kmsro: Add freedreno renderonly support

Signed-off-by: Jonathan Marek <jonathan@marek.ca>

meson.build

@@ -209,8 +209,8 @@ endif
 if with_dri_i915 and with_gallium_i915
   error('Only one i915 provider can be built')
 endif
-if with_gallium_kmsro and not (with_gallium_vc4 or with_gallium_etnaviv)
-  error('kmsro driver requires one or more renderonly drivers (vc4, etnaviv)')
+if with_gallium_kmsro and not (with_gallium_vc4 or with_gallium_etnaviv or with_gallium_freedreno)
+  error('kmsro driver requires one or more renderonly drivers (vc4, etnaviv, freedreno)')
 endif
 if with_gallium_tegra and not with_gallium_nouveau
   error('tegra driver requires nouveau driver')

src/gallium/winsys/kmsro/drm/Makefile.am

@@ -37,6 +37,10 @@ if HAVE_GALLIUM_VC4
 AM_CFLAGS += -DGALLIUM_VC4
 endif
 
+if HAVE_GALLIUM_FREEDRENO
+AM_CFLAGS += -DGALLIUM_FREEDRENO
+endif
+
 noinst_LTLIBRARIES = libkmsrodrm.la
 
 libkmsrodrm_la_SOURCES = $(C_SOURCES)

src/gallium/winsys/kmsro/drm/kmsro_drm_winsys.c

@@ -28,6 +28,7 @@
 #include "kmsro_drm_public.h"
 #include "vc4/drm/vc4_drm_public.h"
 #include "etnaviv/drm/etnaviv_drm_public.h"
+#include "freedreno/drm/freedreno_drm_public.h"
 #include "xf86drm.h"
 
 #include "pipe/p_screen.h"
@@ -69,5 +70,17 @@ struct pipe_screen *kmsro_drm_screen_create(int fd)
    }
 #endif
 
+#if defined(GALLIUM_FREEDRENO)
+   ro.gpu_fd = drmOpenWithType("msm", NULL, DRM_NODE_RENDER);
+   if (ro.gpu_fd >= 0) {
+      ro.create_for_resource = renderonly_create_kms_dumb_buffer_for_resource,
+      screen = fd_drm_screen_create(ro.gpu_fd, &ro);
+      if (!screen)
+         close(ro.gpu_fd);
+
+      return screen;
+   }
+#endif
+
    return screen;
 }

src/gallium/winsys/kmsro/drm/meson.build

@@ -25,6 +25,9 @@ endif
 if with_gallium_vc4
   kmsro_c_args += '-DGALLIUM_VC4'
 endif
+if with_gallium_freedreno
+  kmsro_c_args += '-DGALLIUM_FREEDRENO'
+endif
 
 libkmsrowinsys = static_library(
   'kmsrowinsys',