Hi,
On 12/20/21 23:28, Rajat Jain wrote:
> Allow a privacy screen provider to stash its private data pointer in the
> drm_privacy_screen, and update the drm_privacy_screen_register() call to
> accept that. Also introduce a *_get_drvdata() so that it can retrieved
> back when needed.
>
> This also touches the IBM Thinkpad platform driver, the only user of
> privacy screen today, to pass NULL for now to the updated API.
>
> Signed-off-by: Rajat Jain <rajatja@xxxxxxxxxx>
Thanks, patch looks good to me:
Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Regards,
Hans
> ---
> v3: Initial version. Came up due to review comments on v2 of other patches.
> v2: No v2
> v1: No v1
>
> drivers/gpu/drm/drm_privacy_screen.c | 5 ++++-
> drivers/platform/x86/thinkpad_acpi.c | 2 +-
> include/drm/drm_privacy_screen_driver.h | 13 ++++++++++++-
> 3 files changed, 17 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_privacy_screen.c b/drivers/gpu/drm/drm_privacy_screen.c
> index beaf99e9120a..03b149cc455b 100644
> --- a/drivers/gpu/drm/drm_privacy_screen.c
> +++ b/drivers/gpu/drm/drm_privacy_screen.c
> @@ -387,7 +387,8 @@ static void drm_privacy_screen_device_release(struct device *dev)
> * * An ERR_PTR(errno) on failure.
> */
> struct drm_privacy_screen *drm_privacy_screen_register(
> - struct device *parent, const struct drm_privacy_screen_ops *ops)
> + struct device *parent, const struct drm_privacy_screen_ops *ops,
> + void *data)
> {
> struct drm_privacy_screen *priv;
> int ret;
> @@ -404,6 +405,7 @@ struct drm_privacy_screen *drm_privacy_screen_register(
> priv->dev.parent = parent;
> priv->dev.release = drm_privacy_screen_device_release;
> dev_set_name(&priv->dev, "privacy_screen-%s", dev_name(parent));
> + priv->drvdata = data;
> priv->ops = ops;
>
> priv->ops->get_hw_state(priv);
> @@ -439,6 +441,7 @@ void drm_privacy_screen_unregister(struct drm_privacy_screen *priv)
> mutex_unlock(&drm_privacy_screen_devs_lock);
>
> mutex_lock(&priv->lock);
> + priv->drvdata = NULL;
> priv->ops = NULL;
> mutex_unlock(&priv->lock);
>
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 341655d711ce..ccbfda2b0095 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -9782,7 +9782,7 @@ static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
> return 0;
>
> lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev,
> - &lcdshadow_ops);
> + &lcdshadow_ops, NULL);
> if (IS_ERR(lcdshadow_dev))
> return PTR_ERR(lcdshadow_dev);
>
> diff --git a/include/drm/drm_privacy_screen_driver.h b/include/drm/drm_privacy_screen_driver.h
> index 24591b607675..4ef246d5706f 100644
> --- a/include/drm/drm_privacy_screen_driver.h
> +++ b/include/drm/drm_privacy_screen_driver.h
> @@ -73,10 +73,21 @@ struct drm_privacy_screen {
> * for more info.
> */
> enum drm_privacy_screen_status hw_state;
> + /**
> + * @drvdata: Private data owned by the privacy screen provider
> + */
> + void *drvdata;
> };
>
> +static inline
> +void *drm_privacy_screen_get_drvdata(struct drm_privacy_screen *priv)
> +{
> + return priv->drvdata;
> +}
> +
> struct drm_privacy_screen *drm_privacy_screen_register(
> - struct device *parent, const struct drm_privacy_screen_ops *ops);
> + struct device *parent, const struct drm_privacy_screen_ops *ops,
> + void *data);
> void drm_privacy_screen_unregister(struct drm_privacy_screen *priv);
>
> void drm_privacy_screen_call_notifier_chain(struct drm_privacy_screen *priv);
>
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