Merge tag 'drm-misc-next-2017-06-19_0' of git://anongit.freedesktop.org/git/drm-misc into drm-next

UAPI Changes:
- vc4: Add get/set tiling format ioctls (Eric)

Driver Changes:
- vc4: Add tiling T-format support for scanout (Eric)
- vc4: Use atomic helpers in commit (Boris)

Cc: Boris Brezillon <[email protected]>
Cc: Eric Anholt <[email protected]>

* tag 'drm-misc-next-2017-06-19_0' of git://anongit.freedesktop.org/git/drm-misc:
  drm/vc4: Mimic drm_atomic_helper_commit() behavior
  drm/vc4: Add get/set tiling ioctls.
  drm/vc4: Add T-format scanout support.

Author: airlied

drivers/gpu/drm/vc4/vc4_bo.c

@@ -343,6 +343,7 @@ void vc4_free_object(struct drm_gem_object *gem_bo)
 		bo->validated_shader = NULL;
 	}
 
+	bo->t_format = false;
 	bo->free_time = jiffies;
 	list_add(&bo->size_head, cache_list);
 	list_add(&bo->unref_head, &vc4->bo_cache.time_list);
@@ -568,6 +569,88 @@ vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
 	return ret;
 }
 
+/**
+ * vc4_set_tiling_ioctl() - Sets the tiling modifier for a BO.
+ * @dev: DRM device
+ * @data: ioctl argument
+ * @file_priv: DRM file for this fd
+ *
+ * The tiling state of the BO decides the default modifier of an fb if
+ * no specific modifier was set by userspace, and the return value of
+ * vc4_get_tiling_ioctl() (so that userspace can treat a BO it
+ * received from dmabuf as the same tiling format as the producer
+ * used).
+ */
+int vc4_set_tiling_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv)
+{
+	struct drm_vc4_set_tiling *args = data;
+	struct drm_gem_object *gem_obj;
+	struct vc4_bo *bo;
+	bool t_format;
+
+	if (args->flags != 0)
+		return -EINVAL;
+
+	switch (args->modifier) {
+	case DRM_FORMAT_MOD_NONE:
+		t_format = false;
+		break;
+	case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
+		t_format = true;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	gem_obj = drm_gem_object_lookup(file_priv, args->handle);
+	if (!gem_obj) {
+		DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);
+		return -ENOENT;
+	}
+	bo = to_vc4_bo(gem_obj);
+	bo->t_format = t_format;
+
+	drm_gem_object_unreference_unlocked(gem_obj);
+
+	return 0;
+}
+
+/**
+ * vc4_get_tiling_ioctl() - Gets the tiling modifier for a BO.
+ * @dev: DRM device
+ * @data: ioctl argument
+ * @file_priv: DRM file for this fd
+ *
+ * Returns the tiling modifier for a BO as set by vc4_set_tiling_ioctl().
+ */
+int vc4_get_tiling_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv)
+{
+	struct drm_vc4_get_tiling *args = data;
+	struct drm_gem_object *gem_obj;
+	struct vc4_bo *bo;
+
+	if (args->flags != 0 || args->modifier != 0)
+		return -EINVAL;
+
+	gem_obj = drm_gem_object_lookup(file_priv, args->handle);
+	if (!gem_obj) {
+		DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);
+		return -ENOENT;
+	}
+	bo = to_vc4_bo(gem_obj);
+
+	if (bo->t_format)
+		args->modifier = DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED;
+	else
+		args->modifier = DRM_FORMAT_MOD_NONE;
+
+	drm_gem_object_unreference_unlocked(gem_obj);
+
+	return 0;
+}
+
 void vc4_bo_cache_init(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);

drivers/gpu/drm/vc4/vc4_drv.c

@@ -138,6 +138,8 @@ static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 			  DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
+	DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
+	DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
 };
 
 static struct drm_driver vc4_drm_driver = {

drivers/gpu/drm/vc4/vc4_drv.h

@@ -148,6 +148,8 @@ struct vc4_bo {
 	 */
 	uint64_t write_seqno;
 
+	bool t_format;
+
 	/* List entry for the BO's position in either
 	 * vc4_exec_info->unref_list or vc4_dev->bo_cache.time_list
 	 */
@@ -470,6 +472,10 @@ int vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
 			       struct drm_file *file_priv);
 int vc4_mmap_bo_ioctl(struct drm_device *dev, void *data,
 		      struct drm_file *file_priv);
+int vc4_set_tiling_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv);
+int vc4_get_tiling_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv);
 int vc4_get_hang_state_ioctl(struct drm_device *dev, void *data,
 			     struct drm_file *file_priv);
 int vc4_mmap(struct file *filp, struct vm_area_struct *vma);

drivers/gpu/drm/vc4/vc4_kms.c

@@ -42,6 +42,10 @@ vc4_atomic_complete_commit(struct vc4_commit *c)
 	struct drm_device *dev = state->dev;
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 
+	drm_atomic_helper_wait_for_fences(dev, state, false);
+
+	drm_atomic_helper_wait_for_dependencies(state);
+
 	drm_atomic_helper_commit_modeset_disables(dev, state);
 
 	drm_atomic_helper_commit_planes(dev, state, 0);
@@ -57,10 +61,14 @@ vc4_atomic_complete_commit(struct vc4_commit *c)
 	 */
 	state->legacy_cursor_update = false;
 
+	drm_atomic_helper_commit_hw_done(state);
+
 	drm_atomic_helper_wait_for_vblanks(dev, state);
 
 	drm_atomic_helper_cleanup_planes(dev, state);
 
+	drm_atomic_helper_commit_cleanup_done(state);
+
 	drm_atomic_state_put(state);
 
 	up(&vc4->async_modeset);
@@ -117,32 +125,10 @@ static int vc4_atomic_commit(struct drm_device *dev,
 	if (!c)
 		return -ENOMEM;
 
-	/* Make sure that any outstanding modesets have finished. */
-	if (nonblock) {
-		struct drm_crtc *crtc;
-		struct drm_crtc_state *crtc_state;
-		unsigned long flags;
-		bool busy = false;
-
-		/*
-		 * If there's an undispatched event to send then we're
-		 * obviously still busy.  If there isn't, then we can
-		 * unconditionally wait for the semaphore because it
-		 * shouldn't be contended (for long).
-		 *
-		 * This is to prevent a race where queuing a new flip
-		 * from userspace immediately on receipt of an event
-		 * beats our clean-up and returns EBUSY.
-		 */
-		spin_lock_irqsave(&dev->event_lock, flags);
-		for_each_crtc_in_state(state, crtc, crtc_state, i)
-			busy |= vc4_event_pending(crtc);
-		spin_unlock_irqrestore(&dev->event_lock, flags);
-		if (busy) {
-			kfree(c);
-			return -EBUSY;
-		}
-	}
+	ret = drm_atomic_helper_setup_commit(state, nonblock);
+	if (ret)
+		return ret;
+
 	ret = down_interruptible(&vc4->async_modeset);
 	if (ret) {
 		kfree(c);
@@ -202,11 +188,50 @@ static int vc4_atomic_commit(struct drm_device *dev,
 	return 0;
 }
 
+static struct drm_framebuffer *vc4_fb_create(struct drm_device *dev,
+					     struct drm_file *file_priv,
+					     const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct drm_mode_fb_cmd2 mode_cmd_local;
+
+	/* If the user didn't specify a modifier, use the
+	 * vc4_set_tiling_ioctl() state for the BO.
+	 */
+	if (!(mode_cmd->flags & DRM_MODE_FB_MODIFIERS)) {
+		struct drm_gem_object *gem_obj;
+		struct vc4_bo *bo;
+
+		gem_obj = drm_gem_object_lookup(file_priv,
+						mode_cmd->handles[0]);
+		if (!gem_obj) {
+			DRM_ERROR("Failed to look up GEM BO %d\n",
+				  mode_cmd->handles[0]);
+			return ERR_PTR(-ENOENT);
+		}
+		bo = to_vc4_bo(gem_obj);
+
+		mode_cmd_local = *mode_cmd;
+
+		if (bo->t_format) {
+			mode_cmd_local.modifier[0] =
+				DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED;
+		} else {
+			mode_cmd_local.modifier[0] = DRM_FORMAT_MOD_NONE;
+		}
+
+		drm_gem_object_unreference_unlocked(gem_obj);
+
+		mode_cmd = &mode_cmd_local;
+	}
+
+	return drm_fb_cma_create(dev, file_priv, mode_cmd);
+}
+
 static const struct drm_mode_config_funcs vc4_mode_funcs = {
 	.output_poll_changed = vc4_output_poll_changed,
 	.atomic_check = drm_atomic_helper_check,
 	.atomic_commit = vc4_atomic_commit,
-	.fb_create = drm_fb_cma_create,
+	.fb_create = vc4_fb_create,
 };
 
 int vc4_kms_load(struct drm_device *dev)

drivers/gpu/drm/vc4/vc4_plane.c

@@ -500,8 +500,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
 	u32 ctl0_offset = vc4_state->dlist_count;
 	const struct hvs_format *format = vc4_get_hvs_format(fb->format->format);
 	int num_planes = drm_format_num_planes(format->drm);
-	u32 scl0, scl1;
-	u32 lbm_size;
+	u32 scl0, scl1, pitch0;
+	u32 lbm_size, tiling;
 	unsigned long irqflags;
 	int ret, i;
 
@@ -542,11 +542,31 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
 		scl1 = vc4_get_scl_field(state, 0);
 	}
 
+	switch (fb->modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+		tiling = SCALER_CTL0_TILING_LINEAR;
+		pitch0 = VC4_SET_FIELD(fb->pitches[0], SCALER_SRC_PITCH);
+		break;
+	case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
+		tiling = SCALER_CTL0_TILING_256B_OR_T;
+
+		pitch0 = (VC4_SET_FIELD(0, SCALER_PITCH0_TILE_Y_OFFSET),
+			  VC4_SET_FIELD(0, SCALER_PITCH0_TILE_WIDTH_L),
+			  VC4_SET_FIELD((vc4_state->src_w[0] + 31) >> 5,
+					SCALER_PITCH0_TILE_WIDTH_R));
+		break;
+	default:
+		DRM_DEBUG_KMS("Unsupported FB tiling flag 0x%16llx",
+			      (long long)fb->modifier);
+		return -EINVAL;
+	}
+
 	/* Control word */
 	vc4_dlist_write(vc4_state,
 			SCALER_CTL0_VALID |
 			(format->pixel_order << SCALER_CTL0_ORDER_SHIFT) |
 			(format->hvs << SCALER_CTL0_PIXEL_FORMAT_SHIFT) |
+			VC4_SET_FIELD(tiling, SCALER_CTL0_TILING) |
 			(vc4_state->is_unity ? SCALER_CTL0_UNITY : 0) |
 			VC4_SET_FIELD(scl0, SCALER_CTL0_SCL0) |
 			VC4_SET_FIELD(scl1, SCALER_CTL0_SCL1));
@@ -600,8 +620,11 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
 	for (i = 0; i < num_planes; i++)
 		vc4_dlist_write(vc4_state, 0xc0c0c0c0);
 
-	/* Pitch word 0/1/2 */
-	for (i = 0; i < num_planes; i++) {
+	/* Pitch word 0 */
+	vc4_dlist_write(vc4_state, pitch0);
+
+	/* Pitch word 1/2 */
+	for (i = 1; i < num_planes; i++) {
 		vc4_dlist_write(vc4_state,
 				VC4_SET_FIELD(fb->pitches[i], SCALER_SRC_PITCH));
 	}

drivers/gpu/drm/vc4/vc4_regs.h

@@ -709,6 +709,13 @@ enum hvs_pixel_format {
 #define SCALER_CTL0_SIZE_MASK			VC4_MASK(29, 24)
 #define SCALER_CTL0_SIZE_SHIFT			24
 
+#define SCALER_CTL0_TILING_MASK			VC4_MASK(21, 20)
+#define SCALER_CTL0_TILING_SHIFT		20
+#define SCALER_CTL0_TILING_LINEAR		0
+#define SCALER_CTL0_TILING_64B			1
+#define SCALER_CTL0_TILING_128B			2
+#define SCALER_CTL0_TILING_256B_OR_T		3
+
 #define SCALER_CTL0_HFLIP                       BIT(16)
 #define SCALER_CTL0_VFLIP                       BIT(15)
 
@@ -838,7 +845,19 @@ enum hvs_pixel_format {
 #define SCALER_PPF_KERNEL_OFFSET_SHIFT		0
 #define SCALER_PPF_KERNEL_UNCACHED		BIT(31)
 
+/* PITCH0/1/2 fields for raster. */
 #define SCALER_SRC_PITCH_MASK			VC4_MASK(15, 0)
 #define SCALER_SRC_PITCH_SHIFT			0
 
+/* PITCH0 fields for T-tiled. */
+#define SCALER_PITCH0_TILE_WIDTH_L_MASK		VC4_MASK(22, 16)
+#define SCALER_PITCH0_TILE_WIDTH_L_SHIFT	16
+#define SCALER_PITCH0_TILE_LINE_DIR		BIT(15)
+#define SCALER_PITCH0_TILE_INITIAL_LINE_DIR	BIT(14)
+/* Y offset within a tile. */
+#define SCALER_PITCH0_TILE_Y_OFFSET_MASK	VC4_MASK(13, 7)
+#define SCALER_PITCH0_TILE_Y_OFFSET_SHIFT	7
+#define SCALER_PITCH0_TILE_WIDTH_R_MASK		VC4_MASK(6, 0)
+#define SCALER_PITCH0_TILE_WIDTH_R_SHIFT	0
+
 #endif /* VC4_REGS_H */

include/uapi/drm/drm_fourcc.h

@@ -182,6 +182,7 @@ extern "C" {
 #define DRM_FORMAT_MOD_VENDOR_SAMSUNG 0x04
 #define DRM_FORMAT_MOD_VENDOR_QCOM    0x05
 #define DRM_FORMAT_MOD_VENDOR_VIVANTE 0x06
+#define DRM_FORMAT_MOD_VENDOR_BROADCOM 0x07
 /* add more to the end as needed */
 
 #define fourcc_mod_code(vendor, val) \
@@ -306,7 +307,6 @@ extern "C" {
  */
 #define DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED fourcc_mod_code(VIVANTE, 4)
 
-
 /* NVIDIA Tegra frame buffer modifiers */
 
 /*
@@ -351,6 +351,27 @@ extern "C" {
  */
 #define NV_FORMAT_MOD_TEGRA_16BX2_BLOCK(v) fourcc_mod_tegra_code(2, v)
 
+/*
+ * Broadcom VC4 "T" format
+ *
+ * This is the primary layout that the V3D GPU can texture from (it
+ * can't do linear).  The T format has:
+ *
+ * - 64b utiles of pixels in a raster-order grid according to cpp.  It's 4x4
+ *   pixels at 32 bit depth.
+ *
+ * - 1k subtiles made of a 4x4 raster-order grid of 64b utiles (so usually
+ *   16x16 pixels).
+ *
+ * - 4k tiles made of a 2x2 grid of 1k subtiles (so usually 32x32 pixels).  On
+ *   even 4k tile rows, they're arranged as (BL, TL, TR, BR), and on odd rows
+ *   they're (TR, BR, BL, TL), where bottom left is start of memory.
+ *
+ * - an image made of 4k tiles in rows either left-to-right (even rows of 4k
+ *   tiles) or right-to-left (odd rows of 4k tiles).
+ */
+#define DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED fourcc_mod_code(BROADCOM, 1)
+
 #if defined(__cplusplus)
 }
 #endif