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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_atomic_helper_plane_duplicate_state(plane, state);
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_crtc_state *crtc_state;
115 struct intel_plane *intel_plane = to_intel_plane(plane);
116 struct intel_plane_state *intel_state = to_intel_plane_state(state);
118 crtc = crtc ? crtc : plane->crtc;
119 intel_crtc = to_intel_crtc(crtc);
122 * Both crtc and plane->crtc could be NULL if we're updating a
123 * property while the plane is disabled. We don't actually have
124 * anything driver-specific we need to test in that case, so
125 * just return success.
130 /* FIXME: temporary hack necessary while we still use the plane update
134 intel_atomic_get_crtc_state(state->state, intel_crtc);
135 if (IS_ERR(crtc_state))
136 return PTR_ERR(crtc_state);
138 crtc_state = intel_crtc->config;
142 * The original src/dest coordinates are stored in state->base, but
143 * we want to keep another copy internal to our driver that we can
144 * clip/modify ourselves.
146 intel_state->src.x1 = state->src_x;
147 intel_state->src.y1 = state->src_y;
148 intel_state->src.x2 = state->src_x + state->src_w;
149 intel_state->src.y2 = state->src_y + state->src_h;
150 intel_state->dst.x1 = state->crtc_x;
151 intel_state->dst.y1 = state->crtc_y;
152 intel_state->dst.x2 = state->crtc_x + state->crtc_w;
153 intel_state->dst.y2 = state->crtc_y + state->crtc_h;
155 /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
156 intel_state->clip.x1 = 0;
157 intel_state->clip.y1 = 0;
158 intel_state->clip.x2 =
159 crtc_state->base.active ? crtc_state->pipe_src_w : 0;
160 intel_state->clip.y2 =
161 crtc_state->base.active ? crtc_state->pipe_src_h : 0;
164 * Disabling a plane is always okay; we just need to update
165 * fb tracking in a special way since cleanup_fb() won't
166 * get called by the plane helpers.
168 if (state->fb == NULL && plane->state->fb != NULL) {
170 * 'prepare' is never called when plane is being disabled, so
171 * we need to handle frontbuffer tracking as a special case
173 intel_crtc->atomic.disabled_planes |=
174 (1 << drm_plane_index(plane));
177 if (state->fb && intel_rotation_90_or_270(state->rotation)) {
178 if (!(state->fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
179 state->fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED)) {
180 DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
185 * 90/270 is not allowed with RGB64 16:16:16:16,
186 * RGB 16-bit 5:6:5, and Indexed 8-bit.
187 * TBD: Add RGB64 case once its added in supported format list.
189 switch (state->fb->pixel_format) {
191 case DRM_FORMAT_RGB565:
192 DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
193 drm_get_format_name(state->fb->pixel_format));
201 return intel_plane->check_plane(plane, intel_state);
204 static void intel_plane_atomic_update(struct drm_plane *plane,
205 struct drm_plane_state *old_state)
207 struct intel_plane *intel_plane = to_intel_plane(plane);
208 struct intel_plane_state *intel_state =
209 to_intel_plane_state(plane->state);
211 intel_plane->commit_plane(plane, intel_state);
214 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
215 .prepare_fb = intel_prepare_plane_fb,
216 .cleanup_fb = intel_cleanup_plane_fb,
217 .atomic_check = intel_plane_atomic_check,
218 .atomic_update = intel_plane_atomic_update,
222 * intel_plane_atomic_get_property - fetch plane property value
223 * @plane: plane to fetch property for
224 * @state: state containing the property value
225 * @property: property to look up
226 * @val: pointer to write property value into
228 * The DRM core does not store shadow copies of properties for
229 * atomic-capable drivers. This entrypoint is used to fetch
230 * the current value of a driver-specific plane property.
233 intel_plane_atomic_get_property(struct drm_plane *plane,
234 const struct drm_plane_state *state,
235 struct drm_property *property,
238 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
243 * intel_plane_atomic_set_property - set plane property value
244 * @plane: plane to set property for
245 * @state: state to update property value in
246 * @property: property to set
247 * @val: value to set property to
249 * Writes the specified property value for a plane into the provided atomic
252 * Returns 0 on success, -EINVAL on unrecognized properties
255 intel_plane_atomic_set_property(struct drm_plane *plane,
256 struct drm_plane_state *state,
257 struct drm_property *property,
260 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);