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44d1240d MS |
1 | /* |
2 | * Copyright (C) 2016 Samsung Electronics Co.Ltd | |
3 | * Authors: | |
4 | * Marek Szyprowski <m.szyprowski@samsung.com> | |
5 | * | |
6 | * DRM core plane blending related functions | |
7 | * | |
8 | * Permission to use, copy, modify, distribute, and sell this software and its | |
9 | * documentation for any purpose is hereby granted without fee, provided that | |
10 | * the above copyright notice appear in all copies and that both that copyright | |
11 | * notice and this permission notice appear in supporting documentation, and | |
12 | * that the name of the copyright holders not be used in advertising or | |
13 | * publicity pertaining to distribution of the software without specific, | |
14 | * written prior permission. The copyright holders make no representations | |
15 | * about the suitability of this software for any purpose. It is provided "as | |
16 | * is" without express or implied warranty. | |
17 | * | |
18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
24 | * OF THIS SOFTWARE. | |
25 | */ | |
0500c04e | 26 | |
44d1240d MS |
27 | #include <linux/export.h> |
28 | #include <linux/slab.h> | |
29 | #include <linux/sort.h> | |
30 | ||
0500c04e SR |
31 | #include <drm/drm_atomic.h> |
32 | #include <drm/drm_blend.h> | |
33 | #include <drm/drm_device.h> | |
34 | #include <drm/drm_print.h> | |
35 | ||
c30b4400 | 36 | #include "drm_crtc_internal.h" |
44d1240d | 37 | |
1e4d84c6 DV |
38 | /** |
39 | * DOC: overview | |
40 | * | |
41 | * The basic plane composition model supported by standard plane properties only | |
42 | * has a source rectangle (in logical pixels within the &drm_framebuffer), with | |
43 | * sub-pixel accuracy, which is scaled up to a pixel-aligned destination | |
44 | * rectangle in the visible area of a &drm_crtc. The visible area of a CRTC is | |
45 | * defined by the horizontal and vertical visible pixels (stored in @hdisplay | |
d574528a DV |
46 | * and @vdisplay) of the requested mode (stored in &drm_crtc_state.mode). These |
47 | * two rectangles are both stored in the &drm_plane_state. | |
1e4d84c6 DV |
48 | * |
49 | * For the atomic ioctl the following standard (atomic) properties on the plane object | |
50 | * encode the basic plane composition model: | |
51 | * | |
52 | * SRC_X: | |
53 | * X coordinate offset for the source rectangle within the | |
54 | * &drm_framebuffer, in 16.16 fixed point. Must be positive. | |
55 | * SRC_Y: | |
56 | * Y coordinate offset for the source rectangle within the | |
57 | * &drm_framebuffer, in 16.16 fixed point. Must be positive. | |
58 | * SRC_W: | |
59 | * Width for the source rectangle within the &drm_framebuffer, in 16.16 | |
60 | * fixed point. SRC_X plus SRC_W must be within the width of the source | |
61 | * framebuffer. Must be positive. | |
62 | * SRC_H: | |
63 | * Height for the source rectangle within the &drm_framebuffer, in 16.16 | |
64 | * fixed point. SRC_Y plus SRC_H must be within the height of the source | |
65 | * framebuffer. Must be positive. | |
66 | * CRTC_X: | |
67 | * X coordinate offset for the destination rectangle. Can be negative. | |
68 | * CRTC_Y: | |
69 | * Y coordinate offset for the destination rectangle. Can be negative. | |
70 | * CRTC_W: | |
71 | * Width for the destination rectangle. CRTC_X plus CRTC_W can extend past | |
72 | * the currently visible horizontal area of the &drm_crtc. | |
73 | * CRTC_H: | |
74 | * Height for the destination rectangle. CRTC_Y plus CRTC_H can extend past | |
75 | * the currently visible vertical area of the &drm_crtc. | |
76 | * FB_ID: | |
77 | * Mode object ID of the &drm_framebuffer this plane should scan out. | |
78 | * CRTC_ID: | |
79 | * Mode object ID of the &drm_crtc this plane should be connected to. | |
80 | * | |
81 | * Note that the source rectangle must fully lie within the bounds of the | |
82 | * &drm_framebuffer. The destination rectangle can lie outside of the visible | |
c8337569 | 83 | * area of the current mode of the CRTC. It must be appropriately clipped by the |
1e4d84c6 DV |
84 | * driver, which can be done by calling drm_plane_helper_check_update(). Drivers |
85 | * are also allowed to round the subpixel sampling positions appropriately, but | |
86 | * only to the next full pixel. No pixel outside of the source rectangle may | |
87 | * ever be sampled, which is important when applying more sophisticated | |
88 | * filtering than just a bilinear one when scaling. The filtering mode when | |
89 | * scaling is unspecified. | |
90 | * | |
91 | * On top of this basic transformation additional properties can be exposed by | |
92 | * the driver: | |
93 | * | |
ae0e2826 MR |
94 | * alpha: |
95 | * Alpha is setup with drm_plane_create_alpha_property(). It controls the | |
96 | * plane-wide opacity, from transparent (0) to opaque (0xffff). It can be | |
97 | * combined with pixel alpha. | |
98 | * The pixel values in the framebuffers are expected to not be | |
99 | * pre-multiplied by the global alpha associated to the plane. | |
100 | * | |
4d10bd45 DV |
101 | * rotation: |
102 | * Rotation is set up with drm_plane_create_rotation_property(). It adds a | |
103 | * rotation and reflection step between the source and destination rectangles. | |
104 | * Without this property the rectangle is only scaled, but not rotated or | |
105 | * reflected. | |
1e4d84c6 | 106 | * |
1f86fa15 AG |
107 | * Possbile values: |
108 | * | |
109 | * "rotate-<degrees>": | |
110 | * Signals that a drm plane is rotated <degrees> degrees in counter | |
111 | * clockwise direction. | |
112 | * | |
113 | * "reflect-<axis>": | |
114 | * Signals that the contents of a drm plane is reflected along the | |
115 | * <axis> axis, in the same way as mirroring. | |
116 | * | |
117 | * reflect-x:: | |
118 | * | |
119 | * |o | | o| | |
120 | * | | -> | | | |
121 | * | v| |v | | |
122 | * | |
123 | * reflect-y:: | |
124 | * | |
125 | * |o | | ^| | |
126 | * | | -> | | | |
127 | * | v| |o | | |
128 | * | |
4d10bd45 DV |
129 | * zpos: |
130 | * Z position is set up with drm_plane_create_zpos_immutable_property() and | |
131 | * drm_plane_create_zpos_property(). It controls the visibility of overlapping | |
132 | * planes. Without this property the primary plane is always below the cursor | |
42770cbf DV |
133 | * plane, and ordering between all other planes is undefined. The positive |
134 | * Z axis points towards the user, i.e. planes with lower Z position values | |
8f6ea27b SS |
135 | * are underneath planes with higher Z position values. Two planes with the |
136 | * same Z position value have undefined ordering. Note that the Z position | |
137 | * value can also be immutable, to inform userspace about the hard-coded | |
4dc55525 LP |
138 | * stacking of planes, see drm_plane_create_zpos_immutable_property(). If |
139 | * any plane has a zpos property (either mutable or immutable), then all | |
140 | * planes shall have a zpos property. | |
1e4d84c6 | 141 | * |
a5ec8332 LL |
142 | * pixel blend mode: |
143 | * Pixel blend mode is set up with drm_plane_create_blend_mode_property(). | |
144 | * It adds a blend mode for alpha blending equation selection, describing | |
145 | * how the pixels from the current plane are composited with the | |
146 | * background. | |
147 | * | |
148 | * Three alpha blending equations are defined: | |
149 | * | |
150 | * "None": | |
151 | * Blend formula that ignores the pixel alpha:: | |
152 | * | |
153 | * out.rgb = plane_alpha * fg.rgb + | |
154 | * (1 - plane_alpha) * bg.rgb | |
155 | * | |
156 | * "Pre-multiplied": | |
157 | * Blend formula that assumes the pixel color values | |
158 | * have been already pre-multiplied with the alpha | |
159 | * channel values:: | |
160 | * | |
161 | * out.rgb = plane_alpha * fg.rgb + | |
162 | * (1 - (plane_alpha * fg.alpha)) * bg.rgb | |
163 | * | |
164 | * "Coverage": | |
165 | * Blend formula that assumes the pixel color values have not | |
166 | * been pre-multiplied and will do so when blending them to the | |
167 | * background color values:: | |
168 | * | |
169 | * out.rgb = plane_alpha * fg.alpha * fg.rgb + | |
170 | * (1 - (plane_alpha * fg.alpha)) * bg.rgb | |
171 | * | |
172 | * Using the following symbols: | |
173 | * | |
174 | * "fg.rgb": | |
175 | * Each of the RGB component values from the plane's pixel | |
176 | * "fg.alpha": | |
177 | * Alpha component value from the plane's pixel. If the plane's | |
178 | * pixel format has no alpha component, then this is assumed to be | |
179 | * 1.0. In these cases, this property has no effect, as all three | |
180 | * equations become equivalent. | |
181 | * "bg.rgb": | |
182 | * Each of the RGB component values from the background | |
183 | * "plane_alpha": | |
184 | * Plane alpha value set by the plane "alpha" property. If the | |
185 | * plane does not expose the "alpha" property, then this is | |
186 | * assumed to be 1.0 | |
187 | * | |
1e4d84c6 DV |
188 | * Note that all the property extensions described here apply either to the |
189 | * plane or the CRTC (e.g. for the background color, which currently is not | |
190 | * exposed and assumed to be black). | |
5c759eda PB |
191 | * |
192 | * SCALING_FILTER: | |
5c759eda PB |
193 | * Indicates scaling filter to be used for plane scaler |
194 | * | |
195 | * The value of this property can be one of the following: | |
1187ffc4 | 196 | * |
5c759eda PB |
197 | * Default: |
198 | * Driver's default scaling filter | |
199 | * Nearest Neighbor: | |
200 | * Nearest Neighbor scaling filter | |
201 | * | |
202 | * Drivers can set up this property for a plane by calling | |
203 | * drm_plane_create_scaling_filter_property | |
1e4d84c6 DV |
204 | */ |
205 | ||
ae0e2826 MR |
206 | /** |
207 | * drm_plane_create_alpha_property - create a new alpha property | |
208 | * @plane: drm plane | |
209 | * | |
210 | * This function creates a generic, mutable, alpha property and enables support | |
211 | * for it in the DRM core. It is attached to @plane. | |
212 | * | |
213 | * The alpha property will be allowed to be within the bounds of 0 | |
214 | * (transparent) to 0xffff (opaque). | |
215 | * | |
216 | * Returns: | |
217 | * 0 on success, negative error code on failure. | |
218 | */ | |
219 | int drm_plane_create_alpha_property(struct drm_plane *plane) | |
220 | { | |
221 | struct drm_property *prop; | |
222 | ||
223 | prop = drm_property_create_range(plane->dev, 0, "alpha", | |
224 | 0, DRM_BLEND_ALPHA_OPAQUE); | |
225 | if (!prop) | |
226 | return -ENOMEM; | |
227 | ||
228 | drm_object_attach_property(&plane->base, prop, DRM_BLEND_ALPHA_OPAQUE); | |
229 | plane->alpha_property = prop; | |
230 | ||
231 | if (plane->state) | |
232 | plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | EXPORT_SYMBOL(drm_plane_create_alpha_property); | |
237 | ||
1e4d84c6 | 238 | /** |
6686df8c VS |
239 | * drm_plane_create_rotation_property - create a new rotation property |
240 | * @plane: drm plane | |
241 | * @rotation: initial value of the rotation property | |
1e4d84c6 DV |
242 | * @supported_rotations: bitmask of supported rotations and reflections |
243 | * | |
244 | * This creates a new property with the selected support for transformations. | |
1e4d84c6 DV |
245 | * |
246 | * Since a rotation by 180° degress is the same as reflecting both along the x | |
247 | * and the y axis the rotation property is somewhat redundant. Drivers can use | |
248 | * drm_rotation_simplify() to normalize values of this property. | |
249 | * | |
250 | * The property exposed to userspace is a bitmask property (see | |
251 | * drm_property_create_bitmask()) called "rotation" and has the following | |
252 | * bitmask enumaration values: | |
253 | * | |
c2c446ad | 254 | * DRM_MODE_ROTATE_0: |
1e4d84c6 | 255 | * "rotate-0" |
c2c446ad | 256 | * DRM_MODE_ROTATE_90: |
1e4d84c6 | 257 | * "rotate-90" |
c2c446ad | 258 | * DRM_MODE_ROTATE_180: |
1e4d84c6 | 259 | * "rotate-180" |
c2c446ad | 260 | * DRM_MODE_ROTATE_270: |
1e4d84c6 | 261 | * "rotate-270" |
c2c446ad | 262 | * DRM_MODE_REFLECT_X: |
1e4d84c6 | 263 | * "reflect-x" |
c2c446ad | 264 | * DRM_MODE_REFLECT_Y: |
1e4d84c6 DV |
265 | * "reflect-y" |
266 | * | |
267 | * Rotation is the specified amount in degrees in counter clockwise direction, | |
268 | * the X and Y axis are within the source rectangle, i.e. the X/Y axis before | |
269 | * rotation. After reflection, the rotation is applied to the image sampled from | |
270 | * the source rectangle, before scaling it to fit the destination rectangle. | |
271 | */ | |
d138dd3c VS |
272 | int drm_plane_create_rotation_property(struct drm_plane *plane, |
273 | unsigned int rotation, | |
274 | unsigned int supported_rotations) | |
275 | { | |
276 | static const struct drm_prop_enum_list props[] = { | |
c2c446ad RF |
277 | { __builtin_ffs(DRM_MODE_ROTATE_0) - 1, "rotate-0" }, |
278 | { __builtin_ffs(DRM_MODE_ROTATE_90) - 1, "rotate-90" }, | |
279 | { __builtin_ffs(DRM_MODE_ROTATE_180) - 1, "rotate-180" }, | |
280 | { __builtin_ffs(DRM_MODE_ROTATE_270) - 1, "rotate-270" }, | |
281 | { __builtin_ffs(DRM_MODE_REFLECT_X) - 1, "reflect-x" }, | |
282 | { __builtin_ffs(DRM_MODE_REFLECT_Y) - 1, "reflect-y" }, | |
d138dd3c VS |
283 | }; |
284 | struct drm_property *prop; | |
285 | ||
c2c446ad RF |
286 | WARN_ON((supported_rotations & DRM_MODE_ROTATE_MASK) == 0); |
287 | WARN_ON(!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)); | |
d138dd3c VS |
288 | WARN_ON(rotation & ~supported_rotations); |
289 | ||
290 | prop = drm_property_create_bitmask(plane->dev, 0, "rotation", | |
291 | props, ARRAY_SIZE(props), | |
292 | supported_rotations); | |
293 | if (!prop) | |
294 | return -ENOMEM; | |
295 | ||
296 | drm_object_attach_property(&plane->base, prop, rotation); | |
297 | ||
298 | if (plane->state) | |
299 | plane->state->rotation = rotation; | |
300 | ||
301 | plane->rotation_property = prop; | |
302 | ||
303 | return 0; | |
304 | } | |
305 | EXPORT_SYMBOL(drm_plane_create_rotation_property); | |
306 | ||
18733802 DV |
307 | /** |
308 | * drm_rotation_simplify() - Try to simplify the rotation | |
309 | * @rotation: Rotation to be simplified | |
310 | * @supported_rotations: Supported rotations | |
311 | * | |
312 | * Attempt to simplify the rotation to a form that is supported. | |
c2c446ad | 313 | * Eg. if the hardware supports everything except DRM_MODE_REFLECT_X |
18733802 DV |
314 | * one could call this function like this: |
315 | * | |
c2c446ad RF |
316 | * drm_rotation_simplify(rotation, DRM_MODE_ROTATE_0 | |
317 | * DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 | | |
318 | * DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_Y); | |
18733802 | 319 | * |
a4f24ada | 320 | * to eliminate the DRM_MODE_REFLECT_X flag. Depending on what kind of |
18733802 DV |
321 | * transforms the hardware supports, this function may not |
322 | * be able to produce a supported transform, so the caller should | |
323 | * check the result afterwards. | |
324 | */ | |
325 | unsigned int drm_rotation_simplify(unsigned int rotation, | |
326 | unsigned int supported_rotations) | |
327 | { | |
328 | if (rotation & ~supported_rotations) { | |
c2c446ad RF |
329 | rotation ^= DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y; |
330 | rotation = (rotation & DRM_MODE_REFLECT_MASK) | | |
6d3fb7a8 BMC |
331 | BIT((ffs(rotation & DRM_MODE_ROTATE_MASK) + 1) |
332 | % 4); | |
18733802 DV |
333 | } |
334 | ||
335 | return rotation; | |
336 | } | |
337 | EXPORT_SYMBOL(drm_rotation_simplify); | |
338 | ||
44d1240d MS |
339 | /** |
340 | * drm_plane_create_zpos_property - create mutable zpos property | |
341 | * @plane: drm plane | |
342 | * @zpos: initial value of zpos property | |
343 | * @min: minimal possible value of zpos property | |
344 | * @max: maximal possible value of zpos property | |
345 | * | |
346 | * This function initializes generic mutable zpos property and enables support | |
347 | * for it in drm core. Drivers can then attach this property to planes to enable | |
348 | * support for configurable planes arrangement during blending operation. | |
ca40cfc8 TR |
349 | * Drivers that attach a mutable zpos property to any plane should call the |
350 | * drm_atomic_normalize_zpos() helper during their implementation of | |
351 | * &drm_mode_config_funcs.atomic_check(), which will update the normalized zpos | |
352 | * values and store them in &drm_plane_state.normalized_zpos. Usually min | |
353 | * should be set to 0 and max to maximal number of planes for given crtc - 1. | |
44d1240d MS |
354 | * |
355 | * If zpos of some planes cannot be changed (like fixed background or | |
4dc55525 LP |
356 | * cursor/topmost planes), drivers shall adjust the min/max values and assign |
357 | * those planes immutable zpos properties with lower or higher values (for more | |
1e4d84c6 | 358 | * information, see drm_plane_create_zpos_immutable_property() function). In such |
4dc55525 | 359 | * case drivers shall also assign proper initial zpos values for all planes in |
44d1240d MS |
360 | * its plane_reset() callback, so the planes will be always sorted properly. |
361 | * | |
1e4d84c6 DV |
362 | * See also drm_atomic_normalize_zpos(). |
363 | * | |
364 | * The property exposed to userspace is called "zpos". | |
365 | * | |
44d1240d MS |
366 | * Returns: |
367 | * Zero on success, negative errno on failure. | |
368 | */ | |
369 | int drm_plane_create_zpos_property(struct drm_plane *plane, | |
370 | unsigned int zpos, | |
371 | unsigned int min, unsigned int max) | |
372 | { | |
373 | struct drm_property *prop; | |
374 | ||
375 | prop = drm_property_create_range(plane->dev, 0, "zpos", min, max); | |
376 | if (!prop) | |
377 | return -ENOMEM; | |
378 | ||
379 | drm_object_attach_property(&plane->base, prop, zpos); | |
380 | ||
381 | plane->zpos_property = prop; | |
382 | ||
383 | if (plane->state) { | |
384 | plane->state->zpos = zpos; | |
385 | plane->state->normalized_zpos = zpos; | |
386 | } | |
387 | ||
388 | return 0; | |
389 | } | |
390 | EXPORT_SYMBOL(drm_plane_create_zpos_property); | |
391 | ||
392 | /** | |
393 | * drm_plane_create_zpos_immutable_property - create immuttable zpos property | |
394 | * @plane: drm plane | |
395 | * @zpos: value of zpos property | |
396 | * | |
397 | * This function initializes generic immutable zpos property and enables | |
398 | * support for it in drm core. Using this property driver lets userspace | |
399 | * to get the arrangement of the planes for blending operation and notifies | |
400 | * it that the hardware (or driver) doesn't support changing of the planes' | |
1e4d84c6 DV |
401 | * order. For mutable zpos see drm_plane_create_zpos_property(). |
402 | * | |
403 | * The property exposed to userspace is called "zpos". | |
44d1240d MS |
404 | * |
405 | * Returns: | |
406 | * Zero on success, negative errno on failure. | |
407 | */ | |
408 | int drm_plane_create_zpos_immutable_property(struct drm_plane *plane, | |
409 | unsigned int zpos) | |
410 | { | |
411 | struct drm_property *prop; | |
412 | ||
413 | prop = drm_property_create_range(plane->dev, DRM_MODE_PROP_IMMUTABLE, | |
414 | "zpos", zpos, zpos); | |
415 | if (!prop) | |
416 | return -ENOMEM; | |
417 | ||
418 | drm_object_attach_property(&plane->base, prop, zpos); | |
419 | ||
420 | plane->zpos_property = prop; | |
421 | ||
422 | if (plane->state) { | |
423 | plane->state->zpos = zpos; | |
424 | plane->state->normalized_zpos = zpos; | |
425 | } | |
426 | ||
427 | return 0; | |
428 | } | |
429 | EXPORT_SYMBOL(drm_plane_create_zpos_immutable_property); | |
430 | ||
431 | static int drm_atomic_state_zpos_cmp(const void *a, const void *b) | |
432 | { | |
433 | const struct drm_plane_state *sa = *(struct drm_plane_state **)a; | |
434 | const struct drm_plane_state *sb = *(struct drm_plane_state **)b; | |
435 | ||
436 | if (sa->zpos != sb->zpos) | |
437 | return sa->zpos - sb->zpos; | |
438 | else | |
439 | return sa->plane->base.id - sb->plane->base.id; | |
440 | } | |
441 | ||
44d1240d MS |
442 | static int drm_atomic_helper_crtc_normalize_zpos(struct drm_crtc *crtc, |
443 | struct drm_crtc_state *crtc_state) | |
444 | { | |
445 | struct drm_atomic_state *state = crtc_state->state; | |
446 | struct drm_device *dev = crtc->dev; | |
447 | int total_planes = dev->mode_config.num_total_plane; | |
448 | struct drm_plane_state **states; | |
449 | struct drm_plane *plane; | |
450 | int i, n = 0; | |
451 | int ret = 0; | |
452 | ||
453 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] calculating normalized zpos values\n", | |
454 | crtc->base.id, crtc->name); | |
455 | ||
0ee931c4 | 456 | states = kmalloc_array(total_planes, sizeof(*states), GFP_KERNEL); |
44d1240d MS |
457 | if (!states) |
458 | return -ENOMEM; | |
459 | ||
460 | /* | |
461 | * Normalization process might create new states for planes which | |
462 | * normalized_zpos has to be recalculated. | |
463 | */ | |
464 | drm_for_each_plane_mask(plane, dev, crtc_state->plane_mask) { | |
465 | struct drm_plane_state *plane_state = | |
466 | drm_atomic_get_plane_state(state, plane); | |
467 | if (IS_ERR(plane_state)) { | |
468 | ret = PTR_ERR(plane_state); | |
469 | goto done; | |
470 | } | |
471 | states[n++] = plane_state; | |
472 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] processing zpos value %d\n", | |
473 | plane->base.id, plane->name, | |
474 | plane_state->zpos); | |
475 | } | |
476 | ||
477 | sort(states, n, sizeof(*states), drm_atomic_state_zpos_cmp, NULL); | |
478 | ||
479 | for (i = 0; i < n; i++) { | |
480 | plane = states[i]->plane; | |
481 | ||
482 | states[i]->normalized_zpos = i; | |
483 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] normalized zpos value %d\n", | |
484 | plane->base.id, plane->name, i); | |
485 | } | |
486 | crtc_state->zpos_changed = true; | |
487 | ||
488 | done: | |
489 | kfree(states); | |
490 | return ret; | |
491 | } | |
492 | ||
493 | /** | |
52a9fcda | 494 | * drm_atomic_normalize_zpos - calculate normalized zpos values for all crtcs |
44d1240d MS |
495 | * @dev: DRM device |
496 | * @state: atomic state of DRM device | |
497 | * | |
498 | * This function calculates normalized zpos value for all modified planes in | |
1e4d84c6 DV |
499 | * the provided atomic state of DRM device. |
500 | * | |
501 | * For every CRTC this function checks new states of all planes assigned to | |
502 | * it and calculates normalized zpos value for these planes. Planes are compared | |
503 | * first by their zpos values, then by plane id (if zpos is equal). The plane | |
d574528a DV |
504 | * with lowest zpos value is at the bottom. The &drm_plane_state.normalized_zpos |
505 | * is then filled with unique values from 0 to number of active planes in crtc | |
1e4d84c6 | 506 | * minus one. |
44d1240d MS |
507 | * |
508 | * RETURNS | |
509 | * Zero for success or -errno | |
510 | */ | |
52a9fcda DV |
511 | int drm_atomic_normalize_zpos(struct drm_device *dev, |
512 | struct drm_atomic_state *state) | |
44d1240d MS |
513 | { |
514 | struct drm_crtc *crtc; | |
62c7bdc0 | 515 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
44d1240d | 516 | struct drm_plane *plane; |
62c7bdc0 | 517 | struct drm_plane_state *old_plane_state, *new_plane_state; |
44d1240d MS |
518 | int i, ret = 0; |
519 | ||
62c7bdc0 ML |
520 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
521 | crtc = new_plane_state->crtc; | |
44d1240d MS |
522 | if (!crtc) |
523 | continue; | |
62c7bdc0 ML |
524 | if (old_plane_state->zpos != new_plane_state->zpos) { |
525 | new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc); | |
526 | new_crtc_state->zpos_changed = true; | |
44d1240d MS |
527 | } |
528 | } | |
529 | ||
62c7bdc0 ML |
530 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
531 | if (old_crtc_state->plane_mask != new_crtc_state->plane_mask || | |
532 | new_crtc_state->zpos_changed) { | |
44d1240d | 533 | ret = drm_atomic_helper_crtc_normalize_zpos(crtc, |
62c7bdc0 | 534 | new_crtc_state); |
44d1240d MS |
535 | if (ret) |
536 | return ret; | |
537 | } | |
538 | } | |
539 | return 0; | |
540 | } | |
52a9fcda | 541 | EXPORT_SYMBOL(drm_atomic_normalize_zpos); |
a5ec8332 LL |
542 | |
543 | /** | |
544 | * drm_plane_create_blend_mode_property - create a new blend mode property | |
545 | * @plane: drm plane | |
546 | * @supported_modes: bitmask of supported modes, must include | |
547 | * BIT(DRM_MODE_BLEND_PREMULTI). Current DRM assumption is | |
548 | * that alpha is premultiplied, and old userspace can break if | |
549 | * the property defaults to anything else. | |
550 | * | |
551 | * This creates a new property describing the blend mode. | |
552 | * | |
553 | * The property exposed to userspace is an enumeration property (see | |
554 | * drm_property_create_enum()) called "pixel blend mode" and has the | |
555 | * following enumeration values: | |
556 | * | |
557 | * "None": | |
558 | * Blend formula that ignores the pixel alpha. | |
559 | * | |
560 | * "Pre-multiplied": | |
561 | * Blend formula that assumes the pixel color values have been already | |
562 | * pre-multiplied with the alpha channel values. | |
563 | * | |
564 | * "Coverage": | |
565 | * Blend formula that assumes the pixel color values have not been | |
566 | * pre-multiplied and will do so when blending them to the background color | |
567 | * values. | |
568 | * | |
569 | * RETURNS: | |
570 | * Zero for success or -errno | |
571 | */ | |
572 | int drm_plane_create_blend_mode_property(struct drm_plane *plane, | |
573 | unsigned int supported_modes) | |
574 | { | |
575 | struct drm_device *dev = plane->dev; | |
576 | struct drm_property *prop; | |
577 | static const struct drm_prop_enum_list props[] = { | |
578 | { DRM_MODE_BLEND_PIXEL_NONE, "None" }, | |
579 | { DRM_MODE_BLEND_PREMULTI, "Pre-multiplied" }, | |
580 | { DRM_MODE_BLEND_COVERAGE, "Coverage" }, | |
581 | }; | |
582 | unsigned int valid_mode_mask = BIT(DRM_MODE_BLEND_PIXEL_NONE) | | |
583 | BIT(DRM_MODE_BLEND_PREMULTI) | | |
584 | BIT(DRM_MODE_BLEND_COVERAGE); | |
585 | int i; | |
586 | ||
587 | if (WARN_ON((supported_modes & ~valid_mode_mask) || | |
588 | ((supported_modes & BIT(DRM_MODE_BLEND_PREMULTI)) == 0))) | |
589 | return -EINVAL; | |
590 | ||
591 | prop = drm_property_create(dev, DRM_MODE_PROP_ENUM, | |
592 | "pixel blend mode", | |
593 | hweight32(supported_modes)); | |
594 | if (!prop) | |
595 | return -ENOMEM; | |
596 | ||
597 | for (i = 0; i < ARRAY_SIZE(props); i++) { | |
598 | int ret; | |
599 | ||
600 | if (!(BIT(props[i].type) & supported_modes)) | |
601 | continue; | |
602 | ||
603 | ret = drm_property_add_enum(prop, props[i].type, | |
604 | props[i].name); | |
605 | ||
606 | if (ret) { | |
607 | drm_property_destroy(dev, prop); | |
608 | ||
609 | return ret; | |
610 | } | |
611 | } | |
612 | ||
613 | drm_object_attach_property(&plane->base, prop, DRM_MODE_BLEND_PREMULTI); | |
614 | plane->blend_mode_property = prop; | |
615 | ||
616 | return 0; | |
617 | } | |
618 | EXPORT_SYMBOL(drm_plane_create_blend_mode_property); |