On Thu, 2020-07-23 at 16:56 +0200, Philipp Zabel wrote:
> Add a drm_encoder_init() variant that allocates an encoder with
> drmm_kzalloc() and registers drm_encoder_cleanup() with
> drmm_add_action_or_reset().
>
> Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
> ---
> New in v2
> ---
> drivers/gpu/drm/drm_encoder.c | 101 ++++++++++++++++++++++++++--------
> include/drm/drm_encoder.h | 30 ++++++++++
> 2 files changed, 108 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
> index e555281f43d4..91184f67333c 100644
> --- a/drivers/gpu/drm/drm_encoder.c
> +++ b/drivers/gpu/drm/drm_encoder.c
> @@ -26,6 +26,7 @@
> #include <drm/drm_device.h>
> #include <drm/drm_drv.h>
> #include <drm/drm_encoder.h>
> +#include <drm/drm_managed.h>
>
> #include "drm_crtc_internal.h"
>
> @@ -91,25 +92,10 @@ void drm_encoder_unregister_all(struct drm_device *dev)
> }
> }
>
> -/**
> - * drm_encoder_init - Init a preallocated encoder
> - * @dev: drm device
> - * @encoder: the encoder to init
> - * @funcs: callbacks for this encoder
> - * @encoder_type: user visible type of the encoder
> - * @name: printf style format string for the encoder name, or NULL for
> default name
> - *
> - * Initialises a preallocated encoder. Encoder should be subclassed as part
> of
> - * driver encoder objects. At driver unload time drm_encoder_cleanup()
> should be
> - * called from the driver's &drm_encoder_funcs.destroy hook.
> - *
> - * Returns:
> - * Zero on success, error code on failure.
> - */
> -int drm_encoder_init(struct drm_device *dev,
> - struct drm_encoder *encoder,
> - const struct drm_encoder_funcs *funcs,
> - int encoder_type, const char *name, ...)
> +static int __drm_encoder_init(struct drm_device *dev,
> + struct drm_encoder *encoder,
> + const struct drm_encoder_funcs *funcs,
> + int encoder_type, const char *name, va_list ap)
> {
> int ret;
>
> @@ -125,11 +111,7 @@ int drm_encoder_init(struct drm_device *dev,
> encoder->encoder_type = encoder_type;
> encoder->funcs = funcs;
> if (name) {
> - va_list ap;
> -
> - va_start(ap, name);
> encoder->name = kvasprintf(GFP_KERNEL, name, ap);
> - va_end(ap);
> } else {
> encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
>
> drm_encoder_enum_list[encoder_type].name,
> @@ -150,6 +132,38 @@ int drm_encoder_init(struct drm_device *dev,
>
> return ret;
> }
> +
> +/**
> + * drm_encoder_init - Init a preallocated encoder
> + * @dev: drm device
> + * @encoder: the encoder to init
> + * @funcs: callbacks for this encoder
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL for
> default name
> + *
> + * Initialises a preallocated encoder. Encoder should be subclassed as part
> of
> + * driver encoder objects. At driver unload time drm_encoder_cleanup()
> should be
> + * called from the driver's &drm_encoder_funcs.destroy hook.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_encoder_init(struct drm_device *dev,
> + struct drm_encoder *encoder,
> + const struct drm_encoder_funcs *funcs,
> + int encoder_type, const char *name, ...)
> +{
> + va_list ap;
> + int ret;
> +
> + if (name)
> + va_start(ap, name);
> + ret = __drm_encoder_init(dev, encoder, funcs, encoder_type, name, ap);
> + if (name)
> + va_end(ap);
> +
> + return ret;
> +}
> EXPORT_SYMBOL(drm_encoder_init);
>
> /**
> @@ -181,6 +195,47 @@ void drm_encoder_cleanup(struct drm_encoder *encoder)
> }
> EXPORT_SYMBOL(drm_encoder_cleanup);
>
> +void drmm_encoder_init_release(struct drm_device *dev, void *ptr)
> +{
> + struct drm_encoder *encoder = ptr;
I'll add
if (WARN_ON(!encoder->dev))
return;
here.
> + drm_encoder_cleanup(encoder);
> +}
> +
> +void *__drmm_encoder_init(struct drm_device *dev, size_t size, size_t offset,
> + const struct drm_encoder_funcs *funcs,
> + int encoder_type, const char *name, ...)
> +{
> + void *container;
> + struct drm_encoder *encoder;
> + va_list ap;
> + int ret;
> +
> + if (WARN_ON(!funcs || funcs->destroy))
> + return ERR_PTR(-EINVAL);
> +
> + container = drmm_kzalloc(dev, size, GFP_KERNEL);
> + if (!container)
> + return ERR_PTR(-EINVAL);
> +
> + encoder = container + offset;
> +
> + if (name)
> + va_start(ap, name);
> + ret = __drm_encoder_init(dev, encoder, funcs, encoder_type, name, ap);
> + if (name)
> + va_end(ap);
> + if (ret)
> + return ERR_PTR(ret);
> +
> + ret = drmm_add_action_or_reset(dev, drmm_encoder_init_release, encoder);
> + if (ret)
> + return ERR_PTR(ret);
> +
> + return container;
> +}
> +EXPORT_SYMBOL(__drmm_encoder_init);
> +
> static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
> {
> struct drm_connector *connector;
> diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h
> index a60f5f1555ac..54b82554ee88 100644
> --- a/include/drm/drm_encoder.h
> +++ b/include/drm/drm_encoder.h
> @@ -195,6 +195,36 @@ int drm_encoder_init(struct drm_device *dev,
> const struct drm_encoder_funcs *funcs,
> int encoder_type, const char *name, ...);
>
> +__printf(6, 7)
> +void *__drmm_encoder_init(struct drm_device *dev,
> + size_t size, size_t offset,
> + const struct drm_encoder_funcs *funcs,
> + int encoder_type,
> + const char *name, ...);
> +
> +/**
> + * drmm_encoder_init - Allocate and initialize an encoder
> + * @dev: drm device
> + * @type: the type of the struct which contains struct &drm_encoder
> + * @member: the name of the &drm_encoder within @type.
> + * @funcs: callbacks for this encoder
> + * @encoder_type: user visible type of the encoder
> + * @name: printf style format string for the encoder name, or NULL for
> default name
> + *
> + * Allocates and initializes an encoder. Encoder should be subclassed as
> part of
> + * driver encoder objects. Cleanup is automatically handled through
> registering
> + * drm_encoder_cleanup() with drmm_add_action().
> + *
> + * The @drm_encoder_funcs.destroy hook must be NULL.
> + *
> + * Returns:
> + * Pointer to new encoder, or ERR_PTR on failure.
> + */
> +#define drmm_encoder_init(dev, type, member, funcs, encoder_type, name, ...)
> \
> + ((type *) __drmm_encoder_init(dev, sizeof(type), \
> + offsetof(type, member), funcs, \
> + encoder_type, name, ##__VA_ARGS__))
> +
Should this be called drmm_encoder_alloc instead?
regards
Philipp
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