1 // SPDX-License-Identifier: GPL-2.0-only
49 	/* handle for device - and atpx */
105  * amdgpu_atpx_call - call an ATPX method
130 		atpx_arg_elements[1].buffer.length = params->length;  in amdgpu_atpx_call()
131 		atpx_arg_elements[1].buffer.pointer = params->pointer;  in amdgpu_atpx_call()
152  * amdgpu_atpx_parse_functions - parse supported functions
163 	f->px_params = mask & ATPX_GET_PX_PARAMETERS_SUPPORTED;  in amdgpu_atpx_parse_functions()
164 	f->power_cntl = mask & ATPX_POWER_CONTROL_SUPPORTED;  in amdgpu_atpx_parse_functions()
165 	f->disp_mux_cntl = mask & ATPX_DISPLAY_MUX_CONTROL_SUPPORTED;  in amdgpu_atpx_parse_functions()
166 	f->i2c_mux_cntl = mask & ATPX_I2C_MUX_CONTROL_SUPPORTED;  in amdgpu_atpx_parse_functions()
167 	f->switch_start = mask & ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED;  in amdgpu_atpx_parse_functions()
168 	f->switch_end = mask & ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED;  in amdgpu_atpx_parse_functions()
169 	f->disp_connectors_mapping = mask & ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED;  in amdgpu_atpx_parse_functions()
170 	f->disp_detection_ports = mask & ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED;  in amdgpu_atpx_parse_functions()
174  * amdgpu_atpx_validate - validate ATPX functions
185 	if (atpx->functions.px_params) {  in amdgpu_atpx_validate()
190 		info = amdgpu_atpx_call(atpx->handle, ATPX_FUNCTION_GET_PX_PARAMETERS, NULL);  in amdgpu_atpx_validate()
192 			return -EIO;  in amdgpu_atpx_validate()
196 		size = *(u16 *) info->buffer.pointer;  in amdgpu_atpx_validate()
200 			return -EINVAL;  in amdgpu_atpx_validate()
204 		memcpy(&output, info->buffer.pointer, size);  in amdgpu_atpx_validate()
213 		atpx->functions.i2c_mux_cntl = true;  in amdgpu_atpx_validate()
214 		atpx->functions.disp_mux_cntl = true;  in amdgpu_atpx_validate()
220 		atpx->functions.disp_mux_cntl = true;  in amdgpu_atpx_validate()
226 		atpx->functions.power_cntl = true;  in amdgpu_atpx_validate()
228 	atpx->is_hybrid = false;  in amdgpu_atpx_validate()
232 			atpx->functions.power_cntl = true;  in amdgpu_atpx_validate()
233 			atpx->is_hybrid = false;  in amdgpu_atpx_validate()
240 			atpx->functions.power_cntl = !amdgpu_atpx_priv.bridge_pm_usable;  in amdgpu_atpx_validate()
241 			atpx->is_hybrid = true;  in amdgpu_atpx_validate()
245 	atpx->dgpu_req_power_for_displays = false;  in amdgpu_atpx_validate()
247 		atpx->dgpu_req_power_for_displays = true;  in amdgpu_atpx_validate()
253  * amdgpu_atpx_verify_interface - verify ATPX
269 	info = amdgpu_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);  in amdgpu_atpx_verify_interface()
271 		return -EIO;  in amdgpu_atpx_verify_interface()
275 	size = *(u16 *) info->buffer.pointer;  in amdgpu_atpx_verify_interface()
278 		err = -EINVAL;  in amdgpu_atpx_verify_interface()
283 	memcpy(&output, info->buffer.pointer, size);  in amdgpu_atpx_verify_interface()
289 	amdgpu_atpx_parse_functions(&atpx->functions, output.function_bits);  in amdgpu_atpx_verify_interface()
297  * amdgpu_atpx_set_discrete_state - power up/down discrete GPU
300  * @state: discrete GPU state (0 = power down, 1 = power up)
303  * power down/up the discrete GPU (all asics).
312 	if (atpx->functions.power_cntl) {  in amdgpu_atpx_set_discrete_state()
317 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_set_discrete_state()
321 			return -EIO;  in amdgpu_atpx_set_discrete_state()
332  * amdgpu_atpx_switch_disp_mux - switch display mux
335  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
338  * switch the display mux between the discrete GPU and integrated GPU
348 	if (atpx->functions.disp_mux_cntl) {  in amdgpu_atpx_switch_disp_mux()
353 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_switch_disp_mux()
357 			return -EIO;  in amdgpu_atpx_switch_disp_mux()
364  * amdgpu_atpx_switch_i2c_mux - switch i2c/hpd mux
367  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
370  * switch the i2c/hpd mux between the discrete GPU and integrated GPU
380 	if (atpx->functions.i2c_mux_cntl) {  in amdgpu_atpx_switch_i2c_mux()
385 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_switch_i2c_mux()
389 			return -EIO;  in amdgpu_atpx_switch_i2c_mux()
396  * amdgpu_atpx_switch_start - notify the sbios of a GPU switch
399  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
402  * function to notify the sbios that a switch between the discrete GPU and
403  * integrated GPU has begun (all asics).
412 	if (atpx->functions.switch_start) {  in amdgpu_atpx_switch_start()
417 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_switch_start()
421 			return -EIO;  in amdgpu_atpx_switch_start()
428  * amdgpu_atpx_switch_end - notify the sbios of a GPU switch
431  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
434  * function to notify the sbios that a switch between the discrete GPU and
435  * integrated GPU has ended (all asics).
444 	if (atpx->functions.switch_end) {  in amdgpu_atpx_switch_end()
449 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_switch_end()
453 			return -EIO;  in amdgpu_atpx_switch_end()
460  * amdgpu_atpx_switchto - switch to the requested GPU
462  * @id: GPU to switch to
464  * Execute the necessary ATPX functions to switch between the discrete GPU and
465  * integrated GPU (all asics).
468 static int amdgpu_atpx_switchto(enum vga_switcheroo_client_id id)  in amdgpu_atpx_switchto()  argument
472 	if (id == VGA_SWITCHEROO_IGD)  in amdgpu_atpx_switchto()
486  * amdgpu_atpx_power_state - power down/up the requested GPU
488  * @id: GPU to power down/up
491  * Execute the necessary ATPX function to power down/up the discrete GPU
495 static int amdgpu_atpx_power_state(enum vga_switcheroo_client_id id,  in amdgpu_atpx_power_state()  argument
498 	/* on w500 ACPI can't change intel gpu state */  in amdgpu_atpx_power_state()
499 	if (id == VGA_SWITCHEROO_IGD)  in amdgpu_atpx_power_state()
507  * amdgpu_atpx_pci_probe_handle - look up the ATPX handle
519 	dhandle = ACPI_HANDLE(&pdev->dev);  in amdgpu_atpx_pci_probe_handle()
534  * amdgpu_atpx_init - verify the ATPX interface
557  * amdgpu_atpx_get_client_id - get the client id
561  * look up whether we are the integrated or discrete GPU (all asics).
562  * Returns the client id.
566 	if (amdgpu_atpx_priv.dhandle == ACPI_HANDLE(&pdev->dev))  in amdgpu_atpx_get_client_id()
594 	while (p && p->chip_device != 0) {  in amdgpu_atpx_get_quirks()
595 		if (pdev->vendor == p->chip_vendor &&  in amdgpu_atpx_get_quirks()
596 		    pdev->device == p->chip_device &&  in amdgpu_atpx_get_quirks()
597 		    pdev->subsystem_vendor == p->subsys_vendor &&  in amdgpu_atpx_get_quirks()
598 		    pdev->subsystem_device == p->subsys_device) {  in amdgpu_atpx_get_quirks()
599 			amdgpu_atpx_priv.quirks |= p->px_quirk_flags;  in amdgpu_atpx_get_quirks()
607  * amdgpu_atpx_detect - detect whether we have PX
628 		d3_supported |= parent_pdev && parent_pdev->bridge_d3;  in amdgpu_atpx_detect()
638 		d3_supported |= parent_pdev && parent_pdev->bridge_d3;  in amdgpu_atpx_detect()
655  * amdgpu_register_atpx_handler - register with vga_switcheroo
673  * amdgpu_unregister_atpx_handler - unregister with vga_switcheroo