(dev, res->start, resource_size(res));
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if (!regs) {
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ret = -EADDRNOTAVAIL;
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goto free_drm;
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}
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priv->dmc = devm_regmap_init_mmio(dev, regs,
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&meson_regmap_config);
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if (IS_ERR(priv->dmc)) {
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dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
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ret = PTR_ERR(priv->dmc);
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goto free_drm;
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}
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priv->vsync_irq = platform_get_irq(pdev, 0);
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ret = drm_vblank_init(drm, 1);
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if (ret)
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goto free_drm;
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drm_mode_config_init(drm);
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drm->mode_config.max_width = 3840;
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drm->mode_config.max_height = 2160;
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drm->mode_config.funcs = &meson_mode_config_funcs;
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/* Hardware Initialization */
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meson_venc_init(priv);
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meson_vpp_init(priv);
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meson_viu_init(priv);
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/* Encoder Initialization */
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ret = meson_venc_cvbs_create(priv);
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if (ret)
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goto free_drm;
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if (has_components) {
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ret = component_bind_all(drm->dev, drm);
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if (ret) {
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dev_err(drm->dev, "Couldn't bind all components\n");
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goto free_drm;
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}
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}
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ret = meson_plane_create(priv);
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if (ret)
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goto free_drm;
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ret = meson_crtc_create(priv);
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if (ret)
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goto free_drm;
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ret = drm_irq_install(drm, priv->vsync_irq);
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if (ret)
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goto free_drm;
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drm_mode_config_reset(drm);
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priv->fbdev = drm_fbdev_cma_init(drm, 32,
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drm->mode_config.num_connector);
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if (IS_ERR(priv->fbdev)) {
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ret = PTR_ERR(priv->fbdev);
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goto free_drm;
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}
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drm_kms_helper_poll_init(drm);
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platform_set_drvdata(pdev, priv);
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ret = drm_dev_register(drm, 0);
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if (ret)
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goto uninstall_irq;
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return 0;
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uninstall_irq:
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drm_irq_uninstall(drm);
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free_drm:
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drm_dev_unref(drm);
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return ret;
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}
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static int meson_drv_bind(struct device *dev)
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{
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return meson_drv_bind_master(dev, true);
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}
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static void meson_drv_unbind(struct device *dev)
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{
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struct meson_drm *priv = dev_get_drvdata(dev);
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struct drm_device *drm = priv->drm;
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drm_dev_unregister(drm);
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drm_irq_uninstall(drm);
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drm_kms_helper_poll_fini(drm);
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drm_fbdev_cma_fini(priv->fbdev);
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drm_mode_config_cleanup(drm);
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drm_dev_unref(drm);
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}
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static const struct component_master_ops meson_drv_master_ops = {
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.bind = meson_drv_bind,
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.unbind = meson_drv_unbind,
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};
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static int compare_of(struct device *dev, void *data)
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{
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DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
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dev->of_node, data);
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return dev->of_node == data;
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}
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/* Possible connectors nodes to ignore */
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static const struct of_device_id connectors_match[] = {
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{ .compatible = "composite-video-connector" },
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{ .compatible = "svideo-connector" },
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{ .compatible = "hdmi-connector" },
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{ .compatible = "dvi-connector" },
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{}
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};
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static int meson_probe_remote(struct platform_device *pdev,
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struct component_match **match,
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struct device_node *parent,
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struct device_node *remote)
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{
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struct device_node *ep, *remote_node;
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int count = 1;
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/* If node is a connector, return and do not add to match table */
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if (of_match_node(connectors_match, remote))
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return 1;
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component_match_add(&pdev->dev, match, compare_of, remote);
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for_each_endpoint_of_node(remote, ep) {
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remote_node = of_graph_get_remote_port_parent(ep);
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if (!remote_node ||
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remote_node == parent || /* Ignore parent endpoint */
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!of_device_is_available(remote_node)) {
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of_node_put(remote_node);
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continue;
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}
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count += meson_probe_remote(pdev, match, remote, remote_node);
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of_node_put(remote_node);
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}
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return count;
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}
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static int meson_drv_probe(struct platform_device *pdev)
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{
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struct component_match *match = NULL;
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struct device_node *np = pdev->dev.of_node;
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struct device_node *ep, *remote;
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int count = 0;
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for_each_endpoint_of_node(np, ep) {
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remote = of_graph_get_remote_port_parent(ep);
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if (!remote || !of_device_is_available(remote)) {
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of_node_put(remote);
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continue;
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}
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count += meson_probe_remote(pdev, &match, np, remote);
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of_node_put(remote);
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}
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if (count && !match)
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return meson_drv_bind_master(&pdev->dev, false);
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/* If some endpoints were found, initialize the nodes */
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if (count) {
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dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
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return component_master_add_with_match(&pdev->dev,
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&meson_drv_master_ops,
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match);
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}
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/* If no output endpoints were available, simply bail out */
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return 0;
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};
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static const struct of_device_id dt_match[] = {
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{ .compatible = "amlogic,meson-gxbb-vpu" },
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{ .compatible = "amlogic,meson-gxl-vpu" },
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{ .compatible = "amlogic,meson-gxm-vpu" },
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{}
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};
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MODULE_DEVICE_TABLE(of, dt_match);
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static struct platform_driver meson_drm_platform_driver = {
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.probe = meson_drv_probe,
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.driver = {
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.name = "meson-drm",
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.of_match_table = dt_match,
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},
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};
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module_platform_driver(meson_drm_platform_driver);
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MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
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MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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