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linux/drivers/gpu/drm/tegra/gr3d.c
Christophe Jaillet 87ba3e15fb drm/tegra: Fix error handling 
It is likely that checking 'gr3d->clk_secondary' instead of 'gr3d->clk'
is expected here.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2016-11-07 13:01:42 +01:00

359 lines
8.7 KiB
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/*
* Copyright (C) 2013 Avionic Design GmbH
* Copyright (C) 2013 NVIDIA Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/host1x.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <soc/tegra/pmc.h>
#include "drm.h"
#include "gem.h"
#include "gr3d.h"
struct gr3d {
struct tegra_drm_client client;
struct host1x_channel *channel;
struct clk *clk_secondary;
struct clk *clk;
struct reset_control *rst_secondary;
struct reset_control *rst;
DECLARE_BITMAP(addr_regs, GR3D_NUM_REGS);
};
static inline struct gr3d *to_gr3d(struct tegra_drm_client *client)
{
return container_of(client, struct gr3d, client);
}
static int gr3d_init(struct host1x_client *client)
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct drm_device *dev = dev_get_drvdata(client->parent);
unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
struct gr3d *gr3d = to_gr3d(drm);
gr3d->channel = host1x_channel_request(client->dev);
if (!gr3d->channel)
return -ENOMEM;
client->syncpts[0] = host1x_syncpt_request(client->dev, flags);
if (!client->syncpts[0]) {
host1x_channel_free(gr3d->channel);
return -ENOMEM;
}
return tegra_drm_register_client(dev->dev_private, drm);
}
static int gr3d_exit(struct host1x_client *client)
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct drm_device *dev = dev_get_drvdata(client->parent);
struct gr3d *gr3d = to_gr3d(drm);
int err;
err = tegra_drm_unregister_client(dev->dev_private, drm);
if (err < 0)
return err;
host1x_syncpt_free(client->syncpts[0]);
host1x_channel_free(gr3d->channel);
return 0;
}
static const struct host1x_client_ops gr3d_client_ops = {
.init = gr3d_init,
.exit = gr3d_exit,
};
static int gr3d_open_channel(struct tegra_drm_client *client,
struct tegra_drm_context *context)
{
struct gr3d *gr3d = to_gr3d(client);
context->channel = host1x_channel_get(gr3d->channel);
if (!context->channel)
return -ENOMEM;
return 0;
}
static void gr3d_close_channel(struct tegra_drm_context *context)
{
host1x_channel_put(context->channel);
}
static int gr3d_is_addr_reg(struct device *dev, u32 class, u32 offset)
{
struct gr3d *gr3d = dev_get_drvdata(dev);
switch (class) {
case HOST1X_CLASS_HOST1X:
if (offset == 0x2b)
return 1;
break;
case HOST1X_CLASS_GR3D:
if (offset >= GR3D_NUM_REGS)
break;
if (test_bit(offset, gr3d->addr_regs))
return 1;
break;
}
return 0;
}
static const struct tegra_drm_client_ops gr3d_ops = {
.open_channel = gr3d_open_channel,
.close_channel = gr3d_close_channel,
.is_addr_reg = gr3d_is_addr_reg,
.submit = tegra_drm_submit,
};
static const struct of_device_id tegra_gr3d_match[] = {
{ .compatible = "nvidia,tegra114-gr3d" },
{ .compatible = "nvidia,tegra30-gr3d" },
{ .compatible = "nvidia,tegra20-gr3d" },
{ }
};
MODULE_DEVICE_TABLE(of, tegra_gr3d_match);
static const u32 gr3d_addr_regs[] = {
GR3D_IDX_ATTRIBUTE( 0),
GR3D_IDX_ATTRIBUTE( 1),
GR3D_IDX_ATTRIBUTE( 2),
GR3D_IDX_ATTRIBUTE( 3),
GR3D_IDX_ATTRIBUTE( 4),
GR3D_IDX_ATTRIBUTE( 5),
GR3D_IDX_ATTRIBUTE( 6),
GR3D_IDX_ATTRIBUTE( 7),
GR3D_IDX_ATTRIBUTE( 8),
GR3D_IDX_ATTRIBUTE( 9),
GR3D_IDX_ATTRIBUTE(10),
GR3D_IDX_ATTRIBUTE(11),
GR3D_IDX_ATTRIBUTE(12),
GR3D_IDX_ATTRIBUTE(13),
GR3D_IDX_ATTRIBUTE(14),
GR3D_IDX_ATTRIBUTE(15),
GR3D_IDX_INDEX_BASE,
GR3D_QR_ZTAG_ADDR,
GR3D_QR_CTAG_ADDR,
GR3D_QR_CZ_ADDR,
GR3D_TEX_TEX_ADDR( 0),
GR3D_TEX_TEX_ADDR( 1),
GR3D_TEX_TEX_ADDR( 2),
GR3D_TEX_TEX_ADDR( 3),
GR3D_TEX_TEX_ADDR( 4),
GR3D_TEX_TEX_ADDR( 5),
GR3D_TEX_TEX_ADDR( 6),
GR3D_TEX_TEX_ADDR( 7),
GR3D_TEX_TEX_ADDR( 8),
GR3D_TEX_TEX_ADDR( 9),
GR3D_TEX_TEX_ADDR(10),
GR3D_TEX_TEX_ADDR(11),
GR3D_TEX_TEX_ADDR(12),
GR3D_TEX_TEX_ADDR(13),
GR3D_TEX_TEX_ADDR(14),
GR3D_TEX_TEX_ADDR(15),
GR3D_DW_MEMORY_OUTPUT_ADDRESS,
GR3D_GLOBAL_SURFADDR( 0),
GR3D_GLOBAL_SURFADDR( 1),
GR3D_GLOBAL_SURFADDR( 2),
GR3D_GLOBAL_SURFADDR( 3),
GR3D_GLOBAL_SURFADDR( 4),
GR3D_GLOBAL_SURFADDR( 5),
GR3D_GLOBAL_SURFADDR( 6),
GR3D_GLOBAL_SURFADDR( 7),
GR3D_GLOBAL_SURFADDR( 8),
GR3D_GLOBAL_SURFADDR( 9),
GR3D_GLOBAL_SURFADDR(10),
GR3D_GLOBAL_SURFADDR(11),
GR3D_GLOBAL_SURFADDR(12),
GR3D_GLOBAL_SURFADDR(13),
GR3D_GLOBAL_SURFADDR(14),
GR3D_GLOBAL_SURFADDR(15),
GR3D_GLOBAL_SPILLSURFADDR,
GR3D_GLOBAL_SURFOVERADDR( 0),
GR3D_GLOBAL_SURFOVERADDR( 1),
GR3D_GLOBAL_SURFOVERADDR( 2),
GR3D_GLOBAL_SURFOVERADDR( 3),
GR3D_GLOBAL_SURFOVERADDR( 4),
GR3D_GLOBAL_SURFOVERADDR( 5),
GR3D_GLOBAL_SURFOVERADDR( 6),
GR3D_GLOBAL_SURFOVERADDR( 7),
GR3D_GLOBAL_SURFOVERADDR( 8),
GR3D_GLOBAL_SURFOVERADDR( 9),
GR3D_GLOBAL_SURFOVERADDR(10),
GR3D_GLOBAL_SURFOVERADDR(11),
GR3D_GLOBAL_SURFOVERADDR(12),
GR3D_GLOBAL_SURFOVERADDR(13),
GR3D_GLOBAL_SURFOVERADDR(14),
GR3D_GLOBAL_SURFOVERADDR(15),
GR3D_GLOBAL_SAMP01SURFADDR( 0),
GR3D_GLOBAL_SAMP01SURFADDR( 1),
GR3D_GLOBAL_SAMP01SURFADDR( 2),
GR3D_GLOBAL_SAMP01SURFADDR( 3),
GR3D_GLOBAL_SAMP01SURFADDR( 4),
GR3D_GLOBAL_SAMP01SURFADDR( 5),
GR3D_GLOBAL_SAMP01SURFADDR( 6),
GR3D_GLOBAL_SAMP01SURFADDR( 7),
GR3D_GLOBAL_SAMP01SURFADDR( 8),
GR3D_GLOBAL_SAMP01SURFADDR( 9),
GR3D_GLOBAL_SAMP01SURFADDR(10),
GR3D_GLOBAL_SAMP01SURFADDR(11),
GR3D_GLOBAL_SAMP01SURFADDR(12),
GR3D_GLOBAL_SAMP01SURFADDR(13),
GR3D_GLOBAL_SAMP01SURFADDR(14),
GR3D_GLOBAL_SAMP01SURFADDR(15),
GR3D_GLOBAL_SAMP23SURFADDR( 0),
GR3D_GLOBAL_SAMP23SURFADDR( 1),
GR3D_GLOBAL_SAMP23SURFADDR( 2),
GR3D_GLOBAL_SAMP23SURFADDR( 3),
GR3D_GLOBAL_SAMP23SURFADDR( 4),
GR3D_GLOBAL_SAMP23SURFADDR( 5),
GR3D_GLOBAL_SAMP23SURFADDR( 6),
GR3D_GLOBAL_SAMP23SURFADDR( 7),
GR3D_GLOBAL_SAMP23SURFADDR( 8),
GR3D_GLOBAL_SAMP23SURFADDR( 9),
GR3D_GLOBAL_SAMP23SURFADDR(10),
GR3D_GLOBAL_SAMP23SURFADDR(11),
GR3D_GLOBAL_SAMP23SURFADDR(12),
GR3D_GLOBAL_SAMP23SURFADDR(13),
GR3D_GLOBAL_SAMP23SURFADDR(14),
GR3D_GLOBAL_SAMP23SURFADDR(15),
};
static int gr3d_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct host1x_syncpt **syncpts;
struct gr3d *gr3d;
unsigned int i;
int err;
gr3d = devm_kzalloc(&pdev->dev, sizeof(*gr3d), GFP_KERNEL);
if (!gr3d)
return -ENOMEM;
syncpts = devm_kzalloc(&pdev->dev, sizeof(*syncpts), GFP_KERNEL);
if (!syncpts)
return -ENOMEM;
gr3d->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(gr3d->clk)) {
dev_err(&pdev->dev, "cannot get clock\n");
return PTR_ERR(gr3d->clk);
}
gr3d->rst = devm_reset_control_get(&pdev->dev, "3d");
if (IS_ERR(gr3d->rst)) {
dev_err(&pdev->dev, "cannot get reset\n");
return PTR_ERR(gr3d->rst);
}
if (of_device_is_compatible(np, "nvidia,tegra30-gr3d")) {
gr3d->clk_secondary = devm_clk_get(&pdev->dev, "3d2");
if (IS_ERR(gr3d->clk_secondary)) {
dev_err(&pdev->dev, "cannot get secondary clock\n");
return PTR_ERR(gr3d->clk_secondary);
}
gr3d->rst_secondary = devm_reset_control_get(&pdev->dev,
"3d2");
if (IS_ERR(gr3d->rst_secondary)) {
dev_err(&pdev->dev, "cannot get secondary reset\n");
return PTR_ERR(gr3d->rst_secondary);
}
}
err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_3D, gr3d->clk,
gr3d->rst);
if (err < 0) {
dev_err(&pdev->dev, "failed to power up 3D unit\n");
return err;
}
if (gr3d->clk_secondary) {
err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_3D1,
gr3d->clk_secondary,
gr3d->rst_secondary);
if (err < 0) {
dev_err(&pdev->dev,
"failed to power up secondary 3D unit\n");
return err;
}
}
INIT_LIST_HEAD(&gr3d->client.base.list);
gr3d->client.base.ops = &gr3d_client_ops;
gr3d->client.base.dev = &pdev->dev;
gr3d->client.base.class = HOST1X_CLASS_GR3D;
gr3d->client.base.syncpts = syncpts;
gr3d->client.base.num_syncpts = 1;
INIT_LIST_HEAD(&gr3d->client.list);
gr3d->client.ops = &gr3d_ops;
err = host1x_client_register(&gr3d->client.base);
if (err < 0) {
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
err);
return err;
}
/* initialize address register map */
for (i = 0; i < ARRAY_SIZE(gr3d_addr_regs); i++)
set_bit(gr3d_addr_regs[i], gr3d->addr_regs);
platform_set_drvdata(pdev, gr3d);
return 0;
}
static int gr3d_remove(struct platform_device *pdev)
{
struct gr3d *gr3d = platform_get_drvdata(pdev);
int err;
err = host1x_client_unregister(&gr3d->client.base);
if (err < 0) {
dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
err);
return err;
}
if (gr3d->clk_secondary) {
tegra_powergate_power_off(TEGRA_POWERGATE_3D1);
clk_disable_unprepare(gr3d->clk_secondary);
}
tegra_powergate_power_off(TEGRA_POWERGATE_3D);
clk_disable_unprepare(gr3d->clk);
return 0;
}
struct platform_driver tegra_gr3d_driver = {
.driver = {
.name = "tegra-gr3d",
.of_match_table = tegra_gr3d_match,
},
.probe = gr3d_probe,
.remove = gr3d_remove,
};
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