[PATCH 2/4] drm/plane: Allocate planes with drm_universal_plane_alloc()
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Fri Sep 16 11:06:54 UTC 2022
Hi Thomas,
Thank you for the patch.
On Fri, Sep 09, 2022 at 12:59:45PM +0200, Thomas Zimmermann wrote:
> Provide drm_univeral_plane_alloc(), which allocated an initializes a
> plane. Code for non-atomic drivers uses this pattern. Convert it to
> the new function. The modeset helpers contain a quirk for handling their
> color formats differently. Set the flag outside plane allocation.
>
> The new function is already deprecated to some extend. Drivers should
> rather use drmm_univeral_plane_alloc() or drm_universal_plane_init().
If this is already deprecated and used by a single driver, what is the
point ?
> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
> ---
> drivers/gpu/drm/drm_modeset_helper.c | 61 +++++++++++--------------
> drivers/gpu/drm/drm_plane.c | 38 +++++++++++++++
> drivers/gpu/drm/nouveau/dispnv04/crtc.c | 41 ++++++-----------
> include/drm/drm_plane.h | 44 ++++++++++++++++++
> 4 files changed, 121 insertions(+), 63 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_modeset_helper.c b/drivers/gpu/drm/drm_modeset_helper.c
> index 611dd01fb604..38040eebfa16 100644
> --- a/drivers/gpu/drm/drm_modeset_helper.c
> +++ b/drivers/gpu/drm/drm_modeset_helper.c
> @@ -113,38 +113,6 @@ static const struct drm_plane_funcs primary_plane_funcs = {
> .destroy = drm_plane_helper_destroy,
> };
>
> -static struct drm_plane *create_primary_plane(struct drm_device *dev)
> -{
> - struct drm_plane *primary;
> - int ret;
> -
> - primary = kzalloc(sizeof(*primary), GFP_KERNEL);
> - if (primary == NULL) {
> - DRM_DEBUG_KMS("Failed to allocate primary plane\n");
> - return NULL;
> - }
> -
> - /*
> - * Remove the format_default field from drm_plane when dropping
> - * this helper.
> - */
> - primary->format_default = true;
> -
> - /* possible_crtc's will be filled in later by crtc_init */
> - ret = drm_universal_plane_init(dev, primary, 0,
> - &primary_plane_funcs,
> - safe_modeset_formats,
> - ARRAY_SIZE(safe_modeset_formats),
> - NULL,
> - DRM_PLANE_TYPE_PRIMARY, NULL);
> - if (ret) {
> - kfree(primary);
> - primary = NULL;
> - }
> -
> - return primary;
> -}
> -
> /**
> * drm_crtc_init - Legacy CRTC initialization function
> * @dev: DRM device
> @@ -176,10 +144,33 @@ int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
> const struct drm_crtc_funcs *funcs)
> {
> struct drm_plane *primary;
> + int ret;
> +
> + /* possible_crtc's will be filled in later by crtc_init */
> + primary = __drm_universal_plane_alloc(dev, sizeof(*primary), 0, 0,
> + &primary_plane_funcs,
> + safe_modeset_formats,
> + ARRAY_SIZE(safe_modeset_formats),
> + NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
> + if (IS_ERR(primary))
> + return PTR_ERR(primary);
>
> - primary = create_primary_plane(dev);
> - return drm_crtc_init_with_planes(dev, crtc, primary, NULL, funcs,
> - NULL);
> + /*
> + * Remove the format_default field from drm_plane when dropping
> + * this helper.
> + */
> + primary->format_default = true;
> +
> + ret = drm_crtc_init_with_planes(dev, crtc, primary, NULL, funcs, NULL);
> + if (ret)
> + goto err_drm_plane_cleanup;
> +
> + return 0;
> +
> +err_drm_plane_cleanup:
> + drm_plane_cleanup(primary);
> + kfree(primary);
> + return ret;
> }
> EXPORT_SYMBOL(drm_crtc_init);
>
> diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> index 0f14b4d3bb10..33357629a7f5 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -448,6 +448,44 @@ void *__drmm_universal_plane_alloc(struct drm_device *dev, size_t size,
> }
> EXPORT_SYMBOL(__drmm_universal_plane_alloc);
>
> +void *__drm_universal_plane_alloc(struct drm_device *dev, size_t size,
> + size_t offset, uint32_t possible_crtcs,
> + const struct drm_plane_funcs *funcs,
> + const uint32_t *formats, unsigned int format_count,
> + const uint64_t *format_modifiers,
> + enum drm_plane_type type,
> + const char *name, ...)
> +{
> + void *container;
> + struct drm_plane *plane;
> + va_list ap;
> + int ret;
> +
> + if (drm_WARN_ON(dev, !funcs))
> + return ERR_PTR(-EINVAL);
> +
> + container = kzalloc(size, GFP_KERNEL);
> + if (!container)
> + return ERR_PTR(-ENOMEM);
> +
> + plane = container + offset;
> +
> + va_start(ap, name);
> + ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
> + formats, format_count, format_modifiers,
> + type, name, ap);
> + va_end(ap);
> + if (ret)
> + goto err_kfree;
> +
> + return container;
> +
> +err_kfree:
> + kfree(container);
> + return ERR_PTR(ret);
> +}
> +EXPORT_SYMBOL(__drm_universal_plane_alloc);
> +
> int drm_plane_register_all(struct drm_device *dev)
> {
> unsigned int num_planes = 0;
> diff --git a/drivers/gpu/drm/nouveau/dispnv04/crtc.c b/drivers/gpu/drm/nouveau/dispnv04/crtc.c
> index 660c4cbc0b3d..6b8a014b5e97 100644
> --- a/drivers/gpu/drm/nouveau/dispnv04/crtc.c
> +++ b/drivers/gpu/drm/nouveau/dispnv04/crtc.c
> @@ -1281,32 +1281,6 @@ static const struct drm_plane_funcs nv04_primary_plane_funcs = {
> .destroy = drm_plane_helper_destroy,
> };
>
> -static struct drm_plane *
> -create_primary_plane(struct drm_device *dev)
> -{
> - struct drm_plane *primary;
> - int ret;
> -
> - primary = kzalloc(sizeof(*primary), GFP_KERNEL);
> - if (primary == NULL) {
> - DRM_DEBUG_KMS("Failed to allocate primary plane\n");
> - return NULL;
> - }
> -
> - /* possible_crtc's will be filled in later by crtc_init */
> - ret = drm_universal_plane_init(dev, primary, 0,
> - &nv04_primary_plane_funcs,
> - modeset_formats,
> - ARRAY_SIZE(modeset_formats), NULL,
> - DRM_PLANE_TYPE_PRIMARY, NULL);
> - if (ret) {
> - kfree(primary);
> - primary = NULL;
> - }
> -
> - return primary;
> -}
> -
> static int nv04_crtc_vblank_handler(struct nvif_notify *notify)
> {
> struct nouveau_crtc *nv_crtc =
> @@ -1321,6 +1295,7 @@ nv04_crtc_create(struct drm_device *dev, int crtc_num)
> {
> struct nouveau_display *disp = nouveau_display(dev);
> struct nouveau_crtc *nv_crtc;
> + struct drm_plane *primary;
> int ret;
>
> nv_crtc = kzalloc(sizeof(*nv_crtc), GFP_KERNEL);
> @@ -1335,8 +1310,18 @@ nv04_crtc_create(struct drm_device *dev, int crtc_num)
> nv_crtc->save = nv_crtc_save;
> nv_crtc->restore = nv_crtc_restore;
>
> - drm_crtc_init_with_planes(dev, &nv_crtc->base,
> - create_primary_plane(dev), NULL,
> + primary = __drm_universal_plane_alloc(dev, sizeof(*primary), 0, 0,
> + &nv04_primary_plane_funcs,
> + modeset_formats,
> + ARRAY_SIZE(modeset_formats), NULL,
> + DRM_PLANE_TYPE_PRIMARY, NULL);
> + if (IS_ERR(primary)) {
> + ret = PTR_ERR(primary);
> + kfree(nv_crtc);
> + return ret;
> + }
> +
> + drm_crtc_init_with_planes(dev, &nv_crtc->base, primary, NULL,
> &nv04_crtc_funcs, NULL);
> drm_crtc_helper_add(&nv_crtc->base, &nv04_crtc_helper_funcs);
> drm_mode_crtc_set_gamma_size(&nv_crtc->base, 256);
> diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
> index 910cb941f3d5..21dfa7f97948 100644
> --- a/include/drm/drm_plane.h
> +++ b/include/drm/drm_plane.h
> @@ -809,6 +809,50 @@ void *__drmm_universal_plane_alloc(struct drm_device *dev,
> format_count, format_modifiers, \
> plane_type, name, ##__VA_ARGS__))
>
> +__printf(10, 11)
> +void *__drm_universal_plane_alloc(struct drm_device *dev,
> + size_t size, size_t offset,
> + uint32_t possible_crtcs,
> + const struct drm_plane_funcs *funcs,
> + const uint32_t *formats,
> + unsigned int format_count,
> + const uint64_t *format_modifiers,
> + enum drm_plane_type plane_type,
> + const char *name, ...);
> +
> +/**
> + * drm_universal_plane_alloc - Allocate and initialize an universal plane object
> + * @dev: DRM device
> + * @type: the type of the struct which contains struct &drm_plane
> + * @member: the name of the &drm_plane within @type
> + * @possible_crtcs: bitmask of possible CRTCs
> + * @funcs: callbacks for the new plane
> + * @formats: array of supported formats (DRM_FORMAT\_\*)
> + * @format_count: number of elements in @formats
> + * @format_modifiers: array of struct drm_format modifiers terminated by
> + * DRM_FORMAT_MOD_INVALID
> + * @plane_type: type of plane (overlay, primary, cursor)
> + * @name: printf style format string for the plane name, or NULL for default name
> + *
> + * Allocates and initializes a plane object of type @type. The caller
> + * is responsible for releasing the allocated memory with kfree().
> + *
> + * Drivers are encouraged to use drmm_universal_plane_alloc() instead.
> + *
> + * Drivers that only support the DRM_FORMAT_MOD_LINEAR modifier support may set
> + * @format_modifiers to NULL. The plane will advertise the linear modifier.
> + *
> + * Returns:
> + * Pointer to new plane, or ERR_PTR on failure.
> + */
> +#define drm_universal_plane_alloc(dev, type, member, possible_crtcs, funcs, formats, \
> + format_count, format_modifiers, plane_type, name, ...) \
> + ((type *)__drm_universal_plane_alloc(dev, sizeof(type), \
> + offsetof(type, member), \
> + possible_crtcs, funcs, formats, \
> + format_count, format_modifiers, \
> + plane_type, name, ##__VA_ARGS__))
> +
> /**
> * drm_plane_index - find the index of a registered plane
> * @plane: plane to find index for
> --
> 2.37.2
>
--
Regards,
Laurent Pinchart
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