We are preparing for Xe driver. Xe driver doesn't have i915_sw_fence
implementation. Lets drop i915_sw_fence usage from display code and
use dma_fence interfaces directly.
For this purpose stack dma fences from related objects into old and new
plane states using drm_gem_plane_helper_prepare_fb. Then wait for these
stacked fences during atomic commit.
There is no be need for separate GPU reset handling in
intel_atomic_commit_fence_wait as the fences are signaled when GPU hang is
detected and GPU is being reset.
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_atomic.c | 3 -
.../gpu/drm/i915/display/intel_atomic_plane.c | 49 +++---------
drivers/gpu/drm/i915/display/intel_display.c | 78 ++++++-------------
.../drm/i915/display/intel_display_types.h | 2 -
4 files changed, 37 insertions(+), 95 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index 5d18145da279..ec0d5168b503 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -331,9 +331,6 @@ void intel_atomic_state_free(struct drm_atomic_state *_state)
drm_atomic_state_default_release(&state->base);
kfree(state->global_objs);
-
- i915_sw_fence_fini(&state->commit_ready);
-
kfree(state);
}
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
index b1074350616c..d4f9168ec42c 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
@@ -32,6 +32,7 @@
*/
#include <drm/drm_atomic_helper.h>
+#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_blend.h>
#include <drm/drm_fourcc.h>
@@ -1035,7 +1036,7 @@ intel_prepare_plane_fb(struct drm_plane *_plane,
struct intel_atomic_state *state =
to_intel_atomic_state(new_plane_state->uapi.state);
struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
- const struct intel_plane_state *old_plane_state =
+ struct intel_plane_state *old_plane_state =
intel_atomic_get_old_plane_state(state, plane);
struct drm_i915_gem_object *obj = intel_fb_obj(new_plane_state->hw.fb);
struct drm_i915_gem_object *old_obj = intel_fb_obj(old_plane_state->hw.fb);
@@ -1057,56 +1058,30 @@ intel_prepare_plane_fb(struct drm_plane *_plane,
* This should only fail upon a hung GPU, in which case we
* can safely continue.
*/
- if (new_crtc_state && intel_crtc_needs_modeset(new_crtc_state)) {
- ret = i915_sw_fence_await_reservation(&state->commit_ready,
- old_obj->base.resv,
- false, 0,
- GFP_KERNEL);
+ if (new_crtc_state && intel_crtc_needs_modeset(new_crtc_state) &&
+ !dma_resv_test_signaled(old_obj->base.resv,
+ dma_resv_usage_rw(false))) {
+ ret = drm_gem_plane_helper_prepare_fb(_plane, &old_plane_state->uapi);
if (ret < 0)
return ret;
}
}
- if (new_plane_state->uapi.fence) { /* explicit fencing */
- i915_gem_fence_wait_priority(new_plane_state->uapi.fence,
- &attr);
- ret = i915_sw_fence_await_dma_fence(&state->commit_ready,
- new_plane_state->uapi.fence,
- i915_fence_timeout(dev_priv),
- GFP_KERNEL);
- if (ret < 0)
- return ret;
- }
-
if (!obj)
return 0;
-
ret = intel_plane_pin_fb(new_plane_state);
if (ret)
return ret;
- i915_gem_object_wait_priority(obj, 0, &attr);
-
- if (!new_plane_state->uapi.fence) { /* implicit fencing */
- struct dma_resv_iter cursor;
- struct dma_fence *fence;
+ ret = drm_gem_plane_helper_prepare_fb(_plane, &new_plane_state->uapi);
+ if (ret < 0)
+ goto unpin_fb;
- ret = i915_sw_fence_await_reservation(&state->commit_ready,
- obj->base.resv, false,
- i915_fence_timeout(dev_priv),
- GFP_KERNEL);
- if (ret < 0)
- goto unpin_fb;
+ if (new_plane_state->uapi.fence) {
+ i915_gem_fence_wait_priority(new_plane_state->uapi.fence,
+ &attr);
- dma_resv_iter_begin(&cursor, obj->base.resv,
- DMA_RESV_USAGE_WRITE);
- dma_resv_for_each_fence_unlocked(&cursor, fence) {
- intel_display_rps_boost_after_vblank(new_plane_state->hw.crtc,
- fence);
- }
- dma_resv_iter_end(&cursor);
- } else {
intel_display_rps_boost_after_vblank(new_plane_state->hw.crtc,
new_plane_state->uapi.fence);
}
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 28d85e1e858e..48df0559df00 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -48,6 +48,7 @@
#include "g4x_dp.h"
#include "g4x_hdmi.h"
#include "hsw_ips.h"
+#include "i915_config.h"
#include "i915_drv.h"
#include "i915_reg.h"
#include "i915_utils.h"
@@ -7056,29 +7057,34 @@ void intel_atomic_helper_free_state_worker(struct work_struct *work)
static void intel_atomic_commit_fence_wait(struct intel_atomic_state *intel_state)
{
- struct wait_queue_entry wait_fence, wait_reset;
- struct drm_i915_private *dev_priv = to_i915(intel_state->base.dev);
-
- init_wait_entry(&wait_fence, 0);
- init_wait_entry(&wait_reset, 0);
- for (;;) {
- prepare_to_wait(&intel_state->commit_ready.wait,
- &wait_fence, TASK_UNINTERRUPTIBLE);
- prepare_to_wait(bit_waitqueue(&to_gt(dev_priv)->reset.flags,
- I915_RESET_MODESET),
- &wait_reset, TASK_UNINTERRUPTIBLE);
+ struct drm_i915_private *i915 = to_i915(intel_state->base.dev);
+ struct drm_plane *plane;
+ struct drm_plane_state *new_plane_state, *old_plane_state;
+ int ret, i;
+ for_each_oldnew_plane_in_state(&intel_state->base, plane,
+ old_plane_state, new_plane_state, i) {
+ if (new_plane_state->fence) {
+ ret = dma_fence_wait_timeout(new_plane_state->fence,
+ false,
+ i915_fence_timeout(i915));
+ if (ret <= 0)
+ break;
- if (i915_sw_fence_done(&intel_state->commit_ready) ||
- test_bit(I915_RESET_MODESET, &to_gt(dev_priv)->reset.flags))
- break;
+ dma_fence_put(new_plane_state->fence);
+ new_plane_state->fence = NULL;
+ }
+ if (old_plane_state->fence) {
+ ret = dma_fence_wait_timeout(old_plane_state->fence,
+ false,
+ i915_fence_timeout(i915));
+ if (ret <= 0)
+ break;
- schedule();
+ dma_fence_put(old_plane_state->fence);
+ old_plane_state->fence = NULL;
+ }
}
- finish_wait(&intel_state->commit_ready.wait, &wait_fence);
- finish_wait(bit_waitqueue(&to_gt(dev_priv)->reset.flags,
- I915_RESET_MODESET),
- &wait_reset);
}
static void intel_atomic_cleanup_work(struct work_struct *work)
@@ -7370,32 +7376,6 @@ static void intel_atomic_commit_work(struct work_struct *work)
intel_atomic_commit_tail(state);
}
-static int
-intel_atomic_commit_ready(struct i915_sw_fence *fence,
- enum i915_sw_fence_notify notify)
-{
- struct intel_atomic_state *state =
- container_of(fence, struct intel_atomic_state, commit_ready);
-
- switch (notify) {
- case FENCE_COMPLETE:
- /* we do blocking waits in the worker, nothing to do here */
- break;
- case FENCE_FREE:
- {
- struct drm_i915_private *i915 = to_i915(state->base.dev);
- struct intel_atomic_helper *helper =
- &i915->display.atomic_helper;
-
- if (llist_add(&state->freed, &helper->free_list))
- queue_work(i915->unordered_wq, &helper->free_work);
- break;
- }
- }
-
- return NOTIFY_DONE;
-}
-
static void intel_atomic_track_fbs(struct intel_atomic_state *state)
{
struct intel_plane_state *old_plane_state, *new_plane_state;
@@ -7418,10 +7398,6 @@ int intel_atomic_commit(struct drm_device *dev, struct drm_atomic_state *_state,
state->wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
- drm_atomic_state_get(&state->base);
- i915_sw_fence_init(&state->commit_ready,
- intel_atomic_commit_ready);
-
/*
* The intel_legacy_cursor_update() fast path takes care
* of avoiding the vblank waits for simple cursor
@@ -7454,7 +7430,6 @@ int intel_atomic_commit(struct drm_device *dev, struct drm_atomic_state *_state,
if (ret) {
drm_dbg_atomic(&dev_priv->drm,
"Preparing state failed with %i\n", ret);
- i915_sw_fence_commit(&state->commit_ready);
intel_runtime_pm_put(&dev_priv->runtime_pm, state->wakeref);
return ret;
}
@@ -7470,8 +7445,6 @@ int intel_atomic_commit(struct drm_device *dev, struct drm_atomic_state *_state,
struct intel_crtc *crtc;
int i;
- i915_sw_fence_commit(&state->commit_ready);
-
for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i)
intel_color_cleanup_commit(new_crtc_state);
@@ -7485,7 +7458,6 @@ int intel_atomic_commit(struct drm_device *dev, struct drm_atomic_state *_state,
drm_atomic_state_get(&state->base);
INIT_WORK(&state->base.commit_work, intel_atomic_commit_work);
- i915_sw_fence_commit(&state->commit_ready);
if (nonblock && state->modeset) {
queue_work(dev_priv->display.wq.modeset, &state->base.commit_work);
} else if (nonblock) {
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8d8b2f8d37a9..a685c527c7d1 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -670,8 +670,6 @@ struct intel_atomic_state {
bool rps_interactive;
- struct i915_sw_fence commit_ready;
-
struct llist_node freed;
};
