[media] media: venus: adding core part and helper functions

* core.c has implemented the platform driver methods, file
operations and v4l2 registration.

 * helpers.c has implemented common helper functions for:
   - buffer management

   - vb2_ops and functions for format propagation,

   - functions for allocating and freeing buffers for
   internal usage. The buffer parameters describing internal
   buffers depends on current format, resolution and codec.

   - functions for calculation of current load of the
   hardware. Depending on the count of instances and
   resolutions it selects the best clock rate for the video
   core.

 * firmware loader
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/qcom/venus/core.c

+/*
+ * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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.
+ *
+ */
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/ioctl.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/pm_runtime.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-ioctl.h>
+
+#include "core.h"
+#include "vdec.h"
+#include "venc.h"
+#include "firmware.h"
+
+static void venus_event_notify(struct venus_core *core, u32 event)
+{
+	struct venus_inst *inst;
+
+	switch (event) {
+	case EVT_SYS_WATCHDOG_TIMEOUT:
+	case EVT_SYS_ERROR:
+		break;
+	default:
+		return;
+	}
+
+	mutex_lock(&core->lock);
+	core->sys_error = true;
+	list_for_each_entry(inst, &core->instances, list)
+		inst->ops->event_notify(inst, EVT_SESSION_ERROR, NULL);
+	mutex_unlock(&core->lock);
+
+	disable_irq_nosync(core->irq);
+
+	/*
+	 * Delay recovery to ensure venus has completed any pending cache
+	 * operations. Without this sleep, we see device reset when firmware is
+	 * unloaded after a system error.
+	 */
+	schedule_delayed_work(&core->work, msecs_to_jiffies(100));
+}
+
+static const struct hfi_core_ops venus_core_ops = {
+	.event_notify = venus_event_notify,
+};
+
+static void venus_sys_error_handler(struct work_struct *work)
+{
+	struct venus_core *core =
+			container_of(work, struct venus_core, work.work);
+	int ret = 0;
+
+	dev_warn(core->dev, "system error has occurred, starting recovery!\n");
+
+	pm_runtime_get_sync(core->dev);
+
+	hfi_core_deinit(core, true);
+	hfi_destroy(core);
+	mutex_lock(&core->lock);
+	venus_shutdown(&core->dev_fw);
+
+	pm_runtime_put_sync(core->dev);
+
+	ret |= hfi_create(core, &venus_core_ops);
+
+	pm_runtime_get_sync(core->dev);
+
+	ret |= venus_boot(core->dev, &core->dev_fw);
+
+	ret |= hfi_core_resume(core, true);
+
+	enable_irq(core->irq);
+
+	mutex_unlock(&core->lock);
+
+	ret |= hfi_core_init(core);
+
+	pm_runtime_put_sync(core->dev);
+
+	if (ret) {
+		disable_irq_nosync(core->irq);
+		dev_warn(core->dev, "recovery failed (%d)\n", ret);
+		schedule_delayed_work(&core->work, msecs_to_jiffies(10));
+		return;
+	}
+
+	mutex_lock(&core->lock);
+	core->sys_error = false;
+	mutex_unlock(&core->lock);
+}
+
+static int venus_clks_get(struct venus_core *core)
+{
+	const struct venus_resources *res = core->res;
+	struct device *dev = core->dev;
+	unsigned int i;
+
+	for (i = 0; i < res->clks_num; i++) {
+		core->clks[i] = devm_clk_get(dev, res->clks[i]);
+		if (IS_ERR(core->clks[i]))
+			return PTR_ERR(core->clks[i]);
+	}
+
+	return 0;
+}
+
+static int venus_clks_enable(struct venus_core *core)
+{
+	const struct venus_resources *res = core->res;
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < res->clks_num; i++) {
+		ret = clk_prepare_enable(core->clks[i]);
+		if (ret)
+			goto err;
+	}
+
+	return 0;
+err:
+	while (--i)
+		clk_disable_unprepare(core->clks[i]);
+
+	return ret;
+}
+
+static void venus_clks_disable(struct venus_core *core)
+{
+	const struct venus_resources *res = core->res;
+	unsigned int i = res->clks_num;
+
+	while (i--)
+		clk_disable_unprepare(core->clks[i]);
+}
+
+static int venus_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct venus_core *core;
+	struct resource *r;
+	int ret;
+
+	core = devm_kzalloc(dev, sizeof(*core), GFP_KERNEL);
+	if (!core)
+		return -ENOMEM;
+
+	core->dev = dev;
+	platform_set_drvdata(pdev, core);
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	core->base = devm_ioremap_resource(dev, r);
+	if (IS_ERR(core->base))
+		return PTR_ERR(core->base);
+
+	core->irq = platform_get_irq(pdev, 0);
+	if (core->irq < 0)
+		return core->irq;
+
+	core->res = of_device_get_match_data(dev);
+	if (!core->res)
+		return -ENODEV;
+
+	ret = venus_clks_get(core);
+	if (ret)
+		return ret;
+
+	ret = dma_set_mask_and_coherent(dev, core->res->dma_mask);
+	if (ret)
+		return ret;
+
+	INIT_LIST_HEAD(&core->instances);
+	mutex_init(&core->lock);
+	INIT_DELAYED_WORK(&core->work, venus_sys_error_handler);
+
+	ret = devm_request_threaded_irq(dev, core->irq, hfi_isr, hfi_isr_thread,
+					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+					"venus", core);
+	if (ret)
+		return ret;
+
+	ret = hfi_create(core, &venus_core_ops);
+	if (ret)
+		return ret;
+
+	pm_runtime_enable(dev);
+
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0)
+		goto err_runtime_disable;
+
+	ret = venus_boot(dev, &core->dev_fw);
+	if (ret)
+		goto err_runtime_disable;
+
+	ret = hfi_core_resume(core, true);
+	if (ret)
+		goto err_venus_shutdown;
+
+	ret = hfi_core_init(core);
+	if (ret)
+		goto err_venus_shutdown;
+
+	ret = v4l2_device_register(dev, &core->v4l2_dev);
+	if (ret)
+		goto err_core_deinit;
+
+	ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
+	if (ret)
+		goto err_dev_unregister;
+
+	ret = pm_runtime_put_sync(dev);
+	if (ret)
+		goto err_dev_unregister;
+
+	return 0;
+
+err_dev_unregister:
+	v4l2_device_unregister(&core->v4l2_dev);
+err_core_deinit:
+	hfi_core_deinit(core, false);
+err_venus_shutdown:
+	venus_shutdown(&core->dev_fw);
+err_runtime_disable:
+	pm_runtime_set_suspended(dev);
+	pm_runtime_disable(dev);
+	hfi_destroy(core);
+	return ret;
+}
+
+static int venus_remove(struct platform_device *pdev)
+{
+	struct venus_core *core = platform_get_drvdata(pdev);
+	struct device *dev = core->dev;
+	int ret;
+
+	ret = pm_runtime_get_sync(dev);
+	WARN_ON(ret < 0);
+
+	ret = hfi_core_deinit(core, true);
+	WARN_ON(ret);
+
+	hfi_destroy(core);
+	venus_shutdown(&core->dev_fw);
+	of_platform_depopulate(dev);
+
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+
+	v4l2_device_unregister(&core->v4l2_dev);
+
+	return ret;
+}
+
+#ifdef CONFIG_PM
+static int venus_runtime_suspend(struct device *dev)
+{
+	struct venus_core *core = dev_get_drvdata(dev);
+	int ret;
+
+	ret = hfi_core_suspend(core);
+
+	venus_clks_disable(core);
+
+	return ret;
+}
+
+static int venus_runtime_resume(struct device *dev)
+{
+	struct venus_core *core = dev_get_drvdata(dev);
+	int ret;
+
+	ret = venus_clks_enable(core);
+	if (ret)
+		return ret;
+
+	ret = hfi_core_resume(core, false);
+	if (ret)
+		goto err_clks_disable;
+
+	return 0;
+
+err_clks_disable:
+	venus_clks_disable(core);
+	return ret;
+}
+#endif
+
+static const struct dev_pm_ops venus_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(venus_runtime_suspend, venus_runtime_resume, NULL)
+};
+
+static const struct freq_tbl msm8916_freq_table[] = {
+	{ 352800, 228570000 },	/* 1920x1088 @ 30 + 1280x720 @ 30 */
+	{ 244800, 160000000 },	/* 1920x1088 @ 30 */
+	{ 108000, 100000000 },	/* 1280x720 @ 30 */
+};
+
+static const struct reg_val msm8916_reg_preset[] = {
+	{ 0xe0020, 0x05555556 },
+	{ 0xe0024, 0x05555556 },
+	{ 0x80124, 0x00000003 },
+};
+
+static const struct venus_resources msm8916_res = {
+	.freq_tbl = msm8916_freq_table,
+	.freq_tbl_size = ARRAY_SIZE(msm8916_freq_table),
+	.reg_tbl = msm8916_reg_preset,
+	.reg_tbl_size = ARRAY_SIZE(msm8916_reg_preset),
+	.clks = { "core", "iface", "bus", },
+	.clks_num = 3,
+	.max_load = 352800, /* 720p@30 + 1080p@30 */
+	.hfi_version = HFI_VERSION_1XX,
+	.vmem_id = VIDC_RESOURCE_NONE,
+	.vmem_size = 0,
+	.vmem_addr = 0,
+	.dma_mask = 0xddc00000 - 1,
+};
+
+static const struct freq_tbl msm8996_freq_table[] = {
+	{ 1944000, 490000000 },	/* 4k UHD @ 60 */
+	{  972000, 320000000 },	/* 4k UHD @ 30 */
+	{  489600, 150000000 },	/* 1080p @ 60 */
+	{  244800,  75000000 },	/* 1080p @ 30 */
+};
+
+static const struct reg_val msm8996_reg_preset[] = {
+	{ 0x80010, 0xffffffff },
+	{ 0x80018, 0x00001556 },
+	{ 0x8001C, 0x00001556 },
+};
+
+static const struct venus_resources msm8996_res = {
+	.freq_tbl = msm8996_freq_table,
+	.freq_tbl_size = ARRAY_SIZE(msm8996_freq_table),
+	.reg_tbl = msm8996_reg_preset,
+	.reg_tbl_size = ARRAY_SIZE(msm8996_reg_preset),
+	.clks = {"core", "iface", "bus", "mbus" },
+	.clks_num = 4,
+	.max_load = 2563200,
+	.hfi_version = HFI_VERSION_3XX,
+	.vmem_id = VIDC_RESOURCE_NONE,
+	.vmem_size = 0,
+	.vmem_addr = 0,
+	.dma_mask = 0xddc00000 - 1,
+};
+
+static const struct of_device_id venus_dt_match[] = {
+	{ .compatible = "qcom,msm8916-venus", .data = &msm8916_res, },
+	{ .compatible = "qcom,msm8996-venus", .data = &msm8996_res, },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, venus_dt_match);
+
+static struct platform_driver qcom_venus_driver = {
+	.probe = venus_probe,
+	.remove = venus_remove,
+	.driver = {
+		.name = "qcom-venus",
+		.of_match_table = venus_dt_match,
+		.pm = &venus_pm_ops,
+	},
+};
+module_platform_driver(qcom_venus_driver);
+
+MODULE_ALIAS("platform:qcom-venus");
+MODULE_DESCRIPTION("Qualcomm Venus video encoder and decoder driver");
+MODULE_LICENSE("GPL v2");

drivers/media/platform/qcom/venus/core.h

+/*
+ * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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.
+ *
+ */
+
+#ifndef __VENUS_CORE_H_
+#define __VENUS_CORE_H_
+
+#include <linux/list.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+
+#include "hfi.h"
+
+#define VIDC_CLKS_NUM_MAX	4
+
+struct freq_tbl {
+	unsigned int load;
+	unsigned long freq;
+};
+
+struct reg_val {
+	u32 reg;
+	u32 value;
+};
+
+struct venus_resources {
+	u64 dma_mask;
+	const struct freq_tbl *freq_tbl;
+	unsigned int freq_tbl_size;
+	const struct reg_val *reg_tbl;
+	unsigned int reg_tbl_size;
+	const char * const clks[VIDC_CLKS_NUM_MAX];
+	unsigned int clks_num;
+	enum hfi_version hfi_version;
+	u32 max_load;
+	unsigned int vmem_id;
+	u32 vmem_size;
+	u32 vmem_addr;
+};
+
+struct venus_format {
+	u32 pixfmt;
+	unsigned int num_planes;
+	u32 type;
+};
+
+/**
+ * struct venus_core - holds core parameters valid for all instances
+ *
+ * @base:	IO memory base address
+ * @irq:		Venus irq
+ * @clks:	an array of struct clk pointers
+ * @core0_clk:	a struct clk pointer for core0
+ * @core1_clk:	a struct clk pointer for core1
+ * @vdev_dec:	a reference to video device structure for decoder instances
+ * @vdev_enc:	a reference to video device structure for encoder instances
+ * @v4l2_dev:	a holder for v4l2 device structure
+ * @res:		a reference to venus resources structure
+ * @dev:		convenience struct device pointer
+ * @dev_dec:	convenience struct device pointer for decoder device
+ * @dev_enc:	convenience struct device pointer for encoder device
+ * @lock:	a lock for this strucure
+ * @instances:	a list_head of all instances
+ * @insts_count:	num of instances
+ * @state:	the state of the venus core
+ * @done:	a completion for sync HFI operations
+ * @error:	an error returned during last HFI sync operations
+ * @sys_error:	an error flag that signal system error event
+ * @core_ops:	the core operations
+ * @enc_codecs:	encoders supported by this core
+ * @dec_codecs:	decoders supported by this core
+ * @max_sessions_supported:	holds the maximum number of sessions
+ * @core_caps:	core capabilities
+ * @priv:	a private filed for HFI operations
+ * @ops:		the core HFI operations
+ * @work:	a delayed work for handling system fatal error
+ */
+struct venus_core {
+	void __iomem *base;
+	int irq;
+	struct clk *clks[VIDC_CLKS_NUM_MAX];
+	struct clk *core0_clk;
+	struct clk *core1_clk;
+	struct video_device *vdev_dec;
+	struct video_device *vdev_enc;
+	struct v4l2_device v4l2_dev;
+	const struct venus_resources *res;
+	struct device *dev;
+	struct device *dev_dec;
+	struct device *dev_enc;
+	struct device dev_fw;
+	struct mutex lock;
+	struct list_head instances;
+	atomic_t insts_count;
+	unsigned int state;
+	struct completion done;
+	unsigned int error;
+	bool sys_error;
+	const struct hfi_core_ops *core_ops;
+	u32 enc_codecs;
+	u32 dec_codecs;
+	unsigned int max_sessions_supported;
+#define ENC_ROTATION_CAPABILITY		0x1
+#define ENC_SCALING_CAPABILITY		0x2
+#define ENC_DEINTERLACE_CAPABILITY	0x4
+#define DEC_MULTI_STREAM_CAPABILITY	0x8
+	unsigned int core_caps;
+	void *priv;
+	const struct hfi_ops *ops;
+	struct delayed_work work;
+};
+
+struct vdec_controls {
+	u32 post_loop_deb_mode;
+	u32 profile;
+	u32 level;
+};
+
+struct venc_controls {
+	u16 gop_size;
+	u32 num_p_frames;
+	u32 num_b_frames;
+	u32 bitrate_mode;
+	u32 bitrate;
+	u32 bitrate_peak;
+
+	u32 h264_i_period;
+	u32 h264_entropy_mode;
+	u32 h264_i_qp;
+	u32 h264_p_qp;
+	u32 h264_b_qp;
+	u32 h264_min_qp;
+	u32 h264_max_qp;
+	u32 h264_loop_filter_mode;
+	u32 h264_loop_filter_alpha;
+	u32 h264_loop_filter_beta;
+
+	u32 vp8_min_qp;
+	u32 vp8_max_qp;
+
+	u32 multi_slice_mode;
+	u32 multi_slice_max_bytes;
+	u32 multi_slice_max_mb;
+
+	u32 header_mode;
+
+	struct {
+		u32 mpeg4;
+		u32 h264;
+		u32 vpx;
+	} profile;
+	struct {
+		u32 mpeg4;
+		u32 h264;
+	} level;
+};
+
+struct venus_buffer {
+	struct vb2_v4l2_buffer vb;
+	struct list_head list;
+	dma_addr_t dma_addr;
+	u32 size;
+	struct list_head reg_list;
+	u32 flags;
+	struct list_head ref_list;
+};
+
+#define to_venus_buffer(ptr)	container_of(ptr, struct venus_buffer, vb)
+
+/**
+ * struct venus_inst - holds per instance paramerters
+ *
+ * @list:	used for attach an instance to the core
+ * @lock:	instance lock
+ * @core:	a reference to the core struct
+ * @internalbufs:	a list of internal bufferes
+ * @registeredbufs:	a list of registered capture bufferes
+ * @delayed_process	a list of delayed buffers
+ * @delayed_process_work:	a work_struct for process delayed buffers
+ * @ctrl_handler:	v4l control handler
+ * @controls:	a union of decoder and encoder control parameters
+ * @fh:	 a holder of v4l file handle structure
+ * @streamon_cap: stream on flag for capture queue
+ * @streamon_out: stream on flag for output queue
+ * @cmd_stop:	a flag to signal encoder/decoder commands
+ * @width:	current capture width
+ * @height:	current capture height
+ * @out_width:	current output width
+ * @out_height:	current output height
+ * @colorspace:	current color space
+ * @quantization:	current quantization
+ * @xfer_func:	current xfer function
+ * @fps:		holds current FPS
+ * @timeperframe:	holds current time per frame structure
+ * @fmt_out:	a reference to output format structure
+ * @fmt_cap:	a reference to capture format structure
+ * @num_input_bufs:	holds number of input buffers
+ * @num_output_bufs:	holds number of output buffers
+ * @input_buf_size	holds input buffer size
+ * @output_buf_size:	holds output buffer size
+ * @reconfig:	a flag raised by decoder when the stream resolution changed
+ * @reconfig_width:	holds the new width
+ * @reconfig_height:	holds the new height
+ * @sequence_cap:	a sequence counter for capture queue
+ * @sequence_out:	a sequence counter for output queue
+ * @m2m_dev:	a reference to m2m device structure
+ * @m2m_ctx:	a reference to m2m context structure
+ * @state:	current state of the instance
+ * @done:	a completion for sync HFI operation
+ * @error:	an error returned during last HFI sync operation
+ * @session_error:	a flag rised by HFI interface in case of session error
+ * @ops:		HFI operations
+ * @priv:	a private for HFI operations callbacks
+ * @session_type:	the type of the session (decoder or encoder)
+ * @hprop:	a union used as a holder by get property
+ * @cap_width:	width capability
+ * @cap_height:	height capability
+ * @cap_mbs_per_frame:	macroblocks per frame capability
+ * @cap_mbs_per_sec:	macroblocks per second capability
+ * @cap_framerate:	framerate capability
+ * @cap_scale_x:		horizontal scaling capability
+ * @cap_scale_y:		vertical scaling capability
+ * @cap_bitrate:		bitrate capability
+ * @cap_hier_p:		hier capability
+ * @cap_ltr_count:	LTR count capability
+ * @cap_secure_output2_threshold: secure OUTPUT2 threshold capability
+ * @cap_bufs_mode_static:	buffers allocation mode capability
+ * @cap_bufs_mode_dynamic:	buffers allocation mode capability
+ * @pl_count:	count of supported profiles/levels
+ * @pl:		supported profiles/levels
+ * @bufreq:	holds buffer requirements
+ */
+struct venus_inst {
+	struct list_head list;
+	struct mutex lock;
+	struct venus_core *core;
+	struct list_head internalbufs;
+	struct list_head registeredbufs;
+	struct list_head delayed_process;
+	struct work_struct delayed_process_work;
+
+	struct v4l2_ctrl_handler ctrl_handler;
+	union {
+		struct vdec_controls dec;
+		struct venc_controls enc;
+	} controls;
+	struct v4l2_fh fh;
+	unsigned int streamon_cap, streamon_out;
+	bool cmd_stop;
+	u32 width;
+	u32 height;
+	u32 out_width;
+	u32 out_height;
+	u32 colorspace;
+	u8 ycbcr_enc;
+	u8 quantization;
+	u8 xfer_func;
+	u64 fps;
+	struct v4l2_fract timeperframe;
+	const struct venus_format *fmt_out;
+	const struct venus_format *fmt_cap;
+	unsigned int num_input_bufs;
+	unsigned int num_output_bufs;
+	unsigned int input_buf_size;
+	unsigned int output_buf_size;
+	bool reconfig;
+	u32 reconfig_width;
+	u32 reconfig_height;
+	u32 sequence_cap;
+	u32 sequence_out;
+	struct v4l2_m2m_dev *m2m_dev;
+	struct v4l2_m2m_ctx *m2m_ctx;
+	unsigned int state;
+	struct completion done;
+	unsigned int error;
+	bool session_error;
+	const struct hfi_inst_ops *ops;
+	u32 session_type;
+	union hfi_get_property hprop;
+	struct hfi_capability cap_width;
+	struct hfi_capability cap_height;
+	struct hfi_capability cap_mbs_per_frame;
+	struct hfi_capability cap_mbs_per_sec;
+	struct hfi_capability cap_framerate;
+	struct hfi_capability cap_scale_x;
+	struct hfi_capability cap_scale_y;
+	struct hfi_capability cap_bitrate;
+	struct hfi_capability cap_hier_p;
+	struct hfi_capability cap_ltr_count;
+	struct hfi_capability cap_secure_output2_threshold;
+	bool cap_bufs_mode_static;
+	bool cap_bufs_mode_dynamic;
+	unsigned int pl_count;
+	struct hfi_profile_level pl[HFI_MAX_PROFILE_COUNT];
+	struct hfi_buffer_requirements bufreq[HFI_BUFFER_TYPE_MAX];
+};
+
+#define ctrl_to_inst(ctrl)	\
+	container_of((ctrl)->handler, struct venus_inst, ctrl_handler)
+
+static inline struct venus_inst *to_inst(struct file *filp)
+{
+	return container_of(filp->private_data, struct venus_inst, fh);
+}
+
+static inline void *to_hfi_priv(struct venus_core *core)
+{
+	return core->priv;
+}
+
+#endif

drivers/media/platform/qcom/venus/firmware.c

+/*
+ * Copyright (C) 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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.
+ *
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/slab.h>
+#include <linux/qcom_scm.h>
+#include <linux/soc/qcom/mdt_loader.h>
+
+#include "firmware.h"
+
+#define VENUS_FIRMWARE_NAME		"venus.mdt"
+#define VENUS_PAS_ID			9
+#define VENUS_FW_MEM_SIZE		SZ_8M
+
+static void device_release_dummy(struct device *dev)
+{
+	of_reserved_mem_device_release(dev);
+}
+
+int venus_boot(struct device *parent, struct device *fw_dev)
+{
+	const struct firmware *mdt;
+	phys_addr_t mem_phys;
+	ssize_t fw_size;
+	size_t mem_size;
+	void *mem_va;
+	int ret;
+
+	if (!qcom_scm_is_available())
+		return -EPROBE_DEFER;
+
+	fw_dev->parent = parent;
+	fw_dev->release = device_release_dummy;
+
+	ret = dev_set_name(fw_dev, "%s:%s", dev_name(parent), "firmware");
+	if (ret)
+		return ret;
+
+	ret = device_register(fw_dev);
+	if (ret < 0)
+		return ret;
+
+	ret = of_reserved_mem_device_init_by_idx(fw_dev, parent->of_node, 0);
+	if (ret)
+		goto err_unreg_device;
+
+	mem_size = VENUS_FW_MEM_SIZE;
+
+	mem_va = dmam_alloc_coherent(fw_dev, mem_size, &mem_phys, GFP_KERNEL);
+	if (!mem_va) {
+		ret = -ENOMEM;
+		goto err_unreg_device;
+	}
+
+	ret = request_firmware(&mdt, VENUS_FIRMWARE_NAME, fw_dev);
+	if (ret < 0)
+		goto err_unreg_device;
+
+	fw_size = qcom_mdt_get_size(mdt);
+	if (fw_size < 0) {
+		ret = fw_size;
+		release_firmware(mdt);
+		goto err_unreg_device;
+	}
+
+	ret = qcom_mdt_load(fw_dev, mdt, VENUS_FIRMWARE_NAME, VENUS_PAS_ID,
+			    mem_va, mem_phys, mem_size);
+
+	release_firmware(mdt);
+
+	if (ret)
+		goto err_unreg_device;
+
+	ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
+	if (ret)
+		goto err_unreg_device;
+
+	return 0;
+
+err_unreg_device:
+	device_unregister(fw_dev);
+	return ret;
+}
+
+int venus_shutdown(struct device *fw_dev)
+{
+	int ret;
+
+	ret = qcom_scm_pas_shutdown(VENUS_PAS_ID);
+	device_unregister(fw_dev);
+	memset(fw_dev, 0, sizeof(*fw_dev));
+
+	return ret;
+}

drivers/media/platform/qcom/venus/firmware.h

+/*
+ * Copyright (C) 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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.
+ *
+ */
+#ifndef __VENUS_FIRMWARE_H__
+#define __VENUS_FIRMWARE_H__
+
+struct device;
+
+int venus_boot(struct device *parent, struct device *fw_dev);
+int venus_shutdown(struct device *fw_dev);
+
+#endif

drivers/media/platform/qcom/venus/helpers.h

+/*
+ * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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.
+ *
+ */
+#ifndef __VENUS_HELPERS_H__
+#define __VENUS_HELPERS_H__
+
+#include <media/videobuf2-v4l2.h>
+
+struct venus_inst;
+
+struct vb2_v4l2_buffer *venus_helper_find_buf(struct venus_inst *inst,
+					      unsigned int type, u32 idx);
+void venus_helper_buffers_done(struct venus_inst *inst,
+			       enum vb2_buffer_state state);
+int venus_helper_vb2_buf_init(struct vb2_buffer *vb);
+int venus_helper_vb2_buf_prepare(struct vb2_buffer *vb);
+void venus_helper_vb2_buf_queue(struct vb2_buffer *vb);
+void venus_helper_vb2_stop_streaming(struct vb2_queue *q);
+int venus_helper_vb2_start_streaming(struct venus_inst *inst);
+void venus_helper_m2m_device_run(void *priv);
+void venus_helper_m2m_job_abort(void *priv);
+int venus_helper_get_bufreq(struct venus_inst *inst, u32 type,
+			    struct hfi_buffer_requirements *req);
+int venus_helper_set_input_resolution(struct venus_inst *inst,
+				      unsigned int width, unsigned int height);
+int venus_helper_set_output_resolution(struct venus_inst *inst,
+				       unsigned int width, unsigned int height);
+int venus_helper_set_num_bufs(struct venus_inst *inst, unsigned int input_bufs,
+			      unsigned int output_bufs);
+int venus_helper_set_color_format(struct venus_inst *inst, u32 fmt);
+void venus_helper_acquire_buf_ref(struct vb2_v4l2_buffer *vbuf);
+void venus_helper_release_buf_ref(struct venus_inst *inst, unsigned int idx);
+void venus_helper_init_instance(struct venus_inst *inst);
+#endif