diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/nouveau/nouveau_acpi.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/nouveau/nouveau_acpi.c')
-rw-r--r-- | kernel/drivers/gpu/drm/nouveau/nouveau_acpi.c | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/nouveau/nouveau_acpi.c b/kernel/drivers/gpu/drm/nouveau/nouveau_acpi.c new file mode 100644 index 000000000..622424692 --- /dev/null +++ b/kernel/drivers/gpu/drm/nouveau/nouveau_acpi.c @@ -0,0 +1,427 @@ +#include <linux/pci.h> +#include <linux/acpi.h> +#include <linux/slab.h> +#include <linux/mxm-wmi.h> +#include <linux/vga_switcheroo.h> +#include <drm/drm_edid.h> +#include <acpi/video.h> + +#include "nouveau_drm.h" +#include "nouveau_acpi.h" + +#define NOUVEAU_DSM_LED 0x02 +#define NOUVEAU_DSM_LED_STATE 0x00 +#define NOUVEAU_DSM_LED_OFF 0x10 +#define NOUVEAU_DSM_LED_STAMINA 0x11 +#define NOUVEAU_DSM_LED_SPEED 0x12 + +#define NOUVEAU_DSM_POWER 0x03 +#define NOUVEAU_DSM_POWER_STATE 0x00 +#define NOUVEAU_DSM_POWER_SPEED 0x01 +#define NOUVEAU_DSM_POWER_STAMINA 0x02 + +#define NOUVEAU_DSM_OPTIMUS_CAPS 0x1A +#define NOUVEAU_DSM_OPTIMUS_FLAGS 0x1B + +#define NOUVEAU_DSM_OPTIMUS_POWERDOWN_PS3 (3 << 24) +#define NOUVEAU_DSM_OPTIMUS_NO_POWERDOWN_PS3 (2 << 24) +#define NOUVEAU_DSM_OPTIMUS_FLAGS_CHANGED (1) + +#define NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN (NOUVEAU_DSM_OPTIMUS_POWERDOWN_PS3 | NOUVEAU_DSM_OPTIMUS_FLAGS_CHANGED) + +/* result of the optimus caps function */ +#define OPTIMUS_ENABLED (1 << 0) +#define OPTIMUS_STATUS_MASK (3 << 3) +#define OPTIMUS_STATUS_OFF (0 << 3) +#define OPTIMUS_STATUS_ON_ENABLED (1 << 3) +#define OPTIMUS_STATUS_PWR_STABLE (3 << 3) +#define OPTIMUS_DISPLAY_HOTPLUG (1 << 6) +#define OPTIMUS_CAPS_MASK (7 << 24) +#define OPTIMUS_DYNAMIC_PWR_CAP (1 << 24) + +#define OPTIMUS_AUDIO_CAPS_MASK (3 << 27) +#define OPTIMUS_HDA_CODEC_MASK (2 << 27) /* hda bios control */ + +static struct nouveau_dsm_priv { + bool dsm_detected; + bool optimus_detected; + acpi_handle dhandle; + acpi_handle rom_handle; +} nouveau_dsm_priv; + +bool nouveau_is_optimus(void) { + return nouveau_dsm_priv.optimus_detected; +} + +bool nouveau_is_v1_dsm(void) { + return nouveau_dsm_priv.dsm_detected; +} + +#define NOUVEAU_DSM_HAS_MUX 0x1 +#define NOUVEAU_DSM_HAS_OPT 0x2 + +#ifdef CONFIG_VGA_SWITCHEROO +static const char nouveau_dsm_muid[] = { + 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D, + 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4, +}; + +static const char nouveau_op_dsm_muid[] = { + 0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47, + 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0, +}; + +static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result) +{ + int i; + union acpi_object *obj; + char args_buff[4]; + union acpi_object argv4 = { + .buffer.type = ACPI_TYPE_BUFFER, + .buffer.length = 4, + .buffer.pointer = args_buff + }; + + /* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */ + for (i = 0; i < 4; i++) + args_buff[i] = (arg >> i * 8) & 0xFF; + + *result = 0; + obj = acpi_evaluate_dsm_typed(handle, nouveau_op_dsm_muid, 0x00000100, + func, &argv4, ACPI_TYPE_BUFFER); + if (!obj) { + acpi_handle_info(handle, "failed to evaluate _DSM\n"); + return AE_ERROR; + } else { + if (obj->buffer.length == 4) { + *result |= obj->buffer.pointer[0]; + *result |= (obj->buffer.pointer[1] << 8); + *result |= (obj->buffer.pointer[2] << 16); + *result |= (obj->buffer.pointer[3] << 24); + } + ACPI_FREE(obj); + } + + return 0; +} + +/* + * On some platforms, _DSM(nouveau_op_dsm_muid, func0) has special + * requirements on the fourth parameter, so a private implementation + * instead of using acpi_check_dsm(). + */ +static int nouveau_check_optimus_dsm(acpi_handle handle) +{ + int result; + + /* + * Function 0 returns a Buffer containing available functions. + * The args parameter is ignored for function 0, so just put 0 in it + */ + if (nouveau_optimus_dsm(handle, 0, 0, &result)) + return 0; + + /* + * ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported. + * If the n-th bit is enabled, function n is supported + */ + return result & 1 && result & (1 << NOUVEAU_DSM_OPTIMUS_CAPS); +} + +static int nouveau_dsm(acpi_handle handle, int func, int arg) +{ + int ret = 0; + union acpi_object *obj; + union acpi_object argv4 = { + .integer.type = ACPI_TYPE_INTEGER, + .integer.value = arg, + }; + + obj = acpi_evaluate_dsm_typed(handle, nouveau_dsm_muid, 0x00000102, + func, &argv4, ACPI_TYPE_INTEGER); + if (!obj) { + acpi_handle_info(handle, "failed to evaluate _DSM\n"); + return AE_ERROR; + } else { + if (obj->integer.value == 0x80000002) + ret = -ENODEV; + ACPI_FREE(obj); + } + + return ret; +} + +static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id) +{ + mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0); + mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0); + return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id); +} + +static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state) +{ + int arg; + if (state == VGA_SWITCHEROO_ON) + arg = NOUVEAU_DSM_POWER_SPEED; + else + arg = NOUVEAU_DSM_POWER_STAMINA; + nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg); + return 0; +} + +static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id) +{ + if (!nouveau_dsm_priv.dsm_detected) + return 0; + if (id == VGA_SWITCHEROO_IGD) + return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA); + else + return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_SPEED); +} + +static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id, + enum vga_switcheroo_state state) +{ + if (id == VGA_SWITCHEROO_IGD) + return 0; + + /* Optimus laptops have the card already disabled in + * nouveau_switcheroo_set_state */ + if (!nouveau_dsm_priv.dsm_detected) + return 0; + + return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state); +} + +static int nouveau_dsm_get_client_id(struct pci_dev *pdev) +{ + /* easy option one - intel vendor ID means Integrated */ + if (pdev->vendor == PCI_VENDOR_ID_INTEL) + return VGA_SWITCHEROO_IGD; + + /* is this device on Bus 0? - this may need improving */ + if (pdev->bus->number == 0) + return VGA_SWITCHEROO_IGD; + + return VGA_SWITCHEROO_DIS; +} + +static struct vga_switcheroo_handler nouveau_dsm_handler = { + .switchto = nouveau_dsm_switchto, + .power_state = nouveau_dsm_power_state, + .get_client_id = nouveau_dsm_get_client_id, +}; + +static int nouveau_dsm_pci_probe(struct pci_dev *pdev) +{ + acpi_handle dhandle; + int retval = 0; + + dhandle = ACPI_HANDLE(&pdev->dev); + if (!dhandle) + return false; + + if (!acpi_has_method(dhandle, "_DSM")) + return false; + + if (acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102, + 1 << NOUVEAU_DSM_POWER)) + retval |= NOUVEAU_DSM_HAS_MUX; + + if (nouveau_check_optimus_dsm(dhandle)) + retval |= NOUVEAU_DSM_HAS_OPT; + + if (retval & NOUVEAU_DSM_HAS_OPT) { + uint32_t result; + nouveau_optimus_dsm(dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, 0, + &result); + dev_info(&pdev->dev, "optimus capabilities: %s, status %s%s\n", + (result & OPTIMUS_ENABLED) ? "enabled" : "disabled", + (result & OPTIMUS_DYNAMIC_PWR_CAP) ? "dynamic power, " : "", + (result & OPTIMUS_HDA_CODEC_MASK) ? "hda bios codec supported" : ""); + } + if (retval) + nouveau_dsm_priv.dhandle = dhandle; + + return retval; +} + +static bool nouveau_dsm_detect(void) +{ + char acpi_method_name[255] = { 0 }; + struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name}; + struct pci_dev *pdev = NULL; + int has_dsm = 0; + int has_optimus = 0; + int vga_count = 0; + bool guid_valid; + int retval; + bool ret = false; + + /* lookup the MXM GUID */ + guid_valid = mxm_wmi_supported(); + + if (guid_valid) + printk("MXM: GUID detected in BIOS\n"); + + /* now do DSM detection */ + while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { + vga_count++; + + retval = nouveau_dsm_pci_probe(pdev); + if (retval & NOUVEAU_DSM_HAS_MUX) + has_dsm |= 1; + if (retval & NOUVEAU_DSM_HAS_OPT) + has_optimus = 1; + } + + while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_3D << 8, pdev)) != NULL) { + vga_count++; + + retval = nouveau_dsm_pci_probe(pdev); + if (retval & NOUVEAU_DSM_HAS_MUX) + has_dsm |= 1; + if (retval & NOUVEAU_DSM_HAS_OPT) + has_optimus = 1; + } + + /* find the optimus DSM or the old v1 DSM */ + if (has_optimus == 1) { + acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, + &buffer); + printk(KERN_INFO "VGA switcheroo: detected Optimus DSM method %s handle\n", + acpi_method_name); + nouveau_dsm_priv.optimus_detected = true; + ret = true; + } else if (vga_count == 2 && has_dsm && guid_valid) { + acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, + &buffer); + printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n", + acpi_method_name); + nouveau_dsm_priv.dsm_detected = true; + ret = true; + } + + + return ret; +} + +void nouveau_register_dsm_handler(void) +{ + bool r; + + r = nouveau_dsm_detect(); + if (!r) + return; + + vga_switcheroo_register_handler(&nouveau_dsm_handler); +} + +/* Must be called for Optimus models before the card can be turned off */ +void nouveau_switcheroo_optimus_dsm(void) +{ + u32 result = 0; + if (!nouveau_dsm_priv.optimus_detected) + return; + + nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_FLAGS, + 0x3, &result); + + nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, + NOUVEAU_DSM_OPTIMUS_SET_POWERDOWN, &result); + +} + +void nouveau_unregister_dsm_handler(void) +{ + if (nouveau_dsm_priv.optimus_detected || nouveau_dsm_priv.dsm_detected) + vga_switcheroo_unregister_handler(); +} +#else +void nouveau_register_dsm_handler(void) {} +void nouveau_unregister_dsm_handler(void) {} +void nouveau_switcheroo_optimus_dsm(void) {} +#endif + +/* retrieve the ROM in 4k blocks */ +static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios, + int offset, int len) +{ + acpi_status status; + union acpi_object rom_arg_elements[2], *obj; + struct acpi_object_list rom_arg; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; + + rom_arg.count = 2; + rom_arg.pointer = &rom_arg_elements[0]; + + rom_arg_elements[0].type = ACPI_TYPE_INTEGER; + rom_arg_elements[0].integer.value = offset; + + rom_arg_elements[1].type = ACPI_TYPE_INTEGER; + rom_arg_elements[1].integer.value = len; + + status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer); + if (ACPI_FAILURE(status)) { + printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status)); + return -ENODEV; + } + obj = (union acpi_object *)buffer.pointer; + memcpy(bios+offset, obj->buffer.pointer, len); + kfree(buffer.pointer); + return len; +} + +bool nouveau_acpi_rom_supported(struct pci_dev *pdev) +{ + acpi_status status; + acpi_handle dhandle, rom_handle; + + dhandle = ACPI_HANDLE(&pdev->dev); + if (!dhandle) + return false; + + status = acpi_get_handle(dhandle, "_ROM", &rom_handle); + if (ACPI_FAILURE(status)) + return false; + + nouveau_dsm_priv.rom_handle = rom_handle; + return true; +} + +int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len) +{ + return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len); +} + +void * +nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector) +{ + struct acpi_device *acpidev; + acpi_handle handle; + int type, ret; + void *edid; + + switch (connector->connector_type) { + case DRM_MODE_CONNECTOR_LVDS: + case DRM_MODE_CONNECTOR_eDP: + type = ACPI_VIDEO_DISPLAY_LCD; + break; + default: + return NULL; + } + + handle = ACPI_HANDLE(&dev->pdev->dev); + if (!handle) + return NULL; + + ret = acpi_bus_get_device(handle, &acpidev); + if (ret) + return NULL; + + ret = acpi_video_get_edid(acpidev, type, -1, &edid); + if (ret < 0) + return NULL; + + return kmemdup(edid, EDID_LENGTH, GFP_KERNEL); +} |