Addressing one of the comments, recommending to extract platform
specific code from intel_can_enable_sagv as a preparation, before
we are going to add support for tgl+.
Current code in intel_can_enable_sagv is valid only for skl,
so this patch adds also proper support for icl, subsequent
patches will add support for tgl+, combined with other required
changes.
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 89 ++++++++++++++++++++++-----------
1 file changed, 61 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index f8d62d1977ac..64193b098175 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3757,41 +3757,24 @@ intel_disable_sagv(struct drm_i915_private *dev_priv)
return 0;
}
-bool intel_can_enable_sagv(struct intel_atomic_state *state)
+static bool icl_can_enable_sagv_on_pipe(struct intel_crtc_state *crtc_state)
{
- struct drm_device *dev = state->base.dev;
+ struct drm_device *dev = crtc_state->uapi.crtc->dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_crtc *crtc;
struct intel_plane *plane;
- struct intel_crtc_state *crtc_state;
- enum pipe pipe;
+ struct intel_plane_state *plane_state;
int level, latency;
- if (!intel_has_sagv(dev_priv))
- return false;
+ crtc = to_intel_crtc(crtc_state->uapi.crtc);
- /*
- * If there are no active CRTCs, no additional checks need be performed
- */
- if (hweight8(state->active_pipes) == 0)
- return true;
-
- /*
- * SKL+ workaround: bspec recommends we disable SAGV when we have
- * more then one pipe enabled
- */
- if (hweight8(state->active_pipes) > 1)
- return false;
-
- /* Since we're now guaranteed to only have one active CRTC... */
- pipe = ffs(state->active_pipes) - 1;
- crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
- crtc_state = to_intel_crtc_state(crtc->base.state);
-
- if (crtc_state->hw.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
+ if (crtc_state->hw.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) {
+ DRM_DEBUG_KMS("No SAGV for interlaced mode on pipe %c\n",
+ pipe_name(crtc->pipe));
return false;
+ }
- for_each_intel_plane_on_crtc(dev, crtc, plane) {
+ intel_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) {
struct skl_plane_wm *wm =
&crtc_state->wm.skl.optimal.planes[plane->id];
@@ -3807,7 +3790,7 @@ bool intel_can_enable_sagv(struct intel_atomic_state *state)
latency = dev_priv->wm.skl_latency[level];
if (skl_needs_memory_bw_wa(dev_priv) &&
- plane->base.state->fb->modifier ==
+ plane_state->uapi.fb->modifier ==
I915_FORMAT_MOD_X_TILED)
latency += 15;
@@ -3816,8 +3799,58 @@ bool intel_can_enable_sagv(struct intel_atomic_state *state)
* incur memory latencies higher than sagv_block_time_us we
* can't enable SAGV.
*/
- if (latency < dev_priv->sagv_block_time_us)
+ if (latency < dev_priv->sagv_block_time_us) {
+ DRM_DEBUG_KMS("Latency %d < sagv block time %d, no SAGV for pipe %c\n",
+ latency, dev_priv->sagv_block_time_us, pipe_name(crtc->pipe));
return false;
+ }
+ }
+
+ return true;
+}
+
+static bool skl_can_enable_sagv_on_pipe(struct intel_crtc_state *crtc_state)
+{
+ struct intel_atomic_state *state = to_intel_atomic_state(crtc_state->uapi.state);
+
+ /*
+ * It has been recommended that for Gen 9 we switch SAGV off when
+ * multiple pipes are used.
+ */
+ if (hweight8(state->active_pipes) > 1)
+ return false;
+
+ /*
+ * Besides active pipe limitation, rest of checks pretty much match ICL
+ * so no need to duplicate code
+ */
+ return icl_can_enable_sagv_on_pipe(crtc_state);
+}
+
+bool intel_can_enable_sagv(struct intel_atomic_state *state)
+{
+ struct drm_device *dev = state->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct intel_crtc *crtc;
+ struct intel_crtc_state *crtc_state;
+ int i;
+
+ if (!intel_has_sagv(dev_priv))
+ return false;
+
+ /*
+ * If there are no active CRTCs, no additional checks need be performed
+ */
+ if (hweight8(state->active_pipes) == 0)
+ return true;
+
+ for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+ if (INTEL_GEN(dev_priv) <= 9) {
+ if (!skl_can_enable_sagv_on_pipe(crtc_state))
+ return false;
+ } else if (!icl_can_enable_sagv_on_pipe(crtc_state)) {
+ return false;
+ }
}
return true;
--
2.24.1.485.gad05a3d8e5
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