drm/amdgpu: Define one variable for virtual display.
For virtual display feature, define on variable in amdgpu.ko. When want to
enable virtual display feature, need set the option "amdgpu.virtual_display=1".
And then disable vga render and crtc if have DCE engine.
Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 12112cc..54f7156 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -92,6 +92,7 @@
extern unsigned amdgpu_pg_mask;
extern char *amdgpu_disable_cu;
extern int amdgpu_sclk_deep_sleep_en;
+extern int amdgpu_virtual_display;
#define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS 3000
#define AMDGPU_MAX_USEC_TIMEOUT 100000 /* 100 ms */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 44fda31..421dbbf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -90,6 +90,7 @@
unsigned amdgpu_cg_mask = 0xffffffff;
unsigned amdgpu_pg_mask = 0xffffffff;
char *amdgpu_disable_cu = NULL;
+int amdgpu_virtual_display = 0;
MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing, in megabytes");
module_param_named(vramlimit, amdgpu_vram_limit, int, 0600);
@@ -189,6 +190,9 @@
MODULE_PARM_DESC(disable_cu, "Disable CUs (se.sh.cu,...)");
module_param_named(disable_cu, amdgpu_disable_cu, charp, 0444);
+MODULE_PARM_DESC(virtual_display, "enable virtual display (0 = disable virtual display)");
+module_param_named(virtual_display, amdgpu_virtual_display, int, 0444);
+
static const struct pci_device_id pciidlist[] = {
#ifdef CONFIG_DRM_AMDGPU_CIK
/* Kaveri */