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1/*
2 * Copyright © 2015 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 modeset support
26 *
27 * The functions here implement the state management and hardware programming
28 * dispatch required by the atomic modeset infrastructure.
29 * See intel_atomic_plane.c for the plane-specific atomic functionality.
30 */
31
32#include <drm/drmP.h>
33#include <drm/drm_atomic.h>
34#include <drm/drm_atomic_helper.h>
35#include <drm/drm_plane_helper.h>
36#include "intel_drv.h"
37
38/**
39 * intel_digital_connector_atomic_get_property - hook for connector->atomic_get_property.
40 * @connector: Connector to get the property for.
41 * @state: Connector state to retrieve the property from.
42 * @property: Property to retrieve.
43 * @val: Return value for the property.
44 *
45 * Returns the atomic property value for a digital connector.
46 */
47int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
48 const struct drm_connector_state *state,
49 struct drm_property *property,
50 uint64_t *val)
51{
52 struct drm_device *dev = connector->dev;
53 struct drm_i915_private *dev_priv = to_i915(dev);
54 struct intel_digital_connector_state *intel_conn_state =
55 to_intel_digital_connector_state(state);
56
57 if (property == dev_priv->force_audio_property)
58 *val = intel_conn_state->force_audio;
59 else if (property == dev_priv->broadcast_rgb_property)
60 *val = intel_conn_state->broadcast_rgb;
61 else {
62 DRM_DEBUG_ATOMIC("Unknown property %s\n", property->name);
63 return -EINVAL;
64 }
65
66 return 0;
67}
68
69/**
70 * intel_digital_connector_atomic_set_property - hook for connector->atomic_set_property.
71 * @connector: Connector to set the property for.
72 * @state: Connector state to set the property on.
73 * @property: Property to set.
74 * @val: New value for the property.
75 *
76 * Sets the atomic property value for a digital connector.
77 */
78int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
79 struct drm_connector_state *state,
80 struct drm_property *property,
81 uint64_t val)
82{
83 struct drm_device *dev = connector->dev;
84 struct drm_i915_private *dev_priv = to_i915(dev);
85 struct intel_digital_connector_state *intel_conn_state =
86 to_intel_digital_connector_state(state);
87
88 if (property == dev_priv->force_audio_property) {
89 intel_conn_state->force_audio = val;
90 return 0;
91 }
92
93 if (property == dev_priv->broadcast_rgb_property) {
94 intel_conn_state->broadcast_rgb = val;
95 return 0;
96 }
97
98 DRM_DEBUG_ATOMIC("Unknown property %s\n", property->name);
99 return -EINVAL;
100}
101
102int intel_digital_connector_atomic_check(struct drm_connector *conn,
103 struct drm_connector_state *new_state)
104{
105 struct intel_digital_connector_state *new_conn_state =
106 to_intel_digital_connector_state(new_state);
107 struct drm_connector_state *old_state =
108 drm_atomic_get_old_connector_state(new_state->state, conn);
109 struct intel_digital_connector_state *old_conn_state =
110 to_intel_digital_connector_state(old_state);
111 struct drm_crtc_state *crtc_state;
112
113 intel_hdcp_atomic_check(conn, old_state, new_state);
114
115 if (!new_state->crtc)
116 return 0;
117
118 crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
119
120 /*
121 * These properties are handled by fastset, and might not end
122 * up in a modeset.
123 */
124 if (new_conn_state->force_audio != old_conn_state->force_audio ||
125 new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
126 new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
127 new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode)
128 crtc_state->mode_changed = true;
129
130 return 0;
131}
132
133/**
134 * intel_digital_connector_duplicate_state - duplicate connector state
135 * @connector: digital connector
136 *
137 * Allocates and returns a copy of the connector state (both common and
138 * digital connector specific) for the specified connector.
139 *
140 * Returns: The newly allocated connector state, or NULL on failure.
141 */
142struct drm_connector_state *
143intel_digital_connector_duplicate_state(struct drm_connector *connector)
144{
145 struct intel_digital_connector_state *state;
146
147 state = kmemdup(connector->state, sizeof(*state), GFP_KERNEL);
148 if (!state)
149 return NULL;
150
151 __drm_atomic_helper_connector_duplicate_state(connector, &state->base);
152 return &state->base;
153}
154
155/**
156 * intel_crtc_duplicate_state - duplicate crtc state
157 * @crtc: drm crtc
158 *
159 * Allocates and returns a copy of the crtc state (both common and
160 * Intel-specific) for the specified crtc.
161 *
162 * Returns: The newly allocated crtc state, or NULL on failure.
163 */
164struct drm_crtc_state *
165intel_crtc_duplicate_state(struct drm_crtc *crtc)
166{
167 struct intel_crtc_state *crtc_state;
168
169 crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), GFP_KERNEL);
170 if (!crtc_state)
171 return NULL;
172
173 __drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
174
175 crtc_state->update_pipe = false;
176 crtc_state->disable_lp_wm = false;
177 crtc_state->disable_cxsr = false;
178 crtc_state->update_wm_pre = false;
179 crtc_state->update_wm_post = false;
180 crtc_state->fb_changed = false;
181 crtc_state->fifo_changed = false;
182 crtc_state->wm.need_postvbl_update = false;
183 crtc_state->fb_bits = 0;
184
185 return &crtc_state->base;
186}
187
188/**
189 * intel_crtc_destroy_state - destroy crtc state
190 * @crtc: drm crtc
191 * @state: the state to destroy
192 *
193 * Destroys the crtc state (both common and Intel-specific) for the
194 * specified crtc.
195 */
196void
197intel_crtc_destroy_state(struct drm_crtc *crtc,
198 struct drm_crtc_state *state)
199{
200 drm_atomic_helper_crtc_destroy_state(crtc, state);
201}
202
203/**
204 * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
205 * @dev_priv: i915 device
206 * @intel_crtc: intel crtc
207 * @crtc_state: incoming crtc_state to validate and setup scalers
208 *
209 * This function sets up scalers based on staged scaling requests for
210 * a @crtc and its planes. It is called from crtc level check path. If request
211 * is a supportable request, it attaches scalers to requested planes and crtc.
212 *
213 * This function takes into account the current scaler(s) in use by any planes
214 * not being part of this atomic state
215 *
216 * Returns:
217 * 0 - scalers were setup succesfully
218 * error code - otherwise
219 */
220int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
221 struct intel_crtc *intel_crtc,
222 struct intel_crtc_state *crtc_state)
223{
224 struct drm_plane *plane = NULL;
225 struct intel_plane *intel_plane;
226 struct intel_plane_state *plane_state = NULL;
227 struct intel_crtc_scaler_state *scaler_state =
228 &crtc_state->scaler_state;
229 struct drm_atomic_state *drm_state = crtc_state->base.state;
230 int num_scalers_need;
231 int i, j;
232
233 num_scalers_need = hweight32(scaler_state->scaler_users);
234
235 /*
236 * High level flow:
237 * - staged scaler requests are already in scaler_state->scaler_users
238 * - check whether staged scaling requests can be supported
239 * - add planes using scalers that aren't in current transaction
240 * - assign scalers to requested users
241 * - as part of plane commit, scalers will be committed
242 * (i.e., either attached or detached) to respective planes in hw
243 * - as part of crtc_commit, scaler will be either attached or detached
244 * to crtc in hw
245 */
246
247 /* fail if required scalers > available scalers */
248 if (num_scalers_need > intel_crtc->num_scalers){
249 DRM_DEBUG_KMS("Too many scaling requests %d > %d\n",
250 num_scalers_need, intel_crtc->num_scalers);
251 return -EINVAL;
252 }
253
254 /* walkthrough scaler_users bits and start assigning scalers */
255 for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
256 int *scaler_id;
257 const char *name;
258 int idx;
259
260 /* skip if scaler not required */
261 if (!(scaler_state->scaler_users & (1 << i)))
262 continue;
263
264 if (i == SKL_CRTC_INDEX) {
265 name = "CRTC";
266 idx = intel_crtc->base.base.id;
267
268 /* panel fitter case: assign as a crtc scaler */
269 scaler_id = &scaler_state->scaler_id;
270 } else {
271 name = "PLANE";
272
273 /* plane scaler case: assign as a plane scaler */
274 /* find the plane that set the bit as scaler_user */
275 plane = drm_state->planes[i].ptr;
276
277 /*
278 * to enable/disable hq mode, add planes that are using scaler
279 * into this transaction
280 */
281 if (!plane) {
282 struct drm_plane_state *state;
283 plane = drm_plane_from_index(&dev_priv->drm, i);
284 state = drm_atomic_get_plane_state(drm_state, plane);
285 if (IS_ERR(state)) {
286 DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n",
287 plane->base.id);
288 return PTR_ERR(state);
289 }
290
291 /*
292 * the plane is added after plane checks are run,
293 * but since this plane is unchanged just do the
294 * minimum required validation.
295 */
296 crtc_state->base.planes_changed = true;
297 }
298
299 intel_plane = to_intel_plane(plane);
300 idx = plane->base.id;
301
302 /* plane on different crtc cannot be a scaler user of this crtc */
303 if (WARN_ON(intel_plane->pipe != intel_crtc->pipe)) {
304 continue;
305 }
306
307 plane_state = intel_atomic_get_existing_plane_state(drm_state,
308 intel_plane);
309 scaler_id = &plane_state->scaler_id;
310 }
311
312 if (*scaler_id < 0) {
313 /* find a free scaler */
314 for (j = 0; j < intel_crtc->num_scalers; j++) {
315 if (!scaler_state->scalers[j].in_use) {
316 scaler_state->scalers[j].in_use = 1;
317 *scaler_id = j;
318 DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n",
319 intel_crtc->pipe, *scaler_id, name, idx);
320 break;
321 }
322 }
323 }
324
325 if (WARN_ON(*scaler_id < 0)) {
326 DRM_DEBUG_KMS("Cannot find scaler for %s:%d\n", name, idx);
327 continue;
328 }
329
330 /* set scaler mode */
331 if (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) {
332 scaler_state->scalers[*scaler_id].mode = 0;
333 } else if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
334 /*
335 * when only 1 scaler is in use on either pipe A or B,
336 * scaler 0 operates in high quality (HQ) mode.
337 * In this case use scaler 0 to take advantage of HQ mode
338 */
339 *scaler_id = 0;
340 scaler_state->scalers[0].in_use = 1;
341 scaler_state->scalers[0].mode = PS_SCALER_MODE_HQ;
342 scaler_state->scalers[1].in_use = 0;
343 } else {
344 scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_DYN;
345 }
346 }
347
348 return 0;
349}
350
351struct drm_atomic_state *
352intel_atomic_state_alloc(struct drm_device *dev)
353{
354 struct intel_atomic_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
355
356 if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
357 kfree(state);
358 return NULL;
359 }
360
361 return &state->base;
362}
363
364void intel_atomic_state_clear(struct drm_atomic_state *s)
365{
366 struct intel_atomic_state *state = to_intel_atomic_state(s);
367 drm_atomic_state_default_clear(&state->base);
368 state->dpll_set = state->modeset = false;
369}