gralloc: implement yuv offset query as hw specific function

This patch reverts earlier cca14cfd... and introduces a new hw
specific hook to query yuv components offsets which can vary
between different hw, decoders, cameras etc.

Change-Id: Ib60bc8ee28df7bc9425b6d7934294fe36fc55354
Depends-Change-Id: I1aa5368b21e588d5d711c1005fff2a5296e143a0
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/gralloc_drm_intel.c b/gralloc_drm_intel.c
index 649c6ff..725334e 100644
--- a/gralloc_drm_intel.c
+++ b/gralloc_drm_intel.c
@@ -190,6 +190,52 @@ batch_init(struct intel_info *info)
 	return ret;
 }
 
+static void intel_resolve_format(struct gralloc_drm_drv_t *drv,
+		struct gralloc_drm_bo_t *bo,
+		uint32_t *pitches, uint32_t *offsets, uint32_t *handles)
+{
+	/*
+	 * TODO - should take account hw specific padding, alignment
+	 * for camera, video decoder etc.
+	 */
+
+	struct intel_buffer *ib = (struct intel_buffer *) bo;
+
+	memset(pitches, 0, 4 * sizeof(uint32_t));
+	memset(offsets, 0, 4 * sizeof(uint32_t));
+	memset(handles, 0, 4 * sizeof(uint32_t));
+
+	pitches[0] = ib->base.handle->stride;
+	handles[0] = ib->base.fb_handle;
+
+	switch(ib->base.handle->format) {
+		case HAL_PIXEL_FORMAT_YV12:
+
+			// U and V stride are half of Y plane
+			pitches[2] = pitches[0]/2;
+			pitches[1] = pitches[0]/2;
+
+			// like I420 but U and V are in reverse order
+			offsets[2] = offsets[0] +
+				pitches[0] * ib->base.handle->height;
+			offsets[1] = offsets[2] +
+				pitches[2] * ib->base.handle->height/2;
+
+			handles[1] = handles[2] = handles[0];
+			break;
+
+		case HAL_PIXEL_FORMAT_DRM_NV12:
+
+			// U and V are interleaved in 2nd plane
+			pitches[1] = pitches[0];
+			offsets[1] = offsets[0] +
+				pitches[0] * ib->base.handle->height;
+
+			handles[1] = handles[0];
+			break;
+	}
+}
+
 static void intel_copy(struct gralloc_drm_drv_t *drv,
 		struct gralloc_drm_bo_t *dst,
 		struct gralloc_drm_bo_t *src,
@@ -593,6 +639,7 @@ struct gralloc_drm_drv_t *gralloc_drm_drv_create_for_intel(int fd)
 	info->base.map = intel_map;
 	info->base.unmap = intel_unmap;
 	info->base.copy = intel_copy;
+	info->base.resolve_format = intel_resolve_format;
 
 	return &info->base;
 }