1 /* 2 // Copyright (c) 2014 Intel Corporation 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 #include <HwcTrace.h> 18 #include <linux/psb_drm.h> 19 #include <Hwcomposer.h> 20 #include <common/DrmControl.h> 21 22 namespace android { 23 namespace intel { 24 DrmControl()25DrmControl::DrmControl() 26 : mVideoExtCommand(0) 27 { 28 } 29 ~DrmControl()30DrmControl::~DrmControl() 31 { 32 } 33 getVideoExtCommand()34int DrmControl::getVideoExtCommand() 35 { 36 if (mVideoExtCommand) { 37 return mVideoExtCommand; 38 } 39 40 int fd = Hwcomposer::getInstance().getDrm()->getDrmFd(); 41 42 union drm_psb_extension_arg video_getparam_arg; 43 strncpy(video_getparam_arg.extension, 44 "lnc_video_getparam", sizeof(video_getparam_arg.extension)); 45 int ret = drmCommandWriteRead(fd, DRM_PSB_EXTENSION, 46 &video_getparam_arg, sizeof(video_getparam_arg)); 47 if (ret != 0) { 48 VTRACE("failed to get video extension command"); 49 return 0; 50 } 51 52 mVideoExtCommand = video_getparam_arg.rep.driver_ioctl_offset; 53 54 return mVideoExtCommand; 55 } 56 57 } // namespace intel 58 } // namespace android 59