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drm/nouveau: Add module parameter to override the default AGP rate.

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Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-09-08 02:28:23 +02:00 committed by Ben Skeggs
parent 71d0618661
commit de5899bdac
3 changed files with 15 additions and 5 deletions
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6
drivers/gpu/drm/nouveau/nouveau_drv.c
View File

@ -35,9 +35,9 @@
#include "drm_pciids.h"
MODULE_PARM_DESC(noagp, "Disable AGP");
int nouveau_noagp;
module_param_named(noagp, nouveau_noagp, int, 0400);
MODULE_PARM_DESC(agpmode, "AGP mode (0 to disable AGP)");
int nouveau_agpmode = -1;
module_param_named(agpmode, nouveau_agpmode, int, 0400);
MODULE_PARM_DESC(modeset, "Enable kernel modesetting");
static int nouveau_modeset = -1; /* kms */

2
drivers/gpu/drm/nouveau/nouveau_drv.h
View File

@ -659,7 +659,7 @@ nouveau_bo_ref(struct nouveau_bo *ref, struct nouveau_bo **pnvbo)
} while (0)
/* nouveau_drv.c */
extern int nouveau_noagp;
extern int nouveau_agpmode;
extern int nouveau_duallink;
extern int nouveau_uscript_lvds;
extern int nouveau_uscript_tmds;

12
drivers/gpu/drm/nouveau/nouveau_mem.c
View File

@ -430,6 +430,16 @@ get_agp_mode(struct drm_device *dev, unsigned long mode)
if (dev_priv->chipset == 0x18)
mode &= ~PCI_AGP_COMMAND_FW;
/*
* AGP mode set in the command line.
*/
if (nouveau_agpmode > 0) {
bool agpv3 = mode & 0x8;
int rate = agpv3 ? nouveau_agpmode / 4 : nouveau_agpmode;
mode = (mode & ~0x7) | (rate & 0x7);
}
return mode;
}
#endif
@ -613,7 +623,7 @@ nouveau_mem_gart_init(struct drm_device *dev)
dev_priv->gart_info.type = NOUVEAU_GART_NONE;
#if !defined(__powerpc__) && !defined(__ia64__)
if (drm_device_is_agp(dev) && dev->agp && !nouveau_noagp) {
if (drm_device_is_agp(dev) && dev->agp && nouveau_agpmode) {
ret = nouveau_mem_init_agp(dev);
if (ret)
NV_ERROR(dev, "Error initialising AGP: %d\n", ret);