drm/radeon/radeon_atpx_handler.c

1 // SPDX-License-Identifier: GPL-2.0-only
37 	/* handle for device - and atpx */
81  * radeon_atpx_call - call an ATPX method
84  * @function: the ATPX function to execute
85  * @params: ATPX function params
87  * Executes the requested ATPX function (all asics).
90 static union acpi_object *radeon_atpx_call(acpi_handle handle, int function,  in radeon_atpx_call()  argument
102 	atpx_arg_elements[0].integer.value = function;  in radeon_atpx_call()
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
131  * @mask: supported functions mask from ATPX
133  * Use the supported functions mask from ATPX function
137 static void radeon_atpx_parse_functions(struct radeon_atpx_functions *f, u32 mask)  in radeon_atpx_parse_functions()  argument
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
222  * Execute the ATPX_FUNCTION_VERIFY_INTERFACE ATPX function
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
267  * Execute the ATPX_FUNCTION_POWER_CONTROL ATPX function to
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
302  * Execute the ATPX_FUNCTION_DISPLAY_MUX_CONTROL ATPX function to
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
334  * Execute the ATPX_FUNCTION_I2C_MUX_CONTROL ATPX function to
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
367  * function to notify the sbios that a switch between the discrete GPU and
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
399  * function to notify the sbios that a switch between the discrete GPU and
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
451  * radeon_atpx_power_state - power down/up the requested GPU
456  * Execute the necessary ATPX function to power down/up the discrete GPU
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
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