panfrost: add driconf infrastructure

This is the boiler-plate code needed to support driver-specific driconf
variables in Panfrost.

Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27916>

src/gallium/auxiliary/target-helpers/drm_helper.h

@@ -331,11 +331,15 @@ pipe_panfrost_create_screen(int fd, const struct pipe_screen_config *config)
 {
    struct pipe_screen *screen;
 
-   screen = panfrost_drm_screen_create(fd);
+   screen = panfrost_drm_screen_create(fd, config);
    return screen ? debug_screen_wrap(screen) : NULL;
 }
-DRM_DRIVER_DESCRIPTOR(panfrost, NULL, 0)
-DRM_DRIVER_DESCRIPTOR_ALIAS(panfrost, panthor, NULL, 0)
+
+const driOptionDescription pan_driconf[] = {
+      #include "panfrost/driinfo_panfrost.h"
+};
+DRM_DRIVER_DESCRIPTOR(panfrost, pan_driconf, ARRAY_SIZE(pan_driconf))
+DRM_DRIVER_DESCRIPTOR_ALIAS(panfrost, panthor, pan_driconf, ARRAY_SIZE(pan_driconf))
 
 #else
 DRM_DRIVER_DESCRIPTOR_STUB(panfrost)
@@ -456,6 +460,9 @@ const driOptionDescription kmsro_driconf[] = {
 #ifdef GALLIUM_FREEDRENO
       #include "freedreno/driinfo_freedreno.h"
 #endif
+#ifdef GALLIUM_PANFROST
+      #include "panfrost/driinfo_panfrost.h"
+#endif
 };
 DRM_DRIVER_DESCRIPTOR(kmsro, kmsro_driconf, ARRAY_SIZE(kmsro_driconf))
 

src/gallium/drivers/panfrost/driinfo_panfrost.h

@@ -0,0 +1 @@
+/* panfrost specific driconf options */

src/gallium/drivers/panfrost/meson.build

@@ -20,6 +20,7 @@
 # SOFTWARE.
 
 files_panfrost = files(
+  'driinfo_panfrost.h',
   'pan_afbc_cso.c',
   'pan_bo.c',
   'pan_device.c',

src/gallium/drivers/panfrost/pan_screen.c

@@ -37,6 +37,7 @@
 #include "util/u_process.h"
 #include "util/u_screen.h"
 #include "util/u_video.h"
+#include "util/xmlconfig.h"
 
 #include <fcntl.h>
 
@@ -834,6 +835,9 @@ panfrost_create_screen(int fd, const struct pipe_screen_config *config,
 
    struct panfrost_device *dev = pan_device(&screen->base);
 
+   driParseConfigFiles(config->options, config->options_info, 0,
+                       "panfrost", NULL, NULL, NULL, 0, NULL, 0);
+
    /* Debug must be set first for pandecode to work correctly */
    dev->debug =
       debug_get_flags_option("PAN_MESA_DEBUG", panfrost_debug_options, 0);

src/gallium/winsys/panfrost/drm/panfrost_drm_public.h

@@ -34,7 +34,9 @@ struct renderonly;
 struct renderonly_scanout;
 struct winsys_handle;
 
-struct pipe_screen *panfrost_drm_screen_create(int drmFD);
+struct pipe_screen *
+panfrost_drm_screen_create(int drmFD,
+                           const struct pipe_screen_config *config);
 struct pipe_screen *
 panfrost_drm_screen_create_renderonly(int fd, struct renderonly *ro,
                                       const struct pipe_screen_config *config);

src/gallium/winsys/panfrost/drm/panfrost_drm_winsys.c

@@ -119,9 +119,9 @@ free_dumb:
 }
 
 struct pipe_screen *
-panfrost_drm_screen_create(int fd)
+panfrost_drm_screen_create(int fd, const struct pipe_screen_config *config)
 {
-   return u_pipe_screen_lookup_or_create(os_dupfd_cloexec(fd), NULL, NULL,
+   return u_pipe_screen_lookup_or_create(os_dupfd_cloexec(fd), config, NULL,
                                          panfrost_create_screen);
 }