Re: [PATCH v7 4/9] media: venus: adding core part and helper functions

From: Hans Verkuil
Date: Fri Mar 24 2017 - 10:24:21 EST

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Some review comments below:

On 03/13/17 17:37, Stanimir Varbanov wrote:
> * core.c has implemented the platform dirver methods, file

dirver -> driver

> 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@xxxxxxxxxx>
> ---
> drivers/media/platform/qcom/venus/core.c | 386 ++++++++++++++++
> drivers/media/platform/qcom/venus/core.h | 306 +++++++++++++
> drivers/media/platform/qcom/venus/firmware.c | 107 +++++
> drivers/media/platform/qcom/venus/firmware.h | 22 +
> drivers/media/platform/qcom/venus/helpers.c | 632 +++++++++++++++++++++++++++
> drivers/media/platform/qcom/venus/helpers.h | 41 ++
> 6 files changed, 1494 insertions(+)
> create mode 100644 drivers/media/platform/qcom/venus/core.c
> create mode 100644 drivers/media/platform/qcom/venus/core.h
> create mode 100644 drivers/media/platform/qcom/venus/firmware.c
> create mode 100644 drivers/media/platform/qcom/venus/firmware.h
> create mode 100644 drivers/media/platform/qcom/venus/helpers.c
> create mode 100644 drivers/media/platform/qcom/venus/helpers.h
>
> diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
> new file mode 100644
> index 000000000000..557b6ec4cc48
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/core.c
> @@ -0,0 +1,386 @@
> +/*
> + * 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 const struct hfi_core_ops venus_core_ops;
> +
> +static void venus_sys_error_handler(struct work_struct *work)
> +{
> + struct venus_core *core =
> + container_of(work, struct venus_core, work.work);
> + int ret;
> +
> + dev_warn(core->dev, "system error 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);

Why assign to ret if you're going to ignore it anyway? Either drop the assignment
or do something with it.

> +
> + enable_irq(core->irq);
> +
> + mutex_unlock(&core->lock);
> +
> + ret = hfi_core_init(core);
> + if (ret)
> + dev_err(core->dev, "hfi_core_init (%d)\n", ret);
> +
> + pm_runtime_put_sync(core->dev);
> +
> + core->sys_error = false;
> +}
> +
> +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);
> +
> + /*
> + * Sleep for 5 sec 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 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_LEGACY,
> + .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");
> diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
> new file mode 100644
> index 000000000000..c2380c1a9ee5
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/core.h
> @@ -0,0 +1,306 @@
> +/*
> + * 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;
> + 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: convinience struct device pointer
> + * @dev_dec: convinience struct device pointer for decoder device
> + * @dev_enc: convinience 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;
> +
> + u32 profile;
> + u32 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;
> +};
> +
> +#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
> + * @ctrl_handler: v4l control handler
> + * @controls: an union of decoder and encoder control parameters
> + * @fh: a holder of v4l file handle structure
> + * @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: a sequence counter
> + * @codec_cfg: a flag used to annonce a codec configuration
> + * @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: an 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 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;
> + 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;
> + u64 sequence;
> + bool codec_cfg;
> + 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];

Just a suggestion: this might work better if you split it in groups of
related fields with a comment above each group that gives an indication
of what it is for. It's a solid block of fields right now and I think
it can be made a bit easier to read that way.

> +};
> +
> +#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
> diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
> new file mode 100644
> index 000000000000..e0601a94f3f0
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/firmware.c
> @@ -0,0 +1,107 @@
> +/*
> + * 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>
> +
> +#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;
> +}
> diff --git a/drivers/media/platform/qcom/venus/firmware.h b/drivers/media/platform/qcom/venus/firmware.h
> new file mode 100644
> index 000000000000..782e64ae291a
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/firmware.h
> @@ -0,0 +1,22 @@
> +/*
> + * 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
> diff --git a/drivers/media/platform/qcom/venus/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
> new file mode 100644
> index 000000000000..2b4a3e3e04e2
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/helpers.c
> @@ -0,0 +1,632 @@
> +/*
> + * 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/list.h>
> +#include <linux/mutex.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/slab.h>
> +#include <media/videobuf2-dma-sg.h>
> +#include <media/v4l2-mem2mem.h>
> +
> +#include "core.h"
> +#include "helpers.h"
> +#include "hfi_helper.h"
> +
> +struct intbuf {
> + struct list_head list;
> + u32 type;
> + size_t size;
> + void *va;
> + dma_addr_t da;
> + unsigned long attrs;
> +};
> +
> +static int intbufs_set_buffer(struct venus_inst *inst, u32 type)
> +{
> + struct venus_core *core = inst->core;
> + struct device *dev = core->dev;
> + struct hfi_buffer_requirements bufreq;
> + struct hfi_buffer_desc bd;
> + struct intbuf *buf;
> + unsigned int i;
> + int ret;
> +
> + ret = helper_get_bufreq(inst, type, &bufreq);
> + if (ret)
> + return 0;
> +
> + if (!bufreq.size)
> + return 0;
> +
> + for (i = 0; i < bufreq.count_actual; i++) {
> + buf = kzalloc(sizeof(*buf), GFP_KERNEL);
> + if (!buf) {
> + ret = -ENOMEM;
> + goto fail;
> + }
> +
> + buf->type = bufreq.type;
> + buf->size = bufreq.size;
> + buf->attrs = DMA_ATTR_WRITE_COMBINE |
> + DMA_ATTR_NO_KERNEL_MAPPING;
> + buf->va = dma_alloc_attrs(dev, buf->size, &buf->da, GFP_KERNEL,
> + buf->attrs);
> + if (!buf->va) {
> + ret = -ENOMEM;
> + goto fail;
> + }
> +
> + memset(&bd, 0, sizeof(bd));
> + bd.buffer_size = buf->size;
> + bd.buffer_type = buf->type;
> + bd.num_buffers = 1;
> + bd.device_addr = buf->da;
> +
> + ret = hfi_session_set_buffers(inst, &bd);
> + if (ret) {
> + dev_err(dev, "set session buffers failed\n");
> + goto dma_free;
> + }
> +
> + list_add_tail(&buf->list, &inst->internalbufs);
> + }
> +
> + return 0;
> +
> +dma_free:
> + dma_free_attrs(dev, buf->size, buf->va, buf->da, buf->attrs);
> +fail:
> + kfree(buf);
> + return ret;
> +}
> +
> +static int intbufs_unset_buffers(struct venus_inst *inst)
> +{
> + struct hfi_buffer_desc bd = {0};
> + struct intbuf *buf, *n;
> + int ret = 0;
> +
> + list_for_each_entry_safe(buf, n, &inst->internalbufs, list) {
> + bd.buffer_size = buf->size;
> + bd.buffer_type = buf->type;
> + bd.num_buffers = 1;
> + bd.device_addr = buf->da;
> + bd.response_required = true;
> +
> + ret = hfi_session_unset_buffers(inst, &bd);
> +
> + list_del(&buf->list);
> + dma_free_attrs(inst->core->dev, buf->size, buf->va, buf->da,
> + buf->attrs);
> + kfree(buf);
> + }
> +
> + return ret;
> +}
> +
> +static const unsigned int intbuf_types[] = {
> + HFI_BUFFER_INTERNAL_SCRATCH,
> + HFI_BUFFER_INTERNAL_SCRATCH_1,
> + HFI_BUFFER_INTERNAL_SCRATCH_2,
> + HFI_BUFFER_INTERNAL_PERSIST,
> + HFI_BUFFER_INTERNAL_PERSIST_1,
> +};
> +
> +static int intbufs_alloc(struct venus_inst *inst)
> +{
> + unsigned int i;
> + int ret;
> +
> + for (i = 0; i < ARRAY_SIZE(intbuf_types); i++) {
> + ret = intbufs_set_buffer(inst, intbuf_types[i]);
> + if (ret)
> + goto error;
> + }
> +
> + return 0;
> +
> +error:
> + intbufs_unset_buffers(inst);
> + return ret;
> +}
> +
> +static int intbufs_free(struct venus_inst *inst)
> +{
> + return intbufs_unset_buffers(inst);
> +}
> +
> +static u32 load_per_instance(struct venus_inst *inst)
> +{
> + u32 w = inst->width;
> + u32 h = inst->height;
> + u32 mbs;
> +
> + if (!inst || !(inst->state >= INST_INIT && inst->state < INST_STOP))
> + return 0;
> +
> + mbs = (ALIGN(w, 16) / 16) * (ALIGN(h, 16) / 16);
> +
> + return mbs * inst->fps;
> +}
> +
> +static u32 load_per_type(struct venus_core *core, u32 session_type)
> +{
> + struct venus_inst *inst = NULL;
> + u32 mbs_per_sec = 0;
> +
> + mutex_lock(&core->lock);
> + list_for_each_entry(inst, &core->instances, list) {
> + if (inst->session_type != session_type)
> + continue;
> +
> + mbs_per_sec += load_per_instance(inst);
> + }
> + mutex_unlock(&core->lock);
> +
> + return mbs_per_sec;
> +}
> +
> +static int load_scale_clocks(struct venus_core *core)
> +{
> + const struct freq_tbl *table = core->res->freq_tbl;
> + unsigned int num_rows = core->res->freq_tbl_size;
> + unsigned long freq = table[0].freq;
> + struct clk *clk = core->clks[0];
> + struct device *dev = core->dev;
> + u32 mbs_per_sec;
> + unsigned int i;
> + int ret;
> +
> + mbs_per_sec = load_per_type(core, VIDC_SESSION_TYPE_ENC) +
> + load_per_type(core, VIDC_SESSION_TYPE_DEC);
> +
> + if (mbs_per_sec > core->res->max_load)
> + dev_warn(dev, "HW is overloaded, needed: %d max: %d\n",
> + mbs_per_sec, core->res->max_load);
> +
> + if (!mbs_per_sec && num_rows > 1) {
> + freq = table[num_rows - 1].freq;
> + goto set_freq;
> + }
> +
> + for (i = 0; i < num_rows; i++) {
> + if (mbs_per_sec > table[i].load)
> + break;
> + freq = table[i].freq;
> + }
> +
> +set_freq:
> +
> + if (core->res->hfi_version == HFI_VERSION_3XX) {
> + ret = clk_set_rate(clk, freq);
> + ret |= clk_set_rate(core->core0_clk, freq);
> + ret |= clk_set_rate(core->core1_clk, freq);
> + } else {
> + ret = clk_set_rate(clk, freq);
> + }
> +
> + if (ret) {
> + dev_err(dev, "failed to set clock rate %lu (%d)\n", freq, ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static void fill_buffer_desc(const struct venus_buffer *buf,
> + struct hfi_buffer_desc *bd, bool response)
> +{
> + memset(bd, 0, sizeof(*bd));
> + bd->buffer_type = HFI_BUFFER_OUTPUT;
> + bd->buffer_size = buf->size;
> + bd->num_buffers = 1;
> + bd->device_addr = buf->dma_addr;
> + bd->response_required = response;
> +}
> +
> +static void return_buf_error(struct venus_inst *inst,
> + struct vb2_v4l2_buffer *vbuf)
> +{
> + struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
> +
> + if (vbuf->vb2_buf.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
> + v4l2_m2m_src_buf_remove_by_buf(m2m_ctx, vbuf);
> + else
> + v4l2_m2m_src_buf_remove_by_buf(m2m_ctx, vbuf);
> +
> + v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
> +}
> +
> +static int
> +session_process_buf(struct venus_inst *inst, struct vb2_v4l2_buffer *vbuf)
> +{
> + struct venus_buffer *buf = to_venus_buffer(vbuf);
> + struct vb2_buffer *vb = &vbuf->vb2_buf;
> + unsigned int type = vb->type;
> + struct hfi_frame_data fdata;
> + int ret;
> +
> + memset(&fdata, 0, sizeof(fdata));
> + fdata.alloc_len = buf->size;
> + fdata.device_addr = buf->dma_addr;
> + fdata.timestamp = vb->timestamp / NSEC_PER_USEC;
> + fdata.flags = 0;
> + fdata.clnt_data = vbuf->vb2_buf.index;
> +
> + if (!fdata.timestamp)
> + fdata.flags |= HFI_BUFFERFLAG_TIMESTAMPINVALID;
> +
> + if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
> + fdata.buffer_type = HFI_BUFFER_INPUT;
> + fdata.filled_len = vb2_get_plane_payload(vb, 0);
> + fdata.offset = vb->planes[0].data_offset;
> +
> + if (vbuf->flags & V4L2_BUF_FLAG_LAST || !fdata.filled_len)
> + fdata.flags |= HFI_BUFFERFLAG_EOS;
> +
> + if (inst->codec_cfg == false &&
> + inst->session_type == VIDC_SESSION_TYPE_DEC) {
> + inst->codec_cfg = true;
> + fdata.flags |= HFI_BUFFERFLAG_CODECCONFIG;
> + }
> + } else if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
> + fdata.buffer_type = HFI_BUFFER_OUTPUT;
> + fdata.filled_len = 0;
> + fdata.offset = 0;
> + }
> +
> + ret = hfi_session_process_buf(inst, &fdata);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int session_unregister_bufs(struct venus_inst *inst)
> +{
> + struct venus_core *core = inst->core;
> + struct hfi_buffer_desc bd;
> + struct venus_buffer *buf, *n;
> + int ret = 0;
> +
> + if (core->res->hfi_version == HFI_VERSION_3XX)
> + return 0;
> +
> + list_for_each_entry_safe(buf, n, &inst->registeredbufs, reg_list) {
> + fill_buffer_desc(buf, &bd, true);
> + ret = hfi_session_unset_buffers(inst, &bd);
> + list_del(&buf->reg_list);
> + }
> +
> + return ret;
> +}
> +
> +static int session_register_bufs(struct venus_inst *inst)
> +{
> + struct venus_core *core = inst->core;
> + struct device *dev = core->dev;
> + struct hfi_buffer_desc bd;
> + struct venus_buffer *buf;
> + int ret = 0;
> +
> + if (core->res->hfi_version == HFI_VERSION_3XX)
> + return 0;
> +
> + list_for_each_entry(buf, &inst->registeredbufs, reg_list) {
> + fill_buffer_desc(buf, &bd, false);
> + ret = hfi_session_set_buffers(inst, &bd);
> + if (ret) {
> + dev_err(dev, "%s: set buffer failed\n", __func__);
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> +int helper_get_bufreq(struct venus_inst *inst, u32 type,
> + struct hfi_buffer_requirements *req)
> +{
> + u32 ptype = HFI_PROPERTY_CONFIG_BUFFER_REQUIREMENTS;
> + union hfi_get_property hprop;
> + int ret, i;
> +
> + if (req)
> + memset(req, 0, sizeof(*req));
> +
> + ret = hfi_session_get_property(inst, ptype, &hprop);
> + if (ret)
> + return ret;
> +
> + ret = -EINVAL;
> +
> + for (i = 0; i < HFI_BUFFER_TYPE_MAX; i++) {
> + if (hprop.bufreq[i].type != type)
> + continue;
> +
> + if (req)
> + memcpy(req, &hprop.bufreq[i], sizeof(*req));
> + ret = 0;
> + break;
> + }
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(helper_get_bufreq);
> +
> +int helper_set_input_resolution(struct venus_inst *inst, unsigned int width,
> + unsigned int height)
> +{
> + u32 ptype = HFI_PROPERTY_PARAM_FRAME_SIZE;
> + struct hfi_framesize fs;
> +
> + fs.buffer_type = HFI_BUFFER_INPUT;
> + fs.width = width;
> + fs.height = height;
> +
> + return hfi_session_set_property(inst, ptype, &fs);
> +}
> +EXPORT_SYMBOL(helper_set_input_resolution);
> +
> +int helper_set_output_resolution(struct venus_inst *inst, unsigned int width,
> + unsigned int height)
> +{
> + u32 ptype = HFI_PROPERTY_PARAM_FRAME_SIZE;
> + struct hfi_framesize fs;
> +
> + fs.buffer_type = HFI_BUFFER_OUTPUT;
> + fs.width = width;
> + fs.height = height;
> +
> + return hfi_session_set_property(inst, ptype, &fs);
> +}
> +EXPORT_SYMBOL(helper_set_output_resolution);
> +
> +int helper_set_num_bufs(struct venus_inst *inst, unsigned int input_bufs,
> + unsigned int output_bufs)
> +{
> + u32 ptype = HFI_PROPERTY_PARAM_BUFFER_COUNT_ACTUAL;
> + struct hfi_buffer_count_actual buf_count;
> + int ret;
> +
> + buf_count.type = HFI_BUFFER_INPUT;
> + buf_count.count_actual = input_bufs;
> +
> + ret = hfi_session_set_property(inst, ptype, &buf_count);
> + if (ret)
> + return ret;
> +
> + buf_count.type = HFI_BUFFER_OUTPUT;
> + buf_count.count_actual = output_bufs;
> +
> + return hfi_session_set_property(inst, ptype, &buf_count);
> +}
> +EXPORT_SYMBOL(helper_set_num_bufs);
> +
> +int helper_set_color_format(struct venus_inst *inst, u32 pixfmt)
> +{
> + struct hfi_uncompressed_format_select fmt;
> + u32 ptype = HFI_PROPERTY_PARAM_UNCOMPRESSED_FORMAT_SELECT;
> + int ret;
> +
> + if (inst->session_type == VIDC_SESSION_TYPE_DEC)
> + fmt.buffer_type = HFI_BUFFER_OUTPUT;
> + else if (inst->session_type == VIDC_SESSION_TYPE_ENC)
> + fmt.buffer_type = HFI_BUFFER_INPUT;
> + else
> + return -EINVAL;
> +
> + switch (pixfmt) {
> + case V4L2_PIX_FMT_NV12:
> + fmt.format = HFI_COLOR_FORMAT_NV12;
> + break;
> + case V4L2_PIX_FMT_NV21:
> + fmt.format = HFI_COLOR_FORMAT_NV21;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + ret = hfi_session_set_property(inst, ptype, &fmt);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(helper_set_color_format);
> +
> +struct vb2_v4l2_buffer *
> +helper_find_buf(struct venus_inst *inst, unsigned int type, u32 idx)
> +{
> + struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
> +
> + if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
> + return v4l2_m2m_src_buf_remove_by_idx(m2m_ctx, idx);
> + else
> + return v4l2_m2m_dst_buf_remove_by_idx(m2m_ctx, idx);
> +}
> +EXPORT_SYMBOL(helper_find_buf);
> +
> +int helper_vb2_buf_init(struct vb2_buffer *vb)
> +{
> + struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct venus_buffer *buf = to_venus_buffer(vbuf);
> + struct sg_table *sgt;
> +
> + sgt = vb2_dma_sg_plane_desc(vb, 0);
> + if (!sgt)
> + return -EFAULT;
> +
> + buf->size = vb2_plane_size(vb, 0);
> + buf->dma_addr = sg_dma_address(sgt->sgl);
> +
> + if (vb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> + list_add_tail(&buf->reg_list, &inst->registeredbufs);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(helper_vb2_buf_init);
> +
> +int helper_vb2_buf_prepare(struct vb2_buffer *vb)
> +{
> + struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
> +
> + if (vb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE &&
> + vb2_plane_size(vb, 0) < inst->output_buf_size)
> + return -EINVAL;
> + else if (vb2_plane_size(vb, 0) < inst->input_buf_size)

This logic can't be right: if type == CAPTURE and the plane_size
>= output_buf_size, then it will fall into the 'else' and check
the same plane_size against the input_buf_size, which is clearly
wrong for a CAPTURE buffer.

> + return -EINVAL;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(helper_vb2_buf_prepare);
> +
> +void helper_vb2_buf_queue(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
> + struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
> + int ret;
> +
> + mutex_lock(&inst->lock);
> +
> + v4l2_m2m_buf_queue(m2m_ctx, vbuf);
> +
> + if (!(inst->streamon_out & inst->streamon_cap))
> + goto unlock;
> +
> + ret = session_process_buf(inst, vbuf);
> + if (ret)
> + return_buf_error(inst, vbuf);
> +
> +unlock:
> + mutex_unlock(&inst->lock);
> +}
> +EXPORT_SYMBOL(helper_vb2_buf_queue);
> +
> +void helper_buffers_done(struct venus_inst *inst, enum vb2_buffer_state state)
> +{
> + struct vb2_v4l2_buffer *buf;
> +
> + while ((buf = v4l2_m2m_src_buf_remove(inst->m2m_ctx)))
> + v4l2_m2m_buf_done(buf, state);
> + while ((buf = v4l2_m2m_dst_buf_remove(inst->m2m_ctx)))
> + v4l2_m2m_buf_done(buf, state);
> +}
> +EXPORT_SYMBOL(helper_buffers_done);
> +
> +void helper_vb2_stop_streaming(struct vb2_queue *q)
> +{
> + struct venus_inst *inst = vb2_get_drv_priv(q);
> + struct venus_core *core = inst->core;
> + int ret;
> +
> + mutex_lock(&inst->lock);
> +
> + if (inst->streamon_out & inst->streamon_cap) {
> + ret = hfi_session_stop(inst);
> + ret |= hfi_session_unload_res(inst);
> + ret |= session_unregister_bufs(inst);
> + ret |= intbufs_free(inst);
> + ret |= hfi_session_deinit(inst);
> +
> + if (inst->session_error || core->sys_error)
> + ret = -EIO;
> +
> + if (ret)
> + hfi_session_abort(inst);
> +
> + load_scale_clocks(core);
> + }
> +
> + helper_buffers_done(inst, VB2_BUF_STATE_ERROR);
> +
> + if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
> + inst->streamon_out = 0;
> + else
> + inst->streamon_cap = 0;
> +
> + mutex_unlock(&inst->lock);
> +}
> +EXPORT_SYMBOL(helper_vb2_stop_streaming);
> +
> +int helper_vb2_start_streaming(struct venus_inst *inst)
> +{
> + struct venus_core *core = inst->core;
> + int ret;
> +
> + ret = intbufs_alloc(inst);
> + if (ret)
> + return ret;
> +
> + ret = session_register_bufs(inst);
> + if (ret)
> + goto err_bufs_free;
> +
> + load_scale_clocks(core);
> +
> + ret = hfi_session_load_res(inst);
> + if (ret)
> + goto err_unreg_bufs;
> +
> + ret = hfi_session_start(inst);
> + if (ret)
> + goto err_unload_res;
> +
> + return 0;
> +
> +err_unload_res:
> + hfi_session_unload_res(inst);
> +err_unreg_bufs:
> + session_unregister_bufs(inst);
> +err_bufs_free:
> + intbufs_free(inst);
> + return ret;
> +}
> +EXPORT_SYMBOL(helper_vb2_start_streaming);
> +
> +void helper_m2m_device_run(void *priv)
> +{
> + struct venus_inst *inst = priv;
> + struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
> + struct v4l2_m2m_buffer *buf, *n;
> + int ret;
> +
> + mutex_lock(&inst->lock);
> +
> + v4l2_m2m_for_each_dst_buf_safe(m2m_ctx, buf, n) {
> + ret = session_process_buf(inst, &buf->vb);
> + if (ret)
> + return_buf_error(inst, &buf->vb);
> + }
> +
> + v4l2_m2m_for_each_src_buf_safe(m2m_ctx, buf, n) {
> + ret = session_process_buf(inst, &buf->vb);
> + if (ret)
> + return_buf_error(inst, &buf->vb);
> + }
> +
> + mutex_unlock(&inst->lock);
> +}
> +EXPORT_SYMBOL(helper_m2m_device_run);
> +
> +void helper_m2m_job_abort(void *priv)
> +{
> + struct venus_inst *inst = priv;
> +
> + v4l2_m2m_job_finish(inst->m2m_dev, inst->m2m_ctx);
> +}
> +EXPORT_SYMBOL(helper_m2m_job_abort);
> diff --git a/drivers/media/platform/qcom/venus/helpers.h b/drivers/media/platform/qcom/venus/helpers.h
> new file mode 100644
> index 000000000000..348baa93cf9b
> --- /dev/null
> +++ b/drivers/media/platform/qcom/venus/helpers.h
> @@ -0,0 +1,41 @@
> +/*
> + * 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 *helper_find_buf(struct venus_inst *inst,
> + unsigned int type, u32 idx);
> +void helper_buffers_done(struct venus_inst *inst, enum vb2_buffer_state state);
> +int helper_vb2_buf_init(struct vb2_buffer *vb);
> +int helper_vb2_buf_prepare(struct vb2_buffer *vb);
> +void helper_vb2_buf_queue(struct vb2_buffer *vb);
> +void helper_vb2_stop_streaming(struct vb2_queue *q);
> +int helper_vb2_start_streaming(struct venus_inst *inst);
> +void helper_m2m_device_run(void *priv);
> +void helper_m2m_job_abort(void *priv);
> +int helper_get_bufreq(struct venus_inst *inst, u32 type,
> + struct hfi_buffer_requirements *req);
> +int helper_set_input_resolution(struct venus_inst *inst, unsigned int width,
> + unsigned int height);
> +int helper_set_output_resolution(struct venus_inst *inst, unsigned int width,
> + unsigned int height);
> +int helper_set_num_bufs(struct venus_inst *inst, unsigned int input_bufs,
> + unsigned int output_bufs);
> +int helper_set_color_format(struct venus_inst *inst, u32 fmt);
> +#endif
>

Regards,

Hans

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