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

[Tianci Yin]

From: "Tianci.Yin" <tianci.yin at amd.com>

The blockchain SKU has no display support, so the DCN ip
block should be disabled. Add DID/RID as display
supporting dependence, it potentially disable DCN block.

Change-Id: Ia83bef1499708dfd0113fe2dbb3eb4143452c1cd
Signed-off-by: Tianci.Yin <tianci.yin at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h         |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c  | 20 +++++++++++++++++---
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c     |  2 +-
 4 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index f8f3e375c93e..04e906386b5b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1051,7 +1051,7 @@ 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_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..fa522cffdd64 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2958,11 +2958,12 @@ static void amdgpu_device_detect_sriov_bios(struct amdgpu_device *adev)
  * amdgpu_device_asic_has_dc_support - determine if DC supports the asic
  *
  * @asic_type: AMD asic type
+ * @pdev: pointer of 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)
@@ -2998,7 +2999,6 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 	case CHIP_VEGA20:
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	case CHIP_RAVEN:
-	case CHIP_NAVI10:
 	case CHIP_NAVI14:
 	case CHIP_NAVI12:
 	case CHIP_RENOIR:
@@ -3011,6 +3011,20 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 #endif
 		return amdgpu_dc != 0;
 #endif
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	case CHIP_NAVI10:
+		if (pdev->device == 0x731E &&
+		    (pdev->revision == 0xC6 ||
+		     pdev->revision == 0xC7)) {
+			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;
+		} else {
+			return amdgpu_dc != 0;
+		}
+#endif
+
 	default:
 		if (amdgpu_dc > 0)
 			DRM_INFO("Display Core has been requested via kernel parameter "
@@ -3031,7 +3045,7 @@ 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