RKL uses the same BW_BUDDY programming table as TGL, but programs the
values into a single set BUDDY0 set of registers rather than the
BUDDY1/BUDDY2 sets used by TGL.
Bspec: 49218
Cc: Aditya Swarup <aditya.swarup@xxxxxxxxx>
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
.../drm/i915/display/intel_display_power.c | 44 +++++++++++--------
drivers/gpu/drm/i915/i915_reg.h | 14 ++++--
2 files changed, 35 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 71691919d101..a83e1bc0e3a7 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -5249,7 +5249,7 @@ static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv)
enum intel_dram_type type = dev_priv->dram_info.type;
u8 num_channels = dev_priv->dram_info.num_channels;
const struct buddy_page_mask *table;
- int i;
+ int config, min_buddy, max_buddy, i;
if (IS_TGL_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_B0))
/* Wa_1409767108: tgl */
@@ -5257,29 +5257,35 @@ static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv)
else
table = tgl_buddy_page_masks;
- for (i = 0; table[i].page_mask != 0; i++)
- if (table[i].num_channels == num_channels &&
- table[i].type == type)
+ if (IS_ROCKETLAKE(dev_priv)) {
+ min_buddy = max_buddy = 0;
+ } else {
+ min_buddy = 1;
+ max_buddy = 2;
+ }
+
+ for (config = 0; table[config].page_mask != 0; config++)
+ if (table[config].num_channels == num_channels &&
+ table[config].type == type)
break;
- if (table[i].page_mask == 0) {
+ if (table[config].page_mask == 0) {
drm_dbg(&dev_priv->drm,
"Unknown memory configuration; disabling address buddy logic.\n");
- intel_de_write(dev_priv, BW_BUDDY1_CTL, BW_BUDDY_DISABLE);
- intel_de_write(dev_priv, BW_BUDDY2_CTL, BW_BUDDY_DISABLE);
+ for (i = min_buddy; i <= max_buddy; i++)
+ intel_de_write(dev_priv, BW_BUDDY_CTL(i),
+ BW_BUDDY_DISABLE);
} else {
- intel_de_write(dev_priv, BW_BUDDY1_PAGE_MASK,
- table[i].page_mask);
- intel_de_write(dev_priv, BW_BUDDY2_PAGE_MASK,
- table[i].page_mask);
-
- /* Wa_22010178259:tgl */
- intel_de_rmw(dev_priv, BW_BUDDY1_CTL,
- BW_BUDDY_TLB_REQ_TIMER_MASK,
- REG_FIELD_PREP(BW_BUDDY_TLB_REQ_TIMER_MASK, 0x8));
- intel_de_rmw(dev_priv, BW_BUDDY2_CTL,
- BW_BUDDY_TLB_REQ_TIMER_MASK,
- REG_FIELD_PREP(BW_BUDDY_TLB_REQ_TIMER_MASK, 0x8));
+ for (i = min_buddy; i <= max_buddy; i++) {
+ intel_de_write(dev_priv, BW_BUDDY_PAGE_MASK(i),
+ table[config].page_mask);
+
+ /* Wa_22010178259:tgl,rkl */
+ intel_de_rmw(dev_priv, BW_BUDDY_CTL(i),
+ BW_BUDDY_TLB_REQ_TIMER_MASK,
+ REG_FIELD_PREP(BW_BUDDY_TLB_REQ_TIMER_MASK,
+ 0x8));
+ }
}
}
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 59c1d527cf13..2266f9fc2d79 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7832,13 +7832,19 @@ enum {
#define WAIT_FOR_PCH_RESET_ACK (1 << 1)
#define WAIT_FOR_PCH_FLR_ACK (1 << 0)
-#define BW_BUDDY1_CTL _MMIO(0x45140)
-#define BW_BUDDY2_CTL _MMIO(0x45150)
+#define _BW_BUDDY0_CTL 0x45130
+#define _BW_BUDDY1_CTL 0x45140
+#define BW_BUDDY_CTL(x) _MMIO(_PICK_EVEN(x, \
+ _BW_BUDDY0_CTL, \
+ _BW_BUDDY1_CTL))
#define BW_BUDDY_DISABLE REG_BIT(31)
#define BW_BUDDY_TLB_REQ_TIMER_MASK REG_GENMASK(21, 16)
-#define BW_BUDDY1_PAGE_MASK _MMIO(0x45144)
-#define BW_BUDDY2_PAGE_MASK _MMIO(0x45154)
+#define _BW_BUDDY0_PAGE_MASK 0x45134
+#define _BW_BUDDY1_PAGE_MASK 0x45144
+#define BW_BUDDY_PAGE_MASK(x) _MMIO(_PICK_EVEN(x, \
+ _BW_BUDDY0_PAGE_MASK, \
+ _BW_BUDDY1_PAGE_MASK))
#define HSW_NDE_RSTWRN_OPT _MMIO(0x46408)
#define RESET_PCH_HANDSHAKE_ENABLE (1 << 4)
--
2.24.1
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