From 1e317b99f0c244bd8830918fdae9715210baf4fe Mon Sep 17 00:00:00 2001 From: Rex Zhu Date: Fri, 27 Jul 2018 21:06:30 +0800 Subject: [PATCH] drm/amdgpu: Put enable gfx off feature to a delay thread delay to enable gfx off feature to avoid gfx on/off frequently suggested by Alex and Evan. Reviewed-by: Hawking Zhang Reviewed-by: Felix Kuehling Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 15 +++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 8 ++++++-- 3 files changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 47fbe8f..6a8ed9b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -954,6 +954,8 @@ struct amdgpu_gfx { bool gfx_off_state; /* true: enabled, false: disabled */ struct mutex gfx_off_mutex; uint32_t gfx_off_req_count; /* default 1, enable gfx off: dec 1, disable gfx off: add 1 */ + struct delayed_work gfx_off_delay_work; + /* pipe reservation */ struct mutex pipe_reserve_mutex; DECLARE_BITMAP (pipe_reserve_bitmap, AMDGPU_MAX_COMPUTE_QUEUES); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 2068b7f..82bc329 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -1925,6 +1925,19 @@ static void amdgpu_device_ip_late_init_func_handler(struct work_struct *work) DRM_ERROR("ib ring test failed (%d).\n", r); } +static void amdgpu_device_delay_enable_gfx_off(struct work_struct *work) +{ + struct amdgpu_device *adev = + container_of(work, struct amdgpu_device, gfx.gfx_off_delay_work.work); + + mutex_lock(&adev->gfx.gfx_off_mutex); + if (!adev->gfx.gfx_off_state && !adev->gfx.gfx_off_req_count) { + if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, true)) + adev->gfx.gfx_off_state = true; + } + mutex_unlock(&adev->gfx.gfx_off_mutex); +} + /** * amdgpu_device_ip_suspend_phase1 - run suspend for hardware IPs (phase 1) * @@ -2394,6 +2407,8 @@ int amdgpu_device_init(struct amdgpu_device *adev, INIT_DELAYED_WORK(&adev->late_init_work, amdgpu_device_ip_late_init_func_handler); + INIT_DELAYED_WORK(&adev->gfx.gfx_off_delay_work, + amdgpu_device_delay_enable_gfx_off); adev->gfx.gfx_off_req_count = 1; adev->pm.ac_power = power_supply_is_system_supplied() > 0 ? true : false; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c index 1cdb264..11d4d9f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c @@ -26,6 +26,9 @@ #include "amdgpu.h" #include "amdgpu_gfx.h" +/* 0.5 second timeout */ +#define GFX_OFF_DELAY_ENABLE msecs_to_jiffies(500) + /* * GPU scratch registers helpers function. */ @@ -360,6 +363,7 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable) if (!adev->powerplay.pp_funcs->set_powergating_by_smu) return; + mutex_lock(&adev->gfx.gfx_off_mutex); if (!enable) @@ -368,11 +372,11 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable) adev->gfx.gfx_off_req_count--; if (enable && !adev->gfx.gfx_off_state && !adev->gfx.gfx_off_req_count) { - if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, true)) - adev->gfx.gfx_off_state = true; + schedule_delayed_work(&adev->gfx.gfx_off_delay_work, GFX_OFF_DELAY_ENABLE); } else if (!enable && adev->gfx.gfx_off_state) { if (!amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, false)) adev->gfx.gfx_off_state = false; } + mutex_unlock(&adev->gfx.gfx_off_mutex); } -- 2.7.4