[PATCH 74/89] drm/i915/skl: Implement queue_flip

Damien Lespiau
2014-09-04T11:29:11Z

A few bits have changed in MI_DISPLAY_FLIP to accomodate the new planes.
DE_RRMR seems to have kept its plane flip bits backward compatible.

v2: Rebase on top of nightly
v2: Rebase on top of nightly (minor conflict in i915_reg.h)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 10 +++++
drivers/gpu/drm/i915/intel_display.c | 78 ++++++++++++++++++++++++++++++++++++
2 files changed, 88 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 84a0de6..176e84e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -240,6 +240,16 @@
#define MI_DISPLAY_FLIP_IVB_SPRITE_B (3 << 19)
#define MI_DISPLAY_FLIP_IVB_PLANE_C (4 << 19)
#define MI_DISPLAY_FLIP_IVB_SPRITE_C (5 << 19)
+/* SKL ones */
+#define MI_DISPLAY_FLIP_SKL_PLANE_1_A (0 << 8)
+#define MI_DISPLAY_FLIP_SKL_PLANE_1_B (1 << 8)
+#define MI_DISPLAY_FLIP_SKL_PLANE_1_C (2 << 8)
+#define MI_DISPLAY_FLIP_SKL_PLANE_2_A (4 << 8)
+#define MI_DISPLAY_FLIP_SKL_PLANE_2_B (5 << 8)
+#define MI_DISPLAY_FLIP_SKL_PLANE_2_C (6 << 8)
+#define MI_DISPLAY_FLIP_SKL_PLANE_3_A (7 << 8)
+#define MI_DISPLAY_FLIP_SKL_PLANE_3_B (8 << 8)
+#define MI_DISPLAY_FLIP_SKL_PLANE_3_C (9 << 8)
#define MI_SEMAPHORE_MBOX MI_INSTR(0x16, 1) /* gen6, gen7 */
#define MI_SEMAPHORE_GLOBAL_GTT (1<<22)
#define MI_SEMAPHORE_UPDATE (1<<21)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index abd4201..393bd19 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9913,6 +9913,81 @@ static int intel_queue_mmio_flip(struct drm_device *dev,
return 0;
}

+static int intel_gen9_queue_flip(struct drm_device *dev,
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_i915_gem_object *obj,
+ struct intel_engine_cs *ring,
+ uint32_t flags)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ uint32_t plane = 0, stride;
+ int ret;
+
+ ring = obj->ring;
+ if (ring == NULL || ring->id != BCS)
+ ring = &dev_priv->ring[RCS];
+
+ ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
+ if (ret)
+ goto err;
+
+ switch(intel_crtc->pipe) {
+ case PIPE_A:
+ plane = MI_DISPLAY_FLIP_SKL_PLANE_1_A;
+ break;
+ case PIPE_B:
+ plane = MI_DISPLAY_FLIP_SKL_PLANE_1_B;
+ break;
+ case PIPE_C:
+ plane = MI_DISPLAY_FLIP_SKL_PLANE_1_C;
+ break;
+ default:
+ BUG();
+ }
+
+ switch (obj->tiling_mode) {
+ case I915_TILING_NONE:
+ stride = fb->pitches[0] >> 6;
+ break;
+ case I915_TILING_X:
+ stride = fb->pitches[0] >> 9;
+ break;
+ default:
+ BUG();
+ }
+
+ ret = intel_ring_begin(ring, 10);
+ if (ret)
+ goto err_unpin;
+
+ intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
+ intel_ring_emit(ring, DERRMR);
+ intel_ring_emit(ring, ~(DERRMR_PIPEA_PRI_FLIP_DONE |
+ DERRMR_PIPEB_PRI_FLIP_DONE |
+ DERRMR_PIPEC_PRI_FLIP_DONE));
+ intel_ring_emit(ring, MI_STORE_REGISTER_MEM_GEN8(1) |
+ MI_SRM_LRM_GLOBAL_GTT);
+ intel_ring_emit(ring, DERRMR);
+ intel_ring_emit(ring, ring->scratch.gtt_offset + 256);
+ intel_ring_emit(ring, 0);
+
+ intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | plane);
+ intel_ring_emit(ring, stride << 6 | obj->tiling_mode);
+ intel_ring_emit(ring, i915_gem_obj_ggtt_offset(obj));
+
+ intel_mark_page_flip_active(intel_crtc);
+ __intel_ring_advance(ring);
+
+ return 0;
+
+err_unpin:
+ intel_unpin_fb_obj(obj);
+err:
+ return ret;
+}
+
static int intel_default_queue_flip(struct drm_device *dev,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
@@ -12740,6 +12815,9 @@ static void intel_init_display(struct drm_device *dev)
case 8: /* FIXME(BDW): Check that the gen8 RCS flip works. */
dev_priv->display.queue_flip = intel_gen7_queue_flip;
break;
+ case 9:
+ dev_priv->display.queue_flip = intel_gen9_queue_flip;
+ break;
}

intel_panel_init_backlight_funcs(dev);
--
1.8.3.1