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|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
* Copyright (C) 2014 Endless Mobile
*
* Written by:
* Jasper St. Pierre <jstpierre@mecheye.net>
*/
#include <linux/component.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/soc/amlogic/meson-canvas.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_irq.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "meson_crtc.h"
#include "meson_drv.h"
#include "meson_overlay.h"
#include "meson_plane.h"
#include "meson_registers.h"
#include "meson_venc_cvbs.h"
#include "meson_viu.h"
#include "meson_vpp.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 const struct drm_mode_config_funcs meson_mode_config_funcs = {
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
.fb_create = drm_gem_fb_create,
};
static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};
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 int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
/*
* We need 64bytes aligned stride, and PAGE aligned size
*/
args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
args->size = PAGE_ALIGN(args->pitch * args->height);
return drm_gem_cma_dumb_create_internal(file, dev, args);
}
DEFINE_DRM_GEM_CMA_FOPS(fops);
static struct drm_driver meson_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | 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_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 = meson_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 void meson_vpu_init(struct meson_drm *priv)
{
u32 value;
/*
* Slave dc0 and dc5 connected to master port 1.
* By default other slaves are connected to master port 0.
*/
value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1) |
VPU_RDARB_SLAVE_TO_MASTER_PORT(5, 1);
writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
/* Slave dc0 connected to master port 1 */
value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1);
writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
/* Slave dc4 and dc7 connected to master port 1 */
value = VPU_RDARB_SLAVE_TO_MASTER_PORT(4, 1) |
VPU_RDARB_SLAVE_TO_MASTER_PORT(7, 1);
writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
/* Slave dc1 connected to master port 1 */
value = VPU_RDARB_SLAVE_TO_MASTER_PORT(1, 1);
writel_relaxed(value, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
}
static void meson_remove_framebuffers(void)
{
struct apertures_struct *ap;
ap = alloc_apertures(1);
if (!ap)
return;
/* The framebuffer can be located anywhere in RAM */
ap->ranges[0].base = 0;
ap->ranges[0].size = ~0;
drm_fb_helper_remove_conflicting_framebuffers(ap, "meson-drm-fb",
false);
kfree(ap);
}
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;
priv->compat = (enum vpu_compatible)of_device_get_match_data(priv->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");
if (!res) {
ret = -EINVAL;
goto free_drm;
}
/* 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;
}
priv->canvas = meson_canvas_get(dev);
if (IS_ERR(priv->canvas)) {
ret = PTR_ERR(priv->canvas);
goto free_drm;
}
ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
if (ret)
goto free_drm;
ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
if (ret) {
meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
goto free_drm;
}
ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
if (ret) {
meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
goto free_drm;
}
ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
if (ret) {
meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
goto free_drm;
}
priv->vsync_irq = platform_get_irq(pdev, 0);
ret = drm_vblank_init(drm, 1);
if (ret)
goto free_drm;
/* Remove early framebuffers (ie. simplefb) */
meson_remove_framebuffers();
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;
drm->mode_config.helper_private = &meson_mode_config_helpers;
/* Hardware Initialization */
meson_vpu_init(priv);
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_overlay_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_kms_helper_poll_init(drm);
platform_set_drvdata(pdev, priv);
ret = drm_dev_register(drm, 0);
if (ret)
goto uninstall_irq;
drm_fbdev_generic_setup(drm, 32);
return 0;
uninstall_irq:
drm_irq_uninstall(drm);
free_drm:
drm_dev_put(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 meson_drm *priv = dev_get_drvdata(dev);
struct drm_device *drm = priv->drm;
if (priv->canvas) {
meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
}
drm_dev_unregister(drm);
drm_irq_uninstall(drm);
drm_kms_helper_poll_fini(drm);
drm_mode_config_cleanup(drm);
drm_dev_put(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)) {
of_node_put(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)) {
of_node_put(remote);
continue;
}
count += meson_probe_remote(pdev, &match, np, remote);
of_node_put(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",
.data = (void *)VPU_COMPATIBLE_GXBB },
{ .compatible = "amlogic,meson-gxl-vpu",
.data = (void *)VPU_COMPATIBLE_GXL },
{ .compatible = "amlogic,meson-gxm-vpu",
.data = (void *)VPU_COMPATIBLE_GXM },
{ .compatible = "amlogic,meson-g12a-vpu",
.data = (void *)VPU_COMPATIBLE_G12A },
{}
};
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");
|