Enable V4L2 VDA for cast devices

BUG=1032907
TEST=manual
R=kbr@chromium.org

Change-Id: Ib55c09a71093b10d55fd31daf49f090da81cf6d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1975089
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726958}

gpu/config/BUILD.gn

@@ -186,6 +186,7 @@ jumbo_source_set("config_sources") {
     ":process_json",
     "//base",
     "//build:branding_buildflags",
+    "//build:chromecast_buildflags",
     "//gpu/ipc/common:gpu_preferences_interface",
     "//gpu/vulkan:buildflags",
     "//media:media_buildflags",

gpu/config/gpu_info_collector_linux.cc

@@ -3,6 +3,8 @@
 // found in the LICENSE file.
 
 #include "base/trace_event/trace_event.h"
+#include "build/build_config.h"
+#include "build/chromecast_buildflags.h"
 #include "gpu/config/gpu_info_collector.h"
 #include "third_party/angle/src/gpu_info_util/SystemInfo.h"
 
@@ -13,6 +15,13 @@ bool CollectContextGraphicsInfo(GPUInfo* gpu_info) {
 
   TRACE_EVENT0("gpu", "gpu_info_collector::CollectGraphicsInfo");
 
+#if BUILDFLAG(IS_CHROMECAST)
+  // Chromecast doesn't go through CollectBasicGraphicsInfo() step, so
+  // this is the only place we need to set machine model.
+  // TODO(zmo): maybe distinguish different Chromecast products.
+  gpu_info->machine_model_name = "Chromecast";
+#endif  // IS_CHROMECAST
+
   return CollectGraphicsInfoGL(gpu_info);
 }
 

gpu/config/process_json.py

@@ -265,6 +265,7 @@ def write_machine_model_info(entry_id, is_exception, exception_id,
                              data_file, data_helper_file):
   model_name_var_name = None
   if machine_model_name:
+    assert isinstance(machine_model_name, list)
     model_name_var_name = 'kMachineModelNameForEntry' + str(entry_id)
     if is_exception:
       model_name_var_name += 'Exception' + str(exception_id)

gpu/config/software_rendering_list.json

@@ -335,10 +335,15 @@
     {
       "id": 48,
       "description": "Accelerated video decode is unavailable on Linux",
-      "cr_bugs": [137247],
+      "cr_bugs": [137247, 1032907],
       "os": {
         "type": "linux"
       },
+      "exceptions": [
+        {
+          "machine_model_name": ["Chromecast"]
+        }
+      ],
       "features": [
         "accelerated_video_decode"
       ]