Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/media into drm-next

The series interleaves DRM and V4L2 patches due to dependencies between the R-
Car DU and VSP drivers. Mauro has acked all the V4L2 patches to go through
your tree, and they don't conflict with anything queued for v4.13 in his tree.
If I need to send any conflicting patches through Mauro's tree for v4.13, I'll
make sure to base them on this branch.

* 'drm/next/du' of git://linuxtv.org/pinchartl/media:
  drm: rcar-du: Map memory through the VSP device
  v4l: vsp1: Add API to map and unmap DRM buffers through the VSP
  v4l: vsp1: Map the DL and video buffers through the proper bus master
  v4l: rcar-fcp: Add an API to retrieve the FCP device
  v4l: rcar-fcp: Don't get/put module reference
  drm: rcar-du: Register a completion callback with VSP1
  v4l: vsp1: Extend VSP1 module API to allow DRM callbacks
  v4l: vsp1: Postpone frame end handling in event of display list race
  drm: rcar-du: Arm the page flip event after queuing the page flip

4 files changed, 97 insertions, 19 deletions

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 4ed6f2340af0..345eff72f581 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -378,7 +378,7 @@ static void rcar_du_crtc_update_planes(struct rcar_du_crtc *rcrtc)
  * Page Flip
  */
 
-static void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc)
+void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc)
 {
 	struct drm_pending_vblank_event *event;
 	struct drm_device *dev = rcrtc->crtc.dev;
@@ -581,17 +581,6 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc *crtc,
 				      struct drm_crtc_state *old_crtc_state)
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
-	struct drm_device *dev = rcrtc->crtc.dev;
-	unsigned long flags;
-
-	if (crtc->state->event) {
-		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
-
-		spin_lock_irqsave(&dev->event_lock, flags);
-		rcrtc->event = crtc->state->event;
-		crtc->state->event = NULL;
-		spin_unlock_irqrestore(&dev->event_lock, flags);
-	}
 
 	if (rcar_du_has(rcrtc->group->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
 		rcar_du_vsp_atomic_begin(rcrtc);
@@ -601,9 +590,20 @@ static void rcar_du_crtc_atomic_flush(struct drm_crtc *crtc,
 				      struct drm_crtc_state *old_crtc_state)
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+	struct drm_device *dev = rcrtc->crtc.dev;
+	unsigned long flags;
 
 	rcar_du_crtc_update_planes(rcrtc);
 
+	if (crtc->state->event) {
+		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+
+		spin_lock_irqsave(&dev->event_lock, flags);
+		rcrtc->event = crtc->state->event;
+		crtc->state->event = NULL;
+		spin_unlock_irqrestore(&dev->event_lock, flags);
+	}
+
 	if (rcar_du_has(rcrtc->group->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
 		rcar_du_vsp_atomic_flush(rcrtc);
 }
@@ -650,6 +650,7 @@ static const struct drm_crtc_funcs crtc_funcs = {
 static irqreturn_t rcar_du_crtc_irq(int irq, void *arg)
 {
 	struct rcar_du_crtc *rcrtc = arg;
+	struct rcar_du_device *rcdu = rcrtc->group->dev;
 	irqreturn_t ret = IRQ_NONE;
 	u32 status;
 
@@ -658,7 +659,10 @@ static irqreturn_t rcar_du_crtc_irq(int irq, void *arg)
 
 	if (status & DSSR_FRM) {
 		drm_crtc_handle_vblank(&rcrtc->crtc);
-		rcar_du_crtc_finish_page_flip(rcrtc);
+
+		if (rcdu->info->gen < 3)
+			rcar_du_crtc_finish_page_flip(rcrtc);
+
 		ret = IRQ_HANDLED;
 	}
 
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index 15871fae7445..b199ed5adf36 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -73,5 +73,6 @@ void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
 
 void rcar_du_crtc_route_output(struct drm_crtc *crtc,
 			       enum rcar_du_output output);
+void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc);
 
 #endif /* __RCAR_DU_CRTC_H__ */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index b0ff304ce3dc..f870445ebc8d 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -19,7 +19,9 @@
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_plane_helper.h>
 
+#include <linux/dma-mapping.h>
 #include <linux/of_platform.h>
+#include <linux/scatterlist.h>
 #include <linux/videodev2.h>
 
 #include <media/vsp1.h>
@@ -28,6 +30,13 @@
 #include "rcar_du_kms.h"
 #include "rcar_du_vsp.h"
 
+static void rcar_du_vsp_complete(void *private)
+{
+	struct rcar_du_crtc *crtc = private;
+
+	rcar_du_crtc_finish_page_flip(crtc);
+}
+
 void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
 {
 	const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
@@ -35,6 +44,8 @@ void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
 	struct vsp1_du_lif_config cfg = {
 		.width = mode->hdisplay,
 		.height = mode->vdisplay,
+		.callback = rcar_du_vsp_complete,
+		.callback_data = crtc,
 	};
 	struct rcar_du_plane_state state = {
 		.state = {
@@ -170,12 +181,9 @@ static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
 	cfg.dst.width = state->state.crtc_w;
 	cfg.dst.height = state->state.crtc_h;
 
-	for (i = 0; i < state->format->planes; ++i) {
-		struct drm_gem_cma_object *gem;
-
-		gem = drm_fb_cma_get_gem_obj(fb, i);
-		cfg.mem[i] = gem->paddr + fb->offsets[i];
-	}
+	for (i = 0; i < state->format->planes; ++i)
+		cfg.mem[i] = sg_dma_address(state->sg_tables[i].sgl)
+			   + fb->offsets[i];
 
 	for (i = 0; i < ARRAY_SIZE(formats_kms); ++i) {
 		if (formats_kms[i] == state->format->fourcc) {
@@ -187,6 +195,67 @@ static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
 	vsp1_du_atomic_update(plane->vsp->vsp, plane->index, &cfg);
 }
 
+static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
+					struct drm_plane_state *state)
+{
+	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
+	struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
+	struct rcar_du_device *rcdu = vsp->dev;
+	unsigned int i;
+	int ret;
+
+	if (!state->fb)
+		return 0;
+
+	for (i = 0; i < rstate->format->planes; ++i) {
+		struct drm_gem_cma_object *gem =
+			drm_fb_cma_get_gem_obj(state->fb, i);
+		struct sg_table *sgt = &rstate->sg_tables[i];
+
+		ret = dma_get_sgtable(rcdu->dev, sgt, gem->vaddr, gem->paddr,
+				      gem->base.size);
+		if (ret)
+			goto fail;
+
+		ret = vsp1_du_map_sg(vsp->vsp, sgt);
+		if (!ret) {
+			sg_free_table(sgt);
+			ret = -ENOMEM;
+			goto fail;
+		}
+	}
+
+	return 0;
+
+fail:
+	while (i--) {
+		struct sg_table *sgt = &rstate->sg_tables[i];
+
+		vsp1_du_unmap_sg(vsp->vsp, sgt);
+		sg_free_table(sgt);
+	}
+
+	return ret;
+}
+
+static void rcar_du_vsp_plane_cleanup_fb(struct drm_plane *plane,
+					 struct drm_plane_state *state)
+{
+	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
+	struct rcar_du_vsp *vsp = to_rcar_vsp_plane(plane)->vsp;
+	unsigned int i;
+
+	if (!state->fb)
+		return;
+
+	for (i = 0; i < rstate->format->planes; ++i) {
+		struct sg_table *sgt = &rstate->sg_tables[i];
+
+		vsp1_du_unmap_sg(vsp->vsp, sgt);
+		sg_free_table(sgt);
+	}
+}
+
 static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,
 					  struct drm_plane_state *state)
 {
@@ -227,6 +296,8 @@ static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
 }
 
 static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
+	.prepare_fb = rcar_du_vsp_plane_prepare_fb,
+	.cleanup_fb = rcar_du_vsp_plane_cleanup_fb,
 	.atomic_check = rcar_du_vsp_plane_atomic_check,
 	.atomic_update = rcar_du_vsp_plane_atomic_update,
 };
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.h b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
index f1d0f1824528..8861661590ff 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
@@ -43,6 +43,7 @@ static inline struct rcar_du_vsp_plane *to_rcar_vsp_plane(struct drm_plane *p)
  * struct rcar_du_vsp_plane_state - Driver-specific plane state
  * @state: base DRM plane state
  * @format: information about the pixel format used by the plane
+ * @sg_tables: scatter-gather tables for the frame buffer memory
  * @alpha: value of the plane alpha property
  * @zpos: value of the plane zpos property
  */
@@ -50,6 +51,7 @@ struct rcar_du_vsp_plane_state {
 	struct drm_plane_state state;
 
 	const struct rcar_du_format_info *format;
+	struct sg_table sg_tables[3];
 
 	unsigned int alpha;
 	unsigned int zpos;