[PATCH v3 03/29] media: iris: add platform driver for iris video device

Dikshita Agarwal via B4 Relay
2024-08-27T10:06:34Z

From: Dikshita Agarwal <quic_dikshita@quicinc.com>

In preparation of adding H264 decode functionality,
add probe and remove functions to iris video platform driver.

Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
---
drivers/media/platform/qcom/Kconfig | 1 +
drivers/media/platform/qcom/Makefile | 1 +
drivers/media/platform/qcom/iris/Kconfig | 9 +++
drivers/media/platform/qcom/iris/Makefile | 3 +
drivers/media/platform/qcom/iris/iris_core.h | 29 +++++++
drivers/media/platform/qcom/iris/iris_probe.c | 108 ++++++++++++++++++++++++++
6 files changed, 151 insertions(+)

diff --git a/drivers/media/platform/qcom/Kconfig b/drivers/media/platform/qcom/Kconfig
index cc5799b9ea00..4f4d3a68e6e5 100644
--- a/drivers/media/platform/qcom/Kconfig
+++ b/drivers/media/platform/qcom/Kconfig
@@ -3,4 +3,5 @@
comment "Qualcomm media platform drivers"

source "drivers/media/platform/qcom/camss/Kconfig"
+source "drivers/media/platform/qcom/iris/Kconfig"
source "drivers/media/platform/qcom/venus/Kconfig"
diff --git a/drivers/media/platform/qcom/Makefile b/drivers/media/platform/qcom/Makefile
index 4f055c396e04..ea2221a202c0 100644
--- a/drivers/media/platform/qcom/Makefile
+++ b/drivers/media/platform/qcom/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-y += camss/
+obj-y += iris/
obj-y += venus/
diff --git a/drivers/media/platform/qcom/iris/Kconfig b/drivers/media/platform/qcom/iris/Kconfig
new file mode 100644
index 000000000000..a9986aaa448d
--- /dev/null
+++ b/drivers/media/platform/qcom/iris/Kconfig
@@ -0,0 +1,9 @@
+config VIDEO_QCOM_IRIS
+ tristate "Qualcomm Iris V4L2 decoder driver"
+ depends on VIDEO_DEV
+ depends on ARCH_QCOM || COMPILE_TEST
+ help
+ This is a V4L2 driver for Qualcomm Iris video accelerator
+ hardware. It accelerates decoding operations on various
+ Qualcomm SoCs.
+ To compile this driver as a module choose m here.
diff --git a/drivers/media/platform/qcom/iris/Makefile b/drivers/media/platform/qcom/iris/Makefile
new file mode 100644
index 000000000000..913da225486b
--- /dev/null
+++ b/drivers/media/platform/qcom/iris/Makefile
@@ -0,0 +1,3 @@
+iris-objs += iris_probe.o \
+
+obj-$(CONFIG_VIDEO_QCOM_IRIS) += iris.o
diff --git a/drivers/media/platform/qcom/iris/iris_core.h b/drivers/media/platform/qcom/iris/iris_core.h
new file mode 100644
index 000000000000..402f0aaef995
--- /dev/null
+++ b/drivers/media/platform/qcom/iris/iris_core.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _IRIS_CORE_H_
+#define _IRIS_CORE_H_
+
+#include <media/v4l2-device.h>
+
+/**
+ * struct iris_core - holds core parameters valid for all instances
+ *
+ * @dev: reference to device structure
+ * @reg_base: IO memory base address
+ * @irq: iris irq
+ * @v4l2_dev: a holder for v4l2 device structure
+ * @vdev_dec: iris video device structure for decoder
+ */
+
+struct iris_core {
+ struct device *dev;
+ void __iomem *reg_base;
+ int irq;
+ struct v4l2_device v4l2_dev;
+ struct video_device *vdev_dec;
+};
+
+#endif
diff --git a/drivers/media/platform/qcom/iris/iris_probe.c b/drivers/media/platform/qcom/iris/iris_probe.c
new file mode 100644
index 000000000000..0a54fdaa1ab5
--- /dev/null
+++ b/drivers/media/platform/qcom/iris/iris_probe.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/module.h>
+
+#include "iris_core.h"
+
+static int iris_register_video_device(struct iris_core *core)
+{
+ struct video_device *vdev;
+ int ret;
+
+ vdev = video_device_alloc();
+ if (!vdev)
+ return -ENOMEM;
+
+ strscpy(vdev->name, "qcom-iris-decoder", sizeof(vdev->name));
+ vdev->release = video_device_release;
+ vdev->vfl_dir = VFL_DIR_M2M;
+ vdev->v4l2_dev = &core->v4l2_dev;
+ vdev->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+
+ ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
+ if (ret)
+ goto err_vdev_release;
+
+ core->vdev_dec = vdev;
+ video_set_drvdata(vdev, core);
+
+ return 0;
+
+err_vdev_release:
+ video_device_release(vdev);
+
+ return ret;
+}
+
+static void iris_remove(struct platform_device *pdev)
+{
+ struct iris_core *core;
+
+ core = platform_get_drvdata(pdev);
+ if (!core)
+ return;
+
+ video_unregister_device(core->vdev_dec);
+
+ v4l2_device_unregister(&core->v4l2_dev);
+}
+
+static int iris_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct iris_core *core;
+ int ret;
+
+ core = devm_kzalloc(&pdev->dev, sizeof(*core), GFP_KERNEL);
+ if (!core)
+ return -ENOMEM;
+ core->dev = dev;
+
+ core->reg_base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(core->reg_base))
+ return PTR_ERR(core->reg_base);
+
+ core->irq = platform_get_irq(pdev, 0);
+ if (core->irq < 0)
+ return core->irq;
+
+ ret = v4l2_device_register(dev, &core->v4l2_dev);
+ if (ret)
+ return ret;
+
+ ret = iris_register_video_device(core);
+ if (ret)
+ goto err_v4l2_unreg;
+
+ platform_set_drvdata(pdev, core);
+
+ return 0;
+
+err_v4l2_unreg:
+ v4l2_device_unregister(&core->v4l2_dev);
+
+ return ret;
+}
+
+static const struct of_device_id iris_dt_match[] = {
+ { .compatible = "qcom,sm8550-iris", },
+ { .compatible = "qcom,sm8250-venus", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, iris_dt_match);
+
+static struct platform_driver qcom_iris_driver = {
+ .probe = iris_probe,
+ .remove_new = iris_remove,
+ .driver = {
+ .name = "qcom-iris",
+ .of_match_table = iris_dt_match,
+ },
+};
+
+module_platform_driver(qcom_iris_driver);
+MODULE_DESCRIPTION("Qualcomm Iris video driver");
+MODULE_LICENSE("GPL");

--
2.34.1