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From 8d05bda47797c02d5c797ca9a81786db7c8c117b Mon Sep 17 00:00:00 2001
From: Jack Xiao <Jack.Xiao@amd.com>
Date: Thu, 10 Jan 2019 15:43:33 +0800
Subject: [PATCH 2217/2940] drm/amdgpu: add mcbp driver parameter
Add mcbp driver parameter, so that mcbp feature can be
enabled/disabled by driver parameter.
Acked-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 5 +++++
3 files changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index cc51bbe212e8..458a6eded228 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -162,6 +162,7 @@ extern struct amdgpu_mgpu_info mgpu_info;
extern int amdgpu_ras_enable;
extern uint amdgpu_ras_mask;
extern int amdgpu_async_gfx_ring;
+extern int amdgpu_mcbp;
#ifdef CONFIG_DRM_AMDGPU_SI
extern int amdgpu_si_support;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 995f31b12a46..bf8d8adc0918 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2563,6 +2563,9 @@ int amdgpu_device_init(struct amdgpu_device *adev,
amdgpu_device_get_pcie_info(adev);
+ if (amdgpu_mcbp)
+ DRM_INFO("MCBP is enabled\n");
+
/* early init functions */
r = amdgpu_device_ip_early_init(adev);
if (r)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 3ac2645b96b6..93afc2f1c5e4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -142,6 +142,7 @@ uint amdgpu_smu_memory_pool_size = 0;
/* FBC (bit 0) disabled by default*/
uint amdgpu_dc_feature_mask = 0;
int amdgpu_async_gfx_ring = 1;
+int amdgpu_mcbp = 0;
struct amdgpu_mgpu_info mgpu_info = {
.mutex = __MUTEX_INITIALIZER(mgpu_info.mutex),
@@ -586,6 +587,10 @@ MODULE_PARM_DESC(async_gfx_ring,
"Asynchronous GFX rings that could be configured with either different priorities (HP3D ring and LP3D ring), or equal priorities (0 = disabled, 1 = enabled (default))");
module_param_named(async_gfx_ring, amdgpu_async_gfx_ring, int, 0444);
+MODULE_PARM_DESC(mcbp,
+ "Enable Mid-command buffer preemption (0 = disabled (default), 1 = enabled)");
+module_param_named(mcbp, amdgpu_mcbp, int, 0444);
+
/**
* DOC: dcfeaturemask (uint)
* Override display features enabled. See enum DC_FEATURE_MASK in drivers/gpu/drm/amd/include/amd_shared.h.
--
2.17.1
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