drm/radeon: add initial support for ATCS ACPI methods

Just verify the interface and track what functions are
supported.  Not actually used yet.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index b5b16878f0cf..99a5c8445014 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1464,6 +1464,17 @@ struct radeon_atif {
         struct radeon_encoder *backlight_ctl;
 };
 
+struct radeon_atcs_functions {
+        bool get_ext_state;
+        bool pcie_perf_req;
+        bool pcie_dev_rdy;
+        bool pcie_bus_width;
+};
+
+struct radeon_atcs {
+        struct radeon_atcs_functions functions;
+};
+
 /*
  * Core structure, functions and helpers.
  */
@@ -1557,6 +1568,7 @@ struct radeon_device {
         struct mutex                    gpu_clock_mutex;
         /* ACPI interface */
         struct radeon_atif              atif;
+        struct radeon_atcs              atcs;
 };
 
 int radeon_device_init(struct radeon_device *rdev,