Re: Regression since commit 92bac83
From: Hans de Goede
Date: Wed Oct 21 2015 - 04:31:01 EST
Hi,
On 21-10-15 10:19, Pali RohÃr wrote:
On Tuesday 20 October 2015 13:39:05 Hans de Goede wrote:
From 5d21a8004260c3e6287bde81c2a9e8f80144e77c Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Tue, 20 Oct 2015 11:12:07 +0200
Subject: [PATCH] alps: Only the Dell Latitude D420/430/620/630 have separate
stick button bits
commit 92bac83dd79e ("Input: alps - non interleaved V2 dualpoint has
separate stick button bits") assumes that all alps v2 non-interleaved
dual point setups have the separate stick button bits.
Later we limited this to Dell laptops only because of reports that this
broke things on non Dell laptops. Now it turns out that this breaks things
on the Dell Latitude D600 too. So it seems that only the Dell Latitude
D420/430/620/630, which all share the same touchpad / stick combo,
have these separate bits.
This patch limits the checking of the separate bits to only these models
fixing regressions with other models.
Reported-and-tested-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Tested-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/input/mouse/alps.c | 48 ++++++++++++++++++++++++++++++++++++++++------
1 file changed, 42 insertions(+), 6 deletions(-)
diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 4d24686..41e6cb5 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -100,7 +100,7 @@ static const struct alps_nibble_commands alps_v6_nibble_commands[] = {
#define ALPS_FOUR_BUTTONS 0x40 /* 4 direction button present */
#define ALPS_PS2_INTERLEAVED 0x80 /* 3-byte PS/2 packet interleaved with
6-byte ALPS packet */
-#define ALPS_DELL 0x100 /* device is a Dell laptop */
+#define ALPS_STICK_BITS 0x100 /* separate stick button bits */
#define ALPS_BUTTONPAD 0x200 /* device is a clickpad */
static const struct alps_model_info alps_model_data[] = {
@@ -159,6 +159,43 @@ static const struct alps_protocol_info alps_v8_protocol_data = {
ALPS_PROTO_V8, 0x18, 0x18, 0
};
+/*
+ * Some v2 models report the stick buttons in separate bits
+ */
+static const struct dmi_system_id alps_dmi_has_separate_stick_buttons[] = {
+#if defined(CONFIG_DMI) && defined(CONFIG_X86)
+ {
+ /* Extrapolated from other entries */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D420"),
+ },
+ },
+ {
+ /* Reported-by: Hans de Bruin <jmdebruin@xxxxxxxxx> */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D430"),
+ },
+ },
+ {
+ /* Reported-by: Hans de Goede <hdegoede@xxxxxxxxxx> */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D620"),
+ },
+ },
+ {
+ /* Extrapolated from other entries */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D630"),
+ },
+ },
+#endif
+ { }
+};
+
Hi! Are you sure that above machines do not have variants without
ALPS_DUALPOINT or without ALPS_PASS? Because if yes, then we could see
another break.
Yes I'm sure that these machines always come with a dualpoint setup
with pass-through support. The 20/30 models are in essence the same
with just a newer version core2duo dropped in (they changed the model
now since the newer core2duo-s where the first x86_64 cpu-s from Intel,
and the 4x0 / 6x0 models have the exact same dualpoint setup, which is
why both Hans de Bruin and me were seeing the same bug.
Regards,
Hans
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