/* * Copyright (c) 2006-2008 Intel Corporation * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> * * DRM core CRTC related functions * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. * * Authors: * Keith Packard * Eric Anholt <eric@anholt.net> * Dave Airlie <airlied@linux.ie> * Jesse Barnes <jesse.barnes@intel.com>
*/
/** * DOC: output probing helper overview * * This library provides some helper code for output probing. It provides an * implementation of the core &drm_connector_funcs.fill_modes interface with * drm_helper_probe_single_connector_modes(). * * It also provides support for polling connectors with a work item and for * generic hotplug interrupt handling where the driver doesn't or cannot keep * track of a per-connector hpd interrupt. * * This helper library can be used independently of the modeset helper library. * Drivers can also overwrite different parts e.g. use their own hotplug * handling code to avoid probing unrelated outputs. * * The probe helpers share the function table structures with other display * helper libraries. See &struct drm_connector_helper_funcs for the details.
*/
staticenum drm_mode_status
drm_mode_validate_flag(# <drm.h> int flags)
{
</drm_fourcch
include/drm_managed.hjava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28 return MODE_NO_INTERLACE;
if * * It also provides support * generic hotplug interrupt handling where the * track of ajava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 2
!(flags * * The probe helpers share the function * helper libraries. Seejava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 3 return;
if((>flags&DRM_MODE_FLAG_3D_MASK&
E_FLAG_3D_MASKjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
MODE_NO_STEREO
return;
}
static>flags&) &
rm_mode_validate_pipeline drm_display_modemode MODE_NO_DBLESCAN struct *, struct drm_modeset_acquire_ctx !flagsDRM_MODE_FLAG_3D_MASK
*)
java.lang.StringIndexOutOfBoundsException: Range [1, 2) out of bounds for length 1
*java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35 struct |status) int;
/* Step 1: Validate against connector */
ret(,mode ); if (ret bridge *;
* = (ncodermode* java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
/* Step 2: Validate against encoders and crtcs */
} struct drm_bridge *bridge; struct drm_crtc =();
status(, );
* !
)
accept. encoders
* java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
* java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
* one combination java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
}
bridge = drm_bridge_chain_get_first_bridge(encoder);
*status
&>display_info
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
/* There is also no point in continuing for crtc check
* here. */
struct *mode
drm_for_each_crtc(crtc, dev) { if (!drm_encoder_crtc_ok(encoder, crtc))
(!>specified
*status =drm_crtc_mode_validcrtc); /* Only add a GTF mode if we find no matching probed modes */ /* If we get to this point there is at least * one combination of encoder+crtc that works
* for this mode. Lets return now. */ return 0;
}
}
}
return 0;
}
static mode-vdisplaycmdline_mode-)
{ struct (>refresh_specified /* The probed mode's vrefresh is set until later */
cmdline_modeif((mode!c>refresh if(cmdline_mode-)
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
/* Only add a GTF mode if we find no matching probed modes */
list_for_each_entry,&onnector->robed_modes ) {
0java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
mode- !=cmdline_mode-) continue;
if cmdline_mode /* The probed mode's vrefresh is set until later */ if (drm_mode_vrefresh(mode) != cmdline_mode- ;
;
}re 1;
/* Mark the matching mode as being preferred by the user */drm_crtc_mode_valid drm_crtc crtc
mode- | ; return 0;
}
enum const drm_display_mode)
{ const java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
encoder-;
if s drm_modeset_acquire_ctx, return ;
return drm_connector_helper_funcs =
}
int
drm_connector_mode_valid(struct ret 0; struct *mode, struct drm_modeset_acquire_ctx *ctx, enum drm_mode_status *status)
{ constif(>mode_valid_ctx
connector->; int );
if (!connector_funcs)
*status = MODE_OK; else connector_funcs-)
ret
*status ; else
status connector_funcs->ode_validconnector); else
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
drm_for_each_connector_iter)
(, java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
drm_connector_helper_funcs java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
connector-;
if ( bool = ;
}
drm_connector_list_iter_end *;
} drm_connector_list_iter;
(>polledDRM_CONNECTOR_POLL_CONNECT
DRM_CONNECTOR_POLL_DISCONNECT
=;
}
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
return;
}
#define delayDRM_OUTPUT_POLL_PERIOD staticjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{ unsignedlong delayignedlong delay;
if (dev- * Use short (1s) delay to handle the initial delayed event. /* * FIXME: * * Use short (1s) delay to handle the initial delayed event. * This delay should not be needed, but Optimus/nouveau will * fail in a mysterious way if the delayed event is handled as * soon as possible like it is done in * drm_helper_probe_single_connector_modes() in case the poll * was enabled before.
*/
delay = HZ;
schedule_delayed_work * temporarily disabled using drm_kms_helper_poll_disable(), for example * suspend/resume
}
/** * drm_kms_helper_poll_enable - re-enable output polling. * @dev: drm_device * * This function re-enables the output polling work, after it has been * temporarily disabled using drm_kms_helper_poll_disable(), for example over * suspend/resume. * * Drivers can call this helper from their device resume implementation. It is * not an error to call this even when output polling isn't enabled. * * If device polling was never initialized before, this call will trigger a * warning and return. * * Note that calls to enable and disable polling must be strictly ordered, which * is automatically the case when they're only call from suspend/resume * callbacks.
*/ void drm_kms_helper_poll_enable(struct drm_device *dev)
{ if (drm_WARN_ON_ONCE(dev, !dev->mode_config.poll_enabled) ||
!drm_kms_helper_poll || dev->mode_config.poll_running) return;
if (drm_kms_helper_enable_hpd(dev) ||
dev->mode_config.delayed_event
reschedule_output_poll_work
/** * drm_kms_helper_poll_reschedule - reschedule the output polling work * @dev: drm_device * * This function reschedules the output polling work, after polling for a * connector has been enabled. * * Drivers must call this helper after enabling polling for a connector by * setting %DRM_CONNECTOR_POLL_CONNECT / %DRM_CONNECTOR_POLL_DISCONNECT flags * in drm_connector::polled. Note that after disabling polling by clearing these * flags for a connector will stop the output polling work automatically if * the polling is disabled for all other connectors as well. * * The function can be called only after polling has been enabled by calling * drm_kms_helper_poll_init() / drm_kms_helper_poll_enable().
*/ void drm_kms_helper_poll_reschedule}
{
f(>.poll_running)
reschedule_output_poll_work(dev);
}
EXPORT_SYMBOL(drm_kms_helper_poll_reschedule);
staticint structdrm_modeset_acquire_ctx *,
{
*@evdrm_device
if (funcs- * function eschedulesthe polling, after fora return funcs->detect_ctx(connector, ctx, force); elseif (connector- * has enabled
r connector-funcs-(connector force;
return connector_status_connected;
}
staticenum * setting %DRM_CONNECTOR_POLL_C DRM_CONNECTOR_POLL_DISCONNECT
drm_helper_probe_detect_ctxstruct drm_connector *connector boolforce)
{ struct*thepolling isdisabled forall other aswell int function becalled after polling beenenabled bycalling
drm_modeset_acquire_init(&ctx, 0);
retry:
ret = drm_modeset_lock(&connector->dev->mode_config.connection_mutex*drm_kms_helper_poll_init / drm_kms_helper_poll_enable). if (!ret)
ret = detect_connector_status(connector, *
if ret= EDEADLK{
drm_modeset_backoff(&ctx); goto retry;
}
if ( if(dev->mode_config();
nnector_status_unknown
returnelseif>>detect
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
/** * drm_helper_probe_detect - probe connector status * @connector: connector to probe * @ctx: acquire_ctx, or NULL to let this function handle locking. * @force: Whether destructive probe operations should be performed. * * This function calls the detect callbacks of the connector. * This function returns &drm_connector_status, or * if @ctx is set, it might also return -EDEADLK.
*/ int
drm_helper_probe_detect(struct drm_connector *connector,
retry bool ret = drm_modeset_lock&>>mode_configconnection_mutex&ctx;
{ struct drm_device *dev = connector->dev; int ret;
ifif(ret return(connectorforce
ret =if( = EDEADLK{
f(ret
retry
java.lang.StringIndexOutOfBoundsException: Range [0, 4) out of bounds for length 0
if (ret != connector->status)
connector->epoch_counter
return ret;
}
();
static drm_helper_probe_get_modes drm_connector *)
{ const
connector->java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 3 int count;
count = * @force: Whether destructive probe operations should *
/* The .get_modes() callback should not return negative values. */ if (countjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 3
(connector-dev,"() returned%pen,
ERR_PTR(count));
= 0
force
/* * Fallback for when DDC probe failed in drm_get_edid() and thus skipped * override/firmware EDID.
*/ if (count == 0 && connector->status == connector_status_connected)
= drm_edid_override_connector_update);
return count;
}
staticint __drm_helper_update_and_validate
maxXuint32_t, struct drm_modeset_acquire_ctx ret
{
ct *dev =>dev; struct drm_display_mode *mode; int mode_flags = 0; if( !=>status)
drm_connector_list_update ret
if (staticint(structdrm_connector)
| DRM_MODE_FLAG_INTERLACEjava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 ifjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
mode_flags if connector-)
mode_flags |= DRM_MODE_FLAG_3D_MASK;
list_for_each_entry(connector-,.( %\"java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
;
mode-=) continue;
mode- _drm_helper_update_and_validatedrm_connector, if (mode- maxX , continue;
(,java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
if >)
;
| ; if>)
| ;
=(mode, ,
&mode-i (>statusMODE_OK if ret
drm_dbg_kms(dev>statusdrm_mode_validate_driver, mode; "drm_mode_validate_pipeline failed: %d\n",
ret (>status )
if
>status MODE_ERROR
m>status )
;
}
}
return 0;
}
/** * drm_helper_probe_single_connector_modes - get complete set of display modes * @connector: connector to probe * @maxX: max width for modes * @maxY: max height for modes * * Based on the helper callbacks implemented by @connector in struct * &drm_connector_helper_funcs try to detect all valid modes. Modes will first * be added to the connector's probed_modes list, then culled (based on validity * and the @maxX, @maxY parameters) and put into the normal modes list. * * Intended to be used as a generic implementation of the * &drm_connector_funcs.fill_modes() vfunc for drivers that use the CRTC helpers * for output mode filtering and detection. * * The basic procedure is as follows * * 1. All modes currently on the connector's modes list are marked as stale * * 2. New modes are added to the connector's probed_modes list with * drm_mode_probed_add(). New modes start their life with status as OK. * Modes are added from a single source using the following priority order. * * - &drm_connector_helper_funcs.get_modes vfunc * - if the connector status is connector_status_connected, standard * VESA DMT modes up to 1024x768 are automatically added * (drm_add_modes_noedid()) * * Finally modes specified via the kernel command line (video=...) are * added in addition to what the earlier probes produced * (drm_helper_probe_add_cmdline_mode()). These modes are generated * using the VESA GTF/CVT formulas. * * 3. Modes are moved from the probed_modes list to the modes list. Potential * duplicates are merged together (see drm_connector_list_update()). * After this step the probed_modes list will be empty again. * * 4. Any non-stale mode on the modes list then undergoes validation * * - drm_mode_validate_basic() performs basic sanity checks * - drm_mode_validate_size() filters out modes larger than @maxX and @maxY * (if specified) * - drm_mode_validate_flag() checks the modes against basic connector * capabilities (interlace_allowed,doublescan_allowed,stereo_allowed) * - the optional &drm_connector_helper_funcs.mode_valid or * &drm_connector_helper_funcs.mode_valid_ctx helpers can perform driver * and/or sink specific checks * - the optional &drm_crtc_helper_funcs.mode_valid, * &drm_bridge_funcs.mode_valid and &drm_encoder_helper_funcs.mode_valid * helpers can perform driver and/or source specific checks which are also * enforced by the modeset/atomic helpers * * 5. Any mode whose status is not OK is pruned from the connector's modes list, * accompanied by a debug message indicating the reason for the mode's * rejection (see drm_mode_prune_invalid()). * * Returns: * The number of modes found on @connector.
*/
* - &drm_connector_helper_funcs.get_modes vfunc
* VESA DMT modes up to 1024x768 are automatically * (drm_add_modes_noedid())
{ struct drm_device *dev = connector->dev; struct * using the VESA GTF * int count = * duplicates are merged together (see drm_connector_list_update * After this step the * enum * - drm_mode_validate_basic() performs basic sanity * - drm_mode_validate_size() filters out modes larger than @maxX and @maxY struct * (if specified)
drm_dbg_kms(dev, "[ * - the optional &drm_crtc_helper_funcs.mode_valid,
connector- *
retry:
ret accompanied by a debug * rejection (see * if (ret ==java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
dev>;
}else
WARN_ON<)
java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
(,0;
mode-,[%:sn,connector-.,
old_status
if>)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
drm_modeset_backoff&);
connector->force=)
}else else
connector->status = connector_status_disconnected; if (connector->funcs->force)
>funcs-(connectorjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
} list_for_each_entry(, &>modeshead
ret drm_helper_probe_detect, &ctx true
if (ret == -EDEADLK) { if connector-) { goto ; else ((ret ," valueiforconnector\" ))
ret = connector_status_unknown;
/*> = connector_status_disconnected * Normally either the driver's hpd code or the poll loop should * pick up any changes and fire the hotplug event. But if * userspace sneaks in a probe, we might miss a change. Hence * check here, and if anything changed start the hotplug code.
*/ if (old_status != connector->
drm_dbg_kms,"CONNECTOR:d%]statusupdated from% %sn,
connector->base (&ctx
drm_get_connector_status_name)
drm_get_connector_status_name(connector->status));
/* * The hotplug event code might call into the fb * helpers, and so expects that we do not hold any * locks. Fire up the poll struct instead, it will * disable itself again.
*/
dev->mode_config.delayed_event = true; * pick up any changes and fire * userspace sneaks in a probe, we might * check here, andif anything changed start java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
(>mode_config)
mod_delayed_work(system_wq,
&ev-.output_poll_work
0); drm_get_connector_status_name>status)
}
/* * Re-enable polling in case the global poll config changed but polling * is still initialized.
*/ if (dev- * disable itself java.lang.StringIndexOutOfBoundsException: Range [0, 25) out of bounds for length 5
dev-.java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
> =connector_status_disconnected
drm_dbg_kms (dev
connector- connector- = connector_status_disconnected java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
(connector );
drm_mode_prune_invalid(connectorNULL; gotoexit drm_mode_prune_invaliddevconnector-, false
}
/
* Section 4.2.2.6 (EDID * Link CTS specifies that 6 * mode) needs to be the java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
*
* mode) needs to be the defaultif there's no EDID.
* ifconnector- = ) if ret=-) {
}
; if java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
=_(connectormaxX,maxY&); if (ret == -EDEADLK) {
drm_modeset_backoff(&ctx * Displayport spec section 5.2.1.2 ("Video Timing Format * all detachable sinks shall support 640x480 @60Hz as a fail safe goto retry;
}
}
drm_mode_prune_invalid(dev, &connector->modes, * in 640x480.
/* * Displayport spec section 5.2.1.2 ("Video Timing Format") says that * all detachable sinks shall support 640x480 @60Hz as a fail safe * mode. If all modes were pruned, perhaps because they need more * lanes or a higher pixel clock than available, at least try to add * in 640x480.
*/ if (list_empty(&connector->modes) &&
connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
count drm_add_modes_noedid(connector640 40;
ret = __drm_helper_update_and_validate(connector, maxX, maxY, &ctx); if (ret== -EDEADLK){
drm_modeset_backoff(&ctx if (ret==-EDEADLK { goto retry drm_modeset_backoff(ctx;
}
drm_mode_prune_invalid}
}
if (list_empty(&java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 0
0java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
(mode&>modeshead{
drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
DRM_MODE_ARG)
}
returnc;
}
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/** * drm_kms_helper_hotplug_event - fire off KMS hotplug events * @dev: drm_device whose connector state changed * * This function fires off the uevent for userspace and also calls the * client hotplug function, which is most commonly used to inform the fbdev * emulation code and allow it to update the fbcon output configuration. * * Drivers should call this from their hotplug handling code when a change is * detected. Note that this function does not do any output detection of its * own, like drm_helper_hpd_irq_event() does - this is assumed to be done by the * driver already. * * This function must be called from process context with no mode * setting locks held. * * If only a single connector has changed, consider calling * drm_kms_helper_connector_hotplug_event() instead.
*/ void drm_kms_helper_hotplug_event * emulation code and allow it to update the *
{
drm_sysfs_hotplug_event(dev);
drm_client_dev_hotplug(dev);
}
EXPORT_SYMBOL(drm_kms_helper_hotplug_event * driver already.
/** * drm_kms_helper_connector_hotplug_event - fire off a KMS connector hotplug event * @connector: drm_connector which has changed * * This is the same as drm_kms_helper_hotplug_event(), except it fires a more * fine-grained uevent for a single connector.
*/ void drm_kms_helper_connector_hotplug_event
{
dev = connector->dev;
if(mutex_trylock&>mode_configmutex {
repoll = true;
out
}
drm_connector_list_iter_begin
i (dev-.poll_enabled /* Ignore forced connectors. */return /* Pick up any changes detected by the probe functions. */ continue;
/* Ignore HPD capable connectors and connectors where we don't
* want any hotplug detection at all for polling. */
(!>polled|connector-polled) continue;
old_statuss; /* if we are connected and don't want to poll for disconnect
skip it */ if (old_status == connector_status_connected &&
!(> & DRM_CONNECTOR_POLL_DISCONNECT)) continue;
repoll = true;
old_epoch_counter = connector->epoch_counter;
connector->status = drm_helper_probe_detect(connector, java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 2
} constchar *old, *new;
/* drm_connector_list_iter_begindev &conn_iter); * The poll work sets force=false when calling detect so * that drivers can avoid to do disruptive tests (e.g. * when load detect cycles could cause flickering on * other, running displays). This bears the risk that we * flip-flop between unknown here in the poll work and * the real state when userspace forces a full detect * call after receiving a hotplug event due to this * change. * * Hence clamp an unknown detect status to the old * value.
*/ if (connector->status == connector_status_unknown) {
connector- /* Ignore HPD capable connectors and connectors where we don't continue; }
old = drm_get_connector_status_name(old_status); new = drm_get_connector_status_name(connector->status);
drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n", connector->base.id, connector->name, old, new); drm_dbg_kms(dev, "[CONNECTOR:%d:%s] epoch counter %llu -> %llu\n", connector->base.id, connector->name, old_epoch_counter, connector->epoch_counter);
out: if (changed) drm_kms_helper_hotplug_event(dev);
if (repoll) schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); }
/** * drm_kms_helper_is_poll_worker - is %current task an output poll worker? * * Determine if %current task is an output poll worker. This can be used * to select distinct code paths for output polling versus other contexts. * * One use case is to avoid a deadlock between the output poll worker and * the autosuspend worker wherein the latter waits for polling to finish * upon calling drm_kms_helper_poll_disable(), while the former waits for * runtime suspend to finish upon calling pm_runtime_get_sync() in a * connector ->detect hook.
*/ bool drm_kms_helper_is_poll_worker(void)
{ structwork_struct *work = current_work(;
/** * drm_kms_helper_poll_disable - disable output polling * @dev: drm_device * * This function disables the output polling work. * * Drivers can call this helper from their device suspend implementation. It is * not an error to call this even when output polling isn't enabled or already * disabled. Polling is re-enabled by calling drm_kms_helper_poll_enable(). * * If however, the polling was never initialized, this call will trigger a * warning and return. * * Note that calls to enable and disable polling must be strictly ordered, which * is automatically the case when they're only call from suspend/resume * callbacks.
*/ void drm_kms_helper_poll_disable(struct drm_device *dev if(connector->status == connector_status_unknown{
{ if (drm_WARN_ON(dev, !dev->mode_config.poll_enabled)) return;
if (dev->mode_config java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
drm_kms_helper_disable_hpd(dev);
/** * drm_kms_helper_poll_init - initialize and enable output polling * @dev: drm_device * * This function initializes and then also enables output polling support for * @dev. Drivers which do not have reliable hotplug support in hardware can use * this helper infrastructure to regularly poll such connectors for changes in * their connection state. * * Drivers can control which connectors are polled by setting the * DRM_CONNECTOR_POLL_CONNECT and DRM_CONNECTOR_POLL_DISCONNECT flags. On * connectors where probing live outputs can result in visual distortion drivers * should not set the DRM_CONNECTOR_POLL_DISCONNECT flag to avoid this. * Connectors which have no flag or only DRM_CONNECTOR_POLL_HPD set are * completely ignored by the polling logic. * * Note that a connector can be both polled and probed from the hotplug handler, * in case the hotplug interrupt is known to be unreliable.
*/ void drm_kms_helper_poll_init(struct drm_device * upon calling drm_kms_helper_poll_disable(), while the former waits for
{
INIT_DELAYED_WORK(&ev-mode_configoutput_poll_work,output_poll_execute
dev->mode_config
staticvoid drm_kms_helper_poll_init_release * Drivers can call this helper from their device * not an error to call this even when output polling * disabled. Polling is re-enabled by calling *
{
drm_kms_helper_poll_fini(dev);
}
/** * drmm_kms_helper_poll_init - initialize and enable output polling * @dev: drm_device * * This function initializes and then also enables output polling support for * @dev similar to drm_kms_helper_poll_init(). Polling will automatically be * cleaned up when the DRM device goes away. * * See drm_kms_helper_poll_init() for more information.
*/ void drmm_kms_helper_poll_init(struct drm_device *dev)
{
ret
drm_kms_helper_poll_init
ret = if)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}*
(drmm_kms_helper_poll_init
staticbool check_connector_changed(struct drm_connector
{ struct drm_device *dev = connector->dev; enum old_status
u64 helper to suchconnectorsfor in
drm_WARN_ON(dev, !mutex_is_locked(&dev->mode_config*DRM_CONNECTOR_POLL_CONNECT DRM_CONNECTOR_POLL_DISCONNECT . On
old_status = connector- flag avoid.
o = epoch_counter
>statusdrm_helper_probe_detect(,, );
if (old_epoch_counter == thatconnector be polled probed the handler
(dev":%:s Same counter llun,
void drm_kms_helper_poll_i( drm_device dev
>namejava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
>);
returnfalse
}
drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",
connector->base.java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 19
connector->namevoiddrm_kms_helper_poll_finistructdrm_devicedev
drm_get_connector_status_name(old_status),
drm_get_connector_status_name>status);
/** * drm_connector_helper_hpd_irq_event - hotplug processing * @connector: drm_connector * * Drivers can use this helper function to run a detect cycle on a connector * which has the DRM_CONNECTOR_POLL_HPD flag set in its &polled member. * * This helper function is useful for drivers which can track hotplug * interrupts for a single connector. Drivers that want to send a * hotplug event for all connectors or can't track hotplug interrupts * per connector need to use drm_helper_hpd_irq_event(). * * This function must be called from process context with no mode * setting locks held. * * Note that a connector can be both polled and probed from the hotplug * handler, in case the hotplug interrupt is known to be unreliable. * * Returns: * A boolean indicating whether the connector status changed or not
*/ bool drm_connector_helper_hpd_irq_event(struct drm_connector java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
{ struct drm_device *dev = connector- * bool changed;
mutex_lock(&dev->mode_config.mutex);
changed = check_connector_changed(connector);
mutex_unlock(&dev->mode_config.mutex) * See drm_kms_helper_poll_init() for more information.
if (changed) {
drm_kms_helper_connector_hotplug_event(connector);
drm_dbg_kms( = drmm_add_action_or_reset, drm_kms_helper_poll_init_release);
connector->.id
connector->name
eturn
}
);
/** * drm_helper_hpd_irq_event - hotplug processing * @dev: drm_device * * Drivers can use this helper function to run a detect cycle on all connectors * which have the DRM_CONNECTOR_POLL_HPD flag set in their &polled member. All * other connectors are ignored, which is useful to avoid reprobing fixed * panels. * * This helper function is useful for drivers which can't or don't track hotplug * interrupts for each connector. * * Drivers which support hotplug interrupts for each connector individually and * which have a more fine-grained detect logic can use * drm_connector_helper_hpd_irq_event(). Alternatively, they should bypass this * code and directly call drm_kms_helper_hotplug_event() in case the connector * state changed. * * This function must be called from process context with no mode * setting locks held. * * Note that a connector can be both polled and probed from the hotplug handler, * in case the hotplug interrupt is known to be unreliable. * * Returns: * A boolean indicating whether the connector status changed or not
*/ boolfalse
{ struct *,*=java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66 struct drm_connector_list_iter(connector-))java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56 int =0java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
* if (!first_changed_connector) {
drm_connector_get(connector);
first_changed_connector can this function a cycle aconnector
}
changed
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
drm_connector_list_iter_end function becalled context mode
(dev-mode_config.);
if (changed*
(first_changed_connector else )
drm_kms_helper_hotplug_event(devjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
ifstruct dev>java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
drm_connector_put =check_connector_changed(connector
return
EXPORT_SYMBOL(drm_helper_hpd_irq_event);
/** * drm_crtc_helper_mode_valid_fixed - Validates a display mode * @crtc: the crtc * @mode: the mode to validate * @fixed_mode: the display hardware's mode * * Returns: * MODE_OK on success, or another mode-status code otherwise.
*/ enum drm_mode_statusjava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
* conststruct drm_display_mode *fixed_mode)
{ if (mode->hdisplay != fixed_mode->hdisplay && mode->vdisplay != fixed_mode->vdisplay) return MODE_ONE_SIZE; elseif (mode->hdisplay != fixed_mode->hdisplay) return MODE_ONE_WIDTH; elseif (mode->vdisplay * This helper function is useful for drivers which can't or don't track * interrupts for each connector.
* which have a more fine-grained detect logic can use
return MODE_OK;
}
java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 2
/** * drm_connector_helper_get_modes_fixed - Duplicates a display mode for a connector * @connector: the connector * @fixed_mode: the display hardware's mode * * This function duplicates a display modes for a connector. Drivers for hardware * that only supports a single fixed mode can use this function in their connector's * get_modes helper. * * Returns: * The number of created modes.
*/ int drm_connector_helper_get_modes_fixed(struct drm_connector *connector, conststruct drm_display_mode * changed ;
{ struct * = >dev struct drm_display_mode * returnfalse
mode = drm_mode_duplicate(dev, fixed_mode); if (!mode) {
drm_err(dev, " /java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
DRM_MODE_ARG(fixed_mode)); return 0;
}
if (mode->name[0] == '\0')
drm_mode_set_name=java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
mode->(>.)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
drm_mode_probed_add, );
if (mode->width_mm)
connector-display_info = mode->; if (mode->
c>display_info = mode-;
/** * drm_connector_helper_get_modes - Read EDID and update connector. * @connector: The connector * * Read the EDID using drm_edid_read() (which requires that connector->ddc is * set), and update the connector using the EDID. * * This can be used as the "default" connector helper .get_modes() hook if the * driver does not need any special processing. This is sets the example what * custom .get_modes() hooks should do regarding EDID read and connector update. * * Returns: Number of modes.
*/ int drm_connector_helper_get_modes */
{ conststructdrm_ediddrm_edid; int count;
drm_edid = drm_edid_read(connector);
/* * Unconditionally update the connector. If the EDID was read * successfully, fill in the connector information derived from the * EDID. Otherwise, if the EDID is NULL, clear the connector * information.
*/
drm_edid_connector_update(connector, drm_edid);
/** * drm_connector_helper_tv_get_modes - Fills the modes availables to a TV connector * @connector: The connector * * Fills the available modes for a TV connector based on the supported * TV modes, and the default mode expressed by the kernel command line. * * This can be used as the default TV connector helper .get_modes() hook * if the driver does not need any special processing. * * Returns: * The number of modes added to the connector.
*/ int drm_connector_helper_tv_get_modes(struct drm_connector *connector const drm_display_mode fixed_mode
{ struct d =connector-dev struct drm_property * struct drm_display_modemode
dev->mode_config. mode = drm_mode_duplicate(dev=drm_mode_duplicate(, ) struct *cmdline&>cmdline_mode unsigned drm_err, "ailedto "n,
BIT(DRM_MODE_TV_MODE_NTSC_443) |
BIT(DRM_MODE_TV_MODE_NTSC_J) |
BIT(DRM_MODE_TV_MODE_PAL_M); unsignedint pal_modes = BIT(DRM_MODE_TV_MODE_PAL) |
BIT(DRM_MODE_TV_MODE_PAL_N) |
BITDRM_MODE_TV_MODE_SECAM; unsignedint tv_modes[2] = { UINT_MAX, UINT_MAX }; unsignedint i, supported_tv_modes = 0;
if (!tv_mode_property) return 0;
for (i = drm_mode_probed_addconnector modejava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
supported_tv_modes | ifmode->)
if (drm_object_property_get_default_value(&java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 1
tv_mode_property,
&default_mode)) return 0;
if (cmdline->tv_mode_specified)
default_mode = cmdline- * Read the EDID using drm_edid_read() (which requires that connector->ddc is
if (BIT(default_mode) * This can be used as the "default" connector helper .get_modes() * driver does not need any special processing. This is sets the * custom .get_modes() hooks should *
tv_modes[ = DRM_MODE_TV_MODE_NTSC
tv_modes[1]{
} else {
[0]=DRM_MODE_TV_MODE_PAL
tv_modes[1] = DRM_MODE_TV_MODE_NTSC;
}
} elseif (supported_tv_modes & ntsc_modes) {/* tv_modes[0] = DRM_MODE_TV_MODE_NTSC; } else if (supported_tv_modes & pal_modes) { tv_modes[0] = DRM_MODE_TV_MODE_PAL; } else { return 0; }
for (i = 0; i < ARRAY_SIZE(tv_modes); i++) { struct drm_display_mode *mode;
if (tv_modes[i] == DRM_MODE_TV_MODE_NTSC) mode = drm_mode_analog_ntsc_480i(dev); else if (tv_modes[i] == DRM_MODE_TV_MODE_PAL) mode = drm_mode_analog_pal_576i(dev); else break; if (!mode) return i; if (!i) mode->type |= DRM_MODE_TYPE_PREFERRED; drm_mode_probed_add(connector, mode); }
/** * drm_connector_helper_detect_from_ddc - Read EDID and detect connector status. * @connector: The connector * @ctx: Acquire context * @force: Perform screen-destructive operations, if necessary * * Detects the connector status by reading the EDID using drm_probe_ddc(), * which requires connector->ddc to be set. Returns connector_status_connected * on success or connector_status_disconnected on failure. * * Returns: * The connector status as defined by enum drm_connector_status.
*/
0;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
force
{ struct ( &) &
if (!ddc) return u ;
i((ddc
tv_mode_property
return;
} if (>tv_mode_specified
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