From bd7de1e8d96c1469c0de292c3e03803c956fc58e Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Sat, 2 Feb 2019 09:41:58 -0600
Subject: drm: vc4: Switch to use drm_gem_object reservation_object

Now that the base struct drm_gem_object has a reservation_object, use it
and remove the private BO one.

Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190202154158.10443-6-robh@kernel.org
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
 drivers/gpu/drm/vc4/vc4_drv.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers/gpu/drm/vc4/vc4_drv.c')

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 5fcd2f0da7f7..52576dee809e 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -200,7 +200,6 @@ static struct drm_driver vc4_drm_driver = {
 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 	.gem_prime_import = drm_gem_prime_import,
 	.gem_prime_export = vc4_prime_export,
-	.gem_prime_res_obj = vc4_prime_res_obj,
 	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
 	.gem_prime_import_sg_table = vc4_prime_import_sg_table,
 	.gem_prime_vmap = vc4_prime_vmap,
-- 
cgit v1.2.3


From 4686da83154d87be6e754ddc68e4ac89b0027ea9 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@bootlin.com>
Date: Wed, 20 Feb 2019 16:51:23 +0100
Subject: drm/vc4: Add a load tracker to prevent HVS underflow errors

The HVS block is supposed to fill the pixelvalve FIFOs fast enough to
meet the requested framerate. The problem is, the HVS and memory bus
bandwidths are limited, and if we don't take these limitations into
account we might end up with HVS underflow errors.

This patch is trying to model the per-plane HVS and memory bus bandwidth
consumption and take a decision at atomic_check() time whether the
estimated load will fit in the HVS and membus budget.

Note that we take an extra margin on the memory bus consumption to let
the system run smoothly when other blocks are doing heavy use of the
memory bus. Same goes for the HVS limit, except the margin is smaller in
this case, since the HVS is not used by external components.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190220155124.25022-3-paul.kocialkowski@bootlin.com
---
 drivers/gpu/drm/vc4/vc4_drv.c   |   1 +
 drivers/gpu/drm/vc4/vc4_drv.h   |  11 +++++
 drivers/gpu/drm/vc4/vc4_kms.c   | 103 +++++++++++++++++++++++++++++++++++++++-
 drivers/gpu/drm/vc4/vc4_plane.c |  57 ++++++++++++++++++++++
 4 files changed, 171 insertions(+), 1 deletion(-)

(limited to 'drivers/gpu/drm/vc4/vc4_drv.c')

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 52576dee809e..3227706700f9 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -311,6 +311,7 @@ static void vc4_drm_unbind(struct device *dev)
 
 	drm_mode_config_cleanup(drm);
 
+	drm_atomic_private_obj_fini(&vc4->load_tracker);
 	drm_atomic_private_obj_fini(&vc4->ctm_manager);
 
 	drm_dev_put(drm);
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 6f86af1b3212..bbab084911f3 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -207,6 +207,7 @@ struct vc4_dev {
 
 	struct drm_modeset_lock ctm_state_lock;
 	struct drm_private_obj ctm_manager;
+	struct drm_private_obj load_tracker;
 };
 
 static inline struct vc4_dev *
@@ -378,6 +379,16 @@ struct vc4_plane_state {
 	 * when async update is not possible.
 	 */
 	bool dlist_initialized;
+
+	/* Load of this plane on the HVS block. The load is expressed in HVS
+	 * cycles/sec.
+	 */
+	u64 hvs_load;
+
+	/* Memory bandwidth needed for this plane. This is expressed in
+	 * bytes/sec.
+	 */
+	u64 membus_load;
 };
 
 static inline struct vc4_plane_state *
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index b971258dcfd4..6e20604573de 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -34,6 +34,18 @@ static struct vc4_ctm_state *to_vc4_ctm_state(struct drm_private_state *priv)
 	return container_of(priv, struct vc4_ctm_state, base);
 }
 
+struct vc4_load_tracker_state {
+	struct drm_private_state base;
+	u64 hvs_load;
+	u64 membus_load;
+};
+
+static struct vc4_load_tracker_state *
+to_vc4_load_tracker_state(struct drm_private_state *priv)
+{
+	return container_of(priv, struct vc4_load_tracker_state, base);
+}
+
 static struct vc4_ctm_state *vc4_get_ctm_state(struct drm_atomic_state *state,
 					       struct drm_private_obj *manager)
 {
@@ -395,6 +407,81 @@ vc4_ctm_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
 	return 0;
 }
 
+static int vc4_load_tracker_atomic_check(struct drm_atomic_state *state)
+{
+	struct drm_plane_state *old_plane_state, *new_plane_state;
+	struct vc4_dev *vc4 = to_vc4_dev(state->dev);
+	struct vc4_load_tracker_state *load_state;
+	struct drm_private_state *priv_state;
+	struct drm_plane *plane;
+	int i;
+
+	priv_state = drm_atomic_get_private_obj_state(state,
+						      &vc4->load_tracker);
+	if (IS_ERR(priv_state))
+		return PTR_ERR(priv_state);
+
+	load_state = to_vc4_load_tracker_state(priv_state);
+	for_each_oldnew_plane_in_state(state, plane, old_plane_state,
+				       new_plane_state, i) {
+		struct vc4_plane_state *vc4_plane_state;
+
+		if (old_plane_state->fb && old_plane_state->crtc) {
+			vc4_plane_state = to_vc4_plane_state(old_plane_state);
+			load_state->membus_load -= vc4_plane_state->membus_load;
+			load_state->hvs_load -= vc4_plane_state->hvs_load;
+		}
+
+		if (new_plane_state->fb && new_plane_state->crtc) {
+			vc4_plane_state = to_vc4_plane_state(new_plane_state);
+			load_state->membus_load += vc4_plane_state->membus_load;
+			load_state->hvs_load += vc4_plane_state->hvs_load;
+		}
+	}
+
+	/* The absolute limit is 2Gbyte/sec, but let's take a margin to let
+	 * the system work when other blocks are accessing the memory.
+	 */
+	if (load_state->membus_load > SZ_1G + SZ_512M)
+		return -ENOSPC;
+
+	/* HVS clock is supposed to run @ 250Mhz, let's take a margin and
+	 * consider the maximum number of cycles is 240M.
+	 */
+	if (load_state->hvs_load > 240000000ULL)
+		return -ENOSPC;
+
+	return 0;
+}
+
+static struct drm_private_state *
+vc4_load_tracker_duplicate_state(struct drm_private_obj *obj)
+{
+	struct vc4_load_tracker_state *state;
+
+	state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return NULL;
+
+	__drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
+
+	return &state->base;
+}
+
+static void vc4_load_tracker_destroy_state(struct drm_private_obj *obj,
+					   struct drm_private_state *state)
+{
+	struct vc4_load_tracker_state *load_state;
+
+	load_state = to_vc4_load_tracker_state(state);
+	kfree(load_state);
+}
+
+static const struct drm_private_state_funcs vc4_load_tracker_state_funcs = {
+	.atomic_duplicate_state = vc4_load_tracker_duplicate_state,
+	.atomic_destroy_state = vc4_load_tracker_destroy_state,
+};
+
 static int
 vc4_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
 {
@@ -404,7 +491,11 @@ vc4_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
 	if (ret < 0)
 		return ret;
 
-	return drm_atomic_helper_check(dev, state);
+	ret = drm_atomic_helper_check(dev, state);
+	if (ret)
+		return ret;
+
+	return vc4_load_tracker_atomic_check(state);
 }
 
 static const struct drm_mode_config_funcs vc4_mode_funcs = {
@@ -417,6 +508,7 @@ int vc4_kms_load(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_ctm_state *ctm_state;
+	struct vc4_load_tracker_state *load_state;
 	int ret;
 
 	sema_init(&vc4->async_modeset, 1);
@@ -446,6 +538,15 @@ int vc4_kms_load(struct drm_device *dev)
 	drm_atomic_private_obj_init(dev, &vc4->ctm_manager, &ctm_state->base,
 				    &vc4_ctm_state_funcs);
 
+	load_state = kzalloc(sizeof(*load_state), GFP_KERNEL);
+	if (!load_state) {
+		drm_atomic_private_obj_fini(&vc4->ctm_manager);
+		return -ENOMEM;
+	}
+
+	drm_atomic_private_obj_init(dev, &vc4->load_tracker, &load_state->base,
+				    &vc4_load_tracker_state_funcs);
+
 	drm_mode_config_reset(dev);
 
 	drm_kms_helper_poll_init(dev);
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 1babfeca0c92..4d918d3e4858 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -488,6 +488,61 @@ static void vc4_write_scaling_parameters(struct drm_plane_state *state,
 	}
 }
 
+static void vc4_plane_calc_load(struct drm_plane_state *state)
+{
+	unsigned int hvs_load_shift, vrefresh, i;
+	struct drm_framebuffer *fb = state->fb;
+	struct vc4_plane_state *vc4_state;
+	struct drm_crtc_state *crtc_state;
+	unsigned int vscale_factor;
+
+	vc4_state = to_vc4_plane_state(state);
+	crtc_state = drm_atomic_get_existing_crtc_state(state->state,
+							state->crtc);
+	vrefresh = drm_mode_vrefresh(&crtc_state->adjusted_mode);
+
+	/* The HVS is able to process 2 pixels/cycle when scaling the source,
+	 * 4 pixels/cycle otherwise.
+	 * Alpha blending step seems to be pipelined and it's always operating
+	 * at 4 pixels/cycle, so the limiting aspect here seems to be the
+	 * scaler block.
+	 * HVS load is expressed in clk-cycles/sec (AKA Hz).
+	 */
+	if (vc4_state->x_scaling[0] != VC4_SCALING_NONE ||
+	    vc4_state->x_scaling[1] != VC4_SCALING_NONE ||
+	    vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
+	    vc4_state->y_scaling[1] != VC4_SCALING_NONE)
+		hvs_load_shift = 1;
+	else
+		hvs_load_shift = 2;
+
+	vc4_state->membus_load = 0;
+	vc4_state->hvs_load = 0;
+	for (i = 0; i < fb->format->num_planes; i++) {
+		/* Even if the bandwidth/plane required for a single frame is
+		 *
+		 * vc4_state->src_w[i] * vc4_state->src_h[i] * cpp * vrefresh
+		 *
+		 * when downscaling, we have to read more pixels per line in
+		 * the time frame reserved for a single line, so the bandwidth
+		 * demand can be punctually higher. To account for that, we
+		 * calculate the down-scaling factor and multiply the plane
+		 * load by this number. We're likely over-estimating the read
+		 * demand, but that's better than under-estimating it.
+		 */
+		vscale_factor = DIV_ROUND_UP(vc4_state->src_h[i],
+					     vc4_state->crtc_h);
+		vc4_state->membus_load += vc4_state->src_w[i] *
+					  vc4_state->src_h[i] * vscale_factor *
+					  fb->format->cpp[i];
+		vc4_state->hvs_load += vc4_state->crtc_h * vc4_state->crtc_w;
+	}
+
+	vc4_state->hvs_load *= vrefresh;
+	vc4_state->hvs_load >>= hvs_load_shift;
+	vc4_state->membus_load *= vrefresh;
+}
+
 static int vc4_plane_allocate_lbm(struct drm_plane_state *state)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(state->plane->dev);
@@ -875,6 +930,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
 	 */
 	vc4_state->dlist_initialized = 1;
 
+	vc4_plane_calc_load(state);
+
 	return 0;
 }
 
-- 
cgit v1.2.3


From f741b28fb299263d2d03a0fb701bfe648927cd47 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime.ripard@bootlin.com>
Date: Wed, 6 Mar 2019 15:02:45 +0100
Subject: drm/vc4: Use 16bpp by default for the fbdev buffer

The preferred bpp for the fbdev emulation buffer has been 32 so far, which
means that by default we will allocate an 8MB buffer with a 1920x1080
resolution.

Worse this memory will be allocated from the CMA pool, and will never be
freed even if we don't use the fbdev emulation. Therefore, reducing it is a
big deal, and switching to 16bpp by default will gain us around 4MB at
1920x1080, while keeping decent color depth. And users still have the
option to switch to 32bpp using the kernel command line.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190306140245.21973-1-maxime.ripard@bootlin.com
---
 drivers/gpu/drm/vc4/vc4_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/gpu/drm/vc4/vc4_drv.c')

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 3227706700f9..4daf44fd4548 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -286,7 +286,7 @@ static int vc4_drm_bind(struct device *dev)
 
 	vc4_kms_load(drm);
 
-	drm_fbdev_generic_setup(drm, 32);
+	drm_fbdev_generic_setup(drm, 16);
 
 	return 0;
 
-- 
cgit v1.2.3


From cb74f6ee8e3a00e85d53697d5d84ec21d416e5ef Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 20 Feb 2019 13:03:42 -0800
Subject: drm/vc4: Add helpers for pm get/put.

This makes sure the vc4_reset doesn't hit an obscure race with the
GET_PARAM ioctl, fixes a decrement outside of the lock, and prevents
future code from making mistakes with the weird return value of
pm_runtime_get_sync().

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190220210343.28157-6-eric@anholt.net
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 drivers/gpu/drm/vc4/vc4_drv.c | 21 +++++++++------------
 drivers/gpu/drm/vc4/vc4_drv.h |  2 ++
 drivers/gpu/drm/vc4/vc4_gem.c | 21 +++++----------------
 drivers/gpu/drm/vc4/vc4_v3d.c | 33 +++++++++++++++++++++++++++++++++
 4 files changed, 49 insertions(+), 28 deletions(-)

(limited to 'drivers/gpu/drm/vc4/vc4_drv.c')

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 4daf44fd4548..f2d0fb3aa729 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -74,28 +74,25 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
 
 	switch (args->param) {
 	case DRM_VC4_PARAM_V3D_IDENT0:
-		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
-		if (ret < 0)
+		ret = vc4_v3d_pm_get(vc4);
+		if (ret)
 			return ret;
 		args->value = V3D_READ(V3D_IDENT0);
-		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
-		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
+		vc4_v3d_pm_put(vc4);
 		break;
 	case DRM_VC4_PARAM_V3D_IDENT1:
-		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
-		if (ret < 0)
+		ret = vc4_v3d_pm_get(vc4);
+		if (ret)
 			return ret;
 		args->value = V3D_READ(V3D_IDENT1);
-		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
-		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
+		vc4_v3d_pm_put(vc4);
 		break;
 	case DRM_VC4_PARAM_V3D_IDENT2:
-		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
-		if (ret < 0)
+		ret = vc4_v3d_pm_get(vc4);
+		if (ret)
 			return ret;
 		args->value = V3D_READ(V3D_IDENT2);
-		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
-		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
+		vc4_v3d_pm_put(vc4);
 		break;
 	case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
 	case DRM_VC4_PARAM_SUPPORTS_ETC1:
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 5156ede0f7b7..f6c9de75d465 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -815,6 +815,8 @@ extern struct platform_driver vc4_v3d_driver;
 int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused);
 int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused);
 int vc4_v3d_get_bin_slot(struct vc4_dev *vc4);
+int vc4_v3d_pm_get(struct vc4_dev *vc4);
+void vc4_v3d_pm_put(struct vc4_dev *vc4);
 
 /* vc4_validate.c */
 int
diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
index 5ee5bf7fedf7..5e9496d477bf 100644
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -964,12 +964,7 @@ vc4_complete_exec(struct drm_device *dev, struct vc4_exec_info *exec)
 	/* Release the reference we had on the perf monitor. */
 	vc4_perfmon_put(exec->perfmon);
 
-	mutex_lock(&vc4->power_lock);
-	if (--vc4->power_refcount == 0) {
-		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
-		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
-	}
-	mutex_unlock(&vc4->power_lock);
+	vc4_v3d_pm_put(vc4);
 
 	kfree(exec);
 }
@@ -1143,17 +1138,11 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
 		return -ENOMEM;
 	}
 
-	mutex_lock(&vc4->power_lock);
-	if (vc4->power_refcount++ == 0) {
-		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
-		if (ret < 0) {
-			mutex_unlock(&vc4->power_lock);
-			vc4->power_refcount--;
-			kfree(exec);
-			return ret;
-		}
+	ret = vc4_v3d_pm_get(vc4);
+	if (ret) {
+		kfree(exec);
+		return ret;
 	}
-	mutex_unlock(&vc4->power_lock);
 
 	exec->args = args;
 	INIT_LIST_HEAD(&exec->unref_list);
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c
index e1e728e95562..b2b974f20e23 100644
--- a/drivers/gpu/drm/vc4/vc4_v3d.c
+++ b/drivers/gpu/drm/vc4/vc4_v3d.c
@@ -138,6 +138,39 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
 }
 #endif /* CONFIG_DEBUG_FS */
 
+/**
+ * Wraps pm_runtime_get_sync() in a refcount, so that we can reliably
+ * get the pm_runtime refcount to 0 in vc4_reset().
+ */
+int
+vc4_v3d_pm_get(struct vc4_dev *vc4)
+{
+	mutex_lock(&vc4->power_lock);
+	if (vc4->power_refcount++ == 0) {
+		int ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
+
+		if (ret < 0) {
+			vc4->power_refcount--;
+			mutex_unlock(&vc4->power_lock);
+			return ret;
+		}
+	}
+	mutex_unlock(&vc4->power_lock);
+
+	return 0;
+}
+
+void
+vc4_v3d_pm_put(struct vc4_dev *vc4)
+{
+	mutex_lock(&vc4->power_lock);
+	if (--vc4->power_refcount == 0) {
+		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
+		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
+	}
+	mutex_unlock(&vc4->power_lock);
+}
+
 static void vc4_v3d_init_hw(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
-- 
cgit v1.2.3


From d7f9b83913f12b918906b8c1f4a4b90b5f4347d3 Mon Sep 17 00:00:00 2001
From: Noralf Trønnes <noralf@tronnes.org>
Date: Tue, 26 Mar 2019 18:55:46 +0100
Subject: drm/vc4: Call drm_dev_register() after all setup is done
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

drm_dev_register() initializes internal clients like bootsplash as the
last thing it does, so all setup needs to be done at this point.

Fix by calling vc4_kms_load() before registering.
Also check the error code returned from that function.

Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190326175546.18126-17-noralf@tronnes.org
---
 drivers/gpu/drm/vc4/vc4_drv.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'drivers/gpu/drm/vc4/vc4_drv.c')

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index f2d0fb3aa729..8d56eb23c9b5 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -277,11 +277,13 @@ static int vc4_drm_bind(struct device *dev)
 
 	drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
 
-	ret = drm_dev_register(drm, 0);
+	ret = vc4_kms_load(drm);
 	if (ret < 0)
 		goto unbind_all;
 
-	vc4_kms_load(drm);
+	ret = drm_dev_register(drm, 0);
+	if (ret < 0)
+		goto unbind_all;
 
 	drm_fbdev_generic_setup(drm, 16);
 
-- 
cgit v1.2.3


From c9be804c8c7a2d3fcd8e236407c8623be0356a01 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 1 Apr 2019 11:35:58 -0700
Subject: drm/vc4: Use common helpers for debugfs setup by the driver
 components.

The global list of all debugfs entries for the driver was painful: the
list couldn't see into the components' structs, so each component had
its own debugs show function to find the component, then find the
regset and dump it.  The components also had to be careful to check
that they were actually registered in vc4 before dereferencing
themselves, in case they weren't probed on a particular platform.
They routinely failed at that.

Instead, we can have the components add their debugfs callbacks to a
little list in vc4 to be registered at drm_dev_register() time, which
gets vc4_debugfs.c out of the business of knowing the whole list of
components.

Thanks to this change, dsi0 (if it existed) would register its node.

v2: Rebase on hvs_underrun addition.
v3: whitespace fixup

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190401183559.3823-1-eric@anholt.net
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 drivers/gpu/drm/vc4/vc4_bo.c      |  6 +--
 drivers/gpu/drm/vc4/vc4_crtc.c    | 33 +++-------------
 drivers/gpu/drm/vc4/vc4_debugfs.c | 82 ++++++++++++++++++++++++++++++---------
 drivers/gpu/drm/vc4/vc4_dpi.c     | 20 +---------
 drivers/gpu/drm/vc4/vc4_drv.c     |  1 +
 drivers/gpu/drm/vc4/vc4_drv.h     | 39 +++++++++++++------
 drivers/gpu/drm/vc4/vc4_dsi.c     | 24 +++---------
 drivers/gpu/drm/vc4/vc4_hdmi.c    |  6 +--
 drivers/gpu/drm/vc4/vc4_hvs.c     | 20 +++-------
 drivers/gpu/drm/vc4/vc4_txp.c     | 20 +---------
 drivers/gpu/drm/vc4/vc4_v3d.c     | 19 ++-------
 drivers/gpu/drm/vc4/vc4_vec.c     | 20 +---------
 12 files changed, 125 insertions(+), 165 deletions(-)

(limited to 'drivers/gpu/drm/vc4/vc4_drv.c')

diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c
index 276ea9c550c0..88ebd681d7eb 100644
--- a/drivers/gpu/drm/vc4/vc4_bo.c
+++ b/drivers/gpu/drm/vc4/vc4_bo.c
@@ -66,8 +66,7 @@ static void vc4_bo_stats_print(struct drm_printer *p, struct vc4_dev *vc4)
 	mutex_unlock(&vc4->purgeable.lock);
 }
 
-#ifdef CONFIG_DEBUG_FS
-int vc4_bo_stats_debugfs(struct seq_file *m, void *unused)
+static int vc4_bo_stats_debugfs(struct seq_file *m, void *unused)
 {
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
 	struct drm_device *dev = node->minor->dev;
@@ -78,7 +77,6 @@ int vc4_bo_stats_debugfs(struct seq_file *m, void *unused)
 
 	return 0;
 }
-#endif
 
 /* Takes ownership of *name and returns the appropriate slot for it in
  * the bo_labels[] array, extending it as necessary.
@@ -1005,6 +1003,8 @@ int vc4_bo_cache_init(struct drm_device *dev)
 
 	mutex_init(&vc4->bo_lock);
 
+	vc4_debugfs_add_file(dev, "bo_stats", vc4_bo_stats_debugfs, NULL);
+
 	INIT_LIST_HEAD(&vc4->bo_cache.time_list);
 
 	INIT_WORK(&vc4->bo_cache.time_work, vc4_bo_cache_time_work);
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index 6e564783ba94..b2891ca0e7f4 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -84,33 +84,6 @@ static const struct debugfs_reg32 crtc_regs[] = {
 	VC4_REG32(PV_HACT_ACT),
 };
 
-#ifdef CONFIG_DEBUG_FS
-int vc4_crtc_debugfs_regs(struct seq_file *m, void *unused)
-{
-	struct drm_info_node *node = (struct drm_info_node *)m->private;
-	struct drm_device *dev = node->minor->dev;
-	int crtc_index = (uintptr_t)node->info_ent->data;
-	struct drm_printer p = drm_seq_file_printer(m);
-	struct drm_crtc *crtc;
-	struct vc4_crtc *vc4_crtc;
-	int i;
-
-	i = 0;
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		if (i == crtc_index)
-			break;
-		i++;
-	}
-	if (!crtc)
-		return 0;
-	vc4_crtc = to_vc4_crtc(crtc);
-
-	drm_print_regset32(&p, &vc4_crtc->regset);
-
-	return 0;
-}
-#endif
-
 bool vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id,
 			     bool in_vblank_irq, int *vpos, int *hpos,
 			     ktime_t *stime, ktime_t *etime,
@@ -1070,6 +1043,7 @@ static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
 
 static const struct vc4_crtc_data pv0_data = {
 	.hvs_channel = 0,
+	.debugfs_name = "crtc0_regs",
 	.encoder_types = {
 		[PV_CONTROL_CLK_SELECT_DSI] = VC4_ENCODER_TYPE_DSI0,
 		[PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_DPI,
@@ -1078,6 +1052,7 @@ static const struct vc4_crtc_data pv0_data = {
 
 static const struct vc4_crtc_data pv1_data = {
 	.hvs_channel = 2,
+	.debugfs_name = "crtc1_regs",
 	.encoder_types = {
 		[PV_CONTROL_CLK_SELECT_DSI] = VC4_ENCODER_TYPE_DSI1,
 		[PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_SMI,
@@ -1086,6 +1061,7 @@ static const struct vc4_crtc_data pv1_data = {
 
 static const struct vc4_crtc_data pv2_data = {
 	.hvs_channel = 1,
+	.debugfs_name = "crtc2_regs",
 	.encoder_types = {
 		[PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_HDMI,
 		[PV_CONTROL_CLK_SELECT_VEC] = VC4_ENCODER_TYPE_VEC,
@@ -1247,6 +1223,9 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
 
 	platform_set_drvdata(pdev, vc4_crtc);
 
+	vc4_debugfs_add_regset32(drm, vc4_crtc->data->debugfs_name,
+				 &vc4_crtc->regset);
+
 	return 0;
 
 err_destroy_planes:
diff --git a/drivers/gpu/drm/vc4/vc4_debugfs.c b/drivers/gpu/drm/vc4/vc4_debugfs.c
index 59cdad89f844..69df84bdf904 100644
--- a/drivers/gpu/drm/vc4/vc4_debugfs.c
+++ b/drivers/gpu/drm/vc4/vc4_debugfs.c
@@ -15,28 +15,20 @@
 #include "vc4_drv.h"
 #include "vc4_regs.h"
 
-static const struct drm_info_list vc4_debugfs_list[] = {
-	{"bo_stats", vc4_bo_stats_debugfs, 0},
-	{"dpi_regs", vc4_dpi_debugfs_regs, 0},
-	{"dsi1_regs", vc4_dsi_debugfs_regs, 0, (void *)(uintptr_t)1},
-	{"hdmi_regs", vc4_hdmi_debugfs_regs, 0},
-	{"vec_regs", vc4_vec_debugfs_regs, 0},
-	{"txp_regs", vc4_txp_debugfs_regs, 0},
-	{"hvs_regs", vc4_hvs_debugfs_regs, 0},
-	{"hvs_underrun",  vc4_hvs_debugfs_underrun, 0},
-	{"crtc0_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)0},
-	{"crtc1_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)1},
-	{"crtc2_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)2},
-	{"v3d_ident", vc4_v3d_debugfs_ident, 0},
-	{"v3d_regs", vc4_v3d_debugfs_regs, 0},
+struct vc4_debugfs_info_entry {
+	struct list_head link;
+	struct drm_info_list info;
 };
 
-#define VC4_DEBUGFS_ENTRIES ARRAY_SIZE(vc4_debugfs_list)
-
+/**
+ * Called at drm_dev_register() time on each of the minors registered
+ * by the DRM device, to attach the debugfs files.
+ */
 int
 vc4_debugfs_init(struct drm_minor *minor)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(minor->dev);
+	struct vc4_debugfs_info_entry *entry;
 	struct dentry *dentry;
 
 	dentry = debugfs_create_bool("hvs_load_tracker", S_IRUGO | S_IWUSR,
@@ -45,6 +37,60 @@ vc4_debugfs_init(struct drm_minor *minor)
 	if (!dentry)
 		return -ENOMEM;
 
-	return drm_debugfs_create_files(vc4_debugfs_list, VC4_DEBUGFS_ENTRIES,
-					minor->debugfs_root, minor);
+	list_for_each_entry(entry, &vc4->debugfs_list, link) {
+		int ret = drm_debugfs_create_files(&entry->info, 1,
+						   minor->debugfs_root, minor);
+
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+int vc4_debugfs_regset32(struct seq_file *m, void *unused)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct debugfs_regset32 *regset = node->info_ent->data;
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	drm_print_regset32(&p, regset);
+
+	return 0;
+}
+
+/**
+ * Registers a debugfs file with a callback function for a vc4 component.
+ *
+ * This is like drm_debugfs_create_files(), but that can only be
+ * called a given DRM minor, while the various VC4 components want to
+ * register their debugfs files during the component bind process.  We
+ * track the request and delay it to be called on each minor during
+ * vc4_debugfs_init().
+ */
+void vc4_debugfs_add_file(struct drm_device *dev,
+			  const char *name,
+			  int (*show)(struct seq_file*, void*),
+			  void *data)
+{
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
+
+	struct vc4_debugfs_info_entry *entry =
+		devm_kzalloc(dev->dev, sizeof(*entry), GFP_KERNEL);
+
+	if (!entry)
+		return;
+
+	entry->info.name = name;
+	entry->info.show = show;
+	entry->info.data = data;
+
+	list_add(&entry->link, &vc4->debugfs_list);
+}
+
+void vc4_debugfs_add_regset32(struct drm_device *drm,
+			      const char *name,
+			      struct debugfs_regset32 *regset)
+{
+	vc4_debugfs_add_file(drm, name, vc4_debugfs_regset32, regset);
 }
diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c
index 8be2264f496a..34f90ca8f479 100644
--- a/drivers/gpu/drm/vc4/vc4_dpi.c
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
@@ -125,24 +125,6 @@ static const struct debugfs_reg32 dpi_regs[] = {
 	VC4_REG32(DPI_ID),
 };
 
-#ifdef CONFIG_DEBUG_FS
-int vc4_dpi_debugfs_regs(struct seq_file *m, void *unused)
-{
-	struct drm_info_node *node = (struct drm_info_node *)m->private;
-	struct drm_device *dev = node->minor->dev;
-	struct vc4_dev *vc4 = to_vc4_dev(dev);
-	struct vc4_dpi *dpi = vc4->dpi;
-	struct drm_printer p = drm_seq_file_printer(m);
-
-	if (!dpi)
-		return 0;
-
-	drm_print_regset32(&p, &dpi->regset);
-
-	return 0;
-}
-#endif
-
 static const struct drm_encoder_funcs vc4_dpi_encoder_funcs = {
 	.destroy = drm_encoder_cleanup,
 };
@@ -349,6 +331,8 @@ static int vc4_dpi_bind(struct device *dev, struct device *master, void *data)
 
 	vc4->dpi = dpi;
 
+	vc4_debugfs_add_regset32(drm, "dpi_regs", &dpi->regset);
+
 	return 0;
 
 err_destroy_encoder:
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 8d56eb23c9b5..41403e48bb18 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -262,6 +262,7 @@ static int vc4_drm_bind(struct device *dev)
 	platform_set_drvdata(pdev, drm);
 	vc4->dev = drm;
 	drm->dev_private = vc4;
+	INIT_LIST_HEAD(&vc4->debugfs_list);
 
 	ret = vc4_bo_cache_init(drm);
 	if (ret)
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index f6c9de75d465..e7b97d7e5ddf 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -211,6 +211,11 @@ struct vc4_dev {
 	struct drm_modeset_lock ctm_state_lock;
 	struct drm_private_obj ctm_manager;
 	struct drm_private_obj load_tracker;
+
+	/* List of vc4_debugfs_info_entry for adding to debugfs once
+	 * the minor is available (after drm_dev_register()).
+	 */
+	struct list_head debugfs_list;
 };
 
 static inline struct vc4_dev *
@@ -429,6 +434,7 @@ struct vc4_crtc_data {
 	int hvs_channel;
 
 	enum vc4_encoder_type encoder_types[4];
+	const char *debugfs_name;
 };
 
 struct vc4_crtc {
@@ -715,7 +721,6 @@ struct drm_gem_object *vc4_prime_import_sg_table(struct drm_device *dev,
 void *vc4_prime_vmap(struct drm_gem_object *obj);
 int vc4_bo_cache_init(struct drm_device *dev);
 void vc4_bo_cache_destroy(struct drm_device *dev);
-int vc4_bo_stats_debugfs(struct seq_file *m, void *arg);
 int vc4_bo_inc_usecnt(struct vc4_bo *bo);
 void vc4_bo_dec_usecnt(struct vc4_bo *bo);
 void vc4_bo_add_to_purgeable_pool(struct vc4_bo *bo);
@@ -723,7 +728,6 @@ void vc4_bo_remove_from_purgeable_pool(struct vc4_bo *bo);
 
 /* vc4_crtc.c */
 extern struct platform_driver vc4_crtc_driver;
-int vc4_crtc_debugfs_regs(struct seq_file *m, void *arg);
 bool vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id,
 			     bool in_vblank_irq, int *vpos, int *hpos,
 			     ktime_t *stime, ktime_t *etime,
@@ -736,17 +740,37 @@ void vc4_crtc_get_margins(struct drm_crtc_state *state,
 
 /* vc4_debugfs.c */
 int vc4_debugfs_init(struct drm_minor *minor);
+#ifdef CONFIG_DEBUG_FS
+void vc4_debugfs_add_file(struct drm_device *drm,
+			  const char *filename,
+			  int (*show)(struct seq_file*, void*),
+			  void *data);
+void vc4_debugfs_add_regset32(struct drm_device *drm,
+			      const char *filename,
+			      struct debugfs_regset32 *regset);
+#else
+static inline void vc4_debugfs_add_file(struct drm_device *drm,
+					const char *filename,
+					int (*show)(struct seq_file*, void*),
+					void *data)
+{
+}
+
+static inline void vc4_debugfs_add_regset32(struct drm_device *drm,
+					    const char *filename,
+					    struct debugfs_regset32 *regset)
+{
+}
+#endif
 
 /* vc4_drv.c */
 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index);
 
 /* vc4_dpi.c */
 extern struct platform_driver vc4_dpi_driver;
-int vc4_dpi_debugfs_regs(struct seq_file *m, void *unused);
 
 /* vc4_dsi.c */
 extern struct platform_driver vc4_dsi_driver;
-int vc4_dsi_debugfs_regs(struct seq_file *m, void *unused);
 
 /* vc4_fence.c */
 extern const struct dma_fence_ops vc4_fence_ops;
@@ -774,15 +798,12 @@ int vc4_gem_madvise_ioctl(struct drm_device *dev, void *data,
 
 /* vc4_hdmi.c */
 extern struct platform_driver vc4_hdmi_driver;
-int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused);
 
 /* vc4_vec.c */
 extern struct platform_driver vc4_vec_driver;
-int vc4_vec_debugfs_regs(struct seq_file *m, void *unused);
 
 /* vc4_txp.c */
 extern struct platform_driver vc4_txp_driver;
-int vc4_txp_debugfs_regs(struct seq_file *m, void *unused);
 
 /* vc4_irq.c */
 irqreturn_t vc4_irq(int irq, void *arg);
@@ -794,8 +815,6 @@ void vc4_irq_reset(struct drm_device *dev);
 /* vc4_hvs.c */
 extern struct platform_driver vc4_hvs_driver;
 void vc4_hvs_dump_state(struct drm_device *dev);
-int vc4_hvs_debugfs_regs(struct seq_file *m, void *unused);
-int vc4_hvs_debugfs_underrun(struct seq_file *m, void *unused);
 void vc4_hvs_unmask_underrun(struct drm_device *dev, int channel);
 void vc4_hvs_mask_underrun(struct drm_device *dev, int channel);
 
@@ -812,8 +831,6 @@ void vc4_plane_async_set_fb(struct drm_plane *plane,
 
 /* vc4_v3d.c */
 extern struct platform_driver vc4_v3d_driver;
-int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused);
-int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused);
 int vc4_v3d_get_bin_slot(struct vc4_dev *vc4);
 int vc4_v3d_pm_get(struct vc4_dev *vc4);
 void vc4_v3d_pm_put(struct vc4_dev *vc4);
diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index 806cfaa2a6a7..9412709067f5 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -657,25 +657,6 @@ static const struct debugfs_reg32 dsi1_regs[] = {
 	VC4_REG32(DSI1_ID),
 };
 
-#ifdef CONFIG_DEBUG_FS
-int vc4_dsi_debugfs_regs(struct seq_file *m, void *unused)
-{
-	struct drm_info_node *node = (struct drm_info_node *)m->private;
-	struct drm_device *drm = node->minor->dev;
-	struct vc4_dev *vc4 = to_vc4_dev(drm);
-	int dsi_index = (uintptr_t)node->info_ent->data;
-	struct vc4_dsi *dsi = (dsi_index == 1 ? vc4->dsi1 : NULL);
-	struct drm_printer p = drm_seq_file_printer(m);
-
-	if (!dsi)
-		return 0;
-
-	drm_print_regset32(&p, &dsi->regset);
-
-	return 0;
-}
-#endif
-
 static void vc4_dsi_encoder_destroy(struct drm_encoder *encoder)
 {
 	drm_encoder_cleanup(encoder);
@@ -1637,6 +1618,11 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
 	 */
 	dsi->encoder->bridge = NULL;
 
+	if (dsi->port == 0)
+		vc4_debugfs_add_regset32(drm, "dsi0_regs", &dsi->regset);
+	else
+		vc4_debugfs_add_regset32(drm, "dsi1_regs", &dsi->regset);
+
 	pm_runtime_enable(dev);
 
 	return 0;
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 38c9172cfe52..99fc8569e0f5 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -187,8 +187,7 @@ static const struct debugfs_reg32 hd_regs[] = {
 	VC4_REG32(VC4_HD_FRAME_COUNT),
 };
 
-#ifdef CONFIG_DEBUG_FS
-int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
+static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
 {
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
 	struct drm_device *dev = node->minor->dev;
@@ -201,7 +200,6 @@ int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
 
 	return 0;
 }
-#endif /* CONFIG_DEBUG_FS */
 
 static enum drm_connector_status
 vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
@@ -1432,6 +1430,8 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 	if (ret)
 		goto err_destroy_encoder;
 
+	vc4_debugfs_add_file(drm, "hdmi_regs", vc4_hdmi_debugfs_regs, hdmi);
+
 	return 0;
 
 #ifdef CONFIG_DRM_VC4_HDMI_CEC
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
index c463453f941b..f746e9a7a88c 100644
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -80,20 +80,7 @@ void vc4_hvs_dump_state(struct drm_device *dev)
 	}
 }
 
-#ifdef CONFIG_DEBUG_FS
-int vc4_hvs_debugfs_regs(struct seq_file *m, void *unused)
-{
-	struct drm_info_node *node = (struct drm_info_node *)m->private;
-	struct drm_device *dev = node->minor->dev;
-	struct vc4_dev *vc4 = to_vc4_dev(dev);
-	struct drm_printer p = drm_seq_file_printer(m);
-
-	drm_print_regset32(&p, &vc4->hvs->regset);
-
-	return 0;
-}
-
-int vc4_hvs_debugfs_underrun(struct seq_file *m, void *data)
+static int vc4_hvs_debugfs_underrun(struct seq_file *m, void *data)
 {
 	struct drm_info_node *node = m->private;
 	struct drm_device *dev = node->minor->dev;
@@ -104,7 +91,6 @@ int vc4_hvs_debugfs_underrun(struct seq_file *m, void *data)
 
 	return 0;
 }
-#endif
 
 /* The filter kernel is composed of dwords each containing 3 9-bit
  * signed integers packed next to each other.
@@ -316,6 +302,10 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data)
 	if (ret)
 		return ret;
 
+	vc4_debugfs_add_regset32(drm, "hvs_regs", &hvs->regset);
+	vc4_debugfs_add_file(drm, "hvs_underrun", vc4_hvs_debugfs_underrun,
+			     NULL);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/vc4/vc4_txp.c b/drivers/gpu/drm/vc4/vc4_txp.c
index c8f80064c179..1220f4a5aac4 100644
--- a/drivers/gpu/drm/vc4/vc4_txp.c
+++ b/drivers/gpu/drm/vc4/vc4_txp.c
@@ -169,24 +169,6 @@ static const struct debugfs_reg32 txp_regs[] = {
 	VC4_REG32(TXP_PROGRESS),
 };
 
-#ifdef CONFIG_DEBUG_FS
-int vc4_txp_debugfs_regs(struct seq_file *m, void *unused)
-{
-	struct drm_info_node *node = (struct drm_info_node *)m->private;
-	struct drm_device *dev = node->minor->dev;
-	struct vc4_dev *vc4 = to_vc4_dev(dev);
-	struct vc4_txp *txp = vc4->txp;
-	struct drm_printer p = drm_seq_file_printer(m);
-
-	if (!txp)
-		return 0;
-
-	drm_print_regset32(&p, &txp->regset);
-
-	return 0;
-}
-#endif
-
 static int vc4_txp_connector_get_modes(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
@@ -424,6 +406,8 @@ static int vc4_txp_bind(struct device *dev, struct device *master, void *data)
 	dev_set_drvdata(dev, txp);
 	vc4->txp = txp;
 
+	vc4_debugfs_add_regset32(drm, "txp_regs", &txp->regset);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c
index 27c70eb52405..36e6c7086ecf 100644
--- a/drivers/gpu/drm/vc4/vc4_v3d.c
+++ b/drivers/gpu/drm/vc4/vc4_v3d.c
@@ -22,7 +22,6 @@
 #include "vc4_drv.h"
 #include "vc4_regs.h"
 
-#ifdef CONFIG_DEBUG_FS
 static const struct debugfs_reg32 v3d_regs[] = {
 	VC4_REG32(V3D_IDENT0),
 	VC4_REG32(V3D_IDENT1),
@@ -104,19 +103,7 @@ static const struct debugfs_reg32 v3d_regs[] = {
 	VC4_REG32(V3D_ERRSTAT),
 };
 
-int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused)
-{
-	struct drm_info_node *node = (struct drm_info_node *)m->private;
-	struct drm_device *dev = node->minor->dev;
-	struct vc4_dev *vc4 = to_vc4_dev(dev);
-	struct drm_printer p = drm_seq_file_printer(m);
-
-	drm_print_regset32(&p, &vc4->v3d->regset);
-
-	return 0;
-}
-
-int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
+static int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
 {
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
 	struct drm_device *dev = node->minor->dev;
@@ -141,7 +128,6 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
 
 	return 0;
 }
-#endif /* CONFIG_DEBUG_FS */
 
 /**
  * Wraps pm_runtime_get_sync() in a refcount, so that we can reliably
@@ -442,6 +428,9 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
 	pm_runtime_set_autosuspend_delay(dev, 40); /* a little over 2 frames. */
 	pm_runtime_enable(dev);
 
+	vc4_debugfs_add_file(drm, "v3d_ident", vc4_v3d_debugfs_ident, NULL);
+	vc4_debugfs_add_regset32(drm, "v3d_regs", &v3d->regset);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/vc4/vc4_vec.c b/drivers/gpu/drm/vc4/vc4_vec.c
index 83227d2440aa..0a27e48fab31 100644
--- a/drivers/gpu/drm/vc4/vc4_vec.c
+++ b/drivers/gpu/drm/vc4/vc4_vec.c
@@ -252,24 +252,6 @@ static const struct debugfs_reg32 vec_regs[] = {
 	VC4_REG32(VEC_DAC_MISC),
 };
 
-#ifdef CONFIG_DEBUG_FS
-int vc4_vec_debugfs_regs(struct seq_file *m, void *unused)
-{
-	struct drm_info_node *node = (struct drm_info_node *)m->private;
-	struct drm_device *dev = node->minor->dev;
-	struct vc4_dev *vc4 = to_vc4_dev(dev);
-	struct vc4_vec *vec = vc4->vec;
-	struct drm_printer p = drm_seq_file_printer(m);
-
-	if (!vec)
-		return 0;
-
-	drm_print_regset32(&p, &vec->regset);
-
-	return 0;
-}
-#endif
-
 static void vc4_vec_ntsc_mode_set(struct vc4_vec *vec)
 {
 	VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN);
@@ -609,6 +591,8 @@ static int vc4_vec_bind(struct device *dev, struct device *master, void *data)
 
 	vc4->vec = vec;
 
+	vc4_debugfs_add_regset32(drm, "vec_regs", &vec->regset);
+
 	return 0;
 
 err_destroy_encoder:
-- 
cgit v1.2.3


From ffc26740714962e3e8801dca7ef32b636b3781db Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 1 Apr 2019 11:35:59 -0700
Subject: drm/vc4: Disable V3D interactions if the v3d component didn't probe.

One might want to use the VC4 display stack without using Mesa.
Similar to the debugfs fixes for not having all of the possible
display bits enabled, make sure you can't oops in vc4 if v3d isn't
enabled.

v2: Fix matching against other v3d variants (review by Paul), don't
    forget to set irq_enabled so that the vblank uapi works
v3: Use -ENODEV instead of -EINVAL on Paul's suggestion.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190401183559.3823-2-eric@anholt.net
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 drivers/gpu/drm/vc4/vc4_drv.c     | 10 ++++++++++
 drivers/gpu/drm/vc4/vc4_drv.h     |  1 +
 drivers/gpu/drm/vc4/vc4_gem.c     | 10 ++++++++++
 drivers/gpu/drm/vc4/vc4_irq.c     |  9 +++++++++
 drivers/gpu/drm/vc4/vc4_kms.c     |  1 +
 drivers/gpu/drm/vc4/vc4_perfmon.c | 18 ++++++++++++++++++
 drivers/gpu/drm/vc4/vc4_v3d.c     |  2 +-
 7 files changed, 50 insertions(+), 1 deletion(-)

(limited to 'drivers/gpu/drm/vc4/vc4_drv.c')

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 41403e48bb18..6d9be20a32be 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -72,6 +72,9 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
 	if (args->pad != 0)
 		return -EINVAL;
 
+	if (!vc4->v3d)
+		return -ENODEV;
+
 	switch (args->param) {
 	case DRM_VC4_PARAM_V3D_IDENT0:
 		ret = vc4_v3d_pm_get(vc4);
@@ -248,6 +251,7 @@ static int vc4_drm_bind(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct drm_device *drm;
 	struct vc4_dev *vc4;
+	struct device_node *node;
 	int ret = 0;
 
 	dev->coherent_dma_mask = DMA_BIT_MASK(32);
@@ -256,6 +260,12 @@ static int vc4_drm_bind(struct device *dev)
 	if (!vc4)
 		return -ENOMEM;
 
+	/* If VC4 V3D is missing, don't advertise render nodes. */
+	node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
+	if (!node || !of_device_is_available(node))
+		vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
+	of_node_put(node);
+
 	drm = drm_dev_alloc(&vc4_drm_driver, dev);
 	if (IS_ERR(drm))
 		return PTR_ERR(drm);
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index e7b97d7e5ddf..4f13f6262491 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -831,6 +831,7 @@ void vc4_plane_async_set_fb(struct drm_plane *plane,
 
 /* vc4_v3d.c */
 extern struct platform_driver vc4_v3d_driver;
+extern const struct of_device_id vc4_v3d_dt_match[];
 int vc4_v3d_get_bin_slot(struct vc4_dev *vc4);
 int vc4_v3d_pm_get(struct vc4_dev *vc4);
 void vc4_v3d_pm_put(struct vc4_dev *vc4);
diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
index 5e9496d477bf..d9311be32a4f 100644
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -74,6 +74,11 @@ vc4_get_hang_state_ioctl(struct drm_device *dev, void *data,
 	u32 i;
 	int ret = 0;
 
+	if (!vc4->v3d) {
+		DRM_DEBUG("VC4_GET_HANG_STATE with no VC4 V3D probed\n");
+		return -ENODEV;
+	}
+
 	spin_lock_irqsave(&vc4->job_lock, irqflags);
 	kernel_state = vc4->hang_state;
 	if (!kernel_state) {
@@ -1119,6 +1124,11 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
 	struct dma_fence *in_fence;
 	int ret = 0;
 
+	if (!vc4->v3d) {
+		DRM_DEBUG("VC4_SUBMIT_CL with no VC4 V3D probed\n");
+		return -ENODEV;
+	}
+
 	if ((args->flags & ~(VC4_SUBMIT_CL_USE_CLEAR_COLOR |
 			     VC4_SUBMIT_CL_FIXED_RCL_ORDER |
 			     VC4_SUBMIT_CL_RCL_ORDER_INCREASING_X |
diff --git a/drivers/gpu/drm/vc4/vc4_irq.c b/drivers/gpu/drm/vc4/vc4_irq.c
index 4cd2ccfe15f4..ffd0a4388752 100644
--- a/drivers/gpu/drm/vc4/vc4_irq.c
+++ b/drivers/gpu/drm/vc4/vc4_irq.c
@@ -229,6 +229,9 @@ vc4_irq_preinstall(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 
+	if (!vc4->v3d)
+		return;
+
 	init_waitqueue_head(&vc4->job_wait_queue);
 	INIT_WORK(&vc4->overflow_mem_work, vc4_overflow_mem_work);
 
@@ -243,6 +246,9 @@ vc4_irq_postinstall(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 
+	if (!vc4->v3d)
+		return 0;
+
 	/* Enable both the render done and out of memory interrupts. */
 	V3D_WRITE(V3D_INTENA, V3D_DRIVER_IRQS);
 
@@ -254,6 +260,9 @@ vc4_irq_uninstall(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 
+	if (!vc4->v3d)
+		return;
+
 	/* Disable sending interrupts for our driver's IRQs. */
 	V3D_WRITE(V3D_INTDIS, V3D_DRIVER_IRQS);
 
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 5160cad25fce..295dacc8bcb9 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -525,6 +525,7 @@ int vc4_kms_load(struct drm_device *dev)
 	/* Set support for vblank irq fast disable, before drm_vblank_init() */
 	dev->vblank_disable_immediate = true;
 
+	dev->irq_enabled = true;
 	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 	if (ret < 0) {
 		dev_err(dev->dev, "failed to initialize vblank\n");
diff --git a/drivers/gpu/drm/vc4/vc4_perfmon.c b/drivers/gpu/drm/vc4/vc4_perfmon.c
index 495150415020..f4aa75efd16b 100644
--- a/drivers/gpu/drm/vc4/vc4_perfmon.c
+++ b/drivers/gpu/drm/vc4/vc4_perfmon.c
@@ -100,12 +100,18 @@ void vc4_perfmon_close_file(struct vc4_file *vc4file)
 int vc4_perfmon_create_ioctl(struct drm_device *dev, void *data,
 			     struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_file *vc4file = file_priv->driver_priv;
 	struct drm_vc4_perfmon_create *req = data;
 	struct vc4_perfmon *perfmon;
 	unsigned int i;
 	int ret;
 
+	if (!vc4->v3d) {
+		DRM_DEBUG("Creating perfmon no VC4 V3D probed\n");
+		return -ENODEV;
+	}
+
 	/* Number of monitored counters cannot exceed HW limits. */
 	if (req->ncounters > DRM_VC4_MAX_PERF_COUNTERS ||
 	    !req->ncounters)
@@ -146,10 +152,16 @@ int vc4_perfmon_create_ioctl(struct drm_device *dev, void *data,
 int vc4_perfmon_destroy_ioctl(struct drm_device *dev, void *data,
 			      struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_file *vc4file = file_priv->driver_priv;
 	struct drm_vc4_perfmon_destroy *req = data;
 	struct vc4_perfmon *perfmon;
 
+	if (!vc4->v3d) {
+		DRM_DEBUG("Destroying perfmon no VC4 V3D probed\n");
+		return -ENODEV;
+	}
+
 	mutex_lock(&vc4file->perfmon.lock);
 	perfmon = idr_remove(&vc4file->perfmon.idr, req->id);
 	mutex_unlock(&vc4file->perfmon.lock);
@@ -164,11 +176,17 @@ int vc4_perfmon_destroy_ioctl(struct drm_device *dev, void *data,
 int vc4_perfmon_get_values_ioctl(struct drm_device *dev, void *data,
 				 struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_file *vc4file = file_priv->driver_priv;
 	struct drm_vc4_perfmon_get_values *req = data;
 	struct vc4_perfmon *perfmon;
 	int ret;
 
+	if (!vc4->v3d) {
+		DRM_DEBUG("Getting perfmon no VC4 V3D probed\n");
+		return -ENODEV;
+	}
+
 	mutex_lock(&vc4file->perfmon.lock);
 	perfmon = idr_find(&vc4file->perfmon.idr, req->id);
 	vc4_perfmon_get(perfmon);
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c
index 36e6c7086ecf..a4b6859e3af6 100644
--- a/drivers/gpu/drm/vc4/vc4_v3d.c
+++ b/drivers/gpu/drm/vc4/vc4_v3d.c
@@ -474,7 +474,7 @@ static int vc4_v3d_dev_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id vc4_v3d_dt_match[] = {
+const struct of_device_id vc4_v3d_dt_match[] = {
 	{ .compatible = "brcm,bcm2835-v3d" },
 	{ .compatible = "brcm,cygnus-v3d" },
 	{ .compatible = "brcm,vc4-v3d" },
-- 
cgit v1.2.3