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fixed dualhead RAM constraints check 

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5915 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen 2004-01-05 18:07:18 +00:00
parent 05ed322913
commit dd0281066d
1 changed files with 38 additions and 6 deletions
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44
src/add-ons/accelerants/nvidia/ProposeDisplayMode.c
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@ -84,7 +84,7 @@ status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, con
{
status_t status = B_OK;
float pix_clock_found;
uint8 m,n,p;
uint8 m,n,p, bpp;
status_t result;
uint32 max_vclk, row_bytes, pointer_reservation;
bool acc_mode;
@ -302,7 +302,8 @@ status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, con
* mode (fixed), and all modes support DPMS (fixed);
* We support scrolling and panning in every mode, so we 'send a signal' to
* BWindowScreen.CanControlFrameBuffer() by setting B_SCROLL. */
//fixme: secondary head does not support DPMS...
/* BTW: B_PARALLEL_ACCESS in combination with a hardcursor enables
* BDirectWindow windowed modes. */
target->flags |= (B_PARALLEL_ACCESS | B_8_BIT_DAC | B_DPMS | B_SCROLL);
/* determine the 'would be' max. pixelclock for the second DAC for the current videomode if dualhead were activated */
@ -310,33 +311,64 @@ status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, con
{
case B_CMAP8:
max_vclk = si->ps.max_dac2_clock_8;
bpp = 1;
break;
case B_RGB15_LITTLE:
case B_RGB16_LITTLE:
max_vclk = si->ps.max_dac2_clock_16;
bpp = 2;
break;
case B_RGB24_LITTLE:
max_vclk = si->ps.max_dac2_clock_24;
bpp = 3;
break;
case B_RGB32_LITTLE:
max_vclk = si->ps.max_dac2_clock_32dh;
bpp = 4;
break;
default:
/* use fail-safe value */
max_vclk = si->ps.max_dac2_clock_32dh;
bpp = 4;
break;
}
/* set DUALHEAD_CAPABLE if suitable */
//fixme: update for independant secondary head use! (reserve fixed memory then)
if (si->ps.secondary_head &&
(((si->ps.memory_size * 1024 * 1024) - pointer_reservation) >=
/* note: extra line for maven vblank included here! */
(row_bytes * (target->virtual_height + 1) * 2)) &&
((target->space == B_RGB16_LITTLE) || (target->space == B_RGB32_LITTLE)) &&
(target->timing.pixel_clock <= (max_vclk * 1000)))
{
target->flags |= DUALHEAD_CAPABLE;
/* extra line for G400 MAVEN vblank design fault workaround needed! */
uint16 vblank_fix = 0;
if (si->ps.card_type == G550) vblank_fix = 1;
switch (target->flags & DUALHEAD_BITS)
{
case DUALHEAD_ON:
case DUALHEAD_SWITCH:
if ((((si->ps.memory_size * 1024 * 1024) - pointer_reservation) >=
(row_bytes * (target->virtual_height + vblank_fix))) &&
((uint16)(row_bytes / bpp) >= (target->timing.h_display * 2)))
{
target->flags |= DUALHEAD_CAPABLE;
}
break;
case DUALHEAD_CLONE:
if (((si->ps.memory_size * 1024 * 1024) - pointer_reservation) >=
(row_bytes * (target->virtual_height + vblank_fix)))
{
target->flags |= DUALHEAD_CAPABLE;
}
break;
case DUALHEAD_OFF:
if (((si->ps.memory_size * 1024 * 1024) - pointer_reservation) >=
(row_bytes * (target->virtual_height + vblank_fix) * 2))
{
target->flags |= DUALHEAD_CAPABLE;
}
break;
}
}
/* set TV_CAPABLE if suitable: pixelclock is not important (defined by TVstandard) */