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From 6c60ff572e597d92dd0008ee7d910c787fe7c825 Mon Sep 17 00:00:00 2001
From: Rex Zhu <Rex.Zhu@amd.com>
Date: Mon, 30 Jul 2018 16:59:09 +0800
Subject: [PATCH 0015/2940] 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 <Hawking.Zhang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
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 447c4c7a36d6..47fbe8f54036 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -950,6 +950,10 @@ 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);
@@ -1774,6 +1778,7 @@ 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 ca31ab43715a..4e4eecfe71bd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2367,6 +2367,7 @@ 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);
@@ -2394,6 +2395,7 @@ 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 239bf2a4b3c6..1cdb26471a03 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);
+}
--
2.17.1
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