drm/vc4: Bind and initialize the V3D engine.

This is the component of the GPU that does 3D rendering.

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

5 files changed, 242 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vc4/Makefile b/drivers/gpu/drm/vc4/Makefile
index eb776a6a9899..e87a6f2f5916 100644
--- a/drivers/gpu/drm/vc4/Makefile
+++ b/drivers/gpu/drm/vc4/Makefile
@@ -11,6 +11,7 @@ vc4-y := \
         vc4_hdmi.o \
         vc4_hvs.o \
         vc4_plane.o \
+        vc4_v3d.o \
         vc4_validate_shaders.o
 
 vc4-$(CONFIG_DEBUG_FS) += vc4_debugfs.o
diff --git a/drivers/gpu/drm/vc4/vc4_debugfs.c b/drivers/gpu/drm/vc4/vc4_debugfs.c
index 6bcf96e9a482..d76ad10b07fd 100644
--- a/drivers/gpu/drm/vc4/vc4_debugfs.c
+++ b/drivers/gpu/drm/vc4/vc4_debugfs.c
@@ -22,6 +22,8 @@ static const struct drm_info_list vc4_debugfs_list[] = {
         {"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},
 };
 
 #define VC4_DEBUGFS_ENTRIES ARRAY_SIZE(vc4_debugfs_list)
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index da4be9c8f70d..db58d74efe95 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -236,6 +236,7 @@ static struct platform_driver *const component_drivers[] = {
         &vc4_hdmi_driver,
         &vc4_crtc_driver,
         &vc4_hvs_driver,
+        &vc4_v3d_driver,
 };
 
 static int vc4_platform_drm_probe(struct platform_device *pdev)
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index bd77d5574e30..8945463e70b6 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -15,6 +15,7 @@ struct vc4_dev {
         struct vc4_hdmi *hdmi;
         struct vc4_hvs *hvs;
         struct vc4_crtc *crtc[3];
+        struct vc4_v3d *v3d;
 
         struct drm_fbdev_cma *fbdev;
 
@@ -82,6 +83,11 @@ to_vc4_bo(struct drm_gem_object *bo)
         return (struct vc4_bo *)bo;
 }
 
+struct vc4_v3d {
+        struct platform_device *pdev;
+        void __iomem *regs;
+};
+
 struct vc4_hvs {
         struct platform_device *pdev;
         void __iomem *regs;
@@ -119,6 +125,8 @@ to_vc4_encoder(struct drm_encoder *encoder)
         return container_of(encoder, struct vc4_encoder, base);
 }
 
+#define V3D_READ(offset) readl(vc4->v3d->regs + offset)
+#define V3D_WRITE(offset, val) writel(val, vc4->v3d->regs + offset)
 #define HVS_READ(offset) readl(vc4->hvs->regs + offset)
 #define HVS_WRITE(offset, val) writel(val, vc4->hvs->regs + offset)
 
@@ -241,6 +249,11 @@ struct drm_plane *vc4_plane_init(struct drm_device *dev,
 u32 vc4_plane_write_dlist(struct drm_plane *plane, u32 __iomem *dlist);
 u32 vc4_plane_dlist_size(struct drm_plane_state *state);
 
+/* 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);
+
 /* vc4_validate_shader.c */
 struct vc4_validated_shader_info *
 vc4_validate_shader(struct drm_gem_cma_object *shader_obj);
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c
new file mode 100644
index 000000000000..040ad0d8b8a1
--- /dev/null
+++ b/drivers/gpu/drm/vc4/vc4_v3d.c
@@ -0,0 +1,225 @@
+/*
+ * Copyright (c) 2014 The Linux Foundation. All rights reserved.
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "linux/component.h"
+#include "vc4_drv.h"
+#include "vc4_regs.h"
+
+#ifdef CONFIG_DEBUG_FS
+#define REGDEF(reg) { reg, #reg }
+static const struct {
+        uint32_t reg;
+        const char *name;
+} vc4_reg_defs[] = {
+        REGDEF(V3D_IDENT0),
+        REGDEF(V3D_IDENT1),
+        REGDEF(V3D_IDENT2),
+        REGDEF(V3D_SCRATCH),
+        REGDEF(V3D_L2CACTL),
+        REGDEF(V3D_SLCACTL),
+        REGDEF(V3D_INTCTL),
+        REGDEF(V3D_INTENA),
+        REGDEF(V3D_INTDIS),
+        REGDEF(V3D_CT0CS),
+        REGDEF(V3D_CT1CS),
+        REGDEF(V3D_CT0EA),
+        REGDEF(V3D_CT1EA),
+        REGDEF(V3D_CT0CA),
+        REGDEF(V3D_CT1CA),
+        REGDEF(V3D_CT00RA0),
+        REGDEF(V3D_CT01RA0),
+        REGDEF(V3D_CT0LC),
+        REGDEF(V3D_CT1LC),
+        REGDEF(V3D_CT0PC),
+        REGDEF(V3D_CT1PC),
+        REGDEF(V3D_PCS),
+        REGDEF(V3D_BFC),
+        REGDEF(V3D_RFC),
+        REGDEF(V3D_BPCA),
+        REGDEF(V3D_BPCS),
+        REGDEF(V3D_BPOA),
+        REGDEF(V3D_BPOS),
+        REGDEF(V3D_BXCF),
+        REGDEF(V3D_SQRSV0),
+        REGDEF(V3D_SQRSV1),
+        REGDEF(V3D_SQCNTL),
+        REGDEF(V3D_SRQPC),
+        REGDEF(V3D_SRQUA),
+        REGDEF(V3D_SRQUL),
+        REGDEF(V3D_SRQCS),
+        REGDEF(V3D_VPACNTL),
+        REGDEF(V3D_VPMBASE),
+        REGDEF(V3D_PCTRC),
+        REGDEF(V3D_PCTRE),
+        REGDEF(V3D_PCTR0),
+        REGDEF(V3D_PCTRS0),
+        REGDEF(V3D_PCTR1),
+        REGDEF(V3D_PCTRS1),
+        REGDEF(V3D_PCTR2),
+        REGDEF(V3D_PCTRS2),
+        REGDEF(V3D_PCTR3),
+        REGDEF(V3D_PCTRS3),
+        REGDEF(V3D_PCTR4),
+        REGDEF(V3D_PCTRS4),
+        REGDEF(V3D_PCTR5),
+        REGDEF(V3D_PCTRS5),
+        REGDEF(V3D_PCTR6),
+        REGDEF(V3D_PCTRS6),
+        REGDEF(V3D_PCTR7),
+        REGDEF(V3D_PCTRS7),
+        REGDEF(V3D_PCTR8),
+        REGDEF(V3D_PCTRS8),
+        REGDEF(V3D_PCTR9),
+        REGDEF(V3D_PCTRS9),
+        REGDEF(V3D_PCTR10),
+        REGDEF(V3D_PCTRS10),
+        REGDEF(V3D_PCTR11),
+        REGDEF(V3D_PCTRS11),
+        REGDEF(V3D_PCTR12),
+        REGDEF(V3D_PCTRS12),
+        REGDEF(V3D_PCTR13),
+        REGDEF(V3D_PCTRS13),
+        REGDEF(V3D_PCTR14),
+        REGDEF(V3D_PCTRS14),
+        REGDEF(V3D_PCTR15),
+        REGDEF(V3D_PCTRS15),
+        REGDEF(V3D_DBGE),
+        REGDEF(V3D_FDBGO),
+        REGDEF(V3D_FDBGB),
+        REGDEF(V3D_FDBGR),
+        REGDEF(V3D_FDBGS),
+        REGDEF(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);
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(vc4_reg_defs); i++) {
+                seq_printf(m, "%s (0x%04x): 0x%08x\n",
+                           vc4_reg_defs[i].name, vc4_reg_defs[i].reg,
+                           V3D_READ(vc4_reg_defs[i].reg));
+        }
+
+        return 0;
+}
+
+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;
+        struct vc4_dev *vc4 = to_vc4_dev(dev);
+        uint32_t ident1 = V3D_READ(V3D_IDENT1);
+        uint32_t nslc = VC4_GET_FIELD(ident1, V3D_IDENT1_NSLC);
+        uint32_t tups = VC4_GET_FIELD(ident1, V3D_IDENT1_TUPS);
+        uint32_t qups = VC4_GET_FIELD(ident1, V3D_IDENT1_QUPS);
+
+        seq_printf(m, "Revision:   %d\n",
+                   VC4_GET_FIELD(ident1, V3D_IDENT1_REV));
+        seq_printf(m, "Slices:     %d\n", nslc);
+        seq_printf(m, "TMUs:       %d\n", nslc * tups);
+        seq_printf(m, "QPUs:       %d\n", nslc * qups);
+        seq_printf(m, "Semaphores: %d\n",
+                   VC4_GET_FIELD(ident1, V3D_IDENT1_NSEM));
+
+        return 0;
+}
+#endif /* CONFIG_DEBUG_FS */
+
+static void vc4_v3d_init_hw(struct drm_device *dev)
+{
+        struct vc4_dev *vc4 = to_vc4_dev(dev);
+
+        /* Take all the memory that would have been reserved for user
+         * QPU programs, since we don't have an interface for running
+         * them, anyway.
+         */
+        V3D_WRITE(V3D_VPMBASE, 0);
+}
+
+static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct drm_device *drm = dev_get_drvdata(master);
+        struct vc4_dev *vc4 = to_vc4_dev(drm);
+        struct vc4_v3d *v3d = NULL;
+
+        v3d = devm_kzalloc(&pdev->dev, sizeof(*v3d), GFP_KERNEL);
+        if (!v3d)
+                return -ENOMEM;
+
+        v3d->pdev = pdev;
+
+        v3d->regs = vc4_ioremap_regs(pdev, 0);
+        if (IS_ERR(v3d->regs))
+                return PTR_ERR(v3d->regs);
+
+        vc4->v3d = v3d;
+
+        if (V3D_READ(V3D_IDENT0) != V3D_EXPECTED_IDENT0) {
+                DRM_ERROR("V3D_IDENT0 read 0x%08x instead of 0x%08x\n",
+                          V3D_READ(V3D_IDENT0), V3D_EXPECTED_IDENT0);
+                return -EINVAL;
+        }
+
+        vc4_v3d_init_hw(drm);
+
+        return 0;
+}
+
+static void vc4_v3d_unbind(struct device *dev, struct device *master,
+                           void *data)
+{
+        struct drm_device *drm = dev_get_drvdata(master);
+        struct vc4_dev *vc4 = to_vc4_dev(drm);
+
+        vc4->v3d = NULL;
+}
+
+static const struct component_ops vc4_v3d_ops = {
+        .bind   = vc4_v3d_bind,
+        .unbind = vc4_v3d_unbind,
+};
+
+static int vc4_v3d_dev_probe(struct platform_device *pdev)
+{
+        return component_add(&pdev->dev, &vc4_v3d_ops);
+}
+
+static int vc4_v3d_dev_remove(struct platform_device *pdev)
+{
+        component_del(&pdev->dev, &vc4_v3d_ops);
+        return 0;
+}
+
+static const struct of_device_id vc4_v3d_dt_match[] = {
+        { .compatible = "brcm,vc4-v3d" },
+        {}
+};
+
+struct platform_driver vc4_v3d_driver = {
+        .probe = vc4_v3d_dev_probe,
+        .remove = vc4_v3d_dev_remove,
+        .driver = {
+                .name = "vc4_v3d",
+                .of_match_table = vc4_v3d_dt_match,
+        },
+};