drm/amdgpu: Add module param to control CIK support

If AMDGPU supports CIK, add a module parameter to control CIK
support. It's on by default in AMDGPU, while it is off by default
in radeon.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Michel Dänzer <michel.daenzer@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 3308e62..8721009 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -115,6 +115,10 @@ extern int amdgpu_param_buf_per_se;
 extern int amdgpu_job_hang_limit;
 extern int amdgpu_lbpw;
 
+#ifdef CONFIG_DRM_AMDGPU_CIK
+extern int amdgpu_cik_support;
+#endif
+
 #define AMDGPU_DEFAULT_GTT_SIZE_MB             3072ULL /* 3GB by default */
 #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 8986778..a1aeac6 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -242,6 +242,13 @@ module_param_named(job_hang_limit, amdgpu_job_hang_limit, int ,0444);
 MODULE_PARM_DESC(lbpw, "Load Balancing Per Watt (LBPW) support (1 = enable, 0 = disable, -1 = auto)");
 module_param_named(lbpw, amdgpu_lbpw, int, 0444);
 
+#ifdef CONFIG_DRM_AMDGPU_CIK
+int amdgpu_cik_support = 1;
+MODULE_PARM_DESC(cik_support, "CIK support (1 = enabled (default), 0 = disabled)");
+module_param_named(cik_support, amdgpu_cik_support, int, 0444);
+#endif
+
+
 static const struct pci_device_id pciidlist[] = {
 #ifdef  CONFIG_DRM_AMDGPU_SI
        {0x1002, 0x6780, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI},

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index cda06a1..e091179 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -87,6 +87,21 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
        struct amdgpu_device *adev;
        int r, acpi_status;
 
+#ifdef CONFIG_DRM_AMDGPU_CIK
+       if (!amdgpu_cik_support) {
+               switch (flags & AMD_ASIC_MASK) {
+               case CHIP_KAVERI:
+               case CHIP_BONAIRE:
+               case CHIP_HAWAII:
+               case CHIP_KABINI:
+               case CHIP_MULLINS:
+                       dev_info(dev->dev,
+                                "CIK support disabled by module param\n");
+                       return -ENODEV;
+               }
+       }
+#endif
+
        adev = kzalloc(sizeof(struct amdgpu_device), GFP_KERNEL);
        if (adev == NULL) {
                return -ENOMEM;