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Fri, 06 Nov 2026 18:09:15 -0800 (PST) Received: from localhost ([2409:40c4:100c:32b8:cdcf:1840:88f5:4e8]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36fa922c6c7sm13130210eec.10.2026.11.06.18.09.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Nov 2026 18:09:14 -0800 (PST) From: Lovekesh Solanki To: dmitry.torokhov@gmail.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Lovekesh Solanki Subject: [PATCH v2] Input: synaptics - make InterTouch quirks table driven Date: Sat, 7 Nov 2026 07:37:51 +0530 Message-ID: <20261107020751.3959748-1-lovekeshsolanki00@gmail.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261105042614.688312-1-lovekeshsolanki00@gmail.com> References: <20261105042614.688312-1-lovekeshsolanki00@gmail.com> X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Move the device specific InterTouch quirk into a dedicated table to simplify exempting more devices in the future. Signed-off-by: Lovekesh Solanki --- Changes in v2: - Guard synaptics_intertouch_quirk & synaptics_intertouch_blocklist by #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS to match its only caller synaptics_intertouch_disabled(). --- drivers/input/mouse/synaptics.c | 52 ++++++++++++++++++++++++++++++--- 1 file changed, 48 insertions(+), 4 deletions(-) diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 1ed9261bff2b..8561256406af 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -213,6 +213,25 @@ static const char * const forcepad_pnp_ids[] = { NULL }; +#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS +struct synaptics_intertouch_quirk { + u32 board_id; + const char *pnp_id; +}; + +/* + * List of devices with broken board revisions. + */ +static const struct synaptics_intertouch_quirk +synaptics_intertouch_blocklist[] = { + { + /* ThinkPad T440p */ + .board_id = 2722, + .pnp_id = "LEN0036", + }, +}; +#endif + /* * Send a command to the synaptics touchpad by special commands */ @@ -1814,6 +1833,33 @@ static int synaptics_create_intertouch(struct psmouse *psmouse, leave_breadcrumbs); } +/* + * synaptics_intertouch_disabled - check if InterTouch should be disabled + * for a given touchpad based on its board revision. + * + * Returns true if the touchpad's board ID and PNP ID match a known broken + * entry in the synaptics_intertouch_blocklist table. + */ +static bool synaptics_intertouch_disabled(struct psmouse *psmouse, + const struct synaptics_device_info *info) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(synaptics_intertouch_blocklist); i++) { + const struct synaptics_intertouch_quirk *quirk = + &synaptics_intertouch_blocklist[i]; + + if (info->board_id == quirk->board_id && + psmouse_matches_pnp_id(psmouse, + (const char * const []) { + quirk->pnp_id, NULL + })) + return true; + } + + return false; +} + /* * synaptics_setup_intertouch - called once the PS/2 devices are enumerated * and decides to instantiate a SMBus InterTouch device. @@ -1840,10 +1886,8 @@ static int synaptics_setup_intertouch(struct psmouse *psmouse, return -ENXIO; } - /* Disable intertouch on known-broken T440p board revisions */ - if (info->board_id == 2722 && - psmouse_matches_pnp_id(psmouse, - (const char * const []){"LEN0036", NULL})) { + /* Disable intertouch on known-broken board revisions */ + if (synaptics_intertouch_disabled(psmouse, info)) { psmouse_info(psmouse, "Disabling intertouch for board id %u\n", info->board_id); -- 2.56.0