2 * Copyright 2012 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
24 #include <linux/pci.h>
25 #include <linux/acpi.h>
26 #include <linux/slab.h>
27 #include <acpi/acpi_drivers.h>
28 #include <acpi/acpi_bus.h>
32 #include "drm_sarea.h"
33 #include "drm_crtc_helper.h"
35 #include "radeon_acpi.h"
37 #include <linux/vga_switcheroo.h>
39 struct atif_verify_interface {
40 u16 size; /* structure size in bytes (includes size field) */
41 u16 version; /* version */
42 u32 notification_mask; /* supported notifications mask */
43 u32 function_bits; /* supported functions bit vector */
46 /* Call the ATIF method
48 static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
49 struct acpi_buffer *params)
52 union acpi_object atif_arg_elements[2];
53 struct acpi_object_list atif_arg;
54 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
57 atif_arg.pointer = &atif_arg_elements[0];
59 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
60 atif_arg_elements[0].integer.value = function;
63 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
64 atif_arg_elements[1].buffer.length = params->length;
65 atif_arg_elements[1].buffer.pointer = params->pointer;
67 /* We need a second fake parameter */
68 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
69 atif_arg_elements[1].integer.value = 0;
72 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
74 /* Fail only if calling the method fails and ATIF is supported */
75 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
76 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
77 acpi_format_exception(status));
78 kfree(buffer.pointer);
82 return buffer.pointer;
85 static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask)
87 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
88 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
89 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
90 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
91 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
92 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
93 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
94 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
95 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
98 static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask)
100 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
101 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
102 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
103 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
104 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
105 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
106 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
107 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
108 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
109 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
112 static int radeon_atif_verify_interface(acpi_handle handle,
113 struct radeon_atif *atif)
115 union acpi_object *info;
116 struct atif_verify_interface output;
120 info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
124 memset(&output, 0, sizeof(output));
126 size = *(u16 *) info->buffer.pointer;
128 DRM_INFO("ATIF buffer is too small: %lu\n", size);
132 size = min(sizeof(output), size);
134 memcpy(&output, info->buffer.pointer, size);
136 /* TODO: check version? */
137 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
139 radeon_atif_parse_notification(&atif->notifications, output.notification_mask);
140 radeon_atif_parse_functions(&atif->functions, output.function_bits);
147 /* Call all ACPI methods here */
148 int radeon_acpi_init(struct radeon_device *rdev)
153 /* Get the device handle */
154 handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
156 /* No need to proceed if we're sure that ATIF is not supported */
157 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
160 /* Call the ATIF method */
161 ret = radeon_atif_verify_interface(handle, &rdev->atif);
163 DRM_DEBUG_DRIVER("Call to verify_interface failed: %d\n", ret);