drm/amdgpu/radeon: Use radeon by default for CIK GPUs

Even if CONFIG_DRM_AMDGPU_CIK is enabled.

There is no feature parity yet for CIK, in particular amdgpu doesn't
support HDMI/DisplayPort audio without DC.

v2:
* Clarify the lack of feature parity being related to HDMI/DP audio.
* Fix "SI" typo in DRM_AMDGPU_CIK help entry.
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>

drivers/gpu/drm/amd/amdgpu/Kconfig

@@ -17,11 +17,11 @@ config DRM_AMDGPU_CIK
 	help
 	  Choose this option if you want to enable support for CIK asics.
 
-	  CIK is already supported in radeon. If you enable this option,
-	  support for CIK will be provided by amdgpu and disabled in
-	  radeon by default. Use module options to override this:
+	  CIK is already supported in radeon. Support for CIK in amdgpu
+	  will be disabled by default and is still provided by radeon.
+	  Use module options to override this:
 
-	  radeon.cik_support=1 amdgpu.cik_support=0
+	  radeon.cik_support=0 amdgpu.cik_support=1
 
 config DRM_AMDGPU_USERPTR
 	bool "Always enable userptr write support"

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -249,8 +249,8 @@ module_param_named(si_support, amdgpu_si_support, int, 0444);
 #endif
 
 #ifdef CONFIG_DRM_AMDGPU_CIK
-int amdgpu_cik_support = 1;
-MODULE_PARM_DESC(cik_support, "CIK support (1 = enabled (default), 0 = disabled)");
+int amdgpu_cik_support = 0;
+MODULE_PARM_DESC(cik_support, "CIK support (1 = enabled, 0 = disabled (default))");
 module_param_named(cik_support, amdgpu_cik_support, int, 0444);
 #endif
 

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

@@ -98,7 +98,7 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
 			dev_info(dev->dev,
 				 "SI support provided by radeon.\n");
 			dev_info(dev->dev,
-		"Use radeon.si_support=0 amdgpu.si_support=1 to override.\n"
+				 "Use radeon.si_support=0 amdgpu.si_support=1 to override.\n"
 				);
 			return -ENODEV;
 		}
@@ -113,7 +113,10 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
 		case CHIP_KABINI:
 		case CHIP_MULLINS:
 			dev_info(dev->dev,
-				 "CIK support disabled by module param\n");
+				 "CIK support provided by radeon.\n");
+			dev_info(dev->dev,
+				 "Use radeon.cik_support=0 amdgpu.cik_support=1 to override.\n"
+				);
 			return -ENODEV;
 		}
 	}

drivers/gpu/drm/radeon/radeon_drv.c

@@ -299,8 +299,8 @@ int radeon_si_support = 1;
 MODULE_PARM_DESC(si_support, "SI support (1 = enabled (default), 0 = disabled)");
 module_param_named(si_support, radeon_si_support, int, 0444);
 
-int radeon_cik_support = 0;
-MODULE_PARM_DESC(cik_support, "CIK support (1 = enabled, 0 = disabled (default))");
+int radeon_cik_support = 1;
+MODULE_PARM_DESC(cik_support, "CIK support (1 = enabled (default), 0 = disabled)");
 module_param_named(cik_support, radeon_cik_support, int, 0444);
 
 static struct pci_device_id pciidlist[] = {

drivers/gpu/drm/radeon/radeon_kms.c

@@ -118,10 +118,7 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
 		case CHIP_KABINI:
 		case CHIP_MULLINS:
 			dev_info(dev->dev,
-				 "CIK support provided by amdgpu.\n");
-			dev_info(dev->dev,
-		"Use radeon.cik_support=1 amdgpu.cik_support=0 to override.\n"
-				);
+				 "CIK support disabled by module param\n");
 			return -ENODEV;
 		}
 	}