pal: Add support for VK_FORMAT_R16G16B16A16_UNORM swapchain buffers.

Map VK_FORMAT_R16G16B16A16_UNORM to Linux DRM_FORMAT_XBGR16161616 for direct scanout and display. This is supported by amdgpu-kms DisplayCore since Linux 5.TODO. Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
kleinerm · Feb 23, 2021 · a25d480 · a25d480
1 parent e7714f1
commit a25d480
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diff --git a/src/core/os/amdgpu/amdgpuDevice.cpp b/src/core/os/amdgpu/amdgpuDevice.cpp
@@ -133,6 +133,10 @@ constexpr SwizzledFormat PresentableSwizzledFormat[] =
         ChNumFormat::X10Y10Z10W2_Unorm,
         { ChannelSwizzle::X, ChannelSwizzle::Y, ChannelSwizzle::Z, ChannelSwizzle::W }
     },
+    {
+        ChNumFormat::X16Y16Z16W16_Unorm,
+        { ChannelSwizzle::X, ChannelSwizzle::Y, ChannelSwizzle::Z, ChannelSwizzle::W }
+    },
 };
 
 // 64 bpp formats are supported on more recent supported gpu's and amdgpu kms drivers:

diff --git a/src/core/os/amdgpu/display/displayWindowSystem.cpp b/src/core/os/amdgpu/display/displayWindowSystem.cpp
@@ -41,6 +41,10 @@ namespace Pal
 namespace Amdgpu
 {
 
+#ifndef DRM_FORMAT_XBGR16161616
+#define DRM_FORMAT_XBGR16161616        fourcc_code('X', 'B', '4', '8') /* [63:0] x:B:G:R 16:16:16:16 little endian */
+#endif
+
 // ====================================================================================================================a
 // Convert PAL format to Wayland Drm format
 static uint32 PalToDrmFormat(
@@ -70,6 +74,10 @@ static uint32 PalToDrmFormat(
 
             break;
 
+        case ChNumFormat::X16Y16Z16W16_Unorm:
+            drmFormat = DRM_FORMAT_XBGR16161616;
+            break;
+
         case ChNumFormat::X16Y16Z16W16_Float:
             drmFormat = DRM_FORMAT_XBGR16161616F;
             break;