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drm/tegra: Fixes for v5.13-rc5

Browse source 
The most important change here fixes a race condition that causes either
 HDA or (more frequently) display to malfunction because they race for
 enabling the SOR power domain at probe time.
 
 Other than that, there's a couple of build warnings for issues
 introduced in v5.13 as well as some minor fixes, such as reference leak
 plugs.
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Merge tag 'drm/tegra/for-5.13-rc5' of ssh://git.freedesktop.org/git/tegra/linux into drm-fixes

drm/tegra: Fixes for v5.13-rc5

The most important change here fixes a race condition that causes either
HDA or (more frequently) display to malfunction because they race for
enabling the SOR power domain at probe time.

Other than that, there's a couple of build warnings for issues
introduced in v5.13 as well as some minor fixes, such as reference leak
plugs.

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thierry Reding <thierry.reding@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210603144624.788861-1-thierry.reding@gmail.com
This commit is contained in:
Dave Airlie 2021-06-04 10:23:23 +10:00
commit 37e2f2e800
5 changed files with 92 additions and 42 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/gpu/drm/tegra/drm.h
View file

@ -25,7 +25,7 @@
#include "trace.h"
/* XXX move to include/uapi/drm/drm_fourcc.h? */
#define DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT BIT(22)
#define DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT BIT_ULL(22)
struct reset_control;

2
drivers/gpu/drm/tegra/hub.c
View file

@ -510,7 +510,7 @@ static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
* dGPU sector layout.
*/
if (tegra_plane_state->tiling.sector_layout == TEGRA_BO_SECTOR_LAYOUT_GPU)
base |= BIT(39);
base |= BIT_ULL(39);
#endif
tegra_plane_writel(p, tegra_plane_state->format, DC_WIN_COLOR_DEPTH);

70
drivers/gpu/drm/tegra/sor.c
View file

@ -3125,21 +3125,21 @@ static int tegra_sor_init(struct host1x_client *client)
if (err < 0) {
dev_err(sor->dev, "failed to acquire SOR reset: %d\n",
err);
return err;
goto rpm_put;
}
err = reset_control_assert(sor->rst);
if (err < 0) {
dev_err(sor->dev, "failed to assert SOR reset: %d\n",
err);
return err;
goto rpm_put;
}
}
err = clk_prepare_enable(sor->clk);
if (err < 0) {
dev_err(sor->dev, "failed to enable clock: %d\n", err);
return err;
goto rpm_put;
}
usleep_range(1000, 3000);
@ -3150,7 +3150,7 @@ static int tegra_sor_init(struct host1x_client *client)
dev_err(sor->dev, "failed to deassert SOR reset: %d\n",
err);
clk_disable_unprepare(sor->clk);
return err;
goto rpm_put;
}
reset_control_release(sor->rst);
@ -3171,6 +3171,12 @@ static int tegra_sor_init(struct host1x_client *client)
}
return 0;
rpm_put:
if (sor->rst)
pm_runtime_put(sor->dev);
return err;
}
static int tegra_sor_exit(struct host1x_client *client)
@ -3739,12 +3745,8 @@ static int tegra_sor_probe(struct platform_device *pdev)
if (!sor->aux)
return -EPROBE_DEFER;
if (get_device(&sor->aux->ddc.dev)) {
if (try_module_get(sor->aux->ddc.owner))
sor->output.ddc = &sor->aux->ddc;
else
put_device(&sor->aux->ddc.dev);
}
if (get_device(sor->aux->dev))
sor->output.ddc = &sor->aux->ddc;
}
if (!sor->aux) {
@ -3772,12 +3774,13 @@ static int tegra_sor_probe(struct platform_device *pdev)
err = tegra_sor_parse_dt(sor);
if (err < 0)
return err;
goto put_aux;
err = tegra_output_probe(&sor->output);
if (err < 0)
return dev_err_probe(&pdev->dev, err,
"failed to probe output\n");
if (err < 0) {
dev_err_probe(&pdev->dev, err, "failed to probe output\n");
goto put_aux;
}
if (sor->ops && sor->ops->probe) {
err = sor->ops->probe(sor);
@ -3916,17 +3919,10 @@ static int tegra_sor_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, sor);
pm_runtime_enable(&pdev->dev);
INIT_LIST_HEAD(&sor->client.list);
host1x_client_init(&sor->client);
sor->client.ops = &sor_client_ops;
sor->client.dev = &pdev->dev;
err = host1x_client_register(&sor->client);
if (err < 0) {
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
err);
goto rpm_disable;
}
/*
* On Tegra210 and earlier, provide our own implementation for the
* pad output clock.
@ -3938,13 +3934,13 @@ static int tegra_sor_probe(struct platform_device *pdev)
sor->index);
if (!name) {
err = -ENOMEM;
goto unregister;
goto uninit;
}
err = host1x_client_resume(&sor->client);
if (err < 0) {
dev_err(sor->dev, "failed to resume: %d\n", err);
goto unregister;
goto uninit;
}
sor->clk_pad = tegra_clk_sor_pad_register(sor, name);
@ -3955,17 +3951,30 @@ static int tegra_sor_probe(struct platform_device *pdev)
err = PTR_ERR(sor->clk_pad);
dev_err(sor->dev, "failed to register SOR pad clock: %d\n",
err);
goto unregister;
goto uninit;
}
err = __host1x_client_register(&sor->client);
if (err < 0) {
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
err);
goto uninit;
}
return 0;
unregister:
host1x_client_unregister(&sor->client);
rpm_disable:
uninit:
host1x_client_exit(&sor->client);
pm_runtime_disable(&pdev->dev);
remove:
if (sor->aux)
sor->output.ddc = NULL;
tegra_output_remove(&sor->output);
put_aux:
if (sor->aux)
put_device(sor->aux->dev);
return err;
}
@ -3983,6 +3992,11 @@ static int tegra_sor_remove(struct platform_device *pdev)
pm_runtime_disable(&pdev->dev);
if (sor->aux) {
put_device(sor->aux->dev);
sor->output.ddc = NULL;
}
tegra_output_remove(&sor->output);
return 0;

30
drivers/gpu/host1x/bus.c
View file

@ -735,6 +735,29 @@ void host1x_driver_unregister(struct host1x_driver *driver)
}
EXPORT_SYMBOL(host1x_driver_unregister);
/**
* __host1x_client_init() - initialize a host1x client
* @client: host1x client
* @key: lock class key for the client-specific mutex
*/
void __host1x_client_init(struct host1x_client *client, struct lock_class_key *key)
{
INIT_LIST_HEAD(&client->list);
__mutex_init(&client->lock, "host1x client lock", key);
client->usecount = 0;
}
EXPORT_SYMBOL(__host1x_client_init);
/**
* host1x_client_exit() - uninitialize a host1x client
* @client: host1x client
*/
void host1x_client_exit(struct host1x_client *client)
{
mutex_destroy(&client->lock);
}
EXPORT_SYMBOL(host1x_client_exit);
/**
* __host1x_client_register() - register a host1x client
* @client: host1x client
@ -747,16 +770,11 @@ EXPORT_SYMBOL(host1x_driver_unregister);
* device and call host1x_device_init(), which will in turn call each client's
* &host1x_client_ops.init implementation.
*/
int __host1x_client_register(struct host1x_client *client,
struct lock_class_key *key)
int __host1x_client_register(struct host1x_client *client)
{
struct host1x *host1x;
int err;
INIT_LIST_HEAD(&client->list);
__mutex_init(&client->lock, "host1x client lock", key);
client->usecount = 0;
mutex_lock(&devices_lock);
list_for_each_entry(host1x, &devices, list) {

30
include/linux/host1x.h
View file

@ -332,12 +332,30 @@ static inline struct host1x_device *to_host1x_device(struct device *dev)
int host1x_device_init(struct host1x_device *device);
int host1x_device_exit(struct host1x_device *device);
int __host1x_client_register(struct host1x_client *client,
struct lock_class_key *key);
#define host1x_client_register(class) \
({ \
static struct lock_class_key __key; \
__host1x_client_register(class, &__key); \
void __host1x_client_init(struct host1x_client *client, struct lock_class_key *key);
void host1x_client_exit(struct host1x_client *client);
#define host1x_client_init(client) \
({ \
static struct lock_class_key __key; \
__host1x_client_init(client, &__key); \
})
int __host1x_client_register(struct host1x_client *client);
/*
* Note that this wrapper calls __host1x_client_init() for compatibility
* with existing callers. Callers that want to separately initialize and
* register a host1x client must first initialize using either of the
* __host1x_client_init() or host1x_client_init() functions and then use
* the low-level __host1x_client_register() function to avoid the client
* getting reinitialized.
*/
#define host1x_client_register(client) \
({ \
static struct lock_class_key __key; \
__host1x_client_init(client, &__key); \
__host1x_client_register(client); \
})
int host1x_client_unregister(struct host1x_client *client);