From ae46fd8a5981824155d3ddde3b1457cca60a9af8 Mon Sep 17 00:00:00 2001 From: Rex Zhu Date: Mon, 30 Jul 2018 16:59:09 +0800 Subject: [PATCH 5071/5725] drm/amdgpu: Add amdgpu_gfx_off_ctrl function v2: 1. drop the special handling for the hw IP suggested by hawking and Christian. 2. refine the variable name suggested by Flora. This funciton as the entry of gfx off feature. we arbitrat gfx off feature enable/disable in this function. 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 | 5 +++++ drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 36 ++++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index a6bde13..d13ddd2 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -973,6 +973,10 @@ struct amdgpu_gfx { /* NGG */ struct amdgpu_ngg ngg; + /* gfx off */ + 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 */ /* pipe reservation */ struct mutex pipe_reserve_mutex; DECLARE_BITMAP (pipe_reserve_bitmap, AMDGPU_MAX_COMPUTE_QUEUES); @@ -1841,6 +1845,7 @@ void amdgpu_device_program_register_sequence(struct amdgpu_device *adev, const u32 array_size); bool amdgpu_device_is_px(struct drm_device *dev); +void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable); /* atpx handler */ #if defined(CONFIG_VGA_SWITCHEROO) void amdgpu_register_atpx_handler(void); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 4bc4c4a..dd34f4c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -2416,6 +2416,7 @@ int amdgpu_device_init(struct amdgpu_device *adev, mutex_init(&adev->gfx.gpu_clock_mutex); mutex_init(&adev->srbm_mutex); mutex_init(&adev->gfx.pipe_reserve_mutex); + mutex_init(&adev->gfx.gfx_off_mutex); mutex_init(&adev->grbm_idx_mutex); mutex_init(&adev->mn_lock); mutex_init(&adev->virt.vf_errors.lock); @@ -2443,6 +2444,7 @@ int amdgpu_device_init(struct amdgpu_device *adev, INIT_DELAYED_WORK(&adev->late_init_work, amdgpu_device_ip_late_init_func_handler); + adev->gfx.gfx_off_req_count = 1; adev->pm.ac_power = power_supply_is_system_supplied() > 0 ? true : false; /* Registers mapping */ diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c index 3116e4d..fe87ffd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c @@ -340,3 +340,39 @@ void amdgpu_gfx_compute_mqd_sw_fini(struct amdgpu_device *adev) &ring->mqd_gpu_addr, &ring->mqd_ptr); } + +/* amdgpu_gfx_off_ctrl - Handle gfx off feature enable/disable + * + * @adev: amdgpu_device pointer + * @bool enable true: enable gfx off feature, false: disable gfx off feature + * + * 1. gfx off feature will be enabled by gfx ip after gfx cg gp enabled. + * 2. other client can send request to disable gfx off feature, the request should be honored. + * 3. other client can cancel their request of disable gfx off feature + * 4. other client should not send request to enable gfx off feature before disable gfx off feature. + */ + +void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable) +{ + if (!(adev->powerplay.pp_feature & PP_GFXOFF_MASK)) + return; + + if (!adev->powerplay.pp_funcs->set_powergating_by_smu) + return; + + mutex_lock(&adev->gfx.gfx_off_mutex); + + if (!enable) + adev->gfx.gfx_off_req_count++; + else if (adev->gfx.gfx_off_req_count > 0) + 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; + } 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