On Tue, Dec 08, 2020 at 04:54:37PM +0100, Philipp Zabel wrote:
> Add an alternative to drm_crtc_init_with_planes() that allocates
> and initializes a crtc and registers drm_crtc_cleanup() with
> drmm_add_action_or_reset().
>
> Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Same bikesheds as with the others, imo important one is to point at the
new drmm_ version from the old kerneldoc. The others just make sure you
roll them out consistently (or not, if you don't like my suggestions).
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> ---
> drivers/gpu/drm/drm_crtc.c | 116 ++++++++++++++++++++++++++++---------
> include/drm/drm_crtc.h | 33 +++++++++++
> 2 files changed, 121 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index f927976eca50..668c31332230 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -38,6 +38,7 @@
> #include <drm/drm_crtc.h>
> #include <drm/drm_edid.h>
> #include <drm/drm_fourcc.h>
> +#include <drm/drm_managed.h>
> #include <drm/drm_modeset_lock.h>
> #include <drm/drm_atomic.h>
> #include <drm/drm_auth.h>
> @@ -240,30 +241,12 @@ struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
> *
> */
>
> -/**
> - * drm_crtc_init_with_planes - Initialise a new CRTC object with
> - * specified primary and cursor planes.
> - * @dev: DRM device
> - * @crtc: CRTC object to init
> - * @primary: Primary plane for CRTC
> - * @cursor: Cursor plane for CRTC
> - * @funcs: callbacks for the new CRTC
> - * @name: printf style format string for the CRTC name, or NULL for default name
> - *
> - * Inits a new object created as base part of a driver crtc object. Drivers
> - * should use this function instead of drm_crtc_init(), which is only provided
> - * for backwards compatibility with drivers which do not yet support universal
> - * planes). For really simple hardware which has only 1 plane look at
> - * drm_simple_display_pipe_init() instead.
> - *
> - * Returns:
> - * Zero on success, error code on failure.
> - */
> -int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
> - struct drm_plane *primary,
> - struct drm_plane *cursor,
> - const struct drm_crtc_funcs *funcs,
> - const char *name, ...)
> +__printf(6, 0)
> +static int __drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
> + struct drm_plane *primary,
> + struct drm_plane *cursor,
> + const struct drm_crtc_funcs *funcs,
> + const char *name, va_list ap)
> {
> struct drm_mode_config *config = &dev->mode_config;
> int ret;
> @@ -291,11 +274,7 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
> return ret;
>
> if (name) {
> - va_list ap;
> -
> - va_start(ap, name);
> crtc->name = kvasprintf(GFP_KERNEL, name, ap);
> - va_end(ap);
> } else {
> crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
> drm_num_crtcs(dev));
> @@ -339,8 +318,89 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
>
> return 0;
> }
> +
> +/**
> + * drm_crtc_init_with_planes - Initialise a new CRTC object with
> + * specified primary and cursor planes.
> + * @dev: DRM device
> + * @crtc: CRTC object to init
> + * @primary: Primary plane for CRTC
> + * @cursor: Cursor plane for CRTC
> + * @funcs: callbacks for the new CRTC
> + * @name: printf style format string for the CRTC name, or NULL for default name
> + *
> + * Inits a new object created as base part of a driver crtc object. Drivers
> + * should use this function instead of drm_crtc_init(), which is only provided
> + * for backwards compatibility with drivers which do not yet support universal
> + * planes). For really simple hardware which has only 1 plane look at
> + * drm_simple_display_pipe_init() instead.
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
> + struct drm_plane *primary,
> + struct drm_plane *cursor,
> + const struct drm_crtc_funcs *funcs,
> + const char *name, ...)
> +{
> + va_list ap;
> + int ret;
> +
> + va_start(ap, name);
> + ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
> + name, ap);
> + va_end(ap);
> +
> + return ret;
> +}
> EXPORT_SYMBOL(drm_crtc_init_with_planes);
>
> +static void drmm_crtc_alloc_with_planes_cleanup(struct drm_device *dev,
> + void *ptr)
> +{
> + struct drm_crtc *crtc = ptr;
> +
> + drm_crtc_cleanup(crtc);
> +}
> +
> +void *__drmm_crtc_alloc_with_planes(struct drm_device *dev,
> + size_t size, size_t offset,
> + struct drm_plane *primary,
> + struct drm_plane *cursor,
> + const struct drm_crtc_funcs *funcs,
> + const char *name, ...)
> +{
> + void *container;
> + struct drm_crtc *crtc;
> + va_list ap;
> + int ret;
> +
> + if (!funcs || funcs->destroy)
> + return ERR_PTR(-EINVAL);
> +
> + container = drmm_kzalloc(dev, size, GFP_KERNEL);
> + if (!container)
> + return ERR_PTR(-ENOMEM);
> +
> + crtc = container + offset;
> +
> + va_start(ap, name);
> + ret = __drm_crtc_init_with_planes(dev, crtc, primary, cursor, funcs,
> + name, ap);
> + va_end(ap);
> + if (ret)
> + return ERR_PTR(ret);
> +
> + ret = drmm_add_action_or_reset(dev, drmm_crtc_alloc_with_planes_cleanup,
> + crtc);
> + if (ret)
> + return ERR_PTR(ret);
> +
> + return container;
> +}
> +EXPORT_SYMBOL(__drmm_crtc_alloc_with_planes);
> +
> /**
> * drm_crtc_cleanup - Clean up the core crtc usage
> * @crtc: CRTC to cleanup
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index ba839e5e357d..9053f80b613f 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -1223,6 +1223,39 @@ int drm_crtc_init_with_planes(struct drm_device *dev,
> const char *name, ...);
> void drm_crtc_cleanup(struct drm_crtc *crtc);
>
> +__printf(7, 8)
> +void *__drmm_crtc_alloc_with_planes(struct drm_device *dev,
> + size_t size, size_t offset,
> + struct drm_plane *primary,
> + struct drm_plane *cursor,
> + const struct drm_crtc_funcs *funcs,
> + const char *name, ...);
> +
> +/**
> + * drm_crtc_alloc_with_planes - Allocate and initialize a new CRTC object with
> + * specified primary and cursor planes.
> + * @dev: DRM device
> + * @type: the type of the struct which contains struct &drm_crtc
> + * @member: the name of the &drm_crtc within @type.
> + * @primary: Primary plane for CRTC
> + * @cursor: Cursor plane for CRTC
> + * @funcs: callbacks for the new CRTC
> + * @name: printf style format string for the CRTC name, or NULL for default name
> + *
> + * Allocates and initializes a new crtc object. Cleanup is automatically
> + * handled through registering drmm_crtc_cleanup() with drmm_add_action().
> + *
> + * The @drm_crtc_funcs.destroy hook must be NULL.
> + *
> + * Returns:
> + * Pointer to new crtc, or ERR_PTR on failure.
> + */
> +#define drmm_crtc_alloc_with_planes(dev, type, member, primary, cursor, funcs, name, ...) \
> + ((type *)__drmm_crtc_alloc_with_planes(dev, sizeof(type), \
> + offsetof(type, member), \
> + primary, cursor, funcs, \
> + name, ##__VA_ARGS__))
> +
> /**
> * drm_crtc_index - find the index of a registered CRTC
> * @crtc: CRTC to find index for
> --
> 2.20.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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