blob: 4ad8223c60eaeb74697f23e3e412c317b6d96662 [file] [log] [blame]
/*
* 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/component.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"
/**
* DOC: 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 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;
}
DEFINE_DRM_GEM_CMA_FOPS(fops);
static struct drm_driver meson_driver = {
.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM |
DRIVER_MODESET | DRIVER_PRIME |
DRIVER_ATOMIC,
/* 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,
.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_bind_master(struct device *dev, bool has_components)
{
struct platform_device *pdev = to_platform_device(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)) {
ret = PTR_ERR(regs);
goto free_drm;
}
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) {
ret = -EADDRNOTAVAIL;
goto free_drm;
}
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");
ret = PTR_ERR(priv->hhi);
goto free_drm;
}
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) {
ret = -EADDRNOTAVAIL;
goto free_drm;
}
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");
ret = PTR_ERR(priv->dmc);
goto free_drm;
}
priv->vsync_irq = platform_get_irq(pdev, 0);
ret = drm_vblank_init(drm, 1);
if (ret)
goto free_drm;
drm_mode_config_init(drm);
drm->mode_config.max_width = 3840;
drm->mode_config.max_height = 2160;
drm->mode_config.funcs = &meson_mode_config_funcs;
/* Hardware Initialization */
meson_venc_init(priv);
meson_vpp_init(priv);
meson_viu_init(priv);
/* Encoder Initialization */
ret = meson_venc_cvbs_create(priv);
if (ret)
goto free_drm;
if (has_components) {
ret = component_bind_all(drm->dev, drm);
if (ret) {
dev_err(drm->dev, "Couldn't bind all components\n");
goto free_drm;
}
}
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);
priv->fbdev = drm_fbdev_cma_init(drm, 32,
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_bind(struct device *dev)
{
return meson_drv_bind_master(dev, true);
}
static void meson_drv_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(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_dev_unref(drm);
}
static const struct component_master_ops meson_drv_master_ops = {
.bind = meson_drv_bind,
.unbind = meson_drv_unbind,
};
static int compare_of(struct device *dev, void *data)
{
DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
dev->of_node, data);
return dev->of_node == data;
}
/* Possible connectors nodes to ignore */
static const struct of_device_id connectors_match[] = {
{ .compatible = "composite-video-connector" },
{ .compatible = "svideo-connector" },
{ .compatible = "hdmi-connector" },
{ .compatible = "dvi-connector" },
{}
};
static int meson_probe_remote(struct platform_device *pdev,
struct component_match **match,
struct device_node *parent,
struct device_node *remote)
{
struct device_node *ep, *remote_node;
int count = 1;
/* If node is a connector, return and do not add to match table */
if (of_match_node(connectors_match, remote))
return 1;
component_match_add(&pdev->dev, match, compare_of, remote);
for_each_endpoint_of_node(remote, ep) {
remote_node = of_graph_get_remote_port_parent(ep);
if (!remote_node ||
remote_node == parent || /* Ignore parent endpoint */
!of_device_is_available(remote_node))
continue;
count += meson_probe_remote(pdev, match, remote, remote_node);
of_node_put(remote_node);
}
return count;
}
static int meson_drv_probe(struct platform_device *pdev)
{
struct component_match *match = NULL;
struct device_node *np = pdev->dev.of_node;
struct device_node *ep, *remote;
int count = 0;
for_each_endpoint_of_node(np, ep) {
remote = of_graph_get_remote_port_parent(ep);
if (!remote || !of_device_is_available(remote))
continue;
count += meson_probe_remote(pdev, &match, np, remote);
}
if (count && !match)
return meson_drv_bind_master(&pdev->dev, false);
/* If some endpoints were found, initialize the nodes */
if (count) {
dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
return component_master_add_with_match(&pdev->dev,
&meson_drv_master_ops,
match);
}
/* If no output endpoints were available, simply bail out */
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,
.driver = {
.name = "meson-drm",
.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");