SF: Generalize display management
This CL enables SF to manage an arbitrary number of physical displays.
Previously, displays were identified by 32-bit IDs, where 0 is the
internal display, 1 is the external display, [2, INT32_MAX] are HWC
virtual displays, and -1 represents an invalid display or a non-HWC
virtual display.
If the HWC provides display identification data, SF now allocates 64-bit
display IDs for physical and HWC virtual displays. The IDs are expressed
using an option type, where the null value represents an invalid display
or non-HWC virtual display. Without HWC support, SF falls back to legacy
behavior with at most two physical displays.
The dynamic display IDs are translated to the legacy constants at the
SF/DMS boundary, as a stopgap until the framework is generalized.
Bug: 74619554
Test: Connect 3 displays and create virtual displays on HWC 2.2 and 2.3
Test: libsurfaceflinger_unittest
Test: SurfaceFlinger_test
Change-Id: I0a4a57b6ab7de2dbcf719a4eb1a19a133694012e
diff --git a/services/surfaceflinger/tests/unittests/DisplayIdentificationTest.cpp b/services/surfaceflinger/tests/unittests/DisplayIdentificationTest.cpp
index 4f1c99e..55995d0 100644
--- a/services/surfaceflinger/tests/unittests/DisplayIdentificationTest.cpp
+++ b/services/surfaceflinger/tests/unittests/DisplayIdentificationTest.cpp
@@ -68,32 +68,44 @@
} // namespace
+const DisplayIdentificationData& getInternalEdid() {
+ static const DisplayIdentificationData data = asDisplayIdentificationData(kInternalEdid);
+ return data;
+}
+
+const DisplayIdentificationData& getExternalEdid() {
+ static const DisplayIdentificationData data = asDisplayIdentificationData(kExternalEdid);
+ return data;
+}
+
+const DisplayIdentificationData& getExternalEedid() {
+ static const DisplayIdentificationData data = asDisplayIdentificationData(kExternalEedid);
+ return data;
+}
+
TEST(DisplayIdentificationTest, isEdid) {
EXPECT_FALSE(isEdid({}));
- EXPECT_TRUE(isEdid(asDisplayIdentificationData(kInternalEdid)));
- EXPECT_TRUE(isEdid(asDisplayIdentificationData(kExternalEdid)));
- EXPECT_TRUE(isEdid(asDisplayIdentificationData(kExternalEedid)));
+ EXPECT_TRUE(isEdid(getInternalEdid()));
+ EXPECT_TRUE(isEdid(getExternalEdid()));
+ EXPECT_TRUE(isEdid(getExternalEedid()));
}
TEST(DisplayIdentificationTest, parseEdid) {
- auto data = asDisplayIdentificationData(kInternalEdid);
- auto edid = parseEdid(data);
+ auto edid = parseEdid(getInternalEdid());
ASSERT_TRUE(edid);
EXPECT_EQ(0x4ca3u, edid->manufacturerId);
EXPECT_STREQ("SEC", edid->pnpId.data());
// ASCII text should be used as fallback if display name and serial number are missing.
EXPECT_EQ("121AT11-801", edid->displayName);
- data = asDisplayIdentificationData(kExternalEdid);
- edid = parseEdid(data);
+ edid = parseEdid(getExternalEdid());
ASSERT_TRUE(edid);
EXPECT_EQ(0x22f0u, edid->manufacturerId);
EXPECT_STREQ("HWP", edid->pnpId.data());
EXPECT_EQ("HP ZR30w", edid->displayName);
- data = asDisplayIdentificationData(kExternalEedid);
- edid = parseEdid(data);
+ edid = parseEdid(getExternalEedid());
ASSERT_TRUE(edid);
EXPECT_EQ(0x4c2du, edid->manufacturerId);
EXPECT_STREQ("SAM", edid->pnpId.data());
@@ -105,7 +117,7 @@
EXPECT_FALSE(parseEdid({}));
// Display name must be printable.
- auto data = asDisplayIdentificationData(kExternalEdid);
+ auto data = getExternalEdid();
data[97] = '\x1b';
auto edid = parseEdid(data);
ASSERT_TRUE(edid);
@@ -128,20 +140,32 @@
EXPECT_STREQ("SAM", getPnpId(0x4c2du).value_or(PnpId{}).data());
}
-TEST(DisplayIdentificationTest, generateDisplayId) {
- const auto primaryId = generateDisplayId(0, asDisplayIdentificationData(kInternalEdid));
- ASSERT_TRUE(primaryId);
+TEST(DisplayIdentificationTest, parseDisplayIdentificationData) {
+ const auto primaryInfo = parseDisplayIdentificationData(0, getInternalEdid());
+ ASSERT_TRUE(primaryInfo);
- const auto secondaryId = generateDisplayId(1, asDisplayIdentificationData(kExternalEdid));
- ASSERT_TRUE(secondaryId);
+ const auto secondaryInfo = parseDisplayIdentificationData(1, getExternalEdid());
+ ASSERT_TRUE(secondaryInfo);
- const auto tertiaryId = generateDisplayId(2, asDisplayIdentificationData(kExternalEedid));
- ASSERT_TRUE(tertiaryId);
+ const auto tertiaryInfo = parseDisplayIdentificationData(2, getExternalEedid());
+ ASSERT_TRUE(tertiaryInfo);
// Display IDs should be unique.
- EXPECT_NE(primaryId, secondaryId);
- EXPECT_NE(primaryId, tertiaryId);
- EXPECT_NE(secondaryId, tertiaryId);
+ EXPECT_NE(primaryInfo->id, secondaryInfo->id);
+ EXPECT_NE(primaryInfo->id, tertiaryInfo->id);
+ EXPECT_NE(secondaryInfo->id, tertiaryInfo->id);
+}
+
+TEST(DisplayIdentificationTest, getFallbackDisplayId) {
+ // Manufacturer ID should be invalid.
+ ASSERT_FALSE(getPnpId(getFallbackDisplayId(0)));
+ ASSERT_FALSE(getPnpId(getFallbackDisplayId(0xffu)));
+}
+
+TEST(DisplayIdentificationTest, getVirtualDisplayId) {
+ // Manufacturer ID should be invalid.
+ ASSERT_FALSE(getPnpId(getVirtualDisplayId(0)));
+ ASSERT_FALSE(getPnpId(getVirtualDisplayId(0xffff'ffffu)));
}
} // namespace android