求助：OV2640yuv进预览很慢

      各位朋友，小弟遇到OV2640 YUV格式，进摄像头预览，会先黑20秒左右，才能进去，同一份代码，HI253 YUV的就正常，都是2M的，抓log看OV2640，输出信息如下：
[   22.741173] [ASP] 0x22, 0x22
[   22.741525] [ASP] ROM INFO is found
[   22.741955] 0x41,0x33,0x31,0x32,
[   22.742352] [AES_EXPORT] Legacy
[   22.742808] 0x39,0x32,0x41,0x41,
[   22.743209] 0x22, NSC
[   23.099646] [MDPK] [MDPK E]: MT6575_WAIT_IRQ(): ../mediatek/platform/mt6575/kernel/core/mt6575_mdp.c@1515: Wait Done Timeout！ PID:445  DoneTbl:0x00000000  WaitFlag:0x00020000  timeout:3000
[   23.905261] [BLOCK_TAG] Fsync statistic in timeline 21575643692
[   23.905988] [BLOCK_TAG] Fsync [(PID):cnt] -- ( 418):6 ( 419):6
[   25.129592] [BLOCK_TAG] MMC Queue Thread:64, 0, 0, 0, 0
[   25.130244] [BLOCK_TAG] MMC CID: 7fffff31 32333220 10000029 9800ac5d
[   25.131046] [BLOCK_TAG] mmcqd:64 Workload=11%, duty 352808231, period 3009803000, req_cnt=1
[   25.132096] [BLOCK_TAG] mmcqd:64 Write Throughput=2 kB/s, size: 1024 bytes, time:352 ms
[   25.998463] [BLOCK_TAG] mmcqd:64 Workload=1%, duty 11963077, period 868861900, req_cnt=1
[   25.999477] [BLOCK_TAG] mmcqd:64 Write Throughput=46 kB/s, size: 512 bytes, time:11 ms
[   26.029608] [MDPK] [MDPK E]: MT6575_WAIT_IRQ(): ../mediatek/platform/mt6575/kernel/core/mt6575_mdp.c@1515: Wait Done Timeout！ PID:445  DoneTbl:0x00000000  WaitFlag:0x00020000  timeout:3000
[   26.638199] [power/AlARM] alarm 0 set 1262383637.441000000
[   28.959573] [MDPK] [MDPK E]: MT6575_WAIT_IRQ(): ../mediatek/platform/mt6575/kernel/core/mt6575_mdp.c@1515: Wait Done Timeout！ PID:445  DoneTbl:0x00000000  WaitFlag:0x00020000  timeout:3000
[   28.975911] [BLOCK_TAG] Fsync statistic in timeline 23905242153
[   28.976639] [BLOCK_TAG] Fsync [(PID):cnt] -- ( 425):1
[   30.476612] [Power/Battery] [FGADC] 1,3,0,0,3890,67,67,67,1135,1135,0,0,0,1000,0,3904,1000,33,33,3,104,103
[   30.478003] mt_usb_disconnect 256: [MUSB] USB is ready for disconnect
[   30.528472] [Power/Battery] [BATTERY:AVG] BatTemp:25 Vbat:3895 VBatSen:3904 SOC:70 ChrDet:0 Vchrin:77 Icharging:0 ChrType:0 USBstate:1 gADC_I_SENSE_offset:-14
[   33.379445] [BLOCK_TAG] Fsync statistic in timeline 28975893307
[   33.380197] [BLOCK_TAG] Fsync [(PID):cnt] -- ( 587):1
[   36.109589] [MDPK] [MDPK E]: MT6575_WAIT_IRQ(): ../mediatek/platform/mt6575/kernel/core/mt6575_mdp.c@1515: Wait Done Timeout！ PID:445  DoneTbl:0x00000000  WaitFlag:0x00020000  timeout:3000
[   39.039569] [MDPK] [MDPK E]: MT6575_WAIT_IRQ(): ../mediatek/platform/mt6575/kernel/core/mt6575_mdp.c@1515: Wait Done Timeout！ PID:445  DoneTbl:0x00000000  WaitFlag:0x00020000  timeout:3000
[   40.478517] [Power/Battery] [FGADC] 0,1,0,0,3890,67,67,67,1135,1135,0,0,0,1000,0,3904,1000,33,33,1,104,103
[   40.479935] mt_usb_disconnect 256: [MUSB] USB is ready for disconnect
[   40.529837] [Power/Battery] [BATTERY:AVG] BatTemp:25 Vbat:3896 VBatSen:3909 SOC:70 ChrDet:0 Vchrin:77 Icharging:0 ChrType:0 USBstate:1 gADC_I_SENSE_offset:-14
[   41.689580] 2010-01-01 00:06:32.504480 UTC; android time 2010-01-01 00:06:32.504480
[   41.969571] [MDPK] [MDPK E]: MT6575_WAIT_IRQ(): ../mediatek/platform/mt6575/kernel/core/mt6575_mdp.c@1515: Wait Done Timeout！ PID:445  DoneTbl:0x00000000  WaitFlag:0x00020000  timeout:3000
[   46.929461] [mtkfb_ioctl]MTKFB_REGISTER_OVERLAYBUFFER
[   46.930134] [mtkfb_ioctl] before add a node,list node Addr:
请教下这是什么情况

MT6575_WAIT_IRQ(): 这个是什么?

真是悲催，第一批送来调试的3个都有这个问题，第二批的四个都是好的，应该是打样问题吧

只能说奇怪。我觉得有可能是你的电压没有设置对吧?