Add code to use VK_KEITHP_kms_display extension

Open the DRM render node for now; we'll get a lease later on.

Signed-off-by: Keith Packard <keithp@keithp.com>

2 files changed, 17 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 475c788..91544e4 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@ GLSV=glslangValidator
 
 SPV=cube-vert.spv cube-frag.spv
 
-CFLAGS=-O0 -g -DVK_USE_PLATFORM_XCB_KHR -I/local/xorg/include
+CFLAGS=-O0 -g -DVK_USE_PLATFORM_XCB_KHR -DVK_USE_PLATFORM_KMS_KEITHP -I/local/xorg/include -I/local/xorg/include/libdrm
 
 all: $(TARGET) $(SPV)
 
diff --git a/cube.c b/cube.c
index 4db3d91..2f94711 100644
--- a/cube.c
+++ b/cube.c
@@ -33,6 +33,9 @@
 #include <stdbool.h>
 #include <assert.h>
 #include <signal.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #if defined(VK_USE_PLATFORM_XLIB_KHR) || defined(VK_USE_PLATFORM_XCB_KHR)
 #include <X11/Xutil.h>
 #endif
@@ -3074,6 +3077,7 @@ static void demo_init_vk(struct demo *demo) {
     /* Look for instance extensions */
     VkBool32 surfaceExtFound = 0;
     VkBool32 platformSurfaceExtFound = 0;
+    VkBool32 kmsExtFound = 0;
     memset(demo->extension_names, 0, sizeof(demo->extension_names));
 
     err = vkEnumerateInstanceExtensionProperties(
@@ -3147,6 +3151,11 @@ static void demo_init_vk(struct demo *demo) {
                 demo->extension_names[demo->enabled_extension_count++] = VK_MVK_MACOS_SURFACE_EXTENSION_NAME;
             }
 #endif
+	    if (!strcmp(VK_KEITHP_KMS_DISPLAY_EXTENSION_NAME,
+			instance_extensions[i].extensionName)) {
+		printf("found kms display extension\n");
+		demo->extension_names[demo->enabled_extension_count++] = VK_KEITHP_KMS_DISPLAY_EXTENSION_NAME;
+	    }
             if (!strcmp(VK_EXT_DEBUG_REPORT_EXTENSION_NAME,
                         instance_extensions[i].extensionName)) {
                 if (demo->validate) {
@@ -3298,6 +3307,12 @@ static void demo_init_vk(struct demo *demo) {
                  "vkCreateInstance Failure");
     }
 
+    VkKmsDisplayInfoKEITHP display_info = {
+	.fd = open("/dev/dri/renderD128", 2),
+    };
+
+    vkSetKmsDisplayInfoKEITHP(demo->inst, &display_info);
+
     /* Make initial call to query gpu_count, then second call for gpu info*/
     err = vkEnumeratePhysicalDevices(demo->inst, &gpu_count, NULL);
     assert(!err && gpu_count > 0);
@@ -3316,6 +3331,7 @@ static void demo_init_vk(struct demo *demo) {
                  "additional information.\n",
                  "vkEnumeratePhysicalDevices Failure");
     }
+    close(display_info.fd);
 
     /* Look for device extensions */
     uint32_t device_extension_count = 0;