From: Lijo Lazar <lijo.lazar@xxxxxxx>
In certain configs, TMR information is available from ACPI. Add API to
fetch the information.
Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 7 +++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 20 ++++++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 196c2a8a6b48..65b3aeef37ed 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1421,6 +1421,8 @@ int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
u8 dev_state, bool drv_state);
int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state);
int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev);
+int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
+ u64 *tmr_size);
void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps);
bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev);
@@ -1428,6 +1430,11 @@ void amdgpu_acpi_detect(void);
void amdgpu_acpi_release(void);
#else
static inline int amdgpu_acpi_init(struct amdgpu_device *adev) { return 0; }
+static inline int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev,
+ u64 *tmr_offset, u64 *tmr_size)
+{
+ return -EINVAL;
+}
static inline void amdgpu_acpi_fini(struct amdgpu_device *adev) { }
static inline bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev) { return false; }
static inline void amdgpu_acpi_detect(void) { }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
index d9cc07e01293..52c16b041193 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -1072,6 +1072,26 @@ static int amdgpu_acpi_enumerate_xcc(void)
return 0;
}
+int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
+ u64 *tmr_size)
+{
+ struct amdgpu_acpi_dev_info *dev_info;
+ u16 bdf;
+
+ if (!tmr_offset || !tmr_size)
+ return -EINVAL;
+
+ bdf = (adev->pdev->bus->number << 8) | adev->pdev->devfn;
+ dev_info = amdgpu_acpi_get_dev(bdf);
+ if (!dev_info)
+ return -ENOENT;
+
+ *tmr_offset = dev_info->tmr_base;
+ *tmr_size = dev_info->tmr_size;
+
+ return 0;
+}
+
/**
* amdgpu_acpi_event - handle notify events
*
--
2.40.1
