drm/vc4: Add support for drawing 3D frames.

The user submission is basically a pointer to a command list and a
pointer to uniforms.  We copy those in to the kernel, validate and
relocate them, and store the result in a GPU BO which we queue for
execution.

v2: Drop support for NV shader recs (not necessary for GL), simplify
    vc4_use_bo(), improve bin flush/semaphore checks, use __u32 style
    types.

Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c
index 040ad0d8b8a1..424d515ffcda 100644
--- a/drivers/gpu/drm/vc4/vc4_v3d.c
+++ b/drivers/gpu/drm/vc4/vc4_v3d.c
@@ -144,6 +144,21 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
 }
 #endif /* CONFIG_DEBUG_FS */
 
+/*
+ * Asks the firmware to turn on power to the V3D engine.
+ *
+ * This may be doable with just the clocks interface, though this
+ * packet does some other register setup from the firmware, too.
+ */
+int
+vc4_v3d_set_power(struct vc4_dev *vc4, bool on)
+{
+	if (on)
+		return pm_generic_poweroff(&vc4->v3d->pdev->dev);
+	else
+		return pm_generic_resume(&vc4->v3d->pdev->dev);
+}
+
 static void vc4_v3d_init_hw(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
@@ -161,6 +176,7 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
 	struct drm_device *drm = dev_get_drvdata(master);
 	struct vc4_dev *vc4 = to_vc4_dev(drm);
 	struct vc4_v3d *v3d = NULL;
+	int ret;
 
 	v3d = devm_kzalloc(&pdev->dev, sizeof(*v3d), GFP_KERNEL);
 	if (!v3d)
@@ -180,8 +196,20 @@ static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
 		return -EINVAL;
 	}
 
+	/* Reset the binner overflow address/size at setup, to be sure
+	 * we don't reuse an old one.
+	 */
+	V3D_WRITE(V3D_BPOA, 0);
+	V3D_WRITE(V3D_BPOS, 0);
+
 	vc4_v3d_init_hw(drm);
 
+	ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
+	if (ret) {
+		DRM_ERROR("Failed to install IRQ handler\n");
+		return ret;
+	}
+
 	return 0;
 }
 
@@ -191,6 +219,15 @@ static void vc4_v3d_unbind(struct device *dev, struct device *master,
 	struct drm_device *drm = dev_get_drvdata(master);
 	struct vc4_dev *vc4 = to_vc4_dev(drm);
 
+	drm_irq_uninstall(drm);
+
+	/* Disable the binner's overflow memory address, so the next
+	 * driver probe (if any) doesn't try to reuse our old
+	 * allocation.
+	 */
+	V3D_WRITE(V3D_BPOA, 0);
+	V3D_WRITE(V3D_BPOS, 0);
+
 	vc4->v3d = NULL;
 }