Allow GPU composition to occur at a lower resolution
Add a vendor-specified system property to allow GPU fallback composition to occur at a lower resolution than the display mode resolution.
Bug: 144574809
Test: Tested with sysprop disabled, and tested backport in Android Q with sysprop enabled. Unable to test on Android R due to device issues.
Change-Id: I02948ce72f49d20416d0e4dd45a4cffe99e28820
diff --git a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
index 155f718..cfc301b 100644
--- a/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
+++ b/services/surfaceflinger/sysprop/SurfaceFlingerProperties.sysprop
@@ -67,6 +67,26 @@
prop_name: "ro.surface_flinger.max_frame_buffer_acquired_buffers"
}
+# Controls the maximum width in pixels that the graphics pipeline can support for GPU fallback
+# composition. For example, 8k displays with 4k GPUs, or 4k displays with 2k GPUs.
+prop {
+ api_name: "max_graphics_width"
+ type: Integer
+ scope: System
+ access: Readonly
+ prop_name: "ro.surface_flinger.max_graphics_width"
+}
+
+# Controls the maximum height in pixels that the graphics pipeline can support for GPU fallback
+# composition. For example, 8k displays with 4k GPUs, or 4k displays with 2k GPUs.
+prop {
+ api_name: "max_graphics_height"
+ type: Integer
+ scope: System
+ access: Readonly
+ prop_name: "ro.surface_flinger.max_graphics_height"
+}
+
# hasWideColorDisplay indicates that the device has
# or can support a wide-color display, e.g. color space
# greater than sRGB. Typical display may have same
diff --git a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
index e62c127..ba60a7d 100644
--- a/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
+++ b/services/surfaceflinger/sysprop/api/SurfaceFlingerProperties-current.txt
@@ -62,6 +62,16 @@
prop_name: "ro.surface_flinger.max_frame_buffer_acquired_buffers"
}
prop {
+ api_name: "max_graphics_height"
+ type: Integer
+ prop_name: "ro.surface_flinger.max_graphics_height"
+ }
+ prop {
+ api_name: "max_graphics_width"
+ type: Integer
+ prop_name: "ro.surface_flinger.max_graphics_width"
+ }
+ prop {
api_name: "max_virtual_display_dimension"
type: Long
prop_name: "ro.surface_flinger.max_virtual_display_dimension"