BACO dummy mode could be set under reset conditions and that affects
framebuffer access. Check If baco dummy mode is set, unset it if so.
Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
Signed-off-by: Le Ma <le.ma@xxxxxxx>
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Reviewed-by: Asad Kamal <asad.kamal@xxxxxxx>
Tested-by: Asad Kamal <asad.kamal@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c
index 9ea072374cb7..f85eec05d218 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_9.c
@@ -437,6 +437,24 @@ static void nbio_v7_9_init_registers(struct amdgpu_device *adev)
XCC_DOORBELL_FENCE__SHUB_SLV_MODE_MASK);
}
+
+ if (!amdgpu_sriov_vf(adev)) {
+ u32 baco_cntl;
+ for_each_inst(i, adev->aid_mask) {
+ baco_cntl = RREG32_SOC15(NBIO, i, regBIF_BX0_BACO_CNTL);
+ if (baco_cntl & (BIF_BX0_BACO_CNTL__BACO_DUMMY_EN_MASK |
+ BIF_BX0_BACO_CNTL__BACO_EN_MASK)) {
+ baco_cntl &= ~(
+ BIF_BX0_BACO_CNTL__BACO_DUMMY_EN_MASK |
+ BIF_BX0_BACO_CNTL__BACO_EN_MASK);
+ dev_dbg(adev->dev,
+ "Unsetting baco dummy mode %x",
+ baco_cntl);
+ WREG32_SOC15(NBIO, i, regBIF_BX0_BACO_CNTL,
+ baco_cntl);
+ }
+ }
+ }
}
static u64 nbio_v7_9_get_pcie_replay_count(struct amdgpu_device *adev)
--
2.25.1
