[Intel-gfx] [PATCH 3/5] drm/i915/sprite: Make plane switching asynchronous
Chris Wilson
chris at chris-wilson.co.uk
Wed Apr 18 18:57:42 CEST 2012
Queue the unpinning of the current plane object to after the next
vblank. For special case benchmarks and others apps that may call
set_plane at a high frequency, we can unpin their objects directly
unless they are "live".
Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_reg.h | 4 ++
drivers/gpu/drm/i915/intel_display.c | 2 +-
drivers/gpu/drm/i915/intel_drv.h | 3 ++
drivers/gpu/drm/i915/intel_sprite.c | 67 ++++++++++++++++++++++++----------
4 files changed, 55 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5ac9837..a4c801e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2988,6 +2988,7 @@
#define DVSSTRIDE(pipe) _PIPE(pipe, _DVSASTRIDE, _DVSBSTRIDE)
#define DVSPOS(pipe) _PIPE(pipe, _DVSAPOS, _DVSBPOS)
#define DVSSURF(pipe) _PIPE(pipe, _DVSASURF, _DVSBSURF)
+#define DVSSURFLIVE(pipe) _PIPE(pipe, _DVSASURFLIVE, _DVSBSURFLIVE)
#define DVSKEYMAX(pipe) _PIPE(pipe, _DVSAKEYMAXVAL, _DVSBKEYMAXVAL)
#define DVSSIZE(pipe) _PIPE(pipe, _DVSASIZE, _DVSBSIZE)
#define DVSSCALE(pipe) _PIPE(pipe, _DVSASCALE, _DVSBSCALE)
@@ -3028,6 +3029,7 @@
#define _SPRA_SURF 0x7029c
#define _SPRA_KEYMAX 0x702a0
#define _SPRA_TILEOFF 0x702a4
+#define _SPRA_SURFLIVE 0x702ac
#define _SPRA_SCALE 0x70304
#define SPRITE_SCALE_ENABLE (1<<31)
#define SPRITE_FILTER_MASK (3<<29)
@@ -3048,6 +3050,7 @@
#define _SPRB_SURF 0x7129c
#define _SPRB_KEYMAX 0x712a0
#define _SPRB_TILEOFF 0x712a4
+#define _SPRB_SURFLIVE 0x712ac
#define _SPRB_SCALE 0x71304
#define _SPRB_GAMC 0x71400
@@ -3059,6 +3062,7 @@
#define SPRKEYVAL(pipe) _PIPE(pipe, _SPRA_KEYVAL, _SPRB_KEYVAL)
#define SPRKEYMSK(pipe) _PIPE(pipe, _SPRA_KEYMSK, _SPRB_KEYMSK)
#define SPRSURF(pipe) _PIPE(pipe, _SPRA_SURF, _SPRB_SURF)
+#define SPRSURFLIVE(pipe) _PIPE(pipe, _SPRA_SURFLIVE, _SPRB_SURFLIVE)
#define SPRKEYMAX(pipe) _PIPE(pipe, _SPRA_KEYMAX, _SPRB_KEYMAX)
#define SPRTILEOFF(pipe) _PIPE(pipe, _SPRA_TILEOFF, _SPRB_TILEOFF)
#define SPRSCALE(pipe) _PIPE(pipe, _SPRA_SCALE, _SPRB_SCALE)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 03e5d86..edc5c9b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1959,7 +1959,7 @@ static void intel_crtc_unpin_work_fn(struct intel_crtc *crtc, void *obj)
mutex_unlock(&dev->struct_mutex);
}
-static void
+void
intel_crtc_queue_unpin(struct intel_crtc *crtc,
struct drm_i915_gem_object *obj)
{
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 5ca07e0..e839a67 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -210,6 +210,7 @@ struct intel_plane {
struct drm_intel_sprite_colorkey *key);
void (*get_colorkey)(struct drm_plane *plane,
struct drm_intel_sprite_colorkey *key);
+ u32 (*current_surface)(struct drm_plane *plane);
};
struct intel_watermark_params {
@@ -364,6 +365,8 @@ extern void intel_panel_disable_backlight(struct drm_device *dev);
extern void intel_panel_destroy_backlight(struct drm_device *dev);
extern enum drm_connector_status intel_panel_detect(struct drm_device *dev);
+extern void intel_crtc_queue_unpin(struct intel_crtc *crtc,
+ struct drm_i915_gem_object *obj);
extern void intel_crtc_load_lut(struct drm_crtc *crtc);
extern void intel_encoder_prepare(struct drm_encoder *encoder);
extern void intel_encoder_commit(struct drm_encoder *encoder);
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index fbf03b9..11545ca 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -207,6 +207,16 @@ ivb_get_colorkey(struct drm_plane *plane, struct drm_intel_sprite_colorkey *key)
key->flags = I915_SET_COLORKEY_NONE;
}
+static u32
+ivb_current_surface(struct drm_plane *plane)
+{
+ struct intel_plane *intel_plane;
+
+ intel_plane = to_intel_plane(plane);
+
+ return SPRSURFLIVE(intel_plane->pipe);
+}
+
static void
ilk_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb,
struct drm_i915_gem_object *obj, int crtc_x, int crtc_y,
@@ -387,6 +397,35 @@ ilk_get_colorkey(struct drm_plane *plane, struct drm_intel_sprite_colorkey *key)
key->flags = I915_SET_COLORKEY_NONE;
}
+static u32
+ilk_current_surface(struct drm_plane *plane)
+{
+ struct intel_plane *intel_plane;
+
+ intel_plane = to_intel_plane(plane);
+
+ return DVSSURFLIVE(intel_plane->pipe);
+}
+
+static void
+intel_plane_queue_unpin(struct intel_plane *plane,
+ struct drm_i915_gem_object *obj)
+{
+ /*
+ * If the surface is currently being scanned out, we need to
+ * wait until the next vblank event latches in the new base address
+ * before we unpin it, or we may end up displaying the wrong data.
+ * However, if the old object isn't currently 'live', we can just
+ * unpin right away.
+ */
+ if (plane->current_surface(&plane->base) != obj->gtt_offset) {
+ intel_unpin_fb_obj(obj);
+ return;
+ }
+
+ intel_crtc_queue_unpin(to_intel_crtc(plane->base.crtc), obj);
+}
+
static int
intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
struct drm_framebuffer *fb, int crtc_x, int crtc_y,
@@ -492,20 +531,8 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
}
/* Unpin old obj after new one is active to avoid ugliness */
- if (old_obj) {
- /*
- * It's fairly common to simply update the position of
- * an existing object. In that case, we don't need to
- * wait for vblank to avoid ugliness, we only need to
- * do the pin & ref bookkeeping.
- */
- if (old_obj != obj) {
- mutex_unlock(&dev->struct_mutex);
- intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe);
- mutex_lock(&dev->struct_mutex);
- }
- intel_unpin_fb_obj(old_obj);
- }
+ if (old_obj)
+ intel_plane_queue_unpin(intel_plane, old_obj);
out_unlock:
mutex_unlock(&dev->struct_mutex);
@@ -527,14 +554,12 @@ intel_disable_plane(struct drm_plane *plane)
intel_plane->disable_plane(plane);
- if (!intel_plane->obj)
- goto out;
-
mutex_lock(&dev->struct_mutex);
- intel_unpin_fb_obj(intel_plane->obj);
- intel_plane->obj = NULL;
+ if (intel_plane->obj) {
+ intel_plane_queue_unpin(intel_plane, intel_plane->obj);
+ intel_plane->obj = NULL;
+ }
mutex_unlock(&dev->struct_mutex);
-out:
return ret;
}
@@ -658,6 +683,7 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe)
intel_plane->disable_plane = ilk_disable_plane;
intel_plane->update_colorkey = ilk_update_colorkey;
intel_plane->get_colorkey = ilk_get_colorkey;
+ intel_plane->current_surface = ilk_current_surface;
if (IS_GEN6(dev)) {
plane_formats = snb_plane_formats;
@@ -674,6 +700,7 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe)
intel_plane->disable_plane = ivb_disable_plane;
intel_plane->update_colorkey = ivb_update_colorkey;
intel_plane->get_colorkey = ivb_get_colorkey;
+ intel_plane->current_surface = ivb_current_surface;
plane_formats = snb_plane_formats;
num_plane_formats = ARRAY_SIZE(snb_plane_formats);
--
1.7.10
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