blob: bff917531f3322371a659ef2e975a8ff7598fa46 [file] [log] [blame]
Dave Airlief453ba02008-11-07 14:05:41 -08001/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 *
5 * DRM core CRTC related functions
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that copyright
10 * notice and this permission notice appear in supporting documentation, and
11 * that the name of the copyright holders not be used in advertising or
12 * publicity pertaining to distribution of the software without specific,
13 * written prior permission. The copyright holders make no representations
14 * about the suitability of this software for any purpose. It is provided "as
15 * is" without express or implied warranty.
16 *
17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
23 * OF THIS SOFTWARE.
24 *
25 * Authors:
26 * Keith Packard
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
30 */
31
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040032#include <linux/export.h>
Sam Ravnborg0500c042019-05-26 19:35:35 +020033#include <linux/kernel.h>
Paul Gortmaker0603ba12011-08-31 11:29:09 -040034#include <linux/moduleparam.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040035
Daniel Vetter321ebf02014-11-04 22:57:27 +010036#include <drm/drm_atomic.h>
Sam Ravnborg0500c042019-05-26 19:35:35 +020037#include <drm/drm_atomic_helper.h>
Daniel Vetter72fdb40c2018-09-05 15:57:11 +020038#include <drm/drm_atomic_uapi.h>
Boris Brezillonee68c742019-08-26 17:26:29 +020039#include <drm/drm_bridge.h>
David Howells760285e2012-10-02 18:01:07 +010040#include <drm/drm_crtc.h>
David Howells760285e2012-10-02 18:01:07 +010041#include <drm/drm_crtc_helper.h>
Sam Ravnborg0500c042019-05-26 19:35:35 +020042#include <drm/drm_drv.h>
David Howells760285e2012-10-02 18:01:07 +010043#include <drm/drm_edid.h>
Sam Ravnborg0500c042019-05-26 19:35:35 +020044#include <drm/drm_encoder.h>
45#include <drm/drm_fb_helper.h>
46#include <drm/drm_fourcc.h>
47#include <drm/drm_plane_helper.h>
48#include <drm/drm_print.h>
49#include <drm/drm_vblank.h>
Dave Airlief453ba02008-11-07 14:05:41 -080050
Benjamin Gaignard8dc056e2019-11-19 13:58:05 +010051#include "drm_crtc_helper_internal.h"
52
Daniel Vetter3150c7d2014-11-06 20:53:29 +010053/**
54 * DOC: overview
55 *
56 * The CRTC modeset helper library provides a default set_config implementation
57 * in drm_crtc_helper_set_config(). Plus a few other convenience functions using
58 * the same callbacks which drivers can use to e.g. restore the modeset
59 * configuration on resume with drm_helper_resume_force_mode().
60 *
Daniel Vetter2be94972015-12-04 09:45:46 +010061 * Note that this helper library doesn't track the current power state of CRTCs
Daniel Vetter6806cdf2017-01-25 07:26:43 +010062 * and encoders. It can call callbacks like &drm_encoder_helper_funcs.dpms even
63 * though the hardware is already in the desired state. This deficiency has been
64 * fixed in the atomic helpers.
Daniel Vetter2be94972015-12-04 09:45:46 +010065 *
Daniel Vetter3150c7d2014-11-06 20:53:29 +010066 * The driver callbacks are mostly compatible with the atomic modeset helpers,
67 * except for the handling of the primary plane: Atomic helpers require that the
68 * primary plane is implemented as a real standalone plane and not directly tied
69 * to the CRTC state. For easier transition this library provides functions to
70 * implement the old semantics required by the CRTC helpers using the new plane
71 * and atomic helper callbacks.
72 *
73 * Drivers are strongly urged to convert to the atomic helpers (by way of first
74 * converting to the plane helpers). New drivers must not use these functions
75 * but need to implement the atomic interface instead, potentially using the
76 * atomic helpers for that.
Daniel Vetter092d01d2015-12-04 09:45:44 +010077 *
78 * These legacy modeset helpers use the same function table structures as
79 * all other modesetting helpers. See the documentation for struct
Daniel Vetterea0dd852016-12-29 21:48:26 +010080 * &drm_crtc_helper_funcs, &struct drm_encoder_helper_funcs and struct
Daniel Vetter092d01d2015-12-04 09:45:44 +010081 * &drm_connector_helper_funcs.
Daniel Vetter3150c7d2014-11-06 20:53:29 +010082 */
Daniel Vetter92b6f892013-10-08 17:44:47 +020083
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +010084/**
Keith Packardc9fb15f2009-05-30 20:42:28 -070085 * drm_helper_encoder_in_use - check if a given encoder is in use
86 * @encoder: encoder to check
87 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +010088 * Checks whether @encoder is with the current mode setting output configuration
89 * in use by any connector. This doesn't mean that it is actually enabled since
90 * the DPMS state is tracked separately.
Keith Packardc9fb15f2009-05-30 20:42:28 -070091 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +010092 * Returns:
93 * True if @encoder is used, false otherwise.
Keith Packardc9fb15f2009-05-30 20:42:28 -070094 */
95bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
96{
97 struct drm_connector *connector;
Daniel Vetterc36a3252016-12-15 16:58:43 +010098 struct drm_connector_list_iter conn_iter;
Keith Packardc9fb15f2009-05-30 20:42:28 -070099 struct drm_device *dev = encoder->dev;
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100100
Daniel Vetter2b5ab0e2019-01-10 11:30:45 +0100101 WARN_ON(drm_drv_uses_atomic_modeset(dev));
102
Sergei Antonovba6f5822014-05-12 00:30:48 +0200103 /*
104 * We can expect this mutex to be locked if we are not panicking.
105 * Locking is currently fubar in the panic handler.
106 */
Dave Airlie8d4ad9d2014-06-05 20:28:59 +1000107 if (!oops_in_progress) {
Sergei Antonovba6f5822014-05-12 00:30:48 +0200108 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
Dave Airlie8d4ad9d2014-06-05 20:28:59 +1000109 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
110 }
Sergei Antonovba6f5822014-05-12 00:30:48 +0200111
Daniel Vetterc36a3252016-12-15 16:58:43 +0100112
Thierry Redingb982dab2017-02-28 15:46:43 +0100113 drm_connector_list_iter_begin(dev, &conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100114 drm_for_each_connector_iter(connector, &conn_iter) {
115 if (connector->encoder == encoder) {
Thierry Redingb982dab2017-02-28 15:46:43 +0100116 drm_connector_list_iter_end(&conn_iter);
Keith Packardc9fb15f2009-05-30 20:42:28 -0700117 return true;
Daniel Vetterc36a3252016-12-15 16:58:43 +0100118 }
119 }
Thierry Redingb982dab2017-02-28 15:46:43 +0100120 drm_connector_list_iter_end(&conn_iter);
Keith Packardc9fb15f2009-05-30 20:42:28 -0700121 return false;
122}
123EXPORT_SYMBOL(drm_helper_encoder_in_use);
124
125/**
Dave Airlief453ba02008-11-07 14:05:41 -0800126 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
127 * @crtc: CRTC to check
128 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100129 * Checks whether @crtc is with the current mode setting output configuration
130 * in use by any connector. This doesn't mean that it is actually enabled since
131 * the DPMS state is tracked separately.
Dave Airlief453ba02008-11-07 14:05:41 -0800132 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100133 * Returns:
134 * True if @crtc is used, false otherwise.
Dave Airlief453ba02008-11-07 14:05:41 -0800135 */
136bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
137{
138 struct drm_encoder *encoder;
139 struct drm_device *dev = crtc->dev;
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100140
Daniel Vetter2b5ab0e2019-01-10 11:30:45 +0100141 WARN_ON(drm_drv_uses_atomic_modeset(dev));
142
Sergei Antonovba6f5822014-05-12 00:30:48 +0200143 /*
144 * We can expect this mutex to be locked if we are not panicking.
145 * Locking is currently fubar in the panic handler.
146 */
147 if (!oops_in_progress)
148 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
149
Daniel Vettere4f62542015-07-09 23:44:35 +0200150 drm_for_each_encoder(encoder, dev)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700151 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
Dave Airlief453ba02008-11-07 14:05:41 -0800152 return true;
153 return false;
154}
155EXPORT_SYMBOL(drm_helper_crtc_in_use);
156
Ben Skeggs86a1b9d12010-07-01 16:49:57 +1000157static void
158drm_encoder_disable(struct drm_encoder *encoder)
159{
Jani Nikulabe26a662015-03-11 11:51:06 +0200160 const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
Ben Skeggs86a1b9d12010-07-01 16:49:57 +1000161
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200162 if (!encoder_funcs)
163 return;
164
Ben Skeggs86a1b9d12010-07-01 16:49:57 +1000165 if (encoder_funcs->disable)
166 (*encoder_funcs->disable)(encoder);
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200167 else if (encoder_funcs->dpms)
Ben Skeggs86a1b9d12010-07-01 16:49:57 +1000168 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
169}
170
Daniel Vetterb182cc52014-03-20 14:26:34 +0100171static void __drm_helper_disable_unused_functions(struct drm_device *dev)
Dave Airlief453ba02008-11-07 14:05:41 -0800172{
173 struct drm_encoder *encoder;
Dave Airlief453ba02008-11-07 14:05:41 -0800174 struct drm_crtc *crtc;
175
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100176 drm_warn_on_modeset_not_all_locked(dev);
177
Daniel Vetter6295d602015-07-09 23:44:25 +0200178 drm_for_each_encoder(encoder, dev) {
Dave Airlie929710212010-12-21 12:47:56 +1000179 if (!drm_helper_encoder_in_use(encoder)) {
Ben Skeggs86a1b9d12010-07-01 16:49:57 +1000180 drm_encoder_disable(encoder);
Rob Clarkb5e6c1d2014-05-24 14:30:10 -0400181 /* disconnect encoder from any connector */
Dave Airlie9c552dd2009-09-02 14:00:11 +1000182 encoder->crtc = NULL;
Dave Airliea3a05442009-08-31 15:16:30 +1000183 }
Dave Airlief453ba02008-11-07 14:05:41 -0800184 }
185
Daniel Vetter6295d602015-07-09 23:44:25 +0200186 drm_for_each_crtc(crtc, dev) {
Jani Nikulabe26a662015-03-11 11:51:06 +0200187 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
Suraj Upadhyay948de8422020-07-02 18:53:32 +0530188
Dave Airlief453ba02008-11-07 14:05:41 -0800189 crtc->enabled = drm_helper_crtc_in_use(crtc);
190 if (!crtc->enabled) {
Alex Deucher5c8d7172010-06-11 17:04:35 -0400191 if (crtc_funcs->disable)
192 (*crtc_funcs->disable)(crtc);
193 else
194 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
Matt Roperf4510a22014-04-01 15:22:40 -0700195 crtc->primary->fb = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800196 }
197 }
198}
Daniel Vetterb182cc52014-03-20 14:26:34 +0100199
200/**
201 * drm_helper_disable_unused_functions - disable unused objects
202 * @dev: DRM device
203 *
204 * This function walks through the entire mode setting configuration of @dev. It
Daniel Vetter2be94972015-12-04 09:45:46 +0100205 * will remove any CRTC links of unused encoders and encoder links of
206 * disconnected connectors. Then it will disable all unused encoders and CRTCs
Daniel Vetterb182cc52014-03-20 14:26:34 +0100207 * either by calling their disable callback if available or by calling their
208 * dpms callback with DRM_MODE_DPMS_OFF.
Daniel Vetter09859d22016-01-13 15:31:16 +0100209 *
210 * NOTE:
211 *
212 * This function is part of the legacy modeset helper library and will cause
213 * major confusion with atomic drivers. This is because atomic helpers guarantee
214 * to never call ->disable() hooks on a disabled function, or ->enable() hooks
215 * on an enabled functions. drm_helper_disable_unused_functions() on the other
216 * hand throws such guarantees into the wind and calls disable hooks
217 * unconditionally on unused functions.
Daniel Vetterb182cc52014-03-20 14:26:34 +0100218 */
219void drm_helper_disable_unused_functions(struct drm_device *dev)
220{
Daniel Vetter2b5ab0e2019-01-10 11:30:45 +0100221 WARN_ON(drm_drv_uses_atomic_modeset(dev));
Daniel Vetter6605ca02016-06-08 14:19:18 +0200222
Daniel Vetterb182cc52014-03-20 14:26:34 +0100223 drm_modeset_lock_all(dev);
224 __drm_helper_disable_unused_functions(dev);
225 drm_modeset_unlock_all(dev);
226}
Dave Airlief453ba02008-11-07 14:05:41 -0800227EXPORT_SYMBOL(drm_helper_disable_unused_functions);
228
Jesse Barnes7bec7562009-02-23 16:09:34 -0800229/*
230 * Check the CRTC we're going to map each output to vs. its current
231 * CRTC. If they don't match, we have to disable the output and the CRTC
232 * since the driver will have to re-route things.
233 */
234static void
235drm_crtc_prepare_encoders(struct drm_device *dev)
236{
Jani Nikulabe26a662015-03-11 11:51:06 +0200237 const struct drm_encoder_helper_funcs *encoder_funcs;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800238 struct drm_encoder *encoder;
239
Daniel Vetter6295d602015-07-09 23:44:25 +0200240 drm_for_each_encoder(encoder, dev) {
Jesse Barnes7bec7562009-02-23 16:09:34 -0800241 encoder_funcs = encoder->helper_private;
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200242 if (!encoder_funcs)
243 continue;
244
Jesse Barnes7bec7562009-02-23 16:09:34 -0800245 /* Disable unused encoders */
246 if (encoder->crtc == NULL)
Ben Skeggs86a1b9d12010-07-01 16:49:57 +1000247 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800248 }
249}
250
Dave Airlief453ba02008-11-07 14:05:41 -0800251/**
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100252 * drm_crtc_helper_set_mode - internal helper to set a mode
Dave Airlief453ba02008-11-07 14:05:41 -0800253 * @crtc: CRTC to program
254 * @mode: mode to use
Alex Deucher4c9287c2012-11-09 17:26:32 +0000255 * @x: horizontal offset into the surface
256 * @y: vertical offset into the surface
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100257 * @old_fb: old framebuffer, for cleanup
Dave Airlief453ba02008-11-07 14:05:41 -0800258 *
Dave Airlief453ba02008-11-07 14:05:41 -0800259 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100260 * to fixup or reject the mode prior to trying to set it. This is an internal
261 * helper that drivers could e.g. use to update properties that require the
262 * entire output pipe to be disabled and re-enabled in a new configuration. For
263 * example for changing whether audio is enabled on a hdmi link or for changing
264 * panel fitter or dither attributes. It is also called by the
265 * drm_crtc_helper_set_config() helper function to drive the mode setting
266 * sequence.
Dave Airlief453ba02008-11-07 14:05:41 -0800267 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100268 * Returns:
269 * True if the mode was set successfully, false otherwise.
Dave Airlief453ba02008-11-07 14:05:41 -0800270 */
271bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
272 struct drm_display_mode *mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500273 int x, int y,
274 struct drm_framebuffer *old_fb)
Dave Airlief453ba02008-11-07 14:05:41 -0800275{
276 struct drm_device *dev = crtc->dev;
Daniel Stone5a275282015-03-19 04:33:03 +0000277 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
Jani Nikulabe26a662015-03-11 11:51:06 +0200278 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
279 const struct drm_encoder_helper_funcs *encoder_funcs;
Dave Airlief453ba02008-11-07 14:05:41 -0800280 int saved_x, saved_y;
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400281 bool saved_enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800282 struct drm_encoder *encoder;
283 bool ret = true;
284
Daniel Vetter2b5ab0e2019-01-10 11:30:45 +0100285 WARN_ON(drm_drv_uses_atomic_modeset(dev));
286
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100287 drm_warn_on_modeset_not_all_locked(dev);
288
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400289 saved_enabled = crtc->enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800290 crtc->enabled = drm_helper_crtc_in_use(crtc);
Dave Airlief453ba02008-11-07 14:05:41 -0800291 if (!crtc->enabled)
292 return true;
293
Chris Wilson021a8452011-01-28 11:31:56 +0000294 adjusted_mode = drm_mode_duplicate(dev, mode);
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400295 if (!adjusted_mode) {
296 crtc->enabled = saved_enabled;
Ville Syrjälä6bfc56a2012-03-13 12:35:48 +0200297 return false;
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400298 }
Chris Wilson021a8452011-01-28 11:31:56 +0000299
Dave Airlief453ba02008-11-07 14:05:41 -0800300 saved_mode = crtc->mode;
Daniel Stone5a275282015-03-19 04:33:03 +0000301 saved_hwmode = crtc->hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800302 saved_x = crtc->x;
303 saved_y = crtc->y;
304
305 /* Update crtc values up front so the driver can rely on them for mode
306 * setting.
307 */
308 crtc->mode = *mode;
309 crtc->x = x;
310 crtc->y = y;
311
Dave Airlief453ba02008-11-07 14:05:41 -0800312 /* Pass our mode to the connectors and the CRTC to give them a chance to
313 * adjust it according to limitations or connector properties, and also
314 * a chance to reject the mode entirely.
315 */
Daniel Vetter6295d602015-07-09 23:44:25 +0200316 drm_for_each_encoder(encoder, dev) {
Dave Airlief453ba02008-11-07 14:05:41 -0800317
318 if (encoder->crtc != crtc)
319 continue;
Sean Paul3b336ec2013-08-14 16:47:37 -0400320
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200321 encoder_funcs = encoder->helper_private;
322 if (!encoder_funcs)
323 continue;
324
Dave Airlief453ba02008-11-07 14:05:41 -0800325 encoder_funcs = encoder->helper_private;
Carlos Palminha3c5b2672016-02-10 12:15:22 +0000326 if (encoder_funcs->mode_fixup) {
327 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
328 adjusted_mode))) {
329 DRM_DEBUG_KMS("Encoder fixup failed\n");
330 goto done;
331 }
Dave Airlief453ba02008-11-07 14:05:41 -0800332 }
333 }
334
Carlos Palminha49f718c2016-02-16 14:10:03 +0000335 if (crtc_funcs->mode_fixup) {
336 if (!(ret = crtc_funcs->mode_fixup(crtc, mode,
337 adjusted_mode))) {
338 DRM_DEBUG_KMS("CRTC fixup failed\n");
339 goto done;
340 }
Dave Airlief453ba02008-11-07 14:05:41 -0800341 }
Ville Syrjäläfa3ab4c2015-12-08 18:41:53 +0200342 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
Dave Airlief453ba02008-11-07 14:05:41 -0800343
Daniel Stone5a275282015-03-19 04:33:03 +0000344 crtc->hwmode = *adjusted_mode;
345
Dave Airlief453ba02008-11-07 14:05:41 -0800346 /* Prepare the encoders and CRTCs before setting the mode. */
Daniel Vetter6295d602015-07-09 23:44:25 +0200347 drm_for_each_encoder(encoder, dev) {
Dave Airlief453ba02008-11-07 14:05:41 -0800348
349 if (encoder->crtc != crtc)
350 continue;
Sean Paul3b336ec2013-08-14 16:47:37 -0400351
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200352 encoder_funcs = encoder->helper_private;
353 if (!encoder_funcs)
354 continue;
355
Dave Airlief453ba02008-11-07 14:05:41 -0800356 /* Disable the encoders as the first thing we do. */
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200357 if (encoder_funcs->prepare)
358 encoder_funcs->prepare(encoder);
Dave Airlief453ba02008-11-07 14:05:41 -0800359 }
360
Jesse Barnes7bec7562009-02-23 16:09:34 -0800361 drm_crtc_prepare_encoders(dev);
362
Dave Airlief453ba02008-11-07 14:05:41 -0800363 crtc_funcs->prepare(crtc);
364
365 /* Set up the DPLL and any encoders state that needs to adjust or depend
366 * on the DPLL.
367 */
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000368 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
369 if (!ret)
370 goto done;
Dave Airlief453ba02008-11-07 14:05:41 -0800371
Daniel Vetter6295d602015-07-09 23:44:25 +0200372 drm_for_each_encoder(encoder, dev) {
Dave Airlief453ba02008-11-07 14:05:41 -0800373
374 if (encoder->crtc != crtc)
375 continue;
376
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200377 encoder_funcs = encoder->helper_private;
378 if (!encoder_funcs)
379 continue;
380
Shayenne Moura0e691bc2019-01-11 12:45:48 -0200381 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%s]\n",
382 encoder->base.id, encoder->name, mode->name);
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200383 if (encoder_funcs->mode_set)
384 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
Dave Airlief453ba02008-11-07 14:05:41 -0800385 }
386
387 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
388 crtc_funcs->commit(crtc);
389
Daniel Vetter6295d602015-07-09 23:44:25 +0200390 drm_for_each_encoder(encoder, dev) {
Dave Airlief453ba02008-11-07 14:05:41 -0800391
392 if (encoder->crtc != crtc)
393 continue;
394
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200395 encoder_funcs = encoder->helper_private;
396 if (!encoder_funcs)
397 continue;
398
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200399 if (encoder_funcs->commit)
400 encoder_funcs->commit(encoder);
Dave Airlief453ba02008-11-07 14:05:41 -0800401 }
402
Mario Kleiner27641c3f2010-10-23 04:20:23 +0200403 /* Calculate and store various constants which
404 * are later needed by vblank and swap-completion
405 * timestamping. They are derived from true hwmode.
406 */
Ville Syrjälä545cdd52013-10-26 17:16:30 +0300407 drm_calc_timestamping_constants(crtc, &crtc->hwmode);
Mario Kleiner27641c3f2010-10-23 04:20:23 +0200408
Dave Airlief453ba02008-11-07 14:05:41 -0800409 /* FIXME: add subpixel order */
410done:
Chris Wilson021a8452011-01-28 11:31:56 +0000411 drm_mode_destroy(dev, adjusted_mode);
Dave Airlief453ba02008-11-07 14:05:41 -0800412 if (!ret) {
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400413 crtc->enabled = saved_enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800414 crtc->mode = saved_mode;
Daniel Stone5a275282015-03-19 04:33:03 +0000415 crtc->hwmode = saved_hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800416 crtc->x = saved_x;
417 crtc->y = saved_y;
418 }
419
420 return ret;
421}
422EXPORT_SYMBOL(drm_crtc_helper_set_mode);
423
Thierry Redinga74591d2014-04-29 11:44:39 +0200424static void
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000425drm_crtc_helper_disable(struct drm_crtc *crtc)
426{
427 struct drm_device *dev = crtc->dev;
428 struct drm_connector *connector;
429 struct drm_encoder *encoder;
430
431 /* Decouple all encoders and their attached connectors from this crtc */
Daniel Vetter6295d602015-07-09 23:44:25 +0200432 drm_for_each_encoder(encoder, dev) {
Daniel Vetterc36a3252016-12-15 16:58:43 +0100433 struct drm_connector_list_iter conn_iter;
434
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000435 if (encoder->crtc != crtc)
436 continue;
437
Thierry Redingb982dab2017-02-28 15:46:43 +0100438 drm_connector_list_iter_begin(dev, &conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100439 drm_for_each_connector_iter(connector, &conn_iter) {
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000440 if (connector->encoder != encoder)
441 continue;
442
443 connector->encoder = NULL;
Thierry Redinga6ad6232013-10-02 15:50:06 +0200444
445 /*
446 * drm_helper_disable_unused_functions() ought to be
447 * doing this, but since we've decoupled the encoder
448 * from the connector above, the required connection
449 * between them is henceforth no longer available.
450 */
451 connector->dpms = DRM_MODE_DPMS_OFF;
Dave Airlie0955c122016-04-27 11:27:54 +1000452
453 /* we keep a reference while the encoder is bound */
Thierry Redingad093602017-02-28 15:46:39 +0100454 drm_connector_put(connector);
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000455 }
Thierry Redingb982dab2017-02-28 15:46:43 +0100456 drm_connector_list_iter_end(&conn_iter);
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000457 }
458
Daniel Vetterb182cc52014-03-20 14:26:34 +0100459 __drm_helper_disable_unused_functions(dev);
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000460}
461
José Roberto de Souzaa92462d2019-09-13 16:28:56 -0700462/*
463 * For connectors that support multiple encoders, either the
464 * .atomic_best_encoder() or .best_encoder() operation must be implemented.
465 */
466struct drm_encoder *
467drm_connector_get_single_encoder(struct drm_connector *connector)
468{
José Roberto de Souza62afb4a2019-09-13 16:28:57 -0700469 struct drm_encoder *encoder;
470
471 WARN_ON(hweight32(connector->possible_encoders) > 1);
472 drm_connector_for_each_possible_encoder(connector, encoder)
473 return encoder;
474
475 return NULL;
José Roberto de Souzaa92462d2019-09-13 16:28:56 -0700476}
477
Dave Airlief453ba02008-11-07 14:05:41 -0800478/**
479 * drm_crtc_helper_set_config - set a new config from userspace
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100480 * @set: mode set configuration
Daniel Vettera4eff9a2017-03-22 22:50:57 +0100481 * @ctx: lock acquire context, not used here
Dave Airlief453ba02008-11-07 14:05:41 -0800482 *
Daniel Vetter6806cdf2017-01-25 07:26:43 +0100483 * The drm_crtc_helper_set_config() helper function implements the of
484 * &drm_crtc_funcs.set_config callback for drivers using the legacy CRTC
485 * helpers.
Daniel Vetter2be94972015-12-04 09:45:46 +0100486 *
487 * It first tries to locate the best encoder for each connector by calling the
Daniel Vetter6806cdf2017-01-25 07:26:43 +0100488 * connector @drm_connector_helper_funcs.best_encoder helper operation.
Daniel Vetter2be94972015-12-04 09:45:46 +0100489 *
490 * After locating the appropriate encoders, the helper function will call the
491 * mode_fixup encoder and CRTC helper operations to adjust the requested mode,
492 * or reject it completely in which case an error will be returned to the
493 * application. If the new configuration after mode adjustment is identical to
494 * the current configuration the helper function will return without performing
495 * any other operation.
496 *
497 * If the adjusted mode is identical to the current mode but changes to the
498 * frame buffer need to be applied, the drm_crtc_helper_set_config() function
Daniel Vetter6806cdf2017-01-25 07:26:43 +0100499 * will call the CRTC &drm_crtc_helper_funcs.mode_set_base helper operation.
Daniel Vetter2be94972015-12-04 09:45:46 +0100500 *
501 * If the adjusted mode differs from the current mode, or if the
502 * ->mode_set_base() helper operation is not provided, the helper function
503 * performs a full mode set sequence by calling the ->prepare(), ->mode_set()
504 * and ->commit() CRTC and encoder helper operations, in that order.
505 * Alternatively it can also use the dpms and disable helper operations. For
Daniel Vetterea0dd852016-12-29 21:48:26 +0100506 * details see &struct drm_crtc_helper_funcs and struct
Daniel Vetter2be94972015-12-04 09:45:46 +0100507 * &drm_encoder_helper_funcs.
508 *
509 * This function is deprecated. New drivers must implement atomic modeset
510 * support, for which this function is unsuitable. Instead drivers should use
511 * drm_atomic_helper_set_config().
Dave Airlief453ba02008-11-07 14:05:41 -0800512 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100513 * Returns:
514 * Returns 0 on success, negative errno numbers on failure.
Dave Airlief453ba02008-11-07 14:05:41 -0800515 */
Daniel Vettera4eff9a2017-03-22 22:50:57 +0100516int drm_crtc_helper_set_config(struct drm_mode_set *set,
517 struct drm_modeset_acquire_ctx *ctx)
Dave Airlief453ba02008-11-07 14:05:41 -0800518{
519 struct drm_device *dev;
Philipp Zabel93f55972016-06-02 19:27:52 +0200520 struct drm_crtc **save_encoder_crtcs, *new_crtc;
521 struct drm_encoder **save_connector_encoders, *new_encoder, *encoder;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100522 bool mode_changed = false; /* if true do a full mode set */
523 bool fb_changed = false; /* if true and !mode_changed just do a flip */
Philipp Zabel93f55972016-06-02 19:27:52 +0200524 struct drm_connector *connector;
Daniel Vetterc36a3252016-12-15 16:58:43 +0100525 struct drm_connector_list_iter conn_iter;
Dave Airlief453ba02008-11-07 14:05:41 -0800526 int count = 0, ro, fail = 0;
Jani Nikulabe26a662015-03-11 11:51:06 +0200527 const struct drm_crtc_helper_funcs *crtc_funcs;
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800528 struct drm_mode_set save_set;
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200529 int ret;
Keith Packardbf9dc102010-11-26 10:45:58 -0800530 int i;
Dave Airlief453ba02008-11-07 14:05:41 -0800531
Zhao Yakui58367ed2009-07-20 13:48:07 +0800532 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800533
Daniel Vettere58de882013-06-15 00:13:11 +0200534 BUG_ON(!set);
535 BUG_ON(!set->crtc);
536 BUG_ON(!set->crtc->helper_private);
Dave Airlief453ba02008-11-07 14:05:41 -0800537
Daniel Vettere58de882013-06-15 00:13:11 +0200538 /* Enforce sane interface api - has been abused by the fb helper. */
539 BUG_ON(!set->mode && set->fb);
540 BUG_ON(set->fb && set->num_connectors == 0);
Dave Airlief453ba02008-11-07 14:05:41 -0800541
542 crtc_funcs = set->crtc->helper_private;
543
Daniel Vetter2b5ab0e2019-01-10 11:30:45 +0100544 dev = set->crtc->dev;
545 WARN_ON(drm_drv_uses_atomic_modeset(dev));
546
Chris Wilsonede3ff52011-01-31 11:16:33 +0000547 if (!set->mode)
548 set->fb = NULL;
549
Jerome Glisse94401062010-07-15 15:43:25 -0400550 if (set->fb) {
Ville Syrjäläfa3ab4c2015-12-08 18:41:53 +0200551 DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n",
552 set->crtc->base.id, set->crtc->name,
553 set->fb->base.id,
554 (int)set->num_connectors, set->x, set->y);
Jerome Glisse94401062010-07-15 15:43:25 -0400555 } else {
Ville Syrjäläfa3ab4c2015-12-08 18:41:53 +0200556 DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n",
557 set->crtc->base.id, set->crtc->name);
Thierry Redinga74591d2014-04-29 11:44:39 +0200558 drm_crtc_helper_disable(set->crtc);
559 return 0;
Jerome Glisse94401062010-07-15 15:43:25 -0400560 }
Dave Airlief453ba02008-11-07 14:05:41 -0800561
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100562 drm_warn_on_modeset_not_all_locked(dev);
563
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400564 /*
565 * Allocate space for the backup of all (non-pointer) encoder and
566 * connector data.
567 */
Harsha Sharma4b947b1c2017-10-13 13:07:47 +0530568 save_encoder_crtcs = kcalloc(dev->mode_config.num_encoder,
Philipp Zabel93f55972016-06-02 19:27:52 +0200569 sizeof(struct drm_crtc *), GFP_KERNEL);
570 if (!save_encoder_crtcs)
Dave Airlief453ba02008-11-07 14:05:41 -0800571 return -ENOMEM;
Dave Airlief453ba02008-11-07 14:05:41 -0800572
Harsha Sharma4b947b1c2017-10-13 13:07:47 +0530573 save_connector_encoders = kcalloc(dev->mode_config.num_connector,
Philipp Zabel93f55972016-06-02 19:27:52 +0200574 sizeof(struct drm_encoder *), GFP_KERNEL);
575 if (!save_connector_encoders) {
576 kfree(save_encoder_crtcs);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200577 return -ENOMEM;
578 }
579
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400580 /*
581 * Copy data. Note that driver private data is not affected.
Maarten Maathuise67aae72009-08-27 10:18:29 +0200582 * Should anything bad happen only the expected state is
583 * restored, not the drivers personal bookkeeping.
584 */
585 count = 0;
Daniel Vetter6295d602015-07-09 23:44:25 +0200586 drm_for_each_encoder(encoder, dev) {
Philipp Zabel93f55972016-06-02 19:27:52 +0200587 save_encoder_crtcs[count++] = encoder->crtc;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200588 }
589
590 count = 0;
Thierry Redingb982dab2017-02-28 15:46:43 +0100591 drm_connector_list_iter_begin(dev, &conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100592 drm_for_each_connector_iter(connector, &conn_iter)
Philipp Zabel93f55972016-06-02 19:27:52 +0200593 save_connector_encoders[count++] = connector->encoder;
Thierry Redingb982dab2017-02-28 15:46:43 +0100594 drm_connector_list_iter_end(&conn_iter);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200595
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800596 save_set.crtc = set->crtc;
597 save_set.mode = &set->crtc->mode;
598 save_set.x = set->crtc->x;
599 save_set.y = set->crtc->y;
Matt Roperf4510a22014-04-01 15:22:40 -0700600 save_set.fb = set->crtc->primary->fb;
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800601
Dave Airlief453ba02008-11-07 14:05:41 -0800602 /* We should be able to check here if the fb has the same properties
603 * and then just flip_or_move it */
Matt Roperf4510a22014-04-01 15:22:40 -0700604 if (set->crtc->primary->fb != set->fb) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800605 /* If we have no fb then treat it as a full mode set */
Matt Roperf4510a22014-04-01 15:22:40 -0700606 if (set->crtc->primary->fb == NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800607 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800608 mode_changed = true;
Ville Syrjälädbd4d572016-11-18 21:53:10 +0200609 } else if (set->fb->format != set->crtc->primary->fb->format) {
Laurent Pinchartce83adf2013-04-22 01:38:47 +0200610 mode_changed = true;
Dave Airlie8dff4742010-02-11 14:28:58 +1000611 } else
Jesse Barnes712531b2009-01-09 13:56:14 -0800612 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800613 }
614
615 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800616 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800617
Liu Ying2deafc72016-01-14 14:00:10 +0800618 if (!drm_mode_equal(set->mode, &set->crtc->mode)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800619 DRM_DEBUG_KMS("modes are different, full mode set\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800620 drm_mode_debug_printmodeline(&set->crtc->mode);
621 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800622 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800623 }
624
Philipp Zabelfffc5f52016-06-02 19:27:51 +0200625 /* take a reference on all unbound connectors in set, reuse the
626 * already taken reference for bound connectors
627 */
Dave Airlie0955c122016-04-27 11:27:54 +1000628 for (ro = 0; ro < set->num_connectors; ro++) {
Philipp Zabelfffc5f52016-06-02 19:27:51 +0200629 if (set->connectors[ro]->encoder)
630 continue;
Thierry Redingad093602017-02-28 15:46:39 +0100631 drm_connector_get(set->connectors[ro]);
Dave Airlie0955c122016-04-27 11:27:54 +1000632 }
633
Dave Airlief453ba02008-11-07 14:05:41 -0800634 /* a) traverse passed in connector list and get encoders for them */
635 count = 0;
Thierry Redingb982dab2017-02-28 15:46:43 +0100636 drm_connector_list_iter_begin(dev, &conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100637 drm_for_each_connector_iter(connector, &conn_iter) {
Jani Nikulabe26a662015-03-11 11:51:06 +0200638 const struct drm_connector_helper_funcs *connector_funcs =
Dave Airlief453ba02008-11-07 14:05:41 -0800639 connector->helper_private;
Dave Airlief453ba02008-11-07 14:05:41 -0800640 new_encoder = connector->encoder;
641 for (ro = 0; ro < set->num_connectors; ro++) {
642 if (set->connectors[ro] == connector) {
José Roberto de Souzaa92462d2019-09-13 16:28:56 -0700643 if (connector_funcs->best_encoder)
644 new_encoder = connector_funcs->best_encoder(connector);
645 else
646 new_encoder = drm_connector_get_single_encoder(connector);
647
Dave Airlief453ba02008-11-07 14:05:41 -0800648 /* if we can't get an encoder for a connector
649 we are setting now - then fail */
650 if (new_encoder == NULL)
651 /* don't break so fail path works correct */
652 fail = 1;
Daniel Vetter25f397a2013-07-19 18:57:11 +0200653
654 if (connector->dpms != DRM_MODE_DPMS_ON) {
655 DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
656 mode_changed = true;
657 }
Daniel Vetter177cf922014-04-01 22:14:59 +0200658
659 break;
Dave Airlief453ba02008-11-07 14:05:41 -0800660 }
661 }
662
663 if (new_encoder != connector->encoder) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800664 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800665 mode_changed = true;
Maarten Maathuisff846ab2009-08-19 00:56:45 +0200666 /* If the encoder is reused for another connector, then
667 * the appropriate crtc will be set later.
668 */
Maarten Maathuisff6fdbe2009-09-01 03:39:04 +0200669 if (connector->encoder)
670 connector->encoder->crtc = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800671 connector->encoder = new_encoder;
672 }
673 }
Thierry Redingb982dab2017-02-28 15:46:43 +0100674 drm_connector_list_iter_end(&conn_iter);
Dave Airlief453ba02008-11-07 14:05:41 -0800675
676 if (fail) {
677 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200678 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800679 }
680
681 count = 0;
Thierry Redingb982dab2017-02-28 15:46:43 +0100682 drm_connector_list_iter_begin(dev, &conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100683 drm_for_each_connector_iter(connector, &conn_iter) {
Dave Airlief453ba02008-11-07 14:05:41 -0800684 if (!connector->encoder)
685 continue;
686
Dave Airlief453ba02008-11-07 14:05:41 -0800687 if (connector->encoder->crtc == set->crtc)
688 new_crtc = NULL;
689 else
690 new_crtc = connector->encoder->crtc;
691
692 for (ro = 0; ro < set->num_connectors; ro++) {
693 if (set->connectors[ro] == connector)
694 new_crtc = set->crtc;
695 }
Jesse Barnes7bec7562009-02-23 16:09:34 -0800696
697 /* Make sure the new CRTC will work with the encoder */
698 if (new_crtc &&
699 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
700 ret = -EINVAL;
Thierry Redingb982dab2017-02-28 15:46:43 +0100701 drm_connector_list_iter_end(&conn_iter);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200702 goto fail;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800703 }
Dave Airlief453ba02008-11-07 14:05:41 -0800704 if (new_crtc != connector->encoder->crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800705 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800706 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800707 connector->encoder->crtc = new_crtc;
708 }
Jerome Glisse94401062010-07-15 15:43:25 -0400709 if (new_crtc) {
Ville Syrjäläfa3ab4c2015-12-08 18:41:53 +0200710 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n",
711 connector->base.id, connector->name,
712 new_crtc->base.id, new_crtc->name);
Jerome Glisse94401062010-07-15 15:43:25 -0400713 } else {
714 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
Ville Syrjäläfa3ab4c2015-12-08 18:41:53 +0200715 connector->base.id, connector->name);
Jerome Glisse94401062010-07-15 15:43:25 -0400716 }
Dave Airlief453ba02008-11-07 14:05:41 -0800717 }
Thierry Redingb982dab2017-02-28 15:46:43 +0100718 drm_connector_list_iter_end(&conn_iter);
Dave Airlief453ba02008-11-07 14:05:41 -0800719
720 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800721 if (fb_changed && !crtc_funcs->mode_set_base)
722 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800723
Jesse Barnes712531b2009-01-09 13:56:14 -0800724 if (mode_changed) {
Ilija Hadzic48b1f5d2013-10-29 11:09:45 -0400725 if (drm_helper_crtc_in_use(set->crtc)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800726 DRM_DEBUG_KMS("attempting to set mode from"
727 " userspace\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800728 drm_mode_debug_printmodeline(set->mode);
Matt Roperf4510a22014-04-01 15:22:40 -0700729 set->crtc->primary->fb = set->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800730 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500731 set->x, set->y,
Ilija Hadzicbec2eac2013-10-29 11:09:42 -0400732 save_set.fb)) {
Ville Syrjäläfa3ab4c2015-12-08 18:41:53 +0200733 DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n",
734 set->crtc->base.id, set->crtc->name);
Matt Roperf4510a22014-04-01 15:22:40 -0700735 set->crtc->primary->fb = save_set.fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800736 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200737 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800738 }
Daniel Vetter25f397a2013-07-19 18:57:11 +0200739 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
740 for (i = 0; i < set->num_connectors; i++) {
741 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
Jani Nikula25933822014-06-03 14:56:20 +0300742 set->connectors[i]->name);
Daniel Vetter25f397a2013-07-19 18:57:11 +0200743 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
744 }
Dave Airlief453ba02008-11-07 14:05:41 -0800745 }
Daniel Vetterb182cc52014-03-20 14:26:34 +0100746 __drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800747 } else if (fb_changed) {
Ben Skeggs9b1596a2009-09-18 10:43:52 +1000748 set->crtc->x = set->x;
749 set->crtc->y = set->y;
Matt Roperf4510a22014-04-01 15:22:40 -0700750 set->crtc->primary->fb = set->fb;
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000751 ret = crtc_funcs->mode_set_base(set->crtc,
Ilija Hadzicbec2eac2013-10-29 11:09:42 -0400752 set->x, set->y, save_set.fb);
Chris Wilson0ba41e42011-01-08 15:10:41 +0000753 if (ret != 0) {
Ilija Hadzicfbce4062013-10-29 11:09:43 -0400754 set->crtc->x = save_set.x;
755 set->crtc->y = save_set.y;
Matt Roperf4510a22014-04-01 15:22:40 -0700756 set->crtc->primary->fb = save_set.fb;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200757 goto fail;
Chris Wilson0ba41e42011-01-08 15:10:41 +0000758 }
Dave Airlief453ba02008-11-07 14:05:41 -0800759 }
760
Philipp Zabel93f55972016-06-02 19:27:52 +0200761 kfree(save_connector_encoders);
762 kfree(save_encoder_crtcs);
Dave Airlief453ba02008-11-07 14:05:41 -0800763 return 0;
764
Maarten Maathuise67aae72009-08-27 10:18:29 +0200765fail:
766 /* Restore all previous data. */
Dave Airlief453ba02008-11-07 14:05:41 -0800767 count = 0;
Daniel Vetter6295d602015-07-09 23:44:25 +0200768 drm_for_each_encoder(encoder, dev) {
Philipp Zabel93f55972016-06-02 19:27:52 +0200769 encoder->crtc = save_encoder_crtcs[count++];
Chris Wilsone62fb642009-02-11 16:39:21 +0000770 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200771
Dave Airlief453ba02008-11-07 14:05:41 -0800772 count = 0;
Thierry Redingb982dab2017-02-28 15:46:43 +0100773 drm_connector_list_iter_begin(dev, &conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100774 drm_for_each_connector_iter(connector, &conn_iter)
Philipp Zabel93f55972016-06-02 19:27:52 +0200775 connector->encoder = save_connector_encoders[count++];
Thierry Redingb982dab2017-02-28 15:46:43 +0100776 drm_connector_list_iter_end(&conn_iter);
Maarten Maathuise67aae72009-08-27 10:18:29 +0200777
Philipp Zabelfffc5f52016-06-02 19:27:51 +0200778 /* after fail drop reference on all unbound connectors in set, let
779 * bound connectors keep their reference
780 */
Dave Airlie0955c122016-04-27 11:27:54 +1000781 for (ro = 0; ro < set->num_connectors; ro++) {
Philipp Zabelfffc5f52016-06-02 19:27:51 +0200782 if (set->connectors[ro]->encoder)
783 continue;
Thierry Redingad093602017-02-28 15:46:39 +0100784 drm_connector_put(set->connectors[ro]);
Dave Airlie0955c122016-04-27 11:27:54 +1000785 }
786
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800787 /* Try to restore the config */
788 if (mode_changed &&
789 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
790 save_set.y, save_set.fb))
791 DRM_ERROR("failed to restore config after modeset failure\n");
792
Philipp Zabel93f55972016-06-02 19:27:52 +0200793 kfree(save_connector_encoders);
794 kfree(save_encoder_crtcs);
Dave Airlief453ba02008-11-07 14:05:41 -0800795 return ret;
796}
797EXPORT_SYMBOL(drm_crtc_helper_set_config);
798
Keith Packardc9fb15f2009-05-30 20:42:28 -0700799static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
800{
801 int dpms = DRM_MODE_DPMS_OFF;
802 struct drm_connector *connector;
Daniel Vetterc36a3252016-12-15 16:58:43 +0100803 struct drm_connector_list_iter conn_iter;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700804 struct drm_device *dev = encoder->dev;
805
Thierry Redingb982dab2017-02-28 15:46:43 +0100806 drm_connector_list_iter_begin(dev, &conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100807 drm_for_each_connector_iter(connector, &conn_iter)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700808 if (connector->encoder == encoder)
809 if (connector->dpms < dpms)
810 dpms = connector->dpms;
Thierry Redingb982dab2017-02-28 15:46:43 +0100811 drm_connector_list_iter_end(&conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100812
Keith Packardc9fb15f2009-05-30 20:42:28 -0700813 return dpms;
814}
815
Sean Paul3b336ec2013-08-14 16:47:37 -0400816/* Helper which handles bridge ordering around encoder dpms */
817static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode)
818{
Jani Nikulabe26a662015-03-11 11:51:06 +0200819 const struct drm_encoder_helper_funcs *encoder_funcs;
Sean Paul3b336ec2013-08-14 16:47:37 -0400820
Noralf Trønnes75229ec2016-05-05 15:24:32 +0200821 encoder_funcs = encoder->helper_private;
822 if (!encoder_funcs)
823 return;
824
Sean Paul3b336ec2013-08-14 16:47:37 -0400825 if (encoder_funcs->dpms)
826 encoder_funcs->dpms(encoder, mode);
Sean Paul3b336ec2013-08-14 16:47:37 -0400827}
828
Keith Packardc9fb15f2009-05-30 20:42:28 -0700829static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
830{
831 int dpms = DRM_MODE_DPMS_OFF;
832 struct drm_connector *connector;
Daniel Vetterc36a3252016-12-15 16:58:43 +0100833 struct drm_connector_list_iter conn_iter;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700834 struct drm_device *dev = crtc->dev;
835
Thierry Redingb982dab2017-02-28 15:46:43 +0100836 drm_connector_list_iter_begin(dev, &conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100837 drm_for_each_connector_iter(connector, &conn_iter)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700838 if (connector->encoder && connector->encoder->crtc == crtc)
839 if (connector->dpms < dpms)
840 dpms = connector->dpms;
Thierry Redingb982dab2017-02-28 15:46:43 +0100841 drm_connector_list_iter_end(&conn_iter);
Daniel Vetterc36a3252016-12-15 16:58:43 +0100842
Keith Packardc9fb15f2009-05-30 20:42:28 -0700843 return dpms;
844}
845
846/**
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100847 * drm_helper_connector_dpms() - connector dpms helper implementation
848 * @connector: affected connector
849 * @mode: DPMS mode
Keith Packardc9fb15f2009-05-30 20:42:28 -0700850 *
Daniel Vetter6806cdf2017-01-25 07:26:43 +0100851 * The drm_helper_connector_dpms() helper function implements the
852 * &drm_connector_funcs.dpms callback for drivers using the legacy CRTC
853 * helpers.
Daniel Vetter2be94972015-12-04 09:45:46 +0100854 *
855 * This is the main helper function provided by the CRTC helper framework for
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100856 * implementing the DPMS connector attribute. It computes the new desired DPMS
Daniel Vetter6806cdf2017-01-25 07:26:43 +0100857 * state for all encoders and CRTCs in the output mesh and calls the
858 * &drm_crtc_helper_funcs.dpms and &drm_encoder_helper_funcs.dpms callbacks
859 * provided by the driver.
Daniel Vetter2be94972015-12-04 09:45:46 +0100860 *
861 * This function is deprecated. New drivers must implement atomic modeset
Daniel Vetter144a7992017-07-25 14:02:04 +0200862 * support, where DPMS is handled in the DRM core.
Maarten Lankhorst9a69a9a2015-07-21 11:34:55 +0200863 *
864 * Returns:
865 * Always returns 0.
Keith Packardc9fb15f2009-05-30 20:42:28 -0700866 */
Maarten Lankhorst9a69a9a2015-07-21 11:34:55 +0200867int drm_helper_connector_dpms(struct drm_connector *connector, int mode)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700868{
869 struct drm_encoder *encoder = connector->encoder;
870 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
Sean Paul3b336ec2013-08-14 16:47:37 -0400871 int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700872
Daniel Vetter2b5ab0e2019-01-10 11:30:45 +0100873 WARN_ON(drm_drv_uses_atomic_modeset(connector->dev));
874
Keith Packardc9fb15f2009-05-30 20:42:28 -0700875 if (mode == connector->dpms)
Maarten Lankhorst9a69a9a2015-07-21 11:34:55 +0200876 return 0;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700877
878 old_dpms = connector->dpms;
879 connector->dpms = mode;
880
Sean Paul3b336ec2013-08-14 16:47:37 -0400881 if (encoder)
882 encoder_dpms = drm_helper_choose_encoder_dpms(encoder);
883
Keith Packardc9fb15f2009-05-30 20:42:28 -0700884 /* from off to on, do crtc then encoder */
885 if (mode < old_dpms) {
886 if (crtc) {
Jani Nikulabe26a662015-03-11 11:51:06 +0200887 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
Suraj Upadhyay948de8422020-07-02 18:53:32 +0530888
Keith Packardc9fb15f2009-05-30 20:42:28 -0700889 if (crtc_funcs->dpms)
890 (*crtc_funcs->dpms) (crtc,
891 drm_helper_choose_crtc_dpms(crtc));
892 }
Sean Paul3b336ec2013-08-14 16:47:37 -0400893 if (encoder)
894 drm_helper_encoder_dpms(encoder, encoder_dpms);
Keith Packardc9fb15f2009-05-30 20:42:28 -0700895 }
896
897 /* from on to off, do encoder then crtc */
898 if (mode > old_dpms) {
Sean Paul3b336ec2013-08-14 16:47:37 -0400899 if (encoder)
900 drm_helper_encoder_dpms(encoder, encoder_dpms);
Keith Packardc9fb15f2009-05-30 20:42:28 -0700901 if (crtc) {
Jani Nikulabe26a662015-03-11 11:51:06 +0200902 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
Suraj Upadhyay948de8422020-07-02 18:53:32 +0530903
Keith Packardc9fb15f2009-05-30 20:42:28 -0700904 if (crtc_funcs->dpms)
905 (*crtc_funcs->dpms) (crtc,
906 drm_helper_choose_crtc_dpms(crtc));
907 }
908 }
909
Maarten Lankhorst9a69a9a2015-07-21 11:34:55 +0200910 return 0;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700911}
912EXPORT_SYMBOL(drm_helper_connector_dpms);
913
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100914/**
Daniel Vetteraa4cd912014-01-22 16:42:02 +0100915 * drm_helper_resume_force_mode - force-restore mode setting configuration
916 * @dev: drm_device which should be restored
917 *
918 * Drivers which use the mode setting helpers can use this function to
919 * force-restore the mode setting configuration e.g. on resume or when something
920 * else might have trampled over the hw state (like some overzealous old BIOSen
921 * tended to do).
Daniel Vetter00d762c2014-01-23 22:28:30 +0100922 *
923 * This helper doesn't provide a error return value since restoring the old
924 * config should never fail due to resource allocation issues since the driver
925 * has successfully set the restored configuration already. Hence this should
926 * boil down to the equivalent of a few dpms on calls, which also don't provide
927 * an error code.
928 *
929 * Drivers where simply restoring an old configuration again might fail (e.g.
930 * due to slight differences in allocating shared resources when the
931 * configuration is restored in a different order than when userspace set it up)
932 * need to use their own restore logic.
Thierry Reding14942762015-12-02 17:50:04 +0100933 *
934 * This function is deprecated. New drivers should implement atomic mode-
935 * setting and use the atomic suspend/resume helpers.
936 *
937 * See also:
938 * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
Daniel Vetteraa4cd912014-01-22 16:42:02 +0100939 */
Daniel Vetter00d762c2014-01-23 22:28:30 +0100940void drm_helper_resume_force_mode(struct drm_device *dev)
Dave Airlief453ba02008-11-07 14:05:41 -0800941{
942 struct drm_crtc *crtc;
David John89347bb2009-12-31 12:00:46 +0530943 struct drm_encoder *encoder;
Jani Nikulabe26a662015-03-11 11:51:06 +0200944 const struct drm_crtc_helper_funcs *crtc_funcs;
Daniel Vetter00d762c2014-01-23 22:28:30 +0100945 int encoder_dpms;
946 bool ret;
Dave Airlief453ba02008-11-07 14:05:41 -0800947
Daniel Vetter2b5ab0e2019-01-10 11:30:45 +0100948 WARN_ON(drm_drv_uses_atomic_modeset(dev));
949
Dave Airlie3ea87852014-03-21 10:45:40 +1000950 drm_modeset_lock_all(dev);
Daniel Vetter6295d602015-07-09 23:44:25 +0200951 drm_for_each_crtc(crtc, dev) {
Dave Airlief453ba02008-11-07 14:05:41 -0800952
953 if (!crtc->enabled)
954 continue;
955
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500956 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
Matt Roperf4510a22014-04-01 15:22:40 -0700957 crtc->x, crtc->y, crtc->primary->fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800958
Daniel Vetter00d762c2014-01-23 22:28:30 +0100959 /* Restoring the old config should never fail! */
Dave Airlief453ba02008-11-07 14:05:41 -0800960 if (ret == false)
961 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
David John89347bb2009-12-31 12:00:46 +0530962
963 /* Turn off outputs that were already powered off */
964 if (drm_helper_choose_crtc_dpms(crtc)) {
Daniel Vetter6295d602015-07-09 23:44:25 +0200965 drm_for_each_encoder(encoder, dev) {
David John89347bb2009-12-31 12:00:46 +0530966
967 if(encoder->crtc != crtc)
968 continue;
969
Sean Paul3b336ec2013-08-14 16:47:37 -0400970 encoder_dpms = drm_helper_choose_encoder_dpms(
971 encoder);
972
973 drm_helper_encoder_dpms(encoder, encoder_dpms);
David John89347bb2009-12-31 12:00:46 +0530974 }
Chris Wilson817e6312010-08-06 15:03:31 +0100975
976 crtc_funcs = crtc->helper_private;
977 if (crtc_funcs->dpms)
978 (*crtc_funcs->dpms) (crtc,
979 drm_helper_choose_crtc_dpms(crtc));
David John89347bb2009-12-31 12:00:46 +0530980 }
Dave Airlief453ba02008-11-07 14:05:41 -0800981 }
Daniel Vetter00d762c2014-01-23 22:28:30 +0100982
Zhao Yakuiaf4fcb52009-07-08 14:13:13 +0800983 /* disable the unused connectors while restoring the modesetting */
Daniel Vetterb182cc52014-03-20 14:26:34 +0100984 __drm_helper_disable_unused_functions(dev);
Dave Airlie3ea87852014-03-21 10:45:40 +1000985 drm_modeset_unlock_all(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800986}
987EXPORT_SYMBOL(drm_helper_resume_force_mode);
Daniel Vetterc2d88e02018-12-17 20:43:00 +0100988
989/**
990 * drm_helper_force_disable_all - Forcibly turn off all enabled CRTCs
991 * @dev: DRM device whose CRTCs to turn off
992 *
993 * Drivers may want to call this on unload to ensure that all displays are
994 * unlit and the GPU is in a consistent, low power state. Takes modeset locks.
995 *
996 * Note: This should only be used by non-atomic legacy drivers. For an atomic
997 * version look at drm_atomic_helper_shutdown().
998 *
999 * Returns:
1000 * Zero on success, error code on failure.
1001 */
1002int drm_helper_force_disable_all(struct drm_device *dev)
1003{
1004 struct drm_crtc *crtc;
1005 int ret = 0;
1006
1007 drm_modeset_lock_all(dev);
1008 drm_for_each_crtc(crtc, dev)
1009 if (crtc->enabled) {
1010 struct drm_mode_set set = {
1011 .crtc = crtc,
1012 };
1013
1014 ret = drm_mode_set_config_internal(&set);
1015 if (ret)
1016 goto out;
1017 }
1018out:
1019 drm_modeset_unlock_all(dev);
1020 return ret;
1021}
1022EXPORT_SYMBOL(drm_helper_force_disable_all);