1 #include <linux/pci.h> 2 #include <linux/acpi.h> 3 #include <linux/slab.h> 4 #include <acpi/acpi_drivers.h> 5 #include <acpi/acpi_bus.h> 6 7 #include "drmP.h" 8 #include "drm.h" 9 #include "drm_sarea.h" 10 #include "drm_crtc_helper.h" 11 #include "radeon.h" 12 13 #include <linux/vga_switcheroo.h> 14 15 /* Call the ATIF method 16 * 17 * Note: currently we discard the output 18 */ 19 static int radeon_atif_call(acpi_handle handle) 20 { 21 acpi_status status; 22 union acpi_object atif_arg_elements[2]; 23 struct acpi_object_list atif_arg; 24 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; 25 26 atif_arg.count = 2; 27 atif_arg.pointer = &atif_arg_elements[0]; 28 29 atif_arg_elements[0].type = ACPI_TYPE_INTEGER; 30 atif_arg_elements[0].integer.value = 0; 31 atif_arg_elements[1].type = ACPI_TYPE_INTEGER; 32 atif_arg_elements[1].integer.value = 0; 33 34 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); 35 36 /* Fail only if calling the method fails and ATIF is supported */ 37 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 38 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", 39 acpi_format_exception(status)); 40 kfree(buffer.pointer); 41 return 1; 42 } 43 44 kfree(buffer.pointer); 45 return 0; 46 } 47 48 /* Call all ACPI methods here */ 49 int radeon_acpi_init(struct radeon_device *rdev) 50 { 51 acpi_handle handle; 52 int ret; 53 54 /* Get the device handle */ 55 handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev); 56 57 /* No need to proceed if we're sure that ATIF is not supported */ 58 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle) 59 return 0; 60 61 /* Call the ATIF method */ 62 ret = radeon_atif_call(handle); 63 if (ret) 64 return ret; 65 66 return 0; 67 } 68 69