TI中文支持网各位大侠，请教一个问题哦？
开发板SEED-DVS365 (CPU是DM365)方案是支持分辨率为800X480的LCD屏幕，从CPU送出来的是PRGB格式的数字信号。现在因为需求改动，需要支持分辨率1366X768的LCD屏幕。请问，这个DM365支持吗？如果支持，大致应该怎么修改代码哦？需要修改驱动吗？还是直接改应用程序就OK了？
求各位大侠指导指导？不胜感激：）
Eason Wang：
216MHz主频的365就支持不到了，因为其pixel clk最高是到27MHz的，不够。
其他器件都嫩到74.25MHz的。 驱动方面大致也就是围绕时钟的配置来做的
shen ruiting：
主频是300MHZ，只需要改时钟吗？我修改了vencrate_sd，也没用，还是白屏？请问具体要怎么修改？
Eason Wang：
除了时钟，至少还要改行场同步
shen ruiting：
改动如下
static struct logicpd_encoder_config logicpd_encoder_configuration = {
.no_of_outputs = LOGICPD_ENCODER_MAX_NO_OUTPUTS,
.output[0] = {
.output_name = VID_ENC_OUTPUT_LCD,
.no_of_standard = LOGICPD_ENCODER_GRAPHICS_NUM_STD,
.standards[0] = {
.name = VID_ENC_STD_800x480,//VID_ENC_STD_640x480,
.std = 1,
.if_type = VID_ENC_IF_PRGB,
.interlaced = 0,
.xres = 1366, //800,//640,
.yres = 768, //480,
.fps ={60, 1},// {60, 1},
.left_margin = 85,
.right_margin = 70,
.upper_margin = 32,
.lower_margin = 11,
.hsync_len = 9,
.vsync_len = 9,
.flags = 0}, /* hsync -ve, vsync -ve */
发现程序运行起来后，KERNEL报空间不足：
[ 0.280000] Console: switching to colour frame buffer device 170×48
[ 0.350000] davincifb davincifb.0: dm_osd0_fb: 1366x768x16@0,0 with framebuffer size 6192KB
[ 0.410000] davincifb davincifb.0: dm_vid0_fb: 0x0x16@0,0 with framebuffer size 9288KB
[ 0.460000] davincifb davincifb.0: dm_osd1_fb: 1366x768x4@0,0 with framebuffer size 6192KB
[ 0.520000] davincifb davincifb.0: dm_vid1_fb: 0x0x16@0,0 with framebuffer size 9288KB
[ 0.560000] DAVINCI-WDT: DaVinci Watchdog Timer: heartbeat 60 sec
[ 0.570000] == dm365_pwm_init:e800000
[ 0.570000] MUX: initialized PWM1_G25
[ 0.570000] Serial: 8250/16550 driver $Revision: 1.90 $ 2 ports, IRQ sharing disabled
[ 0.570000] serial8250.0: ttyS0 at MMIO map 0x1c20000 mem 0xfbc20000 (irq = 40) is a 16550A
[ 0.570000] === serial_dl_write 40:d
[ 0.580000] serial8250.0: ttyS1 at MMIO map 0x1d06000 mem 0xfbd06000 (irq = 41) is a 16550A
[ 0.590000] Linux video capture interface: v2.00
[ 0.590000] vpfe_init
[ 0.600000] starting ccdc_reset…<7>
[ 0.600000] End of ccdc_reset…<5>vpfe_probe
[ 0.610000] TVP5150 : nummber of channels = 1
[ 0.610000] vpfe ccdc capture vpfe ccdc capture.1: vpif_register_decoder: decoder = TVP5150
[ 0.620000] oom-killer: gfp_mask=0xd1, order=10
[ 0.630000] Mem-info:
[ 0.630000] DMA per-cpu:
[ 0.630000] cpu 0 hot: high 18, batch 3 used:2
[ 0.640000] cpu 0 cold: high 6, batch 1 used:0
[ 0.640000] DMA32 per-cpu: empty
[ 0.640000] Normal per-cpu: empty
[ 0.650000] HighMem per-cpu: empty
[ 0.650000] Free pages: 21880kB (0kB HighMem)
[ 0.660000] Active:0 inactive:0 dirty:0 writeback:0 unstable:0 free:5470 slab:166 mapped:0 pagetables:0
[ 0.670000] DMA free:21880kB min:1144kB low:1428kB high:1716kB active:0kB inactive:0kB present:81920kB pages_scanned:0 all_unreclaimable? no
[ 0.680000] lowmem_reserve[]: 0 0 0 0
[ 0.680000] DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
[ 0.690000] lowmem_reserve[]: 0 0 0 0
[ 0.700000] Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
[ 0.710000] lowmem_reserve[]: 0 0 0 0
[ 0.710000] HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
[ 0.720000] lowmem_reserve[]: 0 0 0 0
[ 0.730000] DMA: 0*4kB 10*8kB 16*16kB 8*32kB 5*64kB 8*128kB 8*256kB 9*512kB 3*1024kB 5*2048kB 0*4096kB 0*8192kB 0*16384kB = 21904kB
[ 0.740000] DMA32: empty
[ 0.740000] Normal: empty
[ 0.750000] HighMem: empty
[ 0.750000] Swap cache: add 0, delete 0, find 0/0, race 0+0
[ 0.750000] Free swap = 0kB
[ 0.760000] Total swap = 0kB
[ 0.760000] Free swap: 0kB
[ 0.770000] 20480 pages of RAM
[ 0.770000] 5497 free pages
[ 0.770000] 14697 reserved pages
[ 0.780000] 166 slab pages
[ 0.780000] 0 pages shared
[ 0.780000] 0 pages swap cached
[ 0.790000] Out of Memory: Kill process 2 (posix_cpu_timer) score 0 and children.
[ 0.790000] Out of Memory: Kill process 2 (posix_cpu_timer) score 0 and children.
[ 0.800000] Out of Memory: Kill process 2 (posix_cpu_timer) score 0 and children.
[ 0.810000] Out of Memory: Kill process 2 (posix_cpu_timer) score 0 and children.
[ 0.820000] Out of Memory: Kill process 2 (posix_cpu_timer) score 0 and children.
[ 0.820000] Out of Memory: Kill process 2 (posix_cpu_timer) score 0 and children.
shen ruiting：
后来，我修改了mem的大小。如下所示，把80M改为120M.
setenv bootargs mem=120M console=ttyS0,115200n8 root=/dev/mtdblock3 rootfstype=jffs2 noinitrd rw init=/linuxrc davinci_enc_mngr.ch0_output=LCD davinci_capture.device_type=4 dm365_imp.oper_mode=0 mtdparts=physmap-flash.0:384K(bootloader),128K(params),2M(kernel),12M(jffs2) time lpj=741376
这样子，就不会报空间不足的错误，程序可以往下正常运行了。不过，还是无法正常显示，仍然是白屏，且有时候变红，有时候变绿，变来变去的。
Eason Wang：
你本来给到屏幕的是个什么样的东西呢？有没有按照屏的SPEC要求的时序来配置你代码里面出现的参数？这个都是可以用示波器来量出来的。
shen ruiting：
本来给屏幕的是分辨率为800X480的PRGB格式的数据。现在屏幕改为1366X768分辨率了。
请问，您的邮箱地址或QQ号码是多少？我把LCD屏的资料发给你。因为我看LCD屏资料，并没有特别指明场同步之类的参数。只有分辨率和CLK参数。
Eason Wang：
这个论坛可以发附件的。
此外，同步信号的极性等都是需要考虑的
建议你无论如何还是先用示波器量一下有没有这些个信号
Feng Dong：
你的问题很大可能是H sync和V sync的极性两边不匹配.
shen ruiting：
根据我对文档的理解
我设置的VCLK是81MHZ，HSYNC的周期是(1366+96+98)/81，即19.25us。VSYNC周期是19.25us*(768+32+11)，即15.611ms。
如下所示：
static struct logicpd_encoder_config logicpd_encoder_configuration = { .no_of_outputs = LOGICPD_ENCODER_MAX_NO_OUTPUTS, .output[0] = { .output_name = VID_ENC_OUTPUT_LCD, .no_of_standard = LOGICPD_ENCODER_GRAPHICS_NUM_STD, .standards[0] = { .name = VID_ENC_STD_800x480,//VID_ENC_STD_640x480, .std = 1, .if_type = VID_ENC_IF_PRGB, .interlaced = 0, .xres = 1366, //800,//640, .yres = 768, //480, .fps ={60, 1},// {60, 1}, .left_margin = 96, .right_margin = 98, .upper_margin = 32, .lower_margin = 11, .hsync_len = 9, .vsync_len = 9, .flags = 0}, /* hsync -ve, vsync -ve */
实际抓出来的hsync,vsync,vclk也跟理论上设置的值一致。
至于hsync,vsync的极性，也如文档（如果我对文档的理解没有错的话），默认为高电平，即极性为高电平。
