[ 55/60] drm/radeon: fix halting UVD

Greg Kroah-Hartman
2013-08-13T06:33:50Z

From: Christian König <christian.koenig@amd.com>

commit 2858c00d2823c83acce2a1175dbabb2cebee8678 upstream.

Removing the clock/power or resetting the VCPU can cause
hangs if that happens in the middle of a register write.

Stall the memory and register bus before putting the VCPU
into reset. Keep it in reset when unloading the module or
suspending.

v2: rebased on 3.10-stable tree

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/radeon/evergreen.c | 3 ++-
drivers/gpu/drm/radeon/ni.c | 3 ++-
drivers/gpu/drm/radeon/r600.c | 28 +++++++++++++++++++++++-----
drivers/gpu/drm/radeon/radeon_asic.h | 2 +-
drivers/gpu/drm/radeon/rv770.c | 2 ++
drivers/gpu/drm/radeon/si.c | 6 ++++--
6 files changed, 34 insertions(+), 10 deletions(-)

--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -4854,10 +4854,10 @@ int evergreen_resume(struct radeon_devic
int evergreen_suspend(struct radeon_device *rdev)
{
r600_audio_fini(rdev);
+ r600_uvd_stop(rdev);
radeon_uvd_suspend(rdev);
r700_cp_stop(rdev);
r600_dma_stop(rdev);
- r600_uvd_rbc_stop(rdev);
evergreen_irq_suspend(rdev);
radeon_wb_disable(rdev);
evergreen_pcie_gart_disable(rdev);
@@ -4988,6 +4988,7 @@ void evergreen_fini(struct radeon_device
radeon_ib_pool_fini(rdev);
radeon_irq_kms_fini(rdev);
evergreen_pcie_gart_fini(rdev);
+ r600_uvd_stop(rdev);
radeon_uvd_fini(rdev);
r600_vram_scratch_fini(rdev);
radeon_gem_fini(rdev);
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -2133,7 +2133,7 @@ int cayman_suspend(struct radeon_device
radeon_vm_manager_fini(rdev);
cayman_cp_enable(rdev, false);
cayman_dma_stop(rdev);
- r600_uvd_rbc_stop(rdev);
+ r600_uvd_stop(rdev);
radeon_uvd_suspend(rdev);
evergreen_irq_suspend(rdev);
radeon_wb_disable(rdev);
@@ -2265,6 +2265,7 @@ void cayman_fini(struct radeon_device *r
radeon_vm_manager_fini(rdev);
radeon_ib_pool_fini(rdev);
radeon_irq_kms_fini(rdev);
+ r600_uvd_stop(rdev);
radeon_uvd_fini(rdev);
cayman_pcie_gart_fini(rdev);
r600_vram_scratch_fini(rdev);
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2675,12 +2675,29 @@ int r600_uvd_rbc_start(struct radeon_dev
return 0;
}

-void r600_uvd_rbc_stop(struct radeon_device *rdev)
+void r600_uvd_stop(struct radeon_device *rdev)
{
struct radeon_ring *ring = &rdev->ring[R600_RING_TYPE_UVD_INDEX];

/* force RBC into idle state */
WREG32(UVD_RBC_RB_CNTL, 0x11010101);
+
+ /* Stall UMC and register bus before resetting VCPU */
+ WREG32_P(UVD_LMI_CTRL2, 1 << 8, ~(1 << 8));
+ WREG32_P(UVD_RB_ARB_CTRL, 1 << 3, ~(1 << 3));
+ mdelay(1);
+
+ /* put VCPU into reset */
+ WREG32(UVD_SOFT_RESET, VCPU_SOFT_RESET);
+ mdelay(5);
+
+ /* disable VCPU clock */
+ WREG32(UVD_VCPU_CNTL, 0x0);
+
+ /* Unstall UMC and register bus */
+ WREG32_P(UVD_LMI_CTRL2, 0, ~(1 << 8));
+ WREG32_P(UVD_RB_ARB_CTRL, 0, ~(1 << 3));
+
ring->ready = false;
}

@@ -2700,6 +2717,11 @@ int r600_uvd_init(struct radeon_device *
/* disable interupt */
WREG32_P(UVD_MASTINT_EN, 0, ~(1 << 1));

+ /* Stall UMC and register bus before resetting VCPU */
+ WREG32_P(UVD_LMI_CTRL2, 1 << 8, ~(1 << 8));
+ WREG32_P(UVD_RB_ARB_CTRL, 1 << 3, ~(1 << 3));
+ mdelay(1);
+
/* put LMI, VCPU, RBC etc... into reset */
WREG32(UVD_SOFT_RESET, LMI_SOFT_RESET | VCPU_SOFT_RESET |
LBSI_SOFT_RESET | RBC_SOFT_RESET | CSM_SOFT_RESET |
@@ -2729,10 +2751,6 @@ int r600_uvd_init(struct radeon_device *
WREG32(UVD_MPC_SET_ALU, 0);
WREG32(UVD_MPC_SET_MUX, 0x88);

- /* Stall UMC */
- WREG32_P(UVD_LMI_CTRL2, 1 << 8, ~(1 << 8));
- WREG32_P(UVD_RB_ARB_CTRL, 1 << 3, ~(1 << 3));
-
/* take all subblocks out of reset, except VCPU */
WREG32(UVD_SOFT_RESET, VCPU_SOFT_RESET);
mdelay(5);
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -399,7 +399,7 @@ uint64_t r600_get_gpu_clock_counter(stru
/* uvd */
int r600_uvd_init(struct radeon_device *rdev);
int r600_uvd_rbc_start(struct radeon_device *rdev);
-void r600_uvd_rbc_stop(struct radeon_device *rdev);
+void r600_uvd_stop(struct radeon_device *rdev);
int r600_uvd_ib_test(struct radeon_device *rdev, struct radeon_ring *ring);
void r600_uvd_fence_emit(struct radeon_device *rdev,
struct radeon_fence *fence);
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -1983,6 +1983,7 @@ int rv770_resume(struct radeon_device *r
int rv770_suspend(struct radeon_device *rdev)
{
r600_audio_fini(rdev);
+ r600_uvd_stop(rdev);
radeon_uvd_suspend(rdev);
r700_cp_stop(rdev);
r600_dma_stop(rdev);
@@ -2098,6 +2099,7 @@ void rv770_fini(struct radeon_device *rd
radeon_ib_pool_fini(rdev);
radeon_irq_kms_fini(rdev);
rv770_pcie_gart_fini(rdev);
+ r600_uvd_stop(rdev);
radeon_uvd_fini(rdev);
r600_vram_scratch_fini(rdev);
radeon_gem_fini(rdev);
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -5473,7 +5473,7 @@ int si_suspend(struct radeon_device *rde
si_cp_enable(rdev, false);
cayman_dma_stop(rdev);
if (rdev->has_uvd) {
- r600_uvd_rbc_stop(rdev);
+ r600_uvd_stop(rdev);
radeon_uvd_suspend(rdev);
}
si_irq_suspend(rdev);
@@ -5613,8 +5613,10 @@ void si_fini(struct radeon_device *rdev)
radeon_vm_manager_fini(rdev);
radeon_ib_pool_fini(rdev);
radeon_irq_kms_fini(rdev);
- if (rdev->has_uvd)
+ if (rdev->has_uvd) {
+ r600_uvd_stop(rdev);
radeon_uvd_fini(rdev);
+ }
si_pcie_gart_fini(rdev);
r600_vram_scratch_fini(rdev);
radeon_gem_fini(rdev);