radv: implement VK_EXT_sample_locations and disable it

Basically, this extension allows applications to use custom
sample locations. It doesn't support variable sample locations
during subpass. Note that we don't have to upload the user
sample locations because the spec doesn't allow this.

The extension is currently disabled because the driver needs to
support variable sample locations during layout transitions. The
depth decompress needs to know them and that's a bit invasive.

Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Bas Nieuwenhuizen <[email protected]>

1 files changed, 35 insertions, 0 deletions

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index c50908bcfcb..9e50038e22a 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -1367,6 +1367,27 @@ void radv_GetPhysicalDeviceProperties2(
 			props->maxDescriptorSetUpdateAfterBindInlineUniformBlocks = MAX_INLINE_UNIFORM_BLOCK_COUNT;
 			break;
 		}
+		case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SAMPLE_LOCATIONS_PROPERTIES_EXT: {
+			VkPhysicalDeviceSampleLocationsPropertiesEXT *properties =
+				(VkPhysicalDeviceSampleLocationsPropertiesEXT *)ext;
+			/* TODO: The ext is currently disabled because the
+			 * driver needs to handle sample locations during
+			 * layout transitions for depth/stencil surfaces and
+			 * HTILE.
+			 */
+			properties->sampleLocationSampleCounts = VK_SAMPLE_COUNT_1_BIT;
+			/*
+			properties->sampleLocationSampleCounts = VK_SAMPLE_COUNT_2_BIT |
+								 VK_SAMPLE_COUNT_4_BIT |
+								 VK_SAMPLE_COUNT_8_BIT;
+			*/
+			properties->maxSampleLocationGridSize = (VkExtent2D){ 2 , 2 };
+			properties->sampleLocationCoordinateRange[0] = 0.0f;
+			properties->sampleLocationCoordinateRange[1] = 0.9375f;
+			properties->sampleLocationSubPixelBits = 4;
+			properties->variableSampleLocations = VK_FALSE;
+			break;
+		}
 		default:
 			break;
 		}
@@ -5368,3 +5389,17 @@ VkResult radv_GetCalibratedTimestampsEXT(
 
 	return VK_SUCCESS;
 }
+
+void radv_GetPhysicalDeviceMultisamplePropertiesEXT(
+    VkPhysicalDevice                            physicalDevice,
+    VkSampleCountFlagBits                       samples,
+    VkMultisamplePropertiesEXT*                 pMultisampleProperties)
+{
+	if (samples & (VK_SAMPLE_COUNT_2_BIT |
+		       VK_SAMPLE_COUNT_4_BIT |
+		       VK_SAMPLE_COUNT_8_BIT)) {
+		pMultisampleProperties->maxSampleLocationGridSize = (VkExtent2D){ 2, 2 };
+	} else {
+		pMultisampleProperties->maxSampleLocationGridSize = (VkExtent2D){ 0, 0 };
+	}
+}