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path: root/drivers/gpu/drm/nouveau/nouveau_acpi.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_acpi.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_acpi.c71
1 files changed, 63 insertions, 8 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index e13f6af0037..d4bcca8a513 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -34,7 +34,7 @@
static struct nouveau_dsm_priv {
bool dsm_detected;
acpi_handle dhandle;
- acpi_handle dsm_handle;
+ acpi_handle rom_handle;
} nouveau_dsm_priv;
static const char nouveau_dsm_muid[] = {
@@ -107,9 +107,9 @@ static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switchero
static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
{
if (id == VGA_SWITCHEROO_IGD)
- return nouveau_dsm_switch_mux(nouveau_dsm_priv.dsm_handle, NOUVEAU_DSM_LED_STAMINA);
+ return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
else
- return nouveau_dsm_switch_mux(nouveau_dsm_priv.dsm_handle, NOUVEAU_DSM_LED_SPEED);
+ 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,
@@ -118,7 +118,7 @@ static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
if (id == VGA_SWITCHEROO_IGD)
return 0;
- return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dsm_handle, state);
+ return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
}
static int nouveau_dsm_init(void)
@@ -151,18 +151,18 @@ static bool nouveau_dsm_pci_probe(struct pci_dev *pdev)
dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
if (!dhandle)
return false;
+
status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle);
if (ACPI_FAILURE(status)) {
return false;
}
- ret= nouveau_dsm(nvidia_handle, NOUVEAU_DSM_SUPPORTED,
- NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result);
+ ret = nouveau_dsm(dhandle, NOUVEAU_DSM_SUPPORTED,
+ NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result);
if (ret < 0)
return false;
nouveau_dsm_priv.dhandle = dhandle;
- nouveau_dsm_priv.dsm_handle = nvidia_handle;
return true;
}
@@ -173,6 +173,7 @@ static bool nouveau_dsm_detect(void)
struct pci_dev *pdev = NULL;
int has_dsm = 0;
int vga_count = 0;
+
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
vga_count++;
@@ -180,7 +181,7 @@ static bool nouveau_dsm_detect(void)
}
if (vga_count == 2 && has_dsm) {
- acpi_get_name(nouveau_dsm_priv.dsm_handle, ACPI_FULL_PATHNAME, &buffer);
+ 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;
@@ -204,3 +205,57 @@ void nouveau_unregister_dsm_handler(void)
{
vga_switcheroo_unregister_handler();
}
+
+/* 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;
+
+ if (!nouveau_dsm_priv.dsm_detected)
+ return false;
+
+ dhandle = DEVICE_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);
+}