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1/*
2 * Copyright © 2014 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24/**
25 * DOC: atomic plane helpers
26 *
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.
32 */
33
34#include <drm/drmP.h>
35#include <drm/drm_atomic_helper.h>
36#include <drm/drm_plane_helper.h>
37#include "intel_drv.h"
38
39/**
40 * intel_create_plane_state - create plane state object
41 * @plane: drm plane
42 *
43 * Allocates a fresh plane state for the given plane and sets some of
44 * the state values to sensible initial values.
45 *
46 * Returns: A newly allocated plane state, or NULL on failure
47 */
48struct intel_plane_state *
49intel_create_plane_state(struct drm_plane *plane)
50{
51 struct intel_plane_state *state;
52
53 state = kzalloc(sizeof(*state), GFP_KERNEL);
54 if (!state)
55 return NULL;
56
57 state->base.plane = plane;
58 state->base.rotation = DRM_MODE_ROTATE_0;
59
60 return state;
61}
62
63/**
64 * intel_plane_duplicate_state - duplicate plane state
65 * @plane: drm plane
66 *
67 * Allocates and returns a copy of the plane state (both common and
68 * Intel-specific) for the specified plane.
69 *
70 * Returns: The newly allocated plane state, or NULL on failure.
71 */
72struct drm_plane_state *
73intel_plane_duplicate_state(struct drm_plane *plane)
74{
75 struct drm_plane_state *state;
76 struct intel_plane_state *intel_state;
77
78 intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);
79
80 if (!intel_state)
81 return NULL;
82
83 state = &intel_state->base;
84
85 __drm_atomic_helper_plane_duplicate_state(plane, state);
86
87 intel_state->vma = NULL;
88 intel_state->flags = 0;
89
90 return state;
91}
92
93/**
94 * intel_plane_destroy_state - destroy plane state
95 * @plane: drm plane
96 * @state: state object to destroy
97 *
98 * Destroys the plane state (both common and Intel-specific) for the
99 * specified plane.
100 */
101void
102intel_plane_destroy_state(struct drm_plane *plane,
103 struct drm_plane_state *state)
104{
105 WARN_ON(to_intel_plane_state(state)->vma);
106
107 drm_atomic_helper_plane_destroy_state(plane, state);
108}
109
110int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
111 struct intel_crtc_state *crtc_state,
112 const struct intel_plane_state *old_plane_state,
113 struct intel_plane_state *intel_state)
114{
115 struct drm_plane *plane = intel_state->base.plane;
116 struct drm_i915_private *dev_priv = to_i915(plane->dev);
117 struct drm_plane_state *state = &intel_state->base;
118 struct intel_plane *intel_plane = to_intel_plane(plane);
119 const struct drm_display_mode *adjusted_mode =
120 &crtc_state->base.adjusted_mode;
121 int ret;
122
123 /*
124 * Both crtc and plane->crtc could be NULL if we're updating a
125 * property while the plane is disabled. We don't actually have
126 * anything driver-specific we need to test in that case, so
127 * just return success.
128 */
129 if (!intel_state->base.crtc && !old_plane_state->base.crtc)
130 return 0;
131
132 if (state->fb && drm_rotation_90_or_270(state->rotation)) {
133 struct drm_format_name_buf format_name;
134
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");
138 return -EINVAL;
139 }
140
141 /*
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.
145 */
146 switch (state->fb->format->format) {
147 case DRM_FORMAT_C8:
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,
151 &format_name));
152 return -EINVAL;
153
154 default:
155 break;
156 }
157 }
158
159 /* CHV ignores the mirror bit when the rotate bit is set :( */
160 if (IS_CHERRYVIEW(dev_priv) &&
161 state->rotation & DRM_MODE_ROTATE_180 &&
162 state->rotation & DRM_MODE_REFLECT_X) {
163 DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
164 return -EINVAL;
165 }
166
167 intel_state->base.visible = false;
168 ret = intel_plane->check_plane(intel_plane, crtc_state, intel_state);
169 if (ret)
170 return ret;
171
172 /*
173 * Y-tiling is not supported in IF-ID Interlace mode in
174 * GEN9 and above.
175 */
176 if (state->fb && INTEL_GEN(dev_priv) >= 9 && crtc_state->base.enable &&
177 adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
178 if (state->fb->modifier == I915_FORMAT_MOD_Y_TILED ||
179 state->fb->modifier == I915_FORMAT_MOD_Yf_TILED) {
180 DRM_DEBUG_KMS("Y/Yf tiling not supported in IF-ID mode\n");
181 return -EINVAL;
182 }
183 }
184
185 /* FIXME pre-g4x don't work like this */
186 if (intel_state->base.visible)
187 crtc_state->active_planes |= BIT(intel_plane->id);
188 else
189 crtc_state->active_planes &= ~BIT(intel_plane->id);
190
191 return intel_plane_atomic_calc_changes(old_crtc_state,
192 &crtc_state->base,
193 old_plane_state,
194 state);
195}
196
197static int intel_plane_atomic_check(struct drm_plane *plane,
198 struct drm_plane_state *new_plane_state)
199{
200 struct drm_atomic_state *state = new_plane_state->state;
201 const struct drm_plane_state *old_plane_state =
202 drm_atomic_get_old_plane_state(state, plane);
203 struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
204 const struct drm_crtc_state *old_crtc_state;
205 struct drm_crtc_state *new_crtc_state;
206
207 /*
208 * Both crtc and plane->crtc could be NULL if we're updating a
209 * property while the plane is disabled. We don't actually have
210 * anything driver-specific we need to test in that case, so
211 * just return success.
212 */
213 if (!crtc)
214 return 0;
215
216 old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
217 new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
218
219 return intel_plane_atomic_check_with_state(to_intel_crtc_state(old_crtc_state),
220 to_intel_crtc_state(new_crtc_state),
221 to_intel_plane_state(old_plane_state),
222 to_intel_plane_state(new_plane_state));
223}
224
225static void intel_plane_atomic_update(struct drm_plane *plane,
226 struct drm_plane_state *old_state)
227{
228 struct intel_atomic_state *state = to_intel_atomic_state(old_state->state);
229 struct intel_plane *intel_plane = to_intel_plane(plane);
230 const struct intel_plane_state *new_plane_state =
231 intel_atomic_get_new_plane_state(state, intel_plane);
232 struct drm_crtc *crtc = new_plane_state->base.crtc ?: old_state->crtc;
233
234 if (new_plane_state->base.visible) {
235 const struct intel_crtc_state *new_crtc_state =
236 intel_atomic_get_new_crtc_state(state, to_intel_crtc(crtc));
237
238 trace_intel_update_plane(plane,
239 to_intel_crtc(crtc));
240
241 intel_plane->update_plane(intel_plane,
242 new_crtc_state, new_plane_state);
243 } else {
244 trace_intel_disable_plane(plane,
245 to_intel_crtc(crtc));
246
247 intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
248 }
249}
250
251const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
252 .prepare_fb = intel_prepare_plane_fb,
253 .cleanup_fb = intel_cleanup_plane_fb,
254 .atomic_check = intel_plane_atomic_check,
255 .atomic_update = intel_plane_atomic_update,
256};
257
258/**
259 * intel_plane_atomic_get_property - fetch plane property value
260 * @plane: plane to fetch property for
261 * @state: state containing the property value
262 * @property: property to look up
263 * @val: pointer to write property value into
264 *
265 * The DRM core does not store shadow copies of properties for
266 * atomic-capable drivers. This entrypoint is used to fetch
267 * the current value of a driver-specific plane property.
268 */
269int
270intel_plane_atomic_get_property(struct drm_plane *plane,
271 const struct drm_plane_state *state,
272 struct drm_property *property,
273 uint64_t *val)
274{
275 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
276 return -EINVAL;
277}
278
279/**
280 * intel_plane_atomic_set_property - set plane property value
281 * @plane: plane to set property for
282 * @state: state to update property value in
283 * @property: property to set
284 * @val: value to set property to
285 *
286 * Writes the specified property value for a plane into the provided atomic
287 * state object.
288 *
289 * Returns 0 on success, -EINVAL on unrecognized properties
290 */
291int
292intel_plane_atomic_set_property(struct drm_plane *plane,
293 struct drm_plane_state *state,
294 struct drm_property *property,
295 uint64_t val)
296{
297 DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);
298 return -EINVAL;
299}