[PATCH 2/3] drm/amdgpu: disable DCN for navi10 blockchain SKU

[Tianci Yin <tianci.yin@xxxxxxx>]

From: "Tianci.Yin" <tianci.yin@xxxxxxx>

The blockchain SKU has no display support, remove it.

Change-Id: Ia83bef1499708dfd0113fe2dbb3eb4143452c1cd
Reviewed-by: Guchun Chen <guchun.chen@xxxxxxx>
Signed-off-by: Tianci.Yin <tianci.yin@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h         |  3 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c  | 28 +++++++++++++++++++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c     |  2 +-
 4 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index f8f3e375c93e..3c63fb8904de 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1051,7 +1051,8 @@ void amdgpu_device_indirect_wreg64(struct amdgpu_device *adev,
 				   u32 pcie_index, u32 pcie_data,
 				   u32 reg_addr, u64 reg_data);
 
-bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type);
+bool amdgpu_device_asic_is_blockchain_sku(struct pci_dev *pdev);
+bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type, struct pci_dev *pdev);
 bool amdgpu_device_has_dc_support(struct amdgpu_device *adev);
 
 int emu_soc_asic_init(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index c567f20b9d1f..5dd05e72ed9e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2954,15 +2954,32 @@ static void amdgpu_device_detect_sriov_bios(struct amdgpu_device *adev)
 	}
 }
 
+/**
+ * amdgpu_device_asic_is_blockchain_sku - determine if the asic is blockchain
+ * SKU
+ *
+ * @pdev: pointer to pci_dev instance
+ *
+ * returns true if the asic is blockchain SKU, false if not.
+ */
+bool amdgpu_device_asic_is_blockchain_sku(struct pci_dev *pdev)
+{
+	if (pdev->device == 0x731E &&
+	    (pdev->revision == 0xC6 || pdev->revision == 0xC7))
+		return true;
+	return false;
+}
+
 /**
  * amdgpu_device_asic_has_dc_support - determine if DC supports the asic
  *
  * @asic_type: AMD asic type
+ * @pdev: pointer to pci_dev instance
  *
  * Check if there is DC (new modesetting infrastructre) support for an asic.
  * returns true if DC has support, false if not.
  */
-bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
+bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type, struct pci_dev *pdev)
 {
 	switch (asic_type) {
 #if defined(CONFIG_DRM_AMD_DC)
@@ -2999,6 +3016,13 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	case CHIP_RAVEN:
 	case CHIP_NAVI10:
+		if (amdgpu_device_asic_is_blockchain_sku(pdev)) {
+			DRM_INFO("(%s 0x%04X:0x%04X 0x%04X:0x%04X 0x%02X) has no dc support.\n",
+				 amdgpu_asic_name[asic_type], pdev->vendor, pdev->device,
+				 pdev->subsystem_vendor, pdev->subsystem_device, pdev->revision);
+			return false;
+		}
+		return amdgpu_dc != 0;
 	case CHIP_NAVI14:
 	case CHIP_NAVI12:
 	case CHIP_RENOIR:
@@ -3031,7 +3055,7 @@ bool amdgpu_device_has_dc_support(struct amdgpu_device *adev)
 	if (amdgpu_sriov_vf(adev) || adev->enable_virtual_display)
 		return false;
 
-	return amdgpu_device_asic_has_dc_support(adev->asic_type);
+	return amdgpu_device_asic_has_dc_support(adev->asic_type, adev->pdev);
 }
 
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 9e92d2a070ac..97014458d7de 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -516,7 +516,7 @@ uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev,
 	 */
 	if ((bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) &&
 	    amdgpu_bo_support_uswc(bo_flags) &&
-	    amdgpu_device_asic_has_dc_support(adev->asic_type)) {
+	    amdgpu_device_asic_has_dc_support(adev->asic_type, adev->pdev)) {
 		switch (adev->asic_type) {
 		case CHIP_CARRIZO:
 		case CHIP_STONEY:
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 13723914fa9f..97fda825e0d3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1109,7 +1109,7 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 	bool supports_atomic = false;
 
 	if (!amdgpu_virtual_display &&
-	    amdgpu_device_asic_has_dc_support(flags & AMD_ASIC_MASK))
+	    amdgpu_device_asic_has_dc_support(flags & AMD_ASIC_MASK, pdev))
 		supports_atomic = true;
 
 	if ((flags & AMD_EXP_HW_SUPPORT) && !amdgpu_exp_hw_support) {
-- 
2.17.1

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