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v4.6
  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_connector_atomic_get_property - fetch connector property value
 40 * @connector: connector to fetch property for
 41 * @state: state containing the property value
 42 * @property: property to look up
 43 * @val: pointer to write property value into
 44 *
 45 * The DRM core does not store shadow copies of properties for
 46 * atomic-capable drivers.  This entrypoint is used to fetch
 47 * the current value of a driver-specific connector property.
 48 */
 49int
 50intel_connector_atomic_get_property(struct drm_connector *connector,
 51				    const struct drm_connector_state *state,
 52				    struct drm_property *property,
 53				    uint64_t *val)
 54{
 55	int i;
 
 
 
 
 
 
 
 
 
 
 
 
 56
 57	/*
 58	 * TODO: We only have atomic modeset for planes at the moment, so the
 59	 * crtc/connector code isn't quite ready yet.  Until it's ready,
 60	 * continue to look up all property values in the DRM's shadow copy
 61	 * in obj->properties->values[].
 62	 *
 63	 * When the crtc/connector state work matures, this function should
 64	 * be updated to read the values out of the state structure instead.
 65	 */
 66	for (i = 0; i < connector->base.properties->count; i++) {
 67		if (connector->base.properties->properties[i] == property) {
 68			*val = connector->base.properties->values[i];
 69			return 0;
 70		}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 71	}
 72
 
 73	return -EINVAL;
 74}
 75
 76/*
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 77 * intel_crtc_duplicate_state - duplicate crtc state
 78 * @crtc: drm crtc
 79 *
 80 * Allocates and returns a copy of the crtc state (both common and
 81 * Intel-specific) for the specified crtc.
 82 *
 83 * Returns: The newly allocated crtc state, or NULL on failure.
 84 */
 85struct drm_crtc_state *
 86intel_crtc_duplicate_state(struct drm_crtc *crtc)
 87{
 88	struct intel_crtc_state *crtc_state;
 89
 90	crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), GFP_KERNEL);
 91	if (!crtc_state)
 92		return NULL;
 93
 94	__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
 95
 96	crtc_state->update_pipe = false;
 97	crtc_state->disable_lp_wm = false;
 98	crtc_state->disable_cxsr = false;
 99	crtc_state->wm_changed = false;
 
100	crtc_state->fb_changed = false;
 
 
 
101
102	return &crtc_state->base;
103}
104
105/**
106 * intel_crtc_destroy_state - destroy crtc state
107 * @crtc: drm crtc
 
108 *
109 * Destroys the crtc state (both common and Intel-specific) for the
110 * specified crtc.
111 */
112void
113intel_crtc_destroy_state(struct drm_crtc *crtc,
114			  struct drm_crtc_state *state)
115{
116	drm_atomic_helper_crtc_destroy_state(crtc, state);
117}
118
119/**
120 * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
121 * @dev: DRM device
122 * @crtc: intel crtc
123 * @crtc_state: incoming crtc_state to validate and setup scalers
124 *
125 * This function sets up scalers based on staged scaling requests for
126 * a @crtc and its planes. It is called from crtc level check path. If request
127 * is a supportable request, it attaches scalers to requested planes and crtc.
128 *
129 * This function takes into account the current scaler(s) in use by any planes
130 * not being part of this atomic state
131 *
132 *  Returns:
133 *         0 - scalers were setup succesfully
134 *         error code - otherwise
135 */
136int intel_atomic_setup_scalers(struct drm_device *dev,
137	struct intel_crtc *intel_crtc,
138	struct intel_crtc_state *crtc_state)
139{
140	struct drm_plane *plane = NULL;
141	struct intel_plane *intel_plane;
142	struct intel_plane_state *plane_state = NULL;
143	struct intel_crtc_scaler_state *scaler_state =
144		&crtc_state->scaler_state;
145	struct drm_atomic_state *drm_state = crtc_state->base.state;
146	int num_scalers_need;
147	int i, j;
148
149	num_scalers_need = hweight32(scaler_state->scaler_users);
150
151	/*
152	 * High level flow:
153	 * - staged scaler requests are already in scaler_state->scaler_users
154	 * - check whether staged scaling requests can be supported
155	 * - add planes using scalers that aren't in current transaction
156	 * - assign scalers to requested users
157	 * - as part of plane commit, scalers will be committed
158	 *   (i.e., either attached or detached) to respective planes in hw
159	 * - as part of crtc_commit, scaler will be either attached or detached
160	 *   to crtc in hw
161	 */
162
163	/* fail if required scalers > available scalers */
164	if (num_scalers_need > intel_crtc->num_scalers){
165		DRM_DEBUG_KMS("Too many scaling requests %d > %d\n",
166			num_scalers_need, intel_crtc->num_scalers);
167		return -EINVAL;
168	}
169
170	/* walkthrough scaler_users bits and start assigning scalers */
171	for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
172		int *scaler_id;
173		const char *name;
174		int idx;
175
176		/* skip if scaler not required */
177		if (!(scaler_state->scaler_users & (1 << i)))
178			continue;
179
180		if (i == SKL_CRTC_INDEX) {
181			name = "CRTC";
182			idx = intel_crtc->base.base.id;
183
184			/* panel fitter case: assign as a crtc scaler */
185			scaler_id = &scaler_state->scaler_id;
186		} else {
187			name = "PLANE";
188
189			/* plane scaler case: assign as a plane scaler */
190			/* find the plane that set the bit as scaler_user */
191			plane = drm_state->planes[i];
192
193			/*
194			 * to enable/disable hq mode, add planes that are using scaler
195			 * into this transaction
196			 */
197			if (!plane) {
198				struct drm_plane_state *state;
199				plane = drm_plane_from_index(dev, i);
200				state = drm_atomic_get_plane_state(drm_state, plane);
201				if (IS_ERR(state)) {
202					DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n",
203						plane->base.id);
204					return PTR_ERR(state);
205				}
206
207				/*
208				 * the plane is added after plane checks are run,
209				 * but since this plane is unchanged just do the
210				 * minimum required validation.
211				 */
212				crtc_state->base.planes_changed = true;
213			}
214
215			intel_plane = to_intel_plane(plane);
216			idx = plane->base.id;
217
218			/* plane on different crtc cannot be a scaler user of this crtc */
219			if (WARN_ON(intel_plane->pipe != intel_crtc->pipe)) {
220				continue;
221			}
222
223			plane_state = to_intel_plane_state(drm_state->plane_states[i]);
 
224			scaler_id = &plane_state->scaler_id;
225		}
226
227		if (*scaler_id < 0) {
228			/* find a free scaler */
229			for (j = 0; j < intel_crtc->num_scalers; j++) {
230				if (!scaler_state->scalers[j].in_use) {
231					scaler_state->scalers[j].in_use = 1;
232					*scaler_id = j;
233					DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n",
234						intel_crtc->pipe, *scaler_id, name, idx);
235					break;
236				}
237			}
238		}
239
240		if (WARN_ON(*scaler_id < 0)) {
241			DRM_DEBUG_KMS("Cannot find scaler for %s:%d\n", name, idx);
242			continue;
243		}
244
245		/* set scaler mode */
246		if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
 
 
247			/*
248			 * when only 1 scaler is in use on either pipe A or B,
249			 * scaler 0 operates in high quality (HQ) mode.
250			 * In this case use scaler 0 to take advantage of HQ mode
251			 */
252			*scaler_id = 0;
253			scaler_state->scalers[0].in_use = 1;
254			scaler_state->scalers[0].mode = PS_SCALER_MODE_HQ;
255			scaler_state->scalers[1].in_use = 0;
256		} else {
257			scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_DYN;
258		}
259	}
260
261	return 0;
262}
263
264static void
265intel_atomic_duplicate_dpll_state(struct drm_i915_private *dev_priv,
266				  struct intel_shared_dpll_config *shared_dpll)
267{
268	enum intel_dpll_id i;
269
270	/* Copy shared dpll state */
271	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
272		struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
273
274		shared_dpll[i] = pll->config;
275	}
276}
277
278struct intel_shared_dpll_config *
279intel_atomic_get_shared_dpll_state(struct drm_atomic_state *s)
280{
281	struct intel_atomic_state *state = to_intel_atomic_state(s);
282
283	WARN_ON(!drm_modeset_is_locked(&s->dev->mode_config.connection_mutex));
284
285	if (!state->dpll_set) {
286		state->dpll_set = true;
287
288		intel_atomic_duplicate_dpll_state(to_i915(s->dev),
289						  state->shared_dpll);
290	}
291
292	return state->shared_dpll;
293}
294
295struct drm_atomic_state *
296intel_atomic_state_alloc(struct drm_device *dev)
297{
298	struct intel_atomic_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
299
300	if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
301		kfree(state);
302		return NULL;
303	}
304
305	return &state->base;
306}
307
308void intel_atomic_state_clear(struct drm_atomic_state *s)
309{
310	struct intel_atomic_state *state = to_intel_atomic_state(s);
311	drm_atomic_state_default_clear(&state->base);
312	state->dpll_set = state->modeset = false;
313}
v4.17
  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}