Hi Folks
Attached is the repost of the davinci_fb_rgb_config function that we used to
run a DVI display at 1024x768 using the davinci.
static void davincifb_rgb_config(int on)
{
DBGENTER;
char data[10];
char temp[20];
unsigned int hsync,hactive,hfront,hback;
unsigned int vsync,vactive,vfront,vback;
unsigned int hint,vint;
int notfound=1;
memset(temp,0,sizeof(temp));
memset(data,0,sizeof(data));
printk("** Configuring for RGB Video Mode\r\n");
if (on) {
/* Reset video encoder module */
dispc_reg_out(VENC_VMOD, 0);
dispc_reg_out(VENC_VMOD,0x2013); // start video encoder in
RGB mode
dispc_reg_out(VENC_VIDCTL,0x2000); // enable video clock
output
dispc_reg_out(VENC_SYNCCTL,0x000F); // hsync + vsync are on
active low polarity
dispc_reg_out(VENC_DCLKCTL,0x0800);
dispc_reg_out(VENC_DCLKPTN0,0x0001);
dispc_reg_out(VPSS_CLKCTL,0x0009);
// generate 63MHz DCLK
dispc_reg_out(VPSS_PLLDIV1,0x0009);
dispc_reg_out(VPSS_PLLDIV1,0x8009);
/*
// standard video modes
CLK
640x480, 60Hz 25.175 640 16 96 48 480 11 2
31
640x480, 72Hz 31.500 640 24 40 128 480 9 3
28
640x480, 75Hz 31.500 640 16 96 48 480 11 2
32
640x480, 85Hz 36.000 640 32 48 112 480 1 3
25
800x600, 56Hz 38.100 800 32 128 128 600 1 4
14
800x600, 60Hz 40.000 800 40 128 88 600 1 4
23
800x600, 72Hz 50.000 800 56 120 64 600 37 6
23
800x600, 75Hz 49.500 800 16 80 160 600 1 2
21
800x600, 85Hz 56.250 800 32 64 152 600 1 3
27
1024x768, 60Hz 65.000 1024 24 136 160 768 3 6
29
1024x768, 70Hz 75.000 1024 24 136 144 768 3 6
29
*/
// horizontal sync pulse width
hsync=135;
hactive=1024;
hfront=24;
hback=160;
vactive=768;
vsync=20;
vfront=3;
vback=10;
hint=hsync+hactive+100; // pad so we can slide the LCD_OE so we can make
sure we catch all the CTL signals
vint=vsync+vactive;
hfront=hfront+hsync;
dispc_reg_out(VENC_HSPLS,hsync);
dispc_reg_out(VENC_HINT,hint);
dispc_reg_out(VENC_HSTART,hfront);
dispc_reg_out(VENC_HVALID,hactive);
dispc_reg_out(VENC_VSPLS,vsync);
dispc_reg_out(VENC_VINT,vint);
dispc_reg_out(VENC_VSTART,vfront);
dispc_reg_out(VENC_VVALID,vactive);
dispc_reg_out(VENC_HSDLY,0);
dispc_reg_out(VENC_VSDLY,0);
// crazy part#1000
// these registers are barely documented but they are
// key to keeping the OSD module and the VENC module synced
// set these bits to basically NOT-GATE the OSD clock
dispc_reg_out(VENC_OSDCLK0,0xffff);
dispc_reg_out(VENC_OSDCLK1,0xffff);
dispc_reg_out(VENC_OSDHAD,50); // advance the timing? why
not
// dont cull anything!
dispc_reg_out(VENC_HVLDCL0,0xffffffff);
dispc_reg_out(VENC_HVLDCL1,0xffffffff);
dispc_reg_out(VENC_LCDOUT,0x0001); // enable LCD_OE to
active high
dispc_reg_out(VENC_RGBCTL,0); // stadnard RGB output
printk ("Seeking TFP410 DVI Encoder....\r\n");
// get device ID register
data[0]=0x00;
davinci_i2c_write (1, data, TFP410);
davinci_i2c_read (2, temp, TFP410);
printk("*** Device ID = 0x%02x%02x\r\n",temp[0],temp[1]);
if (temp[0]==0x10 && temp[1]==0x04)
{
printk("Located TFP410....\r\n");
notfound=0;
}
else
{
printk("TFP410 not found...critical fault....\r\n");
// while(1)
// {
// }
}
printk("Configuring TFP410 Interface device\r\n");
data[0]=0x08; // select CTL_1
data[1]=0x07;
davinci_i2c_write (2, data, TFP410);
// generate color bars
// dispc_reg_out(VENC_VDPRO,0x0100);
/* Enable Composite output and start video encoder */
// dispc_reg_out(VENC_VMOD, (VENC_VMOD_VIE | VENC_VMOD_VENC));
/* Set REC656 Mode */
// dispc_reg_out(VENC_YCCCTL, 0x1);
/* Enable output mode and NTSC */
// dispc_reg_out(VENC_VMOD, 0x1003);
/* Enable Component output; DAC A: Y, DAC B: Pb, DAC C: Pr
*/
// dispc_reg_out(VENC_DACSEL, 0x543);
/* Enable all DACs */
// dispc_reg_out(VENC_DACTST, 0);
} else {
/* Reset video encoder module */
dispc_reg_out(VENC_VMOD, 0);
}
DBGEXIT;
}
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Etienne Gauthier
Sent: Monday, January 29, 2007 8:10 AM
To: [email protected]
Subject: ### RGB Via Davinci
Hi Steve,
I went on www.fl-eng.com to look for info for the davinci. But I didn't
see any. I'm actually trying also to do 800x600 60Hz rgb witht the
davinci. I tried your code but I need to know at what value you have
configured VPSS_PPL2_PM. Looking at your code it seems to be 20 since
63Hz = (21 x 27Hz) / 9. I just want to make sure.
Thanks
Etienne Gauthier
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