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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 = DRM_MODE_ROTATE_0;
59 state->ckey.flags = I915_SET_COLORKEY_NONE;
65 * intel_plane_duplicate_state - duplicate plane state
68 * Allocates and returns a copy of the plane state (both common and
69 * Intel-specific) for the specified plane.
71 * Returns: The newly allocated plane state, or NULL on failure.
73 struct drm_plane_state *
74 intel_plane_duplicate_state(struct drm_plane *plane)
76 struct drm_plane_state *state;
77 struct intel_plane_state *intel_state;
79 intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);
84 state = &intel_state->base;
86 __drm_atomic_helper_plane_duplicate_state(plane, state);
88 intel_state->vma = NULL;
94 * intel_plane_destroy_state - destroy plane state
96 * @state: state object to destroy
98 * Destroys the plane state (both common and Intel-specific) for the
102 intel_plane_destroy_state(struct drm_plane *plane,
103 struct drm_plane_state *state)
105 WARN_ON(to_intel_plane_state(state)->vma);
107 drm_atomic_helper_plane_destroy_state(plane, state);
110 int intel_plane_atomic_check_with_state(struct intel_crtc_state *crtc_state,
111 struct intel_plane_state *intel_state)
113 struct drm_plane *plane = intel_state->base.plane;
114 struct drm_i915_private *dev_priv = to_i915(plane->dev);
115 struct drm_plane_state *state = &intel_state->base;
116 struct intel_plane *intel_plane = to_intel_plane(plane);
120 * Both crtc and plane->crtc could be NULL if we're updating a
121 * property while the plane is disabled. We don't actually have
122 * anything driver-specific we need to test in that case, so
123 * just return success.
125 if (!intel_state->base.crtc && !plane->state->crtc)
128 /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
129 intel_state->clip.x1 = 0;
130 intel_state->clip.y1 = 0;
131 intel_state->clip.x2 =
132 crtc_state->base.enable ? crtc_state->pipe_src_w : 0;
133 intel_state->clip.y2 =
134 crtc_state->base.enable ? crtc_state->pipe_src_h : 0;
136 if (state->fb && drm_rotation_90_or_270(state->rotation)) {
137 struct drm_format_name_buf format_name;
139 if (state->fb->modifier != I915_FORMAT_MOD_Y_TILED &&
140 state->fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
141 DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
146 * 90/270 is not allowed with RGB64 16:16:16:16,
147 * RGB 16-bit 5:6:5, and Indexed 8-bit.
148 * TBD: Add RGB64 case once its added in supported format list.
150 switch (state->fb->format->format) {
152 case DRM_FORMAT_RGB565:
153 DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
154 drm_get_format_name(state->fb->format->format,
163 /* CHV ignores the mirror bit when the rotate bit is set :( */
164 if (IS_CHERRYVIEW(dev_priv) &&
165 state->rotation & DRM_MODE_ROTATE_180 &&
166 state->rotation & DRM_MODE_REFLECT_X) {
167 DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
171 intel_state->base.visible = false;
172 ret = intel_plane->check_plane(intel_plane, crtc_state, intel_state);
176 /* FIXME pre-g4x don't work like this */
177 if (intel_state->base.visible)
178 crtc_state->active_planes |= BIT(intel_plane->id);
180 crtc_state->active_planes &= ~BIT(intel_plane->id);
182 return intel_plane_atomic_calc_changes(&crtc_state->base, state);
185 static int intel_plane_atomic_check(struct drm_plane *plane,
186 struct drm_plane_state *state)
188 struct drm_crtc *crtc = state->crtc;
189 struct drm_crtc_state *drm_crtc_state;
191 crtc = crtc ? crtc : plane->state->crtc;
194 * Both crtc and plane->crtc could be NULL if we're updating a
195 * property while the plane is disabled. We don't actually have
196 * anything driver-specific we need to test in that case, so
197 * just return success.
202 drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
203 if (WARN_ON(!drm_crtc_state))
206 return intel_plane_atomic_check_with_state(to_intel_crtc_state(drm_crtc_state),
207 to_intel_plane_state(state));
210 static void intel_plane_atomic_update(struct drm_plane *plane,
211 struct drm_plane_state *old_state)
213 struct intel_plane *intel_plane = to_intel_plane(plane);
214 struct intel_plane_state *intel_state =
215 to_intel_plane_state(plane->state);
216 struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
218 if (intel_state->base.visible) {
219 trace_intel_update_plane(plane,
220 to_intel_crtc(crtc));
222 intel_plane->update_plane(intel_plane,
223 to_intel_crtc_state(crtc->state),
226 trace_intel_disable_plane(plane,
227 to_intel_crtc(crtc));
229 intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
233 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
234 .prepare_fb = intel_prepare_plane_fb,
235 .cleanup_fb = intel_cleanup_plane_fb,
236 .atomic_check = intel_plane_atomic_check,
237 .atomic_update = intel_plane_atomic_update,
241 * intel_plane_atomic_get_property - fetch plane property value
242 * @plane: plane to fetch property for
243 * @state: state containing the property value
244 * @property: property to look up
245 * @val: pointer to write property value into
247 * The DRM core does not store shadow copies of properties for
248 * atomic-capable drivers. This entrypoint is used to fetch
249 * the current value of a driver-specific plane property.
252 intel_plane_atomic_get_property(struct drm_plane *plane,
253 const struct drm_plane_state *state,
254 struct drm_property *property,
257 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
262 * intel_plane_atomic_set_property - set plane property value
263 * @plane: plane to set property for
264 * @state: state to update property value in
265 * @property: property to set
266 * @val: value to set property to
268 * Writes the specified property value for a plane into the provided atomic
271 * Returns 0 on success, -EINVAL on unrecognized properties
274 intel_plane_atomic_set_property(struct drm_plane *plane,
275 struct drm_plane_state *state,
276 struct drm_property *property,
279 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);