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 <linux/power_supply.h>
28 #include <acpi/acpi_drivers.h>
29 #include <acpi/acpi_bus.h>
30 #include <acpi/video.h>
34 #include "drm_sarea.h"
35 #include "drm_crtc_helper.h"
37 #include "radeon_acpi.h"
40 #include <linux/vga_switcheroo.h>
42 #define ACPI_AC_CLASS "ac_adapter"
44 extern void radeon_pm_acpi_event_handler(struct radeon_device
*rdev
);
46 struct atif_verify_interface
{
47 u16 size
; /* structure size in bytes (includes size field) */
48 u16 version
; /* version */
49 u32 notification_mask
; /* supported notifications mask */
50 u32 function_bits
; /* supported functions bit vector */
53 struct atif_system_params
{
54 u16 size
; /* structure size in bytes (includes size field) */
55 u32 valid_mask
; /* valid flags mask */
56 u32 flags
; /* flags */
57 u8 command_code
; /* notify command code */
60 struct atif_sbios_requests
{
61 u16 size
; /* structure size in bytes (includes size field) */
62 u32 pending
; /* pending sbios requests */
63 u8 panel_exp_mode
; /* panel expansion mode */
64 u8 thermal_gfx
; /* thermal state: target gfx controller */
65 u8 thermal_state
; /* thermal state: state id (0: exit state, non-0: state) */
66 u8 forced_power_gfx
; /* forced power state: target gfx controller */
67 u8 forced_power_state
; /* forced power state: state id */
68 u8 system_power_src
; /* system power source */
69 u8 backlight_level
; /* panel backlight level (0-255) */
72 #define ATIF_NOTIFY_MASK 0x3
73 #define ATIF_NOTIFY_NONE 0
74 #define ATIF_NOTIFY_81 1
75 #define ATIF_NOTIFY_N 2
77 /* Call the ATIF method
79 static union acpi_object
*radeon_atif_call(acpi_handle handle
, int function
,
80 struct acpi_buffer
*params
)
83 union acpi_object atif_arg_elements
[2];
84 struct acpi_object_list atif_arg
;
85 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
88 atif_arg
.pointer
= &atif_arg_elements
[0];
90 atif_arg_elements
[0].type
= ACPI_TYPE_INTEGER
;
91 atif_arg_elements
[0].integer
.value
= function
;
94 atif_arg_elements
[1].type
= ACPI_TYPE_BUFFER
;
95 atif_arg_elements
[1].buffer
.length
= params
->length
;
96 atif_arg_elements
[1].buffer
.pointer
= params
->pointer
;
98 /* We need a second fake parameter */
99 atif_arg_elements
[1].type
= ACPI_TYPE_INTEGER
;
100 atif_arg_elements
[1].integer
.value
= 0;
103 status
= acpi_evaluate_object(handle
, "ATIF", &atif_arg
, &buffer
);
105 /* Fail only if calling the method fails and ATIF is supported */
106 if (ACPI_FAILURE(status
) && status
!= AE_NOT_FOUND
) {
107 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
108 acpi_format_exception(status
));
109 kfree(buffer
.pointer
);
113 return buffer
.pointer
;
116 static void radeon_atif_parse_notification(struct radeon_atif_notifications
*n
, u32 mask
)
118 n
->display_switch
= mask
& ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED
;
119 n
->expansion_mode_change
= mask
& ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED
;
120 n
->thermal_state
= mask
& ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED
;
121 n
->forced_power_state
= mask
& ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED
;
122 n
->system_power_state
= mask
& ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED
;
123 n
->display_conf_change
= mask
& ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED
;
124 n
->px_gfx_switch
= mask
& ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED
;
125 n
->brightness_change
= mask
& ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED
;
126 n
->dgpu_display_event
= mask
& ATIF_DGPU_DISPLAY_EVENT_SUPPORTED
;
129 static void radeon_atif_parse_functions(struct radeon_atif_functions
*f
, u32 mask
)
131 f
->system_params
= mask
& ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED
;
132 f
->sbios_requests
= mask
& ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED
;
133 f
->select_active_disp
= mask
& ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED
;
134 f
->lid_state
= mask
& ATIF_GET_LID_STATE_SUPPORTED
;
135 f
->get_tv_standard
= mask
& ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED
;
136 f
->set_tv_standard
= mask
& ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED
;
137 f
->get_panel_expansion_mode
= mask
& ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED
;
138 f
->set_panel_expansion_mode
= mask
& ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED
;
139 f
->temperature_change
= mask
& ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED
;
140 f
->graphics_device_types
= mask
& ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED
;
143 static int radeon_atif_verify_interface(acpi_handle handle
,
144 struct radeon_atif
*atif
)
146 union acpi_object
*info
;
147 struct atif_verify_interface output
;
151 info
= radeon_atif_call(handle
, ATIF_FUNCTION_VERIFY_INTERFACE
, NULL
);
155 memset(&output
, 0, sizeof(output
));
157 size
= *(u16
*) info
->buffer
.pointer
;
159 DRM_INFO("ATIF buffer is too small: %lu\n", size
);
163 size
= min(sizeof(output
), size
);
165 memcpy(&output
, info
->buffer
.pointer
, size
);
167 /* TODO: check version? */
168 DRM_DEBUG_DRIVER("ATIF version %u\n", output
.version
);
170 radeon_atif_parse_notification(&atif
->notifications
, output
.notification_mask
);
171 radeon_atif_parse_functions(&atif
->functions
, output
.function_bits
);
178 static int radeon_atif_get_notification_params(acpi_handle handle
,
179 struct radeon_atif_notification_cfg
*n
)
181 union acpi_object
*info
;
182 struct atif_system_params params
;
186 info
= radeon_atif_call(handle
, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS
, NULL
);
192 size
= *(u16
*) info
->buffer
.pointer
;
198 memset(¶ms
, 0, sizeof(params
));
199 size
= min(sizeof(params
), size
);
200 memcpy(¶ms
, info
->buffer
.pointer
, size
);
202 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
203 params
.flags
, params
.valid_mask
);
204 params
.flags
= params
.flags
& params
.valid_mask
;
206 if ((params
.flags
& ATIF_NOTIFY_MASK
) == ATIF_NOTIFY_NONE
) {
209 } else if ((params
.flags
& ATIF_NOTIFY_MASK
) == ATIF_NOTIFY_81
) {
211 n
->command_code
= 0x81;
218 n
->command_code
= params
.command_code
;
222 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
223 (n
->enabled
? "enabled" : "disabled"),
229 static int radeon_atif_get_sbios_requests(acpi_handle handle
,
230 struct atif_sbios_requests
*req
)
232 union acpi_object
*info
;
236 info
= radeon_atif_call(handle
, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS
, NULL
);
240 size
= *(u16
*)info
->buffer
.pointer
;
245 memset(req
, 0, sizeof(*req
));
247 size
= min(sizeof(*req
), size
);
248 memcpy(req
, info
->buffer
.pointer
, size
);
249 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req
->pending
);
251 count
= hweight32(req
->pending
);
258 int radeon_atif_handler(struct radeon_device
*rdev
,
259 struct acpi_bus_event
*event
)
261 struct radeon_atif
*atif
= &rdev
->atif
;
262 struct atif_sbios_requests req
;
266 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
267 event
->device_class
, event
->type
);
269 if (strcmp(event
->device_class
, ACPI_VIDEO_CLASS
) != 0)
272 if (!atif
->notification_cfg
.enabled
||
273 event
->type
!= atif
->notification_cfg
.command_code
)
277 /* Check pending SBIOS requests */
278 handle
= DEVICE_ACPI_HANDLE(&rdev
->pdev
->dev
);
279 count
= radeon_atif_get_sbios_requests(handle
, &req
);
284 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count
);
286 if (req
.pending
& ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST
) {
287 struct radeon_encoder
*enc
= atif
->backlight_ctl
;
290 struct radeon_encoder_atom_dig
*dig
= enc
->enc_priv
;
291 dig
->backlight_level
= req
.backlight_level
;
293 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
294 req
.backlight_level
);
296 atombios_set_panel_brightness(enc
);
298 backlight_force_update(dig
->bl_dev
,
299 BACKLIGHT_UPDATE_HOTKEY
);
302 /* TODO: check other events */
304 /* We've handled the event, stop the notifier chain. The ACPI interface
305 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
306 * userspace if the event was generated only to signal a SBIOS
312 static int radeon_acpi_event(struct notifier_block
*nb
,
316 struct radeon_device
*rdev
= container_of(nb
, struct radeon_device
, acpi_nb
);
317 struct acpi_bus_event
*entry
= (struct acpi_bus_event
*)data
;
319 if (strcmp(entry
->device_class
, ACPI_AC_CLASS
) == 0) {
320 if (power_supply_is_system_supplied() > 0)
321 DRM_DEBUG_DRIVER("pm: AC\n");
323 DRM_DEBUG_DRIVER("pm: DC\n");
325 radeon_pm_acpi_event_handler(rdev
);
328 /* Check for pending SBIOS requests */
329 return radeon_atif_handler(rdev
, entry
);
332 /* Call all ACPI methods here */
333 int radeon_acpi_init(struct radeon_device
*rdev
)
336 struct radeon_atif
*atif
= &rdev
->atif
;
339 /* Get the device handle */
340 handle
= DEVICE_ACPI_HANDLE(&rdev
->pdev
->dev
);
342 /* No need to proceed if we're sure that ATIF is not supported */
343 if (!ASIC_IS_AVIVO(rdev
) || !rdev
->bios
|| !handle
)
346 /* Call the ATIF method */
347 ret
= radeon_atif_verify_interface(handle
, atif
);
349 DRM_DEBUG_DRIVER("Call to verify_interface failed: %d\n", ret
);
353 if (atif
->notifications
.brightness_change
) {
354 struct drm_encoder
*tmp
;
355 struct radeon_encoder
*target
= NULL
;
357 /* Find the encoder controlling the brightness */
358 list_for_each_entry(tmp
, &rdev
->ddev
->mode_config
.encoder_list
,
360 struct radeon_encoder
*enc
= to_radeon_encoder(tmp
);
361 struct radeon_encoder_atom_dig
*dig
= enc
->enc_priv
;
363 if ((enc
->devices
& (ATOM_DEVICE_LCD_SUPPORT
)) &&
364 dig
->bl_dev
!= NULL
) {
370 atif
->backlight_ctl
= target
;
372 /* Brightness change notification is enabled, but we
373 * didn't find a backlight controller, this should
376 DRM_ERROR("Cannot find a backlight controller\n");
380 if (atif
->functions
.sbios_requests
&& !atif
->functions
.system_params
) {
381 /* XXX check this workraround, if sbios request function is
382 * present we have to see how it's configured in the system
385 atif
->functions
.system_params
= true;
388 if (atif
->functions
.system_params
) {
389 ret
= radeon_atif_get_notification_params(handle
,
390 &atif
->notification_cfg
);
392 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
394 /* Disable notification */
395 atif
->notification_cfg
.enabled
= false;
400 rdev
->acpi_nb
.notifier_call
= radeon_acpi_event
;
401 register_acpi_notifier(&rdev
->acpi_nb
);
406 void radeon_acpi_fini(struct radeon_device
*rdev
)
408 unregister_acpi_notifier(&rdev
->acpi_nb
);