forked from Minki/linux
ff6fdbed8f
Signed-off-by: Maarten Maathuis <madman2003@gmail.com> Signed-off-by: Dave Airlie <airlied@linux.ie>
1147 lines
30 KiB
C
1147 lines
30 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 "drmP.h"
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#include "drm_crtc.h"
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#include "drm_crtc_helper.h"
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/*
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* Detailed mode info for 800x600@60Hz
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*/
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static struct drm_display_mode std_modes[] = {
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{ DRM_MODE("800x600", DRM_MODE_TYPE_DEFAULT, 40000, 800, 840,
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968, 1056, 0, 600, 601, 605, 628, 0,
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DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
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};
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static void drm_mode_validate_flag(struct drm_connector *connector,
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int flags)
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{
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struct drm_display_mode *mode, *t;
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if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
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return;
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list_for_each_entry_safe(mode, t, &connector->modes, head) {
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if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
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!(flags & DRM_MODE_FLAG_INTERLACE))
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mode->status = MODE_NO_INTERLACE;
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if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
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!(flags & DRM_MODE_FLAG_DBLSCAN))
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mode->status = MODE_NO_DBLESCAN;
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}
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return;
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}
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/**
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* drm_helper_probe_connector_modes - get complete set of display modes
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* @dev: DRM device
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* @maxX: max width for modes
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* @maxY: max height for modes
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*
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* LOCKING:
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* Caller must hold mode config lock.
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*
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* Based on @dev's mode_config layout, scan all the connectors and try to detect
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* modes on them. Modes will first be added to the connector's probed_modes
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* list, then culled (based on validity and the @maxX, @maxY parameters) and
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* put into the normal modes list.
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*
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* Intended to be used either at bootup time or when major configuration
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* changes have occurred.
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*
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* FIXME: take into account monitor limits
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*
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* RETURNS:
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* Number of modes found on @connector.
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*/
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int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
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uint32_t maxX, uint32_t maxY)
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{
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struct drm_device *dev = connector->dev;
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struct drm_display_mode *mode, *t;
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struct drm_connector_helper_funcs *connector_funcs =
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connector->helper_private;
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int count = 0;
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int mode_flags = 0;
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DRM_DEBUG_KMS("%s\n", drm_get_connector_name(connector));
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/* set all modes to the unverified state */
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list_for_each_entry_safe(mode, t, &connector->modes, head)
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mode->status = MODE_UNVERIFIED;
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connector->status = connector->funcs->detect(connector);
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if (connector->status == connector_status_disconnected) {
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DRM_DEBUG_KMS("%s is disconnected\n",
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drm_get_connector_name(connector));
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/* TODO set EDID to NULL */
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return 0;
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}
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count = (*connector_funcs->get_modes)(connector);
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if (!count)
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return 0;
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drm_mode_connector_list_update(connector);
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if (maxX && maxY)
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drm_mode_validate_size(dev, &connector->modes, maxX,
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maxY, 0);
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if (connector->interlace_allowed)
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mode_flags |= DRM_MODE_FLAG_INTERLACE;
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if (connector->doublescan_allowed)
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mode_flags |= DRM_MODE_FLAG_DBLSCAN;
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drm_mode_validate_flag(connector, mode_flags);
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list_for_each_entry_safe(mode, t, &connector->modes, head) {
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if (mode->status == MODE_OK)
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mode->status = connector_funcs->mode_valid(connector,
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mode);
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}
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drm_mode_prune_invalid(dev, &connector->modes, true);
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if (list_empty(&connector->modes))
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return 0;
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drm_mode_sort(&connector->modes);
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DRM_DEBUG_KMS("Probed modes for %s\n",
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drm_get_connector_name(connector));
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list_for_each_entry_safe(mode, t, &connector->modes, head) {
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mode->vrefresh = drm_mode_vrefresh(mode);
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drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
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drm_mode_debug_printmodeline(mode);
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}
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return count;
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}
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EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
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int drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX,
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uint32_t maxY)
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{
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struct drm_connector *connector;
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int count = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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count += drm_helper_probe_single_connector_modes(connector,
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maxX, maxY);
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}
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return count;
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}
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EXPORT_SYMBOL(drm_helper_probe_connector_modes);
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static void drm_helper_add_std_modes(struct drm_device *dev,
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struct drm_connector *connector)
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{
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struct drm_display_mode *mode, *t;
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int i;
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for (i = 0; i < ARRAY_SIZE(std_modes); i++) {
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struct drm_display_mode *stdmode;
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/*
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* When no valid EDID modes are available we end up
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* here and bailed in the past, now we add some standard
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* modes and move on.
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*/
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stdmode = drm_mode_duplicate(dev, &std_modes[i]);
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drm_mode_probed_add(connector, stdmode);
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drm_mode_list_concat(&connector->probed_modes,
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&connector->modes);
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DRM_DEBUG_KMS("Adding mode %s to %s\n", stdmode->name,
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drm_get_connector_name(connector));
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}
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drm_mode_sort(&connector->modes);
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DRM_DEBUG_KMS("Added std modes on %s\n",
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drm_get_connector_name(connector));
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list_for_each_entry_safe(mode, t, &connector->modes, head) {
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mode->vrefresh = drm_mode_vrefresh(mode);
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drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
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drm_mode_debug_printmodeline(mode);
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}
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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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* LOCKING:
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* Caller must hold mode config lock.
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*
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* Walk @encoders's DRM device's mode_config and see if it's in use.
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*
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* RETURNS:
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* True if @encoder is part of the mode_config, 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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list_for_each_entry(connector, &dev->mode_config.connector_list, head)
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if (connector->encoder == encoder)
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return true;
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return false;
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}
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EXPORT_SYMBOL(drm_helper_encoder_in_use);
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/**
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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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* LOCKING:
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* Caller must hold mode config lock.
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*
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* Walk @crtc's DRM device's mode_config and see if it's in use.
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*
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* RETURNS:
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* True if @crtc is part of the mode_config, 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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/* FIXME: Locking around list access? */
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
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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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/**
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* drm_disable_unused_functions - disable unused objects
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* @dev: DRM device
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*
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* LOCKING:
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* Caller must hold mode config lock.
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*
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* If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
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* by calling its dpms function, which should power it off.
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*/
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void drm_helper_disable_unused_functions(struct drm_device *dev)
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{
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struct drm_encoder *encoder;
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struct drm_connector *connector;
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struct drm_encoder_helper_funcs *encoder_funcs;
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struct drm_crtc *crtc;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (!connector->encoder)
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continue;
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if (connector->status == connector_status_disconnected)
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connector->encoder = NULL;
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}
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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encoder_funcs = encoder->helper_private;
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if (!drm_helper_encoder_in_use(encoder)) {
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if (encoder_funcs->disable)
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(*encoder_funcs->disable)(encoder);
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else
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(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
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/* disconnector encoder from any connector */
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encoder->crtc = NULL;
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}
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}
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
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crtc->enabled = drm_helper_crtc_in_use(crtc);
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if (!crtc->enabled) {
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crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
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crtc->fb = NULL;
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}
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}
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}
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EXPORT_SYMBOL(drm_helper_disable_unused_functions);
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static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height)
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{
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struct drm_display_mode *mode;
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list_for_each_entry(mode, &connector->modes, head) {
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if (drm_mode_width(mode) > width ||
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drm_mode_height(mode) > height)
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continue;
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if (mode->type & DRM_MODE_TYPE_PREFERRED)
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return mode;
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}
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return NULL;
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}
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static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
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{
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bool enable;
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if (strict) {
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enable = connector->status == connector_status_connected;
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} else {
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enable = connector->status != connector_status_disconnected;
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}
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return enable;
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}
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static void drm_enable_connectors(struct drm_device *dev, bool *enabled)
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{
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bool any_enabled = false;
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struct drm_connector *connector;
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int i = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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enabled[i] = drm_connector_enabled(connector, true);
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DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
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enabled[i] ? "yes" : "no");
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any_enabled |= enabled[i];
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i++;
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}
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if (any_enabled)
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return;
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i = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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enabled[i] = drm_connector_enabled(connector, false);
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i++;
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}
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}
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static bool drm_target_preferred(struct drm_device *dev,
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struct drm_display_mode **modes,
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bool *enabled, int width, int height)
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{
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struct drm_connector *connector;
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int i = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (enabled[i] == false) {
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i++;
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continue;
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}
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DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
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connector->base.id);
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modes[i] = drm_has_preferred_mode(connector, width, height);
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/* No preferred modes, pick one off the list */
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if (!modes[i] && !list_empty(&connector->modes)) {
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list_for_each_entry(modes[i], &connector->modes, head)
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break;
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}
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DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
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"none");
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i++;
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}
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return true;
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}
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static int drm_pick_crtcs(struct drm_device *dev,
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struct drm_crtc **best_crtcs,
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struct drm_display_mode **modes,
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int n, int width, int height)
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{
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int c, o;
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struct drm_connector *connector;
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struct drm_connector_helper_funcs *connector_funcs;
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struct drm_encoder *encoder;
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struct drm_crtc *best_crtc;
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int my_score, best_score, score;
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struct drm_crtc **crtcs, *crtc;
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if (n == dev->mode_config.num_connector)
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return 0;
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c = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (c == n)
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break;
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c++;
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}
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best_crtcs[n] = NULL;
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best_crtc = NULL;
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best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height);
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if (modes[n] == NULL)
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return best_score;
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crtcs = kmalloc(dev->mode_config.num_connector *
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sizeof(struct drm_crtc *), GFP_KERNEL);
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if (!crtcs)
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return best_score;
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my_score = 1;
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if (connector->status == connector_status_connected)
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my_score++;
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if (drm_has_preferred_mode(connector, width, height))
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my_score++;
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connector_funcs = connector->helper_private;
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encoder = connector_funcs->best_encoder(connector);
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if (!encoder)
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goto out;
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connector->encoder = encoder;
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/* select a crtc for this connector and then attempt to configure
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remaining connectors */
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c = 0;
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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if ((encoder->possible_crtcs & (1 << c)) == 0) {
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c++;
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continue;
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}
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for (o = 0; o < n; o++)
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if (best_crtcs[o] == crtc)
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break;
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if (o < n) {
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/* ignore cloning for now */
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c++;
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continue;
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}
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crtcs[n] = crtc;
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memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *));
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score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1,
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width, height);
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if (score > best_score) {
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best_crtc = crtc;
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best_score = score;
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memcpy(best_crtcs, crtcs,
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dev->mode_config.num_connector *
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sizeof(struct drm_crtc *));
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}
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c++;
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}
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out:
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kfree(crtcs);
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return best_score;
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}
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static void drm_setup_crtcs(struct drm_device *dev)
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{
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struct drm_crtc **crtcs;
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struct drm_display_mode **modes;
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struct drm_encoder *encoder;
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struct drm_connector *connector;
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bool *enabled;
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int width, height;
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int i, ret;
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DRM_DEBUG_KMS("\n");
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width = dev->mode_config.max_width;
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height = dev->mode_config.max_height;
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/* clean out all the encoder/crtc combos */
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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encoder->crtc = NULL;
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}
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crtcs = kcalloc(dev->mode_config.num_connector,
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sizeof(struct drm_crtc *), GFP_KERNEL);
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modes = kcalloc(dev->mode_config.num_connector,
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sizeof(struct drm_display_mode *), GFP_KERNEL);
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enabled = kcalloc(dev->mode_config.num_connector,
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sizeof(bool), GFP_KERNEL);
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drm_enable_connectors(dev, enabled);
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ret = drm_target_preferred(dev, modes, enabled, width, height);
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if (!ret)
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DRM_ERROR("Unable to find initial modes\n");
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DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
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drm_pick_crtcs(dev, crtcs, modes, 0, width, height);
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i = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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struct drm_display_mode *mode = modes[i];
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struct drm_crtc *crtc = crtcs[i];
|
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|
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if (connector->encoder == NULL) {
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i++;
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continue;
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}
|
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|
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if (mode && crtc) {
|
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DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
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mode->name, crtc->base.id);
|
|
crtc->desired_mode = mode;
|
|
connector->encoder->crtc = crtc;
|
|
} else {
|
|
connector->encoder->crtc = NULL;
|
|
connector->encoder = NULL;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
kfree(crtcs);
|
|
kfree(modes);
|
|
kfree(enabled);
|
|
}
|
|
|
|
/**
|
|
* drm_encoder_crtc_ok - can a given crtc drive a given encoder?
|
|
* @encoder: encoder to test
|
|
* @crtc: crtc to test
|
|
*
|
|
* Return false if @encoder can't be driven by @crtc, true otherwise.
|
|
*/
|
|
static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
struct drm_device *dev;
|
|
struct drm_crtc *tmp;
|
|
int crtc_mask = 1;
|
|
|
|
WARN(!crtc, "checking null crtc?");
|
|
|
|
dev = crtc->dev;
|
|
|
|
list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
|
|
if (tmp == crtc)
|
|
break;
|
|
crtc_mask <<= 1;
|
|
}
|
|
|
|
if (encoder->possible_crtcs & crtc_mask)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Check the CRTC we're going to map each output to vs. its current
|
|
* CRTC. If they don't match, we have to disable the output and the CRTC
|
|
* since the driver will have to re-route things.
|
|
*/
|
|
static void
|
|
drm_crtc_prepare_encoders(struct drm_device *dev)
|
|
{
|
|
struct drm_encoder_helper_funcs *encoder_funcs;
|
|
struct drm_encoder *encoder;
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
encoder_funcs = encoder->helper_private;
|
|
/* Disable unused encoders */
|
|
if (encoder->crtc == NULL)
|
|
(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
|
|
/* Disable encoders whose CRTC is about to change */
|
|
if (encoder_funcs->get_crtc &&
|
|
encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
|
|
(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* drm_crtc_set_mode - set a mode
|
|
* @crtc: CRTC to program
|
|
* @mode: mode to use
|
|
* @x: width of mode
|
|
* @y: height of mode
|
|
*
|
|
* LOCKING:
|
|
* Caller must hold mode config lock.
|
|
*
|
|
* Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
|
|
* to fixup or reject the mode prior to trying to set it.
|
|
*
|
|
* RETURNS:
|
|
* True if the mode was set successfully, or false otherwise.
|
|
*/
|
|
bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
|
|
struct drm_display_mode *mode,
|
|
int x, int y,
|
|
struct drm_framebuffer *old_fb)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_display_mode *adjusted_mode, saved_mode;
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
struct drm_encoder_helper_funcs *encoder_funcs;
|
|
int saved_x, saved_y;
|
|
struct drm_encoder *encoder;
|
|
bool ret = true;
|
|
|
|
adjusted_mode = drm_mode_duplicate(dev, mode);
|
|
|
|
crtc->enabled = drm_helper_crtc_in_use(crtc);
|
|
|
|
if (!crtc->enabled)
|
|
return true;
|
|
|
|
saved_mode = crtc->mode;
|
|
saved_x = crtc->x;
|
|
saved_y = crtc->y;
|
|
|
|
/* Update crtc values up front so the driver can rely on them for mode
|
|
* setting.
|
|
*/
|
|
crtc->mode = *mode;
|
|
crtc->x = x;
|
|
crtc->y = y;
|
|
|
|
/* Pass our mode to the connectors and the CRTC to give them a chance to
|
|
* adjust it according to limitations or connector properties, and also
|
|
* a chance to reject the mode entirely.
|
|
*/
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
encoder_funcs = encoder->helper_private;
|
|
if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
|
|
adjusted_mode))) {
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
|
|
goto done;
|
|
}
|
|
|
|
/* Prepare the encoders and CRTCs before setting the mode. */
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
encoder_funcs = encoder->helper_private;
|
|
/* Disable the encoders as the first thing we do. */
|
|
encoder_funcs->prepare(encoder);
|
|
}
|
|
|
|
drm_crtc_prepare_encoders(dev);
|
|
|
|
crtc_funcs->prepare(crtc);
|
|
|
|
/* Set up the DPLL and any encoders state that needs to adjust or depend
|
|
* on the DPLL.
|
|
*/
|
|
ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
|
|
if (!ret)
|
|
goto done;
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
|
|
DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder),
|
|
mode->name, mode->base.id);
|
|
encoder_funcs = encoder->helper_private;
|
|
encoder_funcs->mode_set(encoder, mode, adjusted_mode);
|
|
}
|
|
|
|
/* Now enable the clocks, plane, pipe, and connectors that we set up. */
|
|
crtc_funcs->commit(crtc);
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
|
|
encoder_funcs = encoder->helper_private;
|
|
encoder_funcs->commit(encoder);
|
|
|
|
}
|
|
|
|
/* XXX free adjustedmode */
|
|
drm_mode_destroy(dev, adjusted_mode);
|
|
/* FIXME: add subpixel order */
|
|
done:
|
|
if (!ret) {
|
|
crtc->mode = saved_mode;
|
|
crtc->x = saved_x;
|
|
crtc->y = saved_y;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_crtc_helper_set_mode);
|
|
|
|
|
|
/**
|
|
* drm_crtc_helper_set_config - set a new config from userspace
|
|
* @crtc: CRTC to setup
|
|
* @crtc_info: user provided configuration
|
|
* @new_mode: new mode to set
|
|
* @connector_set: set of connectors for the new config
|
|
* @fb: new framebuffer
|
|
*
|
|
* LOCKING:
|
|
* Caller must hold mode config lock.
|
|
*
|
|
* Setup a new configuration, provided by the user in @crtc_info, and enable
|
|
* it.
|
|
*
|
|
* RETURNS:
|
|
* Zero. (FIXME)
|
|
*/
|
|
int drm_crtc_helper_set_config(struct drm_mode_set *set)
|
|
{
|
|
struct drm_device *dev;
|
|
struct drm_crtc *save_crtcs, *new_crtc, *crtc;
|
|
struct drm_encoder *save_encoders, *new_encoder, *encoder;
|
|
struct drm_framebuffer *old_fb = NULL;
|
|
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;
|
|
struct drm_crtc_helper_funcs *crtc_funcs;
|
|
int ret = 0;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
if (!set)
|
|
return -EINVAL;
|
|
|
|
if (!set->crtc)
|
|
return -EINVAL;
|
|
|
|
if (!set->crtc->helper_private)
|
|
return -EINVAL;
|
|
|
|
crtc_funcs = set->crtc->helper_private;
|
|
|
|
DRM_DEBUG_KMS("crtc: %p %d fb: %p connectors: %p num_connectors:"
|
|
" %d (x, y) (%i, %i)\n",
|
|
set->crtc, set->crtc->base.id, set->fb, set->connectors,
|
|
(int)set->num_connectors, set->x, set->y);
|
|
|
|
dev = set->crtc->dev;
|
|
|
|
/* Allocate space for the backup of all (non-pointer) crtc, encoder and
|
|
* connector data. */
|
|
save_crtcs = kzalloc(dev->mode_config.num_crtc *
|
|
sizeof(struct drm_crtc), GFP_KERNEL);
|
|
if (!save_crtcs)
|
|
return -ENOMEM;
|
|
|
|
save_encoders = kzalloc(dev->mode_config.num_encoder *
|
|
sizeof(struct drm_encoder), GFP_KERNEL);
|
|
if (!save_encoders) {
|
|
kfree(save_crtcs);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
save_connectors = kzalloc(dev->mode_config.num_connector *
|
|
sizeof(struct drm_connector), GFP_KERNEL);
|
|
if (!save_connectors) {
|
|
kfree(save_crtcs);
|
|
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;
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
save_crtcs[count++] = *crtc;
|
|
}
|
|
|
|
count = 0;
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
save_encoders[count++] = *encoder;
|
|
}
|
|
|
|
count = 0;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
save_connectors[count++] = *connector;
|
|
}
|
|
|
|
/* We should be able to check here if the fb has the same properties
|
|
* and then just flip_or_move it */
|
|
if (set->crtc->fb != set->fb) {
|
|
/* If we have no fb then treat it as a full mode set */
|
|
if (set->crtc->fb == NULL) {
|
|
DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
|
|
mode_changed = true;
|
|
} else if (set->fb == NULL) {
|
|
mode_changed = true;
|
|
} else if ((set->fb->bits_per_pixel !=
|
|
set->crtc->fb->bits_per_pixel) ||
|
|
set->fb->depth != set->crtc->fb->depth)
|
|
fb_changed = true;
|
|
else
|
|
fb_changed = true;
|
|
}
|
|
|
|
if (set->x != set->crtc->x || set->y != set->crtc->y)
|
|
fb_changed = true;
|
|
|
|
if (set->mode && !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;
|
|
}
|
|
|
|
/* a) traverse passed in connector list and get encoders for them */
|
|
count = 0;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
struct drm_connector_helper_funcs *connector_funcs =
|
|
connector->helper_private;
|
|
new_encoder = connector->encoder;
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
if (set->connectors[ro] == connector) {
|
|
new_encoder = connector_funcs->best_encoder(connector);
|
|
/* if we can't get an encoder for a connector
|
|
we are setting now - then fail */
|
|
if (new_encoder == NULL)
|
|
/* don't break so fail path works correct */
|
|
fail = 1;
|
|
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;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
if (!connector->encoder)
|
|
continue;
|
|
|
|
if (connector->encoder->crtc == set->crtc)
|
|
new_crtc = NULL;
|
|
else
|
|
new_crtc = connector->encoder->crtc;
|
|
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
if (set->connectors[ro] == connector)
|
|
new_crtc = set->crtc;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
DRM_DEBUG_KMS("setting connector %d crtc to %p\n",
|
|
connector->base.id, new_crtc);
|
|
}
|
|
|
|
/* mode_set_base is not a required function */
|
|
if (fb_changed && !crtc_funcs->mode_set_base)
|
|
mode_changed = true;
|
|
|
|
if (mode_changed) {
|
|
old_fb = set->crtc->fb;
|
|
set->crtc->fb = set->fb;
|
|
set->crtc->enabled = (set->mode != NULL);
|
|
if (set->mode != NULL) {
|
|
DRM_DEBUG_KMS("attempting to set mode from"
|
|
" userspace\n");
|
|
drm_mode_debug_printmodeline(set->mode);
|
|
if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
|
|
set->x, set->y,
|
|
old_fb)) {
|
|
DRM_ERROR("failed to set mode on crtc %p\n",
|
|
set->crtc);
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
/* TODO are these needed? */
|
|
set->crtc->desired_x = set->x;
|
|
set->crtc->desired_y = set->y;
|
|
set->crtc->desired_mode = set->mode;
|
|
}
|
|
drm_helper_disable_unused_functions(dev);
|
|
} else if (fb_changed) {
|
|
old_fb = set->crtc->fb;
|
|
if (set->crtc->fb != set->fb)
|
|
set->crtc->fb = set->fb;
|
|
ret = crtc_funcs->mode_set_base(set->crtc,
|
|
set->x, set->y, old_fb);
|
|
if (ret != 0)
|
|
goto fail;
|
|
}
|
|
|
|
kfree(save_connectors);
|
|
kfree(save_encoders);
|
|
kfree(save_crtcs);
|
|
return 0;
|
|
|
|
fail:
|
|
/* Restore all previous data. */
|
|
count = 0;
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
*crtc = save_crtcs[count++];
|
|
}
|
|
|
|
count = 0;
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
*encoder = save_encoders[count++];
|
|
}
|
|
|
|
count = 0;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
*connector = save_connectors[count++];
|
|
}
|
|
|
|
kfree(save_connectors);
|
|
kfree(save_encoders);
|
|
kfree(save_crtcs);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_crtc_helper_set_config);
|
|
|
|
bool drm_helper_plugged_event(struct drm_device *dev)
|
|
{
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
drm_helper_probe_connector_modes(dev, dev->mode_config.max_width,
|
|
dev->mode_config.max_height);
|
|
|
|
drm_setup_crtcs(dev);
|
|
|
|
/* alert the driver fb layer */
|
|
dev->mode_config.funcs->fb_changed(dev);
|
|
|
|
/* FIXME: send hotplug event */
|
|
return true;
|
|
}
|
|
/**
|
|
* drm_initial_config - setup a sane initial connector configuration
|
|
* @dev: DRM device
|
|
*
|
|
* LOCKING:
|
|
* Called at init time, must take mode config lock.
|
|
*
|
|
* Scan the CRTCs and connectors and try to put together an initial setup.
|
|
* At the moment, this is a cloned configuration across all heads with
|
|
* a new framebuffer object as the backing store.
|
|
*
|
|
* RETURNS:
|
|
* Zero if everything went ok, nonzero otherwise.
|
|
*/
|
|
bool drm_helper_initial_config(struct drm_device *dev)
|
|
{
|
|
struct drm_connector *connector;
|
|
int count = 0;
|
|
|
|
count = drm_helper_probe_connector_modes(dev,
|
|
dev->mode_config.max_width,
|
|
dev->mode_config.max_height);
|
|
|
|
/*
|
|
* None of the available connectors had any modes, so add some
|
|
* and try to light them up anyway
|
|
*/
|
|
if (!count) {
|
|
DRM_ERROR("connectors have no modes, using standard modes\n");
|
|
list_for_each_entry(connector,
|
|
&dev->mode_config.connector_list,
|
|
head)
|
|
drm_helper_add_std_modes(dev, connector);
|
|
}
|
|
|
|
drm_setup_crtcs(dev);
|
|
|
|
/* alert the driver fb layer */
|
|
dev->mode_config.funcs->fb_changed(dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_initial_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;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
|
|
if (connector->encoder == encoder)
|
|
if (connector->dpms < dpms)
|
|
dpms = connector->dpms;
|
|
return dpms;
|
|
}
|
|
|
|
static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
|
|
{
|
|
int dpms = DRM_MODE_DPMS_OFF;
|
|
struct drm_connector *connector;
|
|
struct drm_device *dev = crtc->dev;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
|
|
if (connector->encoder && connector->encoder->crtc == crtc)
|
|
if (connector->dpms < dpms)
|
|
dpms = connector->dpms;
|
|
return dpms;
|
|
}
|
|
|
|
/**
|
|
* drm_helper_connector_dpms
|
|
* @connector affected connector
|
|
* @mode DPMS mode
|
|
*
|
|
* Calls the low-level connector DPMS function, then
|
|
* calls appropriate encoder and crtc DPMS functions as well
|
|
*/
|
|
void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
|
|
{
|
|
struct drm_encoder *encoder = connector->encoder;
|
|
struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
|
|
int old_dpms;
|
|
|
|
if (mode == connector->dpms)
|
|
return;
|
|
|
|
old_dpms = connector->dpms;
|
|
connector->dpms = mode;
|
|
|
|
/* from off to on, do crtc then encoder */
|
|
if (mode < old_dpms) {
|
|
if (crtc) {
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
if (crtc_funcs->dpms)
|
|
(*crtc_funcs->dpms) (crtc,
|
|
drm_helper_choose_crtc_dpms(crtc));
|
|
}
|
|
if (encoder) {
|
|
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
|
|
if (encoder_funcs->dpms)
|
|
(*encoder_funcs->dpms) (encoder,
|
|
drm_helper_choose_encoder_dpms(encoder));
|
|
}
|
|
}
|
|
|
|
/* from on to off, do encoder then crtc */
|
|
if (mode > old_dpms) {
|
|
if (encoder) {
|
|
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
|
|
if (encoder_funcs->dpms)
|
|
(*encoder_funcs->dpms) (encoder,
|
|
drm_helper_choose_encoder_dpms(encoder));
|
|
}
|
|
if (crtc) {
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
if (crtc_funcs->dpms)
|
|
(*crtc_funcs->dpms) (crtc,
|
|
drm_helper_choose_crtc_dpms(crtc));
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_connector_dpms);
|
|
|
|
/**
|
|
* drm_hotplug_stage_two
|
|
* @dev DRM device
|
|
* @connector hotpluged connector
|
|
*
|
|
* LOCKING.
|
|
* Caller must hold mode config lock, function might grab struct lock.
|
|
*
|
|
* Stage two of a hotplug.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, errno on failure.
|
|
*/
|
|
int drm_helper_hotplug_stage_two(struct drm_device *dev)
|
|
{
|
|
drm_helper_plugged_event(dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_hotplug_stage_two);
|
|
|
|
int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
|
|
struct drm_mode_fb_cmd *mode_cmd)
|
|
{
|
|
fb->width = mode_cmd->width;
|
|
fb->height = mode_cmd->height;
|
|
fb->pitch = mode_cmd->pitch;
|
|
fb->bits_per_pixel = mode_cmd->bpp;
|
|
fb->depth = mode_cmd->depth;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
|
|
|
|
int drm_helper_resume_force_mode(struct drm_device *dev)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
int ret;
|
|
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
|
|
if (!crtc->enabled)
|
|
continue;
|
|
|
|
ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
|
|
crtc->x, crtc->y, crtc->fb);
|
|
|
|
if (ret == false)
|
|
DRM_ERROR("failed to set mode on crtc %p\n", crtc);
|
|
}
|
|
/* disable the unused connectors while restoring the modesetting */
|
|
drm_helper_disable_unused_functions(dev);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_resume_force_mode);
|