[AMD Official Use Only - General]
Series is:
Reviewed-by: Alex Deucher
From: amd-gfx on behalf of Mario
Limonciello
Sent: Friday, October 13, 2023 3:26 PM
To: amd-gfx@lists.freedesktop.org
Cc: Limonciello, Mario
Subject: [PATCH 3/3] drm/amd: Read IMU FW version from scratch register during
hw_init
If the IMU version wasn't discovered from the header, such as when
the firmware was directly loaded by PSP then there is no firmware
version to show to userspace from sysfs or IOCTL.
The IMU F/W stores the version in the first scratch register though,
so fetch it in these cases to let the driver export.
Signed-off-by: Mario Limonciello
---
drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c | 4
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index f0957d060750..154b20492123 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -4373,6 +4373,10 @@ static int gfx_v11_0_hw_init(void *handle)
if (r)
return r;
+ /* get IMU version from HW if it's not set */
+ if (!adev->gfx.imu_fw_version)
+ adev->gfx.imu_fw_version = RREG32_SOC15(GC, 0,
regGFX_IMU_SCRATCH_0);
+
return r;
}
--
2.34.1
