Subclass plane state struct to enable storing driver's private
state. This patch only adds the base drm_plane_state struct and
the atomic functions that handle it.
Signed-off-by: Haneen Mohammed <hamohammed...@gmail.com>
Reviewed-by: Sean Paul <seanp...@chromium.org>
---
drivers/gpu/drm/vkms/vkms_drv.h | 11 ++++++++
drivers/gpu/drm/vkms/vkms_plane.c | 47 +++++++++++++++++++++++++++++--
2 files changed, 55 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 75e52d61e65d..a1b206643c10 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -20,6 +20,14 @@ static const u32 vkms_formats[] = {
DRM_FORMAT_XRGB8888,
};
+/**
+ * vkms_plane_state - Driver specific plane state
+ * @base: base plane state
+ */
+struct vkms_plane_state {
+ struct drm_plane_state base;
+};
+
/**
* vkms_crtc_state - Driver specific CRTC state
* @base: base CRTC state
@@ -63,6 +71,9 @@ struct vkms_gem_object {
#define to_vkms_crtc_state(target)\
container_of(target, struct vkms_crtc_state, base)
+#define to_vkms_plane_state(target)\
+ container_of(target, struct vkms_plane_state, base)
+
/* CRTC */
int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
struct drm_plane *primary, struct drm_plane *cursor);
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c
b/drivers/gpu/drm/vkms/vkms_plane.c
index 8191940844e5..70fca22bc51b 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -12,13 +12,54 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
+static struct drm_plane_state *
+vkms_plane_duplicate_state(struct drm_plane *plane)
+{
+ struct vkms_plane_state *vkms_state;
+
+ vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL);
+ if (!vkms_state)
+ return NULL;
+
+ __drm_atomic_helper_plane_duplicate_state(plane,
+ &vkms_state->base);
+
+ return &vkms_state->base;
+}
+
+static void vkms_plane_destroy_state(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct vkms_plane_state *vkms_state = to_vkms_plane_state(old_state);
+
+ __drm_atomic_helper_plane_destroy_state(old_state);
+ kfree(vkms_state);
+}
+
+static void vkms_plane_reset(struct drm_plane *plane)
+{
+ struct vkms_plane_state *vkms_state;
+
+ if (plane->state)
+ vkms_plane_destroy_state(plane, plane->state);
+
+ vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL);
+ if (!vkms_state) {
+ DRM_ERROR("Cannot allocate vkms_plane_state\n");
+ return;
+ }
+
+ plane->state = &vkms_state->base;
+ plane->state->plane = plane;
+}
+
static const struct drm_plane_funcs vkms_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = drm_plane_cleanup,
- .reset = drm_atomic_helper_plane_reset,
- .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+ .reset = vkms_plane_reset,
+ .atomic_duplicate_state = vkms_plane_duplicate_state,
+ .atomic_destroy_state = vkms_plane_destroy_state,
};
static void vkms_primary_plane_update(struct drm_plane *plane,
--
2.17.1
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