Bug 1523823. Enable WebRender by default on modern (CIK, VI, GFX9) desktop AMD hardware. r=kats

This should help increase our WebRender usage so we're more likely to learn
about problems with minimal additional risk.

Differential Revision: https://phabricator.services.mozilla.com/D18020

--HG--
extra : moz-landing-system : lando

gfx/thebes/gfxPlatform.cpp

@@ -2657,26 +2657,46 @@ static FeatureState& WebRenderHardwareQualificationStatus(
     } else {
       nsAutoString adapterVendorID;
       gfxInfo->GetAdapterVendorID(adapterVendorID);
-      if (adapterVendorID != u"0x10de") {
+
+      nsAutoString adapterDeviceID;
+      gfxInfo->GetAdapterDeviceID(adapterDeviceID);
+      nsresult valid;
+      int32_t deviceID = adapterDeviceID.ToInteger(&valid, 16);
+      if (valid != NS_OK) {
         featureWebRenderQualified.Disable(
-            FeatureStatus::Blocked, "Not Nvidia",
-            NS_LITERAL_CSTRING("FEATURE_FAILURE_NOT_NVIDIA"));
+            FeatureStatus::Blocked, "Bad device id",
+            NS_LITERAL_CSTRING("FEATURE_FAILURE_BAD_DEVICE_ID"));
       } else {
-        nsAutoString adapterDeviceID;
-        gfxInfo->GetAdapterDeviceID(adapterDeviceID);
-        nsresult valid;
-        int32_t deviceID = adapterDeviceID.ToInteger(&valid, 16);
-        if (valid != NS_OK) {
+        if (adapterVendorID == u"0x10de") {
+          if (deviceID < 0x6c0) {
+            // 0x6c0 is the lowest Fermi device id. Unfortunately some Tesla
+            // devices that don't support D3D 10.1 have higher deviceIDs. They
+            // will be included, but blocked by ANGLE.
+            featureWebRenderQualified.Disable(
+                FeatureStatus::Blocked, "Device too old",
+                NS_LITERAL_CSTRING("FEATURE_FAILURE_DEVICE_TOO_OLD"));
+          }
+#ifdef NIGHTLY_BUILD
+        } else if (adapterVendorID == u"0x1002") {  // AMD
+          // AMD deviceIDs are not very well ordered. This
+          // condition is based off the information in gpu-db
+          if ((deviceID >= 0x6640 && deviceID < 0x6660) ||
+              (deviceID >= 0x67a0 && deviceID < 0x6800) ||
+              (deviceID >= 0x6860 && deviceID < 0x6880) ||
+              (deviceID >= 0x6900 && deviceID < 0x6a00) ||
+              (deviceID == 0x7300) ||
+              (deviceID >= 0x9830 && deviceID < 0x9870)) {
+            // we have a desktop CIK, VI, or GFX9 device
+          } else {
+            featureWebRenderQualified.Disable(
+                FeatureStatus::Blocked, "Device too old",
+                NS_LITERAL_CSTRING("FEATURE_FAILURE_DEVICE_TOO_OLD"));
+          }
+#endif
+        } else {
           featureWebRenderQualified.Disable(
-              FeatureStatus::Blocked, "Bad device id",
-              NS_LITERAL_CSTRING("FEATURE_FAILURE_BAD_DEVICE_ID"));
-        } else if (deviceID < 0x6c0) {
-          // 0x6c0 is the lowest Fermi device id. Unfortunately some Tesla
-          // devices that don't support D3D 10.1 have higher deviceIDs. They
-          // will be included, but blocked by ANGLE.
-          featureWebRenderQualified.Disable(
-              FeatureStatus::Blocked, "Device too old",
-              NS_LITERAL_CSTRING("FEATURE_FAILURE_DEVICE_TOO_OLD"));
+              FeatureStatus::Blocked, "Unsupported vendor",
+              NS_LITERAL_CSTRING("FEATURE_FAILURE_UNSUPPORTED_VENDOR"));
         }
       }
     }