[PATCH 7/16] Limit Synaptics rate on Toshiba Satellites

[Dmitry Torokhov <dtor_core@ameritech.net>]

===================================================================


ChangeSet@1.1957.1.34, 2004-11-12 01:31:15-05:00, dtor_core@ameritech.net
  Input: synaptics - use DMI to detect Toshiba Satellite notebooks
         and automatically reduce touchpad reporting rate to 40 pps
         as they have trouble handling high rate (80 pps).
  
  Signed-off-by: Dmitry Torokhov <dtor@mail.ru>


 synaptics.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+)


===================================================================



diff -Nru a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
--- a/drivers/input/mouse/synaptics.c	2004-12-29 01:48:12 -05:00
+++ b/drivers/input/mouse/synaptics.c	2004-12-29 01:48:12 -05:00
@@ -604,6 +604,20 @@
 	return 0;
 }
 
+#if defined(__i386__)
+#include <linux/dmi.h>
+static struct dmi_system_id toshiba_dmi_table[] = {
+	{
+		.ident = "Toshiba Satellite",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME , "Satellite"),
+		},
+	},
+	{ }
+};
+#endif
+
 int synaptics_init(struct psmouse *psmouse)
 {
 	struct synaptics_data *priv;
@@ -636,6 +650,18 @@
 	psmouse->disconnect = synaptics_disconnect;
 	psmouse->reconnect = synaptics_reconnect;
 	psmouse->pktsize = 6;
+
+#if defined(__i386__)
+	/*
+	 * Toshiba's KBC seems to have trouble handling data from
+	 * Synaptics as full rate, switch to lower rate which is roughly
+	 * thye same as rate of standard PS/2 mouse.
+	 */
+	if (psmouse->rate >= 80 && dmi_check_system(toshiba_dmi_table)) {
+		printk(KERN_INFO "synaptics: Toshiba Satellite detected, limiting rate to 40pps.\n");
+		psmouse->rate = 40;
+	}
+#endif
 
 	return 0;