From mboxrd@z Thu Jan  1 00:00:00 1970
From: jiujin.hong@mid-fun.com (tommy)
Date: Fri, 06 Nov 2009 15:51:36 +0800
Subject: Suggestion:S3C64XX and next-S3C MFC need IOCTL_MFC_RESET ?
Message-ID: <1257493896.21338.1.camel@tommy-desktop>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

hi,emailist!
  
  I think S3C64XX and next-s3c MFC driver need IOCTL_MFC_RESET,because
if APP unlegal exit mfc operation or MFC met some uncorrect
h264/mpeg4/vc1/wmv9 media stream,can cause MFC inter unit become
uncorrect state,it need RESET to recover to work for next!When under
that uncorrect condition,APP must use ioctl_MFC_RESET to recover!

 i have test it ,also OK even met uncorrect stream and unlegal app file
descriptor exit !



patch may be similiar as following:

               /*For MFC RESET,when met uncorrect stram or unlegal file
descriptor exit ,for APP engineer*/
                case IOCTL_MFC_RESET:
                        MFC_Mutex_Lock();
          
                        MFC_HW_Init(); /*RESET MFC,download
firmware ,reset mfc busy flag*/

                        MFC_Mutex_Release();
                        break;


Tommy at China