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card internal bandwidth use reduced by updating CRTC memory granularity settings: this should minimize/remove pixelnoise on older cards.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8025 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen 2004-06-17 12:52:24 +00:00
parent 9eed5c272c
commit 3424f82342
1 changed files with 52 additions and 41 deletions
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93
src/add-ons/accelerants/nvidia/engine/nv_general.c
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@ -80,7 +80,7 @@ status_t nv_general_powerup()
{
status_t status;
LOG(1,("POWERUP: nVidia (open)BeOS Accelerant 0.11 running.\n"));
LOG(1,("POWERUP: nVidia (open)BeOS Accelerant 0.12 running.\n"));
/* preset no laptop */
si->ps.laptop = false;
@ -1061,8 +1061,11 @@ static status_t nv_general_bios_to_powergraphics()
* Double-write action needed on those strange NV11 cards: */
/* RESET: don't doublebuffer CRTC access: set programmed values immediately... */
CRTCW(BUFFER, 0xff);
/* ... and keep fine pitched CRTC granularity on > NV4 cards (b2 = 0) */
CRTCW(BUFFER, 0xfb);
/* ... and don't use fine pitched CRTC granularity on > NV4 cards (b2 = 1) */
/* note:
* the higher-pitched CRTC granularity optimizes use of bandwidth so
* less cards with trouble remain. Confirmed NV15 (GeForce2 Ti500). */
CRTCW(BUFFER, 0xff);
/* select VGA mode (old VGA register) */
CRTCW(MODECTL, 0xc3);
/* select graphics mode (old VGA register) */
@ -1094,8 +1097,11 @@ static status_t nv_general_bios_to_powergraphics()
* Double-write action needed on those strange NV11 cards: */
/* RESET: don't doublebuffer CRTC2 access: set programmed values immediately... */
CRTC2W(BUFFER, 0xff);
/* ... and keep fine pitched CRTC2 granularity (b2 = 0) */
CRTC2W(BUFFER, 0xfb);
/* ... and don't use fine pitched CRTC granularity on > NV4 cards (b2 = 1) */
/* note:
* the higher-pitched CRTC granularity optimizes use of bandwidth so
* less cards with trouble remain. Confirmed NV15 (GeForce2 Ti500). */
CRTC2W(BUFFER, 0xff);
/* select VGA mode (old VGA register) */
CRTC2W(MODECTL, 0xc3);
/* select graphics mode (old VGA register) */
@ -1324,28 +1330,15 @@ status_t nv_general_validate_pic_size (display_mode *target, uint32 *bytes_per_r
/* determine pixel multiple based on CRTC memory pitch constraints:
* -> all NV cards have same granularity constraints on CRTC1 and CRTC2,
* provided that the CRTC1 and CRTC2 BUFFER register b2 = 0;
* -> we use b2 = 1 because this lowers needed bandwidth on the card. This at
* least reduces distortions on cards that have not too much of it.
* (confirmed NV15: GeForce2 Ti500)
*
* (Note: Don't mix this up with CRTC timing contraints! Those are
* multiples of 8 for horizontal, 1 for vertical timing.) */
if (0)
{
/* confirmed for:
* TNT2, TNT2-M64, GeForce2 MX400, GeForce4 MX440, GeForce4 Ti4200,
* GeForceFX 5200: if the CRTC1 (and CRTC2) BUFFER register b2 = 1 */
switch (target->space)
{
case B_CMAP8: crtc_mask = 0x1f; break;
case B_RGB15: crtc_mask = 0x0f; break;
case B_RGB16: crtc_mask = 0x0f; break;
case B_RGB24: crtc_mask = 0x1f; break;
case B_RGB32: crtc_mask = 0x07; break;
default:
LOG(8,("INIT: unknown color space: 0x%08x\n", target->space));
return B_ERROR;
}
}
else
switch (si->ps.card_arch)
{
case NV04A:
/* confirmed for:
* TNT1 always;
* TNT2, TNT2-M64, GeForce2 MX400, GeForce4 MX440, GeForce4 Ti4200,
@ -1368,6 +1361,23 @@ status_t nv_general_validate_pic_size (display_mode *target, uint32 *bytes_per_r
LOG(8,("INIT: unknown color space: 0x%08x\n", target->space));
return B_ERROR;
}
break;
default:
/* confirmed for:
* TNT2, TNT2-M64, GeForce2 MX400, GeForce4 MX440, GeForce4 Ti4200,
* GeForceFX 5200: if the CRTC1 (and CRTC2) BUFFER register b2 = 1 */
switch (target->space)
{
case B_CMAP8: crtc_mask = 0x1f; break;
case B_RGB15: crtc_mask = 0x0f; break;
case B_RGB16: crtc_mask = 0x0f; break;
case B_RGB24: crtc_mask = 0x1f; break;
case B_RGB32: crtc_mask = 0x07; break;
default:
LOG(8,("INIT: unknown color space: 0x%08x\n", target->space));
return B_ERROR;
}
break;
}
/* set virtual_width limit for accelerated modes */
@ -1423,25 +1433,9 @@ status_t nv_general_validate_pic_size (display_mode *target, uint32 *bytes_per_r
}
/* set virtual_width limit for unaccelerated modes */
if (0)
{
/* confirmed for:
* TNT2, TNT2-M64, GeForce2 MX400, GeForce4 MX440, GeForce4 Ti4200,
* GeForceFX 5200: if the CRTC1 (and CRTC2) BUFFER register b2 = 1 */
switch(target->space)
{
case B_CMAP8: max_crtc_width = 16352; break;
case B_RGB15: max_crtc_width = 8176; break;
case B_RGB16: max_crtc_width = 8176; break;
case B_RGB24: max_crtc_width = 5440; break;
case B_RGB32: max_crtc_width = 4088; break;
default:
LOG(8,("INIT: unknown color space: 0x%08x\n", target->space));
return B_ERROR;
}
}
else
switch (si->ps.card_arch)
{
case NV04A:
/* confirmed for:
* TNT1 always;
* TNT2, TNT2-M64, GeForce2 MX400, GeForce4 MX440, GeForce4 Ti4200,
@ -1464,6 +1458,23 @@ status_t nv_general_validate_pic_size (display_mode *target, uint32 *bytes_per_r
LOG(8,("INIT: unknown color space: 0x%08x\n", target->space));
return B_ERROR;
}
break;
default:
/* confirmed for:
* TNT2, TNT2-M64, GeForce2 MX400, GeForce4 MX440, GeForce4 Ti4200,
* GeForceFX 5200: if the CRTC1 (and CRTC2) BUFFER register b2 = 1 */
switch(target->space)
{
case B_CMAP8: max_crtc_width = 16352; break;
case B_RGB15: max_crtc_width = 8176; break;
case B_RGB16: max_crtc_width = 8176; break;
case B_RGB24: max_crtc_width = 5440; break;
case B_RGB32: max_crtc_width = 4088; break;
default:
LOG(8,("INIT: unknown color space: 0x%08x\n", target->space));
return B_ERROR;
}
break;
}
/* check for acc capability, and adjust mode to adhere to hardware constraints */