XE_LPD reduces the number of regular watermark latency levels from 8
to 6 on non-dgfx platforms. However the hardware also adds a special
purpose SAGV wateramrk (and an accompanying transition watermark) that
will be used by the hardware in place of the level 0 values during SAGV
transitions.
Bspec: 49325, 49326, 50419
Cc: Matt Atwood <matthew.s.atw...@intel.com>
Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
Signed-off-by: Clinton Taylor <clinton.a.tay...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 32 +++++++++++
drivers/gpu/drm/i915/i915_drv.h | 2 +
drivers/gpu/drm/i915/i915_reg.h | 59 ++++++++++++++------
drivers/gpu/drm/i915/intel_pm.c | 54 ++++++++++++++++--
4 files changed, 126 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index ce44f18340ee..2c2c5676dc30 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -8752,6 +8752,38 @@ static void verify_wm_state(struct intel_crtc *crtc,
hw_wm_level->lines);
}
+ hw_wm_level = &hw->wm.planes[plane->id].sagv.wm0;
+ sw_wm_level = &sw_wm->planes[plane->id].sagv.wm0;
+
+ if (HAS_HW_SAGV_WM(dev_priv) &&
+ !skl_wm_level_equals(hw_wm_level, sw_wm_level)) {
+ drm_err(&dev_priv->drm,
+ "[PLANE:%d:%s] mismatch in SAGV WM (expected
e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+ plane->base.base.id, plane->base.name,
+ sw_wm_level->enable,
+ sw_wm_level->blocks,
+ sw_wm_level->lines,
+ hw_wm_level->enable,
+ hw_wm_level->blocks,
+ hw_wm_level->lines);
+ }
+
+ hw_wm_level = &hw->wm.planes[plane->id].sagv.trans_wm;
+ sw_wm_level = &sw_wm->planes[plane->id].sagv.trans_wm;
+
+ if (HAS_HW_SAGV_WM(dev_priv) &&
+ !skl_wm_level_equals(hw_wm_level, sw_wm_level)) {
+ drm_err(&dev_priv->drm,
+ "[PLANE:%d:%s] mismatch in SAGV trans WM
(expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+ plane->base.base.id, plane->base.name,
+ sw_wm_level->enable,
+ sw_wm_level->blocks,
+ sw_wm_level->lines,
+ hw_wm_level->enable,
+ hw_wm_level->blocks,
+ hw_wm_level->lines);
+ }
+
/* DDB */
hw_ddb_entry = &hw->ddb_y[plane->id];
sw_ddb_entry = &new_crtc_state->wm.skl.plane_ddb_y[plane->id];
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 6eb6c6acd81e..d7583a01e135 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -590,6 +590,8 @@ i915_fence_timeout(const struct drm_i915_private *i915)
/* Amount of SAGV/QGV points, BSpec precisely defines this */
#define I915_NUM_QGV_POINTS 8
+#define HAS_HW_SAGV_WM(i915) (DISPLAY_VER(i915) >= 13 && !IS_DGFX(i915))
+
struct ddi_vbt_port_info {
/* Non-NULL if port present. */
struct intel_bios_encoder_data *devdata;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index dbb75cd087d3..ab6ffe036841 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6435,16 +6435,28 @@ enum {
/* Watermark register definitions for SKL */
#define _CUR_WM_A_0 0x70140
#define _CUR_WM_B_0 0x71140
+#define _CUR_WM_SAGV_A 0x70158
+#define _CUR_WM_SAGV_B 0x71158
+#define _CUR_WM_SAGV_TRANS_A 0x7015C
+#define _CUR_WM_SAGV_TRANS_B 0x7115C
+#define _CUR_WM_TRANS_A 0x70168
+#define _CUR_WM_TRANS_B 0x71168
#define _PLANE_WM_1_A_0 0x70240
#define _PLANE_WM_1_B_0 0x71240
#define _PLANE_WM_2_A_0 0x70340
#define _PLANE_WM_2_B_0 0x71340
-#define _PLANE_WM_TRANS_1_A_0 0x70268
-#define _PLANE_WM_TRANS_1_B_0 0x71268
-#define _PLANE_WM_TRANS_2_A_0 0x70368
-#define _PLANE_WM_TRANS_2_B_0 0x71368
-#define _CUR_WM_TRANS_A_0 0x70168
-#define _CUR_WM_TRANS_B_0 0x71168
+#define _PLANE_WM_SAGV_1_A 0x70258
+#define _PLANE_WM_SAGV_1_B 0x71258
+#define _PLANE_WM_SAGV_2_A 0x70358
+#define _PLANE_WM_SAGV_2_B 0x71358
+#define _PLANE_WM_SAGV_TRANS_1_A 0x7025C
+#define _PLANE_WM_SAGV_TRANS_1_B 0x7125C
+#define _PLANE_WM_SAGV_TRANS_2_A 0x7035C
+#define _PLANE_WM_SAGV_TRANS_2_B 0x7135C
+#define _PLANE_WM_TRANS_1_A 0x70268
+#define _PLANE_WM_TRANS_1_B 0x71268
+#define _PLANE_WM_TRANS_2_A 0x70368
+#define _PLANE_WM_TRANS_2_B 0x71368
#define PLANE_WM_EN (1 << 31)
#define PLANE_WM_IGNORE_LINES (1 << 30)
#define PLANE_WM_LINES_MASK REG_GENMASK(26, 14)
@@ -6452,19 +6464,32 @@ enum {
#define _CUR_WM_0(pipe) _PIPE(pipe, _CUR_WM_A_0, _CUR_WM_B_0)
#define CUR_WM(pipe, level) _MMIO(_CUR_WM_0(pipe) + ((4) * (level)))
-#define CUR_WM_TRANS(pipe) _MMIO_PIPE(pipe, _CUR_WM_TRANS_A_0,
_CUR_WM_TRANS_B_0)
-
+#define CUR_WM_SAGV(pipe) _MMIO_PIPE(pipe, _CUR_WM_SAGV_A, _CUR_WM_SAGV_B)
+#define CUR_WM_SAGV_TRANS(pipe) _MMIO_PIPE(pipe, _CUR_WM_SAGV_TRANS_A,
_CUR_WM_SAGV_TRANS_B)
+#define CUR_WM_TRANS(pipe) _MMIO_PIPE(pipe, _CUR_WM_TRANS_A, _CUR_WM_TRANS_B)
#define _PLANE_WM_1(pipe) _PIPE(pipe, _PLANE_WM_1_A_0, _PLANE_WM_1_B_0)
#define _PLANE_WM_2(pipe) _PIPE(pipe, _PLANE_WM_2_A_0, _PLANE_WM_2_B_0)
-#define _PLANE_WM_BASE(pipe, plane) \
- _PLANE(plane, _PLANE_WM_1(pipe), _PLANE_WM_2(pipe))
-#define PLANE_WM(pipe, plane, level) \
- _MMIO(_PLANE_WM_BASE(pipe, plane) + ((4) * (level)))
-#define _PLANE_WM_TRANS_1(pipe) \
- _PIPE(pipe, _PLANE_WM_TRANS_1_A_0,
_PLANE_WM_TRANS_1_B_0)
-#define _PLANE_WM_TRANS_2(pipe) \
- _PIPE(pipe, _PLANE_WM_TRANS_2_A_0,
_PLANE_WM_TRANS_2_B_0)
-#define PLANE_WM_TRANS(pipe, plane) \
+#define _PLANE_WM_BASE(pipe, plane) \
+ _PLANE(plane, _PLANE_WM_1(pipe), _PLANE_WM_2(pipe))
+#define PLANE_WM(pipe, plane, level) \
+ _MMIO(_PLANE_WM_BASE(pipe, plane) + ((4) * (level)))
+#define _PLANE_WM_SAGV_1(pipe) \
+ _PIPE(pipe, _PLANE_WM_SAGV_1_A, _PLANE_WM_SAGV_1_B)
+#define _PLANE_WM_SAGV_2(pipe) \
+ _PIPE(pipe, _PLANE_WM_SAGV_2_A, _PLANE_WM_SAGV_2_B)
+#define PLANE_WM_SAGV(pipe, plane) \
+ _MMIO(_PLANE(plane, _PLANE_WM_SAGV_1(pipe), _PLANE_WM_SAGV_2(pipe)))
+#define _PLANE_WM_SAGV_TRANS_1(pipe) \
+ _PIPE(pipe, _PLANE_WM_SAGV_TRANS_1_A, _PLANE_WM_SAGV_TRANS_1_B)
+#define _PLANE_WM_SAGV_TRANS_2(pipe) \
+ _PIPE(pipe, _PLANE_WM_SAGV_TRANS_2_A, _PLANE_WM_SAGV_TRANS_2_B)
+#define PLANE_WM_SAGV_TRANS(pipe, plane) \
+ _MMIO(_PLANE(plane, _PLANE_WM_SAGV_TRANS_1(pipe),
_PLANE_WM_SAGV_TRANS_2(pipe)))
+#define _PLANE_WM_TRANS_1(pipe) \
+ _PIPE(pipe, _PLANE_WM_TRANS_1_A, _PLANE_WM_TRANS_1_B)
+#define _PLANE_WM_TRANS_2(pipe) \
+ _PIPE(pipe, _PLANE_WM_TRANS_2_A, _PLANE_WM_TRANS_2_B)
+#define PLANE_WM_TRANS(pipe, plane) \
_MMIO(_PLANE(plane, _PLANE_WM_TRANS_1(pipe), _PLANE_WM_TRANS_2(pipe)))
/* define the Watermark register on Ironlake */
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 15d9a64e7b4c..95fda20d5547 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2983,7 +2983,9 @@ static void intel_fixup_cur_wm_latency(struct
drm_i915_private *dev_priv,
int ilk_wm_max_level(const struct drm_i915_private *dev_priv)
{
/* how many WM levels are we expecting */
- if (DISPLAY_VER(dev_priv) >= 9)
+ if (HAS_HW_SAGV_WM(dev_priv))
+ return 5;
+ else if (DISPLAY_VER(dev_priv) >= 9)
return 7;
else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
return 4;
@@ -4011,8 +4013,9 @@ static int intel_compute_sagv_mask(struct
intel_atomic_state *state)
* latter from the plane commit hooks (especially in the legacy
* cursor case)
*/
- pipe_wm->use_sagv_wm = DISPLAY_VER(dev_priv) >= 12 &&
- intel_can_enable_sagv(dev_priv,
new_bw_state);
+ pipe_wm->use_sagv_wm = !HAS_HW_SAGV_WM(dev_priv) &&
+ DISPLAY_VER(dev_priv) >= 12 &&
+ intel_can_enable_sagv(dev_priv, new_bw_state);
}
if (intel_can_enable_sagv(dev_priv, new_bw_state) !=
@@ -5619,6 +5622,13 @@ void skl_write_plane_wm(struct intel_plane *plane,
skl_write_wm_level(dev_priv, PLANE_WM_TRANS(pipe, plane_id),
skl_plane_trans_wm(pipe_wm, plane_id));
+ if (HAS_HW_SAGV_WM(dev_priv)) {
+ skl_write_wm_level(dev_priv, PLANE_WM_SAGV(pipe, plane_id),
+ &wm->sagv.wm0);
+ skl_write_wm_level(dev_priv, PLANE_WM_SAGV_TRANS(pipe,
plane_id),
+ &wm->sagv.trans_wm);
+ }
+
if (DISPLAY_VER(dev_priv) >= 11) {
skl_ddb_entry_write(dev_priv,
PLANE_BUF_CFG(pipe, plane_id), ddb_y);
@@ -5652,6 +5662,15 @@ void skl_write_cursor_wm(struct intel_plane *plane,
skl_write_wm_level(dev_priv, CUR_WM_TRANS(pipe),
skl_plane_trans_wm(pipe_wm, plane_id));
+ if (HAS_HW_SAGV_WM(dev_priv)) {
+ const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
+
+ skl_write_wm_level(dev_priv, CUR_WM_SAGV(pipe),
+ &wm->sagv.wm0);
+ skl_write_wm_level(dev_priv, CUR_WM_SAGV_TRANS(pipe),
+ &wm->sagv.trans_wm);
+ }
+
skl_ddb_entry_write(dev_priv, CUR_BUF_CFG(pipe), ddb);
}
@@ -6016,6 +6035,15 @@ static bool skl_plane_selected_wm_equals(struct
intel_plane *plane,
return false;
}
+ if (HAS_HW_SAGV_WM(i915)) {
+ const struct skl_plane_wm *old_wm =
&old_pipe_wm->planes[plane->id];
+ const struct skl_plane_wm *new_wm =
&new_pipe_wm->planes[plane->id];
+
+ if (!skl_wm_level_equals(&old_wm->sagv.wm0, &new_wm->sagv.wm0)
||
+ !skl_wm_level_equals(&old_wm->sagv.trans_wm,
&new_wm->sagv.trans_wm))
+ return false;
+ }
+
return skl_wm_level_equals(skl_plane_trans_wm(old_pipe_wm, plane->id),
skl_plane_trans_wm(new_pipe_wm, plane->id));
}
@@ -6234,7 +6262,25 @@ void skl_pipe_wm_get_hw_state(struct intel_crtc *crtc,
skl_wm_level_from_reg_val(val, &wm->trans_wm);
- if (DISPLAY_VER(dev_priv) >= 12) {
+ if (HAS_HW_SAGV_WM(dev_priv)) {
+ if (plane_id != PLANE_CURSOR)
+ val = intel_uncore_read(&dev_priv->uncore,
+ PLANE_WM_SAGV(pipe,
plane_id));
+ else
+ val = intel_uncore_read(&dev_priv->uncore,
+ CUR_WM_SAGV(pipe));
+
+ skl_wm_level_from_reg_val(val, &wm->sagv.wm0);
+
+ if (plane_id != PLANE_CURSOR)
+ val = intel_uncore_read(&dev_priv->uncore,
+
PLANE_WM_SAGV_TRANS(pipe, plane_id));
+ else
+ val = intel_uncore_read(&dev_priv->uncore,
+
CUR_WM_SAGV_TRANS(pipe));
+
+ skl_wm_level_from_reg_val(val, &wm->sagv.trans_wm);
+ } else if (DISPLAY_VER(dev_priv) >= 12) {
wm->sagv.wm0 = wm->wm[0];
wm->sagv.trans_wm = wm->trans_wm;
}
--
2.25.4
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