1 // SPDX-License-Identifier: GPL-2.0-only
49 	/* handle for device - and atpx */
93  * amdgpu_atpx_call - call an ATPX method
118 		atpx_arg_elements[1].buffer.length = params->length;  in amdgpu_atpx_call()
119 		atpx_arg_elements[1].buffer.pointer = params->pointer;  in amdgpu_atpx_call()
140  * amdgpu_atpx_parse_functions - parse supported functions
151 	f->px_params = mask & ATPX_GET_PX_PARAMETERS_SUPPORTED;  in amdgpu_atpx_parse_functions()
152 	f->power_cntl = mask & ATPX_POWER_CONTROL_SUPPORTED;  in amdgpu_atpx_parse_functions()
153 	f->disp_mux_cntl = mask & ATPX_DISPLAY_MUX_CONTROL_SUPPORTED;  in amdgpu_atpx_parse_functions()
154 	f->i2c_mux_cntl = mask & ATPX_I2C_MUX_CONTROL_SUPPORTED;  in amdgpu_atpx_parse_functions()
155 	f->switch_start = mask & ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED;  in amdgpu_atpx_parse_functions()
156 	f->switch_end = mask & ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED;  in amdgpu_atpx_parse_functions()
157 	f->disp_connectors_mapping = mask & ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED;  in amdgpu_atpx_parse_functions()
158 	f->disp_detection_ports = mask & ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED;  in amdgpu_atpx_parse_functions()
162  * amdgpu_atpx_validate - validate ATPX functions
173 	if (atpx->functions.px_params) {  in amdgpu_atpx_validate()
178 		info = amdgpu_atpx_call(atpx->handle, ATPX_FUNCTION_GET_PX_PARAMETERS, NULL);  in amdgpu_atpx_validate()
180 			return -EIO;  in amdgpu_atpx_validate()
184 		size = *(u16 *) info->buffer.pointer;  in amdgpu_atpx_validate()
188 			return -EINVAL;  in amdgpu_atpx_validate()
192 		memcpy(&output, info->buffer.pointer, size);  in amdgpu_atpx_validate()
201 		atpx->functions.i2c_mux_cntl = true;  in amdgpu_atpx_validate()
202 		atpx->functions.disp_mux_cntl = true;  in amdgpu_atpx_validate()
208 		atpx->functions.disp_mux_cntl = true;  in amdgpu_atpx_validate()
214 		atpx->functions.power_cntl = true;  in amdgpu_atpx_validate()
216 	atpx->is_hybrid = false;  in amdgpu_atpx_validate()
220 			atpx->functions.power_cntl = true;  in amdgpu_atpx_validate()
221 			atpx->is_hybrid = false;  in amdgpu_atpx_validate()
228 			atpx->functions.power_cntl = !amdgpu_atpx_priv.bridge_pm_usable;  in amdgpu_atpx_validate()
229 			atpx->is_hybrid = true;  in amdgpu_atpx_validate()
233 	atpx->dgpu_req_power_for_displays = false;  in amdgpu_atpx_validate()
235 		atpx->dgpu_req_power_for_displays = true;  in amdgpu_atpx_validate()
241  * amdgpu_atpx_verify_interface - verify ATPX
257 	info = amdgpu_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);  in amdgpu_atpx_verify_interface()
259 		return -EIO;  in amdgpu_atpx_verify_interface()
263 	size = *(u16 *) info->buffer.pointer;  in amdgpu_atpx_verify_interface()
266 		err = -EINVAL;  in amdgpu_atpx_verify_interface()
271 	memcpy(&output, info->buffer.pointer, size);  in amdgpu_atpx_verify_interface()
277 	amdgpu_atpx_parse_functions(&atpx->functions, output.function_bits);  in amdgpu_atpx_verify_interface()
285  * amdgpu_atpx_set_discrete_state - power up/down discrete GPU
288  * @state: discrete GPU state (0 = power down, 1 = power up)
291  * power down/up the discrete GPU (all asics).
300 	if (atpx->functions.power_cntl) {  in amdgpu_atpx_set_discrete_state()
305 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_set_discrete_state()
309 			return -EIO;  in amdgpu_atpx_set_discrete_state()
320  * amdgpu_atpx_switch_disp_mux - switch display mux
323  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
326  * switch the display mux between the discrete GPU and integrated GPU
336 	if (atpx->functions.disp_mux_cntl) {  in amdgpu_atpx_switch_disp_mux()
341 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_switch_disp_mux()
345 			return -EIO;  in amdgpu_atpx_switch_disp_mux()
352  * amdgpu_atpx_switch_i2c_mux - switch i2c/hpd mux
355  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
358  * switch the i2c/hpd mux between the discrete GPU and integrated GPU
368 	if (atpx->functions.i2c_mux_cntl) {  in amdgpu_atpx_switch_i2c_mux()
373 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_switch_i2c_mux()
377 			return -EIO;  in amdgpu_atpx_switch_i2c_mux()
384  * amdgpu_atpx_switch_start - notify the sbios of a GPU switch
387  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
390  * function to notify the sbios that a switch between the discrete GPU and
391  * integrated GPU has begun (all asics).
400 	if (atpx->functions.switch_start) {  in amdgpu_atpx_switch_start()
405 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_switch_start()
409 			return -EIO;  in amdgpu_atpx_switch_start()
416  * amdgpu_atpx_switch_end - notify the sbios of a GPU switch
419  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
422  * function to notify the sbios that a switch between the discrete GPU and
423  * integrated GPU has ended (all asics).
432 	if (atpx->functions.switch_end) {  in amdgpu_atpx_switch_end()
437 		info = amdgpu_atpx_call(atpx->handle,  in amdgpu_atpx_switch_end()
441 			return -EIO;  in amdgpu_atpx_switch_end()
448  * amdgpu_atpx_switchto - switch to the requested GPU
450  * @id: GPU to switch to
452  * Execute the necessary ATPX functions to switch between the discrete GPU and
453  * integrated GPU (all asics).
456 static int amdgpu_atpx_switchto(enum vga_switcheroo_client_id id)  in amdgpu_atpx_switchto()  argument
460 	if (id == VGA_SWITCHEROO_IGD)  in amdgpu_atpx_switchto()
474  * amdgpu_atpx_power_state - power down/up the requested GPU
476  * @id: GPU to power down/up
479  * Execute the necessary ATPX function to power down/up the discrete GPU
483 static int amdgpu_atpx_power_state(enum vga_switcheroo_client_id id,  in amdgpu_atpx_power_state()  argument
486 	/* on w500 ACPI can't change intel gpu state */  in amdgpu_atpx_power_state()
487 	if (id == VGA_SWITCHEROO_IGD)  in amdgpu_atpx_power_state()
495  * amdgpu_atpx_pci_probe_handle - look up the ATPX handle
507 	dhandle = ACPI_HANDLE(&pdev->dev);  in amdgpu_atpx_pci_probe_handle()
522  * amdgpu_atpx_init - verify the ATPX interface
545  * amdgpu_atpx_get_client_id - get the client id
549  * look up whether we are the integrated or discrete GPU (all asics).
550  * Returns the client id.
554 	if (amdgpu_atpx_priv.dhandle == ACPI_HANDLE(&pdev->dev))  in amdgpu_atpx_get_client_id()
582 	while (p && p->chip_device != 0) {  in amdgpu_atpx_get_quirks()
583 		if (pdev->vendor == p->chip_vendor &&  in amdgpu_atpx_get_quirks()
584 		    pdev->device == p->chip_device &&  in amdgpu_atpx_get_quirks()
585 		    pdev->subsystem_vendor == p->subsys_vendor &&  in amdgpu_atpx_get_quirks()
586 		    pdev->subsystem_device == p->subsys_device) {  in amdgpu_atpx_get_quirks()
587 			amdgpu_atpx_priv.quirks |= p->px_quirk_flags;  in amdgpu_atpx_get_quirks()
595  * amdgpu_atpx_detect - detect whether we have PX
616 		d3_supported |= parent_pdev && parent_pdev->bridge_d3;  in amdgpu_atpx_detect()
626 		d3_supported |= parent_pdev && parent_pdev->bridge_d3;  in amdgpu_atpx_detect()
643  * amdgpu_register_atpx_handler - register with vga_switcheroo
661  * amdgpu_unregister_atpx_handler - unregister with vga_switcheroo