amdgpu driver lacks of modeset module option other drm drivers provide
for enforcing or disabling the driver load. Interestingly, the
amdgpu_mode variable declaration is already found in the header file,
but the actual implementation seems to have been forgotten.
This patch adds the missing piece.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index e55792d3cd12..029d95ecd26b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -78,6 +78,7 @@
#define KMS_DRIVER_MINOR 23
#define KMS_DRIVER_PATCHLEVEL 0
+int amdgpu_modeset = -1;
int amdgpu_vram_limit = 0;
int amdgpu_vis_vram_limit = 0;
int amdgpu_gart_size = -1; /* auto */
@@ -130,6 +131,9 @@ int amdgpu_lbpw = -1;
int amdgpu_compute_multipipe = -1;
int amdgpu_gpu_recovery = -1; /* auto */
+MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
+module_param_named(modeset, amdgpu_modeset, int, 0400);
+
MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing, in megabytes");
module_param_named(vramlimit, amdgpu_vram_limit, int, 0600);
@@ -905,10 +909,12 @@ static int __init amdgpu_init(void)
{
int r;
- if (vgacon_text_force()) {
+ if (vgacon_text_force() && amdgpu_modeset == -1) {
DRM_ERROR("VGACON disables amdgpu kernel modesetting.\n");
return -EINVAL;
}
+ if (amdgpu_modeset == 0)
+ return -EINVAL;
r = amdgpu_sync_init();
if (r)
--
2.16.2
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