vga输出 1440x900 分辨率问题

eagle_lzt · December 11, 2014, 1:33am

板子买了好久，终于有时间调试一下了。首先分辨率适配问题，从驱动里面发现firefly把常见的分辨率模式基本都加入进去了。
在这里赞一个。
我跑的linux，后来发现不管用哪个显示器都是1920x1080，随即研究代码后，修改lcd-box.dtsi，终于和我的
1440x900分辨率匹配了，但是高兴地太早了，显示的很模糊，fbset一看是16位的，随即又研究代码，将framebuffer驱动默认
bpp改成了32位，心想这下ok了，但是高兴的又太早了，一看还是显示的不清晰，但是fbset显示的都是正确的，郁闷，随即查看
显示器的参数，结果一看明白了：fbset显示的是1440x900 32位，但是显示器接收到的是1152x900. 怪不得字体什么的模糊！原来
不是最佳的，而且垂直刷新率66Hz，但是驱动参数里设置都是按照60设置的。
后来又换了一个1600x900的显示器，将板子输出调成1600x900, 结果显示效果很完美，很稳定。但是显示器接收到的垂直刷新率
是65Hz.
所以问题来了，1400x900为什么成了1152x900，1440x900和1600x900的垂直刷新率为啥不是60，而是60+

硬件：t-firefly rk3288 正式版
kernel： linux 3.10.37
rootfs：自带lubuntu

  望firefly的大牛帮忙看看，调调，我好及时做好demo给客户看，谢谢了！

有图有真相：

zhansb · December 11, 2014, 7:15am

把/class/graphics/fb0/screen_info发出来看看

eagle_lzt · December 11, 2014, 11:37am

zhansb 发表于 2014-12-11 15:15
把/class/graphics/fb0/screen_info发出来看看

/class/graphics/fb0/screen_info
z-order:
layer3_sel_win[3]
layer2_sel_win[2]
layer1_sel_win[1]
layer0_sel_win[0]
win0:
state:0, fmt:ARGB888, y_vir:320, uv_vir:320
xact: 320, yact: 240, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0
y_h_fac: 4096, y_v_fac: 4096, uv_h_fac: 4096, uv_v_fac: 4096
y_addr: 0x00000000, uv_addr:0x00000000
win1:
state:1, fmt:ARGB888, y_vir:1440, uv_vir:4192
xact:1440, yact: 900, dsp_x:1440, dsp_y: 900, x_st: 0, y_st: 0
y_h_fac: 4096, y_v_fac: 4096, uv_h_fac: 4096, uv_v_fac: 4096
y_addr: 0x10000000, uv_addr:0x00000000
win2:
state:0
fmt:ARGB888
area0: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area1: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area2: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area3: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
win3:
state:0
fmt:ARGB888
area0: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area1: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0 addr:0x00000000
area2: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area3: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000

cat /sys/class/display/display0.VGA/mode
1440x900p-60

eagle_lzt · December 11, 2014, 11:37am

zhansb 发表于 2014-12-11 15:15
把/class/graphics/fb0/screen_info发出来看看

/class/graphics/fb0/screen_info
z-order:
layer3_sel_win[3]
layer2_sel_win[2]
layer1_sel_win[1]
layer0_sel_win[0]
win0:
state:0, fmt:ARGB888, y_vir:320, uv_vir:320
xact: 320, yact: 240, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0
y_h_fac: 4096, y_v_fac: 4096, uv_h_fac: 4096, uv_v_fac: 4096
y_addr: 0x00000000, uv_addr:0x00000000
win1:
state:1, fmt:ARGB888, y_vir:1440, uv_vir:4192
xact:1440, yact: 900, dsp_x:1440, dsp_y: 900, x_st: 0, y_st: 0
y_h_fac: 4096, y_v_fac: 4096, uv_h_fac: 4096, uv_v_fac: 4096
y_addr: 0x10000000, uv_addr:0x00000000
win2:
state:0
fmt:ARGB888
area0: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area1: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area2: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area3: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
win3:
state:0
fmt:ARGB888
area0: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area1: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0 addr:0x00000000
area2: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area3: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000

cat /sys/class/display/display0.VGA/mode
1440x900p-60

eagle_lzt · December 11, 2014, 11:39am

zhansb 发表于 2014-12-11 15:15
把/class/graphics/fb0/screen_info发出来看看

/class/graphics/fb0/screen_info
z-order:
layer3_sel_win[3]
layer2_sel_win[2]
layer1_sel_win[1]
layer0_sel_win[0]
win0:
state:0, fmt:ARGB888, y_vir:320, uv_vir:320
xact: 320, yact: 240, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0
y_h_fac: 4096, y_v_fac: 4096, uv_h_fac: 4096, uv_v_fac: 4096
y_addr: 0x00000000, uv_addr:0x00000000
win1:
state:1, fmt:ARGB888, y_vir:1440, uv_vir:4192
xact:1440, yact: 900, dsp_x:1440, dsp_y: 900, x_st: 0, y_st: 0
y_h_fac: 4096, y_v_fac: 4096, uv_h_fac: 4096, uv_v_fac: 4096
y_addr: 0x10000000, uv_addr:0x00000000
win2:
state:0
fmt:ARGB888
area0: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area1: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area2: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area3: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
win3:
state:0
fmt:ARGB888
area0: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area1: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0 addr:0x00000000
area2: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000
area3: state:0, y_vir: 320, dsp_x: 320, dsp_y: 240, x_st: 0, y_st: 0, addr:0x00000000

cat /sys/class/display/display0.VGA/mode
1440x900p-60

crazycat · February 3, 2015, 4:20pm

我先前也有改過VGA , 強迫輸出 1024x768 or 1280x720 如下 ..
另外PAD版本可以用VGA嗎 ? 我有VGA需求在PAD板上改

const struct fb_videomode sda7123_vga_mode = {
//name refresh xres yres pixclock h_bp h_fp v_bp v_fp h_pw v_pw polariry PorI flag(used for vic)
{“1024x768p@60Hz”, 60, 1024, 768, 65000000, 160, 24, 29, 3, 136, 6, 0, 0, 0 },
{“1280x720p@60Hz”, 60, 1280, 720, 74250000, 220, 110, 20, 5, 40, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
// {“1280x1024p@60Hz”, 60, 1280, 1024, 108000000, 248, 48, 38, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 6 },
// {“1366x768p@60Hz”, 60, 1366, 768, 85500000, 213, 70, 24, 3, 143, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 0, 0 },
};

zhansb · February 4, 2015, 1:08am

crazycat 发表于 2015-2-4 00:20
我先前也有改過VGA , 強迫輸出 1024x768 or 1280x720 如下 ..
另外PAD版本可以用VGA嗎 ? 我有VGA需求在PAD …

PAD版的接下来我们会加上去，敬请期待:victory:

danzuiji · March 24, 2015, 9:38am

楼主，你的问题解决没有？我的也是，不过有一个分辨率和频率可以匹配。显示感觉还是有问题。

zhanlie507 · April 25, 2015, 1:26pm

楼主，问题解决了么，我的显示还是看的头晕

eagle_lzt · April 27, 2015, 1:59am

zhanlie507 发表于 2015-4-25 21:26
楼主，问题解决了么，我的显示还是看的头晕

1600x900可以的，1440x900还是那样，显示的是1152x900.

suky8 · August 26, 2015, 8:43am

eagle_lzt 发表于 2015-4-27 09:59
1600x900可以的，1440x900还是那样，显示的是1152x900.

请问你的问题解决了吗，我想请教一下，我想加入HDMI能有1920*1200P60输出，我应该怎么做呢，麻烦了

spiderh · August 27, 2015, 1:10am

zhansb 发表于 2014-12-11 15:15
把/class/graphics/fb0/screen_info发出来看看

这个问题解决了没有？
在android也会有类似的问题。
以1440x900
是因为在文件 /kernel/drivers/video/rockchip/lcdc/rk3288_lcdc.c 的方法rk3288_lcdc_set_dclk中
ret = clk_set_rate(lcdc_dev->dclk, screen->mode.pixclock);
这一句，不管pixclock设置是10800000 还是 106500000 clk_get_rate 所返回的值都是 118000000。
这样就导致1440x900分辨率下timing错乱，输出分辨率为1152x900,刷新率成了67。
该问题在hdmi其实都一样，刷新率也是67的，只不过hdmi能修正为1440x900的显示而已。
clk的设置以及返回一点都不懂，请问这个地方该怎么做。

F_phoenix · November 16, 2015, 5:38am

楼主，请问你的linux平台下VGA的分辨率问题搞定没？

hongyin · March 9, 2016, 9:15am

你好，请问修改framebuffer默认bpp的地方在哪？

biaoun · June 2, 2016, 2:59pm

spiderh 发表于 2015-8-27 09:10
这个问题解决了没有？
在android也会有类似的问题。
以1440x900

你的这个问题解决了吗？我在android遇到同样的问题，时钟修改不了

746277441 · June 29, 2016, 12:22pm

你好，请问修改framebuffer默认bpp的地方在哪？