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![Thierry Reding](/assets/img/avatar_default.png)
Currently the functions that initialize and tear down a connector iterator use the _get() and _put() suffixes. However, these suffixes are typically used by reference counting functions. Make these function names a little more consistent by changing the suffixes to _begin() and _end(), which is a fairly common pattern in the rest of the Linux kernel. Suggested-by: Jani Nikula <jani.nikula@linux.intel.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170228144643.5668-8-thierry.reding@gmail.com
1099 lines
33 KiB
C
1099 lines
33 KiB
C
/*
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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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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/moduleparam.h>
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#include <drm/drmP.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_encoder.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_plane_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_edid.h>
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/**
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* DOC: overview
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*
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* The CRTC modeset helper library provides a default set_config implementation
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* in drm_crtc_helper_set_config(). Plus a few other convenience functions using
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* the same callbacks which drivers can use to e.g. restore the modeset
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* configuration on resume with drm_helper_resume_force_mode().
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*
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* Note that this helper library doesn't track the current power state of CRTCs
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* and encoders. It can call callbacks like &drm_encoder_helper_funcs.dpms even
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* though the hardware is already in the desired state. This deficiency has been
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* fixed in the atomic helpers.
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*
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* The driver callbacks are mostly compatible with the atomic modeset helpers,
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* except for the handling of the primary plane: Atomic helpers require that the
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* primary plane is implemented as a real standalone plane and not directly tied
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* to the CRTC state. For easier transition this library provides functions to
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* implement the old semantics required by the CRTC helpers using the new plane
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* and atomic helper callbacks.
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*
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* Drivers are strongly urged to convert to the atomic helpers (by way of first
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* converting to the plane helpers). New drivers must not use these functions
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* but need to implement the atomic interface instead, potentially using the
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* atomic helpers for that.
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*
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* These legacy modeset helpers use the same function table structures as
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* all other modesetting helpers. See the documentation for struct
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* &drm_crtc_helper_funcs, &struct drm_encoder_helper_funcs and struct
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* &drm_connector_helper_funcs.
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*/
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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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* 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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*
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* Returns:
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* True if @encoder is used, false otherwise.
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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_connector_list_iter conn_iter;
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struct drm_device *dev = encoder->dev;
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/*
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* We can expect this mutex to be locked if we are not panicking.
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* Locking is currently fubar in the panic handler.
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*/
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if (!oops_in_progress) {
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WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
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WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
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}
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drm_connector_list_iter_begin(dev, &conn_iter);
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drm_for_each_connector_iter(connector, &conn_iter) {
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if (connector->encoder == encoder) {
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drm_connector_list_iter_end(&conn_iter);
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return true;
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}
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}
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drm_connector_list_iter_end(&conn_iter);
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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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/**
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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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* 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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*
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* Returns:
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* True if @crtc is used, false otherwise.
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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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/*
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* We can expect this mutex to be locked if we are not panicking.
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* Locking is currently fubar in the panic handler.
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*/
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if (!oops_in_progress)
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WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
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drm_for_each_encoder(encoder, dev)
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if (encoder->crtc == crtc && drm_helper_encoder_in_use(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_crtc_in_use);
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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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const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
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if (!encoder_funcs)
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return;
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drm_bridge_disable(encoder->bridge);
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if (encoder_funcs->disable)
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(*encoder_funcs->disable)(encoder);
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else if (encoder_funcs->dpms)
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(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
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drm_bridge_post_disable(encoder->bridge);
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}
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static void __drm_helper_disable_unused_functions(struct drm_device *dev)
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{
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struct drm_encoder *encoder;
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struct drm_crtc *crtc;
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drm_warn_on_modeset_not_all_locked(dev);
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drm_for_each_encoder(encoder, dev) {
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if (!drm_helper_encoder_in_use(encoder)) {
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drm_encoder_disable(encoder);
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/* disconnect encoder from any connector */
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encoder->crtc = NULL;
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}
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}
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drm_for_each_crtc(crtc, dev) {
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const 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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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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crtc->primary->fb = NULL;
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}
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}
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}
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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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* NOTE:
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*
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* This function is part of the legacy modeset helper library and will cause
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* major confusion with atomic drivers. This is because atomic helpers guarantee
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* to never call ->disable() hooks on a disabled function, or ->enable() hooks
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* on an enabled functions. drm_helper_disable_unused_functions() on the other
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* hand throws such guarantees into the wind and calls disable hooks
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* unconditionally on unused functions.
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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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if (drm_core_check_feature(dev, DRIVER_ATOMIC))
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DRM_ERROR("Called for atomic driver, this is not what you want.\n");
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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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EXPORT_SYMBOL(drm_helper_disable_unused_functions);
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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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const struct drm_encoder_helper_funcs *encoder_funcs;
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struct drm_encoder *encoder;
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drm_for_each_encoder(encoder, dev) {
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encoder_funcs = encoder->helper_private;
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if (!encoder_funcs)
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continue;
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/* Disable unused encoders */
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if (encoder->crtc == NULL)
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drm_encoder_disable(encoder);
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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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drm_encoder_disable(encoder);
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}
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}
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/**
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* drm_crtc_helper_set_mode - internal helper to set a mode
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* @crtc: CRTC to program
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* @mode: mode to use
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* @x: horizontal offset into the surface
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* @y: vertical offset into the surface
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* @old_fb: old framebuffer, for cleanup
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*
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* Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
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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.
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*
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* Returns:
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* True if the mode was set successfully, false otherwise.
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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,
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int x, int y,
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struct drm_framebuffer *old_fb)
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{
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struct drm_device *dev = crtc->dev;
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struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
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const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
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const struct drm_encoder_helper_funcs *encoder_funcs;
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int saved_x, saved_y;
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bool saved_enabled;
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struct drm_encoder *encoder;
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bool ret = true;
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drm_warn_on_modeset_not_all_locked(dev);
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saved_enabled = crtc->enabled;
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crtc->enabled = drm_helper_crtc_in_use(crtc);
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if (!crtc->enabled)
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return true;
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adjusted_mode = drm_mode_duplicate(dev, mode);
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if (!adjusted_mode) {
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crtc->enabled = saved_enabled;
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return false;
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}
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saved_mode = crtc->mode;
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saved_hwmode = crtc->hwmode;
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saved_x = crtc->x;
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saved_y = crtc->y;
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/* Update crtc values up front so the driver can rely on them for mode
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* setting.
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*/
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crtc->mode = *mode;
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crtc->x = x;
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crtc->y = y;
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/* Pass our mode to the connectors and the CRTC to give them a chance to
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* adjust it according to limitations or connector properties, and also
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* a chance to reject the mode entirely.
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*/
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drm_for_each_encoder(encoder, dev) {
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if (encoder->crtc != crtc)
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continue;
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encoder_funcs = encoder->helper_private;
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if (!encoder_funcs)
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continue;
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ret = drm_bridge_mode_fixup(encoder->bridge,
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mode, adjusted_mode);
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if (!ret) {
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DRM_DEBUG_KMS("Bridge fixup failed\n");
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goto done;
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}
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encoder_funcs = encoder->helper_private;
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if (encoder_funcs->mode_fixup) {
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if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
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adjusted_mode))) {
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DRM_DEBUG_KMS("Encoder fixup failed\n");
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goto done;
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}
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}
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}
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if (crtc_funcs->mode_fixup) {
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if (!(ret = crtc_funcs->mode_fixup(crtc, mode,
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adjusted_mode))) {
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DRM_DEBUG_KMS("CRTC fixup failed\n");
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goto done;
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}
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}
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DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
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crtc->hwmode = *adjusted_mode;
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/* Prepare the encoders and CRTCs before setting the mode. */
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drm_for_each_encoder(encoder, dev) {
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if (encoder->crtc != crtc)
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continue;
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encoder_funcs = encoder->helper_private;
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if (!encoder_funcs)
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continue;
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drm_bridge_disable(encoder->bridge);
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/* Disable the encoders as the first thing we do. */
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if (encoder_funcs->prepare)
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encoder_funcs->prepare(encoder);
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drm_bridge_post_disable(encoder->bridge);
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}
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drm_crtc_prepare_encoders(dev);
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crtc_funcs->prepare(crtc);
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/* Set up the DPLL and any encoders state that needs to adjust or depend
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* on the DPLL.
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*/
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ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
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if (!ret)
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goto done;
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drm_for_each_encoder(encoder, dev) {
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if (encoder->crtc != crtc)
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continue;
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encoder_funcs = encoder->helper_private;
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if (!encoder_funcs)
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continue;
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DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
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encoder->base.id, encoder->name,
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mode->base.id, mode->name);
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if (encoder_funcs->mode_set)
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encoder_funcs->mode_set(encoder, mode, adjusted_mode);
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drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode);
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}
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/* Now enable the clocks, plane, pipe, and connectors that we set up. */
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crtc_funcs->commit(crtc);
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drm_for_each_encoder(encoder, dev) {
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if (encoder->crtc != crtc)
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continue;
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encoder_funcs = encoder->helper_private;
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if (!encoder_funcs)
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continue;
|
|
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drm_bridge_pre_enable(encoder->bridge);
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|
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if (encoder_funcs->commit)
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encoder_funcs->commit(encoder);
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drm_bridge_enable(encoder->bridge);
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}
|
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|
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/* Calculate and store various constants which
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* are later needed by vblank and swap-completion
|
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* timestamping. They are derived from true hwmode.
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*/
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drm_calc_timestamping_constants(crtc, &crtc->hwmode);
|
|
|
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/* FIXME: add subpixel order */
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done:
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drm_mode_destroy(dev, adjusted_mode);
|
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if (!ret) {
|
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crtc->enabled = saved_enabled;
|
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crtc->mode = saved_mode;
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crtc->hwmode = saved_hwmode;
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crtc->x = saved_x;
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crtc->y = saved_y;
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}
|
|
|
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return ret;
|
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}
|
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EXPORT_SYMBOL(drm_crtc_helper_set_mode);
|
|
|
|
static void
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drm_crtc_helper_disable(struct drm_crtc *crtc)
|
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{
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struct drm_device *dev = crtc->dev;
|
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struct drm_connector *connector;
|
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struct drm_encoder *encoder;
|
|
|
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/* Decouple all encoders and their attached connectors from this crtc */
|
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drm_for_each_encoder(encoder, dev) {
|
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struct drm_connector_list_iter conn_iter;
|
|
|
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if (encoder->crtc != crtc)
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continue;
|
|
|
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drm_connector_list_iter_begin(dev, &conn_iter);
|
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drm_for_each_connector_iter(connector, &conn_iter) {
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if (connector->encoder != encoder)
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continue;
|
|
|
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connector->encoder = NULL;
|
|
|
|
/*
|
|
* drm_helper_disable_unused_functions() ought to be
|
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* doing this, but since we've decoupled the encoder
|
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* from the connector above, the required connection
|
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* between them is henceforth no longer available.
|
|
*/
|
|
connector->dpms = DRM_MODE_DPMS_OFF;
|
|
|
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/* we keep a reference while the encoder is bound */
|
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drm_connector_put(connector);
|
|
}
|
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drm_connector_list_iter_end(&conn_iter);
|
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}
|
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|
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__drm_helper_disable_unused_functions(dev);
|
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}
|
|
|
|
/**
|
|
* drm_crtc_helper_set_config - set a new config from userspace
|
|
* @set: mode set configuration
|
|
*
|
|
* The drm_crtc_helper_set_config() helper function implements the of
|
|
* &drm_crtc_funcs.set_config callback for drivers using the legacy CRTC
|
|
* helpers.
|
|
*
|
|
* It first tries to locate the best encoder for each connector by calling the
|
|
* connector @drm_connector_helper_funcs.best_encoder helper operation.
|
|
*
|
|
* After locating the appropriate encoders, the helper function will call the
|
|
* mode_fixup encoder and CRTC helper operations to adjust the requested mode,
|
|
* or reject it completely in which case an error will be returned to the
|
|
* application. If the new configuration after mode adjustment is identical to
|
|
* the current configuration the helper function will return without performing
|
|
* any other operation.
|
|
*
|
|
* If the adjusted mode is identical to the current mode but changes to the
|
|
* frame buffer need to be applied, the drm_crtc_helper_set_config() function
|
|
* will call the CRTC &drm_crtc_helper_funcs.mode_set_base helper operation.
|
|
*
|
|
* If the adjusted mode differs from the current mode, or if the
|
|
* ->mode_set_base() helper operation is not provided, the helper function
|
|
* performs a full mode set sequence by calling the ->prepare(), ->mode_set()
|
|
* and ->commit() CRTC and encoder helper operations, in that order.
|
|
* Alternatively it can also use the dpms and disable helper operations. For
|
|
* details see &struct drm_crtc_helper_funcs and struct
|
|
* &drm_encoder_helper_funcs.
|
|
*
|
|
* This function is deprecated. New drivers must implement atomic modeset
|
|
* support, for which this function is unsuitable. Instead drivers should use
|
|
* drm_atomic_helper_set_config().
|
|
*
|
|
* Returns:
|
|
* Returns 0 on success, negative errno numbers on failure.
|
|
*/
|
|
int drm_crtc_helper_set_config(struct drm_mode_set *set)
|
|
{
|
|
struct drm_device *dev;
|
|
struct drm_crtc **save_encoder_crtcs, *new_crtc;
|
|
struct drm_encoder **save_connector_encoders, *new_encoder, *encoder;
|
|
bool mode_changed = false; /* if true do a full mode set */
|
|
bool fb_changed = false; /* if true and !mode_changed just do a flip */
|
|
struct drm_connector *connector;
|
|
struct drm_connector_list_iter conn_iter;
|
|
int count = 0, ro, fail = 0;
|
|
const struct drm_crtc_helper_funcs *crtc_funcs;
|
|
struct drm_mode_set save_set;
|
|
int ret;
|
|
int i;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
BUG_ON(!set);
|
|
BUG_ON(!set->crtc);
|
|
BUG_ON(!set->crtc->helper_private);
|
|
|
|
/* 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);
|
|
|
|
crtc_funcs = set->crtc->helper_private;
|
|
|
|
if (!set->mode)
|
|
set->fb = NULL;
|
|
|
|
if (set->fb) {
|
|
DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n",
|
|
set->crtc->base.id, set->crtc->name,
|
|
set->fb->base.id,
|
|
(int)set->num_connectors, set->x, set->y);
|
|
} else {
|
|
DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n",
|
|
set->crtc->base.id, set->crtc->name);
|
|
drm_crtc_helper_disable(set->crtc);
|
|
return 0;
|
|
}
|
|
|
|
dev = set->crtc->dev;
|
|
|
|
drm_warn_on_modeset_not_all_locked(dev);
|
|
|
|
/*
|
|
* Allocate space for the backup of all (non-pointer) encoder and
|
|
* connector data.
|
|
*/
|
|
save_encoder_crtcs = kzalloc(dev->mode_config.num_encoder *
|
|
sizeof(struct drm_crtc *), GFP_KERNEL);
|
|
if (!save_encoder_crtcs)
|
|
return -ENOMEM;
|
|
|
|
save_connector_encoders = kzalloc(dev->mode_config.num_connector *
|
|
sizeof(struct drm_encoder *), GFP_KERNEL);
|
|
if (!save_connector_encoders) {
|
|
kfree(save_encoder_crtcs);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* Copy data. Note that driver private data is not affected.
|
|
* Should anything bad happen only the expected state is
|
|
* restored, not the drivers personal bookkeeping.
|
|
*/
|
|
count = 0;
|
|
drm_for_each_encoder(encoder, dev) {
|
|
save_encoder_crtcs[count++] = encoder->crtc;
|
|
}
|
|
|
|
count = 0;
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
|
drm_for_each_connector_iter(connector, &conn_iter)
|
|
save_connector_encoders[count++] = connector->encoder;
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
|
|
save_set.crtc = set->crtc;
|
|
save_set.mode = &set->crtc->mode;
|
|
save_set.x = set->crtc->x;
|
|
save_set.y = set->crtc->y;
|
|
save_set.fb = set->crtc->primary->fb;
|
|
|
|
/* We should be able to check here if the fb has the same properties
|
|
* and then just flip_or_move it */
|
|
if (set->crtc->primary->fb != set->fb) {
|
|
/* If we have no fb then treat it as a full mode set */
|
|
if (set->crtc->primary->fb == NULL) {
|
|
DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
|
|
mode_changed = true;
|
|
} else if (set->fb->format != set->crtc->primary->fb->format) {
|
|
mode_changed = true;
|
|
} else
|
|
fb_changed = true;
|
|
}
|
|
|
|
if (set->x != set->crtc->x || set->y != set->crtc->y)
|
|
fb_changed = true;
|
|
|
|
if (!drm_mode_equal(set->mode, &set->crtc->mode)) {
|
|
DRM_DEBUG_KMS("modes are different, full mode set\n");
|
|
drm_mode_debug_printmodeline(&set->crtc->mode);
|
|
drm_mode_debug_printmodeline(set->mode);
|
|
mode_changed = true;
|
|
}
|
|
|
|
/* take a reference on all unbound connectors in set, reuse the
|
|
* already taken reference for bound connectors
|
|
*/
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
if (set->connectors[ro]->encoder)
|
|
continue;
|
|
drm_connector_get(set->connectors[ro]);
|
|
}
|
|
|
|
/* a) traverse passed in connector list and get encoders for them */
|
|
count = 0;
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
|
drm_for_each_connector_iter(connector, &conn_iter) {
|
|
const 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;
|
|
|
|
if (connector->dpms != DRM_MODE_DPMS_ON) {
|
|
DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
|
|
mode_changed = true;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (new_encoder != connector->encoder) {
|
|
DRM_DEBUG_KMS("encoder changed, full mode switch\n");
|
|
mode_changed = true;
|
|
/* If the encoder is reused for another connector, then
|
|
* the appropriate crtc will be set later.
|
|
*/
|
|
if (connector->encoder)
|
|
connector->encoder->crtc = NULL;
|
|
connector->encoder = new_encoder;
|
|
}
|
|
}
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
|
|
if (fail) {
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
count = 0;
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
|
drm_for_each_connector_iter(connector, &conn_iter) {
|
|
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;
|
|
}
|
|
|
|
/* Make sure the new CRTC will work with the encoder */
|
|
if (new_crtc &&
|
|
!drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
|
|
ret = -EINVAL;
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
goto fail;
|
|
}
|
|
if (new_crtc != connector->encoder->crtc) {
|
|
DRM_DEBUG_KMS("crtc changed, full mode switch\n");
|
|
mode_changed = true;
|
|
connector->encoder->crtc = new_crtc;
|
|
}
|
|
if (new_crtc) {
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n",
|
|
connector->base.id, connector->name,
|
|
new_crtc->base.id, new_crtc->name);
|
|
} else {
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
|
|
connector->base.id, connector->name);
|
|
}
|
|
}
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
|
|
/* mode_set_base is not a required function */
|
|
if (fb_changed && !crtc_funcs->mode_set_base)
|
|
mode_changed = true;
|
|
|
|
if (mode_changed) {
|
|
if (drm_helper_crtc_in_use(set->crtc)) {
|
|
DRM_DEBUG_KMS("attempting to set mode from"
|
|
" userspace\n");
|
|
drm_mode_debug_printmodeline(set->mode);
|
|
set->crtc->primary->fb = set->fb;
|
|
if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
|
|
set->x, set->y,
|
|
save_set.fb)) {
|
|
DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n",
|
|
set->crtc->base.id, set->crtc->name);
|
|
set->crtc->primary->fb = save_set.fb;
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
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,
|
|
set->connectors[i]->name);
|
|
set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
|
|
}
|
|
}
|
|
__drm_helper_disable_unused_functions(dev);
|
|
} else if (fb_changed) {
|
|
set->crtc->x = set->x;
|
|
set->crtc->y = set->y;
|
|
set->crtc->primary->fb = set->fb;
|
|
ret = crtc_funcs->mode_set_base(set->crtc,
|
|
set->x, set->y, save_set.fb);
|
|
if (ret != 0) {
|
|
set->crtc->x = save_set.x;
|
|
set->crtc->y = save_set.y;
|
|
set->crtc->primary->fb = save_set.fb;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
kfree(save_connector_encoders);
|
|
kfree(save_encoder_crtcs);
|
|
return 0;
|
|
|
|
fail:
|
|
/* Restore all previous data. */
|
|
count = 0;
|
|
drm_for_each_encoder(encoder, dev) {
|
|
encoder->crtc = save_encoder_crtcs[count++];
|
|
}
|
|
|
|
count = 0;
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
|
drm_for_each_connector_iter(connector, &conn_iter)
|
|
connector->encoder = save_connector_encoders[count++];
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
|
|
/* after fail drop reference on all unbound connectors in set, let
|
|
* bound connectors keep their reference
|
|
*/
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
if (set->connectors[ro]->encoder)
|
|
continue;
|
|
drm_connector_put(set->connectors[ro]);
|
|
}
|
|
|
|
/* 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");
|
|
|
|
kfree(save_connector_encoders);
|
|
kfree(save_encoder_crtcs);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_crtc_helper_set_config);
|
|
|
|
static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
|
|
{
|
|
int dpms = DRM_MODE_DPMS_OFF;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_list_iter conn_iter;
|
|
struct drm_device *dev = encoder->dev;
|
|
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
|
drm_for_each_connector_iter(connector, &conn_iter)
|
|
if (connector->encoder == encoder)
|
|
if (connector->dpms < dpms)
|
|
dpms = connector->dpms;
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
|
|
return dpms;
|
|
}
|
|
|
|
/* 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;
|
|
const struct drm_encoder_helper_funcs *encoder_funcs;
|
|
|
|
encoder_funcs = encoder->helper_private;
|
|
if (!encoder_funcs)
|
|
return;
|
|
|
|
if (mode == DRM_MODE_DPMS_ON)
|
|
drm_bridge_pre_enable(bridge);
|
|
else
|
|
drm_bridge_disable(bridge);
|
|
|
|
if (encoder_funcs->dpms)
|
|
encoder_funcs->dpms(encoder, mode);
|
|
|
|
if (mode == DRM_MODE_DPMS_ON)
|
|
drm_bridge_enable(bridge);
|
|
else
|
|
drm_bridge_post_disable(bridge);
|
|
}
|
|
|
|
static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
|
|
{
|
|
int dpms = DRM_MODE_DPMS_OFF;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_list_iter conn_iter;
|
|
struct drm_device *dev = crtc->dev;
|
|
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
|
drm_for_each_connector_iter(connector, &conn_iter)
|
|
if (connector->encoder && connector->encoder->crtc == crtc)
|
|
if (connector->dpms < dpms)
|
|
dpms = connector->dpms;
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
|
|
return dpms;
|
|
}
|
|
|
|
/**
|
|
* drm_helper_connector_dpms() - connector dpms helper implementation
|
|
* @connector: affected connector
|
|
* @mode: DPMS mode
|
|
*
|
|
* The drm_helper_connector_dpms() helper function implements the
|
|
* &drm_connector_funcs.dpms callback for drivers using the legacy CRTC
|
|
* helpers.
|
|
*
|
|
* 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
|
|
* &drm_crtc_helper_funcs.dpms and &drm_encoder_helper_funcs.dpms callbacks
|
|
* provided by the driver.
|
|
*
|
|
* This function is deprecated. New drivers must implement atomic modeset
|
|
* support, for which this function is unsuitable. Instead drivers should use
|
|
* drm_atomic_helper_connector_dpms().
|
|
*
|
|
* Returns:
|
|
* Always returns 0.
|
|
*/
|
|
int drm_helper_connector_dpms(struct drm_connector *connector, int mode)
|
|
{
|
|
struct drm_encoder *encoder = connector->encoder;
|
|
struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
|
|
int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
|
|
|
|
if (mode == connector->dpms)
|
|
return 0;
|
|
|
|
old_dpms = connector->dpms;
|
|
connector->dpms = mode;
|
|
|
|
if (encoder)
|
|
encoder_dpms = drm_helper_choose_encoder_dpms(encoder);
|
|
|
|
/* from off to on, do crtc then encoder */
|
|
if (mode < old_dpms) {
|
|
if (crtc) {
|
|
const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
if (crtc_funcs->dpms)
|
|
(*crtc_funcs->dpms) (crtc,
|
|
drm_helper_choose_crtc_dpms(crtc));
|
|
}
|
|
if (encoder)
|
|
drm_helper_encoder_dpms(encoder, encoder_dpms);
|
|
}
|
|
|
|
/* from on to off, do encoder then crtc */
|
|
if (mode > old_dpms) {
|
|
if (encoder)
|
|
drm_helper_encoder_dpms(encoder, encoder_dpms);
|
|
if (crtc) {
|
|
const 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 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_connector_dpms);
|
|
|
|
/**
|
|
* 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).
|
|
*
|
|
* 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.
|
|
*
|
|
* This function is deprecated. New drivers should implement atomic mode-
|
|
* setting and use the atomic suspend/resume helpers.
|
|
*
|
|
* See also:
|
|
* drm_atomic_helper_suspend(), drm_atomic_helper_resume()
|
|
*/
|
|
void drm_helper_resume_force_mode(struct drm_device *dev)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
struct drm_encoder *encoder;
|
|
const struct drm_crtc_helper_funcs *crtc_funcs;
|
|
int encoder_dpms;
|
|
bool ret;
|
|
|
|
drm_modeset_lock_all(dev);
|
|
drm_for_each_crtc(crtc, dev) {
|
|
|
|
if (!crtc->enabled)
|
|
continue;
|
|
|
|
ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
|
|
crtc->x, crtc->y, crtc->primary->fb);
|
|
|
|
/* Restoring the old config should never fail! */
|
|
if (ret == false)
|
|
DRM_ERROR("failed to set mode on crtc %p\n", crtc);
|
|
|
|
/* Turn off outputs that were already powered off */
|
|
if (drm_helper_choose_crtc_dpms(crtc)) {
|
|
drm_for_each_encoder(encoder, dev) {
|
|
|
|
if(encoder->crtc != crtc)
|
|
continue;
|
|
|
|
encoder_dpms = drm_helper_choose_encoder_dpms(
|
|
encoder);
|
|
|
|
drm_helper_encoder_dpms(encoder, encoder_dpms);
|
|
}
|
|
|
|
crtc_funcs = crtc->helper_private;
|
|
if (crtc_funcs->dpms)
|
|
(*crtc_funcs->dpms) (crtc,
|
|
drm_helper_choose_crtc_dpms(crtc));
|
|
}
|
|
}
|
|
|
|
/* disable the unused connectors while restoring the modesetting */
|
|
__drm_helper_disable_unused_functions(dev);
|
|
drm_modeset_unlock_all(dev);
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_resume_force_mode);
|
|
|
|
/**
|
|
* drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers
|
|
* @crtc: DRM CRTC
|
|
* @mode: DRM display mode which userspace requested
|
|
* @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks
|
|
* @x: x offset of the CRTC scanout area on the underlying framebuffer
|
|
* @y: y offset of the CRTC scanout area on the underlying framebuffer
|
|
* @old_fb: previous framebuffer
|
|
*
|
|
* This function implements a callback useable as the ->mode_set callback
|
|
* required by the CRTC helpers. Besides the atomic plane helper functions for
|
|
* the primary plane the driver must also provide the ->mode_set_nofb callback
|
|
* to set up the CRTC.
|
|
*
|
|
* This is a transitional helper useful for converting drivers to the atomic
|
|
* interfaces.
|
|
*/
|
|
int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode, int x, int y,
|
|
struct drm_framebuffer *old_fb)
|
|
{
|
|
struct drm_crtc_state *crtc_state;
|
|
const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
int ret;
|
|
|
|
if (crtc->funcs->atomic_duplicate_state)
|
|
crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
|
|
else {
|
|
if (!crtc->state)
|
|
drm_atomic_helper_crtc_reset(crtc);
|
|
|
|
crtc_state = drm_atomic_helper_crtc_duplicate_state(crtc);
|
|
}
|
|
|
|
if (!crtc_state)
|
|
return -ENOMEM;
|
|
|
|
crtc_state->planes_changed = true;
|
|
crtc_state->mode_changed = true;
|
|
ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
|
|
if (ret)
|
|
goto out;
|
|
drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode);
|
|
|
|
if (crtc_funcs->atomic_check) {
|
|
ret = crtc_funcs->atomic_check(crtc, crtc_state);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
swap(crtc->state, crtc_state);
|
|
|
|
crtc_funcs->mode_set_nofb(crtc);
|
|
|
|
ret = drm_helper_crtc_mode_set_base(crtc, x, y, old_fb);
|
|
|
|
out:
|
|
if (crtc_state) {
|
|
if (crtc->funcs->atomic_destroy_state)
|
|
crtc->funcs->atomic_destroy_state(crtc, crtc_state);
|
|
else
|
|
drm_atomic_helper_crtc_destroy_state(crtc, crtc_state);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_crtc_mode_set);
|
|
|
|
/**
|
|
* drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers
|
|
* @crtc: DRM CRTC
|
|
* @x: x offset of the CRTC scanout area on the underlying framebuffer
|
|
* @y: y offset of the CRTC scanout area on the underlying framebuffer
|
|
* @old_fb: previous framebuffer
|
|
*
|
|
* This function implements a callback useable as the ->mode_set_base used
|
|
* required by the CRTC helpers. The driver must provide the atomic plane helper
|
|
* functions for the primary plane.
|
|
*
|
|
* This is a transitional helper useful for converting drivers to the atomic
|
|
* interfaces.
|
|
*/
|
|
int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
|
|
struct drm_framebuffer *old_fb)
|
|
{
|
|
struct drm_plane_state *plane_state;
|
|
struct drm_plane *plane = crtc->primary;
|
|
|
|
if (plane->funcs->atomic_duplicate_state)
|
|
plane_state = plane->funcs->atomic_duplicate_state(plane);
|
|
else {
|
|
if (!plane->state)
|
|
drm_atomic_helper_plane_reset(plane);
|
|
|
|
plane_state = drm_atomic_helper_plane_duplicate_state(plane);
|
|
}
|
|
if (!plane_state)
|
|
return -ENOMEM;
|
|
plane_state->plane = plane;
|
|
|
|
plane_state->crtc = crtc;
|
|
drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb);
|
|
plane_state->crtc_x = 0;
|
|
plane_state->crtc_y = 0;
|
|
plane_state->crtc_h = crtc->mode.vdisplay;
|
|
plane_state->crtc_w = crtc->mode.hdisplay;
|
|
plane_state->src_x = x << 16;
|
|
plane_state->src_y = y << 16;
|
|
plane_state->src_h = crtc->mode.vdisplay << 16;
|
|
plane_state->src_w = crtc->mode.hdisplay << 16;
|
|
|
|
return drm_plane_helper_commit(plane, plane_state, old_fb);
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_crtc_mode_set_base);
|