[PATCH 4.6 130/203] drm/amd/powerplay: need to notify system bios pcie device ready
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-07-25 22:11:25
Also in:
lkml
4.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Rex Zhu <redacted> commit 0a4fef559b69ae2e682c98f31d53a225fbda78bd upstream. before request performance state. Signed-off-by: Rex Zhu <redacted> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Ken Wang <redacted> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpu/drm/amd/powerplay/hwmgr/pp_acpi.c | 16 +++++++++++++++- drivers/gpu/drm/amd/powerplay/inc/pp_acpi.h | 1 + 2 files changed, 16 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/pp_acpi.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/pp_acpi.c@@ -21,6 +21,20 @@ bool acpi_atcs_functions_supported(void return result == 0 ? (output_buf.function_bits & (1 << (index - 1))) != 0 : false; } +bool acpi_atcs_notify_pcie_device_ready(void *device) +{ + int32_t temp_buffer = 1; + + return cgs_call_acpi_method(device, CGS_ACPI_METHOD_ATCS, + ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, + &temp_buffer, + NULL, + 0, + sizeof(temp_buffer), + 0); +} + + int acpi_pcie_perf_request(void *device, uint8_t perf_req, bool advertise) { struct atcs_pref_req_input atcs_input;
@@ -29,7 +43,7 @@ int acpi_pcie_perf_request(void *device, int result; struct cgs_system_info info = {0}; - if (!acpi_atcs_functions_supported(device, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST)) + if( 0 != acpi_atcs_notify_pcie_device_ready(device)) return -EINVAL; info.size = sizeof(struct cgs_system_info); --- a/drivers/gpu/drm/amd/powerplay/inc/pp_acpi.h +++ b/drivers/gpu/drm/amd/powerplay/inc/pp_acpi.h
@@ -26,3 +26,4 @@ extern bool acpi_atcs_functions_supporte extern int acpi_pcie_perf_request(void *device, uint8_t perf_req, bool advertise); +extern bool acpi_atcs_notify_pcie_device_ready(void *device);