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);
diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index 5084595..cf238bf 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -270,6 +270,10 @@
#define PCIE_PORT_INDEX 0x0038
#define PCIE_PORT_DATA 0x003C
+#define CHMAP 0x2004
+#define NOOFCHAN_SHIFT 12
+#define NOOFCHAN_MASK 0x00003000
+
#define RAMCFG 0x2408
#define NOOFBANK_SHIFT 0
#define NOOFBANK_MASK 0x00000001
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 595ac63..4055391 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -774,14 +774,36 @@
{
fixed20_12 a;
u32 tmp;
+ int chansize, numchan;
int r;
/* Get VRAM informations */
- /* FIXME: Don't know how to determine vram width, need to check
- * vram_width usage
- */
- rdev->mc.vram_width = 128;
rdev->mc.vram_is_ddr = true;
+ tmp = RREG32(MC_ARB_RAMCFG);
+ if (tmp & CHANSIZE_OVERRIDE) {
+ chansize = 16;
+ } else if (tmp & CHANSIZE_MASK) {
+ chansize = 64;
+ } else {
+ chansize = 32;
+ }
+ tmp = RREG32(MC_SHARED_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);
diff --git a/drivers/gpu/drm/radeon/rv770d.h b/drivers/gpu/drm/radeon/rv770d.h
index 4b9c3d6..a1367ab 100644
--- a/drivers/gpu/drm/radeon/rv770d.h
+++ b/drivers/gpu/drm/radeon/rv770d.h
@@ -129,6 +129,10 @@
#define HDP_REG_COHERENCY_FLUSH_CNTL 0x54A0
#define HDP_TILING_CONFIG 0x2F3C
+#define MC_SHARED_CHMAP 0x2004
+#define NOOFCHAN_SHIFT 12
+#define NOOFCHAN_MASK 0x00003000
+
#define MC_ARB_RAMCFG 0x2760
#define NOOFBANK_SHIFT 0
#define NOOFBANK_MASK 0x00000003
@@ -142,6 +146,7 @@
#define CHANSIZE_MASK 0x00000100
#define BURSTLENGTH_SHIFT 9
#define BURSTLENGTH_MASK 0x00000200
+#define CHANSIZE_OVERRIDE (1 << 11)
#define MC_VM_AGP_TOP 0x2028
#define MC_VM_AGP_BOT 0x202C
#define MC_VM_AGP_BASE 0x2030