CMSG is an ACPI method used to find features available on
an Eee PC. But some features are never repported, even if present.
If the getter of a feature is present, this patch will set
the corresponding bit in cmsg.
Signed-off-by: Corentin Chary <corentincj@xxxxxxxxxx>
---
drivers/platform/x86/eeepc-laptop.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 19cc9ae..f5d8473 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -553,6 +553,28 @@ static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
return -EINVAL;
}
+static void cmsg_quirk(int cm, const char *name)
+{
+ int dummy;
+
+ /* Some BIOSes do not report cm although it is avaliable.
+ Check if cm_getv[cm] works and, if yes, assume cm should be set. */
+ if (!(ehotk->cm_supported & (1 << cm))
+ && !read_acpi_int(ehotk->handle, cm_getv[cm], &dummy)) {
+ pr_info("%s (%x) not reported by BIOS,"
+ " enabling anyway\n", name, 1 << cm);
+ ehotk->cm_supported |= 1 << cm;
+ }
+}
+
+static void cmsg_quirks(void)
+{
+ cmsg_quirk(CM_ASL_LID, "LID");
+ cmsg_quirk(CM_ASL_TYPE, "TYPE");
+ cmsg_quirk(CM_ASL_PANELPOWER, "PANELPOWER");
+ cmsg_quirk(CM_ASL_TPD, "TPD");
+}
+
static int eeepc_hotk_check(void)
{
const struct key_entry *key;
@@ -576,6 +598,7 @@ static int eeepc_hotk_check(void)
pr_err("Get control methods supported failed\n");
return -ENODEV;
} else {
+ cmsg_quirks();
pr_info("Get control methods supported: 0x%x\n",
ehotk->cm_supported);
}
--
1.6.3.3
--
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