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drm/amd: Read IMU FW version from scratch register during hw_init

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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.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mario Limonciello 2023-10-13 14:26:04 -05:00 committed by Alex Deucher
parent 4916615fe9
commit e56690bb37
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
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@ -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;
}