summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/intel_atomic_plane.c
blob: b82de3072d4f802653127e46a2e141871d2d0e94 (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
/*
 * 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/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
#include "intel_drv.h"

/**
 * intel_create_plane_state - create plane state object
 * @plane: drm plane
 *
 * Allocates a fresh plane state for the given plane and sets some of
 * the state values to sensible initial values.
 *
 * Returns: A newly allocated plane state, or NULL on failure
 */
struct intel_plane_state *
intel_create_plane_state(struct drm_plane *plane)
{
	struct intel_plane_state *state;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		return NULL;

	state->base.plane = plane;
	state->base.rotation = DRM_ROTATE_0;
	state->ckey.flags = I915_SET_COLORKEY_NONE;

	return state;
}

/**
 * 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->wait_req = NULL;

	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(state && to_intel_plane_state(state)->wait_req);
	drm_atomic_helper_plane_destroy_state(plane, state);
}

static int intel_plane_atomic_check(struct drm_plane *plane,
				    struct drm_plane_state *state)
{
	struct drm_crtc *crtc = state->crtc;
	struct intel_crtc *intel_crtc;
	struct intel_crtc_state *crtc_state;
	struct intel_plane *intel_plane = to_intel_plane(plane);
	struct intel_plane_state *intel_state = to_intel_plane_state(state);
	struct drm_crtc_state *drm_crtc_state;
	int ret;

	crtc = crtc ? crtc : plane->state->crtc;
	intel_crtc = to_intel_crtc(crtc);

	/*
	 * Both crtc and plane->crtc could be NULL if we're updating a
	 * property while the plane is disabled.  We don't actually have
	 * anything driver-specific we need to test in that case, so
	 * just return success.
	 */
	if (!crtc)
		return 0;

	drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
	if (WARN_ON(!drm_crtc_state))
		return -EINVAL;

	crtc_state = to_intel_crtc_state(drm_crtc_state);

	/* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
	intel_state->clip.x1 = 0;
	intel_state->clip.y1 = 0;
	intel_state->clip.x2 =
		crtc_state->base.enable ? crtc_state->pipe_src_w : 0;
	intel_state->clip.y2 =
		crtc_state->base.enable ? crtc_state->pipe_src_h : 0;

	if (state->fb && intel_rotation_90_or_270(state->rotation)) {
		char *format_name;
		if (!(state->fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
			state->fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED)) {
			DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
			return -EINVAL;
		}

		/*
		 * 90/270 is not allowed with RGB64 16:16:16:16,
		 * RGB 16-bit 5:6:5, and Indexed 8-bit.
		 * TBD: Add RGB64 case once its added in supported format list.
		 */
		switch (state->fb->pixel_format) {
		case DRM_FORMAT_C8:
		case DRM_FORMAT_RGB565:
			format_name = drm_get_format_name(state->fb->pixel_format);
			DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n", format_name);
			kfree(format_name);
			return -EINVAL;

		default:
			break;
		}
	}

	intel_state->base.visible = false;
	ret = intel_plane->check_plane(plane, crtc_state, intel_state);
	if (ret)
		return ret;

	return intel_plane_atomic_calc_changes(&crtc_state->base, state);
}

static void intel_plane_atomic_update(struct drm_plane *plane,
				      struct drm_plane_state *old_state)
{
	struct intel_plane *intel_plane = to_intel_plane(plane);
	struct intel_plane_state *intel_state =
		to_intel_plane_state(plane->state);
	struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;

	if (intel_state->base.visible)
		intel_plane->update_plane(plane,
					  to_intel_crtc_state(crtc->state),
					  intel_state);
	else
		intel_plane->disable_plane(plane, crtc);
}

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,
	.atomic_update = intel_plane_atomic_update,
};

/**
 * intel_plane_atomic_get_property - fetch plane property value
 * @plane: plane to fetch property for
 * @state: state containing the property value
 * @property: property to look up
 * @val: pointer to write property value into
 *
 * The DRM core does not store shadow copies of properties for
 * atomic-capable drivers.  This entrypoint is used to fetch
 * the current value of a driver-specific plane property.
 */
int
intel_plane_atomic_get_property(struct drm_plane *plane,
				const struct drm_plane_state *state,
				struct drm_property *property,
				uint64_t *val)
{
	DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
	return -EINVAL;
}

/**
 * intel_plane_atomic_set_property - set plane property value
 * @plane: plane to set property for
 * @state: state to update property value in
 * @property: property to set
 * @val: value to set property to
 *
 * Writes the specified property value for a plane into the provided atomic
 * state object.
 *
 * Returns 0 on success, -EINVAL on unrecognized properties
 */
int
intel_plane_atomic_set_property(struct drm_plane *plane,
				struct drm_plane_state *state,
				struct drm_property *property,
				uint64_t val)
{
	DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
	return -EINVAL;
}