anv: Add KHR_display extension to anv [v7]

This adds support for the KHR_display extension to the anv 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: Make sure primary fd is usable

	When KHR_display is selected, we try to open the primary node
	instead of the render node in case the user wants to use
	KHR_display for presentation. However, if we're actually going
	to end up using RandR leases, then we don't care if the
	resulting fd can't be used for display, but the kernel also
	prevents us from using it for drawing when someone else has
	master.

v3:
	Simplify addition of VK_USE_PLATFORM_DISPLAY_KHR to vulkan_wsi_args

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

v4:
	Adapt primary node usage to new wsi_device_init API

v5:
	Adopt Jason Ekstrand's coding conventions

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

	Remove spurious MM_PER_PIXEL define

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

v6:
	Open DRM master before initializing WSI layer.

	The DRM master FD is passed to the WSI layer during
	initialization, so we need to open the device slightly earlier
	in the function.

	Close DRM master in device_finish.

	Use anv_gem_get_param to detect working master_fd instead of
	directly using the ioctl.

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

v7:
	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]>

5 files changed, 164 insertions, 3 deletions

diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c
index 294a145c1a8..b3d30675b1e 100644
--- a/src/intel/vulkan/anv_device.c
+++ b/src/intel/vulkan/anv_device.c
@@ -274,6 +274,7 @@ anv_physical_device_init_uuids(struct anv_physical_device *device)
 static VkResult
 anv_physical_device_init(struct anv_physical_device *device,
                          struct anv_instance *instance,
+                         const char *primary_path,
                          const char *path)
 {
    VkResult result;
@@ -440,6 +441,20 @@ anv_physical_device_init(struct anv_physical_device *device,
    if (result != VK_SUCCESS)
       goto fail;
 
+   if (instance->enabled_extensions.KHR_display) {
+      master_fd = open(primary_path, O_RDWR | O_CLOEXEC);
+      if (master_fd >= 0) {
+         /* prod the device with a GETPARAM call which will fail if
+          * we don't have permission to even render on this device
+          */
+         if (anv_gem_get_param(master_fd, I915_PARAM_CHIPSET_ID) == 0) {
+            close(master_fd);
+            master_fd = -1;
+         }
+      }
+   }
+   device->master_fd = master_fd;
+
    result = anv_init_wsi(device);
    if (result != VK_SUCCESS) {
       ralloc_free(device->compiler);
@@ -449,8 +464,9 @@ anv_physical_device_init(struct anv_physical_device *device,
    anv_physical_device_get_supported_extensions(device,
                                                 &device->supported_extensions);
 
+
    device->local_fd = fd;
-   device->master_fd = master_fd;
+
    return VK_SUCCESS;
 
 fail:
@@ -466,6 +482,8 @@ anv_physical_device_finish(struct anv_physical_device *device)
    anv_finish_wsi(device);
    ralloc_free(device->compiler);
    close(device->local_fd);
+   if (device->master_fd >= 0)
+      close(device->master_fd);
 }
 
 static void *
@@ -639,6 +657,7 @@ anv_enumerate_devices(struct anv_instance *instance)
 
          result = anv_physical_device_init(&instance->physicalDevice,
                         instance,
+                        devices[i]->nodes[DRM_NODE_PRIMARY],
                         devices[i]->nodes[DRM_NODE_RENDER]);
          if (result != VK_ERROR_INCOMPATIBLE_DRIVER)
             break;
diff --git a/src/intel/vulkan/anv_extensions.py b/src/intel/vulkan/anv_extensions.py
index 18851c0ff90..c3c9933b9f8 100644
--- a/src/intel/vulkan/anv_extensions.py
+++ b/src/intel/vulkan/anv_extensions.py
@@ -109,6 +109,7 @@ EXTENSIONS = [
     Extension('VK_KHR_xcb_surface',                       6, 'VK_USE_PLATFORM_XCB_KHR'),
     Extension('VK_KHR_xlib_surface',                      6, 'VK_USE_PLATFORM_XLIB_KHR'),
     Extension('VK_KHR_multiview',                         1, True),
+    Extension('VK_KHR_display',                          23, 'VK_USE_PLATFORM_DISPLAY_KHR'),
     Extension('VK_EXT_debug_report',                      8, True),
     Extension('VK_EXT_external_memory_dma_buf',           1, True),
     Extension('VK_EXT_global_priority',                   1,
diff --git a/src/intel/vulkan/anv_extensions_gen.py b/src/intel/vulkan/anv_extensions_gen.py
index b75cb3e6fbb..a8b398f630d 100644
--- a/src/intel/vulkan/anv_extensions_gen.py
+++ b/src/intel/vulkan/anv_extensions_gen.py
@@ -103,7 +103,7 @@ _TEMPLATE_C = Template(COPYRIGHT + """
 #include "vk_util.h"
 
 /* Convert the VK_USE_PLATFORM_* defines to booleans */
-%for platform in ['ANDROID', 'WAYLAND', 'XCB', 'XLIB']:
+%for platform in ['ANDROID', 'WAYLAND', 'XCB', 'XLIB', 'DISPLAY']:
 #ifdef VK_USE_PLATFORM_${platform}_KHR
 #   undef VK_USE_PLATFORM_${platform}_KHR
 #   define VK_USE_PLATFORM_${platform}_KHR true
@@ -122,7 +122,8 @@ _TEMPLATE_C = Template(COPYRIGHT + """
 
 #define ANV_HAS_SURFACE (VK_USE_PLATFORM_WAYLAND_KHR || \\
                          VK_USE_PLATFORM_XCB_KHR || \\
-                         VK_USE_PLATFORM_XLIB_KHR)
+                         VK_USE_PLATFORM_XLIB_KHR || \\
+                         VK_USE_PLATFORM_DISPLAY_KHR)
 
 static const uint32_t MAX_API_VERSION = ${MAX_API_VERSION.c_vk_version()};
 
diff --git a/src/intel/vulkan/anv_wsi_display.c b/src/intel/vulkan/anv_wsi_display.c
new file mode 100644
index 00000000000..35aff11dfd2
--- /dev/null
+++ b/src/intel/vulkan/anv_wsi_display.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright © 2017 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include "anv_private.h"
+#include "wsi_common.h"
+#include "vk_format_info.h"
+#include "vk_util.h"
+#include "wsi_common_display.h"
+
+VkResult
+anv_GetPhysicalDeviceDisplayPropertiesKHR(VkPhysicalDevice physical_device,
+                                          uint32_t *property_count,
+                                          VkDisplayPropertiesKHR *properties)
+{
+   ANV_FROM_HANDLE(anv_physical_device, pdevice, physical_device);
+
+   return wsi_display_get_physical_device_display_properties(
+      physical_device,
+      &pdevice->wsi_device,
+      property_count,
+      properties);
+}
+
+VkResult
+anv_GetPhysicalDeviceDisplayPlanePropertiesKHR(
+   VkPhysicalDevice physical_device,
+   uint32_t *property_count,
+   VkDisplayPlanePropertiesKHR *properties)
+{
+   ANV_FROM_HANDLE(anv_physical_device, pdevice, physical_device);
+
+   return wsi_display_get_physical_device_display_plane_properties(
+      physical_device, &pdevice->wsi_device,
+      property_count, properties);
+}
+
+VkResult
+anv_GetDisplayPlaneSupportedDisplaysKHR(VkPhysicalDevice physical_device,
+                                        uint32_t plane_index,
+                                        uint32_t *display_count,
+                                        VkDisplayKHR *displays)
+{
+   ANV_FROM_HANDLE(anv_physical_device, pdevice, physical_device);
+
+   return wsi_display_get_display_plane_supported_displays(physical_device,
+                                                           &pdevice->wsi_device,
+                                                           plane_index,
+                                                           display_count,
+                                                           displays);
+}
+
+
+VkResult
+anv_GetDisplayModePropertiesKHR(VkPhysicalDevice physical_device,
+                                VkDisplayKHR display,
+                                uint32_t *property_count,
+                                VkDisplayModePropertiesKHR *properties)
+{
+   ANV_FROM_HANDLE(anv_physical_device, pdevice, physical_device);
+
+   return wsi_display_get_display_mode_properties(physical_device,
+                                                  &pdevice->wsi_device,
+                                                  display,
+                                                  property_count,
+                                                  properties);
+}
+
+VkResult
+anv_CreateDisplayModeKHR(VkPhysicalDevice physical_device,
+                         VkDisplayKHR display,
+                         const VkDisplayModeCreateInfoKHR *create_info,
+                         const VkAllocationCallbacks *allocator,
+                         VkDisplayModeKHR *mode)
+{
+   ANV_FROM_HANDLE(anv_physical_device, pdevice, physical_device);
+
+   return wsi_display_create_display_mode(physical_device,
+                                          &pdevice->wsi_device,
+                                          display,
+                                          create_info,
+                                          allocator,
+                                          mode);
+}
+
+VkResult
+anv_GetDisplayPlaneCapabilitiesKHR(VkPhysicalDevice physical_device,
+                                   VkDisplayModeKHR mode_khr,
+                                   uint32_t plane_index,
+                                   VkDisplayPlaneCapabilitiesKHR *capabilities)
+{
+   ANV_FROM_HANDLE(anv_physical_device, pdevice, physical_device);
+
+   return wsi_get_display_plane_capabilities(physical_device,
+                                             &pdevice->wsi_device,
+                                             mode_khr,
+                                             plane_index,
+                                             capabilities);
+}
+
+VkResult
+anv_CreateDisplayPlaneSurfaceKHR(
+   VkInstance _instance,
+   const VkDisplaySurfaceCreateInfoKHR *create_info,
+   const VkAllocationCallbacks *allocator,
+   VkSurfaceKHR *surface)
+{
+   ANV_FROM_HANDLE(anv_instance, instance, _instance);
+   const VkAllocationCallbacks *alloc;
+
+   if (allocator)
+     alloc = allocator;
+   else
+     alloc = &instance->alloc;
+
+   return wsi_create_display_surface(_instance, alloc, create_info, surface);
+}
diff --git a/src/intel/vulkan/meson.build b/src/intel/vulkan/meson.build
index 159ad092314..797473500ff 100644
--- a/src/intel/vulkan/meson.build
+++ b/src/intel/vulkan/meson.build
@@ -164,6 +164,11 @@ if with_platform_wayland
   libanv_files += files('anv_wsi_wayland.c')
 endif
 
+if with_platform_drm
+  anv_flags += '-DVK_USE_PLATFORM_DISPLAY_KHR'
+  libanv_files += files('anv_wsi_display.c')
+endif
+
 libanv_common = static_library(
   'anv_common',
   [libanv_files, anv_entrypoints, anv_extensions_c, anv_extensions_h],