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drm/amdgpu: Add runtime VCN PG support 

Enable support for dynamically powering up/down VCN on demand.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.1
Rex Zhu 2018-05-16 20:18:22 +08:00 committed by Alex Deucher
parent 61c8e90d96
commit 22cc6c5e19
2 changed files with 30 additions and 18 deletions
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16
drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
View File

@ -212,11 +212,11 @@ static void amdgpu_vcn_idle_work_handler(struct work_struct *work)
}
if (fences == 0) {
if (adev->pm.dpm_enabled) {
/* might be used when with pg/cg
if (adev->pm.dpm_enabled)
amdgpu_dpm_enable_uvd(adev, false);
*/
}
else
amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN,
AMD_PG_STATE_GATE);
} else {
schedule_delayed_work(&adev->vcn.idle_work, VCN_IDLE_TIMEOUT);
}
@ -228,9 +228,11 @@ void amdgpu_vcn_ring_begin_use(struct amdgpu_ring *ring)
bool set_clocks = !cancel_delayed_work_sync(&adev->vcn.idle_work);
if (set_clocks && adev->pm.dpm_enabled) {
/* might be used when with pg/cg
amdgpu_dpm_enable_uvd(adev, true);
*/
if (adev->pm.dpm_enabled)
amdgpu_dpm_enable_uvd(adev, true);
else
amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCN,
AMD_PG_STATE_UNGATE);
}
}

32
drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
View File

@ -35,7 +35,6 @@
#include "mmhub/mmhub_9_1_offset.h"
#include "mmhub/mmhub_9_1_sh_mask.h"
static int vcn_v1_0_start(struct amdgpu_device *adev);
static int vcn_v1_0_stop(struct amdgpu_device *adev);
static void vcn_v1_0_set_dec_ring_funcs(struct amdgpu_device *adev);
static void vcn_v1_0_set_enc_ring_funcs(struct amdgpu_device *adev);
@ -146,10 +145,6 @@ static int vcn_v1_0_hw_init(void *handle)
struct amdgpu_ring *ring = &adev->vcn.ring_dec;
int i, r;
r = vcn_v1_0_start(adev);
if (r)
goto done;
ring->ready = true;
r = amdgpu_ring_test_ring(ring);
if (r) {
@ -185,11 +180,9 @@ static int vcn_v1_0_hw_fini(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
struct amdgpu_ring *ring = &adev->vcn.ring_dec;
int r;
r = vcn_v1_0_stop(adev);
if (r)
return r;
if (RREG32_SOC15(VCN, 0, mmUVD_STATUS))
vcn_v1_0_stop(adev);
ring->ready = false;
@ -769,7 +762,7 @@ static int vcn_v1_0_stop(struct amdgpu_device *adev)
WREG32_P(SOC15_REG_OFFSET(UVD, 0, mmUVD_LMI_CTRL2), 0,
~UVD_LMI_CTRL2__STALL_ARB_UMC_MASK);
/* enable clock gating */
WREG32_SOC15(VCN, 0, mmUVD_STATUS, 0);
vcn_v1_0_enable_clock_gating(adev);
vcn_1_0_enable_static_power_gating(adev);
@ -1179,6 +1172,23 @@ static void vcn_v1_0_dec_ring_insert_nop(struct amdgpu_ring *ring, uint32_t coun
}
}
static int vcn_v1_0_set_powergating_state(void *handle,
enum amd_powergating_state state)
{
/* This doesn't actually powergate the VCN block.
* That's done in the dpm code via the SMC. This
* just re-inits the block as necessary. The actual
* gating still happens in the dpm code. We should
* revisit this when there is a cleaner line between
* the smc and the hw blocks
*/
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
if (state == AMD_PG_STATE_GATE)
return vcn_v1_0_stop(adev);
else
return vcn_v1_0_start(adev);
}
static const struct amd_ip_funcs vcn_v1_0_ip_funcs = {
.name = "vcn_v1_0",
@ -1197,7 +1207,7 @@ static const struct amd_ip_funcs vcn_v1_0_ip_funcs = {
.soft_reset = NULL /* vcn_v1_0_soft_reset */,
.post_soft_reset = NULL /* vcn_v1_0_post_soft_reset */,
.set_clockgating_state = vcn_v1_0_set_clockgating_state,
.set_powergating_state = NULL /* vcn_v1_0_set_powergating_state */,
.set_powergating_state = vcn_v1_0_set_powergating_state,
};
static const struct amdgpu_ring_funcs vcn_v1_0_dec_ring_vm_funcs = {