kmsro: Add etnaviv renderonly support

Enable using etnaviv for KMS renderonly. This still needs KMS driver
name mapping to kmsro to be used automatically.

Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Rob Herring <robh@kernel.org>

meson.build

@@ -213,8 +213,8 @@ endif
 if with_gallium_imx and not with_gallium_etnaviv
   error('IMX driver requires etnaviv driver')
 endif
-if with_gallium_kmsro and not with_gallium_vc4
-  error('kmsro driver requires vc4 driver')
+if with_gallium_kmsro and not (with_gallium_vc4 or with_gallium_etnaviv)
+  error('kmsro driver requires one or more renderonly drivers (vc4, etnaviv)')
 endif
 if with_gallium_tegra and not with_gallium_nouveau
   error('tegra driver requires nouveau driver')

src/gallium/meson.build

@@ -89,6 +89,12 @@ if with_gallium_vc4
 else
   driver_vc4 = declare_dependency()
 endif
+if with_gallium_etnaviv
+  subdir('winsys/etnaviv/drm')
+  subdir('drivers/etnaviv')
+else
+  driver_etnaviv = declare_dependency()
+endif
 if with_gallium_kmsro
   subdir('winsys/kmsro/drm')
 else
@@ -100,12 +106,6 @@ if with_gallium_v3d
 else
   driver_v3d = declare_dependency()
 endif
-if with_gallium_etnaviv
-  subdir('winsys/etnaviv/drm')
-  subdir('drivers/etnaviv')
-else
-  driver_etnaviv = declare_dependency()
-endif
 if with_gallium_imx
   subdir('winsys/imx/drm')
 else

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

@@ -29,6 +29,14 @@ AM_CFLAGS = \
 	$(GALLIUM_WINSYS_CFLAGS) \
 	$(LIBDRM_CFLAGS)
 
+if HAVE_GALLIUM_ETNAVIV
+AM_CFLAGS += -DGALLIUM_ETNAVIV
+endif
+
+if HAVE_GALLIUM_VC4
+AM_CFLAGS += -DGALLIUM_VC4
+endif
+
 noinst_LTLIBRARIES = libkmsrodrm.la
 
 libkmsrodrm_la_SOURCES = $(C_SOURCES)

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

@@ -27,6 +27,7 @@
 
 #include "kmsro_drm_public.h"
 #include "vc4/drm/vc4_drm_public.h"
+#include "etnaviv/drm/etnaviv_drm_public.h"
 #include "xf86drm.h"
 
 #include "pipe/p_screen.h"
@@ -34,22 +35,39 @@
 
 struct pipe_screen *kmsro_drm_screen_create(int fd)
 {
+   struct pipe_screen *screen = NULL;
    struct renderonly ro = {
+      .kms_fd = fd,
+      .gpu_fd = -1,
+   };
+
+#if defined(GALLIUM_VC4)
+   ro.gpu_fd = drmOpenWithType("vc4", NULL, DRM_NODE_RENDER);
+   if (ro.gpu_fd >= 0) {
       /* Passes the vc4-allocated BO through to the KMS-only DRM device using
        * PRIME buffer sharing.  The VC4 BO must be linear, which the SCANOUT
        * flag on allocation will have ensured.
        */
-      .create_for_resource = renderonly_create_gpu_import_for_resource,
-      .kms_fd = fd,
-      .gpu_fd = drmOpenWithType("vc4", NULL, DRM_NODE_RENDER),
-   };
+      ro.create_for_resource = renderonly_create_gpu_import_for_resource,
+      screen = vc4_drm_screen_create_renderonly(&ro);
+      if (!screen)
+         close(ro.gpu_fd);
 
-   if (ro.gpu_fd < 0)
-      return NULL;
+      return screen;
+   }
+#endif
 
-   struct pipe_screen *screen = vc4_drm_screen_create_renderonly(&ro);
-   if (!screen)
-      close(ro.gpu_fd);
+#if defined(GALLIUM_ETNAVIV)
+   ro.gpu_fd = drmOpenWithType("etnaviv", NULL, DRM_NODE_RENDER);
+   if (ro.gpu_fd >= 0) {
+      ro.create_for_resource = renderonly_create_kms_dumb_buffer_for_resource,
+      screen = etna_drm_screen_create_renderonly(&ro);
+      if (!screen)
+         close(ro.gpu_fd);
+
+      return screen;
+   }
+#endif
 
    return screen;
 }

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

@@ -18,6 +18,14 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+kmsro_c_args = []
+if with_gallium_etnaviv
+  kmsro_c_args += '-DGALLIUM_ETNAVIV'
+endif
+if with_gallium_vc4
+  kmsro_c_args += '-DGALLIUM_VC4'
+endif
+
 libkmsrowinsys = static_library(
   'kmsrowinsys',
   files('kmsro_drm_winsys.c'),
@@ -25,9 +33,8 @@ libkmsrowinsys = static_library(
     inc_src, inc_include,
     inc_gallium, inc_gallium_aux, inc_gallium_winsys,
   ],
-  c_args : [c_vis_args],
+  c_args : [c_vis_args, kmsro_c_args],
   dependencies: dep_libdrm,
-  link_with : libvc4winsys,
 )
 
 driver_kmsro = declare_dependency(