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drm/meson: Add support for components

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This patch adds support for optional components connected through the
Device Tree endpoints scheme.

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong 2017-04-04 14:15:23 +02:00
parent 8437d59ab3
commit a41e82e6c4
1 changed files with 99 additions and 14 deletions
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113
drivers/gpu/drm/meson/meson_drv.c
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@ -24,6 +24,7 @@
#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>
@ -150,9 +151,9 @@ static struct regmap_config meson_regmap_config = {
.max_register = 0x1000,
};
static int meson_drv_probe(struct platform_device *pdev)
static int meson_drv_bind(struct device *dev)
{
struct device *dev = &pdev->dev;
struct platform_device *pdev = to_platform_device(dev);
struct meson_drm *priv;
struct drm_device *drm;
struct resource *res;
@ -215,6 +216,15 @@ static int meson_drv_probe(struct platform_device *pdev)
drm_vblank_init(drm, 1);
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 */
@ -222,11 +232,11 @@ static int meson_drv_probe(struct platform_device *pdev)
if (ret)
goto free_drm;
/* Hardware Initialization */
meson_venc_init(priv);
meson_vpp_init(priv);
meson_viu_init(priv);
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)
@ -241,9 +251,6 @@ static int meson_drv_probe(struct platform_device *pdev)
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_connector);
@ -268,9 +275,9 @@ free_drm:
return ret;
}
static int meson_drv_remove(struct platform_device *pdev)
static void meson_drv_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(&pdev->dev);
struct drm_device *drm = dev_get_drvdata(dev);
struct meson_drm *priv = drm->dev_private;
drm_dev_unregister(drm);
@ -280,9 +287,88 @@ static int meson_drv_remove(struct platform_device *pdev)
drm_vblank_cleanup(drm);
drm_dev_unref(drm);
return 0;
}
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 %s with %s\n",
of_node_full_name(dev->of_node),
of_node_full_name(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 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" },
@ -293,7 +379,6 @@ MODULE_DEVICE_TABLE(of, dt_match);
static struct platform_driver meson_drm_platform_driver = {
.probe = meson_drv_probe,
.remove = meson_drv_remove,
.driver = {
.name = "meson-drm",
.of_match_table = dt_match,