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drm/radeon/kms: vram sizing on certain r100 chips needs workaround.

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If an rn50/r100/m6/m7 GPU has < 64MB RAM, i.e. 8/16/32, the
aperture used to calculate the MC_FB_LOCATION needs to be worked
out from the CONFIG_APER_SIZE register, and not the actual vram size.

TTM VRAM size was also being initialised wrong, use actual vram size
to initialise it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2009-07-21 20:39:30 +10:00
parent 664f865902
commit 7a50f01a4a
12 changed files with 56 additions and 42 deletions
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34
drivers/gpu/drm/radeon/r100.c
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@ -173,8 +173,12 @@ void r100_mc_setup(struct radeon_device *rdev)
DRM_ERROR("Failed to register debugfs file for R100 MC !\n");
}
/* Write VRAM size in case we are limiting it */
WREG32(RADEON_CONFIG_MEMSIZE, rdev->mc.vram_size);
tmp = rdev->mc.vram_location + rdev->mc.vram_size - 1;
WREG32(RADEON_CONFIG_MEMSIZE, rdev->mc.real_vram_size);
/* Novell bug 204882 for RN50/M6/M7 with 8/16/32MB VRAM,
* if the aperture is 64MB but we have 32MB VRAM
* we report only 32MB VRAM but we have to set MC_FB_LOCATION
* to 64MB, otherwise the gpu accidentially dies */
tmp = rdev->mc.vram_location + rdev->mc.mc_vram_size - 1;
tmp = REG_SET(RADEON_MC_FB_TOP, tmp >> 16);
tmp |= REG_SET(RADEON_MC_FB_START, rdev->mc.vram_location >> 16);
WREG32(RADEON_MC_FB_LOCATION, tmp);
@ -1447,25 +1451,28 @@ void r100_vram_init_sizes(struct radeon_device *rdev)
uint32_t tom;
/* read NB_TOM to get the amount of ram stolen for the GPU */
tom = RREG32(RADEON_NB_TOM);
rdev->mc.vram_size = (((tom >> 16) - (tom & 0xffff) + 1) << 16);
rdev->mc.real_vram_size = (((tom >> 16) - (tom & 0xffff) + 1) << 16);
/* for IGPs we need to keep VRAM where it was put by the BIOS */
rdev->mc.vram_location = (tom & 0xffff) << 16;
WREG32(RADEON_CONFIG_MEMSIZE, rdev->mc.vram_size);
WREG32(RADEON_CONFIG_MEMSIZE, rdev->mc.real_vram_size);
rdev->mc.mc_vram_size = rdev->mc.real_vram_size;
} else {
rdev->mc.vram_size = RREG32(RADEON_CONFIG_MEMSIZE);
rdev->mc.real_vram_size = RREG32(RADEON_CONFIG_MEMSIZE);
/* Some production boards of m6 will report 0
* if it's 8 MB
*/
if (rdev->mc.vram_size == 0) {
rdev->mc.vram_size = 8192 * 1024;
WREG32(RADEON_CONFIG_MEMSIZE, rdev->mc.vram_size);
if (rdev->mc.real_vram_size == 0) {
rdev->mc.real_vram_size = 8192 * 1024;
WREG32(RADEON_CONFIG_MEMSIZE, rdev->mc.real_vram_size);
}
/* let driver place VRAM */
rdev->mc.vram_location = 0xFFFFFFFFUL;
/* Fix for RN50, M6, M7 with 8/16/32(??) MBs of VRAM -
* Novell bug 204882 + along with lots of ubuntu ones */
if (config_aper_size > rdev->mc.vram_size)
rdev->mc.vram_size = config_aper_size;
if (config_aper_size > rdev->mc.real_vram_size)
rdev->mc.mc_vram_size = config_aper_size;
else
rdev->mc.mc_vram_size = rdev->mc.real_vram_size;
}
/* work out accessible VRAM */
@ -1477,8 +1484,11 @@ void r100_vram_init_sizes(struct radeon_device *rdev)
if (accessible > rdev->mc.aper_size)
accessible = rdev->mc.aper_size;
if (rdev->mc.vram_size > rdev->mc.aper_size)
rdev->mc.vram_size = rdev->mc.aper_size;
if (rdev->mc.mc_vram_size > rdev->mc.aper_size)
rdev->mc.mc_vram_size = rdev->mc.aper_size;
if (rdev->mc.real_vram_size > rdev->mc.aper_size)
rdev->mc.real_vram_size = rdev->mc.aper_size;
}
void r100_vram_info(struct radeon_device *rdev)