Date:   Thu, 29 Jun 2017 09:33:29 +0300
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Todor Tomov <todor.tomov@...aro.org>
Cc:     mchehab@...nel.org, hans.verkuil@...co.com, javier@....samsung.com,
        s.nawrocki@...sung.com, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v2 09/19] media: camms: Add core files

Hi Todor,

On Mon, Jun 19, 2017 at 05:48:29PM +0300, Todor Tomov wrote:
> These files implement the platform driver code.
> 
> Signed-off-by: Todor Tomov <todor.tomov@...aro.org>
> ---
>  drivers/media/platform/qcom/camss-8x16/camss.c | 630 +++++++++++++++++++++++++
>  drivers/media/platform/qcom/camss-8x16/camss.h |  96 ++++
>  2 files changed, 726 insertions(+)
>  create mode 100644 drivers/media/platform/qcom/camss-8x16/camss.c
>  create mode 100644 drivers/media/platform/qcom/camss-8x16/camss.h
> 
> diff --git a/drivers/media/platform/qcom/camss-8x16/camss.c b/drivers/media/platform/qcom/camss-8x16/camss.c
> new file mode 100644
> index 0000000..a8798d1
> --- /dev/null
> +++ b/drivers/media/platform/qcom/camss-8x16/camss.c
> @@ -0,0 +1,630 @@
> +/*
> + * camss.c
> + *
> + * Qualcomm MSM Camera Subsystem - Core
> + *
> + * Copyright (c) 2015, The Linux Foundation. All rights reserved.
> + * Copyright (C) 2015-2016 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/media-bus-format.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/of.h>
> +#include <linux/slab.h>
> +
> +#include <media/media-device.h>
> +#include <media/v4l2-async.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-mc.h>
> +#include <media/v4l2-of.h>
> +
> +#include "camss.h"
> +
> +static struct resources csiphy_res[] = {
> +	/* CSIPHY0 */
> +	{
> +		.regulator = { NULL },
> +		.clock = { "camss_top_ahb_clk", "ispif_ahb_clk",
> +			   "camss_ahb_clk", "csiphy0_timer_clk" },
> +		.clock_rate = { 0, 0, 0, 200000000 },
> +		.reg = { "csiphy0", "csiphy0_clk_mux" },
> +		.interrupt = { "csiphy0" }
> +	},
> +
> +	/* CSIPHY1 */
> +	{
> +		.regulator = { NULL },
> +		.clock = { "camss_top_ahb_clk", "ispif_ahb_clk",
> +			   "camss_ahb_clk", "csiphy1_timer_clk" },
> +		.clock_rate = { 0, 0, 0, 200000000 },
> +		.reg = { "csiphy1", "csiphy1_clk_mux" },
> +		.interrupt = { "csiphy1" }
> +	}
> +};
> +
> +static struct resources csid_res[] = {
> +	/* CSID0 */
> +	{
> +		.regulator = { "vdda" },
> +		.clock = { "camss_top_ahb_clk", "ispif_ahb_clk",
> +			   "csi0_ahb_clk", "camss_ahb_clk",
> +			   "csi0_clk", "csi0_phy_clk",
> +			   "csi0_pix_clk", "csi0_rdi_clk" },
> +		.clock_rate = { 0, 0, 0, 0, 200000000, 0, 0, 0 },
> +		.reg = { "csid0" },
> +		.interrupt = { "csid0" }
> +	},
> +
> +	/* CSID1 */
> +	{
> +		.regulator = { "vdda" },
> +		.clock = { "camss_top_ahb_clk", "ispif_ahb_clk",
> +			   "csi1_ahb_clk", "camss_ahb_clk",
> +			   "csi1_clk", "csi1_phy_clk",
> +			   "csi1_pix_clk", "csi1_rdi_clk" },
> +		.clock_rate = { 0, 0, 0, 0, 200000000, 0, 0, 0 },
> +		.reg = { "csid1" },
> +		.interrupt = { "csid1" }
> +	},
> +};
> +
> +static struct resources_ispif ispif_res = {
> +	/* ISPIF */
> +	.clock = { "camss_top_ahb_clk", "camss_ahb_clk", "ispif_ahb_clk",
> +		   "csi0_clk", "csi0_pix_clk", "csi0_rdi_clk",
> +		   "csi1_clk", "csi1_pix_clk", "csi1_rdi_clk" },
> +	.clock_for_reset = { "camss_vfe_vfe_clk", "camss_csi_vfe_clk" },
> +	.reg = { "ispif", "csi_clk_mux" },
> +	.interrupt = "ispif"
> +
> +};
> +
> +static struct resources vfe_res = {
> +	/* VFE0 */
> +	.regulator = { NULL },
> +	.clock = { "camss_top_ahb_clk", "camss_vfe_vfe_clk",
> +		   "camss_csi_vfe_clk", "iface_clk",
> +		   "bus_clk", "camss_ahb_clk" },
> +	.clock_rate = { 0, 320000000, 0, 0, 0, 0, 0, 0 },
> +	.reg = { "vfe0" },
> +	.interrupt = { "vfe0" }
> +};

Could these be const?

> +
> +/*
> + * camss_enable_clocks - Enable multiple clocks
> + * @nclocks: Number of clocks in clock array
> + * @clock: Clock array
> + * @dev: Device
> + *
> + * Return 0 on success or a negative error code otherwise
> + */
> +int camss_enable_clocks(int nclocks, struct clk **clock, struct device *dev)
> +{
> +	int ret;
> +	int i;
> +
> +	for (i = 0; i < nclocks; i++) {
> +		ret = clk_prepare_enable(clock[i]);
> +		if (ret) {
> +			dev_err(dev, "clock enable failed\n");
> +			goto error;
> +		}
> +	}
> +
> +	return 0;
> +
> +error:
> +	for (i--; i >= 0; i--)
> +		clk_disable_unprepare(clock[i]);
> +
> +	return ret;
> +}
> +
> +/*
> + * camss_disable_clocks - Disable multiple clocks
> + * @nclocks: Number of clocks in clock array
> + * @clock: Clock array
> + */
> +void camss_disable_clocks(int nclocks, struct clk **clock)
> +{
> +	int i;
> +
> +	for (i = nclocks - 1; i >= 0; i--)
> +		clk_disable_unprepare(clock[i]);
> +}
> +
> +/*
> + * camss_of_parse_endpoint_node - Parse port endpoint node
> + * @dev: Device
> + * @node: Device node to be parsed
> + * @csd: Parsed data from port endpoint node
> + *
> + * Return 0 on success or a negative error code on failure
> + */
> +static int camss_of_parse_endpoint_node(struct device *dev,
> +					struct device_node *node,
> +					struct camss_async_subdev *csd)
> +{
> +	struct csiphy_lanes_cfg *lncfg = &csd->interface.csi2.lane_cfg;
> +	int *settle_cnt = &csd->interface.csi2.settle_cnt;
> +	struct v4l2_of_bus_mipi_csi2 *mipi_csi2;
> +	struct v4l2_of_endpoint vep = { { 0 } };

Could you rebase on the current media-tree master?

The V4L2 OF framework has been replaced by the V4L2 fwnode framework, with
similar functionality. Mostly changes required are just switching from
v4l2_of_ to v4l2_fwnode_.

> +	unsigned int i;
> +
> +	v4l2_of_parse_endpoint(node, &vep);
> +
> +	csd->interface.csiphy_id = vep.base.port;
> +
> +	mipi_csi2 = &vep.bus.mipi_csi2;
> +	lncfg->clk.pos = mipi_csi2->clock_lane;
> +	lncfg->clk.pol = mipi_csi2->lane_polarities[0];
> +	lncfg->num_data = mipi_csi2->num_data_lanes;
> +
> +	lncfg->data = devm_kzalloc(dev, lncfg->num_data * sizeof(*lncfg->data),
> +				   GFP_KERNEL);
> +	if (!lncfg->data)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < lncfg->num_data; i++) {
> +		lncfg->data[i].pos = mipi_csi2->data_lanes[i];
> +		lncfg->data[i].pol = mipi_csi2->lane_polarities[i + 1];
> +	}
> +
> +	of_property_read_u32(node, "qcom,settle-cnt", settle_cnt);

Isn't this something that depends on the CSI-2 bus speed, for instance?
Could you calculate it instead of putting it to DT?

> +
> +	return 0;
> +}
> +
> +/*
> + * camss_of_parse_ports - Parse ports node
> + * @dev: Device
> + * @notifier: v4l2_device notifier data
> + *
> + * Return number of "port" nodes found in "ports" node
> + */
> +static int camss_of_parse_ports(struct device *dev,
> +				struct v4l2_async_notifier *notifier)
> +{
> +	struct device_node *node = NULL;
> +	unsigned int size, i;
> +	int ret;
> +
> +	while ((node = of_graph_get_next_endpoint(dev->of_node, node)))
> +		if (of_device_is_available(node))
> +			notifier->num_subdevs++;
> +
> +	size = sizeof(*notifier->subdevs) * notifier->num_subdevs;
> +	notifier->subdevs = devm_kzalloc(dev, size, GFP_KERNEL);
> +	if (!notifier->subdevs) {
> +		dev_err(dev, "Failed to allocate memory\n");
> +		return -ENOMEM;
> +	}
> +
> +	i = 0;
> +	while ((node = of_graph_get_next_endpoint(dev->of_node, node))) {
> +		struct camss_async_subdev *csd;
> +
> +		if (!of_device_is_available(node))
> +			continue;
> +
> +		csd = devm_kzalloc(dev, sizeof(*csd), GFP_KERNEL);
> +		if (!csd) {
> +			of_node_put(node);
> +			dev_err(dev, "Failed to allocate memory\n");
> +			return -ENOMEM;
> +		}
> +
> +		notifier->subdevs[i++] = &csd->asd;
> +
> +		ret = camss_of_parse_endpoint_node(dev, node, csd);
> +		if (ret < 0) {
> +			of_node_put(node);
> +			return ret;
> +		}
> +
> +		csd->asd.match.of.node = of_graph_get_remote_port_parent(node);
> +		of_node_put(node);
> +		if (!csd->asd.match.of.node) {
> +			dev_err(dev, "Bad remote port parent\n");
> +			return -EINVAL;
> +		}
> +
> +		csd->asd.match_type = V4L2_ASYNC_MATCH_OF;
> +	}
> +
> +	return notifier->num_subdevs;
> +}
> +
> +/*
> + * camss_init_subdevices - Initialize subdev structures and resources
> + * @camss: CAMSS device
> + *
> + * Return 0 on success or a negative error code on failure
> + */
> +static int camss_init_subdevices(struct camss *camss)
> +{
> +	unsigned int i;
> +	int ret;
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->csiphy); i++) {
> +		ret = msm_csiphy_subdev_init(&camss->csiphy[i],
> +					     &csiphy_res[i], i);
> +		if (ret < 0) {
> +			dev_err(camss->dev,
> +				"Failed to init csiphy%d sub-device\n", i);
> +			return ret;
> +		}
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->csid); i++) {
> +		ret = msm_csid_subdev_init(&camss->csid[i],
> +					   &csid_res[i], i);
> +		if (ret < 0) {
> +			dev_err(camss->dev,
> +				"Failed to init csid%d sub-device\n", i);
> +			return ret;
> +		}
> +	}
> +
> +	ret = msm_ispif_subdev_init(&camss->ispif, &ispif_res);
> +	if (ret < 0) {
> +		dev_err(camss->dev, "Failed to init ispif sub-device\n");
> +		return ret;
> +	}
> +
> +	ret = msm_vfe_subdev_init(&camss->vfe, &vfe_res);
> +	if (ret < 0) {
> +		dev_err(camss->dev, "Fail to init vfe sub-device\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +/*
> + * camss_register_entities - Register subdev nodes and create links
> + * @camss: CAMSS device
> + *
> + * Return 0 on success or a negative error code on failure
> + */
> +static int camss_register_entities(struct camss *camss)
> +{
> +	int i, j;
> +	int ret;
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->csiphy); i++) {
> +		ret = msm_csiphy_register_entity(&camss->csiphy[i],
> +						 &camss->v4l2_dev);
> +		if (ret < 0) {
> +			dev_err(camss->dev,
> +				"Failed to register csiphy%d entity\n", i);
> +			goto err_reg_csiphy;
> +		}
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->csid); i++) {
> +		ret = msm_csid_register_entity(&camss->csid[i],
> +					       &camss->v4l2_dev);
> +		if (ret < 0) {
> +			dev_err(camss->dev,
> +				"Failed to register csid%d entity\n", i);
> +			goto err_reg_csid;
> +		}
> +	}
> +
> +	ret = msm_ispif_register_entities(&camss->ispif, &camss->v4l2_dev);
> +	if (ret < 0) {
> +		dev_err(camss->dev, "Failed to register ispif entities\n");
> +		goto err_reg_ispif;
> +	}

Could you send the media graph (i.e. media-ctl --print-dot) for the device,
please? That'd help understanding the topoogy quite well.

> +
> +	ret = msm_vfe_register_entities(&camss->vfe, &camss->v4l2_dev);
> +	if (ret < 0) {
> +		dev_err(camss->dev, "Failed to register vfe entities\n");
> +		goto err_reg_vfe;
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->csiphy); i++) {
> +		for (j = 0; j < ARRAY_SIZE(camss->csid); j++) {
> +			ret = media_create_pad_link(
> +				&camss->csiphy[i].subdev.entity,
> +				MSM_CSIPHY_PAD_SRC,
> +				&camss->csid[j].subdev.entity,
> +				MSM_CSID_PAD_SINK,
> +				0);
> +			if (ret < 0) {
> +				dev_err(camss->dev,
> +					"Failed to link %s->%s entities\n",
> +					camss->csiphy[i].subdev.entity.name,
> +					camss->csid[j].subdev.entity.name);
> +				goto err_link;
> +			}
> +		}
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->csid); i++) {
> +		for (j = 0; j < ARRAY_SIZE(camss->ispif.line); j++) {
> +			ret = media_create_pad_link(
> +				&camss->csid[i].subdev.entity,
> +				MSM_CSID_PAD_SRC,
> +				&camss->ispif.line[j].subdev.entity,
> +				MSM_ISPIF_PAD_SINK,
> +				0);
> +			if (ret < 0) {
> +				dev_err(camss->dev,
> +					"Failed to link %s->%s entities\n",
> +					camss->csid[i].subdev.entity.name,
> +					camss->ispif.line[j].subdev.entity.name
> +					);
> +				goto err_link;
> +			}
> +		}
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->ispif.line); i++) {
> +		for (j = 0; j < ARRAY_SIZE(camss->vfe.line); j++) {
> +			ret = media_create_pad_link(
> +				&camss->ispif.line[i].subdev.entity,
> +				MSM_ISPIF_PAD_SRC,
> +				&camss->vfe.line[j].subdev.entity,
> +				MSM_VFE_PAD_SINK,
> +				0);
> +			if (ret < 0) {
> +				dev_err(camss->dev,
> +					"Failed to link %s->%s entities\n",
> +					camss->ispif.line[i].subdev.entity.name,
> +					camss->vfe.line[j].subdev.entity.name);
> +				goto err_link;
> +			}
> +		}
> +	}
> +
> +	return 0;
> +
> +err_link:
> +	msm_vfe_unregister_entities(&camss->vfe);
> +err_reg_vfe:
> +	msm_ispif_unregister_entities(&camss->ispif);
> +err_reg_ispif:
> +
> +	i = ARRAY_SIZE(camss->csid);
> +err_reg_csid:
> +	for (i--; i >= 0; i--)
> +		msm_csid_unregister_entity(&camss->csid[i]);
> +
> +	i = ARRAY_SIZE(camss->csiphy);
> +err_reg_csiphy:
> +	for (i--; i >= 0; i--)
> +		msm_csiphy_unregister_entity(&camss->csiphy[i]);
> +
> +	return ret;
> +}
> +
> +/*
> + * camss_unregister_entities - Unregister subdev nodes
> + * @camss: CAMSS device
> + *
> + * Return 0 on success or a negative error code on failure
> + */
> +static void camss_unregister_entities(struct camss *camss)
> +{
> +	unsigned int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->csiphy); i++)
> +		msm_csiphy_unregister_entity(&camss->csiphy[i]);
> +
> +	for (i = 0; i < ARRAY_SIZE(camss->csid); i++)
> +		msm_csid_unregister_entity(&camss->csid[i]);
> +
> +	msm_ispif_unregister_entities(&camss->ispif);
> +	msm_vfe_unregister_entities(&camss->vfe);
> +}
> +
> +static int camss_subdev_notifier_bound(struct v4l2_async_notifier *async,
> +				       struct v4l2_subdev *subdev,
> +				       struct v4l2_async_subdev *asd)
> +{
> +	struct camss *camss = container_of(async, struct camss, notifier);
> +	struct camss_async_subdev *csd =
> +		container_of(asd, struct camss_async_subdev, asd);
> +	u8 id = csd->interface.csiphy_id;
> +	struct csiphy_device *csiphy = &camss->csiphy[id];
> +
> +	csiphy->cfg.csi2 = &csd->interface.csi2;
> +	subdev->host_priv = csiphy;
> +
> +	return 0;
> +}
> +
> +static int camss_subdev_notifier_complete(struct v4l2_async_notifier *async)
> +{
> +	struct camss *camss = container_of(async, struct camss, notifier);
> +	struct v4l2_device *v4l2_dev = &camss->v4l2_dev;
> +	struct v4l2_subdev *sd;
> +	int ret;
> +
> +	list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
> +		if (sd->host_priv) {

if (!sd->host_priv)
	continue;

And you can unindent the rest of the loop. Up to you.

> +			struct media_entity *sensor = &sd->entity;
> +			struct csiphy_device *csiphy =
> +					(struct csiphy_device *) sd->host_priv;
> +			struct media_entity *input = &csiphy->subdev.entity;
> +			unsigned int i;
> +
> +			for (i = 0; i < sensor->num_pads; i++) {
> +				if (sensor->pads[i].flags & MEDIA_PAD_FL_SOURCE)
> +					break;
> +			}
> +			if (i == sensor->num_pads) {
> +				dev_err(camss->dev,
> +					"No source pad in external entity\n");
> +				return -EINVAL;
> +			}
> +
> +			ret = media_create_pad_link(sensor, i,
> +				input, MSM_CSIPHY_PAD_SINK,
> +				MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
> +			if (ret < 0) {
> +				dev_err(camss->dev,
> +					"Failed to link %s->%s entities\n",
> +					sensor->name, input->name);
> +				return ret;
> +			}
> +		}
> +	}
> +
> +	ret = v4l2_device_register_subdev_nodes(&camss->v4l2_dev);
> +	if (ret < 0)
> +		return ret;
> +
> +	return media_device_register(&camss->media_dev);
> +}
> +
> +static const struct media_device_ops camss_media_ops = {
> +	.link_notify = v4l2_pipeline_link_notify,
> +};
> +
> +/*
> + * camss_probe - Probe CAMSS platform device
> + * @pdev: Pointer to CAMSS platform device
> + *
> + * Return 0 on success or a negative error code on failure
> + */
> +static int camss_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct camss *camss;
> +	int ret;
> +
> +	camss = kzalloc(sizeof(*camss), GFP_KERNEL);
> +	if (!camss)
> +		return -ENOMEM;
> +
> +	atomic_set(&camss->ref_count, 0);
> +	camss->dev = dev;
> +	platform_set_drvdata(pdev, camss);
> +
> +	ret = camss_of_parse_ports(dev, &camss->notifier);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = camss_init_subdevices(camss);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = dma_set_mask_and_coherent(dev, 0xffffffff);
> +	if (ret)
> +		return ret;
> +
> +	camss->media_dev.dev = camss->dev;
> +	strlcpy(camss->media_dev.model, "Qualcomm Camera Subsystem",
> +		sizeof(camss->media_dev.model));
> +	camss->media_dev.ops = &camss_media_ops;
> +	media_device_init(&camss->media_dev);
> +
> +	camss->v4l2_dev.mdev = &camss->media_dev;
> +	ret = v4l2_device_register(camss->dev, &camss->v4l2_dev);
> +	if (ret < 0) {
> +		dev_err(dev, "Failed to register V4L2 device\n");
> +		return ret;
> +	}
> +
> +	ret = camss_register_entities(camss);
> +	if (ret < 0)
> +		goto err_register_entities;
> +
> +	if (camss->notifier.num_subdevs) {
> +		camss->notifier.bound = camss_subdev_notifier_bound;
> +		camss->notifier.complete = camss_subdev_notifier_complete;
> +
> +		ret = v4l2_async_notifier_register(&camss->v4l2_dev,
> +						   &camss->notifier);
> +		if (ret) {
> +			dev_err(dev, "Failed to register async subdev nodes");
> +			goto err_register_subdevs;
> +		}
> +	} else {
> +		ret = v4l2_device_register_subdev_nodes(&camss->v4l2_dev);
> +		if (ret < 0) {
> +			dev_err(dev, "Failed to register subdev nodes");
> +			goto err_register_subdevs;
> +		}
> +
> +		ret = media_device_register(&camss->media_dev);
> +		if (ret < 0) {
> +			dev_err(dev, "Failed to register media device");
> +			goto err_register_subdevs;
> +		}
> +	}
> +
> +	return 0;
> +
> +err_register_subdevs:
> +	camss_unregister_entities(camss);
> +err_register_entities:
> +	v4l2_device_unregister(&camss->v4l2_dev);
> +
> +	return ret;
> +}
> +
> +void camss_delete(struct camss *camss)
> +{
> +	v4l2_device_unregister(&camss->v4l2_dev);
> +	media_device_unregister(&camss->media_dev);
> +	media_device_cleanup(&camss->media_dev);
> +
> +	kfree(camss);
> +}
> +
> +/*
> + * camss_remove - Remove CAMSS platform device
> + * @pdev: Pointer to CAMSS platform device
> + *
> + * Always returns 0.
> + */
> +static int camss_remove(struct platform_device *pdev)
> +{
> +	struct camss *camss = platform_get_drvdata(pdev);
> +
> +	msm_vfe_stop_streaming(&camss->vfe);
> +
> +	v4l2_async_notifier_unregister(&camss->notifier);
> +	camss_unregister_entities(camss);
> +
> +	if (atomic_read(&camss->ref_count) == 0)
> +		camss_delete(camss);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id camss_dt_match[] = {
> +	{ .compatible = "qcom,msm8916-camss" },
> +	{ }
> +};
> +
> +MODULE_DEVICE_TABLE(of, camss_dt_match);
> +
> +static struct platform_driver qcom_camss_driver = {
> +	.probe = camss_probe,
> +	.remove = camss_remove,
> +	.driver = {
> +		.name = "qcom-camss",
> +		.of_match_table = camss_dt_match,
> +	},
> +};
> +
> +module_platform_driver(qcom_camss_driver);
> +
> +MODULE_ALIAS("platform:qcom-camss");
> +MODULE_DESCRIPTION("Qualcomm Camera Subsystem driver");
> +MODULE_LICENSE("GPL");

"GPL" or "GPL v2"?

> diff --git a/drivers/media/platform/qcom/camss-8x16/camss.h b/drivers/media/platform/qcom/camss-8x16/camss.h
> new file mode 100644
> index 0000000..e1a8b90
> --- /dev/null
> +++ b/drivers/media/platform/qcom/camss-8x16/camss.h
> @@ -0,0 +1,96 @@
> +/*
> + * camss.h
> + *
> + * Qualcomm MSM Camera Subsystem - Core
> + *
> + * Copyright (c) 2015, The Linux Foundation. All rights reserved.
> + * Copyright (C) 2015-2016 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 QC_MSM_CAMSS_H
> +#define QC_MSM_CAMSS_H
> +
> +#include <linux/types.h>
> +#include <media/v4l2-async.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-subdev.h>
> +#include <media/media-device.h>
> +#include <media/media-entity.h>
> +#include <linux/device.h>
> +
> +#include "csid.h"
> +#include "csiphy.h"
> +#include "ispif.h"
> +#include "vfe.h"
> +
> +#define CAMSS_CSID_NUM 2
> +#define CAMSS_CSIPHY_NUM 2
> +
> +#define to_camss(ptr_module)	\
> +	container_of(ptr_module, struct camss, ptr_module)
> +
> +#define to_device(ptr_module)	\
> +	(to_camss(ptr_module)->dev)
> +
> +#define module_pointer(ptr_module, index)	\
> +	((const struct ptr_module##_device (*)[]) &(ptr_module[-(index)]))
> +
> +#define to_camss_index(ptr_module, index)	\
> +	container_of(module_pointer(ptr_module, index),	\
> +		     struct camss, ptr_module)
> +
> +#define to_device_index(ptr_module, index)	\
> +	(to_camss_index(ptr_module, index)->dev)
> +
> +#define CAMSS_RES_MAX 15
> +
> +struct resources {
> +	char *regulator[CAMSS_RES_MAX];
> +	char *clock[CAMSS_RES_MAX];
> +	s32 clock_rate[CAMSS_RES_MAX];
> +	char *reg[CAMSS_RES_MAX];
> +	char *interrupt[CAMSS_RES_MAX];
> +};
> +
> +struct resources_ispif {
> +	char *clock[CAMSS_RES_MAX];
> +	char *clock_for_reset[CAMSS_RES_MAX];
> +	char *reg[CAMSS_RES_MAX];
> +	char *interrupt;
> +};
> +
> +struct camss {
> +	struct v4l2_device v4l2_dev;
> +	struct v4l2_async_notifier notifier;
> +	struct media_device media_dev;
> +	struct device *dev;
> +	struct csiphy_device csiphy[CAMSS_CSIPHY_NUM];
> +	struct csid_device csid[CAMSS_CSID_NUM];
> +	struct ispif_device ispif;
> +	struct vfe_device vfe;
> +	atomic_t ref_count;
> +};
> +
> +struct camss_camera_interface {
> +	u8 csiphy_id;
> +	struct csiphy_csi2_cfg csi2;
> +};
> +
> +struct camss_async_subdev {
> +	struct camss_camera_interface interface;
> +	struct v4l2_async_subdev asd;
> +};
> +
> +int camss_enable_clocks(int nclocks, struct clk **clock, struct device *dev);
> +void camss_disable_clocks(int nclocks, struct clk **clock);
> +void camss_delete(struct camss *camss);
> +
> +#endif /* QC_MSM_CAMSS_H */

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk

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