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25 * DOC: atomic plane helpers
27 * The functions here are used by the atomic plane helper functions to
28 * implement legacy plane updates (i.e., drm_plane->update_plane() and
29 * drm_plane->disable_plane()). This allows plane updates to use the
30 * atomic state infrastructure and perform plane updates as separate
31 * prepare/check/commit/cleanup steps.
35 #include <drm/drm_atomic_helper.h>
36 #include <drm/drm_plane_helper.h>
37 #include "intel_drv.h"
40 * intel_create_plane_state - create plane state object
43 * Allocates a fresh plane state for the given plane and sets some of
44 * the state values to sensible initial values.
46 * Returns: A newly allocated plane state, or NULL on failure
48 struct intel_plane_state
*
49 intel_create_plane_state(struct drm_plane
*plane
)
51 struct intel_plane_state
*state
;
53 state
= kzalloc(sizeof(*state
), GFP_KERNEL
);
57 state
->base
.plane
= plane
;
58 state
->base
.rotation
= BIT(DRM_ROTATE_0
);
64 * intel_plane_duplicate_state - duplicate plane state
67 * Allocates and returns a copy of the plane state (both common and
68 * Intel-specific) for the specified plane.
70 * Returns: The newly allocated plane state, or NULL on failure.
72 struct drm_plane_state
*
73 intel_plane_duplicate_state(struct drm_plane
*plane
)
75 struct drm_plane_state
*state
;
76 struct intel_plane_state
*intel_state
;
78 if (WARN_ON(!plane
->state
))
79 intel_state
= intel_create_plane_state(plane
);
81 intel_state
= kmemdup(plane
->state
, sizeof(*intel_state
),
87 state
= &intel_state
->base
;
89 drm_framebuffer_reference(state
->fb
);
95 * intel_plane_destroy_state - destroy plane state
97 * @state: state object to destroy
99 * Destroys the plane state (both common and Intel-specific) for the
103 intel_plane_destroy_state(struct drm_plane
*plane
,
104 struct drm_plane_state
*state
)
106 drm_atomic_helper_plane_destroy_state(plane
, state
);
109 static int intel_plane_atomic_check(struct drm_plane
*plane
,
110 struct drm_plane_state
*state
)
112 struct drm_crtc
*crtc
= state
->crtc
;
113 struct intel_crtc
*intel_crtc
;
114 struct intel_plane
*intel_plane
= to_intel_plane(plane
);
115 struct intel_plane_state
*intel_state
= to_intel_plane_state(state
);
117 crtc
= crtc
? crtc
: plane
->crtc
;
118 intel_crtc
= to_intel_crtc(crtc
);
121 * Both crtc and plane->crtc could be NULL if we're updating a
122 * property while the plane is disabled. We don't actually have
123 * anything driver-specific we need to test in that case, so
124 * just return success.
130 * The original src/dest coordinates are stored in state->base, but
131 * we want to keep another copy internal to our driver that we can
132 * clip/modify ourselves.
134 intel_state
->src
.x1
= state
->src_x
;
135 intel_state
->src
.y1
= state
->src_y
;
136 intel_state
->src
.x2
= state
->src_x
+ state
->src_w
;
137 intel_state
->src
.y2
= state
->src_y
+ state
->src_h
;
138 intel_state
->dst
.x1
= state
->crtc_x
;
139 intel_state
->dst
.y1
= state
->crtc_y
;
140 intel_state
->dst
.x2
= state
->crtc_x
+ state
->crtc_w
;
141 intel_state
->dst
.y2
= state
->crtc_y
+ state
->crtc_h
;
143 /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
144 intel_state
->clip
.x1
= 0;
145 intel_state
->clip
.y1
= 0;
146 intel_state
->clip
.x2
=
147 intel_crtc
->active
? intel_crtc
->config
->pipe_src_w
: 0;
148 intel_state
->clip
.y2
=
149 intel_crtc
->active
? intel_crtc
->config
->pipe_src_h
: 0;
152 * Disabling a plane is always okay; we just need to update
153 * fb tracking in a special way since cleanup_fb() won't
154 * get called by the plane helpers.
156 if (state
->fb
== NULL
&& plane
->state
->fb
!= NULL
) {
158 * 'prepare' is never called when plane is being disabled, so
159 * we need to handle frontbuffer tracking as a special case
161 intel_crtc
->atomic
.disabled_planes
|=
162 (1 << drm_plane_index(plane
));
165 return intel_plane
->check_plane(plane
, intel_state
);
168 static void intel_plane_atomic_update(struct drm_plane
*plane
,
169 struct drm_plane_state
*old_state
)
171 struct intel_plane
*intel_plane
= to_intel_plane(plane
);
172 struct intel_plane_state
*intel_state
=
173 to_intel_plane_state(plane
->state
);
175 /* Don't disable an already disabled plane */
176 if (!plane
->state
->fb
&& !old_state
->fb
)
179 intel_plane
->commit_plane(plane
, intel_state
);
182 const struct drm_plane_helper_funcs intel_plane_helper_funcs
= {
183 .prepare_fb
= intel_prepare_plane_fb
,
184 .cleanup_fb
= intel_cleanup_plane_fb
,
185 .atomic_check
= intel_plane_atomic_check
,
186 .atomic_update
= intel_plane_atomic_update
,
190 * intel_plane_atomic_get_property - fetch plane property value
191 * @plane: plane to fetch property for
192 * @state: state containing the property value
193 * @property: property to look up
194 * @val: pointer to write property value into
196 * The DRM core does not store shadow copies of properties for
197 * atomic-capable drivers. This entrypoint is used to fetch
198 * the current value of a driver-specific plane property.
201 intel_plane_atomic_get_property(struct drm_plane
*plane
,
202 const struct drm_plane_state
*state
,
203 struct drm_property
*property
,
206 struct drm_mode_config
*config
= &plane
->dev
->mode_config
;
208 if (property
== config
->rotation_property
) {
209 *val
= state
->rotation
;
211 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property
->name
);
219 * intel_plane_atomic_set_property - set plane property value
220 * @plane: plane to set property for
221 * @state: state to update property value in
222 * @property: property to set
223 * @val: value to set property to
225 * Writes the specified property value for a plane into the provided atomic
228 * Returns 0 on success, -EINVAL on unrecognized properties
231 intel_plane_atomic_set_property(struct drm_plane
*plane
,
232 struct drm_plane_state
*state
,
233 struct drm_property
*property
,
236 struct drm_mode_config
*config
= &plane
->dev
->mode_config
;
238 if (property
== config
->rotation_property
) {
239 state
->rotation
= val
;
241 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property
->name
);