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https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
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drm/amdgpu: add core driver (v4)
This adds the non-asic specific core driver code. v2: remove extra kconfig option v3: implement minor fixes from Fengguang Wu v4: fix cast in amdgpu_ucode.c Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Jammy Zhou <Jammy.Zhou@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
572
drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
Normal file
572
drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
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@@ -0,0 +1,572 @@
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/*
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* Copyright (c) 2010 Red Hat Inc.
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* Author : Dave Airlie <airlied@redhat.com>
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*
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* Licensed under GPLv2
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*
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* ATPX support for both Intel/ATI
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*/
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#include <linux/vga_switcheroo.h>
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <linux/pci.h>
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#include "amdgpu_acpi.h"
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struct amdgpu_atpx_functions {
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bool px_params;
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bool power_cntl;
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bool disp_mux_cntl;
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bool i2c_mux_cntl;
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bool switch_start;
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bool switch_end;
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bool disp_connectors_mapping;
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bool disp_detetion_ports;
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};
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struct amdgpu_atpx {
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acpi_handle handle;
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struct amdgpu_atpx_functions functions;
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};
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static struct amdgpu_atpx_priv {
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bool atpx_detected;
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/* handle for device - and atpx */
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acpi_handle dhandle;
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acpi_handle other_handle;
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struct amdgpu_atpx atpx;
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} amdgpu_atpx_priv;
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struct atpx_verify_interface {
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u16 size; /* structure size in bytes (includes size field) */
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u16 version; /* version */
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u32 function_bits; /* supported functions bit vector */
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} __packed;
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struct atpx_px_params {
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u16 size; /* structure size in bytes (includes size field) */
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u32 valid_flags; /* which flags are valid */
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u32 flags; /* flags */
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} __packed;
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struct atpx_power_control {
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u16 size;
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u8 dgpu_state;
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} __packed;
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struct atpx_mux {
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u16 size;
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u16 mux;
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} __packed;
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bool amdgpu_has_atpx(void) {
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return amdgpu_atpx_priv.atpx_detected;
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}
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/**
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* amdgpu_atpx_call - call an ATPX method
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*
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* @handle: acpi handle
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* @function: the ATPX function to execute
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* @params: ATPX function params
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*
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* Executes the requested ATPX function (all asics).
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* Returns a pointer to the acpi output buffer.
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*/
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static union acpi_object *amdgpu_atpx_call(acpi_handle handle, int function,
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struct acpi_buffer *params)
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{
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acpi_status status;
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union acpi_object atpx_arg_elements[2];
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struct acpi_object_list atpx_arg;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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atpx_arg.count = 2;
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atpx_arg.pointer = &atpx_arg_elements[0];
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atpx_arg_elements[0].type = ACPI_TYPE_INTEGER;
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atpx_arg_elements[0].integer.value = function;
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if (params) {
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atpx_arg_elements[1].type = ACPI_TYPE_BUFFER;
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atpx_arg_elements[1].buffer.length = params->length;
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atpx_arg_elements[1].buffer.pointer = params->pointer;
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} else {
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/* We need a second fake parameter */
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atpx_arg_elements[1].type = ACPI_TYPE_INTEGER;
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atpx_arg_elements[1].integer.value = 0;
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}
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status = acpi_evaluate_object(handle, NULL, &atpx_arg, &buffer);
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/* Fail only if calling the method fails and ATPX is supported */
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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printk("failed to evaluate ATPX got %s\n",
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acpi_format_exception(status));
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kfree(buffer.pointer);
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return NULL;
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}
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return buffer.pointer;
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}
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/**
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* amdgpu_atpx_parse_functions - parse supported functions
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*
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* @f: supported functions struct
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* @mask: supported functions mask from ATPX
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*
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* Use the supported functions mask from ATPX function
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* ATPX_FUNCTION_VERIFY_INTERFACE to determine what functions
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* are supported (all asics).
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*/
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static void amdgpu_atpx_parse_functions(struct amdgpu_atpx_functions *f, u32 mask)
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{
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f->px_params = mask & ATPX_GET_PX_PARAMETERS_SUPPORTED;
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f->power_cntl = mask & ATPX_POWER_CONTROL_SUPPORTED;
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f->disp_mux_cntl = mask & ATPX_DISPLAY_MUX_CONTROL_SUPPORTED;
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f->i2c_mux_cntl = mask & ATPX_I2C_MUX_CONTROL_SUPPORTED;
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f->switch_start = mask & ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED;
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f->switch_end = mask & ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED;
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f->disp_connectors_mapping = mask & ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED;
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f->disp_detetion_ports = mask & ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED;
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}
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/**
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* amdgpu_atpx_validate_functions - validate ATPX functions
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*
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* @atpx: amdgpu atpx struct
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*
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* Validate that required functions are enabled (all asics).
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* returns 0 on success, error on failure.
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*/
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static int amdgpu_atpx_validate(struct amdgpu_atpx *atpx)
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{
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/* make sure required functions are enabled */
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/* dGPU power control is required */
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atpx->functions.power_cntl = true;
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if (atpx->functions.px_params) {
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union acpi_object *info;
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struct atpx_px_params output;
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size_t size;
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u32 valid_bits;
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info = amdgpu_atpx_call(atpx->handle, ATPX_FUNCTION_GET_PX_PARAMETERS, NULL);
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if (!info)
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return -EIO;
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memset(&output, 0, sizeof(output));
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size = *(u16 *) info->buffer.pointer;
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if (size < 10) {
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printk("ATPX buffer is too small: %zu\n", size);
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kfree(info);
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return -EINVAL;
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}
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size = min(sizeof(output), size);
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memcpy(&output, info->buffer.pointer, size);
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valid_bits = output.flags & output.valid_flags;
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/* if separate mux flag is set, mux controls are required */
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if (valid_bits & ATPX_SEPARATE_MUX_FOR_I2C) {
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atpx->functions.i2c_mux_cntl = true;
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atpx->functions.disp_mux_cntl = true;
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}
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/* if any outputs are muxed, mux controls are required */
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if (valid_bits & (ATPX_CRT1_RGB_SIGNAL_MUXED |
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ATPX_TV_SIGNAL_MUXED |
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ATPX_DFP_SIGNAL_MUXED))
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atpx->functions.disp_mux_cntl = true;
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kfree(info);
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}
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return 0;
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}
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/**
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* amdgpu_atpx_verify_interface - verify ATPX
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*
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* @atpx: amdgpu atpx struct
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*
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* Execute the ATPX_FUNCTION_VERIFY_INTERFACE ATPX function
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* to initialize ATPX and determine what features are supported
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* (all asics).
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* returns 0 on success, error on failure.
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*/
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static int amdgpu_atpx_verify_interface(struct amdgpu_atpx *atpx)
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{
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union acpi_object *info;
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struct atpx_verify_interface output;
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size_t size;
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int err = 0;
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info = amdgpu_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);
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if (!info)
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return -EIO;
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memset(&output, 0, sizeof(output));
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size = *(u16 *) info->buffer.pointer;
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if (size < 8) {
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printk("ATPX buffer is too small: %zu\n", size);
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err = -EINVAL;
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goto out;
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}
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size = min(sizeof(output), size);
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memcpy(&output, info->buffer.pointer, size);
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/* TODO: check version? */
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printk("ATPX version %u, functions 0x%08x\n",
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output.version, output.function_bits);
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amdgpu_atpx_parse_functions(&atpx->functions, output.function_bits);
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out:
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kfree(info);
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return err;
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}
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/**
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* amdgpu_atpx_set_discrete_state - power up/down discrete GPU
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*
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* @atpx: atpx info struct
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* @state: discrete GPU state (0 = power down, 1 = power up)
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*
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* Execute the ATPX_FUNCTION_POWER_CONTROL ATPX function to
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* power down/up the discrete GPU (all asics).
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* Returns 0 on success, error on failure.
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*/
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static int amdgpu_atpx_set_discrete_state(struct amdgpu_atpx *atpx, u8 state)
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{
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struct acpi_buffer params;
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union acpi_object *info;
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struct atpx_power_control input;
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if (atpx->functions.power_cntl) {
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input.size = 3;
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input.dgpu_state = state;
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params.length = input.size;
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params.pointer = &input;
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info = amdgpu_atpx_call(atpx->handle,
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ATPX_FUNCTION_POWER_CONTROL,
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¶ms);
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if (!info)
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return -EIO;
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kfree(info);
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}
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return 0;
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}
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/**
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* amdgpu_atpx_switch_disp_mux - switch display mux
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*
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* @atpx: atpx info struct
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* @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
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*
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* Execute the ATPX_FUNCTION_DISPLAY_MUX_CONTROL ATPX function to
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* switch the display mux between the discrete GPU and integrated GPU
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* (all asics).
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* Returns 0 on success, error on failure.
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*/
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static int amdgpu_atpx_switch_disp_mux(struct amdgpu_atpx *atpx, u16 mux_id)
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{
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struct acpi_buffer params;
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union acpi_object *info;
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struct atpx_mux input;
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if (atpx->functions.disp_mux_cntl) {
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input.size = 4;
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input.mux = mux_id;
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params.length = input.size;
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params.pointer = &input;
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info = amdgpu_atpx_call(atpx->handle,
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ATPX_FUNCTION_DISPLAY_MUX_CONTROL,
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¶ms);
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if (!info)
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return -EIO;
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kfree(info);
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}
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return 0;
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}
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/**
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* amdgpu_atpx_switch_i2c_mux - switch i2c/hpd mux
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*
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* @atpx: atpx info struct
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* @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
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*
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* Execute the ATPX_FUNCTION_I2C_MUX_CONTROL ATPX function to
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* switch the i2c/hpd mux between the discrete GPU and integrated GPU
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* (all asics).
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* Returns 0 on success, error on failure.
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*/
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static int amdgpu_atpx_switch_i2c_mux(struct amdgpu_atpx *atpx, u16 mux_id)
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{
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struct acpi_buffer params;
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union acpi_object *info;
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struct atpx_mux input;
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if (atpx->functions.i2c_mux_cntl) {
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input.size = 4;
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input.mux = mux_id;
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params.length = input.size;
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params.pointer = &input;
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info = amdgpu_atpx_call(atpx->handle,
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ATPX_FUNCTION_I2C_MUX_CONTROL,
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¶ms);
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if (!info)
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return -EIO;
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kfree(info);
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}
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return 0;
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}
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/**
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* amdgpu_atpx_switch_start - notify the sbios of a GPU switch
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*
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* @atpx: atpx info struct
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* @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
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*
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* Execute the ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION ATPX
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* function to notify the sbios that a switch between the discrete GPU and
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* integrated GPU has begun (all asics).
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* Returns 0 on success, error on failure.
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*/
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static int amdgpu_atpx_switch_start(struct amdgpu_atpx *atpx, u16 mux_id)
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{
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struct acpi_buffer params;
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union acpi_object *info;
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struct atpx_mux input;
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if (atpx->functions.switch_start) {
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input.size = 4;
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input.mux = mux_id;
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params.length = input.size;
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params.pointer = &input;
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info = amdgpu_atpx_call(atpx->handle,
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ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION,
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¶ms);
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if (!info)
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return -EIO;
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kfree(info);
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}
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return 0;
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}
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/**
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* amdgpu_atpx_switch_end - notify the sbios of a GPU switch
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*
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* @atpx: atpx info struct
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* @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
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*
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* Execute the ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION ATPX
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* function to notify the sbios that a switch between the discrete GPU and
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* integrated GPU has ended (all asics).
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* Returns 0 on success, error on failure.
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*/
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static int amdgpu_atpx_switch_end(struct amdgpu_atpx *atpx, u16 mux_id)
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{
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struct acpi_buffer params;
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union acpi_object *info;
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struct atpx_mux input;
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if (atpx->functions.switch_end) {
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input.size = 4;
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input.mux = mux_id;
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params.length = input.size;
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params.pointer = &input;
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info = amdgpu_atpx_call(atpx->handle,
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ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION,
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¶ms);
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if (!info)
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return -EIO;
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kfree(info);
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}
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return 0;
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}
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/**
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* amdgpu_atpx_switchto - switch to the requested GPU
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*
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* @id: GPU to switch to
|
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*
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* Execute the necessary ATPX functions to switch between the discrete GPU and
|
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* integrated GPU (all asics).
|
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* Returns 0 on success, error on failure.
|
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*/
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static int amdgpu_atpx_switchto(enum vga_switcheroo_client_id id)
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{
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u16 gpu_id;
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if (id == VGA_SWITCHEROO_IGD)
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gpu_id = ATPX_INTEGRATED_GPU;
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else
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gpu_id = ATPX_DISCRETE_GPU;
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amdgpu_atpx_switch_start(&amdgpu_atpx_priv.atpx, gpu_id);
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amdgpu_atpx_switch_disp_mux(&amdgpu_atpx_priv.atpx, gpu_id);
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amdgpu_atpx_switch_i2c_mux(&amdgpu_atpx_priv.atpx, gpu_id);
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amdgpu_atpx_switch_end(&amdgpu_atpx_priv.atpx, gpu_id);
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return 0;
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}
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|
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/**
|
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* amdgpu_atpx_power_state - power down/up the requested GPU
|
||||
*
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||||
* @id: GPU to power down/up
|
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* @state: requested power state (0 = off, 1 = on)
|
||||
*
|
||||
* Execute the necessary ATPX function to power down/up the discrete GPU
|
||||
* (all asics).
|
||||
* Returns 0 on success, error on failure.
|
||||
*/
|
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static int amdgpu_atpx_power_state(enum vga_switcheroo_client_id id,
|
||||
enum vga_switcheroo_state state)
|
||||
{
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||||
/* on w500 ACPI can't change intel gpu state */
|
||||
if (id == VGA_SWITCHEROO_IGD)
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return 0;
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||||
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||||
amdgpu_atpx_set_discrete_state(&amdgpu_atpx_priv.atpx, state);
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||||
return 0;
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}
|
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|
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/**
|
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* amdgpu_atpx_pci_probe_handle - look up the ATPX handle
|
||||
*
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* @pdev: pci device
|
||||
*
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* Look up the ATPX handles (all asics).
|
||||
* Returns true if the handles are found, false if not.
|
||||
*/
|
||||
static bool amdgpu_atpx_pci_probe_handle(struct pci_dev *pdev)
|
||||
{
|
||||
acpi_handle dhandle, atpx_handle;
|
||||
acpi_status status;
|
||||
|
||||
dhandle = ACPI_HANDLE(&pdev->dev);
|
||||
if (!dhandle)
|
||||
return false;
|
||||
|
||||
status = acpi_get_handle(dhandle, "ATPX", &atpx_handle);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
amdgpu_atpx_priv.other_handle = dhandle;
|
||||
return false;
|
||||
}
|
||||
amdgpu_atpx_priv.dhandle = dhandle;
|
||||
amdgpu_atpx_priv.atpx.handle = atpx_handle;
|
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return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* amdgpu_atpx_init - verify the ATPX interface
|
||||
*
|
||||
* Verify the ATPX interface (all asics).
|
||||
* Returns 0 on success, error on failure.
|
||||
*/
|
||||
static int amdgpu_atpx_init(void)
|
||||
{
|
||||
int r;
|
||||
|
||||
/* set up the ATPX handle */
|
||||
r = amdgpu_atpx_verify_interface(&amdgpu_atpx_priv.atpx);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
/* validate the atpx setup */
|
||||
r = amdgpu_atpx_validate(&amdgpu_atpx_priv.atpx);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* amdgpu_atpx_get_client_id - get the client id
|
||||
*
|
||||
* @pdev: pci device
|
||||
*
|
||||
* look up whether we are the integrated or discrete GPU (all asics).
|
||||
* Returns the client id.
|
||||
*/
|
||||
static int amdgpu_atpx_get_client_id(struct pci_dev *pdev)
|
||||
{
|
||||
if (amdgpu_atpx_priv.dhandle == ACPI_HANDLE(&pdev->dev))
|
||||
return VGA_SWITCHEROO_IGD;
|
||||
else
|
||||
return VGA_SWITCHEROO_DIS;
|
||||
}
|
||||
|
||||
static struct vga_switcheroo_handler amdgpu_atpx_handler = {
|
||||
.switchto = amdgpu_atpx_switchto,
|
||||
.power_state = amdgpu_atpx_power_state,
|
||||
.init = amdgpu_atpx_init,
|
||||
.get_client_id = amdgpu_atpx_get_client_id,
|
||||
};
|
||||
|
||||
/**
|
||||
* amdgpu_atpx_detect - detect whether we have PX
|
||||
*
|
||||
* Check if we have a PX system (all asics).
|
||||
* Returns true if we have a PX system, false if not.
|
||||
*/
|
||||
static bool amdgpu_atpx_detect(void)
|
||||
{
|
||||
char acpi_method_name[255] = { 0 };
|
||||
struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
|
||||
struct pci_dev *pdev = NULL;
|
||||
bool has_atpx = false;
|
||||
int vga_count = 0;
|
||||
|
||||
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
|
||||
vga_count++;
|
||||
|
||||
has_atpx |= (amdgpu_atpx_pci_probe_handle(pdev) == true);
|
||||
}
|
||||
|
||||
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
|
||||
vga_count++;
|
||||
|
||||
has_atpx |= (amdgpu_atpx_pci_probe_handle(pdev) == true);
|
||||
}
|
||||
|
||||
if (has_atpx && vga_count == 2) {
|
||||
acpi_get_name(amdgpu_atpx_priv.atpx.handle, ACPI_FULL_PATHNAME, &buffer);
|
||||
printk(KERN_INFO "VGA switcheroo: detected switching method %s handle\n",
|
||||
acpi_method_name);
|
||||
amdgpu_atpx_priv.atpx_detected = true;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* amdgpu_register_atpx_handler - register with vga_switcheroo
|
||||
*
|
||||
* Register the PX callbacks with vga_switcheroo (all asics).
|
||||
*/
|
||||
void amdgpu_register_atpx_handler(void)
|
||||
{
|
||||
bool r;
|
||||
|
||||
/* detect if we have any ATPX + 2 VGA in the system */
|
||||
r = amdgpu_atpx_detect();
|
||||
if (!r)
|
||||
return;
|
||||
|
||||
vga_switcheroo_register_handler(&amdgpu_atpx_handler);
|
||||
}
|
||||
|
||||
/**
|
||||
* amdgpu_unregister_atpx_handler - unregister with vga_switcheroo
|
||||
*
|
||||
* Unregister the PX callbacks with vga_switcheroo (all asics).
|
||||
*/
|
||||
void amdgpu_unregister_atpx_handler(void)
|
||||
{
|
||||
vga_switcheroo_unregister_handler();
|
||||
}
|
||||
Reference in New Issue
Block a user