gralloc: set supported planes for buffers on allocation

This is done so that we should not have to do it dynamically during
composition. This information will be used later with hwcomposer module
when using planes for composition.

Change-Id: I2b6716fe9a8da81050645900c6c0955385946991
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>

4 files changed, 30 insertions, 1 deletions

diff --git a/gralloc_drm.c b/gralloc_drm.c
index 53d764a..3006a9f 100644
--- a/gralloc_drm.c
+++ b/gralloc_drm.c
@@ -262,6 +262,7 @@ static struct gralloc_drm_handle_t *create_bo_handle(int width,
 	handle->height = height;
 	handle->format = format;
 	handle->usage = usage;
+	handle->plane_mask = 0;
 
 	return handle;
 }
@@ -279,6 +280,8 @@ struct gralloc_drm_bo_t *gralloc_drm_bo_create(struct gralloc_drm_t *drm,
 	if (!handle)
 		return NULL;
 
+	handle->plane_mask = planes_for_format(drm, format);
+
 	bo = drm->drv->alloc(drm->drv, handle);
 	if (!bo) {
 		free(handle);
diff --git a/gralloc_drm.h b/gralloc_drm.h
index b06e438..8059907 100644
--- a/gralloc_drm.h
+++ b/gralloc_drm.h
@@ -122,6 +122,7 @@ struct gralloc_drm_bo_t *gralloc_drm_bo_from_handle(buffer_handle_t handle);
 buffer_handle_t gralloc_drm_bo_get_handle(struct gralloc_drm_bo_t *bo, int *stride);
 int gralloc_drm_get_gem_handle(buffer_handle_t handle);
 void gralloc_drm_resolve_format(buffer_handle_t _handle, uint32_t *pitches, uint32_t *offsets, uint32_t *handles);
+unsigned int planes_for_format(struct gralloc_drm_t *drm, int hal_format);
 
 int gralloc_drm_bo_lock(struct gralloc_drm_bo_t *bo, int x, int y, int w, int h, int enable_write, void **addr);
 void gralloc_drm_bo_unlock(struct gralloc_drm_bo_t *bo);
diff --git a/gralloc_drm_handle.h b/gralloc_drm_handle.h
index 430b480..70a1ae8 100644
--- a/gralloc_drm_handle.h
+++ b/gralloc_drm_handle.h
@@ -31,7 +31,7 @@ struct gralloc_drm_handle_t {
 	native_handle_t base;
 
 #define GRALLOC_DRM_HANDLE_MAGIC 0x12345678
-#define GRALLOC_DRM_HANDLE_NUM_INTS 9
+#define GRALLOC_DRM_HANDLE_NUM_INTS 10
 #define GRALLOC_DRM_HANDLE_NUM_FDS 0
 	int magic;
 
@@ -40,6 +40,8 @@ struct gralloc_drm_handle_t {
 	int format;
 	int usage;
 
+	unsigned int plane_mask; /* planes that support handle */
+
 	int name;   /* the name of the bo */
 	int stride; /* the stride in bytes */
 
diff --git a/gralloc_drm_kms.c b/gralloc_drm_kms.c
index a921e6c..91e7e63 100644
--- a/gralloc_drm_kms.c
+++ b/gralloc_drm_kms.c
@@ -87,6 +87,29 @@ static int resolve_drm_format(struct gralloc_drm_bo_t *bo,
 }
 
 /*
+ * Returns planes that are supported for a particular format
+ */
+unsigned int planes_for_format(struct gralloc_drm_t *drm,
+	int hal_format)
+{
+	unsigned int i, j, mask = 0;
+	unsigned int drm_format = drm_format_from_hal(hal_format);
+	struct gralloc_drm_plane_t *plane = drm->planes;
+
+	/* no planes available */
+	if (!plane)
+		return 0;
+
+	/* iterate through planes, mark those that match format */
+	for (i=0; i<drm->plane_resources->count_planes; i++, plane++)
+		for (j=0; j<plane->drm_plane->count_formats; j++)
+			if (plane->drm_plane->formats[j] == drm_format)
+				mask |= (2 << plane->drm_plane->plane_id);
+
+	return mask;
+}
+
+/*
  * Add a fb object for a bo.
  */
 int gralloc_drm_bo_add_fb(struct gralloc_drm_bo_t *bo)