diff options
| author | Anusha Srivatsa <asrivats@redhat.com> | 2025-03-31 11:15:25 -0400 |
|---|---|---|
| committer | Maxime Ripard <mripard@kernel.org> | 2025-04-01 16:58:03 +0200 |
| commit | ed9c594d495deb676825489032cee0a03ce29bf9 (patch) | |
| tree | d0901259a3fd3c58fe56cbb245d7b0b19372e8af /drivers/gpu/drm/drm_panel.c | |
| parent | 65931bbc5177f8192a48a0aa5bdb9b95b9f6e87f (diff) | |
drm/panel: Add new helpers for refcounted panel allocatons
Introduce reference counted allocations for panels to avoid
use-after-free. The patch adds the macro devm_drm_bridge_alloc()
to allocate a new refcounted panel. Followed the documentation for
drmm_encoder_alloc() and devm_drm_dev_alloc and other similar
implementations for this purpose.
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Anusha Srivatsa <asrivats@redhat.com>
Link: https://lore.kernel.org/r/20250331-b4-panel-refcounting-v4-1-dad50c60c6c9@redhat.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/drm_panel.c')
| -rw-r--r-- | drivers/gpu/drm/drm_panel.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index c627e42a7ce7..bdeab5710ee3 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -355,6 +355,31 @@ struct drm_panel *of_drm_find_panel(const struct device_node *np) } EXPORT_SYMBOL(of_drm_find_panel); +void *__devm_drm_panel_alloc(struct device *dev, size_t size, size_t offset, + const struct drm_panel_funcs *funcs, + int connector_type) +{ + void *container; + struct drm_panel *panel; + + if (!funcs) { + dev_warn(dev, "Missing funcs pointer\n"); + return ERR_PTR(-EINVAL); + } + + container = devm_kzalloc(dev, size, GFP_KERNEL); + if (!container) + return ERR_PTR(-ENOMEM); + + panel = container + offset; + panel->funcs = funcs; + + drm_panel_init(panel, dev, funcs, connector_type); + + return container; +} +EXPORT_SYMBOL(__devm_drm_panel_alloc); + /** * of_drm_get_panel_orientation - look up the orientation of the panel through * the "rotation" binding from a device tree node |