From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Thu, 20 Apr 2017 18:41:34 +0000 (-0400)
Subject: drm/radeon: Add module param to control CIK support
X-Git-Tag: v4.13-rc1~45^2~24^2~155
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e7f78b69aba479728865ef3ec4229b372fc79f94;p=platform%2Fkernel%2Flinux-exynos.git

drm/radeon: Add module param to control CIK support

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

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>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index c1c8e22..0a03415 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -116,6 +116,10 @@ extern int radeon_mst;
 extern int radeon_uvd;
 extern int radeon_vce;
 
+#ifdef CONFIG_DRM_AMDGPU_CIK
+extern int radeon_cik_support;
+#endif
+
 /*
  * Copy from radeon_drv.h so we don't have to include both and have conflicting
  * symbol;
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index ef8a759..acb3738 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -295,6 +295,12 @@ module_param_named(uvd, radeon_uvd, int, 0444);
 MODULE_PARM_DESC(vce, "vce enable/disable vce support (1 = enable, 0 = disable)");
 module_param_named(vce, radeon_vce, int, 0444);
 
+#ifdef CONFIG_DRM_AMDGPU_CIK
+int radeon_cik_support = 0;
+MODULE_PARM_DESC(cik_support, "CIK support (1 = enabled, 0 = disabled (default))");
+module_param_named(cik_support, radeon_cik_support, int, 0444);
+#endif
+
 static struct pci_device_id pciidlist[] = {
 	radeon_PCI_IDS
 };
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 6a68d44..f0abba3 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -98,6 +98,24 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
 	struct radeon_device *rdev;
 	int r, acpi_status;
 
+#ifdef CONFIG_DRM_AMDGPU_CIK
+	if (!radeon_cik_support) {
+		switch (flags & RADEON_FAMILY_MASK) {
+		case CHIP_KAVERI:
+		case CHIP_BONAIRE:
+		case CHIP_HAWAII:
+		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"
+				);
+			return -ENODEV;
+		}
+	}
+#endif
+
 	rdev = kzalloc(sizeof(struct radeon_device), GFP_KERNEL);
 	if (rdev == NULL) {
 		return -ENOMEM;