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Commit 0dc15879 authored by Ulrik De Bie's avatar Ulrik De Bie Committed by Dmitry Torokhov
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Input: elantech - fix crc_enabled for Fujitsu H730 



The Fujitsu H730 does not work with crc_enabled = 0, even though the
crc_enabled bit in the firmware version indicated it would. When switching
this value to crc_enabled to 1, the touchpad works. This patch uses DMI to
detect H730.

Reported-by: default avatarStefan Valouch <stefan@valouch.com>
Tested-by: default avatarStefan Valouch <stefan@valouch.com>
Tested-by: default avatarAlfredo Gemma <alfredo.gemma@gmail.com>
Signed-off-by: default avatarUlrik De Bie <ulrik.debie-os@e2big.org>
Acked-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent caeb0d37

drivers/input/mouse/elantech.c

+18 −1
Original line number Diff line number Diff line
@@ -1450,6 +1450,22 @@ static int elantech_reconnect(struct psmouse *psmouse) 
	return 0;

}



/*

 * Some hw_version 4 models do not work with crc_disabled

 */

static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = {

#if defined(CONFIG_DMI) && defined(CONFIG_X86)

	{

		/* Fujitsu H730 does not work with crc_enabled == 0 */

		.matches = {

			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),

			DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"),

		},

	},

#endif

	{ }

};



/*

 * Some hw_version 3 models go into error state when we try to set

 * bit 3 and/or bit 1 of r10.
@@ -1525,7 +1541,8 @@ static int elantech_set_properties(struct elantech_data *etd) 
	 * The signatures of v3 and v4 packets change depending on the

	 * value of this hardware flag.

	 */

	etd->crc_enabled = ((etd->fw_version & 0x4000) == 0x4000);

	etd->crc_enabled = (etd->fw_version & 0x4000) == 0x4000 ||

			   dmi_check_system(elantech_dmi_force_crc_enabled);



	/* Enable real hardware resolution on hw_version 3 ? */

	etd->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table);