[PATCH 4/7] sony-laptop: add lid backlight support for handle 0x143

[Mattia Dongili]

Signed-off-by: Mattia Dongili <malat...@linux.it>
---
 drivers/platform/x86/sony-laptop.c |   27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/sony-laptop.c 
b/drivers/platform/x86/sony-laptop.c
index 5d8f3fa..ec7f4e0 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -1010,6 +1010,7 @@ static ssize_t sony_nc_sysfs_store(struct device *dev,
 struct sony_backlight_props {
        struct backlight_device *dev;
        int                     handle;
+       int                     cmd_base;
        u8                      offset;
        u8                      maxlvl;
 };
@@ -1037,7 +1038,7 @@ static int sony_nc_get_brightness_ng(struct 
backlight_device *bd)
        struct sony_backlight_props *sdev =
                (struct sony_backlight_props *)bl_get_data(bd);
 
-       sony_call_snc_handle(sdev->handle, 0x0200, &result);
+       sony_call_snc_handle(sdev->handle, sdev->cmd_base + 0x100, &result);
 
        return (result & 0xff) - sdev->offset;
 }
@@ -1049,7 +1050,8 @@ static int sony_nc_update_status_ng(struct 
backlight_device *bd)
                (struct sony_backlight_props *)bl_get_data(bd);
 
        value = bd->props.brightness + sdev->offset;
-       if (sony_call_snc_handle(sdev->handle, 0x0100 | (value << 16), &result))
+       if (sony_call_snc_handle(sdev->handle, sdev->cmd_base | (value << 0x10),
+                               &result))
                return -EIO;
 
        return value;
@@ -2496,6 +2498,7 @@ static void sony_nc_backlight_ng_read_limits(int handle,
 {
        u64 offset;
        int i;
+       int lvl_table_len = 0;
        u8 min = 0xff, max = 0x00;
        unsigned char buffer[32] = { 0 };
 
@@ -2515,11 +2518,21 @@ static void sony_nc_backlight_ng_read_limits(int handle,
        if (i < 0)
                return;
 
+       switch (handle) {
+       case 0x012f:
+       case 0x0137:
+               lvl_table_len = 9;
+               break;
+       case 0x143:
+               lvl_table_len = 16;
+               break;
+       }
+
        /* the buffer lists brightness levels available, brightness levels are
         * from position 0 to 8 in the array, other values are used by ALS
         * control.
         */
-       for (i = 0; i < 9 && i < ARRAY_SIZE(buffer); i++) {
+       for (i = 0; i < lvl_table_len && i < ARRAY_SIZE(buffer); i++) {
 
                dprintk("Brightness level: %d\n", buffer[i]);
 
@@ -2546,14 +2559,22 @@ static void sony_nc_backlight_setup(void)
 
        if (sony_find_snc_handle(0x12f) != -1) {
                ops = &sony_backlight_ng_ops;
+               sony_bl_props.cmd_base = 0x0100;
                sony_nc_backlight_ng_read_limits(0x12f, &sony_bl_props);
                max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;
 
        } else if (sony_find_snc_handle(0x137) != -1) {
                ops = &sony_backlight_ng_ops;
+               sony_bl_props.cmd_base = 0x0100;
                sony_nc_backlight_ng_read_limits(0x137, &sony_bl_props);
                max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;
 
+       } else if (sony_find_snc_handle(0x143) != -1) {
+               ops = &sony_backlight_ng_ops;
+               sony_bl_props.cmd_base = 0x3000;
+               sony_nc_backlight_ng_read_limits(0x143, &sony_bl_props);
+               max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;
+
        } else if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "GBRT",
                                                &unused))) {
                ops = &sony_backlight_ops;
-- 
1.7.10

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