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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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48cc9b2c7d
I am under the impression that it only makes sense to call the ATIF method if the graphics device has an ACPI handle attached. So we could skip the call altogether if there is no such handle. Signed-off-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <linux/slab.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/acpi_bus.h>
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#include "drmP.h"
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#include "drm.h"
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#include "drm_sarea.h"
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#include "drm_crtc_helper.h"
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#include "radeon.h"
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#include <linux/vga_switcheroo.h>
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/* Call the ATIF method
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*
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* Note: currently we discard the output
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*/
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static int radeon_atif_call(acpi_handle handle)
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{
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acpi_status status;
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union acpi_object atif_arg_elements[2];
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struct acpi_object_list atif_arg;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
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atif_arg.count = 2;
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atif_arg.pointer = &atif_arg_elements[0];
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atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
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atif_arg_elements[0].integer.value = 0;
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atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
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atif_arg_elements[1].integer.value = 0;
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status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer);
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/* Fail only if calling the method fails and ATIF is supported */
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
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acpi_format_exception(status));
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kfree(buffer.pointer);
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return 1;
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}
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kfree(buffer.pointer);
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return 0;
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}
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/* Call all ACPI methods here */
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int radeon_acpi_init(struct radeon_device *rdev)
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{
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acpi_handle handle;
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int ret;
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/* Get the device handle */
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handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
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/* No need to proceed if we're sure that ATIF is not supported */
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if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
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return 0;
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/* Call the ATIF method */
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ret = radeon_atif_call(handle);
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if (ret)
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return ret;
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return 0;
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}
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