1/*
2 * Copyright 2012 Advanced Micro Devices, Inc.
3 *
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:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
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.
21 *
22 */
23
24#ifndef AMD_ACPI_H
25#define AMD_ACPI_H
26
27#define ACPI_AC_CLASS "ac_adapter"
28
29struct atif_verify_interface {
30 u16 size; /* structure size in bytes (includes size field) */
31 u16 version; /* version */
32 u32 notification_mask; /* supported notifications mask */
33 u32 function_bits; /* supported functions bit vector */
34} __packed;
35
36struct atif_system_params {
37 u16 size; /* structure size in bytes (includes size field) */
38 u32 valid_mask; /* valid flags mask */
39 u32 flags; /* flags */
40 u8 command_code; /* notify command code */
41} __packed;
42
43struct atif_sbios_requests {
44 u16 size; /* structure size in bytes (includes size field) */
45 u32 pending; /* pending sbios requests */
46 u8 panel_exp_mode; /* panel expansion mode */
47 u8 thermal_gfx; /* thermal state: target gfx controller */
48 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */
49 u8 forced_power_gfx; /* forced power state: target gfx controller */
50 u8 forced_power_state; /* forced power state: state id */
51 u8 system_power_src; /* system power source */
52 u8 backlight_level; /* panel backlight level (0-255) */
53} __packed;
54
55struct atif_qbtc_arguments {
56 u16 size; /* structure size in bytes (includes size field) */
57 u8 requested_display; /* which display is requested */
58} __packed;
59
60#define ATIF_QBTC_MAX_DATA_POINTS 99
61
62struct atif_qbtc_data_point {
63 u8 luminance; /* luminance in percent */
64 u8 input_signal; /* input signal in range 0-255 */
65} __packed;
66
67struct atif_qbtc_output {
68 u16 size; /* structure size in bytes (includes size field) */
69 u16 flags; /* all zeroes */
70 u8 error_code; /* error code */
71 u8 ac_level; /* default brightness on AC power */
72 u8 dc_level; /* default brightness on DC power */
73 u8 min_input_signal; /* max input signal in range 0-255 */
74 u8 max_input_signal; /* min input signal in range 0-255 */
75 u8 number_of_points; /* number of data points */
76 struct atif_qbtc_data_point data_points[ATIF_QBTC_MAX_DATA_POINTS];
77} __packed;
78static_assert(ATIF_QBTC_MAX_DATA_POINTS == MAX_LUMINANCE_DATA_POINTS);
79static_assert(sizeof(struct atif_qbtc_data_point) == sizeof(struct amdgpu_dm_luminance_data));
80
81#define ATIF_NOTIFY_MASK 0x3
82#define ATIF_NOTIFY_NONE 0
83#define ATIF_NOTIFY_81 1
84#define ATIF_NOTIFY_N 2
85
86struct atcs_verify_interface {
87 u16 size; /* structure size in bytes (includes size field) */
88 u16 version; /* version */
89 u32 function_bits; /* supported functions bit vector */
90} __packed;
91
92#define ATCS_VALID_FLAGS_MASK 0x3
93
94struct atcs_pref_req_input {
95 u16 size; /* structure size in bytes (includes size field) */
96 u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
97 u16 valid_flags_mask; /* valid flags mask */
98 u16 flags; /* flags */
99 u8 req_type; /* request type */
100 u8 perf_req; /* performance request */
101} __packed;
102
103struct atcs_pref_req_output {
104 u16 size; /* structure size in bytes (includes size field) */
105 u8 ret_val; /* return value */
106} __packed;
107
108struct atcs_pwr_shift_input {
109 u16 size; /* structure size in bytes (includes size field) */
110 u16 dgpu_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
111 u8 dev_acpi_state; /* D0 = 0, D3 hot = 3 */
112 u8 drv_state; /* 0 = operational, 1 = not operational */
113} __packed;
114
115/* AMD hw uses four ACPI control methods:
116 * 1. ATIF
117 * ARG0: (ACPI_INTEGER) function code
118 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
119 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
120 * ATIF provides an entry point for the gfx driver to interact with the sbios.
121 * The AMD ACPI notification mechanism uses Notify (VGA, 0x81) or a custom
122 * notification. Which notification is used as indicated by the ATIF Control
123 * Method GET_SYSTEM_PARAMETERS. When the driver receives Notify (VGA, 0x81) or
124 * a custom notification it invokes ATIF Control Method GET_SYSTEM_BIOS_REQUESTS
125 * to identify pending System BIOS requests and associated parameters. For
126 * example, if one of the pending requests is DISPLAY_SWITCH_REQUEST, the driver
127 * will perform display device detection and invoke ATIF Control Method
128 * SELECT_ACTIVE_DISPLAYS.
129 *
130 * 2. ATPX
131 * ARG0: (ACPI_INTEGER) function code
132 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
133 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
134 * ATPX methods are used on PowerXpress systems to handle mux switching and
135 * discrete GPU power control.
136 *
137 * 3. ATRM
138 * ARG0: (ACPI_INTEGER) offset of vbios rom data
139 * ARG1: (ACPI_BUFFER) size of the buffer to fill (up to 4K).
140 * OUTPUT: (ACPI_BUFFER) output buffer
141 * ATRM provides an interfacess to access the discrete GPU vbios image on
142 * PowerXpress systems with multiple GPUs.
143 *
144 * 4. ATCS
145 * ARG0: (ACPI_INTEGER) function code
146 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
147 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
148 * ATCS provides an interface to AMD chipset specific functionality.
149 *
150 */
151/* ATIF */
152#define ATIF_FUNCTION_VERIFY_INTERFACE 0x0
153/* ARG0: ATIF_FUNCTION_VERIFY_INTERFACE
154 * ARG1: none
155 * OUTPUT:
156 * WORD - structure size in bytes (includes size field)
157 * WORD - version
158 * DWORD - supported notifications mask
159 * DWORD - supported functions bit vector
160 */
161/* Notifications mask */
162# define ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED (1 << 2)
163# define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED (1 << 3)
164# define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED (1 << 4)
165# define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED (1 << 7)
166# define ATIF_DGPU_DISPLAY_EVENT_SUPPORTED (1 << 8)
167# define ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED (1 << 12)
168/* supported functions vector */
169# define ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED (1 << 0)
170# define ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED (1 << 1)
171# define ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED (1 << 12)
172# define ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED (1 << 15)
173# define ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED (1 << 16)
174# define ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED (1 << 20)
175#define ATIF_FUNCTION_GET_SYSTEM_PARAMETERS 0x1
176/* ARG0: ATIF_FUNCTION_GET_SYSTEM_PARAMETERS
177 * ARG1: none
178 * OUTPUT:
179 * WORD - structure size in bytes (includes size field)
180 * DWORD - valid flags mask
181 * DWORD - flags
182 *
183 * OR
184 *
185 * WORD - structure size in bytes (includes size field)
186 * DWORD - valid flags mask
187 * DWORD - flags
188 * BYTE - notify command code
189 *
190 * flags
191 * bits 1:0:
192 * 0 - Notify(VGA, 0x81) is not used for notification
193 * 1 - Notify(VGA, 0x81) is used for notification
194 * 2 - Notify(VGA, n) is used for notification where
195 * n (0xd0-0xd9) is specified in notify command code.
196 * bit 2:
197 * 1 - lid changes not reported though int10
198 * bit 3:
199 * 1 - system bios controls overclocking
200 * bit 4:
201 * 1 - enable overclocking
202 */
203#define ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS 0x2
204/* ARG0: ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS
205 * ARG1: none
206 * OUTPUT:
207 * WORD - structure size in bytes (includes size field)
208 * DWORD - pending sbios requests
209 * BYTE - reserved (all zeroes)
210 * BYTE - thermal state: target gfx controller
211 * BYTE - thermal state: state id (0: exit state, non-0: state)
212 * BYTE - forced power state: target gfx controller
213 * BYTE - forced power state: state id (0: forced state, non-0: state)
214 * BYTE - system power source
215 * BYTE - panel backlight level (0-255)
216 * BYTE - GPU package power limit: target gfx controller
217 * DWORD - GPU package power limit: value (24:8 fractional format, Watts)
218 */
219/* pending sbios requests */
220# define ATIF_THERMAL_STATE_CHANGE_REQUEST (1 << 2)
221# define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST (1 << 3)
222# define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST (1 << 4)
223# define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST (1 << 7)
224# define ATIF_DGPU_DISPLAY_EVENT (1 << 8)
225# define ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST (1 << 12)
226/* target gfx controller */
227# define ATIF_TARGET_GFX_SINGLE 0
228# define ATIF_TARGET_GFX_PX_IGPU 1
229# define ATIF_TARGET_GFX_PX_DGPU 2
230/* system power source */
231# define ATIF_POWER_SOURCE_AC 1
232# define ATIF_POWER_SOURCE_DC 2
233# define ATIF_POWER_SOURCE_RESTRICTED_AC_1 3
234# define ATIF_POWER_SOURCE_RESTRICTED_AC_2 4
235#define ATIF_FUNCTION_TEMPERATURE_CHANGE_NOTIFICATION 0xD
236/* ARG0: ATIF_FUNCTION_TEMPERATURE_CHANGE_NOTIFICATION
237 * ARG1:
238 * WORD - structure size in bytes (includes size field)
239 * WORD - gfx controller id
240 * BYTE - current temperature (degress Celsius)
241 * OUTPUT: none
242 */
243#define ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS 0x10
244/* ARG0: ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS
245 * ARG1:
246 * WORD - structure size in bytes (includes size field)
247 * BYTE - requested display
248 * OUTPUT:
249 * WORD - structure size in bytes (includes size field)
250 * WORD - flags (currently all 16 bits are reserved)
251 * BYTE - error code (on failure, disregard all below fields)
252 * BYTE - AC level (default brightness in percent when machine has full power)
253 * BYTE - DC level (default brightness in percent when machine is on battery)
254 * BYTE - min input signal, in range 0-255, corresponding to 0% backlight
255 * BYTE - max input signal, in range 0-255, corresponding to 100% backlight
256 * BYTE - number of reported data points
257 * BYTE - luminance level in percent \ repeated structure
258 * BYTE - input signal in range 0-255 / does not have entries for 0% and 100%
259 */
260/* requested display */
261# define ATIF_QBTC_REQUEST_LCD1 0
262# define ATIF_QBTC_REQUEST_CRT1 1
263# define ATIF_QBTC_REQUEST_DFP1 3
264# define ATIF_QBTC_REQUEST_CRT2 4
265# define ATIF_QBTC_REQUEST_LCD2 5
266# define ATIF_QBTC_REQUEST_DFP2 7
267# define ATIF_QBTC_REQUEST_DFP3 9
268# define ATIF_QBTC_REQUEST_DFP4 10
269# define ATIF_QBTC_REQUEST_DFP5 11
270# define ATIF_QBTC_REQUEST_DFP6 12
271/* error code */
272# define ATIF_QBTC_ERROR_CODE_SUCCESS 0
273# define ATIF_QBTC_ERROR_CODE_FAILURE 1
274# define ATIF_QBTC_ERROR_CODE_DEVICE_NOT_SUPPORTED 2
275#define ATIF_FUNCTION_READY_TO_UNDOCK_NOTIFICATION 0x11
276/* ARG0: ATIF_FUNCTION_READY_TO_UNDOCK_NOTIFICATION
277 * ARG1: none
278 * OUTPUT: none
279 */
280#define ATIF_FUNCTION_GET_EXTERNAL_GPU_INFORMATION 0x15
281/* ARG0: ATIF_FUNCTION_GET_EXTERNAL_GPU_INFORMATION
282 * ARG1: none
283 * OUTPUT:
284 * WORD - number of reported external gfx devices
285 * WORD - device structure size in bytes (excludes device size field)
286 * WORD - flags \
287 * WORD - bus number / repeated structure
288 */
289/* flags */
290# define ATIF_EXTERNAL_GRAPHICS_PORT (1 << 0)
291
292/* ATPX */
293#define ATPX_FUNCTION_VERIFY_INTERFACE 0x0
294/* ARG0: ATPX_FUNCTION_VERIFY_INTERFACE
295 * ARG1: none
296 * OUTPUT:
297 * WORD - structure size in bytes (includes size field)
298 * WORD - version
299 * DWORD - supported functions bit vector
300 */
301/* supported functions vector */
302# define ATPX_GET_PX_PARAMETERS_SUPPORTED (1 << 0)
303# define ATPX_POWER_CONTROL_SUPPORTED (1 << 1)
304# define ATPX_DISPLAY_MUX_CONTROL_SUPPORTED (1 << 2)
305# define ATPX_I2C_MUX_CONTROL_SUPPORTED (1 << 3)
306# define ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED (1 << 4)
307# define ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED (1 << 5)
308# define ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED (1 << 7)
309# define ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED (1 << 8)
310#define ATPX_FUNCTION_GET_PX_PARAMETERS 0x1
311/* ARG0: ATPX_FUNCTION_GET_PX_PARAMETERS
312 * ARG1: none
313 * OUTPUT:
314 * WORD - structure size in bytes (includes size field)
315 * DWORD - valid flags mask
316 * DWORD - flags
317 */
318/* flags */
319# define ATPX_LVDS_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 0)
320# define ATPX_CRT1_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 1)
321# define ATPX_DVI1_I2C_AVAILABLE_TO_BOTH_GPUS (1 << 2)
322# define ATPX_CRT1_RGB_SIGNAL_MUXED (1 << 3)
323# define ATPX_TV_SIGNAL_MUXED (1 << 4)
324# define ATPX_DFP_SIGNAL_MUXED (1 << 5)
325# define ATPX_SEPARATE_MUX_FOR_I2C (1 << 6)
326# define ATPX_DYNAMIC_PX_SUPPORTED (1 << 7)
327# define ATPX_ACF_NOT_SUPPORTED (1 << 8)
328# define ATPX_FIXED_NOT_SUPPORTED (1 << 9)
329# define ATPX_DYNAMIC_DGPU_POWER_OFF_SUPPORTED (1 << 10)
330# define ATPX_DGPU_REQ_POWER_FOR_DISPLAYS (1 << 11)
331# define ATPX_DGPU_CAN_DRIVE_DISPLAYS (1 << 12)
332# define ATPX_MS_HYBRID_GFX_SUPPORTED (1 << 14)
333#define ATPX_FUNCTION_POWER_CONTROL 0x2
334/* ARG0: ATPX_FUNCTION_POWER_CONTROL
335 * ARG1:
336 * WORD - structure size in bytes (includes size field)
337 * BYTE - dGPU power state (0: power off, 1: power on)
338 * OUTPUT: none
339 */
340#define ATPX_FUNCTION_DISPLAY_MUX_CONTROL 0x3
341/* ARG0: ATPX_FUNCTION_DISPLAY_MUX_CONTROL
342 * ARG1:
343 * WORD - structure size in bytes (includes size field)
344 * WORD - display mux control (0: iGPU, 1: dGPU)
345 * OUTPUT: none
346 */
347# define ATPX_INTEGRATED_GPU 0
348# define ATPX_DISCRETE_GPU 1
349#define ATPX_FUNCTION_I2C_MUX_CONTROL 0x4
350/* ARG0: ATPX_FUNCTION_I2C_MUX_CONTROL
351 * ARG1:
352 * WORD - structure size in bytes (includes size field)
353 * WORD - i2c/aux/hpd mux control (0: iGPU, 1: dGPU)
354 * OUTPUT: none
355 */
356#define ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION 0x5
357/* ARG0: ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION
358 * ARG1:
359 * WORD - structure size in bytes (includes size field)
360 * WORD - target gpu (0: iGPU, 1: dGPU)
361 * OUTPUT: none
362 */
363#define ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION 0x6
364/* ARG0: ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION
365 * ARG1:
366 * WORD - structure size in bytes (includes size field)
367 * WORD - target gpu (0: iGPU, 1: dGPU)
368 * OUTPUT: none
369 */
370#define ATPX_FUNCTION_GET_DISPLAY_CONNECTORS_MAPPING 0x8
371/* ARG0: ATPX_FUNCTION_GET_DISPLAY_CONNECTORS_MAPPING
372 * ARG1: none
373 * OUTPUT:
374 * WORD - number of display connectors
375 * WORD - connector structure size in bytes (excludes connector size field)
376 * BYTE - flags \
377 * BYTE - ATIF display vector bit position } repeated
378 * BYTE - adapter id (0: iGPU, 1-n: dGPU ordered by pcie bus number) } structure
379 * WORD - connector ACPI id /
380 */
381/* flags */
382# define ATPX_DISPLAY_OUTPUT_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 0)
383# define ATPX_DISPLAY_HPD_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 1)
384# define ATPX_DISPLAY_I2C_SUPPORTED_BY_ADAPTER_ID_DEVICE (1 << 2)
385#define ATPX_FUNCTION_GET_DISPLAY_DETECTION_PORTS 0x9
386/* ARG0: ATPX_FUNCTION_GET_DISPLAY_DETECTION_PORTS
387 * ARG1: none
388 * OUTPUT:
389 * WORD - number of HPD/DDC ports
390 * WORD - port structure size in bytes (excludes port size field)
391 * BYTE - ATIF display vector bit position \
392 * BYTE - hpd id } reapeated structure
393 * BYTE - ddc id /
394 *
395 * available on A+A systems only
396 */
397/* hpd id */
398# define ATPX_HPD_NONE 0
399# define ATPX_HPD1 1
400# define ATPX_HPD2 2
401# define ATPX_HPD3 3
402# define ATPX_HPD4 4
403# define ATPX_HPD5 5
404# define ATPX_HPD6 6
405/* ddc id */
406# define ATPX_DDC_NONE 0
407# define ATPX_DDC1 1
408# define ATPX_DDC2 2
409# define ATPX_DDC3 3
410# define ATPX_DDC4 4
411# define ATPX_DDC5 5
412# define ATPX_DDC6 6
413# define ATPX_DDC7 7
414# define ATPX_DDC8 8
415
416/* ATCS */
417#define ATCS_FUNCTION_VERIFY_INTERFACE 0x0
418/* ARG0: ATCS_FUNCTION_VERIFY_INTERFACE
419 * ARG1: none
420 * OUTPUT:
421 * WORD - structure size in bytes (includes size field)
422 * WORD - version
423 * DWORD - supported functions bit vector
424 */
425/* supported functions vector */
426# define ATCS_GET_EXTERNAL_STATE_SUPPORTED (1 << 0)
427# define ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED (1 << 1)
428# define ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED (1 << 2)
429# define ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED (1 << 3)
430# define ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED (1 << 7)
431#define ATCS_FUNCTION_GET_EXTERNAL_STATE 0x1
432/* ARG0: ATCS_FUNCTION_GET_EXTERNAL_STATE
433 * ARG1: none
434 * OUTPUT:
435 * WORD - structure size in bytes (includes size field)
436 * DWORD - valid flags mask
437 * DWORD - flags (0: undocked, 1: docked)
438 */
439/* flags */
440# define ATCS_DOCKED (1 << 0)
441#define ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST 0x2
442/* ARG0: ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST
443 * ARG1:
444 * WORD - structure size in bytes (includes size field)
445 * WORD - client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num)
446 * WORD - valid flags mask
447 * WORD - flags
448 * BYTE - request type
449 * BYTE - performance request
450 * OUTPUT:
451 * WORD - structure size in bytes (includes size field)
452 * BYTE - return value
453 */
454/* flags */
455# define ATCS_ADVERTISE_CAPS (1 << 0)
456# define ATCS_WAIT_FOR_COMPLETION (1 << 1)
457/* request type */
458# define ATCS_PCIE_LINK_SPEED 1
459/* performance request */
460# define ATCS_REMOVE 0
461# define ATCS_FORCE_LOW_POWER 1
462# define ATCS_PERF_LEVEL_1 2 /* PCIE Gen 1 */
463# define ATCS_PERF_LEVEL_2 3 /* PCIE Gen 2 */
464# define ATCS_PERF_LEVEL_3 4 /* PCIE Gen 3 */
465/* return value */
466# define ATCS_REQUEST_REFUSED 1
467# define ATCS_REQUEST_COMPLETE 2
468# define ATCS_REQUEST_IN_PROGRESS 3
469#define ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION 0x3
470/* ARG0: ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION
471 * ARG1: none
472 * OUTPUT: none
473 */
474#define ATCS_FUNCTION_SET_PCIE_BUS_WIDTH 0x4
475/* ARG0: ATCS_FUNCTION_SET_PCIE_BUS_WIDTH
476 * ARG1:
477 * WORD - structure size in bytes (includes size field)
478 * WORD - client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num)
479 * BYTE - number of active lanes
480 * OUTPUT:
481 * WORD - structure size in bytes (includes size field)
482 * BYTE - number of active lanes
483 */
484
485#define ATCS_FUNCTION_POWER_SHIFT_CONTROL 0x8
486/* ARG0: ATCS_FUNCTION_POWER_SHIFT_CONTROL
487 * ARG1:
488 * WORD - structure size in bytes (includes size field)
489 * WORD - dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num)
490 * BYTE - Device ACPI state
491 * BYTE - Driver state
492 * OUTPUT: none
493 */
494
495#endif
496

source code of linux/drivers/gpu/drm/amd/include/amd_acpi.h