[PATCH 8/7] msi-wmi: depend on backlight and fix corner-cases problems

Anisse Astier
2009-12-14T11:37:57Z

Now depends on BACKLIGHT_CLASS_DEVICE.
Driver will return an error if it can't get actual backlight value
Fix remapping of brightness keys when backlight is not controlled by ACPI.

Signed-off-by: Anisse Astier <anisse@astier.eu>
---
drivers/platform/x86/Kconfig | 1 +
drivers/platform/x86/msi-wmi.c | 23 +++++++++++++++--------
2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 1f82d6d..a006dec 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -369,6 +369,7 @@ config MSI_WMI
tristate "MSI WMI extras"
depends on ACPI_WMI
depends on INPUT
+ depends on BACKLIGHT_CLASS_DEVICE
select INPUT_SPARSEKMAP
help
Say Y here if you want to support WMI-based hotkeys on MSI laptops.
diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c
index e25b80c..0c8fe14 100644
--- a/drivers/platform/x86/msi-wmi.c
+++ b/drivers/platform/x86/msi-wmi.c
@@ -53,11 +53,15 @@ MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-6638:*");
#define dprintk(msg...) pr_debug(DRV_PFX msg)

#define KEYCODE_BASE 0xD0
+#define MSI_WMI_BRIGHTNESSUP KEYCODE_BASE
+#define MSI_WMI_BRIGHTNESSDOWN (KEYCODE_BASE + 1)
+#define MSI_WMI_VOLUMEUP (KEYCODE_BASE + 2)
+#define MSI_WMI_VOLUMEDOWN (KEYCODE_BASE + 3)
static struct key_entry msi_wmi_keymap[] = {
- { KE_KEY, KEYCODE_BASE, {KEY_BRIGHTNESSUP} },
- { KE_KEY, KEYCODE_BASE + 1, {KEY_BRIGHTNESSDOWN} },
- { KE_KEY, KEYCODE_BASE + 2, {KEY_VOLUMEUP} },
- { KE_KEY, KEYCODE_BASE + 3, {KEY_VOLUMEDOWN} },
+ { KE_KEY, MSI_WMI_BRIGHTNESSUP, {KEY_BRIGHTNESSUP} },
+ { KE_KEY, MSI_WMI_BRIGHTNESSDOWN, {KEY_BRIGHTNESSDOWN} },
+ { KE_KEY, MSI_WMI_VOLUMEUP, {KEY_VOLUMEUP} },
+ { KE_KEY, MSI_WMI_VOLUMEDOWN, {KEY_VOLUMEDOWN} },
{ KE_END, 0}
};
static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1];
@@ -110,12 +114,14 @@ static int msi_wmi_set_block(int instance, int value)

static int bl_get(struct backlight_device *bd)
{
- int level, err, ret = 0;
+ int level, err, ret;

/* Instance 1 is "get backlight", cmp with DSDT */
err = msi_wmi_query_block(1, &ret);
- if (err)
+ if (err) {
printk(KERN_ERR DRV_PFX "Could not query backlight: %d\n", err);
+ return -EINVAL;
+ }
dprintk("Get: Query block returned: %d\n", ret);
for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
if (backlight_map[level] == ret) {
@@ -180,8 +186,9 @@ static void msi_wmi_notify(u32 value, void *context)

if (key->type == KE_KEY &&
/* Brightness is served via acpi video driver */
- (backlight || (key->keycode != KEY_BRIGHTNESSUP &&
- key->keycode != KEY_BRIGHTNESSDOWN))) {
+ (!acpi_video_backlight_support() ||
+ (key->code != MSI_WMI_BRIGHTNESSUP &&
+ key->code != MSI_WMI_BRIGHTNESSDOWN))) {
dprintk("Send key: 0x%X - "
"Input layer keycode: %d\n", key->code,
key->keycode);
--
1.6.5.3