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Commit 3a7abcd8 authored by Mattia Dongili's avatar Mattia Dongili Committed by Matthew Garrett
Browse files

sony-laptop: allow reading the status of gfx switch 



Signed-off-by: default avatarMattia Dongili <malattia@linux.it>
Signed-off-by: default avatarMatthew Garrett <matthew.garrett@nebula.com>
parent 3ec1c398

drivers/platform/x86/sony-laptop.c

+112 −9
Original line number Diff line number Diff line
@@ -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;