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>
33 #include <drm/drm_crtc_helper.h>
35 #include "radeon_acpi.h"
38 #include <linux/vga_switcheroo.h>
40 #define ACPI_AC_CLASS "ac_adapter"
42 extern void radeon_pm_acpi_event_handler(struct radeon_device *rdev);
44 struct atif_verify_interface {
45 u16 size; /* structure size in bytes (includes size field) */
46 u16 version; /* version */
47 u32 notification_mask; /* supported notifications mask */
48 u32 function_bits; /* supported functions bit vector */
51 struct atif_system_params {
52 u16 size; /* structure size in bytes (includes size field) */
53 u32 valid_mask; /* valid flags mask */
54 u32 flags; /* flags */
55 u8 command_code; /* notify command code */
58 struct atif_sbios_requests {
59 u16 size; /* structure size in bytes (includes size field) */
60 u32 pending; /* pending sbios requests */
61 u8 panel_exp_mode; /* panel expansion mode */
62 u8 thermal_gfx; /* thermal state: target gfx controller */
63 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */
64 u8 forced_power_gfx; /* forced power state: target gfx controller */
65 u8 forced_power_state; /* forced power state: state id */
66 u8 system_power_src; /* system power source */
67 u8 backlight_level; /* panel backlight level (0-255) */
70 #define ATIF_NOTIFY_MASK 0x3
71 #define ATIF_NOTIFY_NONE 0
72 #define ATIF_NOTIFY_81 1
73 #define ATIF_NOTIFY_N 2
75 struct atcs_verify_interface {
76 u16 size; /* structure size in bytes (includes size field) */
77 u16 version; /* version */
78 u32 function_bits; /* supported functions bit vector */
81 /* Call the ATIF method
84 * radeon_atif_call - call an ATIF method
86 * @handle: acpi handle
87 * @function: the ATIF function to execute
88 * @params: ATIF function params
90 * Executes the requested ATIF function (all asics).
91 * Returns a pointer to the acpi output buffer.
93 static union acpi_object *radeon_atif_call(acpi_handle handle, int function,
94 struct acpi_buffer *params)
97 union acpi_object atif_arg_elements[2];
98 struct acpi_object_list atif_arg;
99 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
102 atif_arg.pointer = &atif_arg_elements[0];
104 atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
105 atif_arg_elements[0].integer.value = function;
108 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
109 atif_arg_elements[1].buffer.length = params->length;
110 atif_arg_elements[1].buffer.pointer = params->pointer;
112 /* We need a second fake parameter */
113 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
114 atif_arg_elements[1].integer.value = 0;
117 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
119 /* Fail only if calling the method fails and ATIF is supported */
120 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
121 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
122 acpi_format_exception(status));
123 kfree(buffer.pointer);
127 return buffer.pointer;
131 * radeon_atif_parse_notification - parse supported notifications
133 * @n: supported notifications struct
134 * @mask: supported notifications mask from ATIF
136 * Use the supported notifications mask from ATIF function
137 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
138 * are supported (all asics).
140 static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask)
142 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED;
143 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED;
144 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
145 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
146 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
147 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED;
148 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED;
149 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
150 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
154 * radeon_atif_parse_functions - parse supported functions
156 * @f: supported functions struct
157 * @mask: supported functions mask from ATIF
159 * Use the supported functions mask from ATIF function
160 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
161 * are supported (all asics).
163 static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask)
165 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
166 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
167 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED;
168 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED;
169 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED;
170 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED;
171 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED;
172 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED;
173 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
174 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;
178 * radeon_atif_verify_interface - verify ATIF
180 * @handle: acpi handle
181 * @atif: radeon atif struct
183 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
184 * to initialize ATIF and determine what features are supported
186 * returns 0 on success, error on failure.
188 static int radeon_atif_verify_interface(acpi_handle handle,
189 struct radeon_atif *atif)
191 union acpi_object *info;
192 struct atif_verify_interface output;
196 info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
200 memset(&output, 0, sizeof(output));
202 size = *(u16 *) info->buffer.pointer;
204 DRM_INFO("ATIF buffer is too small: %lu\n", size);
208 size = min(sizeof(output), size);
210 memcpy(&output, info->buffer.pointer, size);
212 /* TODO: check version? */
213 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
215 radeon_atif_parse_notification(&atif->notifications, output.notification_mask);
216 radeon_atif_parse_functions(&atif->functions, output.function_bits);
224 * radeon_atif_get_notification_params - determine notify configuration
226 * @handle: acpi handle
227 * @n: atif notification configuration struct
229 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
230 * to determine if a notifier is used and if so which one
231 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n)
232 * where n is specified in the result if a notifier is used.
233 * Returns 0 on success, error on failure.
235 static int radeon_atif_get_notification_params(acpi_handle handle,
236 struct radeon_atif_notification_cfg *n)
238 union acpi_object *info;
239 struct atif_system_params params;
243 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL);
249 size = *(u16 *) info->buffer.pointer;
255 memset(¶ms, 0, sizeof(params));
256 size = min(sizeof(params), size);
257 memcpy(¶ms, info->buffer.pointer, size);
259 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
260 params.flags, params.valid_mask);
261 params.flags = params.flags & params.valid_mask;
263 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
266 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
268 n->command_code = 0x81;
275 n->command_code = params.command_code;
279 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
280 (n->enabled ? "enabled" : "disabled"),
287 * radeon_atif_get_sbios_requests - get requested sbios event
289 * @handle: acpi handle
290 * @req: atif sbios request struct
292 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
293 * to determine what requests the sbios is making to the driver
295 * Returns 0 on success, error on failure.
297 static int radeon_atif_get_sbios_requests(acpi_handle handle,
298 struct atif_sbios_requests *req)
300 union acpi_object *info;
304 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL);
308 size = *(u16 *)info->buffer.pointer;
313 memset(req, 0, sizeof(*req));
315 size = min(sizeof(*req), size);
316 memcpy(req, info->buffer.pointer, size);
317 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
319 count = hweight32(req->pending);
327 * radeon_atif_handler - handle ATIF notify requests
329 * @rdev: radeon_device pointer
330 * @event: atif sbios request struct
332 * Checks the acpi event and if it matches an atif event,
334 * Returns NOTIFY code
336 int radeon_atif_handler(struct radeon_device *rdev,
337 struct acpi_bus_event *event)
339 struct radeon_atif *atif = &rdev->atif;
340 struct atif_sbios_requests req;
344 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
345 event->device_class, event->type);
347 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
350 if (!atif->notification_cfg.enabled ||
351 event->type != atif->notification_cfg.command_code)
355 /* Check pending SBIOS requests */
356 handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
357 count = radeon_atif_get_sbios_requests(handle, &req);
362 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
364 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
365 struct radeon_encoder *enc = atif->encoder_for_bl;
368 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
369 req.backlight_level);
371 radeon_set_backlight_level(rdev, enc, req.backlight_level);
373 if (rdev->is_atom_bios) {
374 struct radeon_encoder_atom_dig *dig = enc->enc_priv;
375 backlight_force_update(dig->bl_dev,
376 BACKLIGHT_UPDATE_HOTKEY);
378 struct radeon_encoder_lvds *dig = enc->enc_priv;
379 backlight_force_update(dig->bl_dev,
380 BACKLIGHT_UPDATE_HOTKEY);
384 /* TODO: check other events */
386 /* We've handled the event, stop the notifier chain. The ACPI interface
387 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
388 * userspace if the event was generated only to signal a SBIOS
394 /* Call the ATCS method
397 * radeon_atcs_call - call an ATCS method
399 * @handle: acpi handle
400 * @function: the ATCS function to execute
401 * @params: ATCS function params
403 * Executes the requested ATCS function (all asics).
404 * Returns a pointer to the acpi output buffer.
406 static union acpi_object *radeon_atcs_call(acpi_handle handle, int function,
407 struct acpi_buffer *params)
410 union acpi_object atcs_arg_elements[2];
411 struct acpi_object_list atcs_arg;
412 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
415 atcs_arg.pointer = &atcs_arg_elements[0];
417 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
418 atcs_arg_elements[0].integer.value = function;
421 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
422 atcs_arg_elements[1].buffer.length = params->length;
423 atcs_arg_elements[1].buffer.pointer = params->pointer;
425 /* We need a second fake parameter */
426 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
427 atcs_arg_elements[1].integer.value = 0;
430 status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer);
432 /* Fail only if calling the method fails and ATIF is supported */
433 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
434 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
435 acpi_format_exception(status));
436 kfree(buffer.pointer);
440 return buffer.pointer;
444 * radeon_atcs_parse_functions - parse supported functions
446 * @f: supported functions struct
447 * @mask: supported functions mask from ATCS
449 * Use the supported functions mask from ATCS function
450 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
451 * are supported (all asics).
453 static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask)
455 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
456 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
457 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
458 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
462 * radeon_atcs_verify_interface - verify ATCS
464 * @handle: acpi handle
465 * @atcs: radeon atcs struct
467 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
468 * to initialize ATCS and determine what features are supported
470 * returns 0 on success, error on failure.
472 static int radeon_atcs_verify_interface(acpi_handle handle,
473 struct radeon_atcs *atcs)
475 union acpi_object *info;
476 struct atcs_verify_interface output;
480 info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
484 memset(&output, 0, sizeof(output));
486 size = *(u16 *) info->buffer.pointer;
488 DRM_INFO("ATCS buffer is too small: %lu\n", size);
492 size = min(sizeof(output), size);
494 memcpy(&output, info->buffer.pointer, size);
496 /* TODO: check version? */
497 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
499 radeon_atcs_parse_functions(&atcs->functions, output.function_bits);
507 * radeon_acpi_event - handle notify events
509 * @nb: notifier block
513 * Calls relevant radeon functions in response to various
515 * Returns NOTIFY code
517 static int radeon_acpi_event(struct notifier_block *nb,
521 struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);
522 struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
524 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
525 if (power_supply_is_system_supplied() > 0)
526 DRM_DEBUG_DRIVER("pm: AC\n");
528 DRM_DEBUG_DRIVER("pm: DC\n");
530 radeon_pm_acpi_event_handler(rdev);
533 /* Check for pending SBIOS requests */
534 return radeon_atif_handler(rdev, entry);
537 /* Call all ACPI methods here */
539 * radeon_acpi_init - init driver acpi support
541 * @rdev: radeon_device pointer
543 * Verifies the AMD ACPI interfaces and registers with the acpi
544 * notifier chain (all asics).
545 * Returns 0 on success, error on failure.
547 int radeon_acpi_init(struct radeon_device *rdev)
550 struct radeon_atif *atif = &rdev->atif;
551 struct radeon_atcs *atcs = &rdev->atcs;
554 /* Get the device handle */
555 handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
557 /* No need to proceed if we're sure that ATIF is not supported */
558 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
561 /* Call the ATCS method */
562 ret = radeon_atcs_verify_interface(handle, atcs);
564 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
567 /* Call the ATIF method */
568 ret = radeon_atif_verify_interface(handle, atif);
570 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
574 if (atif->notifications.brightness_change) {
575 struct drm_encoder *tmp;
576 struct radeon_encoder *target = NULL;
578 /* Find the encoder controlling the brightness */
579 list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list,
581 struct radeon_encoder *enc = to_radeon_encoder(tmp);
583 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
585 if (rdev->is_atom_bios) {
586 struct radeon_encoder_atom_dig *dig = enc->enc_priv;
592 struct radeon_encoder_lvds *dig = enc->enc_priv;
601 atif->encoder_for_bl = target;
603 /* Brightness change notification is enabled, but we
604 * didn't find a backlight controller, this should
607 DRM_ERROR("Cannot find a backlight controller\n");
611 if (atif->functions.sbios_requests && !atif->functions.system_params) {
612 /* XXX check this workraround, if sbios request function is
613 * present we have to see how it's configured in the system
616 atif->functions.system_params = true;
619 if (atif->functions.system_params) {
620 ret = radeon_atif_get_notification_params(handle,
621 &atif->notification_cfg);
623 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
625 /* Disable notification */
626 atif->notification_cfg.enabled = false;
631 rdev->acpi_nb.notifier_call = radeon_acpi_event;
632 register_acpi_notifier(&rdev->acpi_nb);
638 * radeon_acpi_fini - tear down driver acpi support
640 * @rdev: radeon_device pointer
642 * Unregisters with the acpi notifier chain (all asics).
644 void radeon_acpi_fini(struct radeon_device *rdev)
646 unregister_acpi_notifier(&rdev->acpi_nb);