dri: propagate extra dma_buf import attributes to the drivers

v2: do not break ABI, but instead introduce new entry point for
    dma buffers and bump up the dri-interface version to eight

v3 (Chad): allow the hook to specify an error originating from the
           driver. For now only unsupported format is considered.
           I thought about rejecting the hints also as they are
           addressing only YUV sampling which is not supported at
           the moment but then thought against it as the spec is
           not saying one way or the other.

v4 (Eric, Chad): restrict to rgb formatted only

v5: rebased on top of i915/i965 split

v6 (Chad): document using full extension name

Signed-off-by: Topi Pohjolainen <[email protected]>
Reviewed-by: Chad Versace <[email protected]>

2 files changed, 53 insertions, 2 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_regions.h b/src/mesa/drivers/dri/i965/intel_regions.h
index 428f4dce1dc..ebb54886ac2 100644
--- a/src/mesa/drivers/dri/i965/intel_regions.h
+++ b/src/mesa/drivers/dri/i965/intel_regions.h
@@ -40,6 +40,7 @@
 
 #include "main/mtypes.h"
 #include "intel_bufmgr.h"
+#include <GL/internal/dri_interface.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -149,6 +150,12 @@ struct __DRIimageRec {
    GLuint tile_y;
    bool has_depthstencil;
 
+   /* Provided by EGL_EXT_image_dma_buf_import */
+   enum __DRIYUVColorSpace yuv_color_space;
+   enum __DRISampleRange sample_range;
+   enum __DRIChromaSiting horizontal_siting;
+   enum __DRIChromaSiting vertical_siting;
+
    void *data;
 };
 
diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 3a3efc0f6cf..12a96c03f73 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -684,6 +684,49 @@ intel_create_image_from_fds(__DRIscreen *screen,
    return image;
 }
 
+static __DRIimage *
+intel_create_image_from_dma_bufs(__DRIscreen *screen,
+                                 int width, int height, int fourcc,
+                                 int *fds, int num_fds,
+                                 int *strides, int *offsets,
+                                 enum __DRIYUVColorSpace yuv_color_space,
+                                 enum __DRISampleRange sample_range,
+                                 enum __DRIChromaSiting horizontal_siting,
+                                 enum __DRIChromaSiting vertical_siting,
+                                 unsigned *error,
+                                 void *loaderPrivate)
+{
+   __DRIimage *image;
+   struct intel_image_format *f = intel_image_format_lookup(fourcc);
+
+   /* For now only packed formats that have native sampling are supported. */
+   if (!f || f->nplanes != 1) {
+      *error = __DRI_IMAGE_ERROR_BAD_MATCH;
+      return NULL;
+   }
+
+   image = intel_create_image_from_fds(screen, width, height, fourcc, fds,
+                                       num_fds, strides, offsets,
+                                       loaderPrivate);
+
+   /*
+    * Invalid parameters and any inconsistencies between are assumed to be
+    * checked by the caller. Therefore besides unsupported formats one can fail
+    * only in allocation.
+    */
+   if (!image) {
+      *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
+      return NULL;
+   }
+
+   image->yuv_color_space = yuv_color_space;
+   image->sample_range = sample_range;
+   image->horizontal_siting = horizontal_siting;
+   image->vertical_siting = vertical_siting;
+
+   *error = __DRI_IMAGE_ERROR_SUCCESS;
+   return image;
+}
 
 static __DRIimage *
 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
@@ -744,7 +787,7 @@ intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 }
 
 static struct __DRIimageExtensionRec intelImageExtension = {
-    .base = { __DRI_IMAGE, 7 },
+    .base = { __DRI_IMAGE, 8 },
 
     .createImageFromName                = intel_create_image_from_name,
     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
@@ -756,7 +799,8 @@ static struct __DRIimageExtensionRec intelImageExtension = {
     .createImageFromNames               = intel_create_image_from_names,
     .fromPlanar                         = intel_from_planar,
     .createImageFromTexture             = intel_create_image_from_texture,
-    .createImageFromFds                 = intel_create_image_from_fds
+    .createImageFromFds                 = intel_create_image_from_fds,
+    .createImageFromDmaBufs             = intel_create_image_from_dma_bufs
 };
 
 static const __DRIextension *intelScreenExtensions[] = {