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Subject[PATCHv4 8/8] gpu: host1x: Register DRM dummy device
Date
Register a dummy device for tegradrm, and provide a getter to
access the device.

Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
---
drivers/gpu/drm/tegra/dc.c | 5 ++++-
drivers/gpu/drm/tegra/drm.c | 11 +--------
drivers/gpu/drm/tegra/gr2d.c | 4 +++-
drivers/gpu/drm/tegra/hdmi.c | 5 ++++-
drivers/gpu/host1x/Makefile | 3 ++-
drivers/gpu/host1x/dev.c | 9 ++++++++
drivers/gpu/host1x/dev.h | 2 ++
drivers/gpu/host1x/drm.c | 51 ++++++++++++++++++++++++++++++++++++++++++
drivers/gpu/host1x/drm.h | 25 +++++++++++++++++++++
include/linux/host1x.h | 2 ++
10 files changed, 103 insertions(+), 14 deletions(-)
create mode 100644 drivers/gpu/host1x/drm.c
create mode 100644 drivers/gpu/host1x/drm.h

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 24bcd06..d01be50 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/host1x.h>

#include <mach/clk.h>

@@ -740,7 +741,9 @@ static int tegra_dc_probe(struct platform_device *pdev)
struct resource *regs;
struct tegra_dc *dc;
int err;
- struct tegradrm *tegradrm = platform_get_drvdata(pdev);
+ struct platform_device *drm_device =
+ host1x_drm_device(to_platform_device(pdev->dev.parent));
+ struct tegradrm *tegradrm = platform_get_drvdata(drm_device);

dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL);
if (!dc)
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 637b621..d64935d 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -56,7 +56,6 @@ static int tegra_drm_add_client(struct device *dev, void *data)
client->np = of_node_get(dev->of_node);

list_add_tail(&client->list, &tegradrm->drm_clients);
- dev_set_drvdata(dev, tegradrm);
}
}

@@ -258,16 +257,10 @@ static struct platform_driver tegra_drm_platform_driver = {
static int __init tegra_drm_init(void)
{
int err;
- struct platform_device *drm_device;
-
- drm_device = platform_device_register_simple("tegradrm", -1, NULL, 0);
- if (!drm_device)
- return -ENOMEM;
- dma_set_coherent_mask(&drm_device->dev, DMA_BIT_MASK(32));

err = platform_driver_register(&tegra_drm_platform_driver);
if (err < 0)
- goto unregister_tegra_dev;
+ return err;

err = platform_driver_register(&tegra_dc_driver);
if (err < 0)
@@ -288,8 +281,6 @@ unregister_dc:
platform_driver_unregister(&tegra_dc_driver);
unregister_tegra_drv:
platform_driver_unregister(&tegra_drm_platform_driver);
-unregister_tegra_dev:
- platform_device_unregister(drm_device);
return err;
}
module_init(tegra_drm_init);
diff --git a/drivers/gpu/drm/tegra/gr2d.c b/drivers/gpu/drm/tegra/gr2d.c
index 8865099..a936902 100644
--- a/drivers/gpu/drm/tegra/gr2d.c
+++ b/drivers/gpu/drm/tegra/gr2d.c
@@ -247,7 +247,9 @@ static int __devinit gr2d_probe(struct platform_device *dev)
{
int err;
struct gr2d *gr2d = NULL;
- struct tegradrm *tegradrm = platform_get_drvdata(dev);
+ struct platform_device *drm_device =
+ host1x_drm_device(to_platform_device(dev->dev.parent));
+ struct tegradrm *tegradrm = platform_get_drvdata(drm_device);

gr2d = devm_kzalloc(&dev->dev, sizeof(*gr2d), GFP_KERNEL);
if (!gr2d)
diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c
index fce3e66..a90a76f 100644
--- a/drivers/gpu/drm/tegra/hdmi.c
+++ b/drivers/gpu/drm/tegra/hdmi.c
@@ -14,6 +14,7 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
+#include <linux/host1x.h>

#include <mach/clk.h>

@@ -1214,7 +1215,9 @@ static int tegra_hdmi_probe(struct platform_device *pdev)
struct tegra_hdmi *hdmi;
struct resource *regs;
int err;
- struct tegradrm *tegradrm = platform_get_drvdata(pdev);
+ struct platform_device *drm_device =
+ host1x_drm_device(to_platform_device(pdev->dev.parent));
+ struct tegradrm *tegradrm = platform_get_drvdata(drm_device);

hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
if (!hdmi)
diff --git a/drivers/gpu/host1x/Makefile b/drivers/gpu/host1x/Makefile
index 049c07a..f8749fb 100644
--- a/drivers/gpu/host1x/Makefile
+++ b/drivers/gpu/host1x/Makefile
@@ -10,7 +10,8 @@ host1x-y = \
job.o \
debug.o \
memmgr.o \
- hw/host1x01.o
+ hw/host1x01.o \
+ drm.o

host1x-$(CONFIG_TEGRA_HOST1X_CMA) += cma.o
obj-$(CONFIG_TEGRA_HOST1X) += host1x.o
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index 8d710ef..07e8813 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -25,6 +25,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include "dev.h"
+#include "drm.h"
#include "intr.h"
#include "channel.h"
#include "debug.h"
@@ -145,6 +146,12 @@ static int host1x_probe(struct platform_device *dev)

/* set common host1x device data */
platform_set_drvdata(dev, host);
+
+ /* Alloc DRM device */
+ err = host1x_register_drm_device(host);
+ if (err)
+ goto fail;
+
host->regs = devm_request_and_ioremap(&dev->dev, regs);
if (!host->regs) {
dev_err(&dev->dev, "failed to remap host registers\n");
@@ -203,6 +210,7 @@ static int host1x_probe(struct platform_device *dev)

fail:
host1x_syncpt_free(host->nop_sp);
+ host1x_unregister_drm_device(host);
kfree(host);
return err;
}
@@ -212,6 +220,7 @@ static int __exit host1x_remove(struct platform_device *dev)
struct host1x *host = platform_get_drvdata(dev);
host1x_intr_deinit(&host->intr);
host1x_syncpt_deinit(host);
+ host1x_unregister_drm_device(host);
clk_disable_unprepare(host->clk);
return 0;
}
diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h
index aa5182e..05f8544 100644
--- a/drivers/gpu/host1x/dev.h
+++ b/drivers/gpu/host1x/dev.h
@@ -143,6 +143,8 @@ struct host1x {
int allocated_channels;

struct dentry *debugfs;
+
+ struct platform_device *drm_device;
};

static inline
diff --git a/drivers/gpu/host1x/drm.c b/drivers/gpu/host1x/drm.c
new file mode 100644
index 0000000..eaaaeed
--- /dev/null
+++ b/drivers/gpu/host1x/drm.c
@@ -0,0 +1,51 @@
+/*
+ * Tegra host1x driver DRM dummy device
+ *
+ * Copyright (c) 2012, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include "drm.h"
+#include "dev.h"
+
+int host1x_register_drm_device(struct host1x *host1x)
+{
+ struct platform_device *drm_device;
+
+ drm_device = platform_device_register_simple("tegradrm", -1, NULL, 0);
+ if (!drm_device)
+ return -ENOMEM;
+ dma_set_coherent_mask(&drm_device->dev, DMA_BIT_MASK(32));
+
+ host1x->drm_device = drm_device;
+ return 0;
+}
+EXPORT_SYMBOL(host1x_register_drm_device);
+
+void host1x_unregister_drm_device(struct host1x *host1x)
+{
+ if (host1x->drm_device)
+ platform_device_unregister(host1x->drm_device);
+}
+EXPORT_SYMBOL(host1x_unregister_drm_device);
+
+struct platform_device *host1x_drm_device(struct platform_device *pdev)
+{
+ struct host1x *host = platform_get_drvdata(pdev);
+ return host->drm_device;
+}
+EXPORT_SYMBOL(host1x_drm_device);
diff --git a/drivers/gpu/host1x/drm.h b/drivers/gpu/host1x/drm.h
new file mode 100644
index 0000000..84a827e
--- /dev/null
+++ b/drivers/gpu/host1x/drm.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2012, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/>.
+ */
+
+#ifndef HOST1X_DRM_H
+#define HOST1X_DRM_H
+
+struct host1x;
+
+int host1x_register_drm_device(struct host1x *host1x);
+void host1x_unregister_drm_device(struct host1x *host1x);
+
+#endif
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index a58c798..0906c19f 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -212,4 +212,6 @@ struct host1x_syncpt *host1x_syncpt_alloc(struct platform_device *pdev,
int client_managed);
void host1x_syncpt_free(struct host1x_syncpt *sp);

+struct platform_device *host1x_drm_device(struct platform_device *pdev);
+
#endif
--
1.7.9.5


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