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fixed memory size check for virtualmodes (take DMA into account)

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11170 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen 2005-01-31 12:36:18 +00:00
parent 9be68599ad
commit 5848a1aedb
1 changed files with 11 additions and 9 deletions
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20
src/add-ons/accelerants/nvidia/ProposeDisplayMode.c
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@ -4,7 +4,7 @@
Other authors for NV driver:
Mark Watson,
Rudolf Cornelissen 9/2002-10/2004
Rudolf Cornelissen 9/2002-1/2005
*/
#define MODULE_BIT 0x00400000
@ -114,7 +114,7 @@ status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, con
float pix_clock_found, target_aspect;
uint8 m,n,p, bpp;
status_t result;
uint32 max_vclk, row_bytes, pointer_reservation;
uint32 max_vclk, row_bytes, mem_reservation;
bool acc_mode;
double target_refresh = ((double)target->timing.pixel_clock * 1000.0) /
(
@ -381,15 +381,17 @@ status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, con
LOG(4, ("PROPOSEMODE: WARNING: pixelclock deviates too much\n"));
}
mem_reservation = 0;
/* checkout space needed for hardcursor (if any) */
pointer_reservation = 0;
if (si->settings.hardcursor) pointer_reservation = 2048;
if (si->settings.hardcursor) mem_reservation = 2048;
/* checkout space needed for DMA (if active) */
if (si->settings.dma_acc) mem_reservation += 65536;
/* memory requirement for frame buffer */
if ((row_bytes * target->virtual_height) >
(si->ps.memory_size - pointer_reservation))
(si->ps.memory_size - mem_reservation))
{
target->virtual_height =
(si->ps.memory_size - pointer_reservation) / row_bytes;
(si->ps.memory_size - mem_reservation) / row_bytes;
}
if (target->virtual_height < target->timing.v_display)
{
@ -456,7 +458,7 @@ status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, con
{
case DUALHEAD_ON:
case DUALHEAD_SWITCH:
if (((si->ps.memory_size - pointer_reservation) >=
if (((si->ps.memory_size - mem_reservation) >=
(row_bytes * target->virtual_height)) &&
((uint16)(row_bytes / bpp) >= (target->timing.h_display * 2)))
{
@ -464,14 +466,14 @@ status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, con
}
break;
case DUALHEAD_CLONE:
if ((si->ps.memory_size - pointer_reservation) >=
if ((si->ps.memory_size - mem_reservation) >=
(row_bytes * target->virtual_height))
{
target->flags |= DUALHEAD_CAPABLE;
}
break;
case DUALHEAD_OFF:
if ((si->ps.memory_size - pointer_reservation) >=
if ((si->ps.memory_size - mem_reservation) >=
(row_bytes * target->virtual_height * 2))
{
target->flags |= DUALHEAD_CAPABLE;