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 */ 19static 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 printk(KERN_DEBUG "failed to evaluate ATIF got %s\n", acpi_format_exception(status)); 39 kfree(buffer.pointer); 40 return 1; 41 } 42 43 kfree(buffer.pointer); 44 return 0; 45} 46 47/* Call all ACPI methods here */ 48int radeon_acpi_init(struct radeon_device *rdev) 49{ 50 acpi_handle handle; 51 int ret; 52 53 /* No need to proceed if we're sure that ATIF is not supported */ 54 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios) 55 return 0; 56 57 /* Get the device handle */ 58 handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev); 59 60 /* Call the ATIF method */ 61 ret = radeon_atif_call(handle); 62 if (ret) 63 return ret; 64 65 return 0; 66} 67