NAK, that is exactly what we are trying to avoid.
Am 11.12.20 um 01:55 schrieb Darren Salt:
---
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 | 9 +++++++++
3 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index c228e7470d51..2efce7fa6a4b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -201,6 +201,7 @@ static const bool __maybe_unused no_system_mem_limit;
extern int amdgpu_tmz;
extern int amdgpu_reset_method;
+extern bool amdgpu_resize_bar;
#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 1e99ca62a4d2..292796e9f83d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1115,6 +1115,9 @@ int amdgpu_device_resize_fb_bar(struct amdgpu_device
*adev)
int r;
bool nospc = false;
+ if (!amdgpu_resize_bar)
+ return 0;
+
/* Bypass for VF */
if (amdgpu_sriov_vf(adev))
return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index cac2724e7615..6df33df74775 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -161,6 +161,7 @@ int amdgpu_force_asic_type = -1;
int amdgpu_tmz;
int amdgpu_reset_method = -1; /* auto */
int amdgpu_num_kcq = -1;
+bool amdgpu_resize_bar = true;
struct amdgpu_mgpu_info mgpu_info = {
.mutex = __MUTEX_INITIALIZER(mgpu_info.mutex),
@@ -807,6 +808,14 @@ module_param_named(bad_page_threshold,
amdgpu_bad_page_threshold, int, 0444);
MODULE_PARM_DESC(num_kcq, "number of kernel compute queue user want to setup (8 if
set to greater than 8 or less than 0, only affect gfx 8+)");
module_param_named(num_kcq, amdgpu_num_kcq, int, 0444);
+/**
+ * DOC: resize_bar (bool)
+ * Control whether FB BAR should be resized.
+ * Enabled by default.
+ */
+module_param_named(resize_bar, amdgpu_resize_bar, bool, 0444);
+MODULE_PARM_DESC(resize_bar, "Controls whether the FB BAR should be resized
(default = true).");
+
static const struct pci_device_id pciidlist[] = {
#ifdef CONFIG_DRM_AMDGPU_SI
{0x1002, 0x6780, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI},
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