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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "hwc-platform-drm-generic"
     18 
     19 #include "drmresources.h"
     20 #include "platform.h"
     21 #include "platformdrmgeneric.h"
     22 
     23 #include <drm/drm_fourcc.h>
     24 #include <xf86drm.h>
     25 #include <xf86drmMode.h>
     26 
     27 #include <cutils/log.h>
     28 #include <gralloc_drm.h>
     29 #include <gralloc_drm_priv.h>
     30 #include <gralloc_drm_handle.h>
     31 #include <hardware/gralloc.h>
     32 
     33 namespace android {
     34 
     35 #ifdef USE_DRM_GENERIC_IMPORTER
     36 // static
     37 Importer *Importer::CreateInstance(DrmResources *drm) {
     38   DrmGenericImporter *importer = new DrmGenericImporter(drm);
     39   if (!importer)
     40     return NULL;
     41 
     42   int ret = importer->Init();
     43   if (ret) {
     44     ALOGE("Failed to initialize the nv importer %d", ret);
     45     delete importer;
     46     return NULL;
     47   }
     48   return importer;
     49 }
     50 #endif
     51 
     52 DrmGenericImporter::DrmGenericImporter(DrmResources *drm) : drm_(drm) {
     53 }
     54 
     55 DrmGenericImporter::~DrmGenericImporter() {
     56 }
     57 
     58 int DrmGenericImporter::Init() {
     59   int ret = hw_get_module(GRALLOC_HARDWARE_MODULE_ID,
     60                           (const hw_module_t **)&gralloc_);
     61   if (ret) {
     62     ALOGE("Failed to open gralloc module");
     63     return ret;
     64   }
     65   return 0;
     66 }
     67 
     68 uint32_t DrmGenericImporter::ConvertHalFormatToDrm(uint32_t hal_format) {
     69   switch (hal_format) {
     70     case HAL_PIXEL_FORMAT_RGB_888:
     71       return DRM_FORMAT_BGR888;
     72     case HAL_PIXEL_FORMAT_BGRA_8888:
     73       return DRM_FORMAT_ARGB8888;
     74     case HAL_PIXEL_FORMAT_RGBX_8888:
     75       return DRM_FORMAT_XBGR8888;
     76     case HAL_PIXEL_FORMAT_RGBA_8888:
     77       return DRM_FORMAT_ABGR8888;
     78     case HAL_PIXEL_FORMAT_RGB_565:
     79       return DRM_FORMAT_BGR565;
     80     case HAL_PIXEL_FORMAT_YV12:
     81       return DRM_FORMAT_YVU420;
     82     default:
     83       ALOGE("Cannot convert hal format to drm format %u", hal_format);
     84       return -EINVAL;
     85   }
     86 }
     87 
     88 int DrmGenericImporter::ImportBuffer(buffer_handle_t handle, hwc_drm_bo_t *bo) {
     89   gralloc_drm_handle_t *gr_handle = gralloc_drm_handle(handle);
     90   if (!gr_handle)
     91     return -EINVAL;
     92 
     93   struct gralloc_drm_bo_t *gralloc_bo = gr_handle->data;
     94   if (!gralloc_bo) {
     95     ALOGE("Could not get drm bo from handle");
     96     return -EINVAL;
     97   }
     98 
     99   uint32_t gem_handle;
    100   int ret = drmPrimeFDToHandle(drm_->fd(), gr_handle->prime_fd, &gem_handle);
    101   if (ret) {
    102     ALOGE("failed to import prime fd %d ret=%d", gr_handle->prime_fd, ret);
    103     return ret;
    104   }
    105 
    106   memset(bo, 0, sizeof(hwc_drm_bo_t));
    107   bo->width = gr_handle->width;
    108   bo->height = gr_handle->height;
    109   bo->format = ConvertHalFormatToDrm(gr_handle->format);
    110   bo->pitches[0] = gr_handle->stride;
    111   bo->gem_handles[0] = gem_handle;
    112   bo->offsets[0] = 0;
    113 
    114   ret = drmModeAddFB2(drm_->fd(), bo->width, bo->height, bo->format,
    115                       bo->gem_handles, bo->pitches, bo->offsets, &bo->fb_id, 0);
    116   if (ret) {
    117     ALOGE("could not create drm fb %d", ret);
    118     return ret;
    119   }
    120 
    121   return ret;
    122 }
    123 
    124 int DrmGenericImporter::ReleaseBuffer(hwc_drm_bo_t *bo) {
    125   if (bo->fb_id)
    126     if (drmModeRmFB(drm_->fd(), bo->fb_id))
    127       ALOGE("Failed to rm fb");
    128 
    129   struct drm_gem_close gem_close;
    130   memset(&gem_close, 0, sizeof(gem_close));
    131   int num_gem_handles = sizeof(bo->gem_handles) / sizeof(bo->gem_handles[0]);
    132   for (int i = 0; i < num_gem_handles; i++) {
    133     if (!bo->gem_handles[i])
    134       continue;
    135 
    136     gem_close.handle = bo->gem_handles[i];
    137     int ret = drmIoctl(drm_->fd(), DRM_IOCTL_GEM_CLOSE, &gem_close);
    138     if (ret)
    139       ALOGE("Failed to close gem handle %d %d", i, ret);
    140     else
    141       bo->gem_handles[i] = 0;
    142   }
    143   return 0;
    144 }
    145 
    146 #ifdef USE_DRM_GENERIC_IMPORTER
    147 std::unique_ptr<Planner> Planner::CreateInstance(DrmResources *) {
    148   std::unique_ptr<Planner> planner(new Planner);
    149   planner->AddStage<PlanStageGreedy>();
    150   return planner;
    151 }
    152 #endif
    153 }
    154