From 9d691c197631f152d7dc6788098f372b64d3bc43 Mon Sep 17 00:00:00 2001 From: Andrzej Hajda Date: Fri, 27 Jan 2023 16:30:02 +0100 Subject: [PATCH] drm/i915: implement async_flip mode per plane tracking MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Current implementation of async flip w/a relies on assumption that previous atomic commit contains valid information if async_flip is still enabled on the plane. It is incorrect. If previous commit did not modify the plane its state->uapi.async_flip can be false. As a result DMAR/PIPE errors can be observed: i915 0000:00:02.0: [drm] *ERROR* Fault errors on pipe A: 0x00000080 i915 0000:00:02.0: [drm] *ERROR* Fault errors on pipe A: 0x00000080 DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read NO_PASID] Request device [00:02.0] fault addr 0x0 [fault reason 0x06] PTE Read access is not set v2: update async_flip_planes in more reliable places (Ville) v3: reset async_flip_planes and do_async_flip in more scenarios (Ville) v4: move all resets to plane loops (Ville) Signed-off-by: Andrzej Hajda Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20230127153003.2225111-1-andrzej.hajda@intel.com --- drivers/gpu/drm/i915/display/intel_atomic_plane.c | 5 ++++- drivers/gpu/drm/i915/display/intel_color.c | 2 ++ drivers/gpu/drm/i915/display/intel_display.c | 9 ++++++--- drivers/gpu/drm/i915/display/intel_display_types.h | 3 +++ drivers/gpu/drm/i915/display/skl_watermark.c | 4 ++++ 5 files changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c index 1409bcf..3bd8f7e 100644 --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c @@ -363,6 +363,7 @@ void intel_plane_set_invisible(struct intel_crtc_state *crtc_state, crtc_state->scaled_planes &= ~BIT(plane->id); crtc_state->nv12_planes &= ~BIT(plane->id); crtc_state->c8_planes &= ~BIT(plane->id); + crtc_state->async_flip_planes &= ~BIT(plane->id); crtc_state->data_rate[plane->id] = 0; crtc_state->data_rate_y[plane->id] = 0; crtc_state->rel_data_rate[plane->id] = 0; @@ -582,8 +583,10 @@ static int intel_plane_atomic_calc_changes(const struct intel_crtc_state *old_cr intel_plane_is_scaled(new_plane_state)))) new_crtc_state->disable_lp_wm = true; - if (intel_plane_do_async_flip(plane, old_crtc_state, new_crtc_state)) + if (intel_plane_do_async_flip(plane, old_crtc_state, new_crtc_state)) { new_crtc_state->do_async_flip = true; + new_crtc_state->async_flip_planes |= BIT(plane->id); + } return 0; } diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c index 8d97c29..256f8ce 100644 --- a/drivers/gpu/drm/i915/display/intel_color.c +++ b/drivers/gpu/drm/i915/display/intel_color.c @@ -1500,6 +1500,8 @@ intel_color_add_affected_planes(struct intel_crtc_state *new_crtc_state) return PTR_ERR(plane_state); new_crtc_state->update_planes |= BIT(plane->id); + new_crtc_state->async_flip_planes = 0; + new_crtc_state->do_async_flip = false; /* plane control register changes blocked by CxSR */ if (HAS_GMCH(i915)) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 717ca3d..fcd3f1c 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -1252,7 +1252,8 @@ static void intel_crtc_async_flip_disable_wa(struct intel_atomic_state *state, intel_atomic_get_old_crtc_state(state, crtc); const struct intel_crtc_state *new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); - u8 update_planes = new_crtc_state->update_planes; + u8 disable_async_flip_planes = old_crtc_state->async_flip_planes & + ~new_crtc_state->async_flip_planes; const struct intel_plane_state *old_plane_state; struct intel_plane *plane; bool need_vbl_wait = false; @@ -1261,7 +1262,7 @@ static void intel_crtc_async_flip_disable_wa(struct intel_atomic_state *state, for_each_old_intel_plane_in_state(state, plane, old_plane_state, i) { if (plane->need_async_flip_disable_wa && plane->pipe == crtc->pipe && - update_planes & BIT(plane->id)) { + disable_async_flip_planes & BIT(plane->id)) { /* * Apart from the async flip bit we want to * preserve the old state for the plane. @@ -1378,7 +1379,7 @@ static void intel_pre_plane_update(struct intel_atomic_state *state, * WA for platforms where async address update enable bit * is double buffered and only latched at start of vblank. */ - if (old_crtc_state->uapi.async_flip && !new_crtc_state->uapi.async_flip) + if (old_crtc_state->async_flip_planes & ~new_crtc_state->async_flip_planes) intel_crtc_async_flip_disable_wa(state, crtc); } @@ -5939,6 +5940,8 @@ int intel_modeset_all_pipes(struct intel_atomic_state *state, return ret; crtc_state->update_planes |= crtc_state->active_planes; + crtc_state->async_flip_planes = 0; + crtc_state->do_async_flip = false; } return 0; diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 54c517c..9ccae7a 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1249,6 +1249,9 @@ struct intel_crtc_state { /* bitmask of planes that will be updated during the commit */ u8 update_planes; + /* bitmask of planes with async flip active */ + u8 async_flip_planes; + u8 framestart_delay; /* 1-4 */ u8 msa_timing_delay; /* 0-3 */ diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c index ae4e9e6..261cdab 100644 --- a/drivers/gpu/drm/i915/display/skl_watermark.c +++ b/drivers/gpu/drm/i915/display/skl_watermark.c @@ -2397,6 +2397,8 @@ skl_ddb_add_affected_planes(const struct intel_crtc_state *old_crtc_state, return PTR_ERR(plane_state); new_crtc_state->update_planes |= BIT(plane_id); + new_crtc_state->async_flip_planes = 0; + new_crtc_state->do_async_flip = false; } return 0; @@ -2754,6 +2756,8 @@ static int skl_wm_add_affected_planes(struct intel_atomic_state *state, return PTR_ERR(plane_state); new_crtc_state->update_planes |= BIT(plane_id); + new_crtc_state->async_flip_planes = 0; + new_crtc_state->do_async_flip = false; } return 0; -- 2.7.4