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![Jyri Sarha](/assets/img/avatar_default.png)
Add drm_crtc_enable_color_mgmt(), remove drm_helper_crtc_enable_color_mgmt() and update drm/i915-driver (the only user of the old function). The new function is more flexible. It allows driver to enable only the features it has without forcing to enable all three color management properties: degamma lut, csc matrix (ctm), and gamma lut. Suggested-by: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Jyri Sarha <jsarha@ti.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
1123 lines
34 KiB
C
1123 lines
34 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_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 ->dpms() even though the hardware is
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* already in the desired state. This deficiency has been fixed in the atomic
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* 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_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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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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/**
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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_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_for_each_connector(connector, dev)
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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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/**
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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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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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|
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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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|
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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);
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|
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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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|
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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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if (encoder->crtc != crtc)
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continue;
|
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|
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drm_for_each_connector(connector, dev) {
|
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if (connector->encoder != encoder)
|
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continue;
|
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|
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connector->encoder = NULL;
|
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|
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/*
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* 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.
|
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*/
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connector->dpms = DRM_MODE_DPMS_OFF;
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|
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/* we keep a reference while the encoder is bound */
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drm_connector_unreference(connector);
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}
|
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}
|
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|
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__drm_helper_disable_unused_functions(dev);
|
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}
|
|
|
|
/**
|
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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 set_config
|
|
* callback of struct &drm_crtc_funcs for drivers using the legacy CRTC helpers.
|
|
*
|
|
* It first tries to locate the best encoder for each connector by calling the
|
|
* connector ->best_encoder() (struct &drm_connector_helper_funcs) 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 ->mode_set_base() (struct &drm_crtc_helper_funcs) 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 *new_crtc;
|
|
struct drm_encoder *save_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 *save_connectors, *connector;
|
|
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_encoders = kzalloc(dev->mode_config.num_encoder *
|
|
sizeof(struct drm_encoder), GFP_KERNEL);
|
|
if (!save_encoders)
|
|
return -ENOMEM;
|
|
|
|
save_connectors = kzalloc(dev->mode_config.num_connector *
|
|
sizeof(struct drm_connector), GFP_KERNEL);
|
|
if (!save_connectors) {
|
|
kfree(save_encoders);
|
|
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_encoders[count++] = *encoder;
|
|
}
|
|
|
|
count = 0;
|
|
drm_for_each_connector(connector, dev) {
|
|
save_connectors[count++] = *connector;
|
|
}
|
|
|
|
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->pixel_format !=
|
|
set->crtc->primary->fb->pixel_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 connectors in set */
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
drm_connector_reference(set->connectors[ro]);
|
|
}
|
|
|
|
/* a) traverse passed in connector list and get encoders for them */
|
|
count = 0;
|
|
drm_for_each_connector(connector, dev) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
if (fail) {
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
count = 0;
|
|
drm_for_each_connector(connector, dev) {
|
|
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;
|
|
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);
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
/* after fail drop reference on all connectors in save set */
|
|
count = 0;
|
|
drm_for_each_connector(connector, dev) {
|
|
drm_connector_unreference(&save_connectors[count++]);
|
|
}
|
|
|
|
kfree(save_connectors);
|
|
kfree(save_encoders);
|
|
return 0;
|
|
|
|
fail:
|
|
/* Restore all previous data. */
|
|
count = 0;
|
|
drm_for_each_encoder(encoder, dev) {
|
|
*encoder = save_encoders[count++];
|
|
}
|
|
|
|
count = 0;
|
|
drm_for_each_connector(connector, dev) {
|
|
*connector = save_connectors[count++];
|
|
}
|
|
|
|
/* after fail drop reference on all connectors in set */
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
drm_connector_unreference(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_connectors);
|
|
kfree(save_encoders);
|
|
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_device *dev = encoder->dev;
|
|
|
|
drm_for_each_connector(connector, dev)
|
|
if (connector->encoder == encoder)
|
|
if (connector->dpms < dpms)
|
|
dpms = connector->dpms;
|
|
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_device *dev = crtc->dev;
|
|
|
|
drm_for_each_connector(connector, dev)
|
|
if (connector->encoder && connector->encoder->crtc == crtc)
|
|
if (connector->dpms < dpms)
|
|
dpms = connector->dpms;
|
|
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 ->dpms()
|
|
* callback of struct &drm_connector_funcs 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 ->dpms()
|
|
* callbacks provided by the driver in struct &drm_crtc_helper_funcs and struct
|
|
* &drm_encoder_helper_funcs appropriately.
|
|
*
|
|
* 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_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.
|
|
*/
|
|
void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
|
|
const struct drm_mode_fb_cmd2 *mode_cmd)
|
|
{
|
|
int i;
|
|
|
|
fb->width = mode_cmd->width;
|
|
fb->height = mode_cmd->height;
|
|
for (i = 0; i < 4; i++) {
|
|
fb->pitches[i] = mode_cmd->pitches[i];
|
|
fb->offsets[i] = mode_cmd->offsets[i];
|
|
fb->modifier[i] = mode_cmd->modifier[i];
|
|
}
|
|
drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
|
|
&fb->bits_per_pixel);
|
|
fb->pixel_format = mode_cmd->pixel_format;
|
|
fb->flags = mode_cmd->flags;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
|
|
|
|
/**
|
|
* 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);
|