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[34.125.173.97]) by smtp.gmail.com with ESMTPSA id e8-20020a17090301c800b00189b2b8dbedsm14944923plh.228.2022.12.08.08.59.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Dec 2022 08:59:07 -0800 (PST) From: Allen Ballway To: dtor@chromium.org Cc: ballway@chromium.org, benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, rydberg@bitmath.org Subject: [PATCH v2] HID: multitouch: Add quirks for flipped axes Date: Thu, 8 Dec 2022 16:58:36 +0000 Message-Id: <20221208165145.1.I69657e84c0606b2e5ccfa9fedbf42b7676a1e129@changeid> X-Mailer: git-send-email 2.39.0.rc1.256.g54fd8350bd-goog In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Certain touchscreen devices, such as the ELAN9034, are oriented incorrectly and report touches on opposite points on the X and Y axes. For example, a 100x200 screen touched at (10,20) would report (90, 180) and vice versa. This is fixed by adding device quirks to transform the touch points into the correct spaces, from X -> MAX(X) - X, and Y -> MAX(Y) - Y. Signed-off-by: Allen Ballway --- V1 -> V2: Address review comments, change to use DMI match. Confirmed MT_TOOL_X/Y require transformation and update orientation based on flipped axes. drivers/hid/hid-multitouch.c | 72 +++++++++++++++++++++++++++++++++--- 1 file changed, 67 insertions(+), 5 deletions(-) -- 2.39.0.rc1.256.g54fd8350bd-goog diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 91a4d3fc30e08..8a4f77e534a75 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -39,6 +39,7 @@ #include #include #include +#include MODULE_AUTHOR("Stephane Chatty "); @@ -71,6 +72,8 @@ MODULE_LICENSE("GPL"); #define MT_QUIRK_SEPARATE_APP_REPORT BIT(19) #define MT_QUIRK_FORCE_MULTI_INPUT BIT(20) #define MT_QUIRK_DISABLE_WAKEUP BIT(21) +#define MT_QUIRK_FLIP_X BIT(22) +#define MT_QUIRK_FLIP_Y BIT(23) #define MT_INPUTMODE_TOUCHSCREEN 0x02 #define MT_INPUTMODE_TOUCHPAD 0x03 @@ -212,6 +215,7 @@ static void mt_post_parse(struct mt_device *td, struct mt_application *app); #define MT_CLS_GOOGLE 0x0111 #define MT_CLS_RAZER_BLADE_STEALTH 0x0112 #define MT_CLS_SMART_TECH 0x0113 +#define MT_CLS_ELAN_FLIPPED 0x0114 #define MT_DEFAULT_MAXCONTACT 10 #define MT_MAX_MAXCONTACT 250 @@ -396,9 +400,36 @@ static const struct mt_class mt_classes[] = { MT_QUIRK_CONTACT_CNT_ACCURATE | MT_QUIRK_SEPARATE_APP_REPORT, }, + { .name = MT_CLS_ELAN_FLIPPED, + .quirks = MT_QUIRK_ALWAYS_VALID | + MT_QUIRK_IGNORE_DUPLICATES | + MT_QUIRK_HOVERING | + MT_QUIRK_CONTACT_CNT_ACCURATE | + MT_QUIRK_STICKY_FINGERS | + MT_QUIRK_WIN8_PTP_BUTTONS | + MT_QUIRK_FLIP_X | + MT_QUIRK_FLIP_Y, + .export_all_inputs = true }, + { } }; +/* + * This list contains devices which have specific issues based on the system + * they're on and not just the device itself. + */ +static const struct dmi_system_id mt_devices_dmi_override_table[] = { + { + .ident = "DynaBook K50/FR", + .matches = { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dynabook Inc."), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "dynabook K50/FR"), + }, + .driver_data = (void *)MT_CLS_ELAN_FLIPPED, + }, + { } /* Terminate list */ +}; + static ssize_t mt_show_quirks(struct device *dev, struct device_attribute *attr, char *buf) @@ -1086,6 +1117,10 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input, int orientation = wide; int max_azimuth; int azimuth; + int x; + int y; + int cx; + int cy; if (slot->a != DEFAULT_ZERO) { /* @@ -1104,6 +1139,16 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input, if (azimuth > max_azimuth * 2) azimuth -= max_azimuth * 4; orientation = -azimuth; + + /* Orientation is inverted if the X or Y axes are + * flipped, but normalized if both are inverted. + */ + if (quirks & (MT_QUIRK_FLIP_X | MT_QUIRK_FLIP_Y) && + !((quirks & MT_QUIRK_FLIP_X) + && (quirks & MT_QUIRK_FLIP_Y))) { + orientation = -orientation; + } + } if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) { @@ -1115,10 +1160,23 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input, minor = minor >> 1; } - input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x); - input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y); - input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx); - input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy); + x = quirks & MT_QUIRK_FLIP_X ? + input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->x : + *slot->x; + y = quirks & MT_QUIRK_FLIP_Y ? + input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->y : + *slot->y; + cx = quirks & MT_QUIRK_FLIP_X ? + input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->cx : + *slot->cx; + cy = quirks & MT_QUIRK_FLIP_Y ? + input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->cy : + *slot->cy; + + input_event(input, EV_ABS, ABS_MT_POSITION_X, x); + input_event(input, EV_ABS, ABS_MT_POSITION_Y, y); + input_event(input, EV_ABS, ABS_MT_TOOL_X, cx); + input_event(input, EV_ABS, ABS_MT_TOOL_Y, cy); input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state); input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation); input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p); @@ -1711,9 +1769,13 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) int ret, i; struct mt_device *td; const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */ + const struct dmi_system_id *system_id + = dmi_first_match(mt_devices_dmi_override_table); + const long driver_data_name = system_id ? + (long)(system_id->driver_data) : id->driver_data; for (i = 0; mt_classes[i].name ; i++) { - if (id->driver_data == mt_classes[i].name) { + if (driver_data_name == mt_classes[i].name) { mtclass = &(mt_classes[i]); break; }