Determine whether we need to apply this workaround at atomic check time
and just set a flag that will be used by the main watermark update
routine.
Moving this workaround into the atomic framework reduces
ilk_update_sprite_wm() to just a standard watermark update, so drop it
completely and just ensure that ilk_update_wm() is called whenever a
sprite plane is updated in a way that would affect watermarks.
Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
---
drivers/gpu/drm/i915/intel_atomic.c | 1 +
drivers/gpu/drm/i915/intel_display.c | 39 +++++++++++++++++++++++++++++-------
drivers/gpu/drm/i915/intel_drv.h | 3 +++
drivers/gpu/drm/i915/intel_pm.c | 35 +++++++++++---------------------
4 files changed, 48 insertions(+), 30 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_atomic.c
b/drivers/gpu/drm/i915/intel_atomic.c
index f1975f2..05b1203 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -94,6 +94,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
crtc_state->update_pipe = false;
+ crtc_state->disable_lp_wm = false;
return &crtc_state->base;
}
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 017641a..daa0ede 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11514,18 +11514,32 @@ retry:
static bool intel_wm_need_update(struct drm_plane *plane,
struct drm_plane_state *state)
{
- /* Update watermarks on tiling changes. */
+ struct intel_plane_state *new = to_intel_plane_state(state);
+ struct intel_plane_state *cur = to_intel_plane_state(plane->state);
+
+ /* Update watermarks on tiling or size changes. */
if (!plane->state->fb || !state->fb ||
plane->state->fb->modifier[0] != state->fb->modifier[0] ||
- plane->state->rotation != state->rotation)
- return true;
-
- if (plane->state->crtc_w != state->crtc_w)
+ plane->state->rotation != state->rotation ||
+ drm_rect_width(&new->src) != drm_rect_width(&cur->src) ||
+ drm_rect_height(&new->src) != drm_rect_height(&cur->src) ||
+ drm_rect_width(&new->dst) != drm_rect_width(&cur->dst) ||
+ drm_rect_height(&new->dst) != drm_rect_height(&cur->dst))
return true;
return false;
}
+static bool needs_scaling(struct intel_plane_state *state)
+{
+ int src_w = drm_rect_width(&state->src) >> 16;
+ int src_h = drm_rect_height(&state->src) >> 16;
+ int dst_w = drm_rect_width(&state->dst);
+ int dst_h = drm_rect_height(&state->dst);
+
+ return (src_w != dst_w || src_h != dst_h);
+}
+
int intel_plane_atomic_calc_changes(struct drm_crtc_state *crtc_state,
struct drm_plane_state *plane_state)
{
@@ -11541,7 +11555,6 @@ int intel_plane_atomic_calc_changes(struct
drm_crtc_state *crtc_state,
bool mode_changed = needs_modeset(crtc_state);
bool was_crtc_enabled = crtc->state->active;
bool is_crtc_enabled = crtc_state->active;
-
bool turn_off, turn_on, visible, was_visible;
struct drm_framebuffer *fb = plane_state->fb;
@@ -11659,11 +11672,23 @@ int intel_plane_atomic_calc_changes(struct
drm_crtc_state *crtc_state,
case DRM_PLANE_TYPE_CURSOR:
break;
case DRM_PLANE_TYPE_OVERLAY:
- if (turn_off && !mode_changed) {
+ /*
+ * WaCxSRDisabledForSpriteScaling:ivb
+ *
+ * cstate->update_wm was already set above, so this flag will
+ * take effect when we commit and program watermarks.
+ */
+ if (IS_IVYBRIDGE(dev) &&
+ needs_scaling(to_intel_plane_state(plane_state)) &&
+ !needs_scaling(old_plane_state)) {
+ to_intel_crtc_state(crtc_state)->disable_lp_wm = true;
+ } else if (turn_off && !mode_changed) {
intel_crtc->atomic.wait_vblank = true;
intel_crtc->atomic.update_sprite_watermarks |=
1 << i;
}
+
+ break;
}
return 0;
}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 02a755a..3fa2e66 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -458,6 +458,9 @@ struct intel_crtc_state {
/* w/a for waiting 2 vblanks during crtc enable */
enum pipe hsw_workaround_pipe;
+
+ /* IVB sprite scaling w/a (WaCxSRDisabledForSpriteScaling:ivb) */
+ bool disable_lp_wm;
};
struct vlv_wm_state {
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 51dbda7..d601630 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3728,6 +3728,18 @@ static void ilk_update_wm(struct drm_crtc *crtc)
WARN_ON(cstate->base.active != intel_crtc->active);
+ /*
+ * IVB workaround: must disable low power watermarks for at least
+ * one frame before enabling scaling. LP watermarks can be re-enabled
+ * when scaling is disabled.
+ *
+ * WaCxSRDisabledForSpriteScaling:ivb
+ */
+ if (cstate->disable_lp_wm) {
+ ilk_disable_lp_wm(dev);
+ intel_wait_for_vblank(dev, intel_crtc->pipe);
+ }
+
intel_compute_pipe_wm(cstate, &pipe_wm);
if (!memcmp(&intel_crtc->wm.active, &pipe_wm, sizeof(pipe_wm)))
@@ -3759,28 +3771,6 @@ static void ilk_update_wm(struct drm_crtc *crtc)
ilk_write_wm_values(dev_priv, &results);
}
-static void
-ilk_update_sprite_wm(struct drm_plane *plane,
- struct drm_crtc *crtc,
- uint32_t sprite_width, uint32_t sprite_height,
- int pixel_size, bool enabled, bool scaled)
-{
- struct drm_device *dev = plane->dev;
- struct intel_plane *intel_plane = to_intel_plane(plane);
-
- /*
- * IVB workaround: must disable low power watermarks for at least
- * one frame before enabling scaling. LP watermarks can be re-enabled
- * when scaling is disabled.
- *
- * WaCxSRDisabledForSpriteScaling:ivb
- */
- if (IS_IVYBRIDGE(dev) && scaled && ilk_disable_lp_wm(dev))
- intel_wait_for_vblank(dev, intel_plane->pipe);
-
- ilk_update_wm(crtc);
-}
-
static void skl_pipe_wm_active_state(uint32_t val,
struct skl_pipe_wm *active,
bool is_transwm,
@@ -7091,7 +7081,6 @@ void intel_init_pm(struct drm_device *dev)
(!IS_GEN5(dev) && dev_priv->wm.pri_latency[0] &&
dev_priv->wm.spr_latency[0] &&
dev_priv->wm.cur_latency[0])) {
dev_priv->display.update_wm = ilk_update_wm;
- dev_priv->display.update_sprite_wm =
ilk_update_sprite_wm;
} else {
DRM_DEBUG_KMS("Failed to read display plane latency. "
"Disable CxSR\n");
--
2.1.4
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