[Intel-gfx] [RFC PATCH] drm/i915: Add a cursor hack to allow converting legacy page flip to atomic.
Maarten Lankhorst
maarten.lankhorst at linux.intel.com
Thu Nov 24 15:35:35 UTC 2016
Do something similar to vc4, only allow updating the cursor state
in-place through a fastpath when the watermarks are unaffected. This
will allow cursor movement to be smooth, but changing cursor size or
showing/hiding cursor will still fall back so watermarks can be updated.
Not completely tested yet and doesn't handle fence structs well,
quite likely leaks.. so I'm sending this out as RFC only.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
drivers/gpu/drm/i915/intel_atomic_plane.c | 47 +++++++-----
drivers/gpu/drm/i915/intel_display.c | 116 +++++++++++++++++++++++++++++-
drivers/gpu/drm/i915/intel_drv.h | 2 +
3 files changed, 146 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
index dbe9fb41ae53..60d75ce8a989 100644
--- a/drivers/gpu/drm/i915/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
@@ -103,36 +103,24 @@ intel_plane_destroy_state(struct drm_plane *plane,
drm_atomic_helper_plane_destroy_state(plane, state);
}
-static int intel_plane_atomic_check(struct drm_plane *plane,
- struct drm_plane_state *state)
+int intel_plane_atomic_check_with_state(struct intel_crtc_state *crtc_state,
+ struct intel_plane_state *intel_state)
{
+ struct drm_plane *plane = intel_state->base.plane;
struct drm_i915_private *dev_priv = to_i915(plane->dev);
- struct drm_crtc *crtc = state->crtc;
- struct intel_crtc *intel_crtc;
- struct intel_crtc_state *crtc_state;
+ struct drm_plane_state *state = &intel_state->base;
struct intel_plane *intel_plane = to_intel_plane(plane);
- struct intel_plane_state *intel_state = to_intel_plane_state(state);
- struct drm_crtc_state *drm_crtc_state;
int ret;
- crtc = crtc ? crtc : plane->state->crtc;
- intel_crtc = to_intel_crtc(crtc);
-
/*
* Both crtc and plane->crtc could be NULL if we're updating a
* property while the plane is disabled. We don't actually have
* anything driver-specific we need to test in that case, so
* just return success.
*/
- if (!crtc)
+ if (!intel_state->base.crtc && !plane->state->crtc)
return 0;
- drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
- if (WARN_ON(!drm_crtc_state))
- return -EINVAL;
-
- crtc_state = to_intel_crtc_state(drm_crtc_state);
-
/* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
intel_state->clip.x1 = 0;
intel_state->clip.y1 = 0;
@@ -184,6 +172,31 @@ static int intel_plane_atomic_check(struct drm_plane *plane,
return intel_plane_atomic_calc_changes(&crtc_state->base, state);
}
+static int intel_plane_atomic_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct drm_crtc *crtc = state->crtc;
+ struct drm_crtc_state *drm_crtc_state;
+
+ crtc = crtc ? crtc : plane->state->crtc;
+
+ /*
+ * Both crtc and plane->crtc could be NULL if we're updating a
+ * property while the plane is disabled. We don't actually have
+ * anything driver-specific we need to test in that case, so
+ * just return success.
+ */
+ if (!crtc)
+ return 0;
+
+ drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
+ if (WARN_ON(!drm_crtc_state))
+ return -EINVAL;
+
+ return intel_plane_atomic_check_with_state(to_intel_crtc_state(drm_crtc_state),
+ to_intel_plane_state(state));
+}
+
static void intel_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e9741fc8b04e..919d30996f3f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14689,7 +14689,7 @@ static const struct drm_crtc_funcs intel_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.set_property = drm_atomic_helper_crtc_set_property,
.destroy = intel_crtc_destroy,
- .page_flip = intel_crtc_page_flip,
+ .page_flip = drm_atomic_helper_page_flip,
.atomic_duplicate_state = intel_crtc_duplicate_state,
.atomic_destroy_state = intel_crtc_destroy_state,
};
@@ -14955,6 +14955,118 @@ const struct drm_plane_funcs intel_plane_funcs = {
.atomic_destroy_state = intel_plane_destroy_state,
};
+static int
+intel_legacy_cursor_update(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_i915_private *dev_priv = to_i915(crtc->dev);
+ int ret;
+ struct drm_plane_state *old_plane_state, *new_plane_state;
+ struct intel_plane *intel_plane = to_intel_plane(plane);
+ struct drm_framebuffer *old_fb;
+
+ old_plane_state = plane->state;
+ if (old_plane_state->crtc != crtc ||
+ old_plane_state->src_w != src_w ||
+ old_plane_state->src_h != src_h ||
+ old_plane_state->crtc_w != crtc_w ||
+ old_plane_state->crtc_h != crtc_h ||
+ !old_plane_state->visible ||
+ old_plane_state->fb->modifier != fb->modifier)
+ goto slow;
+
+ new_plane_state = intel_plane_duplicate_state(plane);
+ if (!new_plane_state)
+ return -ENOMEM;
+
+ drm_atomic_set_fb_for_plane(new_plane_state, fb);
+
+ 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 = intel_plane_atomic_check_with_state(to_intel_crtc_state(crtc->state),
+ to_intel_plane_state(new_plane_state));
+ if (ret)
+ return ret;
+
+ if (!new_plane_state->visible) {
+ intel_plane_destroy_state(plane, new_plane_state);
+ goto slow;
+ }
+
+ ret = mutex_lock_interruptible(&dev_priv->drm.struct_mutex);
+ if (ret)
+ return ret;
+
+ if (INTEL_INFO(dev_priv)->cursor_needs_physical) {
+ int align = IS_I830(dev_priv) ? 16 * 1024 : 256;
+
+ ret = i915_gem_object_attach_phys(intel_fb_obj(fb), align);
+ if (ret) {
+ DRM_DEBUG_KMS("failed to attach phys object\n");
+ return ret;
+ }
+ } else {
+ struct i915_vma *vma;
+
+ vma = intel_pin_and_fence_fb_obj(fb, new_plane_state->rotation);
+ if (IS_ERR(vma)) {
+ DRM_DEBUG_KMS("failed to pin object\n");
+
+ return PTR_ERR(vma);
+ }
+ }
+
+ old_fb = old_plane_state->fb;
+
+ i915_gem_track_fb(intel_fb_obj(old_fb), intel_fb_obj(fb),
+ intel_plane->frontbuffer_bit);
+
+ /* Swap plane state */
+ new_plane_state->state = old_plane_state->state;
+ *to_intel_plane_state(old_plane_state) = *to_intel_plane_state(new_plane_state);
+ new_plane_state->state = NULL;
+ new_plane_state->fb = old_fb;
+
+ intel_plane->update_plane(plane,
+ to_intel_crtc_state(crtc->state),
+ to_intel_plane_state(plane->state));
+
+ intel_cleanup_plane_fb(plane, new_plane_state);
+ mutex_unlock(&dev_priv->drm.struct_mutex);
+
+ intel_plane_destroy_state(plane, new_plane_state);
+
+ return 0;
+
+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);
+}
+
+static const struct drm_plane_funcs intel_cursor_plane_funcs = {
+ .update_plane = intel_legacy_cursor_update,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .destroy = intel_plane_destroy,
+ .set_property = drm_atomic_helper_plane_set_property,
+ .atomic_get_property = intel_plane_atomic_get_property,
+ .atomic_set_property = intel_plane_atomic_set_property,
+ .atomic_duplicate_state = intel_plane_duplicate_state,
+ .atomic_destroy_state = intel_plane_destroy_state,
+};
+
static struct intel_plane *
intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
{
@@ -15199,7 +15311,7 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
cursor->disable_plane = intel_disable_cursor_plane;
ret = drm_universal_plane_init(&dev_priv->drm, &cursor->base,
- 0, &intel_plane_funcs,
+ 0, &intel_cursor_plane_funcs,
intel_cursor_formats,
ARRAY_SIZE(intel_cursor_formats),
DRM_PLANE_TYPE_CURSOR,
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 8415f2f1117d..25911911c5ef 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1812,6 +1812,8 @@ struct drm_plane_state *intel_plane_duplicate_state(struct drm_plane *plane);
void intel_plane_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state);
extern const struct drm_plane_helper_funcs intel_plane_helper_funcs;
+int intel_plane_atomic_check_with_state(struct intel_crtc_state *crtc_state,
+ struct intel_plane_state *intel_state);
/* intel_color.c */
void intel_color_init(struct drm_crtc *crtc);
--
2.7.4
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