Input: atkbd - fix keyboard not working on some LG laptops

After issuing ATKBD_CMD_RESET_DIS, keyboard on some LG laptops stops
working. The workaround is to stop issuing ATKBD_CMD_RESET_DIS commands.

In order to keep changes in atkbd driver to the minimum we check DMI
signature and only skip ATKBD_CMD_RESET_DIS if we are running on LG
LW25-B7HV or P1-J273B.

Cc: stable@vger.kernel.org
Signed-off-by: Sheng-Liang Song <ssl@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c
index 2626773..2dd1d0d 100644 (file)
--- a/drivers/input/keyboard/atkbd.c
+++ b/drivers/input/keyboard/atkbd.c
@@ -243,6 +243,12 @@ static void (*atkbd_platform_fixup)(struct atkbd *, const void *data);
 static void *atkbd_platform_fixup_data;
 static unsigned int (*atkbd_platform_scancode_fixup)(struct atkbd *, unsigned int);
 
+/*
+ * Certain keyboards to not like ATKBD_CMD_RESET_DIS and stop responding
+ * to many commands until full reset (ATKBD_CMD_RESET_BAT) is performed.
+ */
+static bool atkbd_skip_deactivate;
+
 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
                                ssize_t (*handler)(struct atkbd *, char *));
 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
@@ -768,7 +774,8 @@ static int atkbd_probe(struct atkbd *atkbd)
  * Make sure nothing is coming from the keyboard and disturbs our
  * internal state.
  */
-       atkbd_deactivate(atkbd);
+       if (!atkbd_skip_deactivate)
+               atkbd_deactivate(atkbd);
 
        return 0;
 }
@@ -1638,6 +1645,12 @@ static int __init atkbd_setup_scancode_fixup(const struct dmi_system_id *id)
        return 1;
 }
 
+static int __init atkbd_deactivate_fixup(const struct dmi_system_id *id)
+{
+       atkbd_skip_deactivate = true;
+       return 1;
+}
+
 static const struct dmi_system_id atkbd_dmi_quirk_table[] __initconst = {
        {
                .matches = {
@@ -1775,6 +1788,20 @@ static const struct dmi_system_id atkbd_dmi_quirk_table[] __initconst = {
                .callback = atkbd_setup_scancode_fixup,
                .driver_data = atkbd_oqo_01plus_scancode_fixup,
        },
+       {
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "LW25-B7HV"),
+               },
+               .callback = atkbd_deactivate_fixup,
+       },
+       {
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "P1-J273B"),
+               },
+               .callback = atkbd_deactivate_fixup,
+       },
        { }
 };