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path: root/drivers/gpu/drm/sun4i/sunxi_engine.h
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Diffstat (limited to 'drivers/gpu/drm/sun4i/sunxi_engine.h')
-rw-r--r--drivers/gpu/drm/sun4i/sunxi_engine.h90
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h
index 4cb70ae65c79..d317ea04b8aa 100644
--- a/drivers/gpu/drm/sun4i/sunxi_engine.h
+++ b/drivers/gpu/drm/sun4i/sunxi_engine.h
@@ -12,16 +12,106 @@
struct drm_plane;
struct drm_device;
+struct drm_crtc_state;
struct sunxi_engine;
+/**
+ * struct sunxi_engine_ops - helper operations for sunXi engines
+ *
+ * These hooks are used by the common part of the DRM driver to
+ * implement the proper behaviour.
+ */
struct sunxi_engine_ops {
+ /**
+ * @atomic_begin:
+ *
+ * This callback allows to prepare our engine for an atomic
+ * update. This is mirroring the
+ * &drm_crtc_helper_funcs.atomic_begin callback, so any
+ * documentation there applies.
+ *
+ * This function is optional.
+ */
+ void (*atomic_begin)(struct sunxi_engine *engine,
+ struct drm_crtc_state *old_state);
+
+ /**
+ * @atomic_check:
+ *
+ * This callback allows to validate plane-update related CRTC
+ * constraints specific to engines. This is mirroring the
+ * &drm_crtc_helper_funcs.atomic_check callback, so any
+ * documentation there applies.
+ *
+ * This function is optional.
+ *
+ * RETURNS:
+ *
+ * 0 on success or a negative error code.
+ */
+ int (*atomic_check)(struct sunxi_engine *engine,
+ struct drm_crtc_state *state);
+
+ /**
+ * @commit:
+ *
+ * This callback will trigger the hardware switch to commit
+ * the new configuration that has been setup during the next
+ * vblank period.
+ *
+ * This function is optional.
+ */
void (*commit)(struct sunxi_engine *engine);
+
+ /**
+ * @layers_init:
+ *
+ * This callback is used to allocate, initialize and register
+ * the layers supported by that engine.
+ *
+ * This function is mandatory.
+ *
+ * RETURNS:
+ *
+ * The array of struct drm_plane backing the layers, or an
+ * error pointer on failure.
+ */
struct drm_plane **(*layers_init)(struct drm_device *drm,
struct sunxi_engine *engine);
+ /**
+ * @apply_color_correction:
+ *
+ * This callback will enable the color correction in the
+ * engine. This is useful only for the composite output.
+ *
+ * This function is optional.
+ */
void (*apply_color_correction)(struct sunxi_engine *engine);
+
+ /**
+ * @disable_color_correction:
+ *
+ * This callback will stop the color correction in the
+ * engine. This is useful only for the composite output.
+ *
+ * This function is optional.
+ */
void (*disable_color_correction)(struct sunxi_engine *engine);
+
+ /**
+ * @vblank_quirk:
+ *
+ * This callback is used to implement engine-specific
+ * behaviour part of the VBLANK event. It is run with all the
+ * constraints of an interrupt (can't sleep, all local
+ * interrupts disabled) and therefore should be as fast as
+ * possible.
+ *
+ * This function is optional.
+ */
+ void (*vblank_quirk)(struct sunxi_engine *engine);
};
/**