[3.16.y-ckt stable] Patch "Input: elantech - fix crc_enabled for Fujitsu H730" has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Wed May 6 09:53:25 UTC 2015
This is a note to let you know that I have just added a patch titled
Input: elantech - fix crc_enabled for Fujitsu H730
to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue
This patch is scheduled to be released in version 3.16.7-ckt11.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From c774df9cab0dc8c72704264efb2b2130f442d4d9 Mon Sep 17 00:00:00 2001
From: Ulrik De Bie <ulrik.debie-os at e2big.org>
Date: Fri, 7 Nov 2014 23:57:34 -0800
Subject: Input: elantech - fix crc_enabled for Fujitsu H730
commit 0dc1587905a50f8f61bbc29e850aa592821e4bea upstream.
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: Stefan Valouch <stefan at valouch.com>
Tested-by: Stefan Valouch <stefan at valouch.com>
Tested-by: Alfredo Gemma <alfredo.gemma at gmail.com>
Signed-off-by: Ulrik De Bie <ulrik.debie-os at e2big.org>
Acked-by: Hans de Goede <hdegoede at redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov at gmail.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
drivers/input/mouse/elantech.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 29365c60e514..687c149aa12d 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1374,6 +1374,22 @@ static int elantech_reconnect(struct psmouse *psmouse)
}
/*
+ * 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.
*/
@@ -1450,7 +1466,8 @@ 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);
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