summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/display/intel_atomic_plane.c
blob: 30bd4e76fff910b43aad0d0bceda13cfb0656eff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
/*
 * Copyright © 2014 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * DOC: atomic plane helpers
 *
 * The functions here are used by the atomic plane helper functions to
 * implement legacy plane updates (i.e., drm_plane->update_plane() and
 * drm_plane->disable_plane()).  This allows plane updates to use the
 * atomic state infrastructure and perform plane updates as separate
 * prepare/check/commit/cleanup steps.
 */

#include <drm/drm_atomic_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_plane_helper.h>

#include "intel_atomic_plane.h"
#include "intel_drv.h"
#include "intel_pm.h"
#include "intel_sprite.h"

struct intel_plane *intel_plane_alloc(void)
{
	struct intel_plane_state *plane_state;
	struct intel_plane *plane;

	plane = kzalloc(sizeof(*plane), GFP_KERNEL);
	if (!plane)
		return ERR_PTR(-ENOMEM);

	plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);
	if (!plane_state) {
		kfree(plane);
		return ERR_PTR(-ENOMEM);
	}

	__drm_atomic_helper_plane_reset(&plane->base, &plane_state->base);
	plane_state->scaler_id = -1;

	return plane;
}

void intel_plane_free(struct intel_plane *plane)
{
	intel_plane_destroy_state(&plane->base, plane->base.state);
	kfree(plane);
}

/**
 * intel_plane_duplicate_state - duplicate plane state
 * @plane: drm plane
 *
 * Allocates and returns a copy of the plane state (both common and
 * Intel-specific) for the specified plane.
 *
 * Returns: The newly allocated plane state, or NULL on failure.
 */
struct drm_plane_state *
intel_plane_duplicate_state(struct drm_plane *plane)
{
	struct drm_plane_state *state;
	struct intel_plane_state *intel_state;

	intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);

	if (!intel_state)
		return NULL;

	state = &intel_state->base;

	__drm_atomic_helper_plane_duplicate_state(plane, state);

	intel_state->vma = NULL;
	intel_state->flags = 0;

	return state;
}

/**
 * intel_plane_destroy_state - destroy plane state
 * @plane: drm plane
 * @state: state object to destroy
 *
 * Destroys the plane state (both common and Intel-specific) for the
 * specified plane.
 */
void
intel_plane_destroy_state(struct drm_plane *plane,
			  struct drm_plane_state *state)
{
	WARN_ON(to_intel_plane_state(state)->vma);

	drm_atomic_helper_plane_destroy_state(plane, state);
}

unsigned int intel_plane_data_rate(const struct intel_crtc_state *crtc_state,
				   const struct intel_plane_state *plane_state)
{
	const struct drm_framebuffer *fb = plane_state->base.fb;
	unsigned int cpp;

	if (!plane_state->base.visible)
		return 0;

	cpp = fb->format->cpp[0];

	/*
	 * Based on HSD#:1408715493
	 * NV12 cpp == 4, P010 cpp == 8
	 *
	 * FIXME what is the logic behind this?
	 */
	if (fb->format->is_yuv && fb->format->num_planes > 1)
		cpp *= 4;

	return cpp * crtc_state->pixel_rate;
}

int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
					struct intel_crtc_state *new_crtc_state,
					const struct intel_plane_state *old_plane_state,
					struct intel_plane_state *new_plane_state)
{
	struct intel_plane *plane = to_intel_plane(new_plane_state->base.plane);
	int ret;

	new_crtc_state->active_planes &= ~BIT(plane->id);
	new_crtc_state->nv12_planes &= ~BIT(plane->id);
	new_crtc_state->c8_planes &= ~BIT(plane->id);
	new_crtc_state->data_rate[plane->id] = 0;
	new_plane_state->base.visible = false;

	if (!new_plane_state->base.crtc && !old_plane_state->base.crtc)
		return 0;

	ret = plane->check_plane(new_crtc_state, new_plane_state);
	if (ret)
		return ret;

	/* FIXME pre-g4x don't work like this */
	if (new_plane_state->base.visible)
		new_crtc_state->active_planes |= BIT(plane->id);

	if (new_plane_state->base.visible &&
	    is_planar_yuv_format(new_plane_state->base.fb->format->format))
		new_crtc_state->nv12_planes |= BIT(plane->id);

	if (new_plane_state->base.visible &&
	    new_plane_state->base.fb->format->format == DRM_FORMAT_C8)
		new_crtc_state->c8_planes |= BIT(plane->id);

	if (new_plane_state->base.visible || old_plane_state->base.visible)
		new_crtc_state->update_planes |= BIT(plane->id);

	new_crtc_state->data_rate[plane->id] =
		intel_plane_data_rate(new_crtc_state, new_plane_state);

	return intel_plane_atomic_calc_changes(old_crtc_state,
					       &new_crtc_state->base,
					       old_plane_state,
					       &new_plane_state->base);
}

static int intel_plane_atomic_check(struct drm_plane *plane,
				    struct drm_plane_state *new_plane_state)
{
	struct drm_atomic_state *state = new_plane_state->state;
	const struct drm_plane_state *old_plane_state =
		drm_atomic_get_old_plane_state(state, plane);
	struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
	const struct drm_crtc_state *old_crtc_state;
	struct drm_crtc_state *new_crtc_state;

	new_plane_state->visible = false;
	if (!crtc)
		return 0;

	old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
	new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);

	return intel_plane_atomic_check_with_state(to_intel_crtc_state(old_crtc_state),
						   to_intel_crtc_state(new_crtc_state),
						   to_intel_plane_state(old_plane_state),
						   to_intel_plane_state(new_plane_state));
}

static struct intel_plane *
skl_next_plane_to_commit(struct intel_atomic_state *state,
			 struct intel_crtc *crtc,
			 struct skl_ddb_entry entries_y[I915_MAX_PLANES],
			 struct skl_ddb_entry entries_uv[I915_MAX_PLANES],
			 unsigned int *update_mask)
{
	struct intel_crtc_state *crtc_state =
		intel_atomic_get_new_crtc_state(state, crtc);
	struct intel_plane_state *plane_state;
	struct intel_plane *plane;
	int i;

	if (*update_mask == 0)
		return NULL;

	for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
		enum plane_id plane_id = plane->id;

		if (crtc->pipe != plane->pipe ||
		    !(*update_mask & BIT(plane_id)))
			continue;

		if (skl_ddb_allocation_overlaps(&crtc_state->wm.skl.plane_ddb_y[plane_id],
						entries_y,
						I915_MAX_PLANES, plane_id) ||
		    skl_ddb_allocation_overlaps(&crtc_state->wm.skl.plane_ddb_uv[plane_id],
						entries_uv,
						I915_MAX_PLANES, plane_id))
			continue;

		*update_mask &= ~BIT(plane_id);
		entries_y[plane_id] = crtc_state->wm.skl.plane_ddb_y[plane_id];
		entries_uv[plane_id] = crtc_state->wm.skl.plane_ddb_uv[plane_id];

		return plane;
	}

	/* should never happen */
	WARN_ON(1);

	return NULL;
}

void intel_update_plane(struct intel_plane *plane,
			const struct intel_crtc_state *crtc_state,
			const struct intel_plane_state *plane_state)
{
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);

	trace_intel_update_plane(&plane->base, crtc);
	plane->update_plane(plane, crtc_state, plane_state);
}

void intel_update_slave(struct intel_plane *plane,
			const struct intel_crtc_state *crtc_state,
			const struct intel_plane_state *plane_state)
{
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);

	trace_intel_update_plane(&plane->base, crtc);
	plane->update_slave(plane, crtc_state, plane_state);
}

void intel_disable_plane(struct intel_plane *plane,
			 const struct intel_crtc_state *crtc_state)
{
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);

	trace_intel_disable_plane(&plane->base, crtc);
	plane->disable_plane(plane, crtc_state);
}

void skl_update_planes_on_crtc(struct intel_atomic_state *state,
			       struct intel_crtc *crtc)
{
	struct intel_crtc_state *old_crtc_state =
		intel_atomic_get_old_crtc_state(state, crtc);
	struct intel_crtc_state *new_crtc_state =
		intel_atomic_get_new_crtc_state(state, crtc);
	struct skl_ddb_entry entries_y[I915_MAX_PLANES];
	struct skl_ddb_entry entries_uv[I915_MAX_PLANES];
	u32 update_mask = new_crtc_state->update_planes;
	struct intel_plane *plane;

	memcpy(entries_y, old_crtc_state->wm.skl.plane_ddb_y,
	       sizeof(old_crtc_state->wm.skl.plane_ddb_y));
	memcpy(entries_uv, old_crtc_state->wm.skl.plane_ddb_uv,
	       sizeof(old_crtc_state->wm.skl.plane_ddb_uv));

	while ((plane = skl_next_plane_to_commit(state, crtc,
						 entries_y, entries_uv,
						 &update_mask))) {
		struct intel_plane_state *new_plane_state =
			intel_atomic_get_new_plane_state(state, plane);

		if (new_plane_state->base.visible) {
			intel_update_plane(plane, new_crtc_state, new_plane_state);
		} else if (new_plane_state->slave) {
			struct intel_plane *master =
				new_plane_state->linked_plane;

			/*
			 * We update the slave plane from this function because
			 * programming it from the master plane's update_plane
			 * callback runs into issues when the Y plane is
			 * reassigned, disabled or used by a different plane.
			 *
			 * The slave plane is updated with the master plane's
			 * plane_state.
			 */
			new_plane_state =
				intel_atomic_get_new_plane_state(state, master);

			intel_update_slave(plane, new_crtc_state, new_plane_state);
		} else {
			intel_disable_plane(plane, new_crtc_state);
		}
	}
}

void i9xx_update_planes_on_crtc(struct intel_atomic_state *state,
				struct intel_crtc *crtc)
{
	struct intel_crtc_state *new_crtc_state =
		intel_atomic_get_new_crtc_state(state, crtc);
	u32 update_mask = new_crtc_state->update_planes;
	struct intel_plane_state *new_plane_state;
	struct intel_plane *plane;
	int i;

	for_each_new_intel_plane_in_state(state, plane, new_plane_state, i) {
		if (crtc->pipe != plane->pipe ||
		    !(update_mask & BIT(plane->id)))
			continue;

		if (new_plane_state->base.visible)
			intel_update_plane(plane, new_crtc_state, new_plane_state);
		else
			intel_disable_plane(plane, new_crtc_state);
	}
}

const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
	.prepare_fb = intel_prepare_plane_fb,
	.cleanup_fb = intel_cleanup_plane_fb,
	.atomic_check = intel_plane_atomic_check,
};