1f453ba04SDave Airlie /*
2f453ba04SDave Airlie * Copyright (c) 2006-2008 Intel Corporation
3f453ba04SDave Airlie * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4f453ba04SDave Airlie *
5f453ba04SDave Airlie * DRM core CRTC related functions
6f453ba04SDave Airlie *
7f453ba04SDave Airlie * Permission to use, copy, modify, distribute, and sell this software and its
8f453ba04SDave Airlie * documentation for any purpose is hereby granted without fee, provided that
9f453ba04SDave Airlie * the above copyright notice appear in all copies and that both that copyright
10f453ba04SDave Airlie * notice and this permission notice appear in supporting documentation, and
11f453ba04SDave Airlie * that the name of the copyright holders not be used in advertising or
12f453ba04SDave Airlie * publicity pertaining to distribution of the software without specific,
13f453ba04SDave Airlie * written prior permission. The copyright holders make no representations
14f453ba04SDave Airlie * about the suitability of this software for any purpose. It is provided "as
15f453ba04SDave Airlie * is" without express or implied warranty.
16f453ba04SDave Airlie *
17f453ba04SDave Airlie * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18f453ba04SDave Airlie * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19f453ba04SDave Airlie * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20f453ba04SDave Airlie * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21f453ba04SDave Airlie * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22f453ba04SDave Airlie * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
23f453ba04SDave Airlie * OF THIS SOFTWARE.
24f453ba04SDave Airlie *
25f453ba04SDave Airlie * Authors:
26f453ba04SDave Airlie * Keith Packard
27f453ba04SDave Airlie * Eric Anholt <eric@anholt.net>
28f453ba04SDave Airlie * Dave Airlie <airlied@linux.ie>
29f453ba04SDave Airlie * Jesse Barnes <jesse.barnes@intel.com>
30f453ba04SDave Airlie */
31f453ba04SDave Airlie
322d1a8a48SPaul Gortmaker #include <linux/export.h>
330500c04eSSam Ravnborg #include <linux/kernel.h>
340603ba14SPaul Gortmaker #include <linux/moduleparam.h>
35f158936bSJim Cromie #include <linux/dynamic_debug.h>
362d1a8a48SPaul Gortmaker
37321ebf04SDaniel Vetter #include <drm/drm_atomic.h>
380500c04eSSam Ravnborg #include <drm/drm_atomic_helper.h>
3972fdb40cSDaniel Vetter #include <drm/drm_atomic_uapi.h>
40ee68c743SBoris Brezillon #include <drm/drm_bridge.h>
41760285e7SDavid Howells #include <drm/drm_crtc.h>
42760285e7SDavid Howells #include <drm/drm_crtc_helper.h>
430500c04eSSam Ravnborg #include <drm/drm_drv.h>
44760285e7SDavid Howells #include <drm/drm_edid.h>
450500c04eSSam Ravnborg #include <drm/drm_encoder.h>
460500c04eSSam Ravnborg #include <drm/drm_fourcc.h>
47720cf96dSVille Syrjälä #include <drm/drm_framebuffer.h>
480500c04eSSam Ravnborg #include <drm/drm_print.h>
490500c04eSSam Ravnborg #include <drm/drm_vblank.h>
50f453ba04SDave Airlie
518dc056efSBenjamin Gaignard #include "drm_crtc_helper_internal.h"
528dc056efSBenjamin Gaignard
53f158936bSJim Cromie DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
54f158936bSJim Cromie "DRM_UT_CORE",
55f158936bSJim Cromie "DRM_UT_DRIVER",
56f158936bSJim Cromie "DRM_UT_KMS",
57f158936bSJim Cromie "DRM_UT_PRIME",
58f158936bSJim Cromie "DRM_UT_ATOMIC",
59f158936bSJim Cromie "DRM_UT_VBL",
60f158936bSJim Cromie "DRM_UT_STATE",
61f158936bSJim Cromie "DRM_UT_LEASE",
62f158936bSJim Cromie "DRM_UT_DP",
63f158936bSJim Cromie "DRM_UT_DRMRES");
64f158936bSJim Cromie
653150c7d0SDaniel Vetter /**
663150c7d0SDaniel Vetter * DOC: overview
673150c7d0SDaniel Vetter *
683150c7d0SDaniel Vetter * The CRTC modeset helper library provides a default set_config implementation
693150c7d0SDaniel Vetter * in drm_crtc_helper_set_config(). Plus a few other convenience functions using
703150c7d0SDaniel Vetter * the same callbacks which drivers can use to e.g. restore the modeset
713150c7d0SDaniel Vetter * configuration on resume with drm_helper_resume_force_mode().
723150c7d0SDaniel Vetter *
732be94971SDaniel Vetter * Note that this helper library doesn't track the current power state of CRTCs
746806cdf9SDaniel Vetter * and encoders. It can call callbacks like &drm_encoder_helper_funcs.dpms even
756806cdf9SDaniel Vetter * though the hardware is already in the desired state. This deficiency has been
766806cdf9SDaniel Vetter * fixed in the atomic helpers.
772be94971SDaniel Vetter *
783150c7d0SDaniel Vetter * The driver callbacks are mostly compatible with the atomic modeset helpers,
793150c7d0SDaniel Vetter * except for the handling of the primary plane: Atomic helpers require that the
803150c7d0SDaniel Vetter * primary plane is implemented as a real standalone plane and not directly tied
813150c7d0SDaniel Vetter * to the CRTC state. For easier transition this library provides functions to
823150c7d0SDaniel Vetter * implement the old semantics required by the CRTC helpers using the new plane
833150c7d0SDaniel Vetter * and atomic helper callbacks.
843150c7d0SDaniel Vetter *
853150c7d0SDaniel Vetter * Drivers are strongly urged to convert to the atomic helpers (by way of first
863150c7d0SDaniel Vetter * converting to the plane helpers). New drivers must not use these functions
873150c7d0SDaniel Vetter * but need to implement the atomic interface instead, potentially using the
883150c7d0SDaniel Vetter * atomic helpers for that.
89092d01daSDaniel Vetter *
90092d01daSDaniel Vetter * These legacy modeset helpers use the same function table structures as
91092d01daSDaniel Vetter * all other modesetting helpers. See the documentation for struct
92ea0dd85aSDaniel Vetter * &drm_crtc_helper_funcs, &struct drm_encoder_helper_funcs and struct
93092d01daSDaniel Vetter * &drm_connector_helper_funcs.
943150c7d0SDaniel Vetter */
9592b6f89fSDaniel Vetter
960d4ed4c8SDaniel Vetter /**
97c9fb15f6SKeith Packard * drm_helper_encoder_in_use - check if a given encoder is in use
98c9fb15f6SKeith Packard * @encoder: encoder to check
99c9fb15f6SKeith Packard *
1003fcc42e0SDaniel Vetter * Checks whether @encoder is with the current mode setting output configuration
1013fcc42e0SDaniel Vetter * in use by any connector. This doesn't mean that it is actually enabled since
1023fcc42e0SDaniel Vetter * the DPMS state is tracked separately.
103c9fb15f6SKeith Packard *
1043fcc42e0SDaniel Vetter * Returns:
1053fcc42e0SDaniel Vetter * True if @encoder is used, false otherwise.
106c9fb15f6SKeith Packard */
drm_helper_encoder_in_use(struct drm_encoder * encoder)107c9fb15f6SKeith Packard bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
108c9fb15f6SKeith Packard {
109c9fb15f6SKeith Packard struct drm_connector *connector;
110c36a3254SDaniel Vetter struct drm_connector_list_iter conn_iter;
111c9fb15f6SKeith Packard struct drm_device *dev = encoder->dev;
11262ff94a5SDaniel Vetter
1132b5ab0eeSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(dev));
1142b5ab0eeSDaniel Vetter
115ba6f5826SSergei Antonov /*
116ba6f5826SSergei Antonov * We can expect this mutex to be locked if we are not panicking.
117ba6f5826SSergei Antonov * Locking is currently fubar in the panic handler.
118ba6f5826SSergei Antonov */
1198d4ad9d4SDave Airlie if (!oops_in_progress) {
12062ff94a5SDaniel Vetter WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
12151fd371bSRob Clark WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1228d4ad9d4SDave Airlie }
123ba6f5826SSergei Antonov
124c36a3254SDaniel Vetter
125b982dab1SThierry Reding drm_connector_list_iter_begin(dev, &conn_iter);
126c36a3254SDaniel Vetter drm_for_each_connector_iter(connector, &conn_iter) {
127c36a3254SDaniel Vetter if (connector->encoder == encoder) {
128b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
129c9fb15f6SKeith Packard return true;
130c36a3254SDaniel Vetter }
131c36a3254SDaniel Vetter }
132b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
133c9fb15f6SKeith Packard return false;
134c9fb15f6SKeith Packard }
135c9fb15f6SKeith Packard EXPORT_SYMBOL(drm_helper_encoder_in_use);
136c9fb15f6SKeith Packard
137c9fb15f6SKeith Packard /**
138f453ba04SDave Airlie * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
139f453ba04SDave Airlie * @crtc: CRTC to check
140f453ba04SDave Airlie *
1413fcc42e0SDaniel Vetter * Checks whether @crtc is with the current mode setting output configuration
1423fcc42e0SDaniel Vetter * in use by any connector. This doesn't mean that it is actually enabled since
1433fcc42e0SDaniel Vetter * the DPMS state is tracked separately.
144f453ba04SDave Airlie *
1453fcc42e0SDaniel Vetter * Returns:
1463fcc42e0SDaniel Vetter * True if @crtc is used, false otherwise.
147f453ba04SDave Airlie */
drm_helper_crtc_in_use(struct drm_crtc * crtc)148f453ba04SDave Airlie bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
149f453ba04SDave Airlie {
150f453ba04SDave Airlie struct drm_encoder *encoder;
151f453ba04SDave Airlie struct drm_device *dev = crtc->dev;
15262ff94a5SDaniel Vetter
1532b5ab0eeSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(dev));
1542b5ab0eeSDaniel Vetter
155ba6f5826SSergei Antonov /*
156ba6f5826SSergei Antonov * We can expect this mutex to be locked if we are not panicking.
157ba6f5826SSergei Antonov * Locking is currently fubar in the panic handler.
158ba6f5826SSergei Antonov */
159ba6f5826SSergei Antonov if (!oops_in_progress)
16062ff94a5SDaniel Vetter WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
161ba6f5826SSergei Antonov
162e4f62546SDaniel Vetter drm_for_each_encoder(encoder, dev)
163c9fb15f6SKeith Packard if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
164f453ba04SDave Airlie return true;
165f453ba04SDave Airlie return false;
166f453ba04SDave Airlie }
167f453ba04SDave Airlie EXPORT_SYMBOL(drm_helper_crtc_in_use);
168f453ba04SDave Airlie
16986a1b9d1SBen Skeggs static void
drm_encoder_disable(struct drm_encoder * encoder)17086a1b9d1SBen Skeggs drm_encoder_disable(struct drm_encoder *encoder)
17186a1b9d1SBen Skeggs {
172be26a66dSJani Nikula const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
17386a1b9d1SBen Skeggs
17475229ecaSNoralf Trønnes if (!encoder_funcs)
17575229ecaSNoralf Trønnes return;
17675229ecaSNoralf Trønnes
17786a1b9d1SBen Skeggs if (encoder_funcs->disable)
17886a1b9d1SBen Skeggs (*encoder_funcs->disable)(encoder);
17975229ecaSNoralf Trønnes else if (encoder_funcs->dpms)
18086a1b9d1SBen Skeggs (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
18186a1b9d1SBen Skeggs }
18286a1b9d1SBen Skeggs
__drm_helper_disable_unused_functions(struct drm_device * dev)183b182cc59SDaniel Vetter static void __drm_helper_disable_unused_functions(struct drm_device *dev)
184f453ba04SDave Airlie {
185f453ba04SDave Airlie struct drm_encoder *encoder;
186f453ba04SDave Airlie struct drm_crtc *crtc;
187f453ba04SDave Airlie
18862ff94a5SDaniel Vetter drm_warn_on_modeset_not_all_locked(dev);
18962ff94a5SDaniel Vetter
1906295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
19192971021SDave Airlie if (!drm_helper_encoder_in_use(encoder)) {
19286a1b9d1SBen Skeggs drm_encoder_disable(encoder);
193b5e6c1daSRob Clark /* disconnect encoder from any connector */
194a3a0544bSDave Airlie encoder->crtc = NULL;
195a3a0544bSDave Airlie }
1969c552dd7SDave Airlie }
197f453ba04SDave Airlie
1986295d607SDaniel Vetter drm_for_each_crtc(crtc, dev) {
199be26a66dSJani Nikula const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
200948de842SSuraj Upadhyay
201f453ba04SDave Airlie crtc->enabled = drm_helper_crtc_in_use(crtc);
202f453ba04SDave Airlie if (!crtc->enabled) {
2035c8d7171SAlex Deucher if (crtc_funcs->disable)
2045c8d7171SAlex Deucher (*crtc_funcs->disable)(crtc);
2055c8d7171SAlex Deucher else
2065c8d7171SAlex Deucher (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
207f4510a27SMatt Roper crtc->primary->fb = NULL;
208f453ba04SDave Airlie }
209f453ba04SDave Airlie }
210f453ba04SDave Airlie }
211b182cc59SDaniel Vetter
212b182cc59SDaniel Vetter /**
213b182cc59SDaniel Vetter * drm_helper_disable_unused_functions - disable unused objects
214b182cc59SDaniel Vetter * @dev: DRM device
215b182cc59SDaniel Vetter *
216b182cc59SDaniel Vetter * This function walks through the entire mode setting configuration of @dev. It
2172be94971SDaniel Vetter * will remove any CRTC links of unused encoders and encoder links of
2182be94971SDaniel Vetter * disconnected connectors. Then it will disable all unused encoders and CRTCs
219b182cc59SDaniel Vetter * either by calling their disable callback if available or by calling their
220b182cc59SDaniel Vetter * dpms callback with DRM_MODE_DPMS_OFF.
22109859d2aSDaniel Vetter *
22209859d2aSDaniel Vetter * NOTE:
22309859d2aSDaniel Vetter *
22409859d2aSDaniel Vetter * This function is part of the legacy modeset helper library and will cause
22509859d2aSDaniel Vetter * major confusion with atomic drivers. This is because atomic helpers guarantee
22609859d2aSDaniel Vetter * to never call ->disable() hooks on a disabled function, or ->enable() hooks
22709859d2aSDaniel Vetter * on an enabled functions. drm_helper_disable_unused_functions() on the other
22809859d2aSDaniel Vetter * hand throws such guarantees into the wind and calls disable hooks
22909859d2aSDaniel Vetter * unconditionally on unused functions.
230b182cc59SDaniel Vetter */
drm_helper_disable_unused_functions(struct drm_device * dev)231b182cc59SDaniel Vetter void drm_helper_disable_unused_functions(struct drm_device *dev)
232b182cc59SDaniel Vetter {
2332b5ab0eeSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(dev));
2346605ca0fSDaniel Vetter
23576fd2c37SSean Paul drm_modeset_lock_all(dev);
236b182cc59SDaniel Vetter __drm_helper_disable_unused_functions(dev);
23776fd2c37SSean Paul drm_modeset_unlock_all(dev);
238b182cc59SDaniel Vetter }
239f453ba04SDave Airlie EXPORT_SYMBOL(drm_helper_disable_unused_functions);
240f453ba04SDave Airlie
2417bec756cSJesse Barnes /*
2427bec756cSJesse Barnes * Check the CRTC we're going to map each output to vs. its current
2437bec756cSJesse Barnes * CRTC. If they don't match, we have to disable the output and the CRTC
2447bec756cSJesse Barnes * since the driver will have to re-route things.
2457bec756cSJesse Barnes */
2467bec756cSJesse Barnes static void
drm_crtc_prepare_encoders(struct drm_device * dev)2477bec756cSJesse Barnes drm_crtc_prepare_encoders(struct drm_device *dev)
2487bec756cSJesse Barnes {
249be26a66dSJani Nikula const struct drm_encoder_helper_funcs *encoder_funcs;
2507bec756cSJesse Barnes struct drm_encoder *encoder;
2517bec756cSJesse Barnes
2526295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
2537bec756cSJesse Barnes encoder_funcs = encoder->helper_private;
25475229ecaSNoralf Trønnes if (!encoder_funcs)
25575229ecaSNoralf Trønnes continue;
25675229ecaSNoralf Trønnes
2577bec756cSJesse Barnes /* Disable unused encoders */
2587bec756cSJesse Barnes if (encoder->crtc == NULL)
25986a1b9d1SBen Skeggs drm_encoder_disable(encoder);
2607bec756cSJesse Barnes }
2617bec756cSJesse Barnes }
2627bec756cSJesse Barnes
263f453ba04SDave Airlie /**
2640d4ed4c8SDaniel Vetter * drm_crtc_helper_set_mode - internal helper to set a mode
265f453ba04SDave Airlie * @crtc: CRTC to program
266f453ba04SDave Airlie * @mode: mode to use
2674c9287c6SAlex Deucher * @x: horizontal offset into the surface
2684c9287c6SAlex Deucher * @y: vertical offset into the surface
2690d4ed4c8SDaniel Vetter * @old_fb: old framebuffer, for cleanup
270f453ba04SDave Airlie *
271f453ba04SDave Airlie * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
2720d4ed4c8SDaniel Vetter * to fixup or reject the mode prior to trying to set it. This is an internal
2730d4ed4c8SDaniel Vetter * helper that drivers could e.g. use to update properties that require the
2740d4ed4c8SDaniel Vetter * entire output pipe to be disabled and re-enabled in a new configuration. For
2750d4ed4c8SDaniel Vetter * example for changing whether audio is enabled on a hdmi link or for changing
2760d4ed4c8SDaniel Vetter * panel fitter or dither attributes. It is also called by the
2770d4ed4c8SDaniel Vetter * drm_crtc_helper_set_config() helper function to drive the mode setting
2780d4ed4c8SDaniel Vetter * sequence.
279f453ba04SDave Airlie *
2803fcc42e0SDaniel Vetter * Returns:
2813fcc42e0SDaniel Vetter * True if the mode was set successfully, false otherwise.
282f453ba04SDave Airlie */
drm_crtc_helper_set_mode(struct drm_crtc * crtc,struct drm_display_mode * mode,int x,int y,struct drm_framebuffer * old_fb)283f453ba04SDave Airlie bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
284f453ba04SDave Airlie struct drm_display_mode *mode,
2853c4fdcfbSKristian Høgsberg int x, int y,
2863c4fdcfbSKristian Høgsberg struct drm_framebuffer *old_fb)
287f453ba04SDave Airlie {
288f453ba04SDave Airlie struct drm_device *dev = crtc->dev;
2895a27528aSDaniel Stone struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
290be26a66dSJani Nikula const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
291be26a66dSJani Nikula const struct drm_encoder_helper_funcs *encoder_funcs;
292f453ba04SDave Airlie int saved_x, saved_y;
2937e99acdcSIlija Hadzic bool saved_enabled;
294f453ba04SDave Airlie struct drm_encoder *encoder;
295f453ba04SDave Airlie bool ret = true;
296f453ba04SDave Airlie
2972b5ab0eeSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(dev));
2982b5ab0eeSDaniel Vetter
29962ff94a5SDaniel Vetter drm_warn_on_modeset_not_all_locked(dev);
30062ff94a5SDaniel Vetter
3017e99acdcSIlija Hadzic saved_enabled = crtc->enabled;
302f453ba04SDave Airlie crtc->enabled = drm_helper_crtc_in_use(crtc);
303f453ba04SDave Airlie if (!crtc->enabled)
304f453ba04SDave Airlie return true;
305f453ba04SDave Airlie
306021a8455SChris Wilson adjusted_mode = drm_mode_duplicate(dev, mode);
3077e99acdcSIlija Hadzic if (!adjusted_mode) {
3087e99acdcSIlija Hadzic crtc->enabled = saved_enabled;
3096bfc56aaSVille Syrjälä return false;
3107e99acdcSIlija Hadzic }
311021a8455SChris Wilson
312563c4a75SVille Syrjälä drm_mode_init(&saved_mode, &crtc->mode);
313563c4a75SVille Syrjälä drm_mode_init(&saved_hwmode, &crtc->hwmode);
314f453ba04SDave Airlie saved_x = crtc->x;
315f453ba04SDave Airlie saved_y = crtc->y;
316f453ba04SDave Airlie
317f453ba04SDave Airlie /* Update crtc values up front so the driver can rely on them for mode
318f453ba04SDave Airlie * setting.
319f453ba04SDave Airlie */
320a3342f4dSVille Syrjälä drm_mode_copy(&crtc->mode, mode);
321f453ba04SDave Airlie crtc->x = x;
322f453ba04SDave Airlie crtc->y = y;
323f453ba04SDave Airlie
324f453ba04SDave Airlie /* Pass our mode to the connectors and the CRTC to give them a chance to
325f453ba04SDave Airlie * adjust it according to limitations or connector properties, and also
326f453ba04SDave Airlie * a chance to reject the mode entirely.
327f453ba04SDave Airlie */
3286295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
329f453ba04SDave Airlie
330f453ba04SDave Airlie if (encoder->crtc != crtc)
331f453ba04SDave Airlie continue;
3323b336ec4SSean Paul
33375229ecaSNoralf Trønnes encoder_funcs = encoder->helper_private;
33475229ecaSNoralf Trønnes if (!encoder_funcs)
33575229ecaSNoralf Trønnes continue;
33675229ecaSNoralf Trønnes
337f453ba04SDave Airlie encoder_funcs = encoder->helper_private;
3383c5b2673SCarlos Palminha if (encoder_funcs->mode_fixup) {
339f453ba04SDave Airlie if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
340f453ba04SDave Airlie adjusted_mode))) {
341836e53d7SAdam Jackson DRM_DEBUG_KMS("Encoder fixup failed\n");
342f453ba04SDave Airlie goto done;
343f453ba04SDave Airlie }
344f453ba04SDave Airlie }
3453c5b2673SCarlos Palminha }
346f453ba04SDave Airlie
34749f718c5SCarlos Palminha if (crtc_funcs->mode_fixup) {
34849f718c5SCarlos Palminha if (!(ret = crtc_funcs->mode_fixup(crtc, mode,
34949f718c5SCarlos Palminha adjusted_mode))) {
350836e53d7SAdam Jackson DRM_DEBUG_KMS("CRTC fixup failed\n");
351f453ba04SDave Airlie goto done;
352f453ba04SDave Airlie }
35349f718c5SCarlos Palminha }
354fa3ab4c2SVille Syrjälä DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
355f453ba04SDave Airlie
356a3342f4dSVille Syrjälä drm_mode_copy(&crtc->hwmode, adjusted_mode);
3575a27528aSDaniel Stone
358f453ba04SDave Airlie /* Prepare the encoders and CRTCs before setting the mode. */
3596295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
360f453ba04SDave Airlie
361f453ba04SDave Airlie if (encoder->crtc != crtc)
362f453ba04SDave Airlie continue;
3633b336ec4SSean Paul
36475229ecaSNoralf Trønnes encoder_funcs = encoder->helper_private;
36575229ecaSNoralf Trønnes if (!encoder_funcs)
36675229ecaSNoralf Trønnes continue;
36775229ecaSNoralf Trønnes
368f453ba04SDave Airlie /* Disable the encoders as the first thing we do. */
36975229ecaSNoralf Trønnes if (encoder_funcs->prepare)
370f453ba04SDave Airlie encoder_funcs->prepare(encoder);
371f453ba04SDave Airlie }
372f453ba04SDave Airlie
3737bec756cSJesse Barnes drm_crtc_prepare_encoders(dev);
3747bec756cSJesse Barnes
375f453ba04SDave Airlie crtc_funcs->prepare(crtc);
376f453ba04SDave Airlie
377f453ba04SDave Airlie /* Set up the DPLL and any encoders state that needs to adjust or depend
378f453ba04SDave Airlie * on the DPLL.
379f453ba04SDave Airlie */
3805c3b82e2SChris Wilson ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
3815c3b82e2SChris Wilson if (!ret)
3825c3b82e2SChris Wilson goto done;
383f453ba04SDave Airlie
3846295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
385f453ba04SDave Airlie
386f453ba04SDave Airlie if (encoder->crtc != crtc)
387f453ba04SDave Airlie continue;
388f453ba04SDave Airlie
38975229ecaSNoralf Trønnes encoder_funcs = encoder->helper_private;
39075229ecaSNoralf Trønnes if (!encoder_funcs)
39175229ecaSNoralf Trønnes continue;
39275229ecaSNoralf Trønnes
3930e691bc7SShayenne Moura DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%s]\n",
3940e691bc7SShayenne Moura encoder->base.id, encoder->name, mode->name);
39575229ecaSNoralf Trønnes if (encoder_funcs->mode_set)
396f453ba04SDave Airlie encoder_funcs->mode_set(encoder, mode, adjusted_mode);
397f453ba04SDave Airlie }
398f453ba04SDave Airlie
399f453ba04SDave Airlie /* Now enable the clocks, plane, pipe, and connectors that we set up. */
400f453ba04SDave Airlie crtc_funcs->commit(crtc);
401f453ba04SDave Airlie
4026295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
403f453ba04SDave Airlie
404f453ba04SDave Airlie if (encoder->crtc != crtc)
405f453ba04SDave Airlie continue;
406f453ba04SDave Airlie
40775229ecaSNoralf Trønnes encoder_funcs = encoder->helper_private;
40875229ecaSNoralf Trønnes if (!encoder_funcs)
40975229ecaSNoralf Trønnes continue;
41075229ecaSNoralf Trønnes
41175229ecaSNoralf Trønnes if (encoder_funcs->commit)
412f453ba04SDave Airlie encoder_funcs->commit(encoder);
413f453ba04SDave Airlie }
414f453ba04SDave Airlie
41527641c3fSMario Kleiner /* Calculate and store various constants which
41627641c3fSMario Kleiner * are later needed by vblank and swap-completion
41727641c3fSMario Kleiner * timestamping. They are derived from true hwmode.
41827641c3fSMario Kleiner */
419545cdd55SVille Syrjälä drm_calc_timestamping_constants(crtc, &crtc->hwmode);
42027641c3fSMario Kleiner
421f453ba04SDave Airlie /* FIXME: add subpixel order */
422f453ba04SDave Airlie done:
423021a8455SChris Wilson drm_mode_destroy(dev, adjusted_mode);
424f453ba04SDave Airlie if (!ret) {
4257e99acdcSIlija Hadzic crtc->enabled = saved_enabled;
426563c4a75SVille Syrjälä drm_mode_copy(&crtc->mode, &saved_mode);
427563c4a75SVille Syrjälä drm_mode_copy(&crtc->hwmode, &saved_hwmode);
428f453ba04SDave Airlie crtc->x = saved_x;
429f453ba04SDave Airlie crtc->y = saved_y;
430f453ba04SDave Airlie }
431f453ba04SDave Airlie
432f453ba04SDave Airlie return ret;
433f453ba04SDave Airlie }
434f453ba04SDave Airlie EXPORT_SYMBOL(drm_crtc_helper_set_mode);
435f453ba04SDave Airlie
436*7fed7fa3SJavier Martinez Canillas /**
437*7fed7fa3SJavier Martinez Canillas * drm_crtc_helper_atomic_check() - Helper to check CRTC atomic-state
438*7fed7fa3SJavier Martinez Canillas * @crtc: CRTC to check
439*7fed7fa3SJavier Martinez Canillas * @state: atomic state object
440*7fed7fa3SJavier Martinez Canillas *
441*7fed7fa3SJavier Martinez Canillas * Provides a default CRTC-state check handler for CRTCs that only have
442*7fed7fa3SJavier Martinez Canillas * one primary plane attached to it.
443*7fed7fa3SJavier Martinez Canillas *
444*7fed7fa3SJavier Martinez Canillas * This is often the case for the CRTC of simple framebuffers. See also
445*7fed7fa3SJavier Martinez Canillas * drm_plane_helper_atomic_check() for the respective plane-state check
446*7fed7fa3SJavier Martinez Canillas * helper function.
447*7fed7fa3SJavier Martinez Canillas *
448*7fed7fa3SJavier Martinez Canillas * RETURNS:
449*7fed7fa3SJavier Martinez Canillas * Zero on success, or an errno code otherwise.
450*7fed7fa3SJavier Martinez Canillas */
drm_crtc_helper_atomic_check(struct drm_crtc * crtc,struct drm_atomic_state * state)451*7fed7fa3SJavier Martinez Canillas int drm_crtc_helper_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state)
452*7fed7fa3SJavier Martinez Canillas {
453*7fed7fa3SJavier Martinez Canillas struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
454*7fed7fa3SJavier Martinez Canillas
455*7fed7fa3SJavier Martinez Canillas if (!new_crtc_state->enable)
456*7fed7fa3SJavier Martinez Canillas return 0;
457*7fed7fa3SJavier Martinez Canillas
458*7fed7fa3SJavier Martinez Canillas return drm_atomic_helper_check_crtc_primary_plane(new_crtc_state);
459*7fed7fa3SJavier Martinez Canillas }
460*7fed7fa3SJavier Martinez Canillas EXPORT_SYMBOL(drm_crtc_helper_atomic_check);
461*7fed7fa3SJavier Martinez Canillas
462a74591d7SThierry Reding static void
drm_crtc_helper_disable(struct drm_crtc * crtc)4636eebd6bbSChris Wilson drm_crtc_helper_disable(struct drm_crtc *crtc)
4646eebd6bbSChris Wilson {
4656eebd6bbSChris Wilson struct drm_device *dev = crtc->dev;
4666eebd6bbSChris Wilson struct drm_connector *connector;
4676eebd6bbSChris Wilson struct drm_encoder *encoder;
4686eebd6bbSChris Wilson
4696eebd6bbSChris Wilson /* Decouple all encoders and their attached connectors from this crtc */
4706295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
471c36a3254SDaniel Vetter struct drm_connector_list_iter conn_iter;
472c36a3254SDaniel Vetter
4736eebd6bbSChris Wilson if (encoder->crtc != crtc)
4746eebd6bbSChris Wilson continue;
4756eebd6bbSChris Wilson
476b982dab1SThierry Reding drm_connector_list_iter_begin(dev, &conn_iter);
477c36a3254SDaniel Vetter drm_for_each_connector_iter(connector, &conn_iter) {
4786eebd6bbSChris Wilson if (connector->encoder != encoder)
4796eebd6bbSChris Wilson continue;
4806eebd6bbSChris Wilson
4816eebd6bbSChris Wilson connector->encoder = NULL;
482a6ad6230SThierry Reding
483a6ad6230SThierry Reding /*
484a6ad6230SThierry Reding * drm_helper_disable_unused_functions() ought to be
485a6ad6230SThierry Reding * doing this, but since we've decoupled the encoder
486a6ad6230SThierry Reding * from the connector above, the required connection
487a6ad6230SThierry Reding * between them is henceforth no longer available.
488a6ad6230SThierry Reding */
489a6ad6230SThierry Reding connector->dpms = DRM_MODE_DPMS_OFF;
4900955c125SDave Airlie
4910955c125SDave Airlie /* we keep a reference while the encoder is bound */
492ad093607SThierry Reding drm_connector_put(connector);
4936eebd6bbSChris Wilson }
494b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
4956eebd6bbSChris Wilson }
4966eebd6bbSChris Wilson
497b182cc59SDaniel Vetter __drm_helper_disable_unused_functions(dev);
4986eebd6bbSChris Wilson }
4996eebd6bbSChris Wilson
500a92462d6SJosé Roberto de Souza /*
501a92462d6SJosé Roberto de Souza * For connectors that support multiple encoders, either the
502a92462d6SJosé Roberto de Souza * .atomic_best_encoder() or .best_encoder() operation must be implemented.
503a92462d6SJosé Roberto de Souza */
504a92462d6SJosé Roberto de Souza struct drm_encoder *
drm_connector_get_single_encoder(struct drm_connector * connector)505a92462d6SJosé Roberto de Souza drm_connector_get_single_encoder(struct drm_connector *connector)
506a92462d6SJosé Roberto de Souza {
50762afb4adSJosé Roberto de Souza struct drm_encoder *encoder;
50862afb4adSJosé Roberto de Souza
50962afb4adSJosé Roberto de Souza WARN_ON(hweight32(connector->possible_encoders) > 1);
51062afb4adSJosé Roberto de Souza drm_connector_for_each_possible_encoder(connector, encoder)
51162afb4adSJosé Roberto de Souza return encoder;
51262afb4adSJosé Roberto de Souza
51362afb4adSJosé Roberto de Souza return NULL;
514a92462d6SJosé Roberto de Souza }
515a92462d6SJosé Roberto de Souza
516f453ba04SDave Airlie /**
517f453ba04SDave Airlie * drm_crtc_helper_set_config - set a new config from userspace
5180d4ed4c8SDaniel Vetter * @set: mode set configuration
519a4eff9aaSDaniel Vetter * @ctx: lock acquire context, not used here
520f453ba04SDave Airlie *
5216806cdf9SDaniel Vetter * The drm_crtc_helper_set_config() helper function implements the of
5226806cdf9SDaniel Vetter * &drm_crtc_funcs.set_config callback for drivers using the legacy CRTC
5236806cdf9SDaniel Vetter * helpers.
5242be94971SDaniel Vetter *
5252be94971SDaniel Vetter * It first tries to locate the best encoder for each connector by calling the
5266806cdf9SDaniel Vetter * connector @drm_connector_helper_funcs.best_encoder helper operation.
5272be94971SDaniel Vetter *
5282be94971SDaniel Vetter * After locating the appropriate encoders, the helper function will call the
5292be94971SDaniel Vetter * mode_fixup encoder and CRTC helper operations to adjust the requested mode,
5302be94971SDaniel Vetter * or reject it completely in which case an error will be returned to the
5312be94971SDaniel Vetter * application. If the new configuration after mode adjustment is identical to
5322be94971SDaniel Vetter * the current configuration the helper function will return without performing
5332be94971SDaniel Vetter * any other operation.
5342be94971SDaniel Vetter *
5352be94971SDaniel Vetter * If the adjusted mode is identical to the current mode but changes to the
5362be94971SDaniel Vetter * frame buffer need to be applied, the drm_crtc_helper_set_config() function
5376806cdf9SDaniel Vetter * will call the CRTC &drm_crtc_helper_funcs.mode_set_base helper operation.
5382be94971SDaniel Vetter *
5392be94971SDaniel Vetter * If the adjusted mode differs from the current mode, or if the
5402be94971SDaniel Vetter * ->mode_set_base() helper operation is not provided, the helper function
5412be94971SDaniel Vetter * performs a full mode set sequence by calling the ->prepare(), ->mode_set()
5422be94971SDaniel Vetter * and ->commit() CRTC and encoder helper operations, in that order.
5432be94971SDaniel Vetter * Alternatively it can also use the dpms and disable helper operations. For
544ea0dd85aSDaniel Vetter * details see &struct drm_crtc_helper_funcs and struct
5452be94971SDaniel Vetter * &drm_encoder_helper_funcs.
5462be94971SDaniel Vetter *
5472be94971SDaniel Vetter * This function is deprecated. New drivers must implement atomic modeset
5482be94971SDaniel Vetter * support, for which this function is unsuitable. Instead drivers should use
5492be94971SDaniel Vetter * drm_atomic_helper_set_config().
550f453ba04SDave Airlie *
5513fcc42e0SDaniel Vetter * Returns:
5523fcc42e0SDaniel Vetter * Returns 0 on success, negative errno numbers on failure.
553f453ba04SDave Airlie */
drm_crtc_helper_set_config(struct drm_mode_set * set,struct drm_modeset_acquire_ctx * ctx)554a4eff9aaSDaniel Vetter int drm_crtc_helper_set_config(struct drm_mode_set *set,
555a4eff9aaSDaniel Vetter struct drm_modeset_acquire_ctx *ctx)
556f453ba04SDave Airlie {
557f453ba04SDave Airlie struct drm_device *dev;
55893f55972SPhilipp Zabel struct drm_crtc **save_encoder_crtcs, *new_crtc;
55993f55972SPhilipp Zabel struct drm_encoder **save_connector_encoders, *new_encoder, *encoder;
5604cb72b17SJakob Bornecrantz bool mode_changed = false; /* if true do a full mode set */
5614cb72b17SJakob Bornecrantz bool fb_changed = false; /* if true and !mode_changed just do a flip */
56293f55972SPhilipp Zabel struct drm_connector *connector;
563c36a3254SDaniel Vetter struct drm_connector_list_iter conn_iter;
564f453ba04SDave Airlie int count = 0, ro, fail = 0;
565be26a66dSJani Nikula const struct drm_crtc_helper_funcs *crtc_funcs;
566c5006cfeSJesse Barnes struct drm_mode_set save_set;
5674a1b0714SLaurent Pinchart int ret;
568bf9dc102SKeith Packard int i;
569f453ba04SDave Airlie
57058367ed6SZhao Yakui DRM_DEBUG_KMS("\n");
571f453ba04SDave Airlie
572e58de880SDaniel Vetter BUG_ON(!set);
573e58de880SDaniel Vetter BUG_ON(!set->crtc);
574e58de880SDaniel Vetter BUG_ON(!set->crtc->helper_private);
575f453ba04SDave Airlie
576e58de880SDaniel Vetter /* Enforce sane interface api - has been abused by the fb helper. */
577e58de880SDaniel Vetter BUG_ON(!set->mode && set->fb);
578e58de880SDaniel Vetter BUG_ON(set->fb && set->num_connectors == 0);
579f453ba04SDave Airlie
580f453ba04SDave Airlie crtc_funcs = set->crtc->helper_private;
581f453ba04SDave Airlie
5822b5ab0eeSDaniel Vetter dev = set->crtc->dev;
5832b5ab0eeSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(dev));
5842b5ab0eeSDaniel Vetter
585ede3ff52SChris Wilson if (!set->mode)
586ede3ff52SChris Wilson set->fb = NULL;
587ede3ff52SChris Wilson
5889440106bSJerome Glisse if (set->fb) {
589fa3ab4c2SVille Syrjälä DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n",
590fa3ab4c2SVille Syrjälä set->crtc->base.id, set->crtc->name,
591fa3ab4c2SVille Syrjälä set->fb->base.id,
592f453ba04SDave Airlie (int)set->num_connectors, set->x, set->y);
5939440106bSJerome Glisse } else {
594fa3ab4c2SVille Syrjälä DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n",
595fa3ab4c2SVille Syrjälä set->crtc->base.id, set->crtc->name);
596a74591d7SThierry Reding drm_crtc_helper_disable(set->crtc);
597a74591d7SThierry Reding return 0;
5989440106bSJerome Glisse }
599f453ba04SDave Airlie
60062ff94a5SDaniel Vetter drm_warn_on_modeset_not_all_locked(dev);
60162ff94a5SDaniel Vetter
60202ee4e94SIlija Hadzic /*
60302ee4e94SIlija Hadzic * Allocate space for the backup of all (non-pointer) encoder and
60402ee4e94SIlija Hadzic * connector data.
60502ee4e94SIlija Hadzic */
6064b947b1cSHarsha Sharma save_encoder_crtcs = kcalloc(dev->mode_config.num_encoder,
60793f55972SPhilipp Zabel sizeof(struct drm_crtc *), GFP_KERNEL);
60893f55972SPhilipp Zabel if (!save_encoder_crtcs)
609f453ba04SDave Airlie return -ENOMEM;
610f453ba04SDave Airlie
6114b947b1cSHarsha Sharma save_connector_encoders = kcalloc(dev->mode_config.num_connector,
61293f55972SPhilipp Zabel sizeof(struct drm_encoder *), GFP_KERNEL);
61393f55972SPhilipp Zabel if (!save_connector_encoders) {
61493f55972SPhilipp Zabel kfree(save_encoder_crtcs);
615e67aae79SMaarten Maathuis return -ENOMEM;
616e67aae79SMaarten Maathuis }
617e67aae79SMaarten Maathuis
61802ee4e94SIlija Hadzic /*
61902ee4e94SIlija Hadzic * Copy data. Note that driver private data is not affected.
620e67aae79SMaarten Maathuis * Should anything bad happen only the expected state is
621e67aae79SMaarten Maathuis * restored, not the drivers personal bookkeeping.
622e67aae79SMaarten Maathuis */
623e67aae79SMaarten Maathuis count = 0;
6246295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
62593f55972SPhilipp Zabel save_encoder_crtcs[count++] = encoder->crtc;
626e67aae79SMaarten Maathuis }
627e67aae79SMaarten Maathuis
628e67aae79SMaarten Maathuis count = 0;
629b982dab1SThierry Reding drm_connector_list_iter_begin(dev, &conn_iter);
630c36a3254SDaniel Vetter drm_for_each_connector_iter(connector, &conn_iter)
63193f55972SPhilipp Zabel save_connector_encoders[count++] = connector->encoder;
632b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
633e67aae79SMaarten Maathuis
634c5006cfeSJesse Barnes save_set.crtc = set->crtc;
635c5006cfeSJesse Barnes save_set.mode = &set->crtc->mode;
636c5006cfeSJesse Barnes save_set.x = set->crtc->x;
637c5006cfeSJesse Barnes save_set.y = set->crtc->y;
638f4510a27SMatt Roper save_set.fb = set->crtc->primary->fb;
639c5006cfeSJesse Barnes
640f453ba04SDave Airlie /* We should be able to check here if the fb has the same properties
641f453ba04SDave Airlie * and then just flip_or_move it */
642f4510a27SMatt Roper if (set->crtc->primary->fb != set->fb) {
643712531bfSJesse Barnes /* If we have no fb then treat it as a full mode set */
644f4510a27SMatt Roper if (set->crtc->primary->fb == NULL) {
64558367ed6SZhao Yakui DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
646712531bfSJesse Barnes mode_changed = true;
647dbd4d576SVille Syrjälä } else if (set->fb->format != set->crtc->primary->fb->format) {
648ce83adf7SLaurent Pinchart mode_changed = true;
6498dff4742SDave Airlie } else
650712531bfSJesse Barnes fb_changed = true;
651f453ba04SDave Airlie }
652f453ba04SDave Airlie
653f453ba04SDave Airlie if (set->x != set->crtc->x || set->y != set->crtc->y)
654712531bfSJesse Barnes fb_changed = true;
655f453ba04SDave Airlie
6562deafc7eSLiu Ying if (!drm_mode_equal(set->mode, &set->crtc->mode)) {
65758367ed6SZhao Yakui DRM_DEBUG_KMS("modes are different, full mode set\n");
658f453ba04SDave Airlie drm_mode_debug_printmodeline(&set->crtc->mode);
659f453ba04SDave Airlie drm_mode_debug_printmodeline(set->mode);
660712531bfSJesse Barnes mode_changed = true;
661f453ba04SDave Airlie }
662f453ba04SDave Airlie
663fffc5f59SPhilipp Zabel /* take a reference on all unbound connectors in set, reuse the
664fffc5f59SPhilipp Zabel * already taken reference for bound connectors
665fffc5f59SPhilipp Zabel */
6660955c125SDave Airlie for (ro = 0; ro < set->num_connectors; ro++) {
667fffc5f59SPhilipp Zabel if (set->connectors[ro]->encoder)
668fffc5f59SPhilipp Zabel continue;
669ad093607SThierry Reding drm_connector_get(set->connectors[ro]);
6700955c125SDave Airlie }
6710955c125SDave Airlie
672f453ba04SDave Airlie /* a) traverse passed in connector list and get encoders for them */
673f453ba04SDave Airlie count = 0;
674b982dab1SThierry Reding drm_connector_list_iter_begin(dev, &conn_iter);
675c36a3254SDaniel Vetter drm_for_each_connector_iter(connector, &conn_iter) {
676be26a66dSJani Nikula const struct drm_connector_helper_funcs *connector_funcs =
677f453ba04SDave Airlie connector->helper_private;
678f453ba04SDave Airlie new_encoder = connector->encoder;
679f453ba04SDave Airlie for (ro = 0; ro < set->num_connectors; ro++) {
680f453ba04SDave Airlie if (set->connectors[ro] == connector) {
681a92462d6SJosé Roberto de Souza if (connector_funcs->best_encoder)
682f453ba04SDave Airlie new_encoder = connector_funcs->best_encoder(connector);
683a92462d6SJosé Roberto de Souza else
684a92462d6SJosé Roberto de Souza new_encoder = drm_connector_get_single_encoder(connector);
685a92462d6SJosé Roberto de Souza
686f453ba04SDave Airlie /* if we can't get an encoder for a connector
687f453ba04SDave Airlie we are setting now - then fail */
688f453ba04SDave Airlie if (new_encoder == NULL)
689f453ba04SDave Airlie /* don't break so fail path works correct */
690f453ba04SDave Airlie fail = 1;
69125f397a4SDaniel Vetter
69225f397a4SDaniel Vetter if (connector->dpms != DRM_MODE_DPMS_ON) {
69325f397a4SDaniel Vetter DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
69425f397a4SDaniel Vetter mode_changed = true;
69525f397a4SDaniel Vetter }
696177cf92dSDaniel Vetter
697177cf92dSDaniel Vetter break;
698f453ba04SDave Airlie }
699f453ba04SDave Airlie }
700f453ba04SDave Airlie
701f453ba04SDave Airlie if (new_encoder != connector->encoder) {
70258367ed6SZhao Yakui DRM_DEBUG_KMS("encoder changed, full mode switch\n");
703712531bfSJesse Barnes mode_changed = true;
704ff846ab7SMaarten Maathuis /* If the encoder is reused for another connector, then
705ff846ab7SMaarten Maathuis * the appropriate crtc will be set later.
706ff846ab7SMaarten Maathuis */
707ff6fdbedSMaarten Maathuis if (connector->encoder)
708ff846ab7SMaarten Maathuis connector->encoder->crtc = NULL;
709f453ba04SDave Airlie connector->encoder = new_encoder;
710f453ba04SDave Airlie }
711f453ba04SDave Airlie }
712b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
713f453ba04SDave Airlie
714f453ba04SDave Airlie if (fail) {
715f453ba04SDave Airlie ret = -EINVAL;
716e67aae79SMaarten Maathuis goto fail;
717f453ba04SDave Airlie }
718f453ba04SDave Airlie
719f453ba04SDave Airlie count = 0;
720b982dab1SThierry Reding drm_connector_list_iter_begin(dev, &conn_iter);
721c36a3254SDaniel Vetter drm_for_each_connector_iter(connector, &conn_iter) {
722f453ba04SDave Airlie if (!connector->encoder)
723f453ba04SDave Airlie continue;
724f453ba04SDave Airlie
725f453ba04SDave Airlie if (connector->encoder->crtc == set->crtc)
726f453ba04SDave Airlie new_crtc = NULL;
727f453ba04SDave Airlie else
728f453ba04SDave Airlie new_crtc = connector->encoder->crtc;
729f453ba04SDave Airlie
730f453ba04SDave Airlie for (ro = 0; ro < set->num_connectors; ro++) {
731f453ba04SDave Airlie if (set->connectors[ro] == connector)
732f453ba04SDave Airlie new_crtc = set->crtc;
733f453ba04SDave Airlie }
7347bec756cSJesse Barnes
7357bec756cSJesse Barnes /* Make sure the new CRTC will work with the encoder */
7367bec756cSJesse Barnes if (new_crtc &&
7377bec756cSJesse Barnes !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
7387bec756cSJesse Barnes ret = -EINVAL;
739b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
740e67aae79SMaarten Maathuis goto fail;
7417bec756cSJesse Barnes }
742f453ba04SDave Airlie if (new_crtc != connector->encoder->crtc) {
74358367ed6SZhao Yakui DRM_DEBUG_KMS("crtc changed, full mode switch\n");
744712531bfSJesse Barnes mode_changed = true;
745f453ba04SDave Airlie connector->encoder->crtc = new_crtc;
746f453ba04SDave Airlie }
7479440106bSJerome Glisse if (new_crtc) {
748fa3ab4c2SVille Syrjälä DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n",
74925933820SJani Nikula connector->base.id, connector->name,
750fa3ab4c2SVille Syrjälä new_crtc->base.id, new_crtc->name);
7519440106bSJerome Glisse } else {
7529440106bSJerome Glisse DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
75325933820SJani Nikula connector->base.id, connector->name);
7549440106bSJerome Glisse }
755f453ba04SDave Airlie }
756b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
757f453ba04SDave Airlie
758f453ba04SDave Airlie /* mode_set_base is not a required function */
759712531bfSJesse Barnes if (fb_changed && !crtc_funcs->mode_set_base)
760712531bfSJesse Barnes mode_changed = true;
761f453ba04SDave Airlie
762712531bfSJesse Barnes if (mode_changed) {
76348b1f5ddSIlija Hadzic if (drm_helper_crtc_in_use(set->crtc)) {
76458367ed6SZhao Yakui DRM_DEBUG_KMS("attempting to set mode from"
76558367ed6SZhao Yakui " userspace\n");
766f453ba04SDave Airlie drm_mode_debug_printmodeline(set->mode);
767f4510a27SMatt Roper set->crtc->primary->fb = set->fb;
768f453ba04SDave Airlie if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
7693c4fdcfbSKristian Høgsberg set->x, set->y,
770bec2eac3SIlija Hadzic save_set.fb)) {
771fa3ab4c2SVille Syrjälä DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n",
772fa3ab4c2SVille Syrjälä set->crtc->base.id, set->crtc->name);
773f4510a27SMatt Roper set->crtc->primary->fb = save_set.fb;
774f453ba04SDave Airlie ret = -EINVAL;
775e67aae79SMaarten Maathuis goto fail;
776f453ba04SDave Airlie }
77725f397a4SDaniel Vetter DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
77825f397a4SDaniel Vetter for (i = 0; i < set->num_connectors; i++) {
77925f397a4SDaniel Vetter DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
78025933820SJani Nikula set->connectors[i]->name);
78125f397a4SDaniel Vetter set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
78225f397a4SDaniel Vetter }
783f453ba04SDave Airlie }
784b182cc59SDaniel Vetter __drm_helper_disable_unused_functions(dev);
785712531bfSJesse Barnes } else if (fb_changed) {
7869b1596afSBen Skeggs set->crtc->x = set->x;
7879b1596afSBen Skeggs set->crtc->y = set->y;
788f4510a27SMatt Roper set->crtc->primary->fb = set->fb;
7895c3b82e2SChris Wilson ret = crtc_funcs->mode_set_base(set->crtc,
790bec2eac3SIlija Hadzic set->x, set->y, save_set.fb);
7910ba41e44SChris Wilson if (ret != 0) {
792fbce4064SIlija Hadzic set->crtc->x = save_set.x;
793fbce4064SIlija Hadzic set->crtc->y = save_set.y;
794f4510a27SMatt Roper set->crtc->primary->fb = save_set.fb;
795e67aae79SMaarten Maathuis goto fail;
796f453ba04SDave Airlie }
7970ba41e44SChris Wilson }
798f453ba04SDave Airlie
79993f55972SPhilipp Zabel kfree(save_connector_encoders);
80093f55972SPhilipp Zabel kfree(save_encoder_crtcs);
801f453ba04SDave Airlie return 0;
802f453ba04SDave Airlie
803e67aae79SMaarten Maathuis fail:
804e67aae79SMaarten Maathuis /* Restore all previous data. */
805f453ba04SDave Airlie count = 0;
8066295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
80793f55972SPhilipp Zabel encoder->crtc = save_encoder_crtcs[count++];
808e62fb64eSChris Wilson }
809e67aae79SMaarten Maathuis
810f453ba04SDave Airlie count = 0;
811b982dab1SThierry Reding drm_connector_list_iter_begin(dev, &conn_iter);
812c36a3254SDaniel Vetter drm_for_each_connector_iter(connector, &conn_iter)
81393f55972SPhilipp Zabel connector->encoder = save_connector_encoders[count++];
814b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
815e67aae79SMaarten Maathuis
816fffc5f59SPhilipp Zabel /* after fail drop reference on all unbound connectors in set, let
817fffc5f59SPhilipp Zabel * bound connectors keep their reference
818fffc5f59SPhilipp Zabel */
8190955c125SDave Airlie for (ro = 0; ro < set->num_connectors; ro++) {
820fffc5f59SPhilipp Zabel if (set->connectors[ro]->encoder)
821fffc5f59SPhilipp Zabel continue;
822ad093607SThierry Reding drm_connector_put(set->connectors[ro]);
8230955c125SDave Airlie }
8240955c125SDave Airlie
825c5006cfeSJesse Barnes /* Try to restore the config */
826c5006cfeSJesse Barnes if (mode_changed &&
827c5006cfeSJesse Barnes !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
828c5006cfeSJesse Barnes save_set.y, save_set.fb))
829c5006cfeSJesse Barnes DRM_ERROR("failed to restore config after modeset failure\n");
830c5006cfeSJesse Barnes
83193f55972SPhilipp Zabel kfree(save_connector_encoders);
83293f55972SPhilipp Zabel kfree(save_encoder_crtcs);
833f453ba04SDave Airlie return ret;
834f453ba04SDave Airlie }
835f453ba04SDave Airlie EXPORT_SYMBOL(drm_crtc_helper_set_config);
836f453ba04SDave Airlie
drm_helper_choose_encoder_dpms(struct drm_encoder * encoder)837c9fb15f6SKeith Packard static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
838c9fb15f6SKeith Packard {
839c9fb15f6SKeith Packard int dpms = DRM_MODE_DPMS_OFF;
840c9fb15f6SKeith Packard struct drm_connector *connector;
841c36a3254SDaniel Vetter struct drm_connector_list_iter conn_iter;
842c9fb15f6SKeith Packard struct drm_device *dev = encoder->dev;
843c9fb15f6SKeith Packard
844b982dab1SThierry Reding drm_connector_list_iter_begin(dev, &conn_iter);
845c36a3254SDaniel Vetter drm_for_each_connector_iter(connector, &conn_iter)
846c9fb15f6SKeith Packard if (connector->encoder == encoder)
847c9fb15f6SKeith Packard if (connector->dpms < dpms)
848c9fb15f6SKeith Packard dpms = connector->dpms;
849b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
850c36a3254SDaniel Vetter
851c9fb15f6SKeith Packard return dpms;
852c9fb15f6SKeith Packard }
853c9fb15f6SKeith Packard
8543b336ec4SSean Paul /* Helper which handles bridge ordering around encoder dpms */
drm_helper_encoder_dpms(struct drm_encoder * encoder,int mode)8553b336ec4SSean Paul static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode)
8563b336ec4SSean Paul {
857be26a66dSJani Nikula const struct drm_encoder_helper_funcs *encoder_funcs;
8583b336ec4SSean Paul
85975229ecaSNoralf Trønnes encoder_funcs = encoder->helper_private;
86075229ecaSNoralf Trønnes if (!encoder_funcs)
86175229ecaSNoralf Trønnes return;
86275229ecaSNoralf Trønnes
8633b336ec4SSean Paul if (encoder_funcs->dpms)
8643b336ec4SSean Paul encoder_funcs->dpms(encoder, mode);
8653b336ec4SSean Paul }
8663b336ec4SSean Paul
drm_helper_choose_crtc_dpms(struct drm_crtc * crtc)867c9fb15f6SKeith Packard static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
868c9fb15f6SKeith Packard {
869c9fb15f6SKeith Packard int dpms = DRM_MODE_DPMS_OFF;
870c9fb15f6SKeith Packard struct drm_connector *connector;
871c36a3254SDaniel Vetter struct drm_connector_list_iter conn_iter;
872c9fb15f6SKeith Packard struct drm_device *dev = crtc->dev;
873c9fb15f6SKeith Packard
874b982dab1SThierry Reding drm_connector_list_iter_begin(dev, &conn_iter);
875c36a3254SDaniel Vetter drm_for_each_connector_iter(connector, &conn_iter)
876c9fb15f6SKeith Packard if (connector->encoder && connector->encoder->crtc == crtc)
877c9fb15f6SKeith Packard if (connector->dpms < dpms)
878c9fb15f6SKeith Packard dpms = connector->dpms;
879b982dab1SThierry Reding drm_connector_list_iter_end(&conn_iter);
880c36a3254SDaniel Vetter
881c9fb15f6SKeith Packard return dpms;
882c9fb15f6SKeith Packard }
883c9fb15f6SKeith Packard
884c9fb15f6SKeith Packard /**
8850d4ed4c8SDaniel Vetter * drm_helper_connector_dpms() - connector dpms helper implementation
8860d4ed4c8SDaniel Vetter * @connector: affected connector
8870d4ed4c8SDaniel Vetter * @mode: DPMS mode
888c9fb15f6SKeith Packard *
8896806cdf9SDaniel Vetter * The drm_helper_connector_dpms() helper function implements the
8906806cdf9SDaniel Vetter * &drm_connector_funcs.dpms callback for drivers using the legacy CRTC
8916806cdf9SDaniel Vetter * helpers.
8922be94971SDaniel Vetter *
8932be94971SDaniel Vetter * This is the main helper function provided by the CRTC helper framework for
8940d4ed4c8SDaniel Vetter * implementing the DPMS connector attribute. It computes the new desired DPMS
8956806cdf9SDaniel Vetter * state for all encoders and CRTCs in the output mesh and calls the
8966806cdf9SDaniel Vetter * &drm_crtc_helper_funcs.dpms and &drm_encoder_helper_funcs.dpms callbacks
8976806cdf9SDaniel Vetter * provided by the driver.
8982be94971SDaniel Vetter *
8992be94971SDaniel Vetter * This function is deprecated. New drivers must implement atomic modeset
900144a7999SDaniel Vetter * support, where DPMS is handled in the DRM core.
9019a69a9acSMaarten Lankhorst *
9029a69a9acSMaarten Lankhorst * Returns:
9039a69a9acSMaarten Lankhorst * Always returns 0.
904c9fb15f6SKeith Packard */
drm_helper_connector_dpms(struct drm_connector * connector,int mode)9059a69a9acSMaarten Lankhorst int drm_helper_connector_dpms(struct drm_connector *connector, int mode)
906c9fb15f6SKeith Packard {
907c9fb15f6SKeith Packard struct drm_encoder *encoder = connector->encoder;
908c9fb15f6SKeith Packard struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
9093b336ec4SSean Paul int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
910c9fb15f6SKeith Packard
9112b5ab0eeSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(connector->dev));
9122b5ab0eeSDaniel Vetter
913c9fb15f6SKeith Packard if (mode == connector->dpms)
9149a69a9acSMaarten Lankhorst return 0;
915c9fb15f6SKeith Packard
916c9fb15f6SKeith Packard old_dpms = connector->dpms;
917c9fb15f6SKeith Packard connector->dpms = mode;
918c9fb15f6SKeith Packard
9193b336ec4SSean Paul if (encoder)
9203b336ec4SSean Paul encoder_dpms = drm_helper_choose_encoder_dpms(encoder);
9213b336ec4SSean Paul
922c9fb15f6SKeith Packard /* from off to on, do crtc then encoder */
923c9fb15f6SKeith Packard if (mode < old_dpms) {
924c9fb15f6SKeith Packard if (crtc) {
925be26a66dSJani Nikula const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
926948de842SSuraj Upadhyay
927c9fb15f6SKeith Packard if (crtc_funcs->dpms)
928c9fb15f6SKeith Packard (*crtc_funcs->dpms) (crtc,
929c9fb15f6SKeith Packard drm_helper_choose_crtc_dpms(crtc));
930c9fb15f6SKeith Packard }
9313b336ec4SSean Paul if (encoder)
9323b336ec4SSean Paul drm_helper_encoder_dpms(encoder, encoder_dpms);
933c9fb15f6SKeith Packard }
934c9fb15f6SKeith Packard
935c9fb15f6SKeith Packard /* from on to off, do encoder then crtc */
936c9fb15f6SKeith Packard if (mode > old_dpms) {
9373b336ec4SSean Paul if (encoder)
9383b336ec4SSean Paul drm_helper_encoder_dpms(encoder, encoder_dpms);
939c9fb15f6SKeith Packard if (crtc) {
940be26a66dSJani Nikula const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
941948de842SSuraj Upadhyay
942c9fb15f6SKeith Packard if (crtc_funcs->dpms)
943c9fb15f6SKeith Packard (*crtc_funcs->dpms) (crtc,
944c9fb15f6SKeith Packard drm_helper_choose_crtc_dpms(crtc));
945c9fb15f6SKeith Packard }
946c9fb15f6SKeith Packard }
947c9fb15f6SKeith Packard
9489a69a9acSMaarten Lankhorst return 0;
949c9fb15f6SKeith Packard }
950c9fb15f6SKeith Packard EXPORT_SYMBOL(drm_helper_connector_dpms);
951c9fb15f6SKeith Packard
9523fcc42e0SDaniel Vetter /**
953aa4cd910SDaniel Vetter * drm_helper_resume_force_mode - force-restore mode setting configuration
954aa4cd910SDaniel Vetter * @dev: drm_device which should be restored
955aa4cd910SDaniel Vetter *
956aa4cd910SDaniel Vetter * Drivers which use the mode setting helpers can use this function to
957aa4cd910SDaniel Vetter * force-restore the mode setting configuration e.g. on resume or when something
958aa4cd910SDaniel Vetter * else might have trampled over the hw state (like some overzealous old BIOSen
959aa4cd910SDaniel Vetter * tended to do).
96000d762cbSDaniel Vetter *
96100d762cbSDaniel Vetter * This helper doesn't provide a error return value since restoring the old
96200d762cbSDaniel Vetter * config should never fail due to resource allocation issues since the driver
96300d762cbSDaniel Vetter * has successfully set the restored configuration already. Hence this should
96400d762cbSDaniel Vetter * boil down to the equivalent of a few dpms on calls, which also don't provide
96500d762cbSDaniel Vetter * an error code.
96600d762cbSDaniel Vetter *
96700d762cbSDaniel Vetter * Drivers where simply restoring an old configuration again might fail (e.g.
96800d762cbSDaniel Vetter * due to slight differences in allocating shared resources when the
96900d762cbSDaniel Vetter * configuration is restored in a different order than when userspace set it up)
97000d762cbSDaniel Vetter * need to use their own restore logic.
97114942760SThierry Reding *
97214942760SThierry Reding * This function is deprecated. New drivers should implement atomic mode-
97314942760SThierry Reding * setting and use the atomic suspend/resume helpers.
97414942760SThierry Reding *
97514942760SThierry Reding * See also:
97614942760SThierry Reding * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
977aa4cd910SDaniel Vetter */
drm_helper_resume_force_mode(struct drm_device * dev)97800d762cbSDaniel Vetter void drm_helper_resume_force_mode(struct drm_device *dev)
979f453ba04SDave Airlie {
980f453ba04SDave Airlie struct drm_crtc *crtc;
98189347bb8SDavid John struct drm_encoder *encoder;
982be26a66dSJani Nikula const struct drm_crtc_helper_funcs *crtc_funcs;
98300d762cbSDaniel Vetter int encoder_dpms;
98400d762cbSDaniel Vetter bool ret;
985f453ba04SDave Airlie
9862b5ab0eeSDaniel Vetter WARN_ON(drm_drv_uses_atomic_modeset(dev));
9872b5ab0eeSDaniel Vetter
98876fd2c37SSean Paul drm_modeset_lock_all(dev);
9896295d607SDaniel Vetter drm_for_each_crtc(crtc, dev) {
990f453ba04SDave Airlie
991f453ba04SDave Airlie if (!crtc->enabled)
992f453ba04SDave Airlie continue;
993f453ba04SDave Airlie
9943c4fdcfbSKristian Høgsberg ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
995f4510a27SMatt Roper crtc->x, crtc->y, crtc->primary->fb);
996f453ba04SDave Airlie
99700d762cbSDaniel Vetter /* Restoring the old config should never fail! */
998f453ba04SDave Airlie if (ret == false)
999f453ba04SDave Airlie DRM_ERROR("failed to set mode on crtc %p\n", crtc);
100089347bb8SDavid John
100189347bb8SDavid John /* Turn off outputs that were already powered off */
100289347bb8SDavid John if (drm_helper_choose_crtc_dpms(crtc)) {
10036295d607SDaniel Vetter drm_for_each_encoder(encoder, dev) {
100489347bb8SDavid John
100589347bb8SDavid John if(encoder->crtc != crtc)
100689347bb8SDavid John continue;
100789347bb8SDavid John
10083b336ec4SSean Paul encoder_dpms = drm_helper_choose_encoder_dpms(
10093b336ec4SSean Paul encoder);
10103b336ec4SSean Paul
10113b336ec4SSean Paul drm_helper_encoder_dpms(encoder, encoder_dpms);
1012817e631eSChris Wilson }
101389347bb8SDavid John
101489347bb8SDavid John crtc_funcs = crtc->helper_private;
101589347bb8SDavid John if (crtc_funcs->dpms)
101689347bb8SDavid John (*crtc_funcs->dpms) (crtc,
101789347bb8SDavid John drm_helper_choose_crtc_dpms(crtc));
101889347bb8SDavid John }
101989347bb8SDavid John }
102000d762cbSDaniel Vetter
1021af4fcb57SZhao Yakui /* disable the unused connectors while restoring the modesetting */
1022b182cc59SDaniel Vetter __drm_helper_disable_unused_functions(dev);
102376fd2c37SSean Paul drm_modeset_unlock_all(dev);
1024f453ba04SDave Airlie }
1025f453ba04SDave Airlie EXPORT_SYMBOL(drm_helper_resume_force_mode);
1026c2d88e06SDaniel Vetter
1027c2d88e06SDaniel Vetter /**
1028c2d88e06SDaniel Vetter * drm_helper_force_disable_all - Forcibly turn off all enabled CRTCs
1029c2d88e06SDaniel Vetter * @dev: DRM device whose CRTCs to turn off
1030c2d88e06SDaniel Vetter *
1031c2d88e06SDaniel Vetter * Drivers may want to call this on unload to ensure that all displays are
1032c2d88e06SDaniel Vetter * unlit and the GPU is in a consistent, low power state. Takes modeset locks.
1033c2d88e06SDaniel Vetter *
1034c2d88e06SDaniel Vetter * Note: This should only be used by non-atomic legacy drivers. For an atomic
1035c2d88e06SDaniel Vetter * version look at drm_atomic_helper_shutdown().
1036c2d88e06SDaniel Vetter *
1037c2d88e06SDaniel Vetter * Returns:
1038c2d88e06SDaniel Vetter * Zero on success, error code on failure.
1039c2d88e06SDaniel Vetter */
drm_helper_force_disable_all(struct drm_device * dev)1040c2d88e06SDaniel Vetter int drm_helper_force_disable_all(struct drm_device *dev)
1041c2d88e06SDaniel Vetter {
1042c2d88e06SDaniel Vetter struct drm_crtc *crtc;
1043c2d88e06SDaniel Vetter int ret = 0;
1044c2d88e06SDaniel Vetter
104576fd2c37SSean Paul drm_modeset_lock_all(dev);
1046c2d88e06SDaniel Vetter drm_for_each_crtc(crtc, dev)
1047c2d88e06SDaniel Vetter if (crtc->enabled) {
1048c2d88e06SDaniel Vetter struct drm_mode_set set = {
1049c2d88e06SDaniel Vetter .crtc = crtc,
1050c2d88e06SDaniel Vetter };
1051c2d88e06SDaniel Vetter
1052c2d88e06SDaniel Vetter ret = drm_mode_set_config_internal(&set);
1053c2d88e06SDaniel Vetter if (ret)
1054c2d88e06SDaniel Vetter goto out;
1055c2d88e06SDaniel Vetter }
1056c2d88e06SDaniel Vetter out:
105776fd2c37SSean Paul drm_modeset_unlock_all(dev);
1058c2d88e06SDaniel Vetter return ret;
1059c2d88e06SDaniel Vetter }
1060c2d88e06SDaniel Vetter EXPORT_SYMBOL(drm_helper_force_disable_all);
1061