/*
* Copyright (C) 2015 Free Electrons
* Copyright (C) 2015 NextThing Co
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
*
* 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/component.h>
#include <linux/of_graph.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_of.h>
#include "sun4i_crtc.h"
#include "sun4i_drv.h"
#include "sun4i_framebuffer.h"
#include "sun4i_layer.h"
#include "sun4i_tcon.h"
static int sun4i_drv_enable_vblank(struct drm_device *drm, unsigned int pipe)
{
struct sun4i_drv *drv = drm->dev_private;
struct sun4i_tcon *tcon = drv->tcon;
DRM_DEBUG_DRIVER("Enabling VBLANK on pipe %d\n", pipe);
sun4i_tcon_enable_vblank(tcon, true);
return 0;
}
static void sun4i_drv_disable_vblank(struct drm_device *drm, unsigned int pipe)
{
struct sun4i_drv *drv = drm->dev_private;
struct sun4i_tcon *tcon = drv->tcon;
DRM_DEBUG_DRIVER("Disabling VBLANK on pipe %d\n", pipe);
sun4i_tcon_enable_vblank(tcon, false);
}
static const struct file_operations sun4i_drv_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.compat_ioctl = drm_compat_ioctl,
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.mmap = drm_gem_cma_mmap,
};
static struct drm_driver sun4i_drv_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
/* Generic Operations */
.fops = &sun4i_drv_fops,
.name = "sun4i-drm",
.desc = "Allwinner sun4i Display Engine",
.date = "20150629",
.major = 1,
.minor = 0,
/* GEM Operations */
.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,
/* PRIME Operations */
.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,
/* Frame Buffer Operations */
/* VBlank Operations */
.get_vblank_counter = drm_vblank_no_hw_counter,
.enable_vblank = sun4i_drv_enable_vblank,
.disable_vblank = sun4i_drv_disable_vblank,
};
static void sun4i_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, "sun4i-drm-fb", false);
kfree(ap);
}
static int sun4i_drv_bind(struct device *dev)
{
struct drm_device *drm;
struct sun4i_drv *drv;
int ret;
drm = drm_dev_alloc(&sun4i_drv_driver, dev);
if (IS_ERR(drm))
return PTR_ERR(drm);
drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
if (!drv) {
ret = -ENOMEM;
goto free_drm;
}
drm->dev_private = drv;
drm_vblank_init(drm, 1);
drm_mode_config_init(drm);
ret = component_bind_all(drm->dev, drm);
if (ret) {
dev_err(drm->dev, "Couldn't bind all pipelines components\n");
goto free_drm;
}
/* Create our layers */
drv->layers = sun4i_layers_init(drm);
if (IS_ERR(drv->layers)) {
dev_err(drm->dev, "Couldn't create the planes\n");
ret = PTR_ERR(drv->layers);
goto free_drm;
}
/* Create our CRTC */
drv->crtc = sun4i_crtc_init(drm);
if (!drv->crtc) {
dev_err(drm->dev, "Couldn't create the CRTC\n");
ret = -EINVAL;
goto free_drm;
}
drm->irq_enabled = true;
/* Remove early framebuffers (ie. simplefb) */
sun4i_remove_framebuffers();
/* Create our framebuffer */
drv->fbdev = sun4i_framebuffer_init(drm);
if (IS_ERR(drv->fbdev)) {
dev_err(drm->dev, "Couldn't create our framebuffer\n");
ret = PTR_ERR(drv->fbdev);
goto free_drm;
}
/* Enable connectors polling */
drm_kms_helper_poll_init(drm);
ret = drm_dev_register(drm, 0);
if (ret)
goto free_drm;
return 0;
free_drm:
drm_dev_unref(drm);
return ret;
}
static void sun4i_drv_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
drm_dev_unregister(drm);
drm_kms_helper_poll_fini(drm);
sun4i_framebuffer_free(drm);
drm_vblank_cleanup(drm);
drm_dev_unref(drm);
}
static const struct component_master_ops sun4i_drv_master_ops = {
.bind = sun4i_drv_bind,
.unbind = sun4i_drv_unbind,
};
static bool sun4i_drv_node_is_frontend(struct device_node *node)
{
return of_device_is_compatible(node, "allwinner,sun5i-a13-display-frontend") ||
of_device_is_compatible(node, "allwinner,sun6i-a31-display-frontend") ||
of_device_is_compatible(node, "allwinner,sun8i-a33-display-frontend");
}
static bool sun4i_drv_node_is_tcon(struct device_node *node)
{
return of_device_is_compatible(node, "allwinner,sun5i-a13-tcon") ||
of_device_is_compatible(node, "allwinner,sun6i-a31-tcon") ||
of_device_is_compatible(node, "allwinner,sun6i-a31s-tcon") ||
of_device_is_compatible(node, "allwinner,sun8i-a33-tcon");
}
static int compare_of(struct device *dev, void *data)
{
DRM_DEBUG_DRIVER("Comparing of node %s with %s\n",
of_node_full_name(dev->of_node),
of_node_full_name(data));
return dev->of_node == data;
}
static int sun4i_drv_add_endpoints(struct device *dev,
struct component_match **match,
struct device_node *node)
{
struct device_node *port, *ep, *remote;
int count = 0;
/*
* We don't support the frontend for now, so we will never
* have a device bound. Just skip over it, but we still want
* the rest our pipeline to be added.
*/
if (!sun4i_drv_node_is_frontend(node) &&
!of_device_is_available(node))
return 0;
if (!sun4i_drv_node_is_frontend(node)) {
/* Add current component */
DRM_DEBUG_DRIVER("Adding component %s\n",
of_node_full_name(node));
drm_of_component_match_add(dev, match, compare_of, node);
count++;
}
/* Inputs are listed first, then outputs */
port = of_graph_get_port_by_id(node, 1);
if (!port) {
DRM_DEBUG_DRIVER("No output to bind\n");
return count;
}
for_each_available_child_of_node(port, ep) {
remote = of_graph_get_remote_port_parent(ep);
if (!remote) {
DRM_DEBUG_DRIVER("Error retrieving the output node\n");
of_node_put(remote);
continue;
}
/*
* If the node is our TCON, the first port is used for
* panel or bridges, and will not be part of the
* component framework.
*/
if (sun4i_drv_node_is_tcon(node)) {
struct of_endpoint endpoint;
if (of_graph_parse_endpoint(ep, &endpoint)) {
DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
continue;
}
if (!endpoint.id) {
DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
continue;
}
}
/* Walk down our tree */
count += sun4i_drv_add_endpoints(dev, match, remote);
of_node_put(remote);
}
return count;
}
static int sun4i_drv_probe(struct platform_device *pdev)
{
struct component_match *match = NULL;
struct device_node *np = pdev->dev.of_node;
int i, count = 0;
for (i = 0;; i++) {
struct device_node *pipeline = of_parse_phandle(np,
"allwinner,pipelines",
i);
if (!pipeline)
break;
count += sun4i_drv_add_endpoints(&pdev->dev, &match,
pipeline);
of_node_put(pipeline);
DRM_DEBUG_DRIVER("Queued %d outputs on pipeline %d\n",
count, i);
}
if (count)
return component_master_add_with_match(&pdev->dev,
&sun4i_drv_master_ops,
match);
else
return 0;
}
static int sun4i_drv_remove(struct platform_device *pdev)
{
return 0;
}
static const struct of_device_id sun4i_drv_of_table[] = {
{ .compatible = "allwinner,sun5i-a13-display-engine" },
{ .compatible = "allwinner,sun6i-a31-display-engine" },
{ .compatible = "allwinner,sun6i-a31s-display-engine" },
{ .compatible = "allwinner,sun8i-a33-display-engine" },
{ }
};
MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
static struct platform_driver sun4i_drv_platform_driver = {
.probe = sun4i_drv_probe,
.remove = sun4i_drv_remove,
.driver = {
.name = "sun4i-drm",
.of_match_table = sun4i_drv_of_table,
},
};
module_platform_driver(sun4i_drv_platform_driver);
MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver");
MODULE_LICENSE("GPL");