drm_hwcomposer: extract platform-libdrm code from platform-generic
Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
diff --git a/platform/platformlibdrm.cpp b/platform/platformlibdrm.cpp
new file mode 100644
index 0000000..59f1be9
--- /dev/null
+++ b/platform/platformlibdrm.cpp
@@ -0,0 +1,210 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "hwc-platform-libdrm"
+
+#include "platformlibdrm.h"
+
+#include <cutils/properties.h>
+#include <gralloc_handle.h>
+#include <hardware/gralloc.h>
+#include <log/log.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+namespace android {
+
+Importer *Importer::CreateInstance(DrmDevice *drm) {
+ DrmGenericImporter *importer = new LibdrmImporter(drm);
+ if (!importer)
+ return NULL;
+
+ int ret = importer->Init();
+ if (ret) {
+ ALOGE("Failed to initialize the libdrm importer %d", ret);
+ delete importer;
+ return NULL;
+ }
+ return importer;
+}
+
+enum chroma_order {
+ YCbCr,
+ YCrCb,
+};
+
+struct droid_yuv_format {
+ /* Lookup keys */
+ int native; /* HAL_PIXEL_FORMAT_ */
+ enum chroma_order chroma_order; /* chroma order is {Cb, Cr} or {Cr, Cb} */
+ int chroma_step; /* Distance in bytes between subsequent chroma pixels. */
+
+ /* Result */
+ int fourcc; /* DRM_FORMAT_ */
+};
+
+/* The following table is used to look up a DRI image FourCC based
+ * on native format and information contained in android_ycbcr struct. */
+static const struct droid_yuv_format droid_yuv_formats[] = {
+ /* Native format, YCrCb, Chroma step, DRI image FourCC */
+ {HAL_PIXEL_FORMAT_YCbCr_420_888, YCbCr, 2, DRM_FORMAT_NV12},
+ {HAL_PIXEL_FORMAT_YCbCr_420_888, YCbCr, 1, DRM_FORMAT_YUV420},
+ {HAL_PIXEL_FORMAT_YCbCr_420_888, YCrCb, 1, DRM_FORMAT_YVU420},
+ {HAL_PIXEL_FORMAT_YV12, YCrCb, 1, DRM_FORMAT_YVU420},
+ /* HACK: See droid_create_image_from_prime_fds() and
+ * https://issuetracker.google.com/32077885. */
+ {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCbCr, 2, DRM_FORMAT_NV12},
+ {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCbCr, 1, DRM_FORMAT_YUV420},
+ {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCrCb, 1, DRM_FORMAT_YVU420},
+ {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCrCb, 1, DRM_FORMAT_AYUV},
+ {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCrCb, 1, DRM_FORMAT_XYUV8888},
+};
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+
+static int get_fourcc_yuv(int native, enum chroma_order chroma_order,
+ int chroma_step) {
+ for (int i = 0; i < ARRAY_SIZE(droid_yuv_formats); ++i)
+ if (droid_yuv_formats[i].native == native &&
+ droid_yuv_formats[i].chroma_order == chroma_order &&
+ droid_yuv_formats[i].chroma_step == chroma_step)
+ return droid_yuv_formats[i].fourcc;
+
+ return -1;
+}
+
+static bool is_yuv(int native) {
+ for (int i = 0; i < ARRAY_SIZE(droid_yuv_formats); ++i)
+ if (droid_yuv_formats[i].native == native)
+ return true;
+
+ return false;
+}
+
+bool LibdrmImporter::GetYuvPlaneInfo(int num_fds, buffer_handle_t handle,
+ hwc_drm_bo_t *bo) {
+ struct android_ycbcr ycbcr;
+ enum chroma_order chroma_order;
+ int ret;
+
+ if (!gralloc_->lock_ycbcr) {
+ static std::once_flag once;
+ std::call_once(once,
+ []() { ALOGW("Gralloc does not support lock_ycbcr()"); });
+ return false;
+ }
+
+ memset(&ycbcr, 0, sizeof(ycbcr));
+ ret = gralloc_->lock_ycbcr(gralloc_, handle, 0, 0, 0, 0, 0, &ycbcr);
+ if (ret) {
+ ALOGW("gralloc->lock_ycbcr failed: %d", ret);
+ return false;
+ }
+ gralloc_->unlock(gralloc_, handle);
+
+ /* When lock_ycbcr's usage argument contains no SW_READ/WRITE flags
+ * it will return the .y/.cb/.cr pointers based on a NULL pointer,
+ * so they can be interpreted as offsets. */
+ bo->offsets[0] = (size_t)ycbcr.y;
+ /* We assume here that all the planes are located in one DMA-buf. */
+ if ((size_t)ycbcr.cr < (size_t)ycbcr.cb) {
+ chroma_order = YCrCb;
+ bo->offsets[1] = (size_t)ycbcr.cr;
+ bo->offsets[2] = (size_t)ycbcr.cb;
+ } else {
+ chroma_order = YCbCr;
+ bo->offsets[1] = (size_t)ycbcr.cb;
+ bo->offsets[2] = (size_t)ycbcr.cr;
+ }
+
+ /* .ystride is the line length (in bytes) of the Y plane,
+ * .cstride is the line length (in bytes) of any of the remaining
+ * Cb/Cr/CbCr planes, assumed to be the same for Cb and Cr for fully
+ * planar formats. */
+ bo->pitches[0] = ycbcr.ystride;
+ bo->pitches[1] = bo->pitches[2] = ycbcr.cstride;
+
+ /* .chroma_step is the byte distance between the same chroma channel
+ * values of subsequent pixels, assumed to be the same for Cb and Cr. */
+ bo->format = get_fourcc_yuv(bo->hal_format, chroma_order, ycbcr.chroma_step);
+ if (bo->format == -1) {
+ ALOGW(
+ "unsupported YUV format, native = %x, chroma_order = %s, chroma_step = "
+ "%d",
+ bo->hal_format, chroma_order == YCbCr ? "YCbCr" : "YCrCb",
+ (int)ycbcr.chroma_step);
+ return false;
+ }
+
+ /*
+ * Since this is EGL_NATIVE_BUFFER_ANDROID don't assume that
+ * the single-fd case cannot happen. So handle eithe single
+ * fd or fd-per-plane case:
+ */
+ if (num_fds == 1) {
+ bo->prime_fds[2] = bo->prime_fds[1] = bo->prime_fds[0];
+ } else {
+ int expected_planes = (ycbcr.chroma_step == 2) ? 2 : 3;
+ if (num_fds != expected_planes)
+ return false;
+ }
+
+ return true;
+}
+
+int LibdrmImporter::ConvertBoInfo(buffer_handle_t handle, hwc_drm_bo_t *bo) {
+ gralloc_handle_t *gr_handle = gralloc_handle(handle);
+ if (!gr_handle)
+ return -EINVAL;
+
+ bo->width = gr_handle->width;
+ bo->height = gr_handle->height;
+ bo->hal_format = gr_handle->format;
+
+#if GRALLOC_HANDLE_VERSION < 4
+ static std::once_flag once;
+ std::call_once(once, []() {
+ ALOGE(
+ "libdrm < v2.4.97 has broken gralloc_handle structure. Please update.");
+ });
+#endif
+#if GRALLOC_HANDLE_VERSION == 4
+ bo->modifiers[0] = gr_handle->modifier;
+ bo->with_modifiers = gr_handle->modifier != DRM_FORMAT_MOD_NONE &&
+ gr_handle->modifier != DRM_FORMAT_MOD_INVALID;
+#endif
+
+ bo->usage = gr_handle->usage;
+ bo->prime_fds[0] = gr_handle->prime_fd;
+
+ if (is_yuv(gr_handle->format)) {
+ if (!GetYuvPlaneInfo(handle->numFds, handle, bo))
+ return -EINVAL;
+ } else {
+ bo->pitches[0] = gr_handle->stride;
+ bo->offsets[0] = 0;
+ bo->format = ConvertHalFormatToDrm(gr_handle->format);
+ if (bo->format == DRM_FORMAT_INVALID)
+ return -EINVAL;
+ }
+
+ bo->pixel_stride = (gr_handle->stride * 8) /
+ DrmFormatToBitsPerPixel(bo->format);
+
+ return 0;
+}
+
+} // namespace android