2008-11-08 06:05:41 +08:00
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/*
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* Copyright (c) 2006-2008 Intel Corporation
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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*
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* DRM core CRTC related functions
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*
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* Authors:
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* Keith Packard
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* Eric Anholt <eric@anholt.net>
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* Dave Airlie <airlied@linux.ie>
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* Jesse Barnes <jesse.barnes@intel.com>
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*/
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2011-08-31 06:16:33 +08:00
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#include <linux/export.h>
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2011-08-31 23:29:09 +08:00
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#include <linux/moduleparam.h>
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2011-08-31 06:16:33 +08:00
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2012-10-03 01:01:07 +08:00
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_edid.h>
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2008-11-08 06:05:41 +08:00
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2013-10-08 23:44:47 +08:00
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MODULE_AUTHOR("David Airlie, Jesse Barnes");
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MODULE_DESCRIPTION("DRM KMS helper");
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MODULE_LICENSE("GPL and additional rights");
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2012-11-01 21:45:16 +08:00
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/**
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* drm_helper_move_panel_connectors_to_head() - move panels to the front in the
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* connector list
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* @dev: drm device to operate on
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*
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* Some userspace presumes that the first connected connector is the main
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* display, where it's supposed to display e.g. the login screen. For
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* laptops, this should be the main panel. Use this function to sort all
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* (eDP/LVDS) panels to the front of the connector list, instead of
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* painstakingly trying to initialize them in the right order.
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*/
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2012-10-27 21:52:04 +08:00
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void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
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{
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struct drm_connector *connector, *tmp;
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struct list_head panel_list;
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INIT_LIST_HEAD(&panel_list);
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list_for_each_entry_safe(connector, tmp,
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&dev->mode_config.connector_list, head) {
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if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
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connector->connector_type == DRM_MODE_CONNECTOR_eDP)
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list_move_tail(&connector->head, &panel_list);
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}
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list_splice(&panel_list, &dev->mode_config.connector_list);
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}
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EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
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2009-05-31 11:42:28 +08:00
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/**
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* drm_helper_encoder_in_use - check if a given encoder is in use
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* @encoder: encoder to check
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*
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2014-01-24 05:58:26 +08:00
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* Checks whether @encoder is with the current mode setting output configuration
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* in use by any connector. This doesn't mean that it is actually enabled since
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* the DPMS state is tracked separately.
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2009-05-31 11:42:28 +08:00
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*
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2014-01-24 05:58:26 +08:00
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* Returns:
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* True if @encoder is used, false otherwise.
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2009-05-31 11:42:28 +08:00
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*/
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bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
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{
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struct drm_connector *connector;
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struct drm_device *dev = encoder->dev;
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2014-01-24 05:18:47 +08:00
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WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
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2009-05-31 11:42:28 +08:00
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list_for_each_entry(connector, &dev->mode_config.connector_list, head)
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if (connector->encoder == encoder)
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return true;
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return false;
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}
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EXPORT_SYMBOL(drm_helper_encoder_in_use);
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2008-11-08 06:05:41 +08:00
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/**
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* drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
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* @crtc: CRTC to check
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*
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2014-01-24 05:58:26 +08:00
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* Checks whether @crtc is with the current mode setting output configuration
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* in use by any connector. This doesn't mean that it is actually enabled since
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* the DPMS state is tracked separately.
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2008-11-08 06:05:41 +08:00
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*
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2014-01-24 05:58:26 +08:00
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* Returns:
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* True if @crtc is used, false otherwise.
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2008-11-08 06:05:41 +08:00
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*/
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bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
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{
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struct drm_encoder *encoder;
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struct drm_device *dev = crtc->dev;
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2014-01-24 05:18:47 +08:00
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WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
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2008-11-08 06:05:41 +08:00
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
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2009-05-31 11:42:28 +08:00
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if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
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2008-11-08 06:05:41 +08:00
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return true;
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return false;
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}
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EXPORT_SYMBOL(drm_helper_crtc_in_use);
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2010-07-01 14:49:57 +08:00
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static void
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drm_encoder_disable(struct drm_encoder *encoder)
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{
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struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
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2013-08-15 04:47:37 +08:00
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if (encoder->bridge)
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encoder->bridge->funcs->disable(encoder->bridge);
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2010-07-01 14:49:57 +08:00
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if (encoder_funcs->disable)
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(*encoder_funcs->disable)(encoder);
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else
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(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
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2013-08-15 04:47:37 +08:00
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if (encoder->bridge)
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encoder->bridge->funcs->post_disable(encoder->bridge);
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2010-07-01 14:49:57 +08:00
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}
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2014-03-20 21:26:34 +08:00
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static void __drm_helper_disable_unused_functions(struct drm_device *dev)
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2008-11-08 06:05:41 +08:00
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{
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struct drm_encoder *encoder;
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struct drm_crtc *crtc;
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2014-01-24 05:18:47 +08:00
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drm_warn_on_modeset_not_all_locked(dev);
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2008-11-08 06:05:41 +08:00
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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2010-12-21 10:47:56 +08:00
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if (!drm_helper_encoder_in_use(encoder)) {
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2010-07-01 14:49:57 +08:00
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drm_encoder_disable(encoder);
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2014-05-25 02:30:10 +08:00
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/* disconnect encoder from any connector */
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2009-09-02 12:00:11 +08:00
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encoder->crtc = NULL;
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2009-08-31 13:16:30 +08:00
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}
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2008-11-08 06:05:41 +08:00
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}
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
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crtc->enabled = drm_helper_crtc_in_use(crtc);
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if (!crtc->enabled) {
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2010-06-12 05:04:35 +08:00
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if (crtc_funcs->disable)
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(*crtc_funcs->disable)(crtc);
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else
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(*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
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2014-04-02 06:22:40 +08:00
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crtc->primary->fb = NULL;
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2008-11-08 06:05:41 +08:00
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}
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}
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}
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2014-03-20 21:26:34 +08:00
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/**
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* drm_helper_disable_unused_functions - disable unused objects
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* @dev: DRM device
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*
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* This function walks through the entire mode setting configuration of @dev. It
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* will remove any crtc links of unused encoders and encoder links of
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* disconnected connectors. Then it will disable all unused encoders and crtcs
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* either by calling their disable callback if available or by calling their
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* dpms callback with DRM_MODE_DPMS_OFF.
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*/
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void drm_helper_disable_unused_functions(struct drm_device *dev)
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{
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drm_modeset_lock_all(dev);
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__drm_helper_disable_unused_functions(dev);
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drm_modeset_unlock_all(dev);
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}
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2008-11-08 06:05:41 +08:00
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EXPORT_SYMBOL(drm_helper_disable_unused_functions);
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2009-02-24 08:09:34 +08:00
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/*
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* Check the CRTC we're going to map each output to vs. its current
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* CRTC. If they don't match, we have to disable the output and the CRTC
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* since the driver will have to re-route things.
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*/
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static void
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drm_crtc_prepare_encoders(struct drm_device *dev)
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{
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struct drm_encoder_helper_funcs *encoder_funcs;
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struct drm_encoder *encoder;
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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encoder_funcs = encoder->helper_private;
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/* Disable unused encoders */
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if (encoder->crtc == NULL)
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2010-07-01 14:49:57 +08:00
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drm_encoder_disable(encoder);
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2009-02-24 08:09:34 +08:00
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/* Disable encoders whose CRTC is about to change */
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if (encoder_funcs->get_crtc &&
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encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
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2010-07-01 14:49:57 +08:00
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drm_encoder_disable(encoder);
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2009-02-24 08:09:34 +08:00
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}
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}
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2008-11-08 06:05:41 +08:00
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/**
|
2012-11-01 21:45:16 +08:00
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* drm_crtc_helper_set_mode - internal helper to set a mode
|
2008-11-08 06:05:41 +08:00
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* @crtc: CRTC to program
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* @mode: mode to use
|
2012-11-10 01:26:32 +08:00
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* @x: horizontal offset into the surface
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* @y: vertical offset into the surface
|
2012-11-01 21:45:16 +08:00
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* @old_fb: old framebuffer, for cleanup
|
2008-11-08 06:05:41 +08:00
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*
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* Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
|
2012-11-01 21:45:16 +08:00
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* to fixup or reject the mode prior to trying to set it. This is an internal
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* helper that drivers could e.g. use to update properties that require the
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* entire output pipe to be disabled and re-enabled in a new configuration. For
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* example for changing whether audio is enabled on a hdmi link or for changing
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* panel fitter or dither attributes. It is also called by the
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* drm_crtc_helper_set_config() helper function to drive the mode setting
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* sequence.
|
2008-11-08 06:05:41 +08:00
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*
|
2014-01-24 05:58:26 +08:00
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* Returns:
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* True if the mode was set successfully, false otherwise.
|
2008-11-08 06:05:41 +08:00
|
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*/
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bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
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struct drm_display_mode *mode,
|
2008-12-18 11:14:46 +08:00
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int x, int y,
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struct drm_framebuffer *old_fb)
|
2008-11-08 06:05:41 +08:00
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{
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struct drm_device *dev = crtc->dev;
|
2013-10-29 23:09:44 +08:00
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struct drm_display_mode *adjusted_mode, saved_mode;
|
2008-11-08 06:05:41 +08:00
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struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
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|
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struct drm_encoder_helper_funcs *encoder_funcs;
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int saved_x, saved_y;
|
2013-10-29 23:09:44 +08:00
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bool saved_enabled;
|
2008-11-08 06:05:41 +08:00
|
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struct drm_encoder *encoder;
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|
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bool ret = true;
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|
|
2014-01-24 05:18:47 +08:00
|
|
|
drm_warn_on_modeset_not_all_locked(dev);
|
|
|
|
|
2013-10-29 23:09:44 +08:00
|
|
|
saved_enabled = crtc->enabled;
|
2008-11-08 06:05:41 +08:00
|
|
|
crtc->enabled = drm_helper_crtc_in_use(crtc);
|
|
|
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if (!crtc->enabled)
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|
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return true;
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|
|
|
|
2011-01-28 19:31:56 +08:00
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|
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adjusted_mode = drm_mode_duplicate(dev, mode);
|
2013-10-29 23:09:44 +08:00
|
|
|
if (!adjusted_mode) {
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|
|
|
crtc->enabled = saved_enabled;
|
2012-03-13 18:35:48 +08:00
|
|
|
return false;
|
2013-10-29 23:09:44 +08:00
|
|
|
}
|
2011-01-28 19:31:56 +08:00
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
saved_mode = crtc->mode;
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|
|
|
saved_x = crtc->x;
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|
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saved_y = crtc->y;
|
|
|
|
|
|
|
|
/* Update crtc values up front so the driver can rely on them for mode
|
|
|
|
* setting.
|
|
|
|
*/
|
|
|
|
crtc->mode = *mode;
|
|
|
|
crtc->x = x;
|
|
|
|
crtc->y = y;
|
|
|
|
|
|
|
|
/* Pass our mode to the connectors and the CRTC to give them a chance to
|
|
|
|
* adjust it according to limitations or connector properties, and also
|
|
|
|
* a chance to reject the mode entirely.
|
|
|
|
*/
|
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|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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|
|
|
|
|
|
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if (encoder->crtc != crtc)
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|
|
continue;
|
2013-08-15 04:47:37 +08:00
|
|
|
|
|
|
|
if (encoder->bridge && encoder->bridge->funcs->mode_fixup) {
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|
|
|
ret = encoder->bridge->funcs->mode_fixup(
|
|
|
|
encoder->bridge, mode, adjusted_mode);
|
|
|
|
if (!ret) {
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|
|
DRM_DEBUG_KMS("Bridge fixup failed\n");
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|
|
goto done;
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|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
encoder_funcs = encoder->helper_private;
|
|
|
|
if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
|
|
|
|
adjusted_mode))) {
|
2011-10-11 04:21:27 +08:00
|
|
|
DRM_DEBUG_KMS("Encoder fixup failed\n");
|
2008-11-08 06:05:41 +08:00
|
|
|
goto done;
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|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
|
2011-10-11 04:21:27 +08:00
|
|
|
DRM_DEBUG_KMS("CRTC fixup failed\n");
|
2008-11-08 06:05:41 +08:00
|
|
|
goto done;
|
|
|
|
}
|
2010-07-16 03:43:25 +08:00
|
|
|
DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
|
2008-11-08 06:05:41 +08:00
|
|
|
|
|
|
|
/* Prepare the encoders and CRTCs before setting the mode. */
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
|
|
|
|
if (encoder->crtc != crtc)
|
|
|
|
continue;
|
2013-08-15 04:47:37 +08:00
|
|
|
|
|
|
|
if (encoder->bridge)
|
|
|
|
encoder->bridge->funcs->disable(encoder->bridge);
|
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
encoder_funcs = encoder->helper_private;
|
|
|
|
/* Disable the encoders as the first thing we do. */
|
|
|
|
encoder_funcs->prepare(encoder);
|
2013-08-15 04:47:37 +08:00
|
|
|
|
|
|
|
if (encoder->bridge)
|
|
|
|
encoder->bridge->funcs->post_disable(encoder->bridge);
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
|
2009-02-24 08:09:34 +08:00
|
|
|
drm_crtc_prepare_encoders(dev);
|
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
crtc_funcs->prepare(crtc);
|
|
|
|
|
|
|
|
/* Set up the DPLL and any encoders state that needs to adjust or depend
|
|
|
|
* on the DPLL.
|
|
|
|
*/
|
2009-02-11 21:25:09 +08:00
|
|
|
ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
|
|
|
|
if (!ret)
|
|
|
|
goto done;
|
2008-11-08 06:05:41 +08:00
|
|
|
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
|
|
|
|
if (encoder->crtc != crtc)
|
|
|
|
continue;
|
|
|
|
|
2010-07-16 03:43:25 +08:00
|
|
|
DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
|
|
|
|
encoder->base.id, drm_get_encoder_name(encoder),
|
|
|
|
mode->base.id, mode->name);
|
2008-11-08 06:05:41 +08:00
|
|
|
encoder_funcs = encoder->helper_private;
|
|
|
|
encoder_funcs->mode_set(encoder, mode, adjusted_mode);
|
2013-08-15 04:47:37 +08:00
|
|
|
|
|
|
|
if (encoder->bridge && encoder->bridge->funcs->mode_set)
|
|
|
|
encoder->bridge->funcs->mode_set(encoder->bridge, mode,
|
|
|
|
adjusted_mode);
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Now enable the clocks, plane, pipe, and connectors that we set up. */
|
|
|
|
crtc_funcs->commit(crtc);
|
|
|
|
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
|
|
|
|
if (encoder->crtc != crtc)
|
|
|
|
continue;
|
|
|
|
|
2013-08-15 04:47:37 +08:00
|
|
|
if (encoder->bridge)
|
|
|
|
encoder->bridge->funcs->pre_enable(encoder->bridge);
|
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
encoder_funcs = encoder->helper_private;
|
|
|
|
encoder_funcs->commit(encoder);
|
|
|
|
|
2013-08-15 04:47:37 +08:00
|
|
|
if (encoder->bridge)
|
|
|
|
encoder->bridge->funcs->enable(encoder->bridge);
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
|
drm/vblank: Add support for precise vblank timestamping.
The DRI2 swap & sync implementation needs precise
vblank counts and precise timestamps corresponding
to those vblank counts. For conformance to the OpenML
OML_sync_control extension specification the DRM
timestamp associated with a vblank count should
correspond to the start of video scanout of the first
scanline of the video frame following the vblank
interval for that vblank count.
Therefore we need to carry around precise timestamps
for vblanks. Currently the DRM and KMS drivers generate
timestamps ad-hoc via do_gettimeofday() in some
places. The resulting timestamps are sometimes not
very precise due to interrupt handling delays, they
don't conform to OML_sync_control and some are wrong,
as they aren't taken synchronized to the vblank.
This patch implements support inside the drm core
for precise and robust timestamping. It consists
of the following interrelated pieces.
1. Vblank timestamp caching:
A per-crtc ringbuffer stores the most recent vblank
timestamps corresponding to vblank counts.
The ringbuffer can be read out lock-free via the
accessor function:
struct timeval timestamp;
vblankcount = drm_vblank_count_and_time(dev, crtcid, ×tamp).
The function returns the current vblank count and
the corresponding timestamp for start of video
scanout following the vblank interval. It can be
used anywhere between enclosing drm_vblank_get(dev, crtcid)
and drm_vblank_put(dev,crtcid) statements. It is used
inside the drmWaitVblank ioctl and in the vblank event
queueing and handling. It should be used by kms drivers for
timestamping of bufferswap completion.
The timestamp ringbuffer is reinitialized each time
vblank irq's get reenabled in drm_vblank_get()/
drm_update_vblank_count(). It is invalidated when
vblank irq's get disabled.
The ringbuffer is updated inside drm_handle_vblank()
at each vblank irq.
2. Calculation of precise vblank timestamps:
drm_get_last_vbltimestamp() is used to compute the
timestamp for the end of the most recent vblank (if
inside active scanout), or the expected end of the
current vblank interval (if called inside a vblank
interval). The function calls into a new optional kms
driver entry point dev->driver->get_vblank_timestamp()
which is supposed to provide the precise timestamp.
If a kms driver doesn't implement the entry point or
if the call fails, a simple do_gettimeofday() timestamp
is returned as crude approximation of the true vblank time.
A new drm module parameter drm.timestamp_precision_usec
allows to disable high precision timestamps (if set to
zero) or to specify the maximum acceptable error in
the timestamps in microseconds.
Kms drivers could implement their get_vblank_timestamp()
function in a gpu specific way, as long as returned
timestamps conform to OML_sync_control, e.g., by use
of gpu specific hardware timestamps.
Optionally, kms drivers can simply wrap and use the new
utility function drm_calc_vbltimestamp_from_scanoutpos().
This function calls a new optional kms driver function
dev->driver->get_scanout_position() which returns the
current horizontal and vertical video scanout position
of the crtc. The scanout position together with the
drm_display_timing of the current video mode is used
to calculate elapsed time relative to start of active scanout
for the current video frame. This elapsed time is subtracted
from the current do_gettimeofday() time to get the timestamp
corresponding to start of video scanout. Currently
non-interlaced, non-doublescan video modes, with or
without panel scaling are handled correctly. Interlaced/
doublescan modes are tbd in a future patch.
3. Filtering of redundant vblank irq's and removal of
some race-conditions in the vblank irq enable/disable path:
Some gpu's (e.g., Radeon R500/R600) send spurious vblank
irq's outside the vblank if vblank irq's get reenabled.
These get detected by use of the vblank timestamps and
filtered out to avoid miscounting of vblanks.
Some race-conditions between the vblank irq enable/disable
functions, the vblank irq handler and the gpu itself (updating
its hardware vblank counter in the "wrong" moment) are
fixed inside vblank_disable_and_save() and
drm_update_vblank_count() by use of the vblank timestamps and
a new spinlock dev->vblank_time_lock.
The time until vblank irq disable is now configurable via
a new drm module parameter drm.vblankoffdelay to allow
experimentation with timeouts that are much shorter than
the current 5 seconds and should allow longer vblank off
periods for better power savings.
Followup patches will use these new functions to
implement precise timestamping for the intel and radeon
kms drivers.
Signed-off-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-23 10:20:23 +08:00
|
|
|
/* Store real post-adjustment hardware mode. */
|
|
|
|
crtc->hwmode = *adjusted_mode;
|
|
|
|
|
|
|
|
/* Calculate and store various constants which
|
|
|
|
* are later needed by vblank and swap-completion
|
|
|
|
* timestamping. They are derived from true hwmode.
|
|
|
|
*/
|
2013-10-26 22:16:30 +08:00
|
|
|
drm_calc_timestamping_constants(crtc, &crtc->hwmode);
|
drm/vblank: Add support for precise vblank timestamping.
The DRI2 swap & sync implementation needs precise
vblank counts and precise timestamps corresponding
to those vblank counts. For conformance to the OpenML
OML_sync_control extension specification the DRM
timestamp associated with a vblank count should
correspond to the start of video scanout of the first
scanline of the video frame following the vblank
interval for that vblank count.
Therefore we need to carry around precise timestamps
for vblanks. Currently the DRM and KMS drivers generate
timestamps ad-hoc via do_gettimeofday() in some
places. The resulting timestamps are sometimes not
very precise due to interrupt handling delays, they
don't conform to OML_sync_control and some are wrong,
as they aren't taken synchronized to the vblank.
This patch implements support inside the drm core
for precise and robust timestamping. It consists
of the following interrelated pieces.
1. Vblank timestamp caching:
A per-crtc ringbuffer stores the most recent vblank
timestamps corresponding to vblank counts.
The ringbuffer can be read out lock-free via the
accessor function:
struct timeval timestamp;
vblankcount = drm_vblank_count_and_time(dev, crtcid, ×tamp).
The function returns the current vblank count and
the corresponding timestamp for start of video
scanout following the vblank interval. It can be
used anywhere between enclosing drm_vblank_get(dev, crtcid)
and drm_vblank_put(dev,crtcid) statements. It is used
inside the drmWaitVblank ioctl and in the vblank event
queueing and handling. It should be used by kms drivers for
timestamping of bufferswap completion.
The timestamp ringbuffer is reinitialized each time
vblank irq's get reenabled in drm_vblank_get()/
drm_update_vblank_count(). It is invalidated when
vblank irq's get disabled.
The ringbuffer is updated inside drm_handle_vblank()
at each vblank irq.
2. Calculation of precise vblank timestamps:
drm_get_last_vbltimestamp() is used to compute the
timestamp for the end of the most recent vblank (if
inside active scanout), or the expected end of the
current vblank interval (if called inside a vblank
interval). The function calls into a new optional kms
driver entry point dev->driver->get_vblank_timestamp()
which is supposed to provide the precise timestamp.
If a kms driver doesn't implement the entry point or
if the call fails, a simple do_gettimeofday() timestamp
is returned as crude approximation of the true vblank time.
A new drm module parameter drm.timestamp_precision_usec
allows to disable high precision timestamps (if set to
zero) or to specify the maximum acceptable error in
the timestamps in microseconds.
Kms drivers could implement their get_vblank_timestamp()
function in a gpu specific way, as long as returned
timestamps conform to OML_sync_control, e.g., by use
of gpu specific hardware timestamps.
Optionally, kms drivers can simply wrap and use the new
utility function drm_calc_vbltimestamp_from_scanoutpos().
This function calls a new optional kms driver function
dev->driver->get_scanout_position() which returns the
current horizontal and vertical video scanout position
of the crtc. The scanout position together with the
drm_display_timing of the current video mode is used
to calculate elapsed time relative to start of active scanout
for the current video frame. This elapsed time is subtracted
from the current do_gettimeofday() time to get the timestamp
corresponding to start of video scanout. Currently
non-interlaced, non-doublescan video modes, with or
without panel scaling are handled correctly. Interlaced/
doublescan modes are tbd in a future patch.
3. Filtering of redundant vblank irq's and removal of
some race-conditions in the vblank irq enable/disable path:
Some gpu's (e.g., Radeon R500/R600) send spurious vblank
irq's outside the vblank if vblank irq's get reenabled.
These get detected by use of the vblank timestamps and
filtered out to avoid miscounting of vblanks.
Some race-conditions between the vblank irq enable/disable
functions, the vblank irq handler and the gpu itself (updating
its hardware vblank counter in the "wrong" moment) are
fixed inside vblank_disable_and_save() and
drm_update_vblank_count() by use of the vblank timestamps and
a new spinlock dev->vblank_time_lock.
The time until vblank irq disable is now configurable via
a new drm module parameter drm.vblankoffdelay to allow
experimentation with timeouts that are much shorter than
the current 5 seconds and should allow longer vblank off
periods for better power savings.
Followup patches will use these new functions to
implement precise timestamping for the intel and radeon
kms drivers.
Signed-off-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-10-23 10:20:23 +08:00
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
/* FIXME: add subpixel order */
|
|
|
|
done:
|
2011-01-28 19:31:56 +08:00
|
|
|
drm_mode_destroy(dev, adjusted_mode);
|
2008-11-08 06:05:41 +08:00
|
|
|
if (!ret) {
|
2013-10-29 23:09:44 +08:00
|
|
|
crtc->enabled = saved_enabled;
|
2008-11-08 06:05:41 +08:00
|
|
|
crtc->mode = saved_mode;
|
|
|
|
crtc->x = saved_x;
|
|
|
|
crtc->y = saved_y;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_crtc_helper_set_mode);
|
|
|
|
|
2014-04-29 17:44:39 +08:00
|
|
|
static void
|
2011-11-29 05:10:05 +08:00
|
|
|
drm_crtc_helper_disable(struct drm_crtc *crtc)
|
|
|
|
{
|
|
|
|
struct drm_device *dev = crtc->dev;
|
|
|
|
struct drm_connector *connector;
|
|
|
|
struct drm_encoder *encoder;
|
|
|
|
|
|
|
|
/* Decouple all encoders and their attached connectors from this crtc */
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
|
|
if (connector->encoder != encoder)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
connector->encoder = NULL;
|
drm: Track the proper DPMS mode of connectors
When userspace removes the active framebuffer using DRM_IOCTL_MODE_RMFB,
or explicitly disables the CRTC (by calling drmModeSetCrtc(..., NULL)
for example), a NULL framebuffer will be passed to the .set_config()
implementation of a CRTC. The drm_crtc_helper_set_config() helper will
decide to disable a CRTC when that happens.
To do so, it calls drm_crtc_helper_disable(), which in turn will iterate
over all encoders and decouple them from their connectors and finally
call drm_helper_disable_unused_functions() to clean up and call the
.disable() or .dpms() implementation for each encoder. However, at no
point during this sequence does it track the DPMS mode of a connector,
so it will usually remain on after this.
When a connector is enabled again, drm_helper_connector_dpms() will not
notice that the DPMS mode actually changed and won't do anything, which
causes the connector to stay disabled indefinitely.
To prevent this from happening, explicitly set the connector's DPMS mode
to off when the CRTC is disabled. That way it reflects the correct state
and can be enabled again.
This solves an issue observed when terminating an X server running on
the xf86-video-modesetting driver. Without this patch, the connector
would not be enabled properly and the screen would stay dark.
Acked-by: David Airlie <airlied@linux.ie>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-02 21:50:06 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* drm_helper_disable_unused_functions() ought to be
|
|
|
|
* doing this, but since we've decoupled the encoder
|
|
|
|
* from the connector above, the required connection
|
|
|
|
* between them is henceforth no longer available.
|
|
|
|
*/
|
|
|
|
connector->dpms = DRM_MODE_DPMS_OFF;
|
2011-11-29 05:10:05 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-20 21:26:34 +08:00
|
|
|
__drm_helper_disable_unused_functions(dev);
|
2011-11-29 05:10:05 +08:00
|
|
|
}
|
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
/**
|
|
|
|
* drm_crtc_helper_set_config - set a new config from userspace
|
2012-11-01 21:45:16 +08:00
|
|
|
* @set: mode set configuration
|
2008-11-08 06:05:41 +08:00
|
|
|
*
|
2012-11-01 21:45:16 +08:00
|
|
|
* Setup a new configuration, provided by the upper layers (either an ioctl call
|
2014-02-18 21:54:36 +08:00
|
|
|
* from userspace or internally e.g. from the fbdev support code) in @set, and
|
2012-11-01 21:45:16 +08:00
|
|
|
* enable it. This is the main helper functions for drivers that implement
|
|
|
|
* kernel mode setting with the crtc helper functions and the assorted
|
|
|
|
* ->prepare(), ->modeset() and ->commit() helper callbacks.
|
2008-11-08 06:05:41 +08:00
|
|
|
*
|
2014-01-24 05:58:26 +08:00
|
|
|
* Returns:
|
|
|
|
* Returns 0 on success, negative errno numbers on failure.
|
2008-11-08 06:05:41 +08:00
|
|
|
*/
|
|
|
|
int drm_crtc_helper_set_config(struct drm_mode_set *set)
|
|
|
|
{
|
|
|
|
struct drm_device *dev;
|
2013-10-29 23:09:46 +08:00
|
|
|
struct drm_crtc *new_crtc;
|
2009-08-27 16:18:29 +08:00
|
|
|
struct drm_encoder *save_encoders, *new_encoder, *encoder;
|
2009-08-03 20:43:59 +08:00
|
|
|
bool mode_changed = false; /* if true do a full mode set */
|
|
|
|
bool fb_changed = false; /* if true and !mode_changed just do a flip */
|
2009-08-27 16:18:29 +08:00
|
|
|
struct drm_connector *save_connectors, *connector;
|
2008-11-08 06:05:41 +08:00
|
|
|
int count = 0, ro, fail = 0;
|
|
|
|
struct drm_crtc_helper_funcs *crtc_funcs;
|
2011-11-08 02:39:57 +08:00
|
|
|
struct drm_mode_set save_set;
|
2012-05-17 19:27:21 +08:00
|
|
|
int ret;
|
2010-11-27 02:45:58 +08:00
|
|
|
int i;
|
2008-11-08 06:05:41 +08:00
|
|
|
|
2009-07-20 13:48:07 +08:00
|
|
|
DRM_DEBUG_KMS("\n");
|
2008-11-08 06:05:41 +08:00
|
|
|
|
2013-06-15 06:13:11 +08:00
|
|
|
BUG_ON(!set);
|
|
|
|
BUG_ON(!set->crtc);
|
|
|
|
BUG_ON(!set->crtc->helper_private);
|
2008-11-08 06:05:41 +08:00
|
|
|
|
2013-06-15 06:13:11 +08:00
|
|
|
/* Enforce sane interface api - has been abused by the fb helper. */
|
|
|
|
BUG_ON(!set->mode && set->fb);
|
|
|
|
BUG_ON(set->fb && set->num_connectors == 0);
|
2008-11-08 06:05:41 +08:00
|
|
|
|
|
|
|
crtc_funcs = set->crtc->helper_private;
|
|
|
|
|
2011-01-31 19:16:33 +08:00
|
|
|
if (!set->mode)
|
|
|
|
set->fb = NULL;
|
|
|
|
|
2010-07-16 03:43:25 +08:00
|
|
|
if (set->fb) {
|
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
|
|
|
|
set->crtc->base.id, set->fb->base.id,
|
|
|
|
(int)set->num_connectors, set->x, set->y);
|
|
|
|
} else {
|
2011-01-31 19:16:33 +08:00
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
|
2014-04-29 17:44:39 +08:00
|
|
|
drm_crtc_helper_disable(set->crtc);
|
|
|
|
return 0;
|
2010-07-16 03:43:25 +08:00
|
|
|
}
|
2008-11-08 06:05:41 +08:00
|
|
|
|
|
|
|
dev = set->crtc->dev;
|
|
|
|
|
2014-01-24 05:18:47 +08:00
|
|
|
drm_warn_on_modeset_not_all_locked(dev);
|
|
|
|
|
2013-10-29 23:09:46 +08:00
|
|
|
/*
|
|
|
|
* Allocate space for the backup of all (non-pointer) encoder and
|
|
|
|
* connector data.
|
|
|
|
*/
|
2009-08-27 16:18:29 +08:00
|
|
|
save_encoders = kzalloc(dev->mode_config.num_encoder *
|
|
|
|
sizeof(struct drm_encoder), GFP_KERNEL);
|
2013-10-29 23:09:46 +08:00
|
|
|
if (!save_encoders)
|
2008-11-08 06:05:41 +08:00
|
|
|
return -ENOMEM;
|
|
|
|
|
2009-08-27 16:18:29 +08:00
|
|
|
save_connectors = kzalloc(dev->mode_config.num_connector *
|
|
|
|
sizeof(struct drm_connector), GFP_KERNEL);
|
|
|
|
if (!save_connectors) {
|
|
|
|
kfree(save_encoders);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2013-10-29 23:09:46 +08:00
|
|
|
/*
|
|
|
|
* Copy data. Note that driver private data is not affected.
|
2009-08-27 16:18:29 +08:00
|
|
|
* Should anything bad happen only the expected state is
|
|
|
|
* restored, not the drivers personal bookkeeping.
|
|
|
|
*/
|
|
|
|
count = 0;
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
save_encoders[count++] = *encoder;
|
|
|
|
}
|
|
|
|
|
|
|
|
count = 0;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
|
|
save_connectors[count++] = *connector;
|
|
|
|
}
|
|
|
|
|
2011-11-08 02:39:57 +08:00
|
|
|
save_set.crtc = set->crtc;
|
|
|
|
save_set.mode = &set->crtc->mode;
|
|
|
|
save_set.x = set->crtc->x;
|
|
|
|
save_set.y = set->crtc->y;
|
2014-04-02 06:22:40 +08:00
|
|
|
save_set.fb = set->crtc->primary->fb;
|
2011-11-08 02:39:57 +08:00
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
/* We should be able to check here if the fb has the same properties
|
|
|
|
* and then just flip_or_move it */
|
2014-04-02 06:22:40 +08:00
|
|
|
if (set->crtc->primary->fb != set->fb) {
|
2009-01-10 05:56:14 +08:00
|
|
|
/* If we have no fb then treat it as a full mode set */
|
2014-04-02 06:22:40 +08:00
|
|
|
if (set->crtc->primary->fb == NULL) {
|
2009-07-20 13:48:07 +08:00
|
|
|
DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
|
2009-01-10 05:56:14 +08:00
|
|
|
mode_changed = true;
|
2009-08-03 20:43:59 +08:00
|
|
|
} else if (set->fb == NULL) {
|
|
|
|
mode_changed = true;
|
2013-04-22 07:38:47 +08:00
|
|
|
} else if (set->fb->pixel_format !=
|
2014-04-02 06:22:40 +08:00
|
|
|
set->crtc->primary->fb->pixel_format) {
|
2013-04-22 07:38:47 +08:00
|
|
|
mode_changed = true;
|
2010-02-11 12:28:58 +08:00
|
|
|
} else
|
2009-01-10 05:56:14 +08:00
|
|
|
fb_changed = true;
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
if (set->x != set->crtc->x || set->y != set->crtc->y)
|
2009-01-10 05:56:14 +08:00
|
|
|
fb_changed = true;
|
2008-11-08 06:05:41 +08:00
|
|
|
|
|
|
|
if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
|
2009-07-20 13:48:07 +08:00
|
|
|
DRM_DEBUG_KMS("modes are different, full mode set\n");
|
2008-11-08 06:05:41 +08:00
|
|
|
drm_mode_debug_printmodeline(&set->crtc->mode);
|
|
|
|
drm_mode_debug_printmodeline(set->mode);
|
2009-01-10 05:56:14 +08:00
|
|
|
mode_changed = true;
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* a) traverse passed in connector list and get encoders for them */
|
|
|
|
count = 0;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
|
|
struct drm_connector_helper_funcs *connector_funcs =
|
|
|
|
connector->helper_private;
|
|
|
|
new_encoder = connector->encoder;
|
|
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
|
|
if (set->connectors[ro] == connector) {
|
|
|
|
new_encoder = connector_funcs->best_encoder(connector);
|
|
|
|
/* if we can't get an encoder for a connector
|
|
|
|
we are setting now - then fail */
|
|
|
|
if (new_encoder == NULL)
|
|
|
|
/* don't break so fail path works correct */
|
|
|
|
fail = 1;
|
2013-07-20 00:57:11 +08:00
|
|
|
|
|
|
|
if (connector->dpms != DRM_MODE_DPMS_ON) {
|
|
|
|
DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
|
|
|
|
mode_changed = true;
|
|
|
|
}
|
2014-04-02 04:14:59 +08:00
|
|
|
|
|
|
|
break;
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (new_encoder != connector->encoder) {
|
2009-07-20 13:48:07 +08:00
|
|
|
DRM_DEBUG_KMS("encoder changed, full mode switch\n");
|
2009-01-10 05:56:14 +08:00
|
|
|
mode_changed = true;
|
2009-08-19 06:56:45 +08:00
|
|
|
/* If the encoder is reused for another connector, then
|
|
|
|
* the appropriate crtc will be set later.
|
|
|
|
*/
|
2009-09-01 09:39:04 +08:00
|
|
|
if (connector->encoder)
|
|
|
|
connector->encoder->crtc = NULL;
|
2008-11-08 06:05:41 +08:00
|
|
|
connector->encoder = new_encoder;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fail) {
|
|
|
|
ret = -EINVAL;
|
2009-08-27 16:18:29 +08:00
|
|
|
goto fail;
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
count = 0;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
|
|
if (!connector->encoder)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (connector->encoder->crtc == set->crtc)
|
|
|
|
new_crtc = NULL;
|
|
|
|
else
|
|
|
|
new_crtc = connector->encoder->crtc;
|
|
|
|
|
|
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
|
|
if (set->connectors[ro] == connector)
|
|
|
|
new_crtc = set->crtc;
|
|
|
|
}
|
2009-02-24 08:09:34 +08:00
|
|
|
|
|
|
|
/* Make sure the new CRTC will work with the encoder */
|
|
|
|
if (new_crtc &&
|
|
|
|
!drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
|
|
|
|
ret = -EINVAL;
|
2009-08-27 16:18:29 +08:00
|
|
|
goto fail;
|
2009-02-24 08:09:34 +08:00
|
|
|
}
|
2008-11-08 06:05:41 +08:00
|
|
|
if (new_crtc != connector->encoder->crtc) {
|
2009-07-20 13:48:07 +08:00
|
|
|
DRM_DEBUG_KMS("crtc changed, full mode switch\n");
|
2009-01-10 05:56:14 +08:00
|
|
|
mode_changed = true;
|
2008-11-08 06:05:41 +08:00
|
|
|
connector->encoder->crtc = new_crtc;
|
|
|
|
}
|
2010-07-16 03:43:25 +08:00
|
|
|
if (new_crtc) {
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
|
|
|
|
connector->base.id, drm_get_connector_name(connector),
|
|
|
|
new_crtc->base.id);
|
|
|
|
} else {
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
|
|
|
|
connector->base.id, drm_get_connector_name(connector));
|
|
|
|
}
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* mode_set_base is not a required function */
|
2009-01-10 05:56:14 +08:00
|
|
|
if (fb_changed && !crtc_funcs->mode_set_base)
|
|
|
|
mode_changed = true;
|
2008-11-08 06:05:41 +08:00
|
|
|
|
2009-01-10 05:56:14 +08:00
|
|
|
if (mode_changed) {
|
2013-10-29 23:09:45 +08:00
|
|
|
if (drm_helper_crtc_in_use(set->crtc)) {
|
2009-07-20 13:48:07 +08:00
|
|
|
DRM_DEBUG_KMS("attempting to set mode from"
|
|
|
|
" userspace\n");
|
2008-11-08 06:05:41 +08:00
|
|
|
drm_mode_debug_printmodeline(set->mode);
|
2014-04-02 06:22:40 +08:00
|
|
|
set->crtc->primary->fb = set->fb;
|
2008-11-08 06:05:41 +08:00
|
|
|
if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
|
2008-12-18 11:14:46 +08:00
|
|
|
set->x, set->y,
|
2013-10-29 23:09:42 +08:00
|
|
|
save_set.fb)) {
|
2010-07-16 03:43:25 +08:00
|
|
|
DRM_ERROR("failed to set mode on [CRTC:%d]\n",
|
|
|
|
set->crtc->base.id);
|
2014-04-02 06:22:40 +08:00
|
|
|
set->crtc->primary->fb = save_set.fb;
|
2008-11-08 06:05:41 +08:00
|
|
|
ret = -EINVAL;
|
2009-08-27 16:18:29 +08:00
|
|
|
goto fail;
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
2013-07-20 00:57:11 +08:00
|
|
|
DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
|
|
|
|
for (i = 0; i < set->num_connectors; i++) {
|
|
|
|
DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
|
|
|
|
drm_get_connector_name(set->connectors[i]));
|
|
|
|
set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
|
|
|
|
}
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
2014-03-20 21:26:34 +08:00
|
|
|
__drm_helper_disable_unused_functions(dev);
|
2009-01-10 05:56:14 +08:00
|
|
|
} else if (fb_changed) {
|
2009-09-18 08:43:52 +08:00
|
|
|
set->crtc->x = set->x;
|
|
|
|
set->crtc->y = set->y;
|
2014-04-02 06:22:40 +08:00
|
|
|
set->crtc->primary->fb = set->fb;
|
2009-02-11 21:25:09 +08:00
|
|
|
ret = crtc_funcs->mode_set_base(set->crtc,
|
2013-10-29 23:09:42 +08:00
|
|
|
set->x, set->y, save_set.fb);
|
2011-01-08 23:10:41 +08:00
|
|
|
if (ret != 0) {
|
2013-10-29 23:09:43 +08:00
|
|
|
set->crtc->x = save_set.x;
|
|
|
|
set->crtc->y = save_set.y;
|
2014-04-02 06:22:40 +08:00
|
|
|
set->crtc->primary->fb = save_set.fb;
|
2009-08-27 16:18:29 +08:00
|
|
|
goto fail;
|
2011-01-08 23:10:41 +08:00
|
|
|
}
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
|
2009-08-27 16:18:29 +08:00
|
|
|
kfree(save_connectors);
|
2008-11-08 06:05:41 +08:00
|
|
|
kfree(save_encoders);
|
|
|
|
return 0;
|
|
|
|
|
2009-08-27 16:18:29 +08:00
|
|
|
fail:
|
|
|
|
/* Restore all previous data. */
|
|
|
|
count = 0;
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
*encoder = save_encoders[count++];
|
2009-02-12 00:39:21 +08:00
|
|
|
}
|
2009-08-27 16:18:29 +08:00
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
count = 0;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
2009-08-27 16:18:29 +08:00
|
|
|
*connector = save_connectors[count++];
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
2009-08-27 16:18:29 +08:00
|
|
|
|
2011-11-08 02:39:57 +08:00
|
|
|
/* Try to restore the config */
|
|
|
|
if (mode_changed &&
|
|
|
|
!drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
|
|
|
|
save_set.y, save_set.fb))
|
|
|
|
DRM_ERROR("failed to restore config after modeset failure\n");
|
|
|
|
|
2009-08-27 16:18:29 +08:00
|
|
|
kfree(save_connectors);
|
2008-11-08 06:05:41 +08:00
|
|
|
kfree(save_encoders);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_crtc_helper_set_config);
|
|
|
|
|
2009-05-31 11:42:28 +08:00
|
|
|
static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
|
|
|
|
{
|
|
|
|
int dpms = DRM_MODE_DPMS_OFF;
|
|
|
|
struct drm_connector *connector;
|
|
|
|
struct drm_device *dev = encoder->dev;
|
|
|
|
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
|
|
|
|
if (connector->encoder == encoder)
|
|
|
|
if (connector->dpms < dpms)
|
|
|
|
dpms = connector->dpms;
|
|
|
|
return dpms;
|
|
|
|
}
|
|
|
|
|
2013-08-15 04:47:37 +08:00
|
|
|
/* Helper which handles bridge ordering around encoder dpms */
|
|
|
|
static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode)
|
|
|
|
{
|
|
|
|
struct drm_bridge *bridge = encoder->bridge;
|
|
|
|
struct drm_encoder_helper_funcs *encoder_funcs;
|
|
|
|
|
|
|
|
if (bridge) {
|
|
|
|
if (mode == DRM_MODE_DPMS_ON)
|
|
|
|
bridge->funcs->pre_enable(bridge);
|
|
|
|
else
|
|
|
|
bridge->funcs->disable(bridge);
|
|
|
|
}
|
|
|
|
|
|
|
|
encoder_funcs = encoder->helper_private;
|
|
|
|
if (encoder_funcs->dpms)
|
|
|
|
encoder_funcs->dpms(encoder, mode);
|
|
|
|
|
|
|
|
if (bridge) {
|
|
|
|
if (mode == DRM_MODE_DPMS_ON)
|
|
|
|
bridge->funcs->enable(bridge);
|
|
|
|
else
|
|
|
|
bridge->funcs->post_disable(bridge);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-05-31 11:42:28 +08:00
|
|
|
static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
|
|
|
|
{
|
|
|
|
int dpms = DRM_MODE_DPMS_OFF;
|
|
|
|
struct drm_connector *connector;
|
|
|
|
struct drm_device *dev = crtc->dev;
|
|
|
|
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
|
|
|
|
if (connector->encoder && connector->encoder->crtc == crtc)
|
|
|
|
if (connector->dpms < dpms)
|
|
|
|
dpms = connector->dpms;
|
|
|
|
return dpms;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2012-11-01 21:45:16 +08:00
|
|
|
* drm_helper_connector_dpms() - connector dpms helper implementation
|
|
|
|
* @connector: affected connector
|
|
|
|
* @mode: DPMS mode
|
2009-05-31 11:42:28 +08:00
|
|
|
*
|
2012-11-01 21:45:16 +08:00
|
|
|
* This is the main helper function provided by the crtc helper framework for
|
|
|
|
* implementing the DPMS connector attribute. It computes the new desired DPMS
|
|
|
|
* state for all encoders and crtcs in the output mesh and calls the ->dpms()
|
|
|
|
* callback provided by the driver appropriately.
|
2009-05-31 11:42:28 +08:00
|
|
|
*/
|
|
|
|
void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
|
|
|
|
{
|
|
|
|
struct drm_encoder *encoder = connector->encoder;
|
|
|
|
struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
|
2013-08-15 04:47:37 +08:00
|
|
|
int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
|
2009-05-31 11:42:28 +08:00
|
|
|
|
|
|
|
if (mode == connector->dpms)
|
|
|
|
return;
|
|
|
|
|
|
|
|
old_dpms = connector->dpms;
|
|
|
|
connector->dpms = mode;
|
|
|
|
|
2013-08-15 04:47:37 +08:00
|
|
|
if (encoder)
|
|
|
|
encoder_dpms = drm_helper_choose_encoder_dpms(encoder);
|
|
|
|
|
2009-05-31 11:42:28 +08:00
|
|
|
/* from off to on, do crtc then encoder */
|
|
|
|
if (mode < old_dpms) {
|
|
|
|
if (crtc) {
|
|
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
|
|
if (crtc_funcs->dpms)
|
|
|
|
(*crtc_funcs->dpms) (crtc,
|
|
|
|
drm_helper_choose_crtc_dpms(crtc));
|
|
|
|
}
|
2013-08-15 04:47:37 +08:00
|
|
|
if (encoder)
|
|
|
|
drm_helper_encoder_dpms(encoder, encoder_dpms);
|
2009-05-31 11:42:28 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* from on to off, do encoder then crtc */
|
|
|
|
if (mode > old_dpms) {
|
2013-08-15 04:47:37 +08:00
|
|
|
if (encoder)
|
|
|
|
drm_helper_encoder_dpms(encoder, encoder_dpms);
|
2009-05-31 11:42:28 +08:00
|
|
|
if (crtc) {
|
|
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
|
|
if (crtc_funcs->dpms)
|
|
|
|
(*crtc_funcs->dpms) (crtc,
|
|
|
|
drm_helper_choose_crtc_dpms(crtc));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_helper_connector_dpms);
|
|
|
|
|
2014-01-24 05:58:26 +08:00
|
|
|
/**
|
|
|
|
* drm_helper_mode_fill_fb_struct - fill out framebuffer metadata
|
|
|
|
* @fb: drm_framebuffer object to fill out
|
|
|
|
* @mode_cmd: metadata from the userspace fb creation request
|
|
|
|
*
|
|
|
|
* This helper can be used in a drivers fb_create callback to pre-fill the fb's
|
|
|
|
* metadata fields.
|
|
|
|
*/
|
2014-01-24 05:16:24 +08:00
|
|
|
void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
|
|
|
|
struct drm_mode_fb_cmd2 *mode_cmd)
|
2008-11-08 06:05:41 +08:00
|
|
|
{
|
2011-12-20 06:06:49 +08:00
|
|
|
int i;
|
|
|
|
|
2008-11-08 06:05:41 +08:00
|
|
|
fb->width = mode_cmd->width;
|
|
|
|
fb->height = mode_cmd->height;
|
2011-12-20 06:06:49 +08:00
|
|
|
for (i = 0; i < 4; i++) {
|
|
|
|
fb->pitches[i] = mode_cmd->pitches[i];
|
|
|
|
fb->offsets[i] = mode_cmd->offsets[i];
|
|
|
|
}
|
2011-11-30 04:02:54 +08:00
|
|
|
drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
|
2011-11-15 06:51:28 +08:00
|
|
|
&fb->bits_per_pixel);
|
|
|
|
fb->pixel_format = mode_cmd->pixel_format;
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
|
|
|
|
|
2014-01-22 23:42:02 +08:00
|
|
|
/**
|
|
|
|
* drm_helper_resume_force_mode - force-restore mode setting configuration
|
|
|
|
* @dev: drm_device which should be restored
|
|
|
|
*
|
|
|
|
* Drivers which use the mode setting helpers can use this function to
|
|
|
|
* force-restore the mode setting configuration e.g. on resume or when something
|
|
|
|
* else might have trampled over the hw state (like some overzealous old BIOSen
|
|
|
|
* tended to do).
|
2014-01-24 05:28:30 +08:00
|
|
|
*
|
|
|
|
* This helper doesn't provide a error return value since restoring the old
|
|
|
|
* config should never fail due to resource allocation issues since the driver
|
|
|
|
* has successfully set the restored configuration already. Hence this should
|
|
|
|
* boil down to the equivalent of a few dpms on calls, which also don't provide
|
|
|
|
* an error code.
|
|
|
|
*
|
|
|
|
* Drivers where simply restoring an old configuration again might fail (e.g.
|
|
|
|
* due to slight differences in allocating shared resources when the
|
|
|
|
* configuration is restored in a different order than when userspace set it up)
|
|
|
|
* need to use their own restore logic.
|
2014-01-22 23:42:02 +08:00
|
|
|
*/
|
2014-01-24 05:28:30 +08:00
|
|
|
void drm_helper_resume_force_mode(struct drm_device *dev)
|
2008-11-08 06:05:41 +08:00
|
|
|
{
|
|
|
|
struct drm_crtc *crtc;
|
2009-12-31 14:30:46 +08:00
|
|
|
struct drm_encoder *encoder;
|
|
|
|
struct drm_crtc_helper_funcs *crtc_funcs;
|
2014-01-24 05:28:30 +08:00
|
|
|
int encoder_dpms;
|
|
|
|
bool ret;
|
2008-11-08 06:05:41 +08:00
|
|
|
|
2014-03-21 08:45:40 +08:00
|
|
|
drm_modeset_lock_all(dev);
|
2008-11-08 06:05:41 +08:00
|
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
|
|
|
|
|
|
if (!crtc->enabled)
|
|
|
|
continue;
|
|
|
|
|
2008-12-18 11:14:46 +08:00
|
|
|
ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
|
2014-04-02 06:22:40 +08:00
|
|
|
crtc->x, crtc->y, crtc->primary->fb);
|
2008-11-08 06:05:41 +08:00
|
|
|
|
2014-01-24 05:28:30 +08:00
|
|
|
/* Restoring the old config should never fail! */
|
2008-11-08 06:05:41 +08:00
|
|
|
if (ret == false)
|
|
|
|
DRM_ERROR("failed to set mode on crtc %p\n", crtc);
|
2009-12-31 14:30:46 +08:00
|
|
|
|
|
|
|
/* Turn off outputs that were already powered off */
|
|
|
|
if (drm_helper_choose_crtc_dpms(crtc)) {
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
|
|
|
|
if(encoder->crtc != crtc)
|
|
|
|
continue;
|
|
|
|
|
2013-08-15 04:47:37 +08:00
|
|
|
encoder_dpms = drm_helper_choose_encoder_dpms(
|
|
|
|
encoder);
|
|
|
|
|
|
|
|
drm_helper_encoder_dpms(encoder, encoder_dpms);
|
2009-12-31 14:30:46 +08:00
|
|
|
}
|
2010-08-06 22:03:31 +08:00
|
|
|
|
|
|
|
crtc_funcs = crtc->helper_private;
|
|
|
|
if (crtc_funcs->dpms)
|
|
|
|
(*crtc_funcs->dpms) (crtc,
|
|
|
|
drm_helper_choose_crtc_dpms(crtc));
|
2009-12-31 14:30:46 +08:00
|
|
|
}
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
2014-01-24 05:28:30 +08:00
|
|
|
|
2009-07-08 14:13:13 +08:00
|
|
|
/* disable the unused connectors while restoring the modesetting */
|
2014-03-20 21:26:34 +08:00
|
|
|
__drm_helper_disable_unused_functions(dev);
|
2014-03-21 08:45:40 +08:00
|
|
|
drm_modeset_unlock_all(dev);
|
2008-11-08 06:05:41 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_helper_resume_force_mode);
|