1 // SPDX-License-Identifier: GPL-2.0-only
37 	/* handle for device - and atpx */
81  * radeon_atpx_call - call an ATPX method
106 		atpx_arg_elements[1].buffer.length = params->length;  in radeon_atpx_call()
107 		atpx_arg_elements[1].buffer.pointer = params->pointer;  in radeon_atpx_call()
128  * radeon_atpx_parse_functions - parse supported functions
139 	f->px_params = mask & ATPX_GET_PX_PARAMETERS_SUPPORTED;  in radeon_atpx_parse_functions()
140 	f->power_cntl = mask & ATPX_POWER_CONTROL_SUPPORTED;  in radeon_atpx_parse_functions()
141 	f->disp_mux_cntl = mask & ATPX_DISPLAY_MUX_CONTROL_SUPPORTED;  in radeon_atpx_parse_functions()
142 	f->i2c_mux_cntl = mask & ATPX_I2C_MUX_CONTROL_SUPPORTED;  in radeon_atpx_parse_functions()
143 	f->switch_start = mask & ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED;  in radeon_atpx_parse_functions()
144 	f->switch_end = mask & ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED;  in radeon_atpx_parse_functions()
145 	f->disp_connectors_mapping = mask & ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED;  in radeon_atpx_parse_functions()
146 	f->disp_detetion_ports = mask & ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED;  in radeon_atpx_parse_functions()
150  * radeon_atpx_validate() - validate ATPX functions
161 	if (atpx->functions.px_params) {  in radeon_atpx_validate()
166 		info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_GET_PX_PARAMETERS, NULL);  in radeon_atpx_validate()
168 			return -EIO;  in radeon_atpx_validate()
172 		size = *(u16 *) info->buffer.pointer;  in radeon_atpx_validate()
176 			return -EINVAL;  in radeon_atpx_validate()
180 		memcpy(&output, info->buffer.pointer, size);  in radeon_atpx_validate()
189 		atpx->functions.i2c_mux_cntl = true;  in radeon_atpx_validate()
190 		atpx->functions.disp_mux_cntl = true;  in radeon_atpx_validate()
196 		atpx->functions.disp_mux_cntl = true;  in radeon_atpx_validate()
201 		atpx->functions.power_cntl = true;  in radeon_atpx_validate()
203 	atpx->is_hybrid = false;  in radeon_atpx_validate()
210 		atpx->functions.power_cntl = !radeon_atpx_priv.bridge_pm_usable;  in radeon_atpx_validate()
211 		atpx->is_hybrid = true;  in radeon_atpx_validate()
218  * radeon_atpx_verify_interface - verify ATPX
234 	info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);  in radeon_atpx_verify_interface()
236 		return -EIO;  in radeon_atpx_verify_interface()
240 	size = *(u16 *) info->buffer.pointer;  in radeon_atpx_verify_interface()
243 		err = -EINVAL;  in radeon_atpx_verify_interface()
248 	memcpy(&output, info->buffer.pointer, size);  in radeon_atpx_verify_interface()
254 	radeon_atpx_parse_functions(&atpx->functions, output.function_bits);  in radeon_atpx_verify_interface()
262  * radeon_atpx_set_discrete_state - power up/down discrete GPU
265  * @state: discrete GPU state (0 = power down, 1 = power up)
268  * power down/up the discrete GPU (all asics).
277 	if (atpx->functions.power_cntl) {  in radeon_atpx_set_discrete_state()
282 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_set_discrete_state()
286 			return -EIO;  in radeon_atpx_set_discrete_state()
297  * radeon_atpx_switch_disp_mux - switch display mux
300  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
303  * switch the display mux between the discrete GPU and integrated GPU
313 	if (atpx->functions.disp_mux_cntl) {  in radeon_atpx_switch_disp_mux()
318 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_switch_disp_mux()
322 			return -EIO;  in radeon_atpx_switch_disp_mux()
329  * radeon_atpx_switch_i2c_mux - switch i2c/hpd mux
332  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
335  * switch the i2c/hpd mux between the discrete GPU and integrated GPU
345 	if (atpx->functions.i2c_mux_cntl) {  in radeon_atpx_switch_i2c_mux()
350 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_switch_i2c_mux()
354 			return -EIO;  in radeon_atpx_switch_i2c_mux()
361  * radeon_atpx_switch_start - notify the sbios of a GPU switch
364  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
367  * function to notify the sbios that a switch between the discrete GPU and
368  * integrated GPU has begun (all asics).
377 	if (atpx->functions.switch_start) {  in radeon_atpx_switch_start()
382 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_switch_start()
386 			return -EIO;  in radeon_atpx_switch_start()
393  * radeon_atpx_switch_end - notify the sbios of a GPU switch
396  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
399  * function to notify the sbios that a switch between the discrete GPU and
400  * integrated GPU has ended (all asics).
409 	if (atpx->functions.switch_end) {  in radeon_atpx_switch_end()
414 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_switch_end()
418 			return -EIO;  in radeon_atpx_switch_end()
425  * radeon_atpx_switchto - switch to the requested GPU
427  * @id: GPU to switch to
429  * Execute the necessary ATPX functions to switch between the discrete GPU and
430  * integrated GPU (all asics).
433 static int radeon_atpx_switchto(enum vga_switcheroo_client_id id)  in radeon_atpx_switchto()  argument
437 	if (id == VGA_SWITCHEROO_IGD)  in radeon_atpx_switchto()
451  * radeon_atpx_power_state - power down/up the requested GPU
453  * @id: GPU to power down/up
456  * Execute the necessary ATPX function to power down/up the discrete GPU
460 static int radeon_atpx_power_state(enum vga_switcheroo_client_id id,  in radeon_atpx_power_state()  argument
463 	/* on w500 ACPI can't change intel gpu state */  in radeon_atpx_power_state()
464 	if (id == VGA_SWITCHEROO_IGD)  in radeon_atpx_power_state()
472  * radeon_atpx_pci_probe_handle - look up the ATPX handle
484 	dhandle = ACPI_HANDLE(&pdev->dev);  in radeon_atpx_pci_probe_handle()
498  * radeon_atpx_init - verify the ATPX interface
521  * radeon_atpx_get_client_id - get the client id
525  * look up whether we are the integrated or discrete GPU (all asics).
526  * Returns the client id.
530 	if (radeon_atpx_priv.dhandle == ACPI_HANDLE(&pdev->dev))  in radeon_atpx_get_client_id()
543  * radeon_atpx_detect - detect whether we have PX
564 		d3_supported |= parent_pdev && parent_pdev->bridge_d3;  in radeon_atpx_detect()
567 	/* some newer PX laptops mark the dGPU as a non-VGA display device */  in radeon_atpx_detect()
574 		d3_supported |= parent_pdev && parent_pdev->bridge_d3;  in radeon_atpx_detect()
590  * radeon_register_atpx_handler - register with vga_switcheroo
608  * radeon_unregister_atpx_handler - unregister with vga_switcheroo