drm/msm/mdp5: rip out plane->pending tracking

It would race between userspace thread and commit worker.  Ie. vblank
irq would trigger event and userspace could begin the next atomic
update, before the commit worker had a chance to clear the pending
flag.

If we do end up needing something to prevent userspace from trying
another pageflip before getting vblank event, it should probably be
implemented as a pending_planes bitmask, similar to pending_crtcs.  See
start_atomic() and end_atomic().

Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
index 5f6cd87..c396d45 100644 (file)
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
@@ -119,13 +119,7 @@ static void mdp5_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *st
 
 static void mdp5_complete_commit(struct msm_kms *kms, struct drm_atomic_state *state)
 {
-       int i;
        struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
-       struct drm_plane *plane;
-       struct drm_plane_state *plane_state;
-
-       for_each_plane_in_state(state, plane, plane_state, i)
-               mdp5_plane_complete_commit(plane, plane_state);
 
        if (mdp5_kms->smp)
                mdp5_smp_complete_commit(mdp5_kms->smp, &mdp5_kms->state->smp);

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h
index 17b0cc1..cdfc63d 100644 (file)
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h
@@ -104,8 +104,6 @@ struct mdp5_plane_state {
 
        /* assigned by crtc blender */
        enum mdp_mixer_stage_id stage;
-
-       bool pending : 1;
 };
 #define to_mdp5_plane_state(x) \
                container_of(x, struct mdp5_plane_state, base)
@@ -232,8 +230,6 @@ int mdp5_irq_domain_init(struct mdp5_kms *mdp5_kms);
 void mdp5_irq_domain_fini(struct mdp5_kms *mdp5_kms);
 
 uint32_t mdp5_plane_get_flush(struct drm_plane *plane);
-void mdp5_plane_complete_commit(struct drm_plane *plane,
-       struct drm_plane_state *state);
 enum mdp5_pipe mdp5_plane_pipe(struct drm_plane *plane);
 struct drm_plane *mdp5_plane_init(struct drm_device *dev, bool primary);
 

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
index c099da7..25d9d0a 100644 (file)
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -179,7 +179,6 @@ mdp5_plane_atomic_print_state(struct drm_printer *p,
        drm_printf(p, "\tzpos=%u\n", pstate->zpos);
        drm_printf(p, "\talpha=%u\n", pstate->alpha);
        drm_printf(p, "\tstage=%s\n", stage2name(pstate->stage));
-       drm_printf(p, "\tpending=%u\n", pstate->pending);
 }
 
 static void mdp5_plane_reset(struct drm_plane *plane)
@@ -220,8 +219,6 @@ mdp5_plane_duplicate_state(struct drm_plane *plane)
        if (mdp5_state && mdp5_state->base.fb)
                drm_framebuffer_reference(mdp5_state->base.fb);
 
-       mdp5_state->pending = false;
-
        return &mdp5_state->base;
 }
 
@@ -288,13 +285,6 @@ static int mdp5_plane_atomic_check(struct drm_plane *plane,
        DBG("%s: check (%d -> %d)", plane->name,
                        plane_enabled(old_state), plane_enabled(state));
 
-       /* We don't allow faster-than-vblank updates.. if we did add this
-        * some day, we would need to disallow in cases where hwpipe
-        * changes
-        */
-       if (WARN_ON(to_mdp5_plane_state(old_state)->pending))
-               return -EBUSY;
-
        max_width = config->hw->lm.max_width << 16;
        max_height = config->hw->lm.max_height << 16;
 
@@ -370,12 +360,9 @@ static void mdp5_plane_atomic_update(struct drm_plane *plane,
                                     struct drm_plane_state *old_state)
 {
        struct drm_plane_state *state = plane->state;
-       struct mdp5_plane_state *mdp5_state = to_mdp5_plane_state(state);
 
        DBG("%s: update", plane->name);
 
-       mdp5_state->pending = true;
-
        if (plane_enabled(state)) {
                int ret;
 
@@ -851,15 +838,6 @@ uint32_t mdp5_plane_get_flush(struct drm_plane *plane)
        return pstate->hwpipe->flush_mask;
 }
 
-/* called after vsync in thread context */
-void mdp5_plane_complete_commit(struct drm_plane *plane,
-       struct drm_plane_state *state)
-{
-       struct mdp5_plane_state *pstate = to_mdp5_plane_state(plane->state);
-
-       pstate->pending = false;
-}
-
 /* initialize plane */
 struct drm_plane *mdp5_plane_init(struct drm_device *dev, bool primary)
 {