radv: Add KHR_display extension to radv [v5]

This adds support for the KHR_display extension to the radv Vulkan
driver. The driver now attempts to open the master DRM node when the
KHR_display extension is requested so that the common winsys code can
perform the necessary operations.

v2:
	* Simplify addition of VK_USE_PLATFORM_DISPLAY_KHR to
          vulkan_wsi_args

	Suggested-by: Eric Engestrom <[email protected]>

v3:
	Adapt to new wsi_device_init API (added display_fd)

v4:
	Adopt Jason Ekstrand's coding conventions

	Declare variables at first use, eliminate extra whitespace
	between types and names. Wrap lines to 80 columns.

	Suggested-by: Jason Ekstrand <[email protected]>

v5:
	Add vkCreateDisplayModeKHR. This doesn't actually create
	new modes, it only looks to see if the requested parameters
	matches an existing mode and returns that.

    	Suggested-by: Jason Ekstrand <[email protected]>

Signed-off-by: Keith Packard <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 056043a9169..ffeb6450b33 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -274,6 +274,23 @@ radv_physical_device_init(struct radv_physical_device *device,
 		goto fail;
 	}
 
+	if (instance->enabled_extensions.KHR_display) {
+		master_fd = open(drm_device->nodes[DRM_NODE_PRIMARY], O_RDWR | O_CLOEXEC);
+		if (master_fd >= 0) {
+			uint32_t accel_working = 0;
+			struct drm_amdgpu_info request = {
+				.return_pointer = (uintptr_t)&accel_working,
+				.return_size = sizeof(accel_working),
+				.query = AMDGPU_INFO_ACCEL_WORKING
+			};
+
+			if (drmCommandWrite(master_fd, DRM_AMDGPU_INFO, &request, sizeof (struct drm_amdgpu_info)) < 0 || !accel_working) {
+				close(master_fd);
+				master_fd = -1;
+			}
+		}
+	}
+
 	device->master_fd = master_fd;
 	device->local_fd = fd;
 	device->ws->query_info(device->ws, &device->rad_info);