Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753608Ab2H1WZk (ORCPT ); Tue, 28 Aug 2012 18:25:40 -0400 Received: from cantor2.suse.de ([195.135.220.15]:48504 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751939Ab2H1WZh (ORCPT ); Tue, 28 Aug 2012 18:25:37 -0400 Date: Tue, 28 Aug 2012 15:25:27 -0700 (PDT) From: Jiri Kosina To: Henrik Rydberg Cc: Benjamin Tissoires , Dmitry Torokhov , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] HID: multitouch: Remove the redundant touch state In-Reply-To: <20120822205832.GA18102@polaris.bitmath.org> Message-ID: References: <1344807757-2217-1-git-send-email-rydberg@euromail.se> <1344807757-2217-20-git-send-email-rydberg@euromail.se> <20120822205832.GA18102@polaris.bitmath.org> User-Agent: Alpine 2.00 (LNX 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10705 Lines: 306 On Wed, 22 Aug 2012, Henrik Rydberg wrote: > With the input_mt_sync_frame() function in place, there is no longer > any need to keep the full touch state in the driver. This patch > removes the slot state and replaces the lookup code with the input-mt > equivalent. The initialization code is moved to mt_input_configured(), > to make sure the full HID report has been seen. > > Signed-off-by: Henrik Rydberg > --- > Hi Benjamin, > > Maybe this patch works better? It has received limited testing so far. What is the status of this patch please? Henrik, Benjamin? > > Henrik > > drivers/hid/hid-multitouch.c | 133 +++++++++++++++---------------------------- > 1 file changed, 46 insertions(+), 87 deletions(-) > > diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c > index c400d90..dc08a4e 100644 > --- a/drivers/hid/hid-multitouch.c > +++ b/drivers/hid/hid-multitouch.c > @@ -56,7 +56,6 @@ struct mt_slot { > __s32 x, y, p, w, h; > __s32 contactid; /* the device ContactID assigned to this slot */ > bool touch_state; /* is the touch valid? */ > - bool seen_in_this_frame;/* has this slot been updated */ > }; > > struct mt_class { > @@ -93,7 +92,7 @@ struct mt_device { > * 1 means we should use a serial protocol > * > 1 means hybrid (multitouch) protocol */ > bool curvalid; /* is the current contact valid? */ > - struct mt_slot *slots; > + unsigned mt_flags; /* flags to pass to input-mt */ > }; > > /* classes of device behavior */ > @@ -134,25 +133,6 @@ static int cypress_compute_slot(struct mt_device *td) > return -1; > } > > -static int find_slot_from_contactid(struct mt_device *td) > -{ > - int i; > - for (i = 0; i < td->maxcontacts; ++i) { > - if (td->slots[i].contactid == td->curdata.contactid && > - td->slots[i].touch_state) > - return i; > - } > - for (i = 0; i < td->maxcontacts; ++i) { > - if (!td->slots[i].seen_in_this_frame && > - !td->slots[i].touch_state) > - return i; > - } > - /* should not occurs. If this happens that means > - * that the device sent more touches that it says > - * in the report descriptor. It is ignored then. */ > - return -1; > -} > - > static struct mt_class mt_classes[] = { > { .name = MT_CLS_DEFAULT, > .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP }, > @@ -319,24 +299,16 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, > * We need to ignore fields that belong to other collections > * such as Mouse that might have the same GenericDesktop usages. */ > if (field->application == HID_DG_TOUCHSCREEN) > - set_bit(INPUT_PROP_DIRECT, hi->input->propbit); > + td->mt_flags |= INPUT_MT_DIRECT; > else if (field->application != HID_DG_TOUCHPAD) > return 0; > > - /* In case of an indirect device (touchpad), we need to add > - * specific BTN_TOOL_* to be handled by the synaptics xorg > - * driver. > - * We also consider that touchscreens providing buttons are touchpads. > + /* > + * Model touchscreens providing buttons as touchpads. > */ > if (field->application == HID_DG_TOUCHPAD || > - (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON || > - cls->is_indirect) { > - set_bit(INPUT_PROP_POINTER, hi->input->propbit); > - set_bit(BTN_TOOL_FINGER, hi->input->keybit); > - set_bit(BTN_TOOL_DOUBLETAP, hi->input->keybit); > - set_bit(BTN_TOOL_TRIPLETAP, hi->input->keybit); > - set_bit(BTN_TOOL_QUADTAP, hi->input->keybit); > - } > + (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) > + td->mt_flags |= INPUT_MT_POINTER; > > /* eGalax devices provide a Digitizer.Stylus input which overrides > * the correct Digitizers.Finger X/Y ranges. > @@ -353,8 +325,6 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, > EV_ABS, ABS_MT_POSITION_X); > set_abs(hi->input, ABS_MT_POSITION_X, field, > cls->sn_move); > - /* touchscreen emulation */ > - set_abs(hi->input, ABS_X, field, cls->sn_move); > mt_store_field(usage, td, hi); > td->last_field_index = field->index; > return 1; > @@ -363,8 +333,6 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, > EV_ABS, ABS_MT_POSITION_Y); > set_abs(hi->input, ABS_MT_POSITION_Y, field, > cls->sn_move); > - /* touchscreen emulation */ > - set_abs(hi->input, ABS_Y, field, cls->sn_move); > mt_store_field(usage, td, hi); > td->last_field_index = field->index; > return 1; > @@ -390,7 +358,6 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, > case HID_DG_CONTACTID: > if (!td->maxcontacts) > td->maxcontacts = MT_DEFAULT_MAXCONTACT; > - input_mt_init_slots(hi->input, td->maxcontacts, 0); > mt_store_field(usage, td, hi); > td->last_field_index = field->index; > td->touches_by_report++; > @@ -418,9 +385,6 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, > EV_ABS, ABS_MT_PRESSURE); > set_abs(hi->input, ABS_MT_PRESSURE, field, > cls->sn_pressure); > - /* touchscreen emulation */ > - set_abs(hi->input, ABS_PRESSURE, field, > - cls->sn_pressure); > mt_store_field(usage, td, hi); > td->last_field_index = field->index; > return 1; > @@ -464,7 +428,24 @@ static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi, > return -1; > } > > -static int mt_compute_slot(struct mt_device *td) > +static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi) > + > +{ > + struct mt_device *td = hid_get_drvdata(hdev); > + struct mt_class *cls = &td->mtclass; > + > + if (cls->is_indirect) > + td->mt_flags |= INPUT_MT_POINTER; > + > + if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) > + td->mt_flags |= INPUT_MT_DROP_UNUSED; > + > + input_mt_init_slots(hi->input, td->maxcontacts, td->mt_flags); > + > + td->mt_flags = 0; > +} > + > +static int mt_compute_slot(struct mt_device *td, struct input_dev *input) > { > __s32 quirks = td->mtclass.quirks; > > @@ -480,42 +461,23 @@ static int mt_compute_slot(struct mt_device *td) > if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE) > return td->curdata.contactid - 1; > > - return find_slot_from_contactid(td); > + return input_mt_assign_slot_by_id(input, td->curdata.contactid); > } > > /* > * this function is called when a whole contact has been processed, > * so that it can assign it to a slot and store the data there > */ > -static void mt_complete_slot(struct mt_device *td) > +static void mt_complete_slot(struct mt_device *td, struct input_dev *input) > { > - td->curdata.seen_in_this_frame = true; > if (td->curvalid) { > - int slotnum = mt_compute_slot(td); > - > - if (slotnum >= 0 && slotnum < td->maxcontacts) > - td->slots[slotnum] = td->curdata; > - } > - td->num_received++; > -} > + int slotnum = mt_compute_slot(td, input); > + struct mt_slot *s = &td->curdata; > > + if (slotnum < 0 || slotnum >= td->maxcontacts) > + return; > > -/* > - * this function is called when a whole packet has been received and processed, > - * so that it can decide what to send to the input layer. > - */ > -static void mt_emit_event(struct mt_device *td, struct input_dev *input) > -{ > - int i; > - > - for (i = 0; i < td->maxcontacts; ++i) { > - struct mt_slot *s = &(td->slots[i]); > - if ((td->mtclass.quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) && > - !s->seen_in_this_frame) { > - s->touch_state = false; > - } > - > - input_mt_slot(input, i); > + input_mt_slot(input, slotnum); > input_mt_report_slot_state(input, MT_TOOL_FINGER, > s->touch_state); > if (s->touch_state) { > @@ -532,16 +494,22 @@ static void mt_emit_event(struct mt_device *td, struct input_dev *input) > input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major); > input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor); > } > - s->seen_in_this_frame = false; > - > } > > - input_mt_report_pointer_emulation(input, true); > - input_sync(input); > - td->num_received = 0; > + td->num_received++; > } > > > +/* > + * this function is called when a whole packet has been received and processed, > + * so that it can decide what to send to the input layer. > + */ > +static void mt_sync_frame(struct mt_device *td, struct input_dev *input) > +{ > + input_mt_sync_frame(input); > + input_sync(input); > + td->num_received = 0; > +} > > static int mt_event(struct hid_device *hid, struct hid_field *field, > struct hid_usage *usage, __s32 value) > @@ -549,7 +517,7 @@ static int mt_event(struct hid_device *hid, struct hid_field *field, > struct mt_device *td = hid_get_drvdata(hid); > __s32 quirks = td->mtclass.quirks; > > - if (hid->claimed & HID_CLAIMED_INPUT && td->slots) { > + if (hid->claimed & HID_CLAIMED_INPUT) { > switch (usage->hid) { > case HID_DG_INRANGE: > if (quirks & MT_QUIRK_ALWAYS_VALID) > @@ -602,11 +570,11 @@ static int mt_event(struct hid_device *hid, struct hid_field *field, > } > > if (usage->hid == td->last_slot_field) > - mt_complete_slot(td); > + mt_complete_slot(td, field->hidinput->input); > > if (field->index == td->last_field_index > && td->num_received >= td->num_expected) > - mt_emit_event(td, field->hidinput->input); > + mt_sync_frame(td, field->hidinput->input); > > } > > @@ -735,15 +703,6 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) > if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID) > mt_post_parse_default_settings(td); > > - td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot), > - GFP_KERNEL); > - if (!td->slots) { > - dev_err(&hdev->dev, "cannot allocate multitouch slots\n"); > - hid_hw_stop(hdev); > - ret = -ENOMEM; > - goto fail; > - } > - > ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group); > > mt_set_maxcontacts(hdev); > @@ -774,7 +733,6 @@ static void mt_remove(struct hid_device *hdev) > struct mt_device *td = hid_get_drvdata(hdev); > sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group); > hid_hw_stop(hdev); > - kfree(td->slots); > kfree(td); > hid_set_drvdata(hdev, NULL); > } > @@ -1087,6 +1045,7 @@ static struct hid_driver mt_driver = { > .remove = mt_remove, > .input_mapping = mt_input_mapping, > .input_mapped = mt_input_mapped, > + .input_configured = mt_input_configured, > .feature_mapping = mt_feature_mapping, > .usage_table = mt_grabbed_usages, > .event = mt_event, > -- > 1.7.11.5 > -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/