Hi,
On 05/16/2017 08:14 PM, Archit Taneja wrote:
On 5/13/2017 12:40 AM, Gustavo Padovan wrote:
From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
Add support to async updates of cursors by using the new atomic
interface for that. Basically what this commit does is do what
mdp5_update_cursor_plane_legacy() did but through atomic.
Works well on DB820c (which has a APQ8096 SoC).
Tested-by: Archit Taneja <architt@xxxxxxxxxxxxxx>
Actually, after some more thorough testing, I found one issue, mentioned below.
v3: move size checks back to drivers (Ville Syrjälä)
v2: move fb setting to core and use new state (Eric Anholt)
Cc: Rob Clark <robdclark@xxxxxxxxx>
Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c | 151 +++++++++++++-----------------
1 file changed, 63 insertions(+), 88 deletions(-)
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
index a38c5fe..07106c1 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -33,15 +33,6 @@ static int mdp5_plane_mode_set(struct drm_plane *plane,
struct drm_crtc *crtc, struct drm_framebuffer *fb,
struct drm_rect *src, struct drm_rect *dest);
-static int mdp5_update_cursor_plane_legacy(struct drm_plane *plane,
- struct drm_crtc *crtc,
- struct drm_framebuffer *fb,
- int crtc_x, int crtc_y,
- unsigned int crtc_w, unsigned int crtc_h,
- uint32_t src_x, uint32_t src_y,
- uint32_t src_w, uint32_t src_h,
- struct drm_modeset_acquire_ctx *ctx);
-
static struct mdp5_kms *get_kms(struct drm_plane *plane)
{
struct msm_drm_private *priv = plane->dev->dev_private;
@@ -257,7 +248,7 @@ static const struct drm_plane_funcs mdp5_plane_funcs = {
};
static const struct drm_plane_funcs mdp5_cursor_plane_funcs = {
- .update_plane = mdp5_update_cursor_plane_legacy,
+ .update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = mdp5_plane_destroy,
.set_property = drm_atomic_helper_plane_set_property,
@@ -484,11 +475,73 @@ static void mdp5_plane_atomic_update(struct drm_plane *plane,
}
}
+static int mdp5_plane_atomic_async_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct mdp5_plane_state *mdp5_state = to_mdp5_plane_state(state);
+ struct drm_crtc_state *crtc_state;
+
+ crtc_state = drm_atomic_get_existing_crtc_state(state->state,
+ state->crtc);
I see a kernel splat here (a NULL pointer dereference). The async_check
function assumes that there is always going to be a plane_state->crtc
available. This doesn't seem to be the case at least in the
drm_atomic_helper_disable_plane() path. Moving the check to set
legacy_cursor_update after calling __drm_atomic_helper_disable_plane()
seems to fix the issue. Do you think it's a legit fix?
One more point w.r.t msm driver is that we don't use the default
drm_atomic_helper_commit() for our atomic_commit op. So I had to
call drm_atomic_helper_async_commit() from our atomic_commit
implementation
(i.e, in msm_atomic_commit in drivers/gpu/drm/msm/msm_atomic.c)
Thanks,
Archit
+ if (WARN_ON(!crtc_state))
+ return -EINVAL;
+
+ if (!crtc_state->active)
+ return -EINVAL;
+
+ mdp5_state = to_mdp5_plane_state(state);
+
+ /* don't use fast path if we don't have a hwpipe allocated yet */
+ if (!mdp5_state->hwpipe)
+ return -EINVAL;
+
+ /* only allow changing of position(crtc x/y or src x/y) in fast path */
+ if (plane->state->crtc != state->crtc ||
+ plane->state->src_w != state->src_w ||
+ plane->state->src_h != state->src_h ||
+ plane->state->crtc_w != state->crtc_w ||
+ plane->state->crtc_h != state->crtc_h ||
+ !plane->state->fb ||
+ plane->state->fb != state->fb)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void mdp5_plane_atomic_async_update(struct drm_plane *plane,
+ struct drm_plane_state *new_state)
+{
+ plane->state->src_x = new_state->src_x;
+ plane->state->src_y = new_state->src_y;
+ plane->state->crtc_x = new_state->crtc_x;
+ plane->state->crtc_y = new_state->crtc_y;
+
+ if (plane_enabled(new_state)) {
+ struct mdp5_ctl *ctl;
+ struct mdp5_pipeline *pipeline =
+ mdp5_crtc_get_pipeline(plane->crtc);
+ int ret;
+
+ ret = mdp5_plane_mode_set(plane, new_state->crtc, new_state->fb,
+ &new_state->src, &new_state->dst);
+ WARN_ON(ret < 0);
+
+ ctl = mdp5_crtc_get_ctl(new_state->crtc);
+
+ mdp5_ctl_commit(ctl, pipeline, mdp5_plane_get_flush(plane));
+ }
+
+ *to_mdp5_plane_state(plane->state) =
+ *to_mdp5_plane_state(new_state);
+}
+
static const struct drm_plane_helper_funcs mdp5_plane_helper_funcs = {
.prepare_fb = mdp5_plane_prepare_fb,
.cleanup_fb = mdp5_plane_cleanup_fb,
.atomic_check = mdp5_plane_atomic_check,
.atomic_update = mdp5_plane_atomic_update,
+ .atomic_async_check = mdp5_plane_atomic_async_check,
+ .atomic_async_update = mdp5_plane_atomic_async_update,
};
static void set_scanout_locked(struct mdp5_kms *mdp5_kms,
@@ -997,84 +1050,6 @@ static int mdp5_plane_mode_set(struct drm_plane *plane,
return ret;
}
-static int mdp5_update_cursor_plane_legacy(struct drm_plane *plane,
- struct drm_crtc *crtc, struct drm_framebuffer *fb,
- int crtc_x, int crtc_y,
- unsigned int crtc_w, unsigned int crtc_h,
- uint32_t src_x, uint32_t src_y,
- uint32_t src_w, uint32_t src_h,
- struct drm_modeset_acquire_ctx *ctx)
-{
- struct drm_plane_state *plane_state, *new_plane_state;
- struct mdp5_plane_state *mdp5_pstate;
- struct drm_crtc_state *crtc_state = crtc->state;
- int ret;
-
- if (!crtc_state->active || drm_atomic_crtc_needs_modeset(crtc_state))
- goto slow;
-
- plane_state = plane->state;
- mdp5_pstate = to_mdp5_plane_state(plane_state);
-
- /* don't use fast path if we don't have a hwpipe allocated yet */
- if (!mdp5_pstate->hwpipe)
- goto slow;
-
- /* only allow changing of position(crtc x/y or src x/y) in fast path */
- if (plane_state->crtc != crtc ||
- plane_state->src_w != src_w ||
- plane_state->src_h != src_h ||
- plane_state->crtc_w != crtc_w ||
- plane_state->crtc_h != crtc_h ||
- !plane_state->fb ||
- plane_state->fb != fb)
- goto slow;
-
- new_plane_state = mdp5_plane_duplicate_state(plane);
- if (!new_plane_state)
- return -ENOMEM;
-
- new_plane_state->src_x = src_x;
- new_plane_state->src_y = src_y;
- new_plane_state->src_w = src_w;
- new_plane_state->src_h = src_h;
- new_plane_state->crtc_x = crtc_x;
- new_plane_state->crtc_y = crtc_y;
- new_plane_state->crtc_w = crtc_w;
- new_plane_state->crtc_h = crtc_h;
-
- ret = mdp5_plane_atomic_check_with_state(crtc_state, new_plane_state);
- if (ret)
- goto slow_free;
-
- if (new_plane_state->visible) {
- struct mdp5_ctl *ctl;
- struct mdp5_pipeline *pipeline = mdp5_crtc_get_pipeline(crtc);
-
- ret = mdp5_plane_mode_set(plane, crtc, fb,
- &new_plane_state->src,
- &new_plane_state->dst);
- WARN_ON(ret < 0);
-
- ctl = mdp5_crtc_get_ctl(crtc);
-
- mdp5_ctl_commit(ctl, pipeline, mdp5_plane_get_flush(plane));
- }
-
- *to_mdp5_plane_state(plane_state) =
- *to_mdp5_plane_state(new_plane_state);
-
- mdp5_plane_destroy_state(plane, new_plane_state);
-
- return 0;
-slow_free:
- mdp5_plane_destroy_state(plane, new_plane_state);
-slow:
- return drm_atomic_helper_update_plane(plane, crtc, fb,
- crtc_x, crtc_y, crtc_w, crtc_h,
- src_x, src_y, src_w, src_h, ctx);
-}
-
/*
* Use this func and the one below only after the atomic state has been
* successfully swapped
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 19e5a4f5529a..b384c985cd08 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2230,13 +2230,14 @@ int drm_atomic_helper_disable_plane(struct drm_plane *plane,
goto fail;
}
- if (plane_state->crtc && (plane == plane->crtc->cursor))
- plane_state->state->legacy_cursor_update = true;
-
ret = __drm_atomic_helper_disable_plane(plane, plane_state);
if (ret != 0)
goto fail;
+ if (plane_state->crtc && (plane == plane->crtc->cursor))
+ plane_state->state->legacy_cursor_update = true;
+
+
ret = drm_atomic_commit(state);
fail:
drm_atomic_state_put(state);
--
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a Linux Foundation Collaborative Project
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