drm/plane: Allocate planes with drm_universal_plane_alloc()

Provide drm_univeral_plane_alloc() to allocate and initialize a
plane. Code for non-atomic drivers uses this pattern. Convert them 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().

v2:
	* kerneldoc fixes (Javier)
	* grammar fixes in commit message

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com> # nouveau
Link: https://patchwork.freedesktop.org/patch/msgid/20220909105947.6487-3-tzimmermann@suse.de

1 files changed, 38 insertions, 0 deletions

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;