Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 4446 insertions, 0 deletions

diff --git a/drivers/staging/media/deprecated/atmel/Kconfig b/drivers/staging/media/deprecated/atmel/Kconfig
new file mode 100644
index 0000000000..418841ea5a
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/Kconfig
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+comment "Atmel media platform drivers"
+
+config VIDEO_ATMEL_ISC
+	tristate "ATMEL Image Sensor Controller (ISC) support (DEPRECATED)"
+	depends on V4L_PLATFORM_DRIVERS
+	depends on VIDEO_DEV && COMMON_CLK
+	depends on ARCH_AT91 || COMPILE_TEST
+	depends on !VIDEO_MICROCHIP_ISC_BASE || COMPILE_TEST
+	select MEDIA_CONTROLLER
+	select VIDEO_V4L2_SUBDEV_API
+	select VIDEOBUF2_DMA_CONTIG
+	select REGMAP_MMIO
+	select V4L2_FWNODE
+	select VIDEO_ATMEL_ISC_BASE
+	help
+	   This module makes the ATMEL Image Sensor Controller available
+	   as a v4l2 device.
+
+	   This driver is deprecated and is scheduled for removal by
+	   the beginning of 2026. See the TODO file for more information.
+
+config VIDEO_ATMEL_XISC
+	tristate "ATMEL eXtended Image Sensor Controller (XISC) support (DEPRECATED)"
+	depends on V4L_PLATFORM_DRIVERS
+	depends on VIDEO_DEV && COMMON_CLK
+	depends on ARCH_AT91 || COMPILE_TEST
+	depends on !VIDEO_MICROCHIP_ISC_BASE || COMPILE_TEST
+	select VIDEOBUF2_DMA_CONTIG
+	select REGMAP_MMIO
+	select V4L2_FWNODE
+	select VIDEO_ATMEL_ISC_BASE
+	select MEDIA_CONTROLLER
+	select VIDEO_V4L2_SUBDEV_API
+	help
+	   This module makes the ATMEL eXtended Image Sensor Controller
+	   available as a v4l2 device.
+
+	   This driver is deprecated and is scheduled for removal by
+	   the beginning of 2026. See the TODO file for more information.
+
+config VIDEO_ATMEL_ISC_BASE
+	tristate
+	default n
+	help
+	  ATMEL ISC and XISC common code base.
diff --git a/drivers/staging/media/deprecated/atmel/Makefile b/drivers/staging/media/deprecated/atmel/Makefile
new file mode 100644
index 0000000000..34eaeeac5b
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+atmel-isc-objs = atmel-sama5d2-isc.o
+atmel-xisc-objs = atmel-sama7g5-isc.o
+atmel-isc-common-objs = atmel-isc-base.o atmel-isc-clk.o
+
+obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE) += atmel-isc-common.o
+obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o
+obj-$(CONFIG_VIDEO_ATMEL_XISC) += atmel-xisc.o
diff --git a/drivers/staging/media/deprecated/atmel/TODO b/drivers/staging/media/deprecated/atmel/TODO
new file mode 100644
index 0000000000..71691df07a
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/TODO
@@ -0,0 +1,34 @@
+The Atmel ISC driver is not compliant with media controller specification.
+In order to evolve this driver, it has to move to media controller, to
+support enhanced features and future products which embed it.
+The move to media controller involves several changes which are
+not backwards compatible with the current usability of the driver.
+
+The best example is the way the format is propagated from the top video
+driver /dev/videoX down to the sensor.
+
+In a simple configuration sensor ==> isc , the isc just calls subdev s_fmt
+and controls the sensor directly. This is achieved by having a lot of code
+inside the driver that will query the subdev at probe time and make a list
+of formats which are usable.
+Basically the user has nothing to configure, as the isc will handle
+everything at the top level. This is an easy way to capture, but also comes
+with the drawback of lack of flexibility.
+In a more complicated pipeline
+sensor ==> controller 1 ==> controller 2 ==> isc
+this will not be achievable, as controller 1 and controller 2 might be
+media-controller configurable, and will not propagate the formats down to
+the sensor.
+
+After discussions with the media maintainers, the decision is to move
+Atmel ISC to staging as-is, to keep the Kconfig symbols and the users
+to the driver in staging. Thus, all the existing users of the non
+media-controller paradigm will continue to be happy and use the old config
+way.
+
+The new driver was added in the media subsystem with a different
+symbol, with the conversion to media controller done, and new users
+of the driver will be able to use all the new features.
+
+The replacement driver is named VIDEO_MICROCHIP_ISC or
+VIDEO_MICROCHIP_XISC depending on the product flavor.
diff --git a/drivers/staging/media/deprecated/atmel/atmel-isc-base.c b/drivers/staging/media/deprecated/atmel/atmel-isc-base.c
new file mode 100644
index 0000000000..f5d9639042
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/atmel-isc-base.c
@@ -0,0 +1,2012 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Microchip Image Sensor Controller (ISC) common driver base
+ *
+ * Copyright (C) 2016-2019 Microchip Technology, Inc.
+ *
+ * Author: Songjun Wu
+ * Author: Eugen Hristev <eugen.hristev@microchip.com>
+ *
+ */
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/videodev2.h>
+#include <linux/atmel-isc-media.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-image-sizes.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "atmel-isc-regs.h"
+#include "atmel-isc.h"
+
+static unsigned int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "debug level (0-2)");
+
+static unsigned int sensor_preferred = 1;
+module_param(sensor_preferred, uint, 0644);
+MODULE_PARM_DESC(sensor_preferred,
+		 "Sensor is preferred to output the specified format (1-on 0-off), default 1");
+
+#define ISC_IS_FORMAT_RAW(mbus_code) \
+	(((mbus_code) & 0xf000) == 0x3000)
+
+#define ISC_IS_FORMAT_GREY(mbus_code) \
+	(((mbus_code) == MEDIA_BUS_FMT_Y10_1X10) | \
+	(((mbus_code) == MEDIA_BUS_FMT_Y8_1X8)))
+
+static inline void isc_update_v4l2_ctrls(struct isc_device *isc)
+{
+	struct isc_ctrls *ctrls = &isc->ctrls;
+
+	/* In here we set the v4l2 controls w.r.t. our pipeline config */
+	v4l2_ctrl_s_ctrl(isc->r_gain_ctrl, ctrls->gain[ISC_HIS_CFG_MODE_R]);
+	v4l2_ctrl_s_ctrl(isc->b_gain_ctrl, ctrls->gain[ISC_HIS_CFG_MODE_B]);
+	v4l2_ctrl_s_ctrl(isc->gr_gain_ctrl, ctrls->gain[ISC_HIS_CFG_MODE_GR]);
+	v4l2_ctrl_s_ctrl(isc->gb_gain_ctrl, ctrls->gain[ISC_HIS_CFG_MODE_GB]);
+
+	v4l2_ctrl_s_ctrl(isc->r_off_ctrl, ctrls->offset[ISC_HIS_CFG_MODE_R]);
+	v4l2_ctrl_s_ctrl(isc->b_off_ctrl, ctrls->offset[ISC_HIS_CFG_MODE_B]);
+	v4l2_ctrl_s_ctrl(isc->gr_off_ctrl, ctrls->offset[ISC_HIS_CFG_MODE_GR]);
+	v4l2_ctrl_s_ctrl(isc->gb_off_ctrl, ctrls->offset[ISC_HIS_CFG_MODE_GB]);
+}
+
+static inline void isc_update_awb_ctrls(struct isc_device *isc)
+{
+	struct isc_ctrls *ctrls = &isc->ctrls;
+
+	/* In here we set our actual hw pipeline config */
+
+	regmap_write(isc->regmap, ISC_WB_O_RGR,
+		     ((ctrls->offset[ISC_HIS_CFG_MODE_R])) |
+		     ((ctrls->offset[ISC_HIS_CFG_MODE_GR]) << 16));
+	regmap_write(isc->regmap, ISC_WB_O_BGB,
+		     ((ctrls->offset[ISC_HIS_CFG_MODE_B])) |
+		     ((ctrls->offset[ISC_HIS_CFG_MODE_GB]) << 16));
+	regmap_write(isc->regmap, ISC_WB_G_RGR,
+		     ctrls->gain[ISC_HIS_CFG_MODE_R] |
+		     (ctrls->gain[ISC_HIS_CFG_MODE_GR] << 16));
+	regmap_write(isc->regmap, ISC_WB_G_BGB,
+		     ctrls->gain[ISC_HIS_CFG_MODE_B] |
+		     (ctrls->gain[ISC_HIS_CFG_MODE_GB] << 16));
+}
+
+static inline void isc_reset_awb_ctrls(struct isc_device *isc)
+{
+	unsigned int c;
+
+	for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) {
+		/* gains have a fixed point at 9 decimals */
+		isc->ctrls.gain[c] = 1 << 9;
+		/* offsets are in 2's complements */
+		isc->ctrls.offset[c] = 0;
+	}
+}
+
+
+static int isc_queue_setup(struct vb2_queue *vq,
+			    unsigned int *nbuffers, unsigned int *nplanes,
+			    unsigned int sizes[], struct device *alloc_devs[])
+{
+	struct isc_device *isc = vb2_get_drv_priv(vq);
+	unsigned int size = isc->fmt.fmt.pix.sizeimage;
+
+	if (*nplanes)
+		return sizes[0] < size ? -EINVAL : 0;
+
+	*nplanes = 1;
+	sizes[0] = size;
+
+	return 0;
+}
+
+static int isc_buffer_prepare(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
+	unsigned long size = isc->fmt.fmt.pix.sizeimage;
+
+	if (vb2_plane_size(vb, 0) < size) {
+		v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n",
+			 vb2_plane_size(vb, 0), size);
+		return -EINVAL;
+	}
+
+	vb2_set_plane_payload(vb, 0, size);
+
+	vbuf->field = isc->fmt.fmt.pix.field;
+
+	return 0;
+}
+
+static void isc_crop_pfe(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+	u32 h, w;
+
+	h = isc->fmt.fmt.pix.height;
+	w = isc->fmt.fmt.pix.width;
+
+	/*
+	 * In case the sensor is not RAW, it will output a pixel (12-16 bits)
+	 * with two samples on the ISC Data bus (which is 8-12)
+	 * ISC will count each sample, so, we need to multiply these values
+	 * by two, to get the real number of samples for the required pixels.
+	 */
+	if (!ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) {
+		h <<= 1;
+		w <<= 1;
+	}
+
+	/*
+	 * We limit the column/row count that the ISC will output according
+	 * to the configured resolution that we want.
+	 * This will avoid the situation where the sensor is misconfigured,
+	 * sending more data, and the ISC will just take it and DMA to memory,
+	 * causing corruption.
+	 */
+	regmap_write(regmap, ISC_PFE_CFG1,
+		     (ISC_PFE_CFG1_COLMIN(0) & ISC_PFE_CFG1_COLMIN_MASK) |
+		     (ISC_PFE_CFG1_COLMAX(w - 1) & ISC_PFE_CFG1_COLMAX_MASK));
+
+	regmap_write(regmap, ISC_PFE_CFG2,
+		     (ISC_PFE_CFG2_ROWMIN(0) & ISC_PFE_CFG2_ROWMIN_MASK) |
+		     (ISC_PFE_CFG2_ROWMAX(h - 1) & ISC_PFE_CFG2_ROWMAX_MASK));
+
+	regmap_update_bits(regmap, ISC_PFE_CFG0,
+			   ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN,
+			   ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN);
+}
+
+static void isc_start_dma(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+	u32 sizeimage = isc->fmt.fmt.pix.sizeimage;
+	u32 dctrl_dview;
+	dma_addr_t addr0;
+
+	addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0);
+	regmap_write(regmap, ISC_DAD0 + isc->offsets.dma, addr0);
+
+	switch (isc->config.fourcc) {
+	case V4L2_PIX_FMT_YUV420:
+		regmap_write(regmap, ISC_DAD1 + isc->offsets.dma,
+			     addr0 + (sizeimage * 2) / 3);
+		regmap_write(regmap, ISC_DAD2 + isc->offsets.dma,
+			     addr0 + (sizeimage * 5) / 6);
+		break;
+	case V4L2_PIX_FMT_YUV422P:
+		regmap_write(regmap, ISC_DAD1 + isc->offsets.dma,
+			     addr0 + sizeimage / 2);
+		regmap_write(regmap, ISC_DAD2 + isc->offsets.dma,
+			     addr0 + (sizeimage * 3) / 4);
+		break;
+	default:
+		break;
+	}
+
+	dctrl_dview = isc->config.dctrl_dview;
+
+	regmap_write(regmap, ISC_DCTRL + isc->offsets.dma,
+		     dctrl_dview | ISC_DCTRL_IE_IS);
+	spin_lock(&isc->awb_lock);
+	regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE);
+	spin_unlock(&isc->awb_lock);
+}
+
+static void isc_set_pipeline(struct isc_device *isc, u32 pipeline)
+{
+	struct regmap *regmap = isc->regmap;
+	struct isc_ctrls *ctrls = &isc->ctrls;
+	u32 val, bay_cfg;
+	const u32 *gamma;
+	unsigned int i;
+
+	/* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
+	for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
+		val = pipeline & BIT(i) ? 1 : 0;
+		regmap_field_write(isc->pipeline[i], val);
+	}
+
+	if (!pipeline)
+		return;
+
+	bay_cfg = isc->config.sd_format->cfa_baycfg;
+
+	regmap_write(regmap, ISC_WB_CFG, bay_cfg);
+	isc_update_awb_ctrls(isc);
+	isc_update_v4l2_ctrls(isc);
+
+	regmap_write(regmap, ISC_CFA_CFG, bay_cfg | ISC_CFA_CFG_EITPOL);
+
+	gamma = &isc->gamma_table[ctrls->gamma_index][0];
+	regmap_bulk_write(regmap, ISC_GAM_BENTRY, gamma, GAMMA_ENTRIES);
+	regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES);
+	regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES);
+
+	isc->config_dpc(isc);
+	isc->config_csc(isc);
+	isc->config_cbc(isc);
+	isc->config_cc(isc);
+	isc->config_gam(isc);
+}
+
+static int isc_update_profile(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+	u32 sr;
+	int counter = 100;
+
+	regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO);
+
+	regmap_read(regmap, ISC_CTRLSR, &sr);
+	while ((sr & ISC_CTRL_UPPRO) && counter--) {
+		usleep_range(1000, 2000);
+		regmap_read(regmap, ISC_CTRLSR, &sr);
+	}
+
+	if (counter < 0) {
+		v4l2_warn(&isc->v4l2_dev, "Time out to update profile\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static void isc_set_histogram(struct isc_device *isc, bool enable)
+{
+	struct regmap *regmap = isc->regmap;
+	struct isc_ctrls *ctrls = &isc->ctrls;
+
+	if (enable) {
+		regmap_write(regmap, ISC_HIS_CFG + isc->offsets.his,
+			     ISC_HIS_CFG_MODE_GR |
+			     (isc->config.sd_format->cfa_baycfg
+					<< ISC_HIS_CFG_BAYSEL_SHIFT) |
+					ISC_HIS_CFG_RAR);
+		regmap_write(regmap, ISC_HIS_CTRL + isc->offsets.his,
+			     ISC_HIS_CTRL_EN);
+		regmap_write(regmap, ISC_INTEN, ISC_INT_HISDONE);
+		ctrls->hist_id = ISC_HIS_CFG_MODE_GR;
+		isc_update_profile(isc);
+		regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
+
+		ctrls->hist_stat = HIST_ENABLED;
+	} else {
+		regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE);
+		regmap_write(regmap, ISC_HIS_CTRL + isc->offsets.his,
+			     ISC_HIS_CTRL_DIS);
+
+		ctrls->hist_stat = HIST_DISABLED;
+	}
+}
+
+static int isc_configure(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+	u32 pfe_cfg0, dcfg, mask, pipeline;
+	struct isc_subdev_entity *subdev = isc->current_subdev;
+
+	pfe_cfg0 = isc->config.sd_format->pfe_cfg0_bps;
+	pipeline = isc->config.bits_pipeline;
+
+	dcfg = isc->config.dcfg_imode | isc->dcfg;
+
+	pfe_cfg0  |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE;
+	mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW |
+	       ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW |
+	       ISC_PFE_CFG0_MODE_MASK | ISC_PFE_CFG0_CCIR_CRC |
+	       ISC_PFE_CFG0_CCIR656 | ISC_PFE_CFG0_MIPI;
+
+	regmap_update_bits(regmap, ISC_PFE_CFG0, mask, pfe_cfg0);
+
+	isc->config_rlp(isc);
+
+	regmap_write(regmap, ISC_DCFG + isc->offsets.dma, dcfg);
+
+	/* Set the pipeline */
+	isc_set_pipeline(isc, pipeline);
+
+	/*
+	 * The current implemented histogram is available for RAW R, B, GB, GR
+	 * channels. We need to check if sensor is outputting RAW BAYER
+	 */
+	if (isc->ctrls.awb &&
+	    ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
+		isc_set_histogram(isc, true);
+	else
+		isc_set_histogram(isc, false);
+
+	/* Update profile */
+	return isc_update_profile(isc);
+}
+
+static int isc_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct isc_device *isc = vb2_get_drv_priv(vq);
+	struct regmap *regmap = isc->regmap;
+	struct isc_buffer *buf;
+	unsigned long flags;
+	int ret;
+
+	/* Enable stream on the sub device */
+	ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1);
+	if (ret && ret != -ENOIOCTLCMD) {
+		v4l2_err(&isc->v4l2_dev, "stream on failed in subdev %d\n",
+			 ret);
+		goto err_start_stream;
+	}
+
+	ret = pm_runtime_resume_and_get(isc->dev);
+	if (ret < 0) {
+		v4l2_err(&isc->v4l2_dev, "RPM resume failed in subdev %d\n",
+			 ret);
+		goto err_pm_get;
+	}
+
+	ret = isc_configure(isc);
+	if (unlikely(ret))
+		goto err_configure;
+
+	/* Enable DMA interrupt */
+	regmap_write(regmap, ISC_INTEN, ISC_INT_DDONE);
+
+	spin_lock_irqsave(&isc->dma_queue_lock, flags);
+
+	isc->sequence = 0;
+	isc->stop = false;
+	reinit_completion(&isc->comp);
+
+	isc->cur_frm = list_first_entry(&isc->dma_queue,
+					struct isc_buffer, list);
+	list_del(&isc->cur_frm->list);
+
+	isc_crop_pfe(isc);
+	isc_start_dma(isc);
+
+	spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
+
+	/* if we streaming from RAW, we can do one-shot white balance adj */
+	if (ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
+		v4l2_ctrl_activate(isc->do_wb_ctrl, true);
+
+	return 0;
+
+err_configure:
+	pm_runtime_put_sync(isc->dev);
+err_pm_get:
+	v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
+
+err_start_stream:
+	spin_lock_irqsave(&isc->dma_queue_lock, flags);
+	list_for_each_entry(buf, &isc->dma_queue, list)
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+	INIT_LIST_HEAD(&isc->dma_queue);
+	spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
+
+	return ret;
+}
+
+static void isc_stop_streaming(struct vb2_queue *vq)
+{
+	struct isc_device *isc = vb2_get_drv_priv(vq);
+	unsigned long flags;
+	struct isc_buffer *buf;
+	int ret;
+
+	mutex_lock(&isc->awb_mutex);
+	v4l2_ctrl_activate(isc->do_wb_ctrl, false);
+
+	isc->stop = true;
+
+	/* Wait until the end of the current frame */
+	if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ))
+		v4l2_err(&isc->v4l2_dev,
+			 "Timeout waiting for end of the capture\n");
+
+	mutex_unlock(&isc->awb_mutex);
+
+	/* Disable DMA interrupt */
+	regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE);
+
+	pm_runtime_put_sync(isc->dev);
+
+	/* Disable stream on the sub device */
+	ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
+	if (ret && ret != -ENOIOCTLCMD)
+		v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n");
+
+	/* Release all active buffers */
+	spin_lock_irqsave(&isc->dma_queue_lock, flags);
+	if (unlikely(isc->cur_frm)) {
+		vb2_buffer_done(&isc->cur_frm->vb.vb2_buf,
+				VB2_BUF_STATE_ERROR);
+		isc->cur_frm = NULL;
+	}
+	list_for_each_entry(buf, &isc->dma_queue, list)
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+	INIT_LIST_HEAD(&isc->dma_queue);
+	spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
+}
+
+static void isc_buffer_queue(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb);
+	struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
+	unsigned long flags;
+
+	spin_lock_irqsave(&isc->dma_queue_lock, flags);
+	if (!isc->cur_frm && list_empty(&isc->dma_queue) &&
+		vb2_start_streaming_called(vb->vb2_queue)) {
+		isc->cur_frm = buf;
+		isc_start_dma(isc);
+	} else
+		list_add_tail(&buf->list, &isc->dma_queue);
+	spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
+}
+
+static struct isc_format *find_format_by_fourcc(struct isc_device *isc,
+						 unsigned int fourcc)
+{
+	unsigned int num_formats = isc->num_user_formats;
+	struct isc_format *fmt;
+	unsigned int i;
+
+	for (i = 0; i < num_formats; i++) {
+		fmt = isc->user_formats[i];
+		if (fmt->fourcc == fourcc)
+			return fmt;
+	}
+
+	return NULL;
+}
+
+static const struct vb2_ops isc_vb2_ops = {
+	.queue_setup		= isc_queue_setup,
+	.wait_prepare		= vb2_ops_wait_prepare,
+	.wait_finish		= vb2_ops_wait_finish,
+	.buf_prepare		= isc_buffer_prepare,
+	.start_streaming	= isc_start_streaming,
+	.stop_streaming		= isc_stop_streaming,
+	.buf_queue		= isc_buffer_queue,
+};
+
+static int isc_querycap(struct file *file, void *priv,
+			 struct v4l2_capability *cap)
+{
+	struct isc_device *isc = video_drvdata(file);
+
+	strscpy(cap->driver, "microchip-isc", sizeof(cap->driver));
+	strscpy(cap->card, "Atmel Image Sensor Controller", sizeof(cap->card));
+	snprintf(cap->bus_info, sizeof(cap->bus_info),
+		 "platform:%s", isc->v4l2_dev.name);
+
+	return 0;
+}
+
+static int isc_enum_fmt_vid_cap(struct file *file, void *priv,
+				 struct v4l2_fmtdesc *f)
+{
+	struct isc_device *isc = video_drvdata(file);
+	u32 index = f->index;
+	u32 i, supported_index;
+
+	if (index < isc->controller_formats_size) {
+		f->pixelformat = isc->controller_formats[index].fourcc;
+		return 0;
+	}
+
+	index -= isc->controller_formats_size;
+
+	supported_index = 0;
+
+	for (i = 0; i < isc->formats_list_size; i++) {
+		if (!ISC_IS_FORMAT_RAW(isc->formats_list[i].mbus_code) ||
+		    !isc->formats_list[i].sd_support)
+			continue;
+		if (supported_index == index) {
+			f->pixelformat = isc->formats_list[i].fourcc;
+			return 0;
+		}
+		supported_index++;
+	}
+
+	return -EINVAL;
+}
+
+static int isc_g_fmt_vid_cap(struct file *file, void *priv,
+			      struct v4l2_format *fmt)
+{
+	struct isc_device *isc = video_drvdata(file);
+
+	*fmt = isc->fmt;
+
+	return 0;
+}
+
+/*
+ * Checks the current configured format, if ISC can output it,
+ * considering which type of format the ISC receives from the sensor
+ */
+static int isc_try_validate_formats(struct isc_device *isc)
+{
+	int ret;
+	bool bayer = false, yuv = false, rgb = false, grey = false;
+
+	/* all formats supported by the RLP module are OK */
+	switch (isc->try_config.fourcc) {
+	case V4L2_PIX_FMT_SBGGR8:
+	case V4L2_PIX_FMT_SGBRG8:
+	case V4L2_PIX_FMT_SGRBG8:
+	case V4L2_PIX_FMT_SRGGB8:
+	case V4L2_PIX_FMT_SBGGR10:
+	case V4L2_PIX_FMT_SGBRG10:
+	case V4L2_PIX_FMT_SGRBG10:
+	case V4L2_PIX_FMT_SRGGB10:
+	case V4L2_PIX_FMT_SBGGR12:
+	case V4L2_PIX_FMT_SGBRG12:
+	case V4L2_PIX_FMT_SGRBG12:
+	case V4L2_PIX_FMT_SRGGB12:
+		ret = 0;
+		bayer = true;
+		break;
+
+	case V4L2_PIX_FMT_YUV420:
+	case V4L2_PIX_FMT_YUV422P:
+	case V4L2_PIX_FMT_YUYV:
+	case V4L2_PIX_FMT_UYVY:
+	case V4L2_PIX_FMT_VYUY:
+		ret = 0;
+		yuv = true;
+		break;
+
+	case V4L2_PIX_FMT_RGB565:
+	case V4L2_PIX_FMT_ABGR32:
+	case V4L2_PIX_FMT_XBGR32:
+	case V4L2_PIX_FMT_ARGB444:
+	case V4L2_PIX_FMT_ARGB555:
+		ret = 0;
+		rgb = true;
+		break;
+	case V4L2_PIX_FMT_GREY:
+	case V4L2_PIX_FMT_Y10:
+	case V4L2_PIX_FMT_Y16:
+		ret = 0;
+		grey = true;
+		break;
+	default:
+	/* any other different formats are not supported */
+		ret = -EINVAL;
+	}
+	v4l2_dbg(1, debug, &isc->v4l2_dev,
+		 "Format validation, requested rgb=%u, yuv=%u, grey=%u, bayer=%u\n",
+		 rgb, yuv, grey, bayer);
+
+	/* we cannot output RAW if we do not receive RAW */
+	if ((bayer) && !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code))
+		return -EINVAL;
+
+	/* we cannot output GREY if we do not receive RAW/GREY */
+	if (grey && !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code) &&
+	    !ISC_IS_FORMAT_GREY(isc->try_config.sd_format->mbus_code))
+		return -EINVAL;
+
+	return ret;
+}
+
+/*
+ * Configures the RLP and DMA modules, depending on the output format
+ * configured for the ISC.
+ * If direct_dump == true, just dump raw data 8/16 bits depending on format.
+ */
+static int isc_try_configure_rlp_dma(struct isc_device *isc, bool direct_dump)
+{
+	isc->try_config.rlp_cfg_mode = 0;
+
+	switch (isc->try_config.fourcc) {
+	case V4L2_PIX_FMT_SBGGR8:
+	case V4L2_PIX_FMT_SGBRG8:
+	case V4L2_PIX_FMT_SGRBG8:
+	case V4L2_PIX_FMT_SRGGB8:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 8;
+		isc->try_config.bpp_v4l2 = 8;
+		break;
+	case V4L2_PIX_FMT_SBGGR10:
+	case V4L2_PIX_FMT_SGBRG10:
+	case V4L2_PIX_FMT_SGRBG10:
+	case V4L2_PIX_FMT_SRGGB10:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	case V4L2_PIX_FMT_SBGGR12:
+	case V4L2_PIX_FMT_SGBRG12:
+	case V4L2_PIX_FMT_SGRBG12:
+	case V4L2_PIX_FMT_SRGGB12:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	case V4L2_PIX_FMT_RGB565:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_RGB565;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	case V4L2_PIX_FMT_ARGB444:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB444;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	case V4L2_PIX_FMT_ARGB555:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB555;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	case V4L2_PIX_FMT_ABGR32:
+	case V4L2_PIX_FMT_XBGR32:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB32;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 32;
+		isc->try_config.bpp_v4l2 = 32;
+		break;
+	case V4L2_PIX_FMT_YUV420:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC420P;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR;
+		isc->try_config.bpp = 12;
+		isc->try_config.bpp_v4l2 = 8; /* only first plane */
+		break;
+	case V4L2_PIX_FMT_YUV422P:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC422P;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 8; /* only first plane */
+		break;
+	case V4L2_PIX_FMT_YUYV:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YCYC | ISC_RLP_CFG_YMODE_YUYV;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	case V4L2_PIX_FMT_UYVY:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YCYC | ISC_RLP_CFG_YMODE_UYVY;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	case V4L2_PIX_FMT_VYUY:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YCYC | ISC_RLP_CFG_YMODE_VYUY;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	case V4L2_PIX_FMT_GREY:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY8;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 8;
+		isc->try_config.bpp_v4l2 = 8;
+		break;
+	case V4L2_PIX_FMT_Y16:
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY10 | ISC_RLP_CFG_LSH;
+		fallthrough;
+	case V4L2_PIX_FMT_Y10:
+		isc->try_config.rlp_cfg_mode |= ISC_RLP_CFG_MODE_DATY10;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		isc->try_config.bpp = 16;
+		isc->try_config.bpp_v4l2 = 16;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (direct_dump) {
+		isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8;
+		isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
+		isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+		return 0;
+	}
+
+	return 0;
+}
+
+/*
+ * Configuring pipeline modules, depending on which format the ISC outputs
+ * and considering which format it has as input from the sensor.
+ */
+static int isc_try_configure_pipeline(struct isc_device *isc)
+{
+	switch (isc->try_config.fourcc) {
+	case V4L2_PIX_FMT_RGB565:
+	case V4L2_PIX_FMT_ARGB555:
+	case V4L2_PIX_FMT_ARGB444:
+	case V4L2_PIX_FMT_ABGR32:
+	case V4L2_PIX_FMT_XBGR32:
+		/* if sensor format is RAW, we convert inside ISC */
+		if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+			isc->try_config.bits_pipeline = CFA_ENABLE |
+				WB_ENABLE | GAM_ENABLES | DPC_BLCENABLE |
+				CC_ENABLE;
+		} else {
+			isc->try_config.bits_pipeline = 0x0;
+		}
+		break;
+	case V4L2_PIX_FMT_YUV420:
+		/* if sensor format is RAW, we convert inside ISC */
+		if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+			isc->try_config.bits_pipeline = CFA_ENABLE |
+				CSC_ENABLE | GAM_ENABLES | WB_ENABLE |
+				SUB420_ENABLE | SUB422_ENABLE | CBC_ENABLE |
+				DPC_BLCENABLE;
+		} else {
+			isc->try_config.bits_pipeline = 0x0;
+		}
+		break;
+	case V4L2_PIX_FMT_YUV422P:
+		/* if sensor format is RAW, we convert inside ISC */
+		if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+			isc->try_config.bits_pipeline = CFA_ENABLE |
+				CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
+				SUB422_ENABLE | CBC_ENABLE | DPC_BLCENABLE;
+		} else {
+			isc->try_config.bits_pipeline = 0x0;
+		}
+		break;
+	case V4L2_PIX_FMT_YUYV:
+	case V4L2_PIX_FMT_UYVY:
+	case V4L2_PIX_FMT_VYUY:
+		/* if sensor format is RAW, we convert inside ISC */
+		if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+			isc->try_config.bits_pipeline = CFA_ENABLE |
+				CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
+				SUB422_ENABLE | CBC_ENABLE | DPC_BLCENABLE;
+		} else {
+			isc->try_config.bits_pipeline = 0x0;
+		}
+		break;
+	case V4L2_PIX_FMT_GREY:
+	case V4L2_PIX_FMT_Y16:
+		/* if sensor format is RAW, we convert inside ISC */
+		if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+			isc->try_config.bits_pipeline = CFA_ENABLE |
+				CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
+				CBC_ENABLE | DPC_BLCENABLE;
+		} else {
+			isc->try_config.bits_pipeline = 0x0;
+		}
+		break;
+	default:
+		if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code))
+			isc->try_config.bits_pipeline = WB_ENABLE | DPC_BLCENABLE;
+		else
+			isc->try_config.bits_pipeline = 0x0;
+	}
+
+	/* Tune the pipeline to product specific */
+	isc->adapt_pipeline(isc);
+
+	return 0;
+}
+
+static void isc_try_fse(struct isc_device *isc,
+			struct v4l2_subdev_state *sd_state)
+{
+	struct v4l2_subdev_frame_size_enum fse = {
+		.which = V4L2_SUBDEV_FORMAT_TRY,
+	};
+	int ret;
+
+	/*
+	 * If we do not know yet which format the subdev is using, we cannot
+	 * do anything.
+	 */
+	if (!isc->try_config.sd_format)
+		return;
+
+	fse.code = isc->try_config.sd_format->mbus_code;
+
+	ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size,
+			       sd_state, &fse);
+	/*
+	 * Attempt to obtain format size from subdev. If not available,
+	 * just use the maximum ISC can receive.
+	 */
+	if (ret) {
+		sd_state->pads->try_crop.width = isc->max_width;
+		sd_state->pads->try_crop.height = isc->max_height;
+	} else {
+		sd_state->pads->try_crop.width = fse.max_width;
+		sd_state->pads->try_crop.height = fse.max_height;
+	}
+}
+
+static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
+			u32 *code)
+{
+	int i;
+	struct isc_format *sd_fmt = NULL, *direct_fmt = NULL;
+	struct v4l2_pix_format *pixfmt = &f->fmt.pix;
+	struct v4l2_subdev_pad_config pad_cfg = {};
+	struct v4l2_subdev_state pad_state = {
+		.pads = &pad_cfg,
+	};
+	struct v4l2_subdev_format format = {
+		.which = V4L2_SUBDEV_FORMAT_TRY,
+	};
+	u32 mbus_code;
+	int ret;
+	bool rlp_dma_direct_dump = false;
+
+	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	/* Step 1: find a RAW format that is supported */
+	for (i = 0; i < isc->num_user_formats; i++) {
+		if (ISC_IS_FORMAT_RAW(isc->user_formats[i]->mbus_code)) {
+			sd_fmt = isc->user_formats[i];
+			break;
+		}
+	}
+	/* Step 2: We can continue with this RAW format, or we can look
+	 * for better: maybe sensor supports directly what we need.
+	 */
+	direct_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat);
+
+	/* Step 3: We have both. We decide given the module parameter which
+	 * one to use.
+	 */
+	if (direct_fmt && sd_fmt && sensor_preferred)
+		sd_fmt = direct_fmt;
+
+	/* Step 4: we do not have RAW but we have a direct format. Use it. */
+	if (direct_fmt && !sd_fmt)
+		sd_fmt = direct_fmt;
+
+	/* Step 5: if we are using a direct format, we need to package
+	 * everything as 8 bit data and just dump it
+	 */
+	if (sd_fmt == direct_fmt)
+		rlp_dma_direct_dump = true;
+
+	/* Step 6: We have no format. This can happen if the userspace
+	 * requests some weird/invalid format.
+	 * In this case, default to whatever we have
+	 */
+	if (!sd_fmt && !direct_fmt) {
+		sd_fmt = isc->user_formats[isc->num_user_formats - 1];
+		v4l2_dbg(1, debug, &isc->v4l2_dev,
+			 "Sensor not supporting %.4s, using %.4s\n",
+			 (char *)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc);
+	}
+
+	if (!sd_fmt) {
+		ret = -EINVAL;
+		goto isc_try_fmt_err;
+	}
+
+	/* Step 7: Print out what we decided for debugging */
+	v4l2_dbg(1, debug, &isc->v4l2_dev,
+		 "Preferring to have sensor using format %.4s\n",
+		 (char *)&sd_fmt->fourcc);
+
+	/* Step 8: at this moment we decided which format the subdev will use */
+	isc->try_config.sd_format = sd_fmt;
+
+	/* Limit to Atmel ISC hardware capabilities */
+	if (pixfmt->width > isc->max_width)
+		pixfmt->width = isc->max_width;
+	if (pixfmt->height > isc->max_height)
+		pixfmt->height = isc->max_height;
+
+	/*
+	 * The mbus format is the one the subdev outputs.
+	 * The pixels will be transferred in this format Sensor -> ISC
+	 */
+	mbus_code = sd_fmt->mbus_code;
+
+	/*
+	 * Validate formats. If the required format is not OK, default to raw.
+	 */
+
+	isc->try_config.fourcc = pixfmt->pixelformat;
+
+	if (isc_try_validate_formats(isc)) {
+		pixfmt->pixelformat = isc->try_config.fourcc = sd_fmt->fourcc;
+		/* Re-try to validate the new format */
+		ret = isc_try_validate_formats(isc);
+		if (ret)
+			goto isc_try_fmt_err;
+	}
+
+	ret = isc_try_configure_rlp_dma(isc, rlp_dma_direct_dump);
+	if (ret)
+		goto isc_try_fmt_err;
+
+	ret = isc_try_configure_pipeline(isc);
+	if (ret)
+		goto isc_try_fmt_err;
+
+	/* Obtain frame sizes if possible to have crop requirements ready */
+	isc_try_fse(isc, &pad_state);
+
+	v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code);
+	ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt,
+			       &pad_state, &format);
+	if (ret < 0)
+		goto isc_try_fmt_subdev_err;
+
+	v4l2_fill_pix_format(pixfmt, &format.format);
+
+	/* Limit to Atmel ISC hardware capabilities */
+	if (pixfmt->width > isc->max_width)
+		pixfmt->width = isc->max_width;
+	if (pixfmt->height > isc->max_height)
+		pixfmt->height = isc->max_height;
+
+	pixfmt->field = V4L2_FIELD_NONE;
+	pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp_v4l2) >> 3;
+	pixfmt->sizeimage = ((pixfmt->width * isc->try_config.bpp) >> 3) *
+			     pixfmt->height;
+
+	if (code)
+		*code = mbus_code;
+
+	return 0;
+
+isc_try_fmt_err:
+	v4l2_err(&isc->v4l2_dev, "Could not find any possible format for a working pipeline\n");
+isc_try_fmt_subdev_err:
+	memset(&isc->try_config, 0, sizeof(isc->try_config));
+
+	return ret;
+}
+
+static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
+{
+	struct v4l2_subdev_format format = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+	u32 mbus_code = 0;
+	int ret;
+
+	ret = isc_try_fmt(isc, f, &mbus_code);
+	if (ret)
+		return ret;
+
+	v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code);
+	ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
+			       set_fmt, NULL, &format);
+	if (ret < 0)
+		return ret;
+
+	/* Limit to Atmel ISC hardware capabilities */
+	if (f->fmt.pix.width > isc->max_width)
+		f->fmt.pix.width = isc->max_width;
+	if (f->fmt.pix.height > isc->max_height)
+		f->fmt.pix.height = isc->max_height;
+
+	isc->fmt = *f;
+
+	if (isc->try_config.sd_format && isc->config.sd_format &&
+	    isc->try_config.sd_format != isc->config.sd_format) {
+		isc->ctrls.hist_stat = HIST_INIT;
+		isc_reset_awb_ctrls(isc);
+		isc_update_v4l2_ctrls(isc);
+	}
+	/* make the try configuration active */
+	isc->config = isc->try_config;
+
+	v4l2_dbg(1, debug, &isc->v4l2_dev, "New ISC configuration in place\n");
+
+	return 0;
+}
+
+static int isc_s_fmt_vid_cap(struct file *file, void *priv,
+			      struct v4l2_format *f)
+{
+	struct isc_device *isc = video_drvdata(file);
+
+	if (vb2_is_busy(&isc->vb2_vidq))
+		return -EBUSY;
+
+	return isc_set_fmt(isc, f);
+}
+
+static int isc_try_fmt_vid_cap(struct file *file, void *priv,
+				struct v4l2_format *f)
+{
+	struct isc_device *isc = video_drvdata(file);
+
+	return isc_try_fmt(isc, f, NULL);
+}
+
+static int isc_enum_input(struct file *file, void *priv,
+			   struct v4l2_input *inp)
+{
+	if (inp->index != 0)
+		return -EINVAL;
+
+	inp->type = V4L2_INPUT_TYPE_CAMERA;
+	inp->std = 0;
+	strscpy(inp->name, "Camera", sizeof(inp->name));
+
+	return 0;
+}
+
+static int isc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	*i = 0;
+
+	return 0;
+}
+
+static int isc_s_input(struct file *file, void *priv, unsigned int i)
+{
+	if (i > 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
+{
+	struct isc_device *isc = video_drvdata(file);
+
+	return v4l2_g_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
+}
+
+static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
+{
+	struct isc_device *isc = video_drvdata(file);
+
+	return v4l2_s_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
+}
+
+static int isc_enum_framesizes(struct file *file, void *fh,
+			       struct v4l2_frmsizeenum *fsize)
+{
+	struct isc_device *isc = video_drvdata(file);
+	int ret = -EINVAL;
+	int i;
+
+	if (fsize->index)
+		return -EINVAL;
+
+	for (i = 0; i < isc->num_user_formats; i++)
+		if (isc->user_formats[i]->fourcc == fsize->pixel_format)
+			ret = 0;
+
+	for (i = 0; i < isc->controller_formats_size; i++)
+		if (isc->controller_formats[i].fourcc == fsize->pixel_format)
+			ret = 0;
+
+	if (ret)
+		return ret;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
+
+	fsize->stepwise.min_width = 16;
+	fsize->stepwise.max_width = isc->max_width;
+	fsize->stepwise.min_height = 16;
+	fsize->stepwise.max_height = isc->max_height;
+	fsize->stepwise.step_width = 1;
+	fsize->stepwise.step_height = 1;
+
+	return 0;
+}
+
+static const struct v4l2_ioctl_ops isc_ioctl_ops = {
+	.vidioc_querycap		= isc_querycap,
+	.vidioc_enum_fmt_vid_cap	= isc_enum_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap		= isc_g_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap		= isc_s_fmt_vid_cap,
+	.vidioc_try_fmt_vid_cap		= isc_try_fmt_vid_cap,
+
+	.vidioc_enum_input		= isc_enum_input,
+	.vidioc_g_input			= isc_g_input,
+	.vidioc_s_input			= isc_s_input,
+
+	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
+	.vidioc_querybuf		= vb2_ioctl_querybuf,
+	.vidioc_qbuf			= vb2_ioctl_qbuf,
+	.vidioc_expbuf			= vb2_ioctl_expbuf,
+	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
+	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
+	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
+	.vidioc_streamon		= vb2_ioctl_streamon,
+	.vidioc_streamoff		= vb2_ioctl_streamoff,
+
+	.vidioc_g_parm			= isc_g_parm,
+	.vidioc_s_parm			= isc_s_parm,
+	.vidioc_enum_framesizes		= isc_enum_framesizes,
+
+	.vidioc_log_status		= v4l2_ctrl_log_status,
+	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
+};
+
+static int isc_open(struct file *file)
+{
+	struct isc_device *isc = video_drvdata(file);
+	struct v4l2_subdev *sd = isc->current_subdev->sd;
+	int ret;
+
+	if (mutex_lock_interruptible(&isc->lock))
+		return -ERESTARTSYS;
+
+	ret = v4l2_fh_open(file);
+	if (ret < 0)
+		goto unlock;
+
+	if (!v4l2_fh_is_singular_file(file))
+		goto unlock;
+
+	ret = v4l2_subdev_call(sd, core, s_power, 1);
+	if (ret < 0 && ret != -ENOIOCTLCMD) {
+		v4l2_fh_release(file);
+		goto unlock;
+	}
+
+	ret = isc_set_fmt(isc, &isc->fmt);
+	if (ret) {
+		v4l2_subdev_call(sd, core, s_power, 0);
+		v4l2_fh_release(file);
+	}
+
+unlock:
+	mutex_unlock(&isc->lock);
+	return ret;
+}
+
+static int isc_release(struct file *file)
+{
+	struct isc_device *isc = video_drvdata(file);
+	struct v4l2_subdev *sd = isc->current_subdev->sd;
+	bool fh_singular;
+	int ret;
+
+	mutex_lock(&isc->lock);
+
+	fh_singular = v4l2_fh_is_singular_file(file);
+
+	ret = _vb2_fop_release(file, NULL);
+
+	if (fh_singular)
+		v4l2_subdev_call(sd, core, s_power, 0);
+
+	mutex_unlock(&isc->lock);
+
+	return ret;
+}
+
+static const struct v4l2_file_operations isc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= isc_open,
+	.release	= isc_release,
+	.unlocked_ioctl	= video_ioctl2,
+	.read		= vb2_fop_read,
+	.mmap		= vb2_fop_mmap,
+	.poll		= vb2_fop_poll,
+};
+
+irqreturn_t atmel_isc_interrupt(int irq, void *dev_id)
+{
+	struct isc_device *isc = (struct isc_device *)dev_id;
+	struct regmap *regmap = isc->regmap;
+	u32 isc_intsr, isc_intmask, pending;
+	irqreturn_t ret = IRQ_NONE;
+
+	regmap_read(regmap, ISC_INTSR, &isc_intsr);
+	regmap_read(regmap, ISC_INTMASK, &isc_intmask);
+
+	pending = isc_intsr & isc_intmask;
+
+	if (likely(pending & ISC_INT_DDONE)) {
+		spin_lock(&isc->dma_queue_lock);
+		if (isc->cur_frm) {
+			struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb;
+			struct vb2_buffer *vb = &vbuf->vb2_buf;
+
+			vb->timestamp = ktime_get_ns();
+			vbuf->sequence = isc->sequence++;
+			vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+			isc->cur_frm = NULL;
+		}
+
+		if (!list_empty(&isc->dma_queue) && !isc->stop) {
+			isc->cur_frm = list_first_entry(&isc->dma_queue,
+						     struct isc_buffer, list);
+			list_del(&isc->cur_frm->list);
+
+			isc_start_dma(isc);
+		}
+
+		if (isc->stop)
+			complete(&isc->comp);
+
+		ret = IRQ_HANDLED;
+		spin_unlock(&isc->dma_queue_lock);
+	}
+
+	if (pending & ISC_INT_HISDONE) {
+		schedule_work(&isc->awb_work);
+		ret = IRQ_HANDLED;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(atmel_isc_interrupt);
+
+static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max)
+{
+	struct regmap *regmap = isc->regmap;
+	struct isc_ctrls *ctrls = &isc->ctrls;
+	u32 *hist_count = &ctrls->hist_count[ctrls->hist_id];
+	u32 *hist_entry = &ctrls->hist_entry[0];
+	u32 i;
+
+	*min = 0;
+	*max = HIST_ENTRIES;
+
+	regmap_bulk_read(regmap, ISC_HIS_ENTRY + isc->offsets.his_entry,
+			 hist_entry, HIST_ENTRIES);
+
+	*hist_count = 0;
+	/*
+	 * we deliberately ignore the end of the histogram,
+	 * the most white pixels
+	 */
+	for (i = 1; i < HIST_ENTRIES; i++) {
+		if (*hist_entry && !*min)
+			*min = i;
+		if (*hist_entry)
+			*max = i;
+		*hist_count += i * (*hist_entry++);
+	}
+
+	if (!*min)
+		*min = 1;
+
+	v4l2_dbg(1, debug, &isc->v4l2_dev,
+		 "isc wb: hist_id %u, hist_count %u",
+		 ctrls->hist_id, *hist_count);
+}
+
+static void isc_wb_update(struct isc_ctrls *ctrls)
+{
+	struct isc_device *isc = container_of(ctrls, struct isc_device, ctrls);
+	u32 *hist_count = &ctrls->hist_count[0];
+	u32 c, offset[4];
+	u64 avg = 0;
+	/* We compute two gains, stretch gain and grey world gain */
+	u32 s_gain[4], gw_gain[4];
+
+	/*
+	 * According to Grey World, we need to set gains for R/B to normalize
+	 * them towards the green channel.
+	 * Thus we want to keep Green as fixed and adjust only Red/Blue
+	 * Compute the average of the both green channels first
+	 */
+	avg = (u64)hist_count[ISC_HIS_CFG_MODE_GR] +
+		(u64)hist_count[ISC_HIS_CFG_MODE_GB];
+	avg >>= 1;
+
+	v4l2_dbg(1, debug, &isc->v4l2_dev,
+		 "isc wb: green components average %llu\n", avg);
+
+	/* Green histogram is null, nothing to do */
+	if (!avg)
+		return;
+
+	for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) {
+		/*
+		 * the color offset is the minimum value of the histogram.
+		 * we stretch this color to the full range by substracting
+		 * this value from the color component.
+		 */
+		offset[c] = ctrls->hist_minmax[c][HIST_MIN_INDEX];
+		/*
+		 * The offset is always at least 1. If the offset is 1, we do
+		 * not need to adjust it, so our result must be zero.
+		 * the offset is computed in a histogram on 9 bits (0..512)
+		 * but the offset in register is based on
+		 * 12 bits pipeline (0..4096).
+		 * we need to shift with the 3 bits that the histogram is
+		 * ignoring
+		 */
+		ctrls->offset[c] = (offset[c] - 1) << 3;
+
+		/*
+		 * the offset is then taken and converted to 2's complements,
+		 * and must be negative, as we subtract this value from the
+		 * color components
+		 */
+		ctrls->offset[c] = -ctrls->offset[c];
+
+		/*
+		 * the stretch gain is the total number of histogram bins
+		 * divided by the actual range of color component (Max - Min)
+		 * If we compute gain like this, the actual color component
+		 * will be stretched to the full histogram.
+		 * We need to shift 9 bits for precision, we have 9 bits for
+		 * decimals
+		 */
+		s_gain[c] = (HIST_ENTRIES << 9) /
+			(ctrls->hist_minmax[c][HIST_MAX_INDEX] -
+			ctrls->hist_minmax[c][HIST_MIN_INDEX] + 1);
+
+		/*
+		 * Now we have to compute the gain w.r.t. the average.
+		 * Add/lose gain to the component towards the average.
+		 * If it happens that the component is zero, use the
+		 * fixed point value : 1.0 gain.
+		 */
+		if (hist_count[c])
+			gw_gain[c] = div_u64(avg << 9, hist_count[c]);
+		else
+			gw_gain[c] = 1 << 9;
+
+		v4l2_dbg(1, debug, &isc->v4l2_dev,
+			 "isc wb: component %d, s_gain %u, gw_gain %u\n",
+			 c, s_gain[c], gw_gain[c]);
+		/* multiply both gains and adjust for decimals */
+		ctrls->gain[c] = s_gain[c] * gw_gain[c];
+		ctrls->gain[c] >>= 9;
+
+		/* make sure we are not out of range */
+		ctrls->gain[c] = clamp_val(ctrls->gain[c], 0, GENMASK(12, 0));
+
+		v4l2_dbg(1, debug, &isc->v4l2_dev,
+			 "isc wb: component %d, final gain %u\n",
+			 c, ctrls->gain[c]);
+	}
+}
+
+static void isc_awb_work(struct work_struct *w)
+{
+	struct isc_device *isc =
+		container_of(w, struct isc_device, awb_work);
+	struct regmap *regmap = isc->regmap;
+	struct isc_ctrls *ctrls = &isc->ctrls;
+	u32 hist_id = ctrls->hist_id;
+	u32 baysel;
+	unsigned long flags;
+	u32 min, max;
+	int ret;
+
+	if (ctrls->hist_stat != HIST_ENABLED)
+		return;
+
+	isc_hist_count(isc, &min, &max);
+
+	v4l2_dbg(1, debug, &isc->v4l2_dev,
+		 "isc wb mode %d: hist min %u , max %u\n", hist_id, min, max);
+
+	ctrls->hist_minmax[hist_id][HIST_MIN_INDEX] = min;
+	ctrls->hist_minmax[hist_id][HIST_MAX_INDEX] = max;
+
+	if (hist_id != ISC_HIS_CFG_MODE_B) {
+		hist_id++;
+	} else {
+		isc_wb_update(ctrls);
+		hist_id = ISC_HIS_CFG_MODE_GR;
+	}
+
+	ctrls->hist_id = hist_id;
+	baysel = isc->config.sd_format->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT;
+
+	ret = pm_runtime_resume_and_get(isc->dev);
+	if (ret < 0)
+		return;
+
+	/*
+	 * only update if we have all the required histograms and controls
+	 * if awb has been disabled, we need to reset registers as well.
+	 */
+	if (hist_id == ISC_HIS_CFG_MODE_GR || ctrls->awb == ISC_WB_NONE) {
+		/*
+		 * It may happen that DMA Done IRQ will trigger while we are
+		 * updating white balance registers here.
+		 * In that case, only parts of the controls have been updated.
+		 * We can avoid that by locking the section.
+		 */
+		spin_lock_irqsave(&isc->awb_lock, flags);
+		isc_update_awb_ctrls(isc);
+		spin_unlock_irqrestore(&isc->awb_lock, flags);
+
+		/*
+		 * if we are doing just the one time white balance adjustment,
+		 * we are basically done.
+		 */
+		if (ctrls->awb == ISC_WB_ONETIME) {
+			v4l2_info(&isc->v4l2_dev,
+				  "Completed one time white-balance adjustment.\n");
+			/* update the v4l2 controls values */
+			isc_update_v4l2_ctrls(isc);
+			ctrls->awb = ISC_WB_NONE;
+		}
+	}
+	regmap_write(regmap, ISC_HIS_CFG + isc->offsets.his,
+		     hist_id | baysel | ISC_HIS_CFG_RAR);
+
+	/*
+	 * We have to make sure the streaming has not stopped meanwhile.
+	 * ISC requires a frame to clock the internal profile update.
+	 * To avoid issues, lock the sequence with a mutex
+	 */
+	mutex_lock(&isc->awb_mutex);
+
+	/* streaming is not active anymore */
+	if (isc->stop) {
+		mutex_unlock(&isc->awb_mutex);
+		return;
+	}
+
+	isc_update_profile(isc);
+
+	mutex_unlock(&isc->awb_mutex);
+
+	/* if awb has been disabled, we don't need to start another histogram */
+	if (ctrls->awb)
+		regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
+
+	pm_runtime_put_sync(isc->dev);
+}
+
+static int isc_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct isc_device *isc = container_of(ctrl->handler,
+					     struct isc_device, ctrls.handler);
+	struct isc_ctrls *ctrls = &isc->ctrls;
+
+	if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		ctrls->brightness = ctrl->val & ISC_CBC_BRIGHT_MASK;
+		break;
+	case V4L2_CID_CONTRAST:
+		ctrls->contrast = ctrl->val & ISC_CBC_CONTRAST_MASK;
+		break;
+	case V4L2_CID_GAMMA:
+		ctrls->gamma_index = ctrl->val;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops isc_ctrl_ops = {
+	.s_ctrl	= isc_s_ctrl,
+};
+
+static int isc_s_awb_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct isc_device *isc = container_of(ctrl->handler,
+					     struct isc_device, ctrls.handler);
+	struct isc_ctrls *ctrls = &isc->ctrls;
+
+	if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUTO_WHITE_BALANCE:
+		if (ctrl->val == 1)
+			ctrls->awb = ISC_WB_AUTO;
+		else
+			ctrls->awb = ISC_WB_NONE;
+
+		/* configure the controls with new values from v4l2 */
+		if (ctrl->cluster[ISC_CTRL_R_GAIN]->is_new)
+			ctrls->gain[ISC_HIS_CFG_MODE_R] = isc->r_gain_ctrl->val;
+		if (ctrl->cluster[ISC_CTRL_B_GAIN]->is_new)
+			ctrls->gain[ISC_HIS_CFG_MODE_B] = isc->b_gain_ctrl->val;
+		if (ctrl->cluster[ISC_CTRL_GR_GAIN]->is_new)
+			ctrls->gain[ISC_HIS_CFG_MODE_GR] = isc->gr_gain_ctrl->val;
+		if (ctrl->cluster[ISC_CTRL_GB_GAIN]->is_new)
+			ctrls->gain[ISC_HIS_CFG_MODE_GB] = isc->gb_gain_ctrl->val;
+
+		if (ctrl->cluster[ISC_CTRL_R_OFF]->is_new)
+			ctrls->offset[ISC_HIS_CFG_MODE_R] = isc->r_off_ctrl->val;
+		if (ctrl->cluster[ISC_CTRL_B_OFF]->is_new)
+			ctrls->offset[ISC_HIS_CFG_MODE_B] = isc->b_off_ctrl->val;
+		if (ctrl->cluster[ISC_CTRL_GR_OFF]->is_new)
+			ctrls->offset[ISC_HIS_CFG_MODE_GR] = isc->gr_off_ctrl->val;
+		if (ctrl->cluster[ISC_CTRL_GB_OFF]->is_new)
+			ctrls->offset[ISC_HIS_CFG_MODE_GB] = isc->gb_off_ctrl->val;
+
+		isc_update_awb_ctrls(isc);
+
+		mutex_lock(&isc->awb_mutex);
+		if (vb2_is_streaming(&isc->vb2_vidq)) {
+			/*
+			 * If we are streaming, we can update profile to
+			 * have the new settings in place.
+			 */
+			isc_update_profile(isc);
+		} else {
+			/*
+			 * The auto cluster will activate automatically this
+			 * control. This has to be deactivated when not
+			 * streaming.
+			 */
+			v4l2_ctrl_activate(isc->do_wb_ctrl, false);
+		}
+		mutex_unlock(&isc->awb_mutex);
+
+		/* if we have autowhitebalance on, start histogram procedure */
+		if (ctrls->awb == ISC_WB_AUTO &&
+		    vb2_is_streaming(&isc->vb2_vidq) &&
+		    ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
+			isc_set_histogram(isc, true);
+
+		/*
+		 * for one time whitebalance adjustment, check the button,
+		 * if it's pressed, perform the one time operation.
+		 */
+		if (ctrls->awb == ISC_WB_NONE &&
+		    ctrl->cluster[ISC_CTRL_DO_WB]->is_new &&
+		    !(ctrl->cluster[ISC_CTRL_DO_WB]->flags &
+		    V4L2_CTRL_FLAG_INACTIVE)) {
+			ctrls->awb = ISC_WB_ONETIME;
+			isc_set_histogram(isc, true);
+			v4l2_dbg(1, debug, &isc->v4l2_dev,
+				 "One time white-balance started.\n");
+		}
+		return 0;
+	}
+	return 0;
+}
+
+static int isc_g_volatile_awb_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct isc_device *isc = container_of(ctrl->handler,
+					     struct isc_device, ctrls.handler);
+	struct isc_ctrls *ctrls = &isc->ctrls;
+
+	switch (ctrl->id) {
+	/* being a cluster, this id will be called for every control */
+	case V4L2_CID_AUTO_WHITE_BALANCE:
+		ctrl->cluster[ISC_CTRL_R_GAIN]->val =
+					ctrls->gain[ISC_HIS_CFG_MODE_R];
+		ctrl->cluster[ISC_CTRL_B_GAIN]->val =
+					ctrls->gain[ISC_HIS_CFG_MODE_B];
+		ctrl->cluster[ISC_CTRL_GR_GAIN]->val =
+					ctrls->gain[ISC_HIS_CFG_MODE_GR];
+		ctrl->cluster[ISC_CTRL_GB_GAIN]->val =
+					ctrls->gain[ISC_HIS_CFG_MODE_GB];
+
+		ctrl->cluster[ISC_CTRL_R_OFF]->val =
+			ctrls->offset[ISC_HIS_CFG_MODE_R];
+		ctrl->cluster[ISC_CTRL_B_OFF]->val =
+			ctrls->offset[ISC_HIS_CFG_MODE_B];
+		ctrl->cluster[ISC_CTRL_GR_OFF]->val =
+			ctrls->offset[ISC_HIS_CFG_MODE_GR];
+		ctrl->cluster[ISC_CTRL_GB_OFF]->val =
+			ctrls->offset[ISC_HIS_CFG_MODE_GB];
+		break;
+	}
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops isc_awb_ops = {
+	.s_ctrl = isc_s_awb_ctrl,
+	.g_volatile_ctrl = isc_g_volatile_awb_ctrl,
+};
+
+#define ISC_CTRL_OFF(_name, _id, _name_str) \
+	static const struct v4l2_ctrl_config _name = { \
+		.ops = &isc_awb_ops, \
+		.id = _id, \
+		.name = _name_str, \
+		.type = V4L2_CTRL_TYPE_INTEGER, \
+		.flags = V4L2_CTRL_FLAG_SLIDER, \
+		.min = -4095, \
+		.max = 4095, \
+		.step = 1, \
+		.def = 0, \
+	}
+
+ISC_CTRL_OFF(isc_r_off_ctrl, ISC_CID_R_OFFSET, "Red Component Offset");
+ISC_CTRL_OFF(isc_b_off_ctrl, ISC_CID_B_OFFSET, "Blue Component Offset");
+ISC_CTRL_OFF(isc_gr_off_ctrl, ISC_CID_GR_OFFSET, "Green Red Component Offset");
+ISC_CTRL_OFF(isc_gb_off_ctrl, ISC_CID_GB_OFFSET, "Green Blue Component Offset");
+
+#define ISC_CTRL_GAIN(_name, _id, _name_str) \
+	static const struct v4l2_ctrl_config _name = { \
+		.ops = &isc_awb_ops, \
+		.id = _id, \
+		.name = _name_str, \
+		.type = V4L2_CTRL_TYPE_INTEGER, \
+		.flags = V4L2_CTRL_FLAG_SLIDER, \
+		.min = 0, \
+		.max = 8191, \
+		.step = 1, \
+		.def = 512, \
+	}
+
+ISC_CTRL_GAIN(isc_r_gain_ctrl, ISC_CID_R_GAIN, "Red Component Gain");
+ISC_CTRL_GAIN(isc_b_gain_ctrl, ISC_CID_B_GAIN, "Blue Component Gain");
+ISC_CTRL_GAIN(isc_gr_gain_ctrl, ISC_CID_GR_GAIN, "Green Red Component Gain");
+ISC_CTRL_GAIN(isc_gb_gain_ctrl, ISC_CID_GB_GAIN, "Green Blue Component Gain");
+
+static int isc_ctrl_init(struct isc_device *isc)
+{
+	const struct v4l2_ctrl_ops *ops = &isc_ctrl_ops;
+	struct isc_ctrls *ctrls = &isc->ctrls;
+	struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+	int ret;
+
+	ctrls->hist_stat = HIST_INIT;
+	isc_reset_awb_ctrls(isc);
+
+	ret = v4l2_ctrl_handler_init(hdl, 13);
+	if (ret < 0)
+		return ret;
+
+	/* Initialize product specific controls. For example, contrast */
+	isc->config_ctrls(isc, ops);
+
+	ctrls->brightness = 0;
+
+	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0);
+	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, isc->gamma_max, 1,
+			  isc->gamma_max);
+	isc->awb_ctrl = v4l2_ctrl_new_std(hdl, &isc_awb_ops,
+					  V4L2_CID_AUTO_WHITE_BALANCE,
+					  0, 1, 1, 1);
+
+	/* do_white_balance is a button, so min,max,step,default are ignored */
+	isc->do_wb_ctrl = v4l2_ctrl_new_std(hdl, &isc_awb_ops,
+					    V4L2_CID_DO_WHITE_BALANCE,
+					    0, 0, 0, 0);
+
+	if (!isc->do_wb_ctrl) {
+		ret = hdl->error;
+		v4l2_ctrl_handler_free(hdl);
+		return ret;
+	}
+
+	v4l2_ctrl_activate(isc->do_wb_ctrl, false);
+
+	isc->r_gain_ctrl = v4l2_ctrl_new_custom(hdl, &isc_r_gain_ctrl, NULL);
+	isc->b_gain_ctrl = v4l2_ctrl_new_custom(hdl, &isc_b_gain_ctrl, NULL);
+	isc->gr_gain_ctrl = v4l2_ctrl_new_custom(hdl, &isc_gr_gain_ctrl, NULL);
+	isc->gb_gain_ctrl = v4l2_ctrl_new_custom(hdl, &isc_gb_gain_ctrl, NULL);
+	isc->r_off_ctrl = v4l2_ctrl_new_custom(hdl, &isc_r_off_ctrl, NULL);
+	isc->b_off_ctrl = v4l2_ctrl_new_custom(hdl, &isc_b_off_ctrl, NULL);
+	isc->gr_off_ctrl = v4l2_ctrl_new_custom(hdl, &isc_gr_off_ctrl, NULL);
+	isc->gb_off_ctrl = v4l2_ctrl_new_custom(hdl, &isc_gb_off_ctrl, NULL);
+
+	/*
+	 * The cluster is in auto mode with autowhitebalance enabled
+	 * and manual mode otherwise.
+	 */
+	v4l2_ctrl_auto_cluster(10, &isc->awb_ctrl, 0, true);
+
+	v4l2_ctrl_handler_setup(hdl);
+
+	return 0;
+}
+
+static int isc_async_bound(struct v4l2_async_notifier *notifier,
+			    struct v4l2_subdev *subdev,
+			    struct v4l2_async_connection *asd)
+{
+	struct isc_device *isc = container_of(notifier->v4l2_dev,
+					      struct isc_device, v4l2_dev);
+	struct isc_subdev_entity *subdev_entity =
+		container_of(notifier, struct isc_subdev_entity, notifier);
+
+	if (video_is_registered(&isc->video_dev)) {
+		v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n");
+		return -EBUSY;
+	}
+
+	subdev_entity->sd = subdev;
+
+	return 0;
+}
+
+static void isc_async_unbind(struct v4l2_async_notifier *notifier,
+			      struct v4l2_subdev *subdev,
+			      struct v4l2_async_connection *asd)
+{
+	struct isc_device *isc = container_of(notifier->v4l2_dev,
+					      struct isc_device, v4l2_dev);
+	mutex_destroy(&isc->awb_mutex);
+	cancel_work_sync(&isc->awb_work);
+	video_unregister_device(&isc->video_dev);
+	v4l2_ctrl_handler_free(&isc->ctrls.handler);
+}
+
+static struct isc_format *find_format_by_code(struct isc_device *isc,
+					      unsigned int code, int *index)
+{
+	struct isc_format *fmt = &isc->formats_list[0];
+	unsigned int i;
+
+	for (i = 0; i < isc->formats_list_size; i++) {
+		if (fmt->mbus_code == code) {
+			*index = i;
+			return fmt;
+		}
+
+		fmt++;
+	}
+
+	return NULL;
+}
+
+static int isc_formats_init(struct isc_device *isc)
+{
+	struct isc_format *fmt;
+	struct v4l2_subdev *subdev = isc->current_subdev->sd;
+	unsigned int num_fmts, i, j;
+	u32 list_size = isc->formats_list_size;
+	struct v4l2_subdev_mbus_code_enum mbus_code = {
+		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+	};
+
+	num_fmts = 0;
+	while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
+	       NULL, &mbus_code)) {
+		mbus_code.index++;
+
+		fmt = find_format_by_code(isc, mbus_code.code, &i);
+		if (!fmt) {
+			v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n",
+				  mbus_code.code);
+			continue;
+		}
+
+		fmt->sd_support = true;
+		num_fmts++;
+	}
+
+	if (!num_fmts)
+		return -ENXIO;
+
+	isc->num_user_formats = num_fmts;
+	isc->user_formats = devm_kcalloc(isc->dev,
+					 num_fmts, sizeof(*isc->user_formats),
+					 GFP_KERNEL);
+	if (!isc->user_formats)
+		return -ENOMEM;
+
+	fmt = &isc->formats_list[0];
+	for (i = 0, j = 0; i < list_size; i++) {
+		if (fmt->sd_support)
+			isc->user_formats[j++] = fmt;
+		fmt++;
+	}
+
+	return 0;
+}
+
+static int isc_set_default_fmt(struct isc_device *isc)
+{
+	struct v4l2_format f = {
+		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+		.fmt.pix = {
+			.width		= VGA_WIDTH,
+			.height		= VGA_HEIGHT,
+			.field		= V4L2_FIELD_NONE,
+			.pixelformat	= isc->user_formats[0]->fourcc,
+		},
+	};
+	int ret;
+
+	ret = isc_try_fmt(isc, &f, NULL);
+	if (ret)
+		return ret;
+
+	isc->fmt = f;
+	return 0;
+}
+
+static int isc_async_complete(struct v4l2_async_notifier *notifier)
+{
+	struct isc_device *isc = container_of(notifier->v4l2_dev,
+					      struct isc_device, v4l2_dev);
+	struct video_device *vdev = &isc->video_dev;
+	struct vb2_queue *q = &isc->vb2_vidq;
+	int ret = 0;
+
+	INIT_WORK(&isc->awb_work, isc_awb_work);
+
+	ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev);
+	if (ret < 0) {
+		v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n");
+		return ret;
+	}
+
+	isc->current_subdev = container_of(notifier,
+					   struct isc_subdev_entity, notifier);
+	mutex_init(&isc->lock);
+	mutex_init(&isc->awb_mutex);
+
+	init_completion(&isc->comp);
+
+	/* Initialize videobuf2 queue */
+	q->type			= V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	q->io_modes		= VB2_MMAP | VB2_DMABUF | VB2_READ;
+	q->drv_priv		= isc;
+	q->buf_struct_size	= sizeof(struct isc_buffer);
+	q->ops			= &isc_vb2_ops;
+	q->mem_ops		= &vb2_dma_contig_memops;
+	q->timestamp_flags	= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	q->lock			= &isc->lock;
+	q->min_buffers_needed	= 1;
+	q->dev			= isc->dev;
+
+	ret = vb2_queue_init(q);
+	if (ret < 0) {
+		v4l2_err(&isc->v4l2_dev,
+			 "vb2_queue_init() failed: %d\n", ret);
+		goto isc_async_complete_err;
+	}
+
+	/* Init video dma queues */
+	INIT_LIST_HEAD(&isc->dma_queue);
+	spin_lock_init(&isc->dma_queue_lock);
+	spin_lock_init(&isc->awb_lock);
+
+	ret = isc_formats_init(isc);
+	if (ret < 0) {
+		v4l2_err(&isc->v4l2_dev,
+			 "Init format failed: %d\n", ret);
+		goto isc_async_complete_err;
+	}
+
+	ret = isc_set_default_fmt(isc);
+	if (ret) {
+		v4l2_err(&isc->v4l2_dev, "Could not set default format\n");
+		goto isc_async_complete_err;
+	}
+
+	ret = isc_ctrl_init(isc);
+	if (ret) {
+		v4l2_err(&isc->v4l2_dev, "Init isc ctrols failed: %d\n", ret);
+		goto isc_async_complete_err;
+	}
+
+	/* Register video device */
+	strscpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name));
+	vdev->release		= video_device_release_empty;
+	vdev->fops		= &isc_fops;
+	vdev->ioctl_ops		= &isc_ioctl_ops;
+	vdev->v4l2_dev		= &isc->v4l2_dev;
+	vdev->vfl_dir		= VFL_DIR_RX;
+	vdev->queue		= q;
+	vdev->lock		= &isc->lock;
+	vdev->ctrl_handler	= &isc->ctrls.handler;
+	vdev->device_caps	= V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
+	video_set_drvdata(vdev, isc);
+
+	ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
+	if (ret < 0) {
+		v4l2_err(&isc->v4l2_dev,
+			 "video_register_device failed: %d\n", ret);
+		goto isc_async_complete_err;
+	}
+
+	return 0;
+
+isc_async_complete_err:
+	mutex_destroy(&isc->awb_mutex);
+	mutex_destroy(&isc->lock);
+	return ret;
+}
+
+const struct v4l2_async_notifier_operations atmel_isc_async_ops = {
+	.bound = isc_async_bound,
+	.unbind = isc_async_unbind,
+	.complete = isc_async_complete,
+};
+EXPORT_SYMBOL_GPL(atmel_isc_async_ops);
+
+void atmel_isc_subdev_cleanup(struct isc_device *isc)
+{
+	struct isc_subdev_entity *subdev_entity;
+
+	list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
+		v4l2_async_nf_unregister(&subdev_entity->notifier);
+		v4l2_async_nf_cleanup(&subdev_entity->notifier);
+	}
+
+	INIT_LIST_HEAD(&isc->subdev_entities);
+}
+EXPORT_SYMBOL_GPL(atmel_isc_subdev_cleanup);
+
+int atmel_isc_pipeline_init(struct isc_device *isc)
+{
+	struct device *dev = isc->dev;
+	struct regmap *regmap = isc->regmap;
+	struct regmap_field *regs;
+	unsigned int i;
+
+	/*
+	 * DPCEN-->GDCEN-->BLCEN-->WB-->CFA-->CC-->
+	 * GAM-->VHXS-->CSC-->CBC-->SUB422-->SUB420
+	 */
+	const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = {
+		REG_FIELD(ISC_DPC_CTRL, 0, 0),
+		REG_FIELD(ISC_DPC_CTRL, 1, 1),
+		REG_FIELD(ISC_DPC_CTRL, 2, 2),
+		REG_FIELD(ISC_WB_CTRL, 0, 0),
+		REG_FIELD(ISC_CFA_CTRL, 0, 0),
+		REG_FIELD(ISC_CC_CTRL, 0, 0),
+		REG_FIELD(ISC_GAM_CTRL, 0, 0),
+		REG_FIELD(ISC_GAM_CTRL, 1, 1),
+		REG_FIELD(ISC_GAM_CTRL, 2, 2),
+		REG_FIELD(ISC_GAM_CTRL, 3, 3),
+		REG_FIELD(ISC_VHXS_CTRL, 0, 0),
+		REG_FIELD(ISC_CSC_CTRL + isc->offsets.csc, 0, 0),
+		REG_FIELD(ISC_CBC_CTRL + isc->offsets.cbc, 0, 0),
+		REG_FIELD(ISC_SUB422_CTRL + isc->offsets.sub422, 0, 0),
+		REG_FIELD(ISC_SUB420_CTRL + isc->offsets.sub420, 0, 0),
+	};
+
+	for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
+		regs = devm_regmap_field_alloc(dev, regmap, regfields[i]);
+		if (IS_ERR(regs))
+			return PTR_ERR(regs);
+
+		isc->pipeline[i] =  regs;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(atmel_isc_pipeline_init);
+
+/* regmap configuration */
+#define ATMEL_ISC_REG_MAX    0xd5c
+const struct regmap_config atmel_isc_regmap_config = {
+	.reg_bits       = 32,
+	.reg_stride     = 4,
+	.val_bits       = 32,
+	.max_register	= ATMEL_ISC_REG_MAX,
+};
+EXPORT_SYMBOL_GPL(atmel_isc_regmap_config);
+
+MODULE_AUTHOR("Songjun Wu");
+MODULE_AUTHOR("Eugen Hristev");
+MODULE_DESCRIPTION("Atmel ISC common code base");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/media/deprecated/atmel/atmel-isc-clk.c b/drivers/staging/media/deprecated/atmel/atmel-isc-clk.c
new file mode 100644
index 0000000000..d442b5f4c9
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/atmel-isc-clk.c
@@ -0,0 +1,311 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Microchip Image Sensor Controller (ISC) common clock driver setup
+ *
+ * Copyright (C) 2016 Microchip Technology, Inc.
+ *
+ * Author: Songjun Wu
+ * Author: Eugen Hristev <eugen.hristev@microchip.com>
+ *
+ */
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include "atmel-isc-regs.h"
+#include "atmel-isc.h"
+
+static int isc_wait_clk_stable(struct clk_hw *hw)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+	struct regmap *regmap = isc_clk->regmap;
+	unsigned long timeout = jiffies + usecs_to_jiffies(1000);
+	unsigned int status;
+
+	while (time_before(jiffies, timeout)) {
+		regmap_read(regmap, ISC_CLKSR, &status);
+		if (!(status & ISC_CLKSR_SIP))
+			return 0;
+
+		usleep_range(10, 250);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int isc_clk_prepare(struct clk_hw *hw)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+	int ret;
+
+	ret = pm_runtime_resume_and_get(isc_clk->dev);
+	if (ret < 0)
+		return ret;
+
+	return isc_wait_clk_stable(hw);
+}
+
+static void isc_clk_unprepare(struct clk_hw *hw)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+
+	isc_wait_clk_stable(hw);
+
+	pm_runtime_put_sync(isc_clk->dev);
+}
+
+static int isc_clk_enable(struct clk_hw *hw)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+	u32 id = isc_clk->id;
+	struct regmap *regmap = isc_clk->regmap;
+	unsigned long flags;
+	unsigned int status;
+
+	dev_dbg(isc_clk->dev, "ISC CLK: %s, id = %d, div = %d, parent id = %d\n",
+		__func__, id, isc_clk->div, isc_clk->parent_id);
+
+	spin_lock_irqsave(&isc_clk->lock, flags);
+	regmap_update_bits(regmap, ISC_CLKCFG,
+			   ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id),
+			   (isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) |
+			   (isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id)));
+
+	regmap_write(regmap, ISC_CLKEN, ISC_CLK(id));
+	spin_unlock_irqrestore(&isc_clk->lock, flags);
+
+	regmap_read(regmap, ISC_CLKSR, &status);
+	if (status & ISC_CLK(id))
+		return 0;
+	else
+		return -EINVAL;
+}
+
+static void isc_clk_disable(struct clk_hw *hw)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+	u32 id = isc_clk->id;
+	unsigned long flags;
+
+	spin_lock_irqsave(&isc_clk->lock, flags);
+	regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id));
+	spin_unlock_irqrestore(&isc_clk->lock, flags);
+}
+
+static int isc_clk_is_enabled(struct clk_hw *hw)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+	u32 status;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(isc_clk->dev);
+	if (ret < 0)
+		return 0;
+
+	regmap_read(isc_clk->regmap, ISC_CLKSR, &status);
+
+	pm_runtime_put_sync(isc_clk->dev);
+
+	return status & ISC_CLK(isc_clk->id) ? 1 : 0;
+}
+
+static unsigned long
+isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+
+	return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1);
+}
+
+static int isc_clk_determine_rate(struct clk_hw *hw,
+				  struct clk_rate_request *req)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+	long best_rate = -EINVAL;
+	int best_diff = -1;
+	unsigned int i, div;
+
+	for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
+		struct clk_hw *parent;
+		unsigned long parent_rate;
+
+		parent = clk_hw_get_parent_by_index(hw, i);
+		if (!parent)
+			continue;
+
+		parent_rate = clk_hw_get_rate(parent);
+		if (!parent_rate)
+			continue;
+
+		for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) {
+			unsigned long rate;
+			int diff;
+
+			rate = DIV_ROUND_CLOSEST(parent_rate, div);
+			diff = abs(req->rate - rate);
+
+			if (best_diff < 0 || best_diff > diff) {
+				best_rate = rate;
+				best_diff = diff;
+				req->best_parent_rate = parent_rate;
+				req->best_parent_hw = parent;
+			}
+
+			if (!best_diff || rate < req->rate)
+				break;
+		}
+
+		if (!best_diff)
+			break;
+	}
+
+	dev_dbg(isc_clk->dev,
+		"ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n",
+		__func__, best_rate,
+		__clk_get_name((req->best_parent_hw)->clk),
+		req->best_parent_rate);
+
+	if (best_rate < 0)
+		return best_rate;
+
+	req->rate = best_rate;
+
+	return 0;
+}
+
+static int isc_clk_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+
+	if (index >= clk_hw_get_num_parents(hw))
+		return -EINVAL;
+
+	isc_clk->parent_id = index;
+
+	return 0;
+}
+
+static u8 isc_clk_get_parent(struct clk_hw *hw)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+
+	return isc_clk->parent_id;
+}
+
+static int isc_clk_set_rate(struct clk_hw *hw,
+			    unsigned long rate,
+			    unsigned long parent_rate)
+{
+	struct isc_clk *isc_clk = to_isc_clk(hw);
+	u32 div;
+
+	if (!rate)
+		return -EINVAL;
+
+	div = DIV_ROUND_CLOSEST(parent_rate, rate);
+	if (div > (ISC_CLK_MAX_DIV + 1) || !div)
+		return -EINVAL;
+
+	isc_clk->div = div - 1;
+
+	return 0;
+}
+
+static const struct clk_ops isc_clk_ops = {
+	.prepare	= isc_clk_prepare,
+	.unprepare	= isc_clk_unprepare,
+	.enable		= isc_clk_enable,
+	.disable	= isc_clk_disable,
+	.is_enabled	= isc_clk_is_enabled,
+	.recalc_rate	= isc_clk_recalc_rate,
+	.determine_rate	= isc_clk_determine_rate,
+	.set_parent	= isc_clk_set_parent,
+	.get_parent	= isc_clk_get_parent,
+	.set_rate	= isc_clk_set_rate,
+};
+
+static int isc_clk_register(struct isc_device *isc, unsigned int id)
+{
+	struct regmap *regmap = isc->regmap;
+	struct device_node *np = isc->dev->of_node;
+	struct isc_clk *isc_clk;
+	struct clk_init_data init;
+	const char *clk_name = np->name;
+	const char *parent_names[3];
+	int num_parents;
+
+	if (id == ISC_ISPCK && !isc->ispck_required)
+		return 0;
+
+	num_parents = of_clk_get_parent_count(np);
+	if (num_parents < 1 || num_parents > 3)
+		return -EINVAL;
+
+	if (num_parents > 2 && id == ISC_ISPCK)
+		num_parents = 2;
+
+	of_clk_parent_fill(np, parent_names, num_parents);
+
+	if (id == ISC_MCK)
+		of_property_read_string(np, "clock-output-names", &clk_name);
+	else
+		clk_name = "isc-ispck";
+
+	init.parent_names	= parent_names;
+	init.num_parents	= num_parents;
+	init.name		= clk_name;
+	init.ops		= &isc_clk_ops;
+	init.flags		= CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
+
+	isc_clk = &isc->isc_clks[id];
+	isc_clk->hw.init	= &init;
+	isc_clk->regmap		= regmap;
+	isc_clk->id		= id;
+	isc_clk->dev		= isc->dev;
+	spin_lock_init(&isc_clk->lock);
+
+	isc_clk->clk = clk_register(isc->dev, &isc_clk->hw);
+	if (IS_ERR(isc_clk->clk)) {
+		dev_err(isc->dev, "%s: clock register fail\n", clk_name);
+		return PTR_ERR(isc_clk->clk);
+	} else if (id == ISC_MCK) {
+		of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk);
+	}
+
+	return 0;
+}
+
+int atmel_isc_clk_init(struct isc_device *isc)
+{
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++)
+		isc->isc_clks[i].clk = ERR_PTR(-EINVAL);
+
+	for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
+		ret = isc_clk_register(isc, i);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(atmel_isc_clk_init);
+
+void atmel_isc_clk_cleanup(struct isc_device *isc)
+{
+	unsigned int i;
+
+	of_clk_del_provider(isc->dev->of_node);
+
+	for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
+		struct isc_clk *isc_clk = &isc->isc_clks[i];
+
+		if (!IS_ERR(isc_clk->clk))
+			clk_unregister(isc_clk->clk);
+	}
+}
+EXPORT_SYMBOL_GPL(atmel_isc_clk_cleanup);
diff --git a/drivers/staging/media/deprecated/atmel/atmel-isc-regs.h b/drivers/staging/media/deprecated/atmel/atmel-isc-regs.h
new file mode 100644
index 0000000000..d06b72228d
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/atmel-isc-regs.h
@@ -0,0 +1,413 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ATMEL_ISC_REGS_H
+#define __ATMEL_ISC_REGS_H
+
+#include <linux/bitops.h>
+
+/* ISC Control Enable Register 0 */
+#define ISC_CTRLEN      0x00000000
+
+/* ISC Control Disable Register 0 */
+#define ISC_CTRLDIS     0x00000004
+
+/* ISC Control Status Register 0 */
+#define ISC_CTRLSR      0x00000008
+
+#define ISC_CTRL_CAPTURE	BIT(0)
+#define ISC_CTRL_UPPRO		BIT(1)
+#define ISC_CTRL_HISREQ		BIT(2)
+#define ISC_CTRL_HISCLR		BIT(3)
+
+/* ISC Parallel Front End Configuration 0 Register */
+#define ISC_PFE_CFG0    0x0000000c
+
+#define ISC_PFE_CFG0_HPOL_LOW   BIT(0)
+#define ISC_PFE_CFG0_VPOL_LOW   BIT(1)
+#define ISC_PFE_CFG0_PPOL_LOW   BIT(2)
+#define ISC_PFE_CFG0_CCIR656    BIT(9)
+#define ISC_PFE_CFG0_CCIR_CRC   BIT(10)
+#define ISC_PFE_CFG0_MIPI	BIT(14)
+
+#define ISC_PFE_CFG0_MODE_PROGRESSIVE   (0x0 << 4)
+#define ISC_PFE_CFG0_MODE_MASK          GENMASK(6, 4)
+
+#define ISC_PFE_CFG0_BPS_EIGHT  (0x4 << 28)
+#define ISC_PFG_CFG0_BPS_NINE   (0x3 << 28)
+#define ISC_PFG_CFG0_BPS_TEN    (0x2 << 28)
+#define ISC_PFG_CFG0_BPS_ELEVEN (0x1 << 28)
+#define ISC_PFG_CFG0_BPS_TWELVE (0x0 << 28)
+#define ISC_PFE_CFG0_BPS_MASK   GENMASK(30, 28)
+
+#define ISC_PFE_CFG0_COLEN	BIT(12)
+#define ISC_PFE_CFG0_ROWEN	BIT(13)
+
+/* ISC Parallel Front End Configuration 1 Register */
+#define ISC_PFE_CFG1    0x00000010
+
+#define ISC_PFE_CFG1_COLMIN(v)		((v))
+#define ISC_PFE_CFG1_COLMIN_MASK	GENMASK(15, 0)
+#define ISC_PFE_CFG1_COLMAX(v)		((v) << 16)
+#define ISC_PFE_CFG1_COLMAX_MASK	GENMASK(31, 16)
+
+/* ISC Parallel Front End Configuration 2 Register */
+#define ISC_PFE_CFG2    0x00000014
+
+#define ISC_PFE_CFG2_ROWMIN(v)		((v))
+#define ISC_PFE_CFG2_ROWMIN_MASK	GENMASK(15, 0)
+#define ISC_PFE_CFG2_ROWMAX(v)		((v) << 16)
+#define ISC_PFE_CFG2_ROWMAX_MASK	GENMASK(31, 16)
+
+/* ISC Clock Enable Register */
+#define ISC_CLKEN               0x00000018
+
+/* ISC Clock Disable Register */
+#define ISC_CLKDIS              0x0000001c
+
+/* ISC Clock Status Register */
+#define ISC_CLKSR               0x00000020
+#define ISC_CLKSR_SIP		BIT(31)
+
+#define ISC_CLK(n)		BIT(n)
+
+/* ISC Clock Configuration Register */
+#define ISC_CLKCFG              0x00000024
+#define ISC_CLKCFG_DIV_SHIFT(n) ((n)*16)
+#define ISC_CLKCFG_DIV_MASK(n)  GENMASK(((n)*16 + 7), (n)*16)
+#define ISC_CLKCFG_SEL_SHIFT(n) ((n)*16 + 8)
+#define ISC_CLKCFG_SEL_MASK(n)  GENMASK(((n)*17 + 8), ((n)*16 + 8))
+
+/* ISC Interrupt Enable Register */
+#define ISC_INTEN       0x00000028
+
+/* ISC Interrupt Disable Register */
+#define ISC_INTDIS      0x0000002c
+
+/* ISC Interrupt Mask Register */
+#define ISC_INTMASK     0x00000030
+
+/* ISC Interrupt Status Register */
+#define ISC_INTSR       0x00000034
+
+#define ISC_INT_DDONE		BIT(8)
+#define ISC_INT_HISDONE		BIT(12)
+
+/* ISC DPC Control Register */
+#define ISC_DPC_CTRL	0x40
+
+#define ISC_DPC_CTRL_DPCEN	BIT(0)
+#define ISC_DPC_CTRL_GDCEN	BIT(1)
+#define ISC_DPC_CTRL_BLCEN	BIT(2)
+
+/* ISC DPC Config Register */
+#define ISC_DPC_CFG	0x44
+
+#define ISC_DPC_CFG_BAYSEL_SHIFT	0
+
+#define ISC_DPC_CFG_EITPOL		BIT(4)
+
+#define ISC_DPC_CFG_TA_ENABLE		BIT(14)
+#define ISC_DPC_CFG_TC_ENABLE		BIT(13)
+#define ISC_DPC_CFG_TM_ENABLE		BIT(12)
+
+#define ISC_DPC_CFG_RE_MODE		BIT(17)
+
+#define ISC_DPC_CFG_GDCCLP_SHIFT	20
+#define ISC_DPC_CFG_GDCCLP_MASK		GENMASK(22, 20)
+
+#define ISC_DPC_CFG_BLOFF_SHIFT		24
+#define ISC_DPC_CFG_BLOFF_MASK		GENMASK(31, 24)
+
+#define ISC_DPC_CFG_BAYCFG_SHIFT	0
+#define ISC_DPC_CFG_BAYCFG_MASK		GENMASK(1, 0)
+/* ISC DPC Threshold Median Register */
+#define ISC_DPC_THRESHM	0x48
+
+/* ISC DPC Threshold Closest Register */
+#define ISC_DPC_THRESHC	0x4C
+
+/* ISC DPC Threshold Average Register */
+#define ISC_DPC_THRESHA	0x50
+
+/* ISC DPC STatus Register */
+#define ISC_DPC_SR	0x54
+
+/* ISC White Balance Control Register */
+#define ISC_WB_CTRL     0x00000058
+
+/* ISC White Balance Configuration Register */
+#define ISC_WB_CFG      0x0000005c
+
+/* ISC White Balance Offset for R, GR Register */
+#define ISC_WB_O_RGR	0x00000060
+
+/* ISC White Balance Offset for B, GB Register */
+#define ISC_WB_O_BGB	0x00000064
+
+/* ISC White Balance Gain for R, GR Register */
+#define ISC_WB_G_RGR	0x00000068
+
+/* ISC White Balance Gain for B, GB Register */
+#define ISC_WB_G_BGB	0x0000006c
+
+/* ISC Color Filter Array Control Register */
+#define ISC_CFA_CTRL    0x00000070
+
+/* ISC Color Filter Array Configuration Register */
+#define ISC_CFA_CFG     0x00000074
+#define ISC_CFA_CFG_EITPOL	BIT(4)
+
+#define ISC_BAY_CFG_GRGR	0x0
+#define ISC_BAY_CFG_RGRG	0x1
+#define ISC_BAY_CFG_GBGB	0x2
+#define ISC_BAY_CFG_BGBG	0x3
+
+/* ISC Color Correction Control Register */
+#define ISC_CC_CTRL     0x00000078
+
+/* ISC Color Correction RR RG Register */
+#define ISC_CC_RR_RG	0x0000007c
+
+/* ISC Color Correction RB OR Register */
+#define ISC_CC_RB_OR	0x00000080
+
+/* ISC Color Correction GR GG Register */
+#define ISC_CC_GR_GG	0x00000084
+
+/* ISC Color Correction GB OG Register */
+#define ISC_CC_GB_OG	0x00000088
+
+/* ISC Color Correction BR BG Register */
+#define ISC_CC_BR_BG	0x0000008c
+
+/* ISC Color Correction BB OB Register */
+#define ISC_CC_BB_OB	0x00000090
+
+/* ISC Gamma Correction Control Register */
+#define ISC_GAM_CTRL    0x00000094
+
+#define ISC_GAM_CTRL_BIPART	BIT(4)
+
+/* ISC_Gamma Correction Blue Entry Register */
+#define ISC_GAM_BENTRY	0x00000098
+
+/* ISC_Gamma Correction Green Entry Register */
+#define ISC_GAM_GENTRY	0x00000198
+
+/* ISC_Gamma Correction Green Entry Register */
+#define ISC_GAM_RENTRY	0x00000298
+
+/* ISC VHXS Control Register */
+#define ISC_VHXS_CTRL	0x398
+
+/* ISC VHXS Source Size Register */
+#define ISC_VHXS_SS	0x39C
+
+/* ISC VHXS Destination Size Register */
+#define ISC_VHXS_DS	0x3A0
+
+/* ISC Vertical Factor Register */
+#define ISC_VXS_FACT	0x3a4
+
+/* ISC Horizontal Factor Register */
+#define ISC_HXS_FACT	0x3a8
+
+/* ISC Vertical Config Register */
+#define ISC_VXS_CFG	0x3ac
+
+/* ISC Horizontal Config Register */
+#define ISC_HXS_CFG	0x3b0
+
+/* ISC Vertical Tap Register */
+#define ISC_VXS_TAP	0x3b4
+
+/* ISC Horizontal Tap Register */
+#define ISC_HXS_TAP	0x434
+
+/* Offset for CSC register specific to sama5d2 product */
+#define ISC_SAMA5D2_CSC_OFFSET	0
+/* Offset for CSC register specific to sama7g5 product */
+#define ISC_SAMA7G5_CSC_OFFSET	0x11c
+
+/* Color Space Conversion Control Register */
+#define ISC_CSC_CTRL    0x00000398
+
+/* Color Space Conversion YR YG Register */
+#define ISC_CSC_YR_YG	0x0000039c
+
+/* Color Space Conversion YB OY Register */
+#define ISC_CSC_YB_OY	0x000003a0
+
+/* Color Space Conversion CBR CBG Register */
+#define ISC_CSC_CBR_CBG	0x000003a4
+
+/* Color Space Conversion CBB OCB Register */
+#define ISC_CSC_CBB_OCB	0x000003a8
+
+/* Color Space Conversion CRR CRG Register */
+#define ISC_CSC_CRR_CRG	0x000003ac
+
+/* Color Space Conversion CRB OCR Register */
+#define ISC_CSC_CRB_OCR	0x000003b0
+
+/* Offset for CBC register specific to sama5d2 product */
+#define ISC_SAMA5D2_CBC_OFFSET	0
+/* Offset for CBC register specific to sama7g5 product */
+#define ISC_SAMA7G5_CBC_OFFSET	0x11c
+
+/* Contrast And Brightness Control Register */
+#define ISC_CBC_CTRL    0x000003b4
+
+/* Contrast And Brightness Configuration Register */
+#define ISC_CBC_CFG	0x000003b8
+
+/* Brightness Register */
+#define ISC_CBC_BRIGHT	0x000003bc
+#define ISC_CBC_BRIGHT_MASK	GENMASK(10, 0)
+
+/* Contrast Register */
+#define ISC_CBC_CONTRAST	0x000003c0
+#define ISC_CBC_CONTRAST_MASK	GENMASK(11, 0)
+
+/* Hue Register */
+#define ISC_CBCHS_HUE	0x4e0
+/* Saturation Register */
+#define ISC_CBCHS_SAT	0x4e4
+
+/* Offset for SUB422 register specific to sama5d2 product */
+#define ISC_SAMA5D2_SUB422_OFFSET	0
+/* Offset for SUB422 register specific to sama7g5 product */
+#define ISC_SAMA7G5_SUB422_OFFSET	0x124
+
+/* Subsampling 4:4:4 to 4:2:2 Control Register */
+#define ISC_SUB422_CTRL 0x000003c4
+
+/* Offset for SUB420 register specific to sama5d2 product */
+#define ISC_SAMA5D2_SUB420_OFFSET	0
+/* Offset for SUB420 register specific to sama7g5 product */
+#define ISC_SAMA7G5_SUB420_OFFSET	0x124
+/* Subsampling 4:2:2 to 4:2:0 Control Register */
+#define ISC_SUB420_CTRL 0x000003cc
+
+/* Offset for RLP register specific to sama5d2 product */
+#define ISC_SAMA5D2_RLP_OFFSET	0
+/* Offset for RLP register specific to sama7g5 product */
+#define ISC_SAMA7G5_RLP_OFFSET	0x124
+/* Rounding, Limiting and Packing Configuration Register */
+#define ISC_RLP_CFG     0x000003d0
+
+#define ISC_RLP_CFG_MODE_DAT8           0x0
+#define ISC_RLP_CFG_MODE_DAT9           0x1
+#define ISC_RLP_CFG_MODE_DAT10          0x2
+#define ISC_RLP_CFG_MODE_DAT11          0x3
+#define ISC_RLP_CFG_MODE_DAT12          0x4
+#define ISC_RLP_CFG_MODE_DATY8          0x5
+#define ISC_RLP_CFG_MODE_DATY10         0x6
+#define ISC_RLP_CFG_MODE_ARGB444        0x7
+#define ISC_RLP_CFG_MODE_ARGB555        0x8
+#define ISC_RLP_CFG_MODE_RGB565         0x9
+#define ISC_RLP_CFG_MODE_ARGB32         0xa
+#define ISC_RLP_CFG_MODE_YYCC           0xb
+#define ISC_RLP_CFG_MODE_YYCC_LIMITED   0xc
+#define ISC_RLP_CFG_MODE_YCYC           0xd
+#define ISC_RLP_CFG_MODE_MASK           GENMASK(3, 0)
+
+#define ISC_RLP_CFG_LSH			BIT(5)
+
+#define ISC_RLP_CFG_YMODE_YUYV		(3 << 6)
+#define ISC_RLP_CFG_YMODE_YVYU		(2 << 6)
+#define ISC_RLP_CFG_YMODE_VYUY		(0 << 6)
+#define ISC_RLP_CFG_YMODE_UYVY		(1 << 6)
+
+#define ISC_RLP_CFG_YMODE_MASK		GENMASK(7, 6)
+
+/* Offset for HIS register specific to sama5d2 product */
+#define ISC_SAMA5D2_HIS_OFFSET	0
+/* Offset for HIS register specific to sama7g5 product */
+#define ISC_SAMA7G5_HIS_OFFSET	0x124
+/* Histogram Control Register */
+#define ISC_HIS_CTRL	0x000003d4
+
+#define ISC_HIS_CTRL_EN			BIT(0)
+#define ISC_HIS_CTRL_DIS		0x0
+
+/* Histogram Configuration Register */
+#define ISC_HIS_CFG	0x000003d8
+
+#define ISC_HIS_CFG_MODE_GR		0x0
+#define ISC_HIS_CFG_MODE_R		0x1
+#define ISC_HIS_CFG_MODE_GB		0x2
+#define ISC_HIS_CFG_MODE_B		0x3
+#define ISC_HIS_CFG_MODE_Y		0x4
+#define ISC_HIS_CFG_MODE_RAW		0x5
+#define ISC_HIS_CFG_MODE_YCCIR656	0x6
+
+#define ISC_HIS_CFG_BAYSEL_SHIFT	4
+
+#define ISC_HIS_CFG_RAR			BIT(8)
+
+/* Offset for DMA register specific to sama5d2 product */
+#define ISC_SAMA5D2_DMA_OFFSET	0
+/* Offset for DMA register specific to sama7g5 product */
+#define ISC_SAMA7G5_DMA_OFFSET	0x13c
+
+/* DMA Configuration Register */
+#define ISC_DCFG        0x000003e0
+#define ISC_DCFG_IMODE_PACKED8          0x0
+#define ISC_DCFG_IMODE_PACKED16         0x1
+#define ISC_DCFG_IMODE_PACKED32         0x2
+#define ISC_DCFG_IMODE_YC422SP          0x3
+#define ISC_DCFG_IMODE_YC422P           0x4
+#define ISC_DCFG_IMODE_YC420SP          0x5
+#define ISC_DCFG_IMODE_YC420P           0x6
+#define ISC_DCFG_IMODE_MASK             GENMASK(2, 0)
+
+#define ISC_DCFG_YMBSIZE_SINGLE         (0x0 << 4)
+#define ISC_DCFG_YMBSIZE_BEATS4         (0x1 << 4)
+#define ISC_DCFG_YMBSIZE_BEATS8         (0x2 << 4)
+#define ISC_DCFG_YMBSIZE_BEATS16        (0x3 << 4)
+#define ISC_DCFG_YMBSIZE_BEATS32        (0x4 << 4)
+#define ISC_DCFG_YMBSIZE_MASK           GENMASK(6, 4)
+
+#define ISC_DCFG_CMBSIZE_SINGLE         (0x0 << 8)
+#define ISC_DCFG_CMBSIZE_BEATS4         (0x1 << 8)
+#define ISC_DCFG_CMBSIZE_BEATS8         (0x2 << 8)
+#define ISC_DCFG_CMBSIZE_BEATS16        (0x3 << 8)
+#define ISC_DCFG_CMBSIZE_BEATS32        (0x4 << 8)
+#define ISC_DCFG_CMBSIZE_MASK           GENMASK(10, 8)
+
+/* DMA Control Register */
+#define ISC_DCTRL       0x000003e4
+
+#define ISC_DCTRL_DVIEW_PACKED          (0x0 << 1)
+#define ISC_DCTRL_DVIEW_SEMIPLANAR      (0x1 << 1)
+#define ISC_DCTRL_DVIEW_PLANAR          (0x2 << 1)
+#define ISC_DCTRL_DVIEW_MASK            GENMASK(2, 1)
+
+#define ISC_DCTRL_IE_IS			(0x0 << 4)
+
+/* DMA Descriptor Address Register */
+#define ISC_DNDA        0x000003e8
+
+/* DMA Address 0 Register */
+#define ISC_DAD0        0x000003ec
+
+/* DMA Address 1 Register */
+#define ISC_DAD1        0x000003f4
+
+/* DMA Address 2 Register */
+#define ISC_DAD2        0x000003fc
+
+/* Offset for version register specific to sama5d2 product */
+#define ISC_SAMA5D2_VERSION_OFFSET	0
+#define ISC_SAMA7G5_VERSION_OFFSET	0x13c
+/* Version Register */
+#define ISC_VERSION	0x0000040c
+
+/* Offset for version register specific to sama5d2 product */
+#define ISC_SAMA5D2_HIS_ENTRY_OFFSET	0
+/* Offset for version register specific to sama7g5 product */
+#define ISC_SAMA7G5_HIS_ENTRY_OFFSET	0x14c
+/* Histogram Entry */
+#define ISC_HIS_ENTRY	0x00000410
+
+#endif
diff --git a/drivers/staging/media/deprecated/atmel/atmel-isc.h b/drivers/staging/media/deprecated/atmel/atmel-isc.h
new file mode 100644
index 0000000000..31767ea74b
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/atmel-isc.h
@@ -0,0 +1,362 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Microchip Image Sensor Controller (ISC) driver header file
+ *
+ * Copyright (C) 2016-2019 Microchip Technology, Inc.
+ *
+ * Author: Songjun Wu
+ * Author: Eugen Hristev <eugen.hristev@microchip.com>
+ *
+ */
+#ifndef _ATMEL_ISC_H_
+
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/videobuf2-dma-contig.h>
+
+#define ISC_CLK_MAX_DIV		255
+
+enum isc_clk_id {
+	ISC_ISPCK = 0,
+	ISC_MCK = 1,
+};
+
+struct isc_clk {
+	struct clk_hw   hw;
+	struct clk      *clk;
+	struct regmap   *regmap;
+	spinlock_t	lock;	/* serialize access to clock registers */
+	u8		id;
+	u8		parent_id;
+	u32		div;
+	struct device	*dev;
+};
+
+#define to_isc_clk(v) container_of(v, struct isc_clk, hw)
+
+struct isc_buffer {
+	struct vb2_v4l2_buffer  vb;
+	struct list_head	list;
+};
+
+struct isc_subdev_entity {
+	struct v4l2_subdev		*sd;
+	struct v4l2_async_connection	*asd;
+	struct device_node		*epn;
+	struct v4l2_async_notifier      notifier;
+
+	u32 pfe_cfg0;
+
+	struct list_head list;
+};
+
+/*
+ * struct isc_format - ISC media bus format information
+			This structure represents the interface between the ISC
+			and the sensor. It's the input format received by
+			the ISC.
+ * @fourcc:		Fourcc code for this format
+ * @mbus_code:		V4L2 media bus format code.
+ * @cfa_baycfg:		If this format is RAW BAYER, indicate the type of bayer.
+			this is either BGBG, RGRG, etc.
+ * @pfe_cfg0_bps:	Number of hardware data lines connected to the ISC
+ */
+
+struct isc_format {
+	u32	fourcc;
+	u32	mbus_code;
+	u32	cfa_baycfg;
+
+	bool	sd_support;
+	u32	pfe_cfg0_bps;
+};
+
+/* Pipeline bitmap */
+#define DPC_DPCENABLE	BIT(0)
+#define DPC_GDCENABLE	BIT(1)
+#define DPC_BLCENABLE	BIT(2)
+#define WB_ENABLE	BIT(3)
+#define CFA_ENABLE	BIT(4)
+#define CC_ENABLE	BIT(5)
+#define GAM_ENABLE	BIT(6)
+#define GAM_BENABLE	BIT(7)
+#define GAM_GENABLE	BIT(8)
+#define GAM_RENABLE	BIT(9)
+#define VHXS_ENABLE	BIT(10)
+#define CSC_ENABLE	BIT(11)
+#define CBC_ENABLE	BIT(12)
+#define SUB422_ENABLE	BIT(13)
+#define SUB420_ENABLE	BIT(14)
+
+#define GAM_ENABLES	(GAM_RENABLE | GAM_GENABLE | GAM_BENABLE | GAM_ENABLE)
+
+/*
+ * struct fmt_config - ISC format configuration and internal pipeline
+			This structure represents the internal configuration
+			of the ISC.
+			It also holds the format that ISC will present to v4l2.
+ * @sd_format:		Pointer to an isc_format struct that holds the sensor
+			configuration.
+ * @fourcc:		Fourcc code for this format.
+ * @bpp:		Bytes per pixel in the current format.
+ * @bpp_v4l2:		Bytes per pixel in the current format, for v4l2.
+			This differs from 'bpp' in the sense that in planar
+			formats, it refers only to the first plane.
+ * @rlp_cfg_mode:	Configuration of the RLP (rounding, limiting packaging)
+ * @dcfg_imode:		Configuration of the input of the DMA module
+ * @dctrl_dview:	Configuration of the output of the DMA module
+ * @bits_pipeline:	Configuration of the pipeline, which modules are enabled
+ */
+struct fmt_config {
+	struct isc_format	*sd_format;
+
+	u32			fourcc;
+	u8			bpp;
+	u8			bpp_v4l2;
+
+	u32			rlp_cfg_mode;
+	u32			dcfg_imode;
+	u32			dctrl_dview;
+
+	u32			bits_pipeline;
+};
+
+#define HIST_ENTRIES		512
+#define HIST_BAYER		(ISC_HIS_CFG_MODE_B + 1)
+
+enum{
+	HIST_INIT = 0,
+	HIST_ENABLED,
+	HIST_DISABLED,
+};
+
+struct isc_ctrls {
+	struct v4l2_ctrl_handler handler;
+
+	u32 brightness;
+	u32 contrast;
+	u8 gamma_index;
+#define ISC_WB_NONE	0
+#define ISC_WB_AUTO	1
+#define ISC_WB_ONETIME	2
+	u8 awb;
+
+	/* one for each component : GR, R, GB, B */
+	u32 gain[HIST_BAYER];
+	s32 offset[HIST_BAYER];
+
+	u32 hist_entry[HIST_ENTRIES];
+	u32 hist_count[HIST_BAYER];
+	u8 hist_id;
+	u8 hist_stat;
+#define HIST_MIN_INDEX		0
+#define HIST_MAX_INDEX		1
+	u32 hist_minmax[HIST_BAYER][2];
+};
+
+#define ISC_PIPE_LINE_NODE_NUM	15
+
+/*
+ * struct isc_reg_offsets - ISC device register offsets
+ * @csc:		Offset for the CSC register
+ * @cbc:		Offset for the CBC register
+ * @sub422:		Offset for the SUB422 register
+ * @sub420:		Offset for the SUB420 register
+ * @rlp:		Offset for the RLP register
+ * @his:		Offset for the HIS related registers
+ * @dma:		Offset for the DMA related registers
+ * @version:		Offset for the version register
+ * @his_entry:		Offset for the HIS entries registers
+ */
+struct isc_reg_offsets {
+	u32 csc;
+	u32 cbc;
+	u32 sub422;
+	u32 sub420;
+	u32 rlp;
+	u32 his;
+	u32 dma;
+	u32 version;
+	u32 his_entry;
+};
+
+/*
+ * struct isc_device - ISC device driver data/config struct
+ * @regmap:		Register map
+ * @hclock:		Hclock clock input (refer datasheet)
+ * @ispck:		iscpck clock (refer datasheet)
+ * @isc_clks:		ISC clocks
+ * @ispck_required:	ISC requires ISP Clock initialization
+ * @dcfg:		DMA master configuration, architecture dependent
+ *
+ * @dev:		Registered device driver
+ * @v4l2_dev:		v4l2 registered device
+ * @video_dev:		registered video device
+ *
+ * @vb2_vidq:		video buffer 2 video queue
+ * @dma_queue_lock:	lock to serialize the dma buffer queue
+ * @dma_queue:		the queue for dma buffers
+ * @cur_frm:		current isc frame/buffer
+ * @sequence:		current frame number
+ * @stop:		true if isc is not streaming, false if streaming
+ * @comp:		completion reference that signals frame completion
+ *
+ * @fmt:		current v42l format
+ * @user_formats:	list of formats that are supported and agreed with sd
+ * @num_user_formats:	how many formats are in user_formats
+ *
+ * @config:		current ISC format configuration
+ * @try_config:		the current ISC try format , not yet activated
+ *
+ * @ctrls:		holds information about ISC controls
+ * @do_wb_ctrl:		control regarding the DO_WHITE_BALANCE button
+ * @awb_work:		workqueue reference for autowhitebalance histogram
+ *			analysis
+ *
+ * @lock:		lock for serializing userspace file operations
+ *			with ISC operations
+ * @awb_mutex:		serialize access to streaming status from awb work queue
+ * @awb_lock:		lock for serializing awb work queue operations
+ *			with DMA/buffer operations
+ *
+ * @pipeline:		configuration of the ISC pipeline
+ *
+ * @current_subdev:	current subdevice: the sensor
+ * @subdev_entities:	list of subdevice entitites
+ *
+ * @gamma_table:	pointer to the table with gamma values, has
+ *			gamma_max sets of GAMMA_ENTRIES entries each
+ * @gamma_max:		maximum number of sets of inside the gamma_table
+ *
+ * @max_width:		maximum frame width, dependent on the internal RAM
+ * @max_height:		maximum frame height, dependent on the internal RAM
+ *
+ * @config_dpc:		pointer to a function that initializes product
+ *			specific DPC module
+ * @config_csc:		pointer to a function that initializes product
+ *			specific CSC module
+ * @config_cbc:		pointer to a function that initializes product
+ *			specific CBC module
+ * @config_cc:		pointer to a function that initializes product
+ *			specific CC module
+ * @config_gam:		pointer to a function that initializes product
+ *			specific GAMMA module
+ * @config_rlp:		pointer to a function that initializes product
+ *			specific RLP module
+ * @config_ctrls:	pointer to a functoin that initializes product
+ *			specific v4l2 controls.
+ *
+ * @adapt_pipeline:	pointer to a function that adapts the pipeline bits
+ *			to the product specific pipeline
+ *
+ * @offsets:		struct holding the product specific register offsets
+ * @controller_formats:	pointer to the array of possible formats that the
+ *			controller can output
+ * @formats_list:	pointer to the array of possible formats that can
+ *			be used as an input to the controller
+ * @controller_formats_size:	size of controller_formats array
+ * @formats_list_size:	size of formats_list array
+ */
+struct isc_device {
+	struct regmap		*regmap;
+	struct clk		*hclock;
+	struct clk		*ispck;
+	struct isc_clk		isc_clks[2];
+	bool			ispck_required;
+	u32			dcfg;
+
+	struct device		*dev;
+	struct v4l2_device	v4l2_dev;
+	struct video_device	video_dev;
+
+	struct vb2_queue	vb2_vidq;
+	spinlock_t		dma_queue_lock;
+	struct list_head	dma_queue;
+	struct isc_buffer	*cur_frm;
+	unsigned int		sequence;
+	bool			stop;
+	struct completion	comp;
+
+	struct v4l2_format	fmt;
+	struct isc_format	**user_formats;
+	unsigned int		num_user_formats;
+
+	struct fmt_config	config;
+	struct fmt_config	try_config;
+
+	struct isc_ctrls	ctrls;
+	struct work_struct	awb_work;
+
+	struct mutex		lock;
+	struct mutex		awb_mutex;
+	spinlock_t		awb_lock;
+
+	struct regmap_field	*pipeline[ISC_PIPE_LINE_NODE_NUM];
+
+	struct isc_subdev_entity	*current_subdev;
+	struct list_head		subdev_entities;
+
+	struct {
+#define ISC_CTRL_DO_WB 1
+#define ISC_CTRL_R_GAIN 2
+#define ISC_CTRL_B_GAIN 3
+#define ISC_CTRL_GR_GAIN 4
+#define ISC_CTRL_GB_GAIN 5
+#define ISC_CTRL_R_OFF 6
+#define ISC_CTRL_B_OFF 7
+#define ISC_CTRL_GR_OFF 8
+#define ISC_CTRL_GB_OFF 9
+		struct v4l2_ctrl	*awb_ctrl;
+		struct v4l2_ctrl	*do_wb_ctrl;
+		struct v4l2_ctrl	*r_gain_ctrl;
+		struct v4l2_ctrl	*b_gain_ctrl;
+		struct v4l2_ctrl	*gr_gain_ctrl;
+		struct v4l2_ctrl	*gb_gain_ctrl;
+		struct v4l2_ctrl	*r_off_ctrl;
+		struct v4l2_ctrl	*b_off_ctrl;
+		struct v4l2_ctrl	*gr_off_ctrl;
+		struct v4l2_ctrl	*gb_off_ctrl;
+	};
+
+#define GAMMA_ENTRIES	64
+	/* pointer to the defined gamma table */
+	const u32	(*gamma_table)[GAMMA_ENTRIES];
+	u32		gamma_max;
+
+	u32		max_width;
+	u32		max_height;
+
+	struct {
+		void (*config_dpc)(struct isc_device *isc);
+		void (*config_csc)(struct isc_device *isc);
+		void (*config_cbc)(struct isc_device *isc);
+		void (*config_cc)(struct isc_device *isc);
+		void (*config_gam)(struct isc_device *isc);
+		void (*config_rlp)(struct isc_device *isc);
+
+		void (*config_ctrls)(struct isc_device *isc,
+				     const struct v4l2_ctrl_ops *ops);
+
+		void (*adapt_pipeline)(struct isc_device *isc);
+	};
+
+	struct isc_reg_offsets		offsets;
+	const struct isc_format		*controller_formats;
+	struct isc_format		*formats_list;
+	u32				controller_formats_size;
+	u32				formats_list_size;
+};
+
+extern const struct regmap_config atmel_isc_regmap_config;
+extern const struct v4l2_async_notifier_operations atmel_isc_async_ops;
+
+irqreturn_t atmel_isc_interrupt(int irq, void *dev_id);
+int atmel_isc_pipeline_init(struct isc_device *isc);
+int atmel_isc_clk_init(struct isc_device *isc);
+void atmel_isc_subdev_cleanup(struct isc_device *isc);
+void atmel_isc_clk_cleanup(struct isc_device *isc);
+
+#endif
diff --git a/drivers/staging/media/deprecated/atmel/atmel-sama5d2-isc.c b/drivers/staging/media/deprecated/atmel/atmel-sama5d2-isc.c
new file mode 100644
index 0000000000..31b2b48085
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/atmel-sama5d2-isc.c
@@ -0,0 +1,648 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Microchip Image Sensor Controller (ISC) driver
+ *
+ * Copyright (C) 2016-2019 Microchip Technology, Inc.
+ *
+ * Author: Songjun Wu
+ * Author: Eugen Hristev <eugen.hristev@microchip.com>
+ *
+ *
+ * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA
+ *
+ * ISC video pipeline integrates the following submodules:
+ * PFE: Parallel Front End to sample the camera sensor input stream
+ *  WB: Programmable white balance in the Bayer domain
+ * CFA: Color filter array interpolation module
+ *  CC: Programmable color correction
+ * GAM: Gamma correction
+ * CSC: Programmable color space conversion
+ * CBC: Contrast and Brightness control
+ * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling
+ * RLP: This module performs rounding, range limiting
+ *      and packing of the incoming data
+ */
+
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-image-sizes.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "atmel-isc-regs.h"
+#include "atmel-isc.h"
+
+#define ISC_SAMA5D2_MAX_SUPPORT_WIDTH   2592
+#define ISC_SAMA5D2_MAX_SUPPORT_HEIGHT  1944
+
+#define ISC_SAMA5D2_PIPELINE \
+	(WB_ENABLE | CFA_ENABLE | CC_ENABLE | GAM_ENABLES | CSC_ENABLE | \
+	CBC_ENABLE | SUB422_ENABLE | SUB420_ENABLE)
+
+/* This is a list of the formats that the ISC can *output* */
+static const struct isc_format sama5d2_controller_formats[] = {
+	{
+		.fourcc		= V4L2_PIX_FMT_ARGB444,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_ARGB555,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_RGB565,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_ABGR32,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_XBGR32,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_YUV420,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_YUYV,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_YUV422P,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_GREY,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_Y10,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SBGGR8,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SGBRG8,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SGRBG8,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SRGGB8,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SBGGR10,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SGBRG10,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SGRBG10,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SRGGB10,
+	},
+};
+
+/* This is a list of formats that the ISC can receive as *input* */
+static struct isc_format sama5d2_formats_list[] = {
+	{
+		.fourcc		= V4L2_PIX_FMT_SBGGR8,
+		.mbus_code	= MEDIA_BUS_FMT_SBGGR8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+		.cfa_baycfg	= ISC_BAY_CFG_BGBG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGBRG8,
+		.mbus_code	= MEDIA_BUS_FMT_SGBRG8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+		.cfa_baycfg	= ISC_BAY_CFG_GBGB,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGRBG8,
+		.mbus_code	= MEDIA_BUS_FMT_SGRBG8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+		.cfa_baycfg	= ISC_BAY_CFG_GRGR,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SRGGB8,
+		.mbus_code	= MEDIA_BUS_FMT_SRGGB8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+		.cfa_baycfg	= ISC_BAY_CFG_RGRG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SBGGR10,
+		.mbus_code	= MEDIA_BUS_FMT_SBGGR10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+		.cfa_baycfg	= ISC_BAY_CFG_RGRG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGBRG10,
+		.mbus_code	= MEDIA_BUS_FMT_SGBRG10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+		.cfa_baycfg	= ISC_BAY_CFG_GBGB,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGRBG10,
+		.mbus_code	= MEDIA_BUS_FMT_SGRBG10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+		.cfa_baycfg	= ISC_BAY_CFG_GRGR,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SRGGB10,
+		.mbus_code	= MEDIA_BUS_FMT_SRGGB10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+		.cfa_baycfg	= ISC_BAY_CFG_RGRG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SBGGR12,
+		.mbus_code	= MEDIA_BUS_FMT_SBGGR12_1X12,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TWELVE,
+		.cfa_baycfg	= ISC_BAY_CFG_BGBG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGBRG12,
+		.mbus_code	= MEDIA_BUS_FMT_SGBRG12_1X12,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TWELVE,
+		.cfa_baycfg	= ISC_BAY_CFG_GBGB,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGRBG12,
+		.mbus_code	= MEDIA_BUS_FMT_SGRBG12_1X12,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TWELVE,
+		.cfa_baycfg	= ISC_BAY_CFG_GRGR,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SRGGB12,
+		.mbus_code	= MEDIA_BUS_FMT_SRGGB12_1X12,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TWELVE,
+		.cfa_baycfg	= ISC_BAY_CFG_RGRG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_GREY,
+		.mbus_code	= MEDIA_BUS_FMT_Y8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_YUYV,
+		.mbus_code	= MEDIA_BUS_FMT_YUYV8_2X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_RGB565,
+		.mbus_code	= MEDIA_BUS_FMT_RGB565_2X8_LE,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_Y10,
+		.mbus_code	= MEDIA_BUS_FMT_Y10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+	},
+
+};
+
+static void isc_sama5d2_config_csc(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+
+	/* Convert RGB to YUV */
+	regmap_write(regmap, ISC_CSC_YR_YG + isc->offsets.csc,
+		     0x42 | (0x81 << 16));
+	regmap_write(regmap, ISC_CSC_YB_OY + isc->offsets.csc,
+		     0x19 | (0x10 << 16));
+	regmap_write(regmap, ISC_CSC_CBR_CBG + isc->offsets.csc,
+		     0xFDA | (0xFB6 << 16));
+	regmap_write(regmap, ISC_CSC_CBB_OCB + isc->offsets.csc,
+		     0x70 | (0x80 << 16));
+	regmap_write(regmap, ISC_CSC_CRR_CRG + isc->offsets.csc,
+		     0x70 | (0xFA2 << 16));
+	regmap_write(regmap, ISC_CSC_CRB_OCR + isc->offsets.csc,
+		     0xFEE | (0x80 << 16));
+}
+
+static void isc_sama5d2_config_cbc(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+
+	regmap_write(regmap, ISC_CBC_BRIGHT + isc->offsets.cbc,
+		     isc->ctrls.brightness);
+	regmap_write(regmap, ISC_CBC_CONTRAST + isc->offsets.cbc,
+		     isc->ctrls.contrast);
+}
+
+static void isc_sama5d2_config_cc(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+
+	/* Configure each register at the neutral fixed point 1.0 or 0.0 */
+	regmap_write(regmap, ISC_CC_RR_RG, (1 << 8));
+	regmap_write(regmap, ISC_CC_RB_OR, 0);
+	regmap_write(regmap, ISC_CC_GR_GG, (1 << 8) << 16);
+	regmap_write(regmap, ISC_CC_GB_OG, 0);
+	regmap_write(regmap, ISC_CC_BR_BG, 0);
+	regmap_write(regmap, ISC_CC_BB_OB, (1 << 8));
+}
+
+static void isc_sama5d2_config_ctrls(struct isc_device *isc,
+				     const struct v4l2_ctrl_ops *ops)
+{
+	struct isc_ctrls *ctrls = &isc->ctrls;
+	struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+
+	ctrls->contrast = 256;
+
+	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256);
+}
+
+static void isc_sama5d2_config_dpc(struct isc_device *isc)
+{
+	/* This module is not present on sama5d2 pipeline */
+}
+
+static void isc_sama5d2_config_gam(struct isc_device *isc)
+{
+	/* No specific gamma configuration */
+}
+
+static void isc_sama5d2_config_rlp(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+	u32 rlp_mode = isc->config.rlp_cfg_mode;
+
+	/*
+	 * In sama5d2, the YUV planar modes and the YUYV modes are treated
+	 * in the same way in RLP register.
+	 * Normally, YYCC mode should be Luma(n) - Color B(n) - Color R (n)
+	 * and YCYC should be Luma(n + 1) - Color B (n) - Luma (n) - Color R (n)
+	 * but in sama5d2, the YCYC mode does not exist, and YYCC must be
+	 * selected for both planar and interleaved modes, as in fact
+	 * both modes are supported.
+	 *
+	 * Thus, if the YCYC mode is selected, replace it with the
+	 * sama5d2-compliant mode which is YYCC .
+	 */
+	if ((rlp_mode & ISC_RLP_CFG_MODE_MASK) == ISC_RLP_CFG_MODE_YCYC) {
+		rlp_mode &= ~ISC_RLP_CFG_MODE_MASK;
+		rlp_mode |= ISC_RLP_CFG_MODE_YYCC;
+	}
+
+	regmap_update_bits(regmap, ISC_RLP_CFG + isc->offsets.rlp,
+			   ISC_RLP_CFG_MODE_MASK, rlp_mode);
+}
+
+static void isc_sama5d2_adapt_pipeline(struct isc_device *isc)
+{
+	isc->try_config.bits_pipeline &= ISC_SAMA5D2_PIPELINE;
+}
+
+/* Gamma table with gamma 1/2.2 */
+static const u32 isc_sama5d2_gamma_table[][GAMMA_ENTRIES] = {
+	/* 0 --> gamma 1/1.8 */
+	{      0x65,  0x66002F,  0x950025,  0xBB0020,  0xDB001D,  0xF8001A,
+	  0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012,
+	  0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F,
+	  0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E,
+	  0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C,
+	  0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B,
+	  0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A,
+	  0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A,
+	  0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A,
+	  0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009,
+	  0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 },
+
+	/* 1 --> gamma 1/2 */
+	{      0x7F,  0x800034,  0xB50028,  0xDE0021, 0x100001E, 0x11E001B,
+	  0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013,
+	  0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F,
+	  0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D,
+	  0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B,
+	  0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A,
+	  0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A,
+	  0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009,
+	  0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009,
+	  0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009,
+	  0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 },
+
+	/* 2 --> gamma 1/2.2 */
+	{      0x99,  0x9B0038,  0xD4002A,  0xFF0023, 0x122001F, 0x141001B,
+	  0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012,
+	  0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F,
+	  0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C,
+	  0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B,
+	  0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A,
+	  0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009,
+	  0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009,
+	  0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008,
+	  0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007,
+	  0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 },
+};
+
+static int isc_parse_dt(struct device *dev, struct isc_device *isc)
+{
+	struct device_node *np = dev->of_node;
+	struct device_node *epn = NULL;
+	struct isc_subdev_entity *subdev_entity;
+	unsigned int flags;
+	int ret;
+
+	INIT_LIST_HEAD(&isc->subdev_entities);
+
+	while (1) {
+		struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 };
+
+		epn = of_graph_get_next_endpoint(np, epn);
+		if (!epn)
+			return 0;
+
+		ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn),
+						 &v4l2_epn);
+		if (ret) {
+			ret = -EINVAL;
+			dev_err(dev, "Could not parse the endpoint\n");
+			break;
+		}
+
+		subdev_entity = devm_kzalloc(dev, sizeof(*subdev_entity),
+					     GFP_KERNEL);
+		if (!subdev_entity) {
+			ret = -ENOMEM;
+			break;
+		}
+		subdev_entity->epn = epn;
+
+		flags = v4l2_epn.bus.parallel.flags;
+
+		if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+			subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW;
+
+		if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+			subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW;
+
+		if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+			subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW;
+
+		if (v4l2_epn.bus_type == V4L2_MBUS_BT656)
+			subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC |
+					ISC_PFE_CFG0_CCIR656;
+
+		list_add_tail(&subdev_entity->list, &isc->subdev_entities);
+	}
+	of_node_put(epn);
+
+	return ret;
+}
+
+static int atmel_isc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct isc_device *isc;
+	void __iomem *io_base;
+	struct isc_subdev_entity *subdev_entity;
+	int irq;
+	int ret;
+	u32 ver;
+
+	isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL);
+	if (!isc)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, isc);
+	isc->dev = dev;
+
+	io_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(io_base))
+		return PTR_ERR(io_base);
+
+	isc->regmap = devm_regmap_init_mmio(dev, io_base, &atmel_isc_regmap_config);
+	if (IS_ERR(isc->regmap)) {
+		ret = PTR_ERR(isc->regmap);
+		dev_err(dev, "failed to init register map: %d\n", ret);
+		return ret;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ret = devm_request_irq(dev, irq, atmel_isc_interrupt, 0,
+			       "atmel-sama5d2-isc", isc);
+	if (ret < 0) {
+		dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
+			irq, ret);
+		return ret;
+	}
+
+	isc->gamma_table = isc_sama5d2_gamma_table;
+	isc->gamma_max = 2;
+
+	isc->max_width = ISC_SAMA5D2_MAX_SUPPORT_WIDTH;
+	isc->max_height = ISC_SAMA5D2_MAX_SUPPORT_HEIGHT;
+
+	isc->config_dpc = isc_sama5d2_config_dpc;
+	isc->config_csc = isc_sama5d2_config_csc;
+	isc->config_cbc = isc_sama5d2_config_cbc;
+	isc->config_cc = isc_sama5d2_config_cc;
+	isc->config_gam = isc_sama5d2_config_gam;
+	isc->config_rlp = isc_sama5d2_config_rlp;
+	isc->config_ctrls = isc_sama5d2_config_ctrls;
+
+	isc->adapt_pipeline = isc_sama5d2_adapt_pipeline;
+
+	isc->offsets.csc = ISC_SAMA5D2_CSC_OFFSET;
+	isc->offsets.cbc = ISC_SAMA5D2_CBC_OFFSET;
+	isc->offsets.sub422 = ISC_SAMA5D2_SUB422_OFFSET;
+	isc->offsets.sub420 = ISC_SAMA5D2_SUB420_OFFSET;
+	isc->offsets.rlp = ISC_SAMA5D2_RLP_OFFSET;
+	isc->offsets.his = ISC_SAMA5D2_HIS_OFFSET;
+	isc->offsets.dma = ISC_SAMA5D2_DMA_OFFSET;
+	isc->offsets.version = ISC_SAMA5D2_VERSION_OFFSET;
+	isc->offsets.his_entry = ISC_SAMA5D2_HIS_ENTRY_OFFSET;
+
+	isc->controller_formats = sama5d2_controller_formats;
+	isc->controller_formats_size = ARRAY_SIZE(sama5d2_controller_formats);
+	isc->formats_list = sama5d2_formats_list;
+	isc->formats_list_size = ARRAY_SIZE(sama5d2_formats_list);
+
+	/* sama5d2-isc - 8 bits per beat */
+	isc->dcfg = ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8;
+
+	/* sama5d2-isc : ISPCK is required and mandatory */
+	isc->ispck_required = true;
+
+	ret = atmel_isc_pipeline_init(isc);
+	if (ret)
+		return ret;
+
+	isc->hclock = devm_clk_get(dev, "hclock");
+	if (IS_ERR(isc->hclock)) {
+		ret = PTR_ERR(isc->hclock);
+		dev_err(dev, "failed to get hclock: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(isc->hclock);
+	if (ret) {
+		dev_err(dev, "failed to enable hclock: %d\n", ret);
+		return ret;
+	}
+
+	ret = atmel_isc_clk_init(isc);
+	if (ret) {
+		dev_err(dev, "failed to init isc clock: %d\n", ret);
+		goto unprepare_hclk;
+	}
+	ret = v4l2_device_register(dev, &isc->v4l2_dev);
+	if (ret) {
+		dev_err(dev, "unable to register v4l2 device.\n");
+		goto unprepare_clk;
+	}
+
+	ret = isc_parse_dt(dev, isc);
+	if (ret) {
+		dev_err(dev, "fail to parse device tree\n");
+		goto unregister_v4l2_device;
+	}
+
+	if (list_empty(&isc->subdev_entities)) {
+		dev_err(dev, "no subdev found\n");
+		ret = -ENODEV;
+		goto unregister_v4l2_device;
+	}
+
+	list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
+		struct v4l2_async_connection *asd;
+		struct fwnode_handle *fwnode =
+			of_fwnode_handle(subdev_entity->epn);
+
+		v4l2_async_nf_init(&subdev_entity->notifier, &isc->v4l2_dev);
+
+		asd = v4l2_async_nf_add_fwnode_remote(&subdev_entity->notifier,
+						      fwnode,
+						      struct v4l2_async_connection);
+
+		of_node_put(subdev_entity->epn);
+		subdev_entity->epn = NULL;
+
+		if (IS_ERR(asd)) {
+			ret = PTR_ERR(asd);
+			goto cleanup_subdev;
+		}
+
+		subdev_entity->notifier.ops = &atmel_isc_async_ops;
+
+		ret = v4l2_async_nf_register(&subdev_entity->notifier);
+		if (ret) {
+			dev_err(dev, "fail to register async notifier\n");
+			goto cleanup_subdev;
+		}
+
+		if (video_is_registered(&isc->video_dev))
+			break;
+	}
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_request_idle(dev);
+
+	isc->ispck = isc->isc_clks[ISC_ISPCK].clk;
+
+	ret = clk_prepare_enable(isc->ispck);
+	if (ret) {
+		dev_err(dev, "failed to enable ispck: %d\n", ret);
+		goto disable_pm;
+	}
+
+	/* ispck should be greater or equal to hclock */
+	ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock));
+	if (ret) {
+		dev_err(dev, "failed to set ispck rate: %d\n", ret);
+		goto unprepare_clk;
+	}
+
+	regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver);
+	dev_info(dev, "Microchip ISC version %x\n", ver);
+
+	return 0;
+
+unprepare_clk:
+	clk_disable_unprepare(isc->ispck);
+
+disable_pm:
+	pm_runtime_disable(dev);
+
+cleanup_subdev:
+	atmel_isc_subdev_cleanup(isc);
+
+unregister_v4l2_device:
+	v4l2_device_unregister(&isc->v4l2_dev);
+
+unprepare_hclk:
+	clk_disable_unprepare(isc->hclock);
+
+	atmel_isc_clk_cleanup(isc);
+
+	return ret;
+}
+
+static void atmel_isc_remove(struct platform_device *pdev)
+{
+	struct isc_device *isc = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(&pdev->dev);
+
+	atmel_isc_subdev_cleanup(isc);
+
+	v4l2_device_unregister(&isc->v4l2_dev);
+
+	clk_disable_unprepare(isc->ispck);
+	clk_disable_unprepare(isc->hclock);
+
+	atmel_isc_clk_cleanup(isc);
+}
+
+static int __maybe_unused isc_runtime_suspend(struct device *dev)
+{
+	struct isc_device *isc = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(isc->ispck);
+	clk_disable_unprepare(isc->hclock);
+
+	return 0;
+}
+
+static int __maybe_unused isc_runtime_resume(struct device *dev)
+{
+	struct isc_device *isc = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(isc->hclock);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(isc->ispck);
+	if (ret)
+		clk_disable_unprepare(isc->hclock);
+
+	return ret;
+}
+
+static const struct dev_pm_ops atmel_isc_dev_pm_ops = {
+	SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL)
+};
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id atmel_isc_of_match[] = {
+	{ .compatible = "atmel,sama5d2-isc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, atmel_isc_of_match);
+#endif
+
+static struct platform_driver atmel_isc_driver = {
+	.probe	= atmel_isc_probe,
+	.remove_new = atmel_isc_remove,
+	.driver	= {
+		.name		= "atmel-sama5d2-isc",
+		.pm		= &atmel_isc_dev_pm_ops,
+		.of_match_table = of_match_ptr(atmel_isc_of_match),
+	},
+};
+
+module_platform_driver(atmel_isc_driver);
+
+MODULE_AUTHOR("Songjun Wu");
+MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/media/deprecated/atmel/atmel-sama7g5-isc.c b/drivers/staging/media/deprecated/atmel/atmel-sama7g5-isc.c
new file mode 100644
index 0000000000..020034f631
--- /dev/null
+++ b/drivers/staging/media/deprecated/atmel/atmel-sama7g5-isc.c
@@ -0,0 +1,611 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Microchip eXtended Image Sensor Controller (XISC) driver
+ *
+ * Copyright (C) 2019-2021 Microchip Technology, Inc. and its subsidiaries
+ *
+ * Author: Eugen Hristev <eugen.hristev@microchip.com>
+ *
+ * Sensor-->PFE-->DPC-->WB-->CFA-->CC-->GAM-->VHXS-->CSC-->CBHS-->SUB-->RLP-->DMA-->HIS
+ *
+ * ISC video pipeline integrates the following submodules:
+ * PFE: Parallel Front End to sample the camera sensor input stream
+ * DPC: Defective Pixel Correction with black offset correction, green disparity
+ *      correction and defective pixel correction (3 modules total)
+ *  WB: Programmable white balance in the Bayer domain
+ * CFA: Color filter array interpolation module
+ *  CC: Programmable color correction
+ * GAM: Gamma correction
+ *VHXS: Vertical and Horizontal Scaler
+ * CSC: Programmable color space conversion
+ *CBHS: Contrast Brightness Hue and Saturation control
+ * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling
+ * RLP: This module performs rounding, range limiting
+ *      and packing of the incoming data
+ * DMA: This module performs DMA master accesses to write frames to external RAM
+ * HIS: Histogram module performs statistic counters on the frames
+ */
+
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-image-sizes.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "atmel-isc-regs.h"
+#include "atmel-isc.h"
+
+#define ISC_SAMA7G5_MAX_SUPPORT_WIDTH   3264
+#define ISC_SAMA7G5_MAX_SUPPORT_HEIGHT  2464
+
+#define ISC_SAMA7G5_PIPELINE \
+	(WB_ENABLE | CFA_ENABLE | CC_ENABLE | GAM_ENABLES | CSC_ENABLE | \
+	CBC_ENABLE | SUB422_ENABLE | SUB420_ENABLE)
+
+/* This is a list of the formats that the ISC can *output* */
+static const struct isc_format sama7g5_controller_formats[] = {
+	{
+		.fourcc		= V4L2_PIX_FMT_ARGB444,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_ARGB555,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_RGB565,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_ABGR32,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_XBGR32,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_YUV420,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_UYVY,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_VYUY,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_YUYV,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_YUV422P,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_GREY,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_Y10,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_Y16,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SBGGR8,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SGBRG8,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SGRBG8,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SRGGB8,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SBGGR10,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SGBRG10,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SGRBG10,
+	}, {
+		.fourcc		= V4L2_PIX_FMT_SRGGB10,
+	},
+};
+
+/* This is a list of formats that the ISC can receive as *input* */
+static struct isc_format sama7g5_formats_list[] = {
+	{
+		.fourcc		= V4L2_PIX_FMT_SBGGR8,
+		.mbus_code	= MEDIA_BUS_FMT_SBGGR8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+		.cfa_baycfg	= ISC_BAY_CFG_BGBG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGBRG8,
+		.mbus_code	= MEDIA_BUS_FMT_SGBRG8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+		.cfa_baycfg	= ISC_BAY_CFG_GBGB,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGRBG8,
+		.mbus_code	= MEDIA_BUS_FMT_SGRBG8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+		.cfa_baycfg	= ISC_BAY_CFG_GRGR,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SRGGB8,
+		.mbus_code	= MEDIA_BUS_FMT_SRGGB8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+		.cfa_baycfg	= ISC_BAY_CFG_RGRG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SBGGR10,
+		.mbus_code	= MEDIA_BUS_FMT_SBGGR10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+		.cfa_baycfg	= ISC_BAY_CFG_RGRG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGBRG10,
+		.mbus_code	= MEDIA_BUS_FMT_SGBRG10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+		.cfa_baycfg	= ISC_BAY_CFG_GBGB,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGRBG10,
+		.mbus_code	= MEDIA_BUS_FMT_SGRBG10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+		.cfa_baycfg	= ISC_BAY_CFG_GRGR,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SRGGB10,
+		.mbus_code	= MEDIA_BUS_FMT_SRGGB10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+		.cfa_baycfg	= ISC_BAY_CFG_RGRG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SBGGR12,
+		.mbus_code	= MEDIA_BUS_FMT_SBGGR12_1X12,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TWELVE,
+		.cfa_baycfg	= ISC_BAY_CFG_BGBG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGBRG12,
+		.mbus_code	= MEDIA_BUS_FMT_SGBRG12_1X12,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TWELVE,
+		.cfa_baycfg	= ISC_BAY_CFG_GBGB,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SGRBG12,
+		.mbus_code	= MEDIA_BUS_FMT_SGRBG12_1X12,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TWELVE,
+		.cfa_baycfg	= ISC_BAY_CFG_GRGR,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_SRGGB12,
+		.mbus_code	= MEDIA_BUS_FMT_SRGGB12_1X12,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TWELVE,
+		.cfa_baycfg	= ISC_BAY_CFG_RGRG,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_GREY,
+		.mbus_code	= MEDIA_BUS_FMT_Y8_1X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_YUYV,
+		.mbus_code	= MEDIA_BUS_FMT_YUYV8_2X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_UYVY,
+		.mbus_code	= MEDIA_BUS_FMT_UYVY8_2X8,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_RGB565,
+		.mbus_code	= MEDIA_BUS_FMT_RGB565_2X8_LE,
+		.pfe_cfg0_bps	= ISC_PFE_CFG0_BPS_EIGHT,
+	},
+	{
+		.fourcc		= V4L2_PIX_FMT_Y10,
+		.mbus_code	= MEDIA_BUS_FMT_Y10_1X10,
+		.pfe_cfg0_bps	= ISC_PFG_CFG0_BPS_TEN,
+	},
+};
+
+static void isc_sama7g5_config_csc(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+
+	/* Convert RGB to YUV */
+	regmap_write(regmap, ISC_CSC_YR_YG + isc->offsets.csc,
+		     0x42 | (0x81 << 16));
+	regmap_write(regmap, ISC_CSC_YB_OY + isc->offsets.csc,
+		     0x19 | (0x10 << 16));
+	regmap_write(regmap, ISC_CSC_CBR_CBG + isc->offsets.csc,
+		     0xFDA | (0xFB6 << 16));
+	regmap_write(regmap, ISC_CSC_CBB_OCB + isc->offsets.csc,
+		     0x70 | (0x80 << 16));
+	regmap_write(regmap, ISC_CSC_CRR_CRG + isc->offsets.csc,
+		     0x70 | (0xFA2 << 16));
+	regmap_write(regmap, ISC_CSC_CRB_OCR + isc->offsets.csc,
+		     0xFEE | (0x80 << 16));
+}
+
+static void isc_sama7g5_config_cbc(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+
+	/* Configure what is set via v4l2 ctrls */
+	regmap_write(regmap, ISC_CBC_BRIGHT + isc->offsets.cbc, isc->ctrls.brightness);
+	regmap_write(regmap, ISC_CBC_CONTRAST + isc->offsets.cbc, isc->ctrls.contrast);
+	/* Configure Hue and Saturation as neutral midpoint */
+	regmap_write(regmap, ISC_CBCHS_HUE, 0);
+	regmap_write(regmap, ISC_CBCHS_SAT, (1 << 4));
+}
+
+static void isc_sama7g5_config_cc(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+
+	/* Configure each register at the neutral fixed point 1.0 or 0.0 */
+	regmap_write(regmap, ISC_CC_RR_RG, (1 << 8));
+	regmap_write(regmap, ISC_CC_RB_OR, 0);
+	regmap_write(regmap, ISC_CC_GR_GG, (1 << 8) << 16);
+	regmap_write(regmap, ISC_CC_GB_OG, 0);
+	regmap_write(regmap, ISC_CC_BR_BG, 0);
+	regmap_write(regmap, ISC_CC_BB_OB, (1 << 8));
+}
+
+static void isc_sama7g5_config_ctrls(struct isc_device *isc,
+				     const struct v4l2_ctrl_ops *ops)
+{
+	struct isc_ctrls *ctrls = &isc->ctrls;
+	struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+
+	ctrls->contrast = 16;
+
+	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 16);
+}
+
+static void isc_sama7g5_config_dpc(struct isc_device *isc)
+{
+	u32 bay_cfg = isc->config.sd_format->cfa_baycfg;
+	struct regmap *regmap = isc->regmap;
+
+	regmap_update_bits(regmap, ISC_DPC_CFG, ISC_DPC_CFG_BLOFF_MASK,
+			   (64 << ISC_DPC_CFG_BLOFF_SHIFT));
+	regmap_update_bits(regmap, ISC_DPC_CFG, ISC_DPC_CFG_BAYCFG_MASK,
+			   (bay_cfg << ISC_DPC_CFG_BAYCFG_SHIFT));
+}
+
+static void isc_sama7g5_config_gam(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+
+	regmap_update_bits(regmap, ISC_GAM_CTRL, ISC_GAM_CTRL_BIPART,
+			   ISC_GAM_CTRL_BIPART);
+}
+
+static void isc_sama7g5_config_rlp(struct isc_device *isc)
+{
+	struct regmap *regmap = isc->regmap;
+	u32 rlp_mode = isc->config.rlp_cfg_mode;
+
+	regmap_update_bits(regmap, ISC_RLP_CFG + isc->offsets.rlp,
+			   ISC_RLP_CFG_MODE_MASK | ISC_RLP_CFG_LSH |
+			   ISC_RLP_CFG_YMODE_MASK, rlp_mode);
+}
+
+static void isc_sama7g5_adapt_pipeline(struct isc_device *isc)
+{
+	isc->try_config.bits_pipeline &= ISC_SAMA7G5_PIPELINE;
+}
+
+/* Gamma table with gamma 1/2.2 */
+static const u32 isc_sama7g5_gamma_table[][GAMMA_ENTRIES] = {
+	/* index 0 --> gamma bipartite */
+	{
+	      0x980,  0x4c0320,  0x650260,  0x7801e0,  0x8701a0,  0x940180,
+	   0xa00160,  0xab0120,  0xb40120,  0xbd0120,  0xc60100,  0xce0100,
+	   0xd600e0,  0xdd00e0,  0xe400e0,  0xeb00c0,  0xf100c0,  0xf700c0,
+	   0xfd00c0, 0x10300a0, 0x10800c0, 0x10e00a0, 0x11300a0, 0x11800a0,
+	  0x11d00a0, 0x12200a0, 0x12700a0, 0x12c0080, 0x13000a0, 0x1350080,
+	  0x13900a0, 0x13e0080, 0x1420076, 0x17d0062, 0x1ae0054, 0x1d8004a,
+	  0x1fd0044, 0x21f003e, 0x23e003a, 0x25b0036, 0x2760032, 0x28f0030,
+	  0x2a7002e, 0x2be002c, 0x2d4002c, 0x2ea0028, 0x2fe0028, 0x3120026,
+	  0x3250024, 0x3370024, 0x3490022, 0x35a0022, 0x36b0020, 0x37b0020,
+	  0x38b0020, 0x39b001e, 0x3aa001e, 0x3b9001c, 0x3c7001c, 0x3d5001c,
+	  0x3e3001c, 0x3f1001c, 0x3ff001a, 0x40c001a },
+};
+
+static int xisc_parse_dt(struct device *dev, struct isc_device *isc)
+{
+	struct device_node *np = dev->of_node;
+	struct device_node *epn = NULL;
+	struct isc_subdev_entity *subdev_entity;
+	unsigned int flags;
+	int ret;
+	bool mipi_mode;
+
+	INIT_LIST_HEAD(&isc->subdev_entities);
+
+	mipi_mode = of_property_read_bool(np, "microchip,mipi-mode");
+
+	while (1) {
+		struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 };
+
+		epn = of_graph_get_next_endpoint(np, epn);
+		if (!epn)
+			return 0;
+
+		ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn),
+						 &v4l2_epn);
+		if (ret) {
+			ret = -EINVAL;
+			dev_err(dev, "Could not parse the endpoint\n");
+			break;
+		}
+
+		subdev_entity = devm_kzalloc(dev, sizeof(*subdev_entity),
+					     GFP_KERNEL);
+		if (!subdev_entity) {
+			ret = -ENOMEM;
+			break;
+		}
+		subdev_entity->epn = epn;
+
+		flags = v4l2_epn.bus.parallel.flags;
+
+		if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+			subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW;
+
+		if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+			subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW;
+
+		if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+			subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW;
+
+		if (v4l2_epn.bus_type == V4L2_MBUS_BT656)
+			subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC |
+					ISC_PFE_CFG0_CCIR656;
+
+		if (mipi_mode)
+			subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_MIPI;
+
+		list_add_tail(&subdev_entity->list, &isc->subdev_entities);
+	}
+	of_node_put(epn);
+
+	return ret;
+}
+
+static int microchip_xisc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct isc_device *isc;
+	void __iomem *io_base;
+	struct isc_subdev_entity *subdev_entity;
+	int irq;
+	int ret;
+	u32 ver;
+
+	isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL);
+	if (!isc)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, isc);
+	isc->dev = dev;
+
+	io_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(io_base))
+		return PTR_ERR(io_base);
+
+	isc->regmap = devm_regmap_init_mmio(dev, io_base, &atmel_isc_regmap_config);
+	if (IS_ERR(isc->regmap)) {
+		ret = PTR_ERR(isc->regmap);
+		dev_err(dev, "failed to init register map: %d\n", ret);
+		return ret;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ret = devm_request_irq(dev, irq, atmel_isc_interrupt, 0,
+			       "microchip-sama7g5-xisc", isc);
+	if (ret < 0) {
+		dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
+			irq, ret);
+		return ret;
+	}
+
+	isc->gamma_table = isc_sama7g5_gamma_table;
+	isc->gamma_max = 0;
+
+	isc->max_width = ISC_SAMA7G5_MAX_SUPPORT_WIDTH;
+	isc->max_height = ISC_SAMA7G5_MAX_SUPPORT_HEIGHT;
+
+	isc->config_dpc = isc_sama7g5_config_dpc;
+	isc->config_csc = isc_sama7g5_config_csc;
+	isc->config_cbc = isc_sama7g5_config_cbc;
+	isc->config_cc = isc_sama7g5_config_cc;
+	isc->config_gam = isc_sama7g5_config_gam;
+	isc->config_rlp = isc_sama7g5_config_rlp;
+	isc->config_ctrls = isc_sama7g5_config_ctrls;
+
+	isc->adapt_pipeline = isc_sama7g5_adapt_pipeline;
+
+	isc->offsets.csc = ISC_SAMA7G5_CSC_OFFSET;
+	isc->offsets.cbc = ISC_SAMA7G5_CBC_OFFSET;
+	isc->offsets.sub422 = ISC_SAMA7G5_SUB422_OFFSET;
+	isc->offsets.sub420 = ISC_SAMA7G5_SUB420_OFFSET;
+	isc->offsets.rlp = ISC_SAMA7G5_RLP_OFFSET;
+	isc->offsets.his = ISC_SAMA7G5_HIS_OFFSET;
+	isc->offsets.dma = ISC_SAMA7G5_DMA_OFFSET;
+	isc->offsets.version = ISC_SAMA7G5_VERSION_OFFSET;
+	isc->offsets.his_entry = ISC_SAMA7G5_HIS_ENTRY_OFFSET;
+
+	isc->controller_formats = sama7g5_controller_formats;
+	isc->controller_formats_size = ARRAY_SIZE(sama7g5_controller_formats);
+	isc->formats_list = sama7g5_formats_list;
+	isc->formats_list_size = ARRAY_SIZE(sama7g5_formats_list);
+
+	/* sama7g5-isc RAM access port is full AXI4 - 32 bits per beat */
+	isc->dcfg = ISC_DCFG_YMBSIZE_BEATS32 | ISC_DCFG_CMBSIZE_BEATS32;
+
+	/* sama7g5-isc : ISPCK does not exist, ISC is clocked by MCK */
+	isc->ispck_required = false;
+
+	ret = atmel_isc_pipeline_init(isc);
+	if (ret)
+		return ret;
+
+	isc->hclock = devm_clk_get(dev, "hclock");
+	if (IS_ERR(isc->hclock)) {
+		ret = PTR_ERR(isc->hclock);
+		dev_err(dev, "failed to get hclock: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(isc->hclock);
+	if (ret) {
+		dev_err(dev, "failed to enable hclock: %d\n", ret);
+		return ret;
+	}
+
+	ret = atmel_isc_clk_init(isc);
+	if (ret) {
+		dev_err(dev, "failed to init isc clock: %d\n", ret);
+		goto unprepare_hclk;
+	}
+
+	ret = v4l2_device_register(dev, &isc->v4l2_dev);
+	if (ret) {
+		dev_err(dev, "unable to register v4l2 device.\n");
+		goto unprepare_hclk;
+	}
+
+	ret = xisc_parse_dt(dev, isc);
+	if (ret) {
+		dev_err(dev, "fail to parse device tree\n");
+		goto unregister_v4l2_device;
+	}
+
+	if (list_empty(&isc->subdev_entities)) {
+		dev_err(dev, "no subdev found\n");
+		ret = -ENODEV;
+		goto unregister_v4l2_device;
+	}
+
+	list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
+		struct v4l2_async_connection *asd;
+		struct fwnode_handle *fwnode =
+			of_fwnode_handle(subdev_entity->epn);
+
+		v4l2_async_nf_init(&subdev_entity->notifier, &isc->v4l2_dev);
+
+		asd = v4l2_async_nf_add_fwnode_remote(&subdev_entity->notifier,
+						      fwnode,
+						      struct v4l2_async_connection);
+
+		of_node_put(subdev_entity->epn);
+		subdev_entity->epn = NULL;
+
+		if (IS_ERR(asd)) {
+			ret = PTR_ERR(asd);
+			goto cleanup_subdev;
+		}
+
+		subdev_entity->notifier.ops = &atmel_isc_async_ops;
+
+		ret = v4l2_async_nf_register(&subdev_entity->notifier);
+		if (ret) {
+			dev_err(dev, "fail to register async notifier\n");
+			goto cleanup_subdev;
+		}
+
+		if (video_is_registered(&isc->video_dev))
+			break;
+	}
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_request_idle(dev);
+
+	regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver);
+	dev_info(dev, "Microchip XISC version %x\n", ver);
+
+	return 0;
+
+cleanup_subdev:
+	atmel_isc_subdev_cleanup(isc);
+
+unregister_v4l2_device:
+	v4l2_device_unregister(&isc->v4l2_dev);
+
+unprepare_hclk:
+	clk_disable_unprepare(isc->hclock);
+
+	atmel_isc_clk_cleanup(isc);
+
+	return ret;
+}
+
+static void microchip_xisc_remove(struct platform_device *pdev)
+{
+	struct isc_device *isc = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(&pdev->dev);
+
+	atmel_isc_subdev_cleanup(isc);
+
+	v4l2_device_unregister(&isc->v4l2_dev);
+
+	clk_disable_unprepare(isc->hclock);
+
+	atmel_isc_clk_cleanup(isc);
+}
+
+static int __maybe_unused xisc_runtime_suspend(struct device *dev)
+{
+	struct isc_device *isc = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(isc->hclock);
+
+	return 0;
+}
+
+static int __maybe_unused xisc_runtime_resume(struct device *dev)
+{
+	struct isc_device *isc = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(isc->hclock);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
+static const struct dev_pm_ops microchip_xisc_dev_pm_ops = {
+	SET_RUNTIME_PM_OPS(xisc_runtime_suspend, xisc_runtime_resume, NULL)
+};
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id microchip_xisc_of_match[] = {
+	{ .compatible = "microchip,sama7g5-isc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, microchip_xisc_of_match);
+#endif
+
+static struct platform_driver microchip_xisc_driver = {
+	.probe	= microchip_xisc_probe,
+	.remove_new = microchip_xisc_remove,
+	.driver	= {
+		.name		= "microchip-sama7g5-xisc",
+		.pm		= &microchip_xisc_dev_pm_ops,
+		.of_match_table = of_match_ptr(microchip_xisc_of_match),
+	},
+};
+
+module_platform_driver(microchip_xisc_driver);
+
+MODULE_AUTHOR("Eugen Hristev <eugen.hristev@microchip.com>");
+MODULE_DESCRIPTION("The V4L2 driver for Microchip-XISC");
+MODULE_LICENSE("GPL v2");