zink: Fix one addicional case when running a compositor

Covers the case where the `dri2_init_screen` calls
`pipe_loader_create_screen_vk` directly and not sets
the device major and minor.

Signed-off-by: Igor Torrente <igor.torrente@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24678>

src/gallium/auxiliary/pipe-loader/pipe_loader.c

@@ -171,8 +171,6 @@ pipe_loader_create_screen_vk(struct pipe_loader_device *dev, bool sw_vk)
    pipe_loader_load_options(dev);
    config.options_info = &dev->option_info;
    config.options = &dev->option_cache;
-   config.dev_major = dev->dev_major;
-   config.dev_minor = dev->dev_minor;
 
    return dev->ops->create_screen(dev, &config, sw_vk);
 }

src/gallium/auxiliary/pipe-loader/pipe_loader.h

@@ -64,8 +64,6 @@ struct pipe_loader_device {
       } pci;
    } u; /**< Discriminated by \a type */
 
-   int64_t dev_major;
-   int64_t dev_minor;
    char *driver_name;
    const struct pipe_loader_ops *ops;
 

src/gallium/drivers/zink/zink_screen.c

@@ -50,6 +50,13 @@
 
 #include "util/u_cpu_detect.h"
 
+#ifdef HAVE_LIBDRM
+#include <xf86drm.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#endif
+
 static int num_screens = 0;
 bool zink_tracing = false;
 
@@ -2852,7 +2859,7 @@ zink_screen_get_fd(struct pipe_screen *pscreen)
 }
 
 static struct zink_screen *
-zink_internal_create_screen(const struct pipe_screen_config *config)
+zink_internal_create_screen(const struct pipe_screen_config *config, int64_t dev_major, int64_t dev_minor)
 {
    if (getenv("ZINK_USE_LAVAPIPE")) {
       mesa_loge("ZINK_USE_LAVAPIPE is obsolete. Use LIBGL_ALWAYS_SOFTWARE\n");
@@ -2904,7 +2911,7 @@ zink_internal_create_screen(const struct pipe_screen_config *config)
       screen->driconf.zink_shader_object_enable = driQueryOptionb(config->options, "zink_shader_object_enable");
    }
 
-   if (!zink_create_instance(screen, config && config->dev_major > 0 && config->dev_major < 255))
+   if (!zink_create_instance(screen, dev_major > 0 && dev_major < 255))
       goto fail;
 
    if (zink_debug & ZINK_DEBUG_VALIDATION) {
@@ -2928,7 +2935,7 @@ zink_internal_create_screen(const struct pipe_screen_config *config)
       (zink_debug & ZINK_DEBUG_VALIDATION) && !create_debug(screen))
       debug_printf("ZINK: failed to setup debug utils\n");
 
-   choose_pdev(screen, config ? config->dev_major : 0, config ? config->dev_minor : 0);
+   choose_pdev(screen, dev_major, dev_minor);
    if (screen->pdev == VK_NULL_HANDLE) {
       mesa_loge("ZINK: failed to choose pdev");
       goto fail;
@@ -3282,7 +3289,7 @@ fail:
 struct pipe_screen *
 zink_create_screen(struct sw_winsys *winsys, const struct pipe_screen_config *config)
 {
-   struct zink_screen *ret = zink_internal_create_screen(config);
+   struct zink_screen *ret = zink_internal_create_screen(config, -1, -1);
    if (ret) {
       ret->drm_fd = -1;
    }
@@ -3290,10 +3297,51 @@ zink_create_screen(struct sw_winsys *winsys, const struct pipe_screen_config *co
    return &ret->base;
 }
 
+static inline int
+zink_render_rdev(int fd, int64_t *dev_major, int64_t *dev_minor)
+{
+   int ret = 0;
+   *dev_major = *dev_minor = -1;
+#ifdef HAVE_LIBDRM
+   struct stat stx;
+   drmDevicePtr dev;
+
+   if (fd == -1)
+      return 0;
+
+   if (drmGetDevice2(fd, 0, &dev))
+      return -1;
+
+   if(!(dev->available_nodes & (1 << DRM_NODE_RENDER))) {
+      ret = -1;
+      goto free_device;
+   }
+
+   if(stat(dev->nodes[DRM_NODE_RENDER], &stx)) {
+      ret = -1;
+      goto free_device;
+   }
+
+   *dev_major = major(stx.st_rdev);
+   *dev_minor = minor(stx.st_rdev);
+
+free_device:
+   drmFreeDevice(&dev);
+#endif //HAVE_LIBDRM
+
+   return ret;
+}
+
 struct pipe_screen *
 zink_drm_create_screen(int fd, const struct pipe_screen_config *config)
 {
-   struct zink_screen *ret = zink_internal_create_screen(config);
+   int64_t dev_major, dev_minor;
+   struct zink_screen *ret;
+
+   if (zink_render_rdev(fd, &dev_major, &dev_minor))
+      return NULL;
+
+   ret = zink_internal_create_screen(config, dev_major, dev_minor);
 
    if (ret)
       ret->drm_fd = os_dupfd_cloexec(fd);

src/gallium/frontends/dri/kopper.c

@@ -43,13 +43,6 @@
 
 #include <vulkan/vulkan.h>
 
-#ifdef HAVE_LIBDRM
-#include <xf86drm.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <sys/sysmacros.h>
-#endif
-
 #ifdef VK_USE_PLATFORM_XCB_KHR
 #include <xcb/xcb.h>
 #include <xcb/dri3.h>
@@ -116,43 +109,6 @@ static const __DRIextension *drivk_sw_screen_extensions[] = {
    NULL
 };
 
-static int
-kopper_render_rdev(int fd, struct pipe_loader_device *pipe_loader)
-{
-   int ret = 0;
-   pipe_loader->dev_major = -1;
-   pipe_loader->dev_minor = -1;
-
-#ifdef HAVE_LIBDRM
-   struct stat stx;
-   drmDevicePtr dev;
-
-   if (fd == -1)
-      return 0;
-
-   if (drmGetDevice2(fd, 0, &dev))
-      return -1;
-
-   if(!(dev->available_nodes & (1 << DRM_NODE_RENDER))) {
-      ret = -1;
-      goto free_device;
-   }
-
-   if(stat(dev->nodes[DRM_NODE_RENDER], &stx)) {
-      ret = -1;
-      goto free_device;
-   }
-
-   pipe_loader->dev_major = major(stx.st_rdev);
-   pipe_loader->dev_minor = minor(stx.st_rdev);
-
-free_device:
-   drmFreeDevice(&dev);
-#endif //HAVE_LIBDRM
-
-   return ret;
-}
-
 static const __DRIconfig **
 kopper_init_screen(struct dri_screen *screen)
 {
@@ -174,11 +130,8 @@ kopper_init_screen(struct dri_screen *screen)
    else
       success = pipe_loader_vk_probe_dri(&screen->dev, NULL);
 
-   if (success) {
-      if (kopper_render_rdev(screen->fd, screen->dev))
-         goto fail;
+   if (success)
       pscreen = pipe_loader_create_screen(screen->dev);
-   }
 
    if (!pscreen)
       goto fail;

src/gallium/include/pipe/p_screen.h

@@ -799,8 +799,6 @@ struct pipe_screen {
 struct pipe_screen_config {
    struct driOptionCache *options;
    const struct driOptionCache *options_info;
-   int64_t dev_major;
-   int64_t dev_minor;
 };