drm/radeon/kms: fix vram_width calculation on r6xx/r7xx
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 1b5aa1f..e87475c 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -339,11 +339,10 @@
{
fixed20_12 a;
u32 tmp;
- int chansize;
+ int chansize, numchan;
int r;
/* Get VRAM informations */
- rdev->mc.vram_width = 128;
rdev->mc.vram_is_ddr = true;
tmp = RREG32(RAMCFG);
if (tmp & CHANSIZE_OVERRIDE) {
@@ -353,17 +352,23 @@
} else {
chansize = 32;
}
- if (rdev->family == CHIP_R600) {
- rdev->mc.vram_width = 8 * chansize;
- } else if (rdev->family == CHIP_RV670) {
- rdev->mc.vram_width = 4 * chansize;
- } else if ((rdev->family == CHIP_RV610) ||
- (rdev->family == CHIP_RV620)) {
- rdev->mc.vram_width = chansize;
- } else if ((rdev->family == CHIP_RV630) ||
- (rdev->family == CHIP_RV635)) {
- rdev->mc.vram_width = 2 * chansize;
+ tmp = RREG32(CHMAP);
+ switch ((tmp & NOOFCHAN_MASK) >> NOOFCHAN_SHIFT) {
+ case 0:
+ default:
+ numchan = 1;
+ break;
+ case 1:
+ numchan = 2;
+ break;
+ case 2:
+ numchan = 4;
+ break;
+ case 3:
+ numchan = 8;
+ break;
}
+ rdev->mc.vram_width = numchan * chansize;
/* Could aper size report 0 ? */
rdev->mc.aper_base = drm_get_resource_start(rdev->ddev, 0);
rdev->mc.aper_size = drm_get_resource_len(rdev->ddev, 0);