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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_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);
92 * intel_plane_destroy_state - destroy plane state
94 * @state: state object to destroy
96 * Destroys the plane state (both common and Intel-specific) for the
100 intel_plane_destroy_state(struct drm_plane *plane,
101 struct drm_plane_state *state)
103 drm_atomic_helper_plane_destroy_state(plane, state);
106 int intel_plane_atomic_check_with_state(struct intel_crtc_state *crtc_state,
107 struct intel_plane_state *intel_state)
109 struct drm_plane *plane = intel_state->base.plane;
110 struct drm_i915_private *dev_priv = to_i915(plane->dev);
111 struct drm_plane_state *state = &intel_state->base;
112 struct intel_plane *intel_plane = to_intel_plane(plane);
116 * Both crtc and plane->crtc could be NULL if we're updating a
117 * property while the plane is disabled. We don't actually have
118 * anything driver-specific we need to test in that case, so
119 * just return success.
121 if (!intel_state->base.crtc && !plane->state->crtc)
124 /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
125 intel_state->clip.x1 = 0;
126 intel_state->clip.y1 = 0;
127 intel_state->clip.x2 =
128 crtc_state->base.enable ? crtc_state->pipe_src_w : 0;
129 intel_state->clip.y2 =
130 crtc_state->base.enable ? crtc_state->pipe_src_h : 0;
132 if (state->fb && drm_rotation_90_or_270(state->rotation)) {
133 struct drm_format_name_buf format_name;
135 if (state->fb->modifier != I915_FORMAT_MOD_Y_TILED &&
136 state->fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
137 DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
142 * 90/270 is not allowed with RGB64 16:16:16:16,
143 * RGB 16-bit 5:6:5, and Indexed 8-bit.
144 * TBD: Add RGB64 case once its added in supported format list.
146 switch (state->fb->format->format) {
148 case DRM_FORMAT_RGB565:
149 DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
150 drm_get_format_name(state->fb->format->format,
159 /* CHV ignores the mirror bit when the rotate bit is set :( */
160 if (IS_CHERRYVIEW(dev_priv) &&
161 state->rotation & DRM_ROTATE_180 &&
162 state->rotation & DRM_REFLECT_X) {
163 DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
167 intel_state->base.visible = false;
168 ret = intel_plane->check_plane(plane, crtc_state, intel_state);
172 return intel_plane_atomic_calc_changes(&crtc_state->base, state);
175 static int intel_plane_atomic_check(struct drm_plane *plane,
176 struct drm_plane_state *state)
178 struct drm_crtc *crtc = state->crtc;
179 struct drm_crtc_state *drm_crtc_state;
181 crtc = crtc ? crtc : plane->state->crtc;
184 * Both crtc and plane->crtc could be NULL if we're updating a
185 * property while the plane is disabled. We don't actually have
186 * anything driver-specific we need to test in that case, so
187 * just return success.
192 drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
193 if (WARN_ON(!drm_crtc_state))
196 return intel_plane_atomic_check_with_state(to_intel_crtc_state(drm_crtc_state),
197 to_intel_plane_state(state));
200 static void intel_plane_atomic_update(struct drm_plane *plane,
201 struct drm_plane_state *old_state)
203 struct intel_plane *intel_plane = to_intel_plane(plane);
204 struct intel_plane_state *intel_state =
205 to_intel_plane_state(plane->state);
206 struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
208 if (intel_state->base.visible)
209 intel_plane->update_plane(plane,
210 to_intel_crtc_state(crtc->state),
213 intel_plane->disable_plane(plane, crtc);
216 const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
217 .prepare_fb = intel_prepare_plane_fb,
218 .cleanup_fb = intel_cleanup_plane_fb,
219 .atomic_check = intel_plane_atomic_check,
220 .atomic_update = intel_plane_atomic_update,
224 * intel_plane_atomic_get_property - fetch plane property value
225 * @plane: plane to fetch property for
226 * @state: state containing the property value
227 * @property: property to look up
228 * @val: pointer to write property value into
230 * The DRM core does not store shadow copies of properties for
231 * atomic-capable drivers. This entrypoint is used to fetch
232 * the current value of a driver-specific plane property.
235 intel_plane_atomic_get_property(struct drm_plane *plane,
236 const struct drm_plane_state *state,
237 struct drm_property *property,
240 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
245 * intel_plane_atomic_set_property - set plane property value
246 * @plane: plane to set property for
247 * @state: state to update property value in
248 * @property: property to set
249 * @val: value to set property to
251 * Writes the specified property value for a plane into the provided atomic
254 * Returns 0 on success, -EINVAL on unrecognized properties
257 intel_plane_atomic_set_property(struct drm_plane *plane,
258 struct drm_plane_state *state,
259 struct drm_property *property,
262 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);