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authorMattia Dongili <malattia@linux.it>2012-12-21 07:21:10 +0900
committerMatthew Garrett <matthew.garrett@nebula.com>2013-02-27 08:30:36 -0500
commit3a7abcd809e75b3588dd4a6529238e2a9b009c9a (patch)
tree44b9cdafdb810ea5dfad3b458d99c44a0f856633 /drivers/platform/x86
parent3ec1c3983d73b1e3d4cfd72afab94c34eceafe8a (diff)
downloadlinux-linaro-stable-3a7abcd809e75b3588dd4a6529238e2a9b009c9a.tar.gz
sony-laptop: allow reading the status of gfx switch
Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Diffstat (limited to 'drivers/platform/x86')
-rw-r--r--drivers/platform/x86/sony-laptop.c121
1 files changed, 112 insertions, 9 deletions
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 0bee6c2f8864..46c71f49a6b4 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -158,6 +158,11 @@ static void sony_nc_thermal_cleanup(struct platform_device *pd);
static int sony_nc_lid_resume_setup(struct platform_device *pd);
static void sony_nc_lid_resume_cleanup(struct platform_device *pd);
+static int sony_nc_gfx_switch_setup(struct platform_device *pd,
+ unsigned int handle);
+static void sony_nc_gfx_switch_cleanup(struct platform_device *pd);
+static int __sony_nc_gfx_switch_status_get(void);
+
static int sony_nc_highspeed_charging_setup(struct platform_device *pd);
static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd);
@@ -1241,17 +1246,13 @@ static void sony_nc_notify(struct acpi_device *device, u32 event)
/* Hybrid GFX switching */
sony_call_snc_handle(handle, 0x0000, &result);
dprintk("GFX switch event received (reason: %s)\n",
- (result & 0x01) ?
- "switch change" : "unknown");
-
- /* verify the switch state
- * 1: discrete GFX
- * 0: integrated GFX
- */
- sony_call_snc_handle(handle, 0x0100, &result);
+ (result == 0x1) ? "switch change" :
+ (result == 0x2) ? "output switch" :
+ (result == 0x3) ? "output switch" :
+ "");
ev_type = GFX_SWITCH;
- real_ev = result & 0xff;
+ real_ev = __sony_nc_gfx_switch_status_get();
break;
default:
@@ -1350,6 +1351,13 @@ static void sony_nc_function_setup(struct acpi_device *device,
pr_err("couldn't set up thermal profile function (%d)\n",
result);
break;
+ case 0x0128:
+ case 0x0146:
+ result = sony_nc_gfx_switch_setup(pf_device, handle);
+ if (result)
+ pr_err("couldn't set up GFX Switch status (%d)\n",
+ result);
+ break;
case 0x0131:
result = sony_nc_highspeed_charging_setup(pf_device);
if (result)
@@ -1414,6 +1422,10 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
case 0x0122:
sony_nc_thermal_cleanup(pd);
break;
+ case 0x0128:
+ case 0x0146:
+ sony_nc_gfx_switch_cleanup(pd);
+ break;
case 0x0131:
sony_nc_highspeed_charging_cleanup(pd);
break;
@@ -2355,6 +2367,97 @@ static void sony_nc_lid_resume_cleanup(struct platform_device *pd)
}
}
+/* GFX Switch position */
+enum gfx_switch {
+ SPEED,
+ STAMINA,
+ AUTO
+};
+struct snc_gfx_switch_control {
+ struct device_attribute attr;
+ unsigned int handle;
+};
+static struct snc_gfx_switch_control *gfxs_ctl;
+
+/* returns 0 for speed, 1 for stamina */
+static int __sony_nc_gfx_switch_status_get(void)
+{
+ unsigned int result;
+
+ if (sony_call_snc_handle(gfxs_ctl->handle, 0x0100, &result))
+ return -EIO;
+
+ switch (gfxs_ctl->handle) {
+ case 0x0146:
+ /* 1: discrete GFX (speed)
+ * 0: integrated GFX (stamina)
+ */
+ return result & 0x1 ? SPEED : STAMINA;
+ break;
+ case 0x0128:
+ /* it's a more elaborated bitmask, for now:
+ * 2: integrated GFX (stamina)
+ * 0: discrete GFX (speed)
+ */
+ dprintk("GFX Status: 0x%x\n", result);
+ return result & 0x80 ? AUTO :
+ result & 0x02 ? STAMINA : SPEED;
+ break;
+ }
+ return -EINVAL;
+}
+
+static ssize_t sony_nc_gfx_switch_status_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer)
+{
+ int pos = __sony_nc_gfx_switch_status_get();
+
+ if (pos < 0)
+ return pos;
+
+ return snprintf(buffer, PAGE_SIZE, "%s\n", pos ? "speed" : "stamina");
+}
+
+static int sony_nc_gfx_switch_setup(struct platform_device *pd,
+ unsigned int handle)
+{
+ unsigned int result;
+
+ gfxs_ctl = kzalloc(sizeof(struct snc_gfx_switch_control), GFP_KERNEL);
+ if (!gfxs_ctl)
+ return -ENOMEM;
+
+ gfxs_ctl->handle = handle;
+
+ sysfs_attr_init(&gfxs_ctl->attr.attr);
+ gfxs_ctl->attr.attr.name = "gfx_switch_status";
+ gfxs_ctl->attr.attr.mode = S_IRUGO;
+ gfxs_ctl->attr.show = sony_nc_gfx_switch_status_show;
+
+ result = device_create_file(&pd->dev, &gfxs_ctl->attr);
+ if (result)
+ goto gfxerror;
+
+ return 0;
+
+gfxerror:
+ kfree(gfxs_ctl);
+ gfxs_ctl = NULL;
+
+ return result;
+}
+
+static void sony_nc_gfx_switch_cleanup(struct platform_device *pd)
+{
+ if (gfxs_ctl) {
+ device_remove_file(&pd->dev, &gfxs_ctl->attr);
+
+ kfree(gfxs_ctl);
+ gfxs_ctl = NULL;
+ }
+}
+
/* High speed charging function */
static struct device_attribute *hsc_handle;