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drm/amd/amdgpu: add vce3.0 clock gating support. (v2)
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v2: fix grbm locking

Reviewed-by: Alex Deucher <[email protected]>
Reviewed-by: Christian König <[email protected]>
Acked-by: Jammy Zhou <[email protected]>
Signed-off-by: Eric Huang <[email protected]>
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@erichuang22 @alexdeucher
erichuang22 authored and alexdeucher committed Dec 21, 2015
1 parent 9b08a30 commit 0689a57
Showing 1 changed file with 148 additions and 1 deletion.
149 changes: 148 additions & 1 deletion drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
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Original file line number Diff line number Diff line change
Expand Up @@ -103,6 +103,108 @@ static void vce_v3_0_ring_set_wptr(struct amdgpu_ring *ring)
WREG32(mmVCE_RB_WPTR2, ring->wptr);
}

static void vce_v3_0_override_vce_clock_gating(struct amdgpu_device *adev, bool override)
{
u32 tmp, data;

tmp = data = RREG32(mmVCE_RB_ARB_CTRL);
if (override)
data |= VCE_RB_ARB_CTRL__VCE_CGTT_OVERRIDE_MASK;
else
data &= ~VCE_RB_ARB_CTRL__VCE_CGTT_OVERRIDE_MASK;

if (tmp != data)
WREG32(mmVCE_RB_ARB_CTRL, data);
}

static void vce_v3_0_set_vce_sw_clock_gating(struct amdgpu_device *adev,
bool gated)
{
u32 tmp, data;
/* Set Override to disable Clock Gating */
vce_v3_0_override_vce_clock_gating(adev, true);

if (!gated) {
/* Force CLOCK ON for VCE_CLOCK_GATING_B,
* {*_FORCE_ON, *_FORCE_OFF} = {1, 0}
* VREG can be FORCE ON or set to Dynamic, but can't be OFF
*/
tmp = data = RREG32(mmVCE_CLOCK_GATING_B);
data |= 0x1ff;
data &= ~0xef0000;
if (tmp != data)
WREG32(mmVCE_CLOCK_GATING_B, data);

/* Force CLOCK ON for VCE_UENC_CLOCK_GATING,
* {*_FORCE_ON, *_FORCE_OFF} = {1, 0}
*/
tmp = data = RREG32(mmVCE_UENC_CLOCK_GATING);
data |= 0x3ff000;
data &= ~0xffc00000;
if (tmp != data)
WREG32(mmVCE_UENC_CLOCK_GATING, data);

/* set VCE_UENC_CLOCK_GATING_2 */
tmp = data = RREG32(mmVCE_UENC_CLOCK_GATING_2);
data |= 0x2;
data &= ~0x2;
if (tmp != data)
WREG32(mmVCE_UENC_CLOCK_GATING_2, data);

/* Force CLOCK ON for VCE_UENC_REG_CLOCK_GATING */
tmp = data = RREG32(mmVCE_UENC_REG_CLOCK_GATING);
data |= 0x37f;
if (tmp != data)
WREG32(mmVCE_UENC_REG_CLOCK_GATING, data);

/* Force VCE_UENC_DMA_DCLK_CTRL Clock ON */
tmp = data = RREG32(mmVCE_UENC_DMA_DCLK_CTRL);
data |= VCE_UENC_DMA_DCLK_CTRL__WRDMCLK_FORCEON_MASK |
VCE_UENC_DMA_DCLK_CTRL__RDDMCLK_FORCEON_MASK |
VCE_UENC_DMA_DCLK_CTRL__REGCLK_FORCEON_MASK |
0x8;
if (tmp != data)
WREG32(mmVCE_UENC_DMA_DCLK_CTRL, data);
} else {
/* Force CLOCK OFF for VCE_CLOCK_GATING_B,
* {*, *_FORCE_OFF} = {*, 1}
* set VREG to Dynamic, as it can't be OFF
*/
tmp = data = RREG32(mmVCE_CLOCK_GATING_B);
data &= ~0x80010;
data |= 0xe70008;
if (tmp != data)
WREG32(mmVCE_CLOCK_GATING_B, data);
/* Force CLOCK OFF for VCE_UENC_CLOCK_GATING,
* Force ClOCK OFF takes precedent over Force CLOCK ON setting.
* {*_FORCE_ON, *_FORCE_OFF} = {*, 1}
*/
tmp = data = RREG32(mmVCE_UENC_CLOCK_GATING);
data |= 0xffc00000;
if (tmp != data)
WREG32(mmVCE_UENC_CLOCK_GATING, data);
/* Set VCE_UENC_CLOCK_GATING_2 */
tmp = data = RREG32(mmVCE_UENC_CLOCK_GATING_2);
data |= 0x10000;
if (tmp != data)
WREG32(mmVCE_UENC_CLOCK_GATING_2, data);
/* Set VCE_UENC_REG_CLOCK_GATING to dynamic */
tmp = data = RREG32(mmVCE_UENC_REG_CLOCK_GATING);
data &= ~0xffc00000;
if (tmp != data)
WREG32(mmVCE_UENC_REG_CLOCK_GATING, data);
/* Set VCE_UENC_DMA_DCLK_CTRL CG always in dynamic mode */
tmp = data = RREG32(mmVCE_UENC_DMA_DCLK_CTRL);
data &= ~(VCE_UENC_DMA_DCLK_CTRL__WRDMCLK_FORCEON_MASK |
VCE_UENC_DMA_DCLK_CTRL__RDDMCLK_FORCEON_MASK |
VCE_UENC_DMA_DCLK_CTRL__REGCLK_FORCEON_MASK |
0x8);
if (tmp != data)
WREG32(mmVCE_UENC_DMA_DCLK_CTRL, data);
}
vce_v3_0_override_vce_clock_gating(adev, false);
}

/**
* vce_v3_0_start - start VCE block
*
Expand All @@ -121,7 +223,7 @@ static int vce_v3_0_start(struct amdgpu_device *adev)
if (adev->vce.harvest_config & (1 << idx))
continue;

if(idx == 0)
if (idx == 0)
WREG32_P(mmGRBM_GFX_INDEX, 0,
~GRBM_GFX_INDEX__VCE_INSTANCE_MASK);
else
Expand Down Expand Up @@ -174,6 +276,10 @@ static int vce_v3_0_start(struct amdgpu_device *adev)
/* clear BUSY flag */
WREG32_P(mmVCE_STATUS, 0, ~1);

/* Set Clock-Gating off */
if (adev->cg_flags & AMDGPU_CG_SUPPORT_VCE_MGCG)
vce_v3_0_set_vce_sw_clock_gating(adev, false);

if (r) {
DRM_ERROR("VCE not responding, giving up!!!\n");
mutex_unlock(&adev->grbm_idx_mutex);
Expand Down Expand Up @@ -609,6 +715,47 @@ static int vce_v3_0_process_interrupt(struct amdgpu_device *adev,
static int vce_v3_0_set_clockgating_state(void *handle,
enum amd_clockgating_state state)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
bool enable = (state == AMD_CG_STATE_GATE) ? true : false;
int i;

if (!(adev->cg_flags & AMDGPU_CG_SUPPORT_VCE_MGCG))
return 0;

mutex_lock(&adev->grbm_idx_mutex);
for (i = 0; i < 2; i++) {
/* Program VCE Instance 0 or 1 if not harvested */
if (adev->vce.harvest_config & (1 << i))
continue;

if (i == 0)
WREG32_P(mmGRBM_GFX_INDEX, 0,
~GRBM_GFX_INDEX__VCE_INSTANCE_MASK);
else
WREG32_P(mmGRBM_GFX_INDEX,
GRBM_GFX_INDEX__VCE_INSTANCE_MASK,
~GRBM_GFX_INDEX__VCE_INSTANCE_MASK);

if (enable) {
/* initialize VCE_CLOCK_GATING_A: Clock ON/OFF delay */
uint32_t data = RREG32(mmVCE_CLOCK_GATING_A);
data &= ~(0xf | 0xff0);
data |= ((0x0 << 0) | (0x04 << 4));
WREG32(mmVCE_CLOCK_GATING_A, data);

/* initialize VCE_UENC_CLOCK_GATING: Clock ON/OFF delay */
data = RREG32(mmVCE_UENC_CLOCK_GATING);
data &= ~(0xf | 0xff0);
data |= ((0x0 << 0) | (0x04 << 4));
WREG32(mmVCE_UENC_CLOCK_GATING, data);
}

vce_v3_0_set_vce_sw_clock_gating(adev, enable);
}

WREG32_P(mmGRBM_GFX_INDEX, 0, ~GRBM_GFX_INDEX__VCE_INSTANCE_MASK);
mutex_unlock(&adev->grbm_idx_mutex);

return 0;
}

Expand Down

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