intel SDVO TV-out

[Zhang, Xiaolin]

Hi, 

For the SDVO TV-out support, I done this work Nov. last year under X and DRM (fb driver to support SDVO TV-out) for Intel poulsbo graphics driver. The attached patch is only for xf86-video-intel-2.2.1. Actually, I don't have the machine to test the patch, but I think you may just need a littlte modification. Hope it works for you. 

BRs
Xiaolin


-----Original Message-----
From: xorg-bounces at lists.freedesktop.org [mailto:xorg-bounces at lists.freedesktop.org] On Behalf Of Will .
Sent: 2008年4月13日 23:17
To: Eric Anholt
Cc: xorg at lists.freedesktop.org
Subject: RE: intel SDVO TV-out


> I pushed a partially cleaned up version to
> git://people.freedesktop.org/~anholt/xf86-video-intel on the branch
> sdvo-tv-wil

Here's a few things you might try to get it working...

Add your encoder to the list at the top of i830_sdvo.c with I830_SDVO_CHIP_TVOUT
The xorg.log should confirm it was detected

const static struct i830_sdvo_card i830_sdvo_cards[] =
{
    /** 0x02 = 'Chrontel'*/
    {0x02,0x3C,I830_SDVO_CHIP_TMDS,"Chrontel CH7307"},
    {0x02,0xC2,I830_SDVO_CHIP_TVOUT,"Chrontel CH7021"}
};
-------------------------------------------------------------------------
Change your tvout connector in i830_sdvo_init (bottom of i830_sdvo.c), auto detect may work for you but it doesn't  detect my ouput properly (although the hardware is capable).

    if(dev_priv->encoder_type==I830_SDVO_CHIP_TVOUT)
    {
        /* i830_sdvo_reset_device(output);*/
        memset(&dev_priv->tv_out,0,sizeof(dev_priv->tv_out));
        dev_priv->tv_out.connector = SDVO_OUTPUT_SCART0;
-------------------------------------------------------------------------
You could try modifying the tv out format, the default is 0 atm with a dirty hack to force PAL when it see's a specific clock value  i830_sdvo_mode_fixup (i830_sdvo.c)

	if(mode->Clock==27000)
	    dev_priv->tv_out.format[0]=0x10;
-------------------------------------------------------------------------
You may want to add a few more modelines to the list for SDVO_TV as I only put in the ones I needed (i30_sdvo.c)

#define MODEPREFIX(name) NULL, NULL, name, 0,M_T_DRIVER
#define MODESUFFIX 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,FALSE,FALSE,0,NULL,0,0.0,0.0

/* PAL 576 (50p) 27.0 720 732 795 864  576 581 586 625
 * NTSC 480 (59.94p) 27.0 720 736 800 858 480 484 492 525 */
static DisplayModeRec i830_sdvo_tv_modes[2] = {
    { MODEPREFIX("720x576"),    27000,  720,  732,  795, 864, 0,  576, 581,
      586,  625, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 720x576 at 50Hz */
    { MODEPREFIX("720x480"),    32143,  720,  736,  800, 858, 0,  576, 581,
      586,  625, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX }, /* 720x576 at 60Hz */
/*   { MODEPREFIX("720x480"),    27000,  720,  736,  800, 858, 0,  480, 484,
      492,  525, 0, V_PHSYNC | V_PVSYNC, MODESUFFIX },*/ /* 720x480 at 59.94Hz */
};

static DisplayModePtr
i830_sdvo_get_modes(xf86OutputPtr output)
-------------------------------------------------------------------------
You should probably remove anything to do with overscan from i830_sdvo_mode_fixup (i830_sdvo.c)

I forget exactly what I did to get overscan working but it was a bit of a mess and may well only work with the CH7021A
The overscan is controlled by the following line, I know it causes problems with most modes as the timmings dont divide out correctly and the system won't sync

   nVOverscan=(double)dev_priv->tv_out.height/5000.0*(double)nVTotal;

You'd be better off making the code revert purely to the values recieved from i830_sdvo_create_preferred_input_timing, when I did the basic patch this is what I did and it worked with all the modes I tried without any messing.
-------------------------------------------------------------------------
I'm not sure how generic the SDVO TV spec is, i figured out some of the registers by scanning and setting them, so they could do unexpected things on your HW. You may therefore wish to disable the following in i830_sdvo_mode_set (i830_sdvo.c) just to take them out of the mix.

	i830_sdvo_set_tv_out_filter_flicker(output,
					    dev_priv->tv_out.filter_flicker);
	i830_sdvo_set_tv_out_filter_chroma(output,
					   dev_priv->tv_out.filter_chroma);
	i830_sdvo_set_tv_out_width(output, dev_priv->tv_out.width);

	i830_sdvo_set_tv_out_pos_horiz(output, dev_priv->tv_out.pos_horz);

-------------------------------------------------------------------------
Hope that helps

Will W
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