1 // SPDX-License-Identifier: GPL-2.0-only
37 	/* handle for device - and atpx */
85  * radeon_atpx_call - call an ATPX method
110 		atpx_arg_elements[1].buffer.length = params->length;  in radeon_atpx_call()
111 		atpx_arg_elements[1].buffer.pointer = params->pointer;  in radeon_atpx_call()
132  * radeon_atpx_parse_functions - parse supported functions
143 	f->px_params = mask & ATPX_GET_PX_PARAMETERS_SUPPORTED;  in radeon_atpx_parse_functions()
144 	f->power_cntl = mask & ATPX_POWER_CONTROL_SUPPORTED;  in radeon_atpx_parse_functions()
145 	f->disp_mux_cntl = mask & ATPX_DISPLAY_MUX_CONTROL_SUPPORTED;  in radeon_atpx_parse_functions()
146 	f->i2c_mux_cntl = mask & ATPX_I2C_MUX_CONTROL_SUPPORTED;  in radeon_atpx_parse_functions()
147 	f->switch_start = mask & ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED;  in radeon_atpx_parse_functions()
148 	f->switch_end = mask & ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED;  in radeon_atpx_parse_functions()
149 	f->disp_connectors_mapping = mask & ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED;  in radeon_atpx_parse_functions()
150 	f->disp_detetion_ports = mask & ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED;  in radeon_atpx_parse_functions()
154  * radeon_atpx_validate() - validate ATPX functions
165 	if (atpx->functions.px_params) {  in radeon_atpx_validate()
170 		info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_GET_PX_PARAMETERS, NULL);  in radeon_atpx_validate()
172 			return -EIO;  in radeon_atpx_validate()
176 		size = *(u16 *) info->buffer.pointer;  in radeon_atpx_validate()
180 			return -EINVAL;  in radeon_atpx_validate()
184 		memcpy(&output, info->buffer.pointer, size);  in radeon_atpx_validate()
193 		atpx->functions.i2c_mux_cntl = true;  in radeon_atpx_validate()
194 		atpx->functions.disp_mux_cntl = true;  in radeon_atpx_validate()
200 		atpx->functions.disp_mux_cntl = true;  in radeon_atpx_validate()
205 		atpx->functions.power_cntl = true;  in radeon_atpx_validate()
207 	atpx->is_hybrid = false;  in radeon_atpx_validate()
214 		atpx->functions.power_cntl = !radeon_atpx_priv.bridge_pm_usable;  in radeon_atpx_validate()
215 		atpx->is_hybrid = true;  in radeon_atpx_validate()
222  * radeon_atpx_verify_interface - verify ATPX
238 	info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);  in radeon_atpx_verify_interface()
240 		return -EIO;  in radeon_atpx_verify_interface()
244 	size = *(u16 *) info->buffer.pointer;  in radeon_atpx_verify_interface()
247 		err = -EINVAL;  in radeon_atpx_verify_interface()
252 	memcpy(&output, info->buffer.pointer, size);  in radeon_atpx_verify_interface()
258 	radeon_atpx_parse_functions(&atpx->functions, output.function_bits);  in radeon_atpx_verify_interface()
266  * radeon_atpx_set_discrete_state - power up/down discrete GPU
269  * @state: discrete GPU state (0 = power down, 1 = power up)
272  * power down/up the discrete GPU (all asics).
281 	if (atpx->functions.power_cntl) {  in radeon_atpx_set_discrete_state()
286 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_set_discrete_state()
290 			return -EIO;  in radeon_atpx_set_discrete_state()
301  * radeon_atpx_switch_disp_mux - switch display mux
304  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
307  * switch the display mux between the discrete GPU and integrated GPU
317 	if (atpx->functions.disp_mux_cntl) {  in radeon_atpx_switch_disp_mux()
322 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_switch_disp_mux()
326 			return -EIO;  in radeon_atpx_switch_disp_mux()
333  * radeon_atpx_switch_i2c_mux - switch i2c/hpd mux
336  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
339  * switch the i2c/hpd mux between the discrete GPU and integrated GPU
349 	if (atpx->functions.i2c_mux_cntl) {  in radeon_atpx_switch_i2c_mux()
354 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_switch_i2c_mux()
358 			return -EIO;  in radeon_atpx_switch_i2c_mux()
365  * radeon_atpx_switch_start - notify the sbios of a GPU switch
368  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
371  * function to notify the sbios that a switch between the discrete GPU and
372  * integrated GPU has begun (all asics).
381 	if (atpx->functions.switch_start) {  in radeon_atpx_switch_start()
386 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_switch_start()
390 			return -EIO;  in radeon_atpx_switch_start()
397  * radeon_atpx_switch_end - notify the sbios of a GPU switch
400  * @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
403  * function to notify the sbios that a switch between the discrete GPU and
404  * integrated GPU has ended (all asics).
413 	if (atpx->functions.switch_end) {  in radeon_atpx_switch_end()
418 		info = radeon_atpx_call(atpx->handle,  in radeon_atpx_switch_end()
422 			return -EIO;  in radeon_atpx_switch_end()
429  * radeon_atpx_switchto - switch to the requested GPU
431  * @id: GPU to switch to
433  * Execute the necessary ATPX functions to switch between the discrete GPU and
434  * integrated GPU (all asics).
437 static int radeon_atpx_switchto(enum vga_switcheroo_client_id id)  in radeon_atpx_switchto()  argument
441 	if (id == VGA_SWITCHEROO_IGD)  in radeon_atpx_switchto()
455  * radeon_atpx_power_state - power down/up the requested GPU
457  * @id: GPU to power down/up
460  * Execute the necessary ATPX function to power down/up the discrete GPU
464 static int radeon_atpx_power_state(enum vga_switcheroo_client_id id,  in radeon_atpx_power_state()  argument
467 	/* on w500 ACPI can't change intel gpu state */  in radeon_atpx_power_state()
468 	if (id == VGA_SWITCHEROO_IGD)  in radeon_atpx_power_state()
476  * radeon_atpx_pci_probe_handle - look up the ATPX handle
488 	dhandle = ACPI_HANDLE(&pdev->dev);  in radeon_atpx_pci_probe_handle()
502  * radeon_atpx_init - verify the ATPX interface
525  * radeon_atpx_get_client_id - get the client id
529  * look up whether we are the integrated or discrete GPU (all asics).
530  * Returns the client id.
534 	if (radeon_atpx_priv.dhandle == ACPI_HANDLE(&pdev->dev))  in radeon_atpx_get_client_id()
547  * radeon_atpx_detect - detect whether we have PX
568 		d3_supported |= parent_pdev && parent_pdev->bridge_d3;  in radeon_atpx_detect()
571 	/* some newer PX laptops mark the dGPU as a non-VGA display device */  in radeon_atpx_detect()
578 		d3_supported |= parent_pdev && parent_pdev->bridge_d3;  in radeon_atpx_detect()
594  * radeon_register_atpx_handler - register with vga_switcheroo
612  * radeon_unregister_atpx_handler - unregister with vga_switcheroo