drm/i915/skl: Implement queue_flip

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
v3: Rebase on top of nightly (minor conflict in i915_reg.h)
v4: Remove code that is now part of intel_crtc_page_flip()
    Don't use BUG() in default:
    Use intel_crtc->unpin_work->gtt_offset
    (Paulo)

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index c443008..2bdfe08 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -248,6 +248,16 @@
 #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 c60bfbd..8f47b98 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9480,6 +9480,69 @@ 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 intel_crtc *intel_crtc = to_intel_crtc(crtc);
+       uint32_t plane = 0, stride;
+       int ret;
+
+       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:
+               WARN_ONCE(1, "unknown plane in flip command\n");
+               return -ENODEV;
+       }
+
+       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:
+               WARN_ONCE(1, "unknown tiling in flip command\n");
+               return -ENODEV;
+       }
+
+       ret = intel_ring_begin(ring, 10);
+       if (ret)
+               return ret;
+
+       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, intel_crtc->unpin_work->gtt_offset);
+
+       intel_mark_page_flip_active(intel_crtc);
+       __intel_ring_advance(ring);
+
+       return 0;
+}
+
 static int intel_default_queue_flip(struct drm_device *dev,
                                    struct drm_crtc *crtc,
                                    struct drm_framebuffer *fb,
@@ -12648,6 +12711,9 @@ 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);