[media] davinci: vpfe: dm365: resizer driver based on media framework

Add the video resizer driver with the v4l2 media controller framework
which takes care of resizing the video frames with both up-scaling
downscaling facility. The driver supports both continuous and
single shot operations.The driver supports resizer as a subdevice
and a media entity. It has support for 2 resizers - resizerA
and resizerB.
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/media/davinci_vpfe/dm365_resizer.c

+/*
+ * Copyright (C) 2012 Texas Instruments Inc
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ * Contributors:
+ *      Manjunath Hadli <manjunath.hadli@ti.com>
+ *      Prabhakar Lad <prabhakar.lad@ti.com>
+ *
+ *
+ * Resizer allows upscaling or downscaling a image to a desired
+ * resolution. There are 2 resizer modules. both operating on the
+ * same input image, but can have different output resolution.
+ */
+
+#include "dm365_ipipe_hw.h"
+#include "dm365_resizer.h"
+
+#define MIN_IN_WIDTH		32
+#define MIN_IN_HEIGHT		32
+#define MAX_IN_WIDTH		4095
+#define MAX_IN_HEIGHT		4095
+#define MIN_OUT_WIDTH		16
+#define MIN_OUT_HEIGHT		2
+
+static const unsigned int resizer_input_formats[] = {
+	V4L2_MBUS_FMT_UYVY8_2X8,
+	V4L2_MBUS_FMT_Y8_1X8,
+	V4L2_MBUS_FMT_UV8_1X8,
+	V4L2_MBUS_FMT_SGRBG12_1X12,
+};
+
+static const unsigned int resizer_output_formats[] = {
+	V4L2_MBUS_FMT_UYVY8_2X8,
+	V4L2_MBUS_FMT_Y8_1X8,
+	V4L2_MBUS_FMT_UV8_1X8,
+	V4L2_MBUS_FMT_YDYUYDYV8_1X16,
+	V4L2_MBUS_FMT_SGRBG12_1X12,
+};
+
+/* resizer_calculate_line_length() - This function calculates the line length of
+ *				     various image planes at the input and
+ *				     output.
+ */
+static void
+resizer_calculate_line_length(enum v4l2_mbus_pixelcode pix, int width,
+		      int height, int *line_len, int *line_len_c)
+{
+	*line_len = 0;
+	*line_len_c = 0;
+
+	if (pix == V4L2_MBUS_FMT_UYVY8_2X8 ||
+	    pix == V4L2_MBUS_FMT_SGRBG12_1X12) {
+		*line_len = width << 1;
+	} else if (pix == V4L2_MBUS_FMT_Y8_1X8 ||
+		   pix == V4L2_MBUS_FMT_UV8_1X8) {
+		*line_len = width;
+		*line_len_c = width;
+	} else {
+		/* YUV 420 */
+		/* round width to upper 32 byte boundary */
+		*line_len = width;
+		*line_len_c = width;
+	}
+	/* adjust the line len to be a multiple of 32 */
+	*line_len += 31;
+	*line_len &= ~0x1f;
+	*line_len_c += 31;
+	*line_len_c &= ~0x1f;
+}
+
+static inline int
+resizer_validate_output_image_format(struct device *dev,
+				     struct v4l2_mbus_framefmt *format,
+				     int *in_line_len, int *in_line_len_c)
+{
+	if (format->code != V4L2_MBUS_FMT_UYVY8_2X8 &&
+	    format->code != V4L2_MBUS_FMT_Y8_1X8 &&
+	    format->code != V4L2_MBUS_FMT_UV8_1X8 &&
+	    format->code != V4L2_MBUS_FMT_YDYUYDYV8_1X16 &&
+	    format->code != V4L2_MBUS_FMT_SGRBG12_1X12) {
+		dev_err(dev, "Invalid Mbus format, %d\n", format->code);
+		return -EINVAL;
+	}
+	if (!format->width || !format->height) {
+		dev_err(dev, "invalid width or height\n");
+		return -EINVAL;
+	}
+	resizer_calculate_line_length(format->code, format->width,
+		format->height, in_line_len, in_line_len_c);
+	return 0;
+}
+
+static void
+resizer_configure_passthru(struct vpfe_resizer_device *resizer, int bypass)
+{
+	struct resizer_params *param = &resizer->config;
+
+	param->rsz_rsc_param[RSZ_A].cen = DISABLE;
+	param->rsz_rsc_param[RSZ_A].yen = DISABLE;
+	param->rsz_rsc_param[RSZ_A].v_phs_y = 0;
+	param->rsz_rsc_param[RSZ_A].v_phs_c = 0;
+	param->rsz_rsc_param[RSZ_A].v_dif = 256;
+	param->rsz_rsc_param[RSZ_A].v_lpf_int_y = 0;
+	param->rsz_rsc_param[RSZ_A].v_lpf_int_c = 0;
+	param->rsz_rsc_param[RSZ_A].h_phs = 0;
+	param->rsz_rsc_param[RSZ_A].h_dif = 256;
+	param->rsz_rsc_param[RSZ_A].h_lpf_int_y = 0;
+	param->rsz_rsc_param[RSZ_A].h_lpf_int_c = 0;
+	param->rsz_rsc_param[RSZ_A].dscale_en = DISABLE;
+	param->rsz2rgb[RSZ_A].rgb_en = DISABLE;
+	param->rsz_en[RSZ_A] = ENABLE;
+	param->rsz_en[RSZ_B] = DISABLE;
+	if (bypass) {
+		param->rsz_rsc_param[RSZ_A].i_vps = 0;
+		param->rsz_rsc_param[RSZ_A].i_hps = 0;
+		/* Raw Bypass */
+		param->rsz_common.passthrough = BYPASS_ON;
+	}
+}
+
+static void
+configure_resizer_out_params(struct vpfe_resizer_device *resizer, int index,
+			     void *output_spec, unsigned char partial,
+			     unsigned flag)
+{
+	struct resizer_params *param = &resizer->config;
+	struct v4l2_mbus_framefmt *outformat;
+	struct vpfe_rsz_output_spec *output;
+
+	if (index == RSZ_A &&
+	    resizer->resizer_a.output == RESIZER_OUTPUT_NONE) {
+		param->rsz_en[index] = DISABLE;
+		return;
+	}
+	if (index == RSZ_B &&
+	    resizer->resizer_b.output == RESIZER_OUTPUT_NONE) {
+		param->rsz_en[index] = DISABLE;
+		return;
+	}
+	output = (struct vpfe_rsz_output_spec *)output_spec;
+	param->rsz_en[index] = ENABLE;
+	if (partial) {
+		param->rsz_rsc_param[index].h_flip = output->h_flip;
+		param->rsz_rsc_param[index].v_flip = output->v_flip;
+		param->rsz_rsc_param[index].v_typ_y = output->v_typ_y;
+		param->rsz_rsc_param[index].v_typ_c = output->v_typ_c;
+		param->rsz_rsc_param[index].v_lpf_int_y =
+						output->v_lpf_int_y;
+		param->rsz_rsc_param[index].v_lpf_int_c =
+						output->v_lpf_int_c;
+		param->rsz_rsc_param[index].h_typ_y = output->h_typ_y;
+		param->rsz_rsc_param[index].h_typ_c = output->h_typ_c;
+		param->rsz_rsc_param[index].h_lpf_int_y =
+						output->h_lpf_int_y;
+		param->rsz_rsc_param[index].h_lpf_int_c =
+						output->h_lpf_int_c;
+		param->rsz_rsc_param[index].dscale_en =
+						output->en_down_scale;
+		param->rsz_rsc_param[index].h_dscale_ave_sz =
+						output->h_dscale_ave_sz;
+		param->rsz_rsc_param[index].v_dscale_ave_sz =
+						output->v_dscale_ave_sz;
+		param->ext_mem_param[index].user_y_ofst =
+				    (output->user_y_ofst + 31) & ~0x1f;
+		param->ext_mem_param[index].user_c_ofst =
+				    (output->user_c_ofst + 31) & ~0x1f;
+		return;
+	}
+
+	if (index == RSZ_A)
+		outformat = &resizer->resizer_a.formats[RESIZER_PAD_SOURCE];
+	else
+		outformat = &resizer->resizer_b.formats[RESIZER_PAD_SOURCE];
+	param->rsz_rsc_param[index].o_vsz = outformat->height - 1;
+	param->rsz_rsc_param[index].o_hsz = outformat->width - 1;
+	param->ext_mem_param[index].rsz_sdr_ptr_s_y = output->vst_y;
+	param->ext_mem_param[index].rsz_sdr_ptr_e_y = outformat->height;
+	param->ext_mem_param[index].rsz_sdr_ptr_s_c = output->vst_c;
+	param->ext_mem_param[index].rsz_sdr_ptr_e_c = outformat->height;
+
+	if (!flag)
+		return;
+	/* update common parameters */
+	param->rsz_rsc_param[index].h_flip = output->h_flip;
+	param->rsz_rsc_param[index].v_flip = output->v_flip;
+	param->rsz_rsc_param[index].v_typ_y = output->v_typ_y;
+	param->rsz_rsc_param[index].v_typ_c = output->v_typ_c;
+	param->rsz_rsc_param[index].v_lpf_int_y = output->v_lpf_int_y;
+	param->rsz_rsc_param[index].v_lpf_int_c = output->v_lpf_int_c;
+	param->rsz_rsc_param[index].h_typ_y = output->h_typ_y;
+	param->rsz_rsc_param[index].h_typ_c = output->h_typ_c;
+	param->rsz_rsc_param[index].h_lpf_int_y = output->h_lpf_int_y;
+	param->rsz_rsc_param[index].h_lpf_int_c = output->h_lpf_int_c;
+	param->rsz_rsc_param[index].dscale_en = output->en_down_scale;
+	param->rsz_rsc_param[index].h_dscale_ave_sz = output->h_dscale_ave_sz;
+	param->rsz_rsc_param[index].v_dscale_ave_sz = output->h_dscale_ave_sz;
+	param->ext_mem_param[index].user_y_ofst =
+					(output->user_y_ofst + 31) & ~0x1f;
+	param->ext_mem_param[index].user_c_ofst =
+					(output->user_c_ofst + 31) & ~0x1f;
+}
+
+/*
+ * resizer_calculate_resize_ratios() - Calculates resize ratio for resizer
+ *				      A or B. This is called after setting
+ *				     the input size or output size.
+ * @resizer: Pointer to VPFE resizer subdevice.
+ * @index: index RSZ_A-resizer-A RSZ_B-resizer-B.
+ */
+void
+resizer_calculate_resize_ratios(struct vpfe_resizer_device *resizer, int index)
+{
+	struct resizer_params *param = &resizer->config;
+	struct v4l2_mbus_framefmt *informat, *outformat;
+
+	informat = &resizer->crop_resizer.formats[RESIZER_CROP_PAD_SINK];
+
+	if (index == RSZ_A)
+		outformat = &resizer->resizer_a.formats[RESIZER_PAD_SOURCE];
+	else
+		outformat = &resizer->resizer_b.formats[RESIZER_PAD_SOURCE];
+
+	if (outformat->field != V4L2_FIELD_INTERLACED)
+		param->rsz_rsc_param[index].v_dif =
+			((informat->height) * 256) / (outformat->height);
+	else
+		param->rsz_rsc_param[index].v_dif =
+			((informat->height >> 1) * 256) / (outformat->height);
+	param->rsz_rsc_param[index].h_dif =
+			((informat->width) * 256) / (outformat->width);
+}
+
+void
+static resizer_enable_422_420_conversion(struct resizer_params *param,
+					 int index, bool en)
+{
+	param->rsz_rsc_param[index].cen = en;
+	param->rsz_rsc_param[index].yen = en;
+}
+
+/* resizer_calculate_sdram_offsets() - This function calculates the offsets from
+ *				       start of buffer for the C plane when
+ *				       output format is YUV420SP. It also
+ *				       calculates the offsets from the start of
+ *				       the buffer when the image is flipped
+ *				       vertically or horizontally for ycbcr/y/c
+ *				       planes.
+ * @resizer: Pointer to resizer subdevice.
+ * @index: index RSZ_A-resizer-A RSZ_B-resizer-B.
+ */
+static int
+resizer_calculate_sdram_offsets(struct vpfe_resizer_device *resizer, int index)
+{
+	struct resizer_params *param = &resizer->config;
+	struct v4l2_mbus_framefmt *outformat;
+	int bytesperpixel = 2;
+	int image_height;
+	int image_width;
+	int yuv_420 = 0;
+	int offset = 0;
+
+	if (index == RSZ_A)
+		outformat = &resizer->resizer_a.formats[RESIZER_PAD_SOURCE];
+	else
+		outformat = &resizer->resizer_b.formats[RESIZER_PAD_SOURCE];
+
+	image_height = outformat->height + 1;
+	image_width = outformat->width + 1;
+	param->ext_mem_param[index].c_offset = 0;
+	param->ext_mem_param[index].flip_ofst_y = 0;
+	param->ext_mem_param[index].flip_ofst_c = 0;
+	if (outformat->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16) {
+		/* YUV 420 */
+		yuv_420 = 1;
+		bytesperpixel = 1;
+	}
+
+	if (param->rsz_rsc_param[index].h_flip)
+		/* width * bytesperpixel - 1 */
+		offset = (image_width * bytesperpixel) - 1;
+	if (param->rsz_rsc_param[index].v_flip)
+		offset += (image_height - 1) *
+			param->ext_mem_param[index].rsz_sdr_oft_y;
+	param->ext_mem_param[index].flip_ofst_y = offset;
+	if (!yuv_420)
+		return 0;
+	offset = 0;
+	/* half height for c-plane */
+	if (param->rsz_rsc_param[index].h_flip)
+		/* width * bytesperpixel - 1 */
+		offset = image_width - 1;
+	if (param->rsz_rsc_param[index].v_flip)
+		offset += (((image_height >> 1) - 1) *
+			   param->ext_mem_param[index].rsz_sdr_oft_c);
+	param->ext_mem_param[index].flip_ofst_c = offset;
+	param->ext_mem_param[index].c_offset =
+		      param->ext_mem_param[index].rsz_sdr_oft_y * image_height;
+	return 0;
+}
+
+int resizer_configure_output_win(struct vpfe_resizer_device *resizer)
+{
+	struct resizer_params *param = &resizer->config;
+	struct vpfe_rsz_output_spec output_specs;
+	struct v4l2_mbus_framefmt *outformat;
+	int line_len_c;
+	int line_len;
+	int ret;
+
+	outformat = &resizer->resizer_a.formats[RESIZER_PAD_SOURCE];
+
+	output_specs.vst_y = param->user_config.vst;
+	if (outformat->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+		output_specs.vst_c = param->user_config.vst;
+
+	configure_resizer_out_params(resizer, RSZ_A, &output_specs, 0, 0);
+	resizer_calculate_line_length(outformat->code,
+				      param->rsz_rsc_param[0].o_hsz + 1,
+				      param->rsz_rsc_param[0].o_vsz + 1,
+				      &line_len, &line_len_c);
+	param->ext_mem_param[0].rsz_sdr_oft_y = line_len;
+	param->ext_mem_param[0].rsz_sdr_oft_c = line_len_c;
+	resizer_calculate_resize_ratios(resizer, RSZ_A);
+	if (param->rsz_en[RSZ_B])
+		resizer_calculate_resize_ratios(resizer, RSZ_B);
+
+	if (outformat->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+		resizer_enable_422_420_conversion(param, RSZ_A, ENABLE);
+	else
+		resizer_enable_422_420_conversion(param, RSZ_A, DISABLE);
+
+	ret = resizer_calculate_sdram_offsets(resizer, RSZ_A);
+	if (!ret && param->rsz_en[RSZ_B])
+		ret = resizer_calculate_sdram_offsets(resizer, RSZ_B);
+
+	if (ret)
+		pr_err("Error in calculating sdram offsets\n");
+	return ret;
+}
+
+static int
+resizer_calculate_down_scale_f_div_param(struct device *dev,
+					 int input_width, int output_width,
+					 struct resizer_scale_param *param)
+{
+	/* rsz = R, input_width = H, output width = h in the equation */
+	unsigned int two_power;
+	unsigned int upper_h1;
+	unsigned int upper_h2;
+	unsigned int val1;
+	unsigned int val;
+	unsigned int rsz;
+	unsigned int h1;
+	unsigned int h2;
+	unsigned int o;
+	unsigned int n;
+
+	upper_h1 = input_width >> 1;
+	n = param->h_dscale_ave_sz;
+	/* 2 ^ (scale+1) */
+	two_power = 1 << (n + 1);
+	upper_h1 = (upper_h1 >> (n + 1)) << (n + 1);
+	upper_h2 = input_width - upper_h1;
+	if (upper_h2 % two_power) {
+		dev_err(dev, "frame halves to be a multiple of 2 power n+1\n");
+		return -EINVAL;
+	}
+	two_power = 1 << n;
+	rsz = (input_width << 8) / output_width;
+	val = rsz * two_power;
+	val = ((upper_h1 << 8) / val) + 1;
+	if (!(val % 2)) {
+		h1 = val;
+	} else {
+		val = upper_h1 << 8;
+		val >>= n + 1;
+		val -= rsz >> 1;
+		val /= rsz << 1;
+		val <<= 1;
+		val += 2;
+		h1 = val;
+	}
+	o = 10 + (two_power << 2);
+	if (((input_width << 7) / rsz) % 2)
+		o += (((CEIL(rsz, 1024)) << 1) << n);
+	h2 = output_width - h1;
+	/* phi */
+	val = (h1 * rsz) - (((upper_h1 - (o - 10)) / two_power) << 8);
+	/* skip */
+	val1 = ((val - 1024) >> 9) << 1;
+	param->f_div.num_passes = MAX_PASSES;
+	param->f_div.pass[0].o_hsz = h1 - 1;
+	param->f_div.pass[0].i_hps = 0;
+	param->f_div.pass[0].h_phs = 0;
+	param->f_div.pass[0].src_hps = 0;
+	param->f_div.pass[0].src_hsz = upper_h1 + o;
+	param->f_div.pass[1].o_hsz = h2 - 1;
+	param->f_div.pass[1].i_hps = 10 + (val1 * two_power);
+	param->f_div.pass[1].h_phs = (val - (val1 << 8));
+	param->f_div.pass[1].src_hps = upper_h1 - o;
+	param->f_div.pass[1].src_hsz = upper_h2 + o;
+
+	return 0;
+}
+
+static int
+resizer_configure_common_in_params(struct vpfe_resizer_device *resizer)
+{
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	struct resizer_params *param = &resizer->config;
+	struct vpfe_rsz_config_params *user_config;
+	struct v4l2_mbus_framefmt *informat;
+
+	informat = &resizer->crop_resizer.formats[RESIZER_CROP_PAD_SINK];
+	user_config = &resizer->config.user_config;
+	param->rsz_common.vps = param->user_config.vst;
+	param->rsz_common.hps = param->user_config.hst;
+
+	if (vpfe_ipipeif_decimation_enabled(vpfe_dev))
+		param->rsz_common.hsz = (((informat->width - 1) *
+			IPIPEIF_RSZ_CONST) / vpfe_ipipeif_get_rsz(vpfe_dev));
+	else
+		param->rsz_common.hsz = informat->width - 1;
+
+	if (informat->field == V4L2_FIELD_INTERLACED)
+		param->rsz_common.vsz  = (informat->height - 1) >> 1;
+	else
+		param->rsz_common.vsz  = informat->height - 1;
+
+	param->rsz_common.raw_flip = 0;
+
+	if (resizer->crop_resizer.input == RESIZER_CROP_INPUT_IPIPEIF)
+		param->rsz_common.source = IPIPEIF_DATA;
+	else
+		param->rsz_common.source = IPIPE_DATA;
+
+	switch (informat->code) {
+	case V4L2_MBUS_FMT_UYVY8_2X8:
+		param->rsz_common.src_img_fmt = RSZ_IMG_422;
+		param->rsz_common.raw_flip = 0;
+		break;
+
+	case V4L2_MBUS_FMT_Y8_1X8:
+		param->rsz_common.src_img_fmt = RSZ_IMG_420;
+		/* Select y */
+		param->rsz_common.y_c = 0;
+		param->rsz_common.raw_flip = 0;
+		break;
+
+	case V4L2_MBUS_FMT_UV8_1X8:
+		param->rsz_common.src_img_fmt = RSZ_IMG_420;
+		/* Select y */
+		param->rsz_common.y_c = 1;
+		param->rsz_common.raw_flip = 0;
+		break;
+
+	case V4L2_MBUS_FMT_SGRBG12_1X12:
+		param->rsz_common.raw_flip = 1;
+		break;
+
+	default:
+		param->rsz_common.src_img_fmt = RSZ_IMG_422;
+		param->rsz_common.source = IPIPE_DATA;
+	}
+
+	param->rsz_common.yuv_y_min = user_config->yuv_y_min;
+	param->rsz_common.yuv_y_max = user_config->yuv_y_max;
+	param->rsz_common.yuv_c_min = user_config->yuv_c_min;
+	param->rsz_common.yuv_c_max = user_config->yuv_c_max;
+	param->rsz_common.out_chr_pos = user_config->out_chr_pos;
+	param->rsz_common.rsz_seq_crv = user_config->chroma_sample_even;
+
+	return 0;
+}
+static int
+resizer_configure_in_continious_mode(struct vpfe_resizer_device *resizer)
+{
+	struct device *dev = resizer->crop_resizer.subdev.v4l2_dev->dev;
+	struct resizer_params *param = &resizer->config;
+	struct vpfe_rsz_config_params *cont_config;
+	int line_len_c;
+	int line_len;
+	int ret;
+
+	if (resizer->resizer_a.output != RESIZER_OUPUT_MEMORY) {
+		dev_err(dev, "enable resizer - Resizer-A\n");
+		return -EINVAL;
+	}
+
+	cont_config = &resizer->config.user_config;
+	param->rsz_en[RSZ_A] = ENABLE;
+	configure_resizer_out_params(resizer, RSZ_A,
+				     &cont_config->output1, 1, 0);
+	param->rsz_en[RSZ_B] = DISABLE;
+	param->oper_mode = RESIZER_MODE_CONTINIOUS;
+
+	if (resizer->resizer_b.output == RESIZER_OUPUT_MEMORY) {
+		struct v4l2_mbus_framefmt *outformat2;
+
+		param->rsz_en[RSZ_B] = ENABLE;
+		outformat2 = &resizer->resizer_b.formats[RESIZER_PAD_SOURCE];
+		ret = resizer_validate_output_image_format(dev, outformat2,
+				&line_len, &line_len_c);
+		if (ret)
+			return ret;
+		param->ext_mem_param[RSZ_B].rsz_sdr_oft_y = line_len;
+		param->ext_mem_param[RSZ_B].rsz_sdr_oft_c = line_len_c;
+		configure_resizer_out_params(resizer, RSZ_B,
+						&cont_config->output2, 0, 1);
+		if (outformat2->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+			resizer_enable_422_420_conversion(param,
+							  RSZ_B, ENABLE);
+		else
+			resizer_enable_422_420_conversion(param,
+							  RSZ_B, DISABLE);
+	}
+	resizer_configure_common_in_params(resizer);
+	ret = resizer_configure_output_win(resizer);
+	if (ret)
+		return ret;
+
+	param->rsz_common.passthrough = cont_config->bypass;
+	if (cont_config->bypass)
+		resizer_configure_passthru(resizer, 1);
+
+	return 0;
+}
+
+static inline int
+resizer_validate_input_image_format(struct device *dev,
+				    enum v4l2_mbus_pixelcode pix,
+				    int width, int height, int *line_len)
+{
+	int val;
+
+	if (pix != V4L2_MBUS_FMT_UYVY8_2X8 &&
+	    pix != V4L2_MBUS_FMT_Y8_1X8 &&
+	    pix != V4L2_MBUS_FMT_UV8_1X8 &&
+	    pix != V4L2_MBUS_FMT_SGRBG12_1X12) {
+		dev_err(dev,
+		"resizer validate output: pix format not supported, %d\n", pix);
+		return -EINVAL;
+	}
+
+	if (!width || !height) {
+		dev_err(dev,
+			"resizer validate input: invalid width or height\n");
+		return -EINVAL;
+	}
+
+	if (pix == V4L2_MBUS_FMT_UV8_1X8)
+		resizer_calculate_line_length(pix, width,
+					      height, &val, line_len);
+	else
+		resizer_calculate_line_length(pix, width,
+					      height, line_len, &val);
+
+	return 0;
+}
+
+static int
+resizer_validate_decimation(struct device *dev, enum ipipeif_decimation dec_en,
+			    unsigned char rsz, unsigned char frame_div_mode_en,
+			    int width)
+{
+	if (dec_en && frame_div_mode_en) {
+		dev_err(dev,
+		 "dec_en & frame_div_mode_en can not enabled simultaneously\n");
+		return -EINVAL;
+	}
+
+	if (frame_div_mode_en) {
+		dev_err(dev, "frame_div_mode mode not supported\n");
+		return -EINVAL;
+	}
+
+	if (!dec_en)
+		return 0;
+
+	if (width <= VPFE_IPIPE_MAX_INPUT_WIDTH) {
+		dev_err(dev,
+			"image width to be more than %d for decimation\n",
+			VPFE_IPIPE_MAX_INPUT_WIDTH);
+		return -EINVAL;
+	}
+
+	if (rsz < IPIPEIF_RSZ_MIN || rsz > IPIPEIF_RSZ_MAX) {
+		dev_err(dev, "rsz range is %d to %d\n",
+			IPIPEIF_RSZ_MIN, IPIPEIF_RSZ_MAX);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* resizer_calculate_normal_f_div_param() - Algorithm to calculate the frame
+ *					    division parameters for resizer.
+ *					    in normal mode.
+ */
+static int
+resizer_calculate_normal_f_div_param(struct device *dev, int input_width,
+		int output_width, struct resizer_scale_param *param)
+{
+	/* rsz = R, input_width = H, output width = h in the equation */
+	unsigned int val1;
+	unsigned int rsz;
+	unsigned int val;
+	unsigned int h1;
+	unsigned int h2;
+	unsigned int o;
+
+	if (output_width > input_width) {
+		dev_err(dev, "frame div mode is used for scale down only\n");
+		return -EINVAL;
+	}
+
+	rsz = (input_width << 8) / output_width;
+	val = rsz << 1;
+	val = ((input_width << 8) / val) + 1;
+	o = 14;
+	if (!(val % 2)) {
+		h1 = val;
+	} else {
+		val = (input_width << 7);
+		val -= rsz >> 1;
+		val /= rsz << 1;
+		val <<= 1;
+		val += 2;
+		o += ((CEIL(rsz, 1024)) << 1);
+		h1 = val;
+	}
+	h2 = output_width - h1;
+	/* phi */
+	val = (h1 * rsz) - (((input_width >> 1) - o) << 8);
+	/* skip */
+	val1 = ((val - 1024) >> 9) << 1;
+	param->f_div.num_passes = MAX_PASSES;
+	param->f_div.pass[0].o_hsz = h1 - 1;
+	param->f_div.pass[0].i_hps = 0;
+	param->f_div.pass[0].h_phs = 0;
+	param->f_div.pass[0].src_hps = 0;
+	param->f_div.pass[0].src_hsz = (input_width >> 2) + o;
+	param->f_div.pass[1].o_hsz = h2 - 1;
+	param->f_div.pass[1].i_hps = val1;
+	param->f_div.pass[1].h_phs = (val - (val1 << 8));
+	param->f_div.pass[1].src_hps = (input_width >> 2) - o;
+	param->f_div.pass[1].src_hsz = (input_width >> 2) + o;
+
+	return 0;
+}
+
+static int
+resizer_configure_in_single_shot_mode(struct vpfe_resizer_device *resizer)
+{
+	struct vpfe_rsz_config_params *config = &resizer->config.user_config;
+	struct device *dev = resizer->crop_resizer.subdev.v4l2_dev->dev;
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	struct v4l2_mbus_framefmt *outformat1, *outformat2;
+	struct resizer_params *param = &resizer->config;
+	struct v4l2_mbus_framefmt *informat;
+	int decimation;
+	int line_len_c;
+	int line_len;
+	int rsz;
+	int ret;
+
+	informat = &resizer->crop_resizer.formats[RESIZER_CROP_PAD_SINK];
+	outformat1 = &resizer->resizer_a.formats[RESIZER_PAD_SOURCE];
+	outformat2 = &resizer->resizer_b.formats[RESIZER_PAD_SOURCE];
+
+	decimation = vpfe_ipipeif_decimation_enabled(vpfe_dev);
+	rsz = vpfe_ipipeif_get_rsz(vpfe_dev);
+	if (decimation && param->user_config.frame_div_mode_en) {
+		dev_err(dev,
+		"dec_en & frame_div_mode_en cannot enabled simultaneously\n");
+		return -EINVAL;
+	}
+
+	ret = resizer_validate_decimation(dev, decimation, rsz,
+	      param->user_config.frame_div_mode_en, informat->width);
+	if (ret)
+		return -EINVAL;
+
+	ret = resizer_validate_input_image_format(dev, informat->code,
+		informat->width, informat->height, &line_len);
+	if (ret)
+		return -EINVAL;
+
+	if (resizer->resizer_a.output != RESIZER_OUTPUT_NONE) {
+		param->rsz_en[RSZ_A] = ENABLE;
+		ret = resizer_validate_output_image_format(dev, outformat1,
+					&line_len, &line_len_c);
+		if (ret)
+			return ret;
+		param->ext_mem_param[RSZ_A].rsz_sdr_oft_y = line_len;
+		param->ext_mem_param[RSZ_A].rsz_sdr_oft_c = line_len_c;
+		configure_resizer_out_params(resizer, RSZ_A,
+					&param->user_config.output1, 0, 1);
+
+		if (outformat1->code == V4L2_MBUS_FMT_SGRBG12_1X12)
+			param->rsz_common.raw_flip = 1;
+		else
+			param->rsz_common.raw_flip = 0;
+
+		if (outformat1->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+			resizer_enable_422_420_conversion(param,
+							  RSZ_A, ENABLE);
+		else
+			resizer_enable_422_420_conversion(param,
+							  RSZ_A, DISABLE);
+	}
+
+	if (resizer->resizer_b.output != RESIZER_OUTPUT_NONE) {
+		param->rsz_en[RSZ_B] = ENABLE;
+		ret = resizer_validate_output_image_format(dev, outformat2,
+				&line_len, &line_len_c);
+		if (ret)
+			return ret;
+		param->ext_mem_param[RSZ_B].rsz_sdr_oft_y = line_len;
+		param->ext_mem_param[RSZ_B].rsz_sdr_oft_c = line_len_c;
+		configure_resizer_out_params(resizer, RSZ_B,
+					&param->user_config.output2, 0, 1);
+		if (outformat2->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+			resizer_enable_422_420_conversion(param,
+							  RSZ_B, ENABLE);
+		else
+			resizer_enable_422_420_conversion(param,
+							  RSZ_B, DISABLE);
+	}
+
+	resizer_configure_common_in_params(resizer);
+	if (resizer->resizer_a.output != RESIZER_OUTPUT_NONE) {
+		resizer_calculate_resize_ratios(resizer, RSZ_A);
+		resizer_calculate_sdram_offsets(resizer, RSZ_A);
+		/* Overriding resize ratio calculation */
+		if (informat->code == V4L2_MBUS_FMT_UV8_1X8) {
+			param->rsz_rsc_param[RSZ_A].v_dif =
+				(((informat->height + 1) * 2) * 256) /
+				(param->rsz_rsc_param[RSZ_A].o_vsz + 1);
+		}
+	}
+
+	if (resizer->resizer_b.output != RESIZER_OUTPUT_NONE) {
+		resizer_calculate_resize_ratios(resizer, RSZ_B);
+		resizer_calculate_sdram_offsets(resizer, RSZ_B);
+		/* Overriding resize ratio calculation */
+		if (informat->code == V4L2_MBUS_FMT_UV8_1X8) {
+			param->rsz_rsc_param[RSZ_B].v_dif =
+				(((informat->height + 1) * 2) * 256) /
+				(param->rsz_rsc_param[RSZ_B].o_vsz + 1);
+		}
+	}
+	if (param->user_config.frame_div_mode_en &&
+		param->rsz_en[RSZ_A]) {
+		if (!param->rsz_rsc_param[RSZ_A].dscale_en)
+			ret = resizer_calculate_normal_f_div_param(dev,
+			      informat->width,
+			      param->rsz_rsc_param[RSZ_A].o_vsz + 1,
+			      &param->rsz_rsc_param[RSZ_A]);
+		else
+			ret = resizer_calculate_down_scale_f_div_param(dev,
+			      informat->width,
+			      param->rsz_rsc_param[RSZ_A].o_vsz + 1,
+			      &param->rsz_rsc_param[RSZ_A]);
+		if (ret)
+			return -EINVAL;
+	}
+	if (param->user_config.frame_div_mode_en &&
+		param->rsz_en[RSZ_B]) {
+		if (!param->rsz_rsc_param[RSZ_B].dscale_en)
+			ret = resizer_calculate_normal_f_div_param(dev,
+			      informat->width,
+			      param->rsz_rsc_param[RSZ_B].o_vsz + 1,
+			      &param->rsz_rsc_param[RSZ_B]);
+		else
+			ret = resizer_calculate_down_scale_f_div_param(dev,
+			      informat->width,
+			      param->rsz_rsc_param[RSZ_B].o_vsz + 1,
+			      &param->rsz_rsc_param[RSZ_B]);
+		if (ret)
+			return -EINVAL;
+	}
+	param->rsz_common.passthrough = config->bypass;
+	if (config->bypass)
+		resizer_configure_passthru(resizer, 1);
+	return 0;
+}
+
+static void
+resizer_set_defualt_configuration(struct vpfe_resizer_device *resizer)
+{
+#define  WIDTH_I 640
+#define  HEIGHT_I 480
+#define  WIDTH_O 640
+#define  HEIGHT_O 480
+	const struct resizer_params rsz_default_config = {
+		.oper_mode = RESIZER_MODE_ONE_SHOT,
+		.rsz_common = {
+			.vsz = HEIGHT_I - 1,
+			.hsz = WIDTH_I - 1,
+			.src_img_fmt = RSZ_IMG_422,
+			.raw_flip = 1,	/* flip preserve Raw format */
+			.source = IPIPE_DATA,
+			.passthrough = BYPASS_OFF,
+			.yuv_y_max = 255,
+			.yuv_c_max = 255,
+			.rsz_seq_crv = DISABLE,
+			.out_chr_pos = VPFE_IPIPE_YUV422_CHR_POS_COSITE,
+		},
+		.rsz_rsc_param = {
+			{
+				.h_flip = DISABLE,
+				.v_flip = DISABLE,
+				.cen = DISABLE,
+				.yen = DISABLE,
+				.o_vsz = HEIGHT_O - 1,
+				.o_hsz = WIDTH_O - 1,
+				.v_dif = 256,
+				.v_typ_y = VPFE_RSZ_INTP_CUBIC,
+				.h_typ_c = VPFE_RSZ_INTP_CUBIC,
+				.h_dif = 256,
+				.h_typ_y = VPFE_RSZ_INTP_CUBIC,
+				.h_typ_c = VPFE_RSZ_INTP_CUBIC,
+				.h_dscale_ave_sz =
+					VPFE_IPIPE_DWN_SCALE_1_OVER_2,
+				.v_dscale_ave_sz =
+					VPFE_IPIPE_DWN_SCALE_1_OVER_2,
+			},
+			{
+				.h_flip = DISABLE,
+				.v_flip = DISABLE,
+				.cen = DISABLE,
+				.yen = DISABLE,
+				.o_vsz = HEIGHT_O - 1,
+				.o_hsz = WIDTH_O - 1,
+				.v_dif = 256,
+				.v_typ_y = VPFE_RSZ_INTP_CUBIC,
+				.h_typ_c = VPFE_RSZ_INTP_CUBIC,
+				.h_dif = 256,
+				.h_typ_y = VPFE_RSZ_INTP_CUBIC,
+				.h_typ_c = VPFE_RSZ_INTP_CUBIC,
+				.h_dscale_ave_sz =
+					VPFE_IPIPE_DWN_SCALE_1_OVER_2,
+				.v_dscale_ave_sz =
+					VPFE_IPIPE_DWN_SCALE_1_OVER_2,
+			},
+		},
+		.rsz2rgb = {
+			{
+				.rgb_en = DISABLE
+			},
+			{
+				.rgb_en = DISABLE
+			}
+		},
+		.ext_mem_param = {
+			{
+				.rsz_sdr_oft_y = WIDTH_O << 1,
+				.rsz_sdr_ptr_e_y = HEIGHT_O,
+				.rsz_sdr_oft_c = WIDTH_O,
+				.rsz_sdr_ptr_e_c = HEIGHT_O >> 1,
+			},
+			{
+				.rsz_sdr_oft_y = WIDTH_O << 1,
+				.rsz_sdr_ptr_e_y = HEIGHT_O,
+				.rsz_sdr_oft_c = WIDTH_O,
+				.rsz_sdr_ptr_e_c = HEIGHT_O,
+			},
+		},
+		.rsz_en[0] = ENABLE,
+		.rsz_en[1] = DISABLE,
+		.user_config = {
+			.output1 = {
+				.v_typ_y = VPFE_RSZ_INTP_CUBIC,
+				.v_typ_c = VPFE_RSZ_INTP_CUBIC,
+				.h_typ_y = VPFE_RSZ_INTP_CUBIC,
+				.h_typ_c = VPFE_RSZ_INTP_CUBIC,
+				.h_dscale_ave_sz =
+					VPFE_IPIPE_DWN_SCALE_1_OVER_2,
+				.v_dscale_ave_sz =
+					VPFE_IPIPE_DWN_SCALE_1_OVER_2,
+			},
+			.output2 = {
+				.v_typ_y = VPFE_RSZ_INTP_CUBIC,
+				.v_typ_c = VPFE_RSZ_INTP_CUBIC,
+				.h_typ_y = VPFE_RSZ_INTP_CUBIC,
+				.h_typ_c = VPFE_RSZ_INTP_CUBIC,
+				.h_dscale_ave_sz =
+					VPFE_IPIPE_DWN_SCALE_1_OVER_2,
+				.v_dscale_ave_sz =
+					VPFE_IPIPE_DWN_SCALE_1_OVER_2,
+			},
+			.yuv_y_max = 255,
+			.yuv_c_max = 255,
+			.out_chr_pos = VPFE_IPIPE_YUV422_CHR_POS_COSITE,
+		},
+	};
+	memset(&resizer->config, 0, sizeof(struct resizer_params));
+	memcpy(&resizer->config, &rsz_default_config,
+	       sizeof(struct resizer_params));
+}
+
+/*
+ * resizer_set_configuration() - set resizer config
+ * @resizer: vpfe resizer device pointer.
+ * @chan_config: resizer channel configuration.
+ */
+static int
+resizer_set_configuration(struct vpfe_resizer_device *resizer,
+			  struct vpfe_rsz_config *chan_config)
+{
+	if (!chan_config->config)
+		resizer_set_defualt_configuration(resizer);
+	else
+		if (copy_from_user(&resizer->config.user_config,
+		    chan_config->config, sizeof(struct vpfe_rsz_config_params)))
+			return -EFAULT;
+
+	return 0;
+}
+
+/*
+ * resizer_get_configuration() - get resizer config
+ * @resizer: vpfe resizer device pointer.
+ * @channel: image processor logical channel.
+ * @chan_config: resizer channel configuration.
+ */
+static int
+resizer_get_configuration(struct vpfe_resizer_device *resizer,
+		   struct vpfe_rsz_config *chan_config)
+{
+	struct device *dev = resizer->crop_resizer.subdev.v4l2_dev->dev;
+
+	if (!chan_config->config) {
+		dev_err(dev, "Resizer channel invalid pointer\n");
+		return -EINVAL;
+	}
+
+	if (copy_to_user((void *)chan_config->config,
+	   (void *)&resizer->config.user_config,
+	   sizeof(struct vpfe_rsz_config_params))) {
+		dev_err(dev, "resizer_get_configuration: Error in copy to user\n");
+		return -EFAULT;
+	}
+
+	return 0;
+}
+
+/*
+ * VPFE video operations
+ */
+
+/*
+ * resizer_a_video_out_queue() - RESIZER-A video out queue
+ * @vpfe_dev: vpfe device pointer.
+ * @addr: buffer address.
+ */
+static int resizer_a_video_out_queue(struct vpfe_device *vpfe_dev,
+				     unsigned long addr)
+{
+	struct vpfe_resizer_device *resizer = &vpfe_dev->vpfe_resizer;
+
+	return resizer_set_outaddr(resizer->base_addr,
+				      &resizer->config, RSZ_A, addr);
+}
+
+/*
+ * resizer_b_video_out_queue() - RESIZER-B video out queue
+ * @vpfe_dev: vpfe device pointer.
+ * @addr: buffer address.
+ */
+static int resizer_b_video_out_queue(struct vpfe_device *vpfe_dev,
+				     unsigned long addr)
+{
+	struct vpfe_resizer_device *resizer = &vpfe_dev->vpfe_resizer;
+
+	return resizer_set_outaddr(resizer->base_addr,
+				   &resizer->config, RSZ_B, addr);
+}
+
+static const struct vpfe_video_operations resizer_a_video_ops = {
+	.queue = resizer_a_video_out_queue,
+};
+
+static const struct vpfe_video_operations resizer_b_video_ops = {
+	.queue = resizer_b_video_out_queue,
+};
+
+static void resizer_enable(struct vpfe_resizer_device *resizer, int en)
+{
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	u16 ipipeif_sink = vpfe_dev->vpfe_ipipeif.input;
+	unsigned char val;
+
+	if (resizer->crop_resizer.input == RESIZER_CROP_INPUT_NONE)
+		return;
+
+	if (resizer->crop_resizer.input == RESIZER_CROP_INPUT_IPIPEIF &&
+	   ipipeif_sink == IPIPEIF_INPUT_MEMORY) {
+		do {
+			val = regr_rsz(resizer->base_addr, RSZ_SRC_EN);
+		} while (val);
+
+		if (resizer->resizer_a.output != RESIZER_OUTPUT_NONE) {
+			do {
+				val = regr_rsz(resizer->base_addr, RSZ_A);
+			} while (val);
+		}
+		if (resizer->resizer_b.output != RESIZER_OUTPUT_NONE) {
+			do {
+				val = regr_rsz(resizer->base_addr, RSZ_B);
+			} while (val);
+		}
+	}
+	if (resizer->resizer_a.output != RESIZER_OUTPUT_NONE)
+		rsz_enable(resizer->base_addr, RSZ_A, en);
+
+	if (resizer->resizer_b.output != RESIZER_OUTPUT_NONE)
+		rsz_enable(resizer->base_addr, RSZ_B, en);
+}
+
+
+/*
+ * resizer_ss_isr() - resizer module single-shot buffer scheduling isr
+ * @resizer: vpfe resizer device pointer.
+ */
+static void resizer_ss_isr(struct vpfe_resizer_device *resizer)
+{
+	struct vpfe_video_device *video_out = &resizer->resizer_a.video_out;
+	struct vpfe_video_device *video_out2 = &resizer->resizer_b.video_out;
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	struct vpfe_pipeline *pipe = &video_out->pipe;
+	u16 ipipeif_sink = vpfe_dev->vpfe_ipipeif.input;
+	u32 val;
+
+	if (ipipeif_sink != IPIPEIF_INPUT_MEMORY)
+		return;
+
+	if (resizer->resizer_a.output == RESIZER_OUPUT_MEMORY) {
+		val = vpss_dma_complete_interrupt();
+		if (val != 0 && val != 2)
+			return;
+	}
+
+	if (resizer->resizer_a.output == RESIZER_OUPUT_MEMORY) {
+		spin_lock(&video_out->dma_queue_lock);
+		vpfe_video_process_buffer_complete(video_out);
+		video_out->state = VPFE_VIDEO_BUFFER_NOT_QUEUED;
+		vpfe_video_schedule_next_buffer(video_out);
+		spin_unlock(&video_out->dma_queue_lock);
+	}
+
+	/* If resizer B is enabled */
+	if (pipe->output_num > 1 && resizer->resizer_b.output ==
+	    RESIZER_OUPUT_MEMORY) {
+		spin_lock(&video_out->dma_queue_lock);
+		vpfe_video_process_buffer_complete(video_out2);
+		video_out2->state = VPFE_VIDEO_BUFFER_NOT_QUEUED;
+		vpfe_video_schedule_next_buffer(video_out2);
+		spin_unlock(&video_out2->dma_queue_lock);
+	}
+
+	/* start HW if buffers are queued */
+	if (vpfe_video_is_pipe_ready(pipe) &&
+	    resizer->resizer_a.output == RESIZER_OUPUT_MEMORY) {
+		resizer_enable(resizer, 1);
+		vpfe_ipipe_enable(vpfe_dev, 1);
+		vpfe_ipipeif_enable(vpfe_dev);
+	}
+}
+
+/*
+ * vpfe_resizer_buffer_isr() - resizer module buffer scheduling isr
+ * @resizer: vpfe resizer device pointer.
+ */
+void vpfe_resizer_buffer_isr(struct vpfe_resizer_device *resizer)
+{
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	struct vpfe_video_device *video_out = &resizer->resizer_a.video_out;
+	struct vpfe_video_device *video_out2 = &resizer->resizer_b.video_out;
+	struct vpfe_pipeline *pipe = &resizer->resizer_a.video_out.pipe;
+	enum v4l2_field field;
+	int fid;
+
+	if (!video_out->started)
+		return;
+
+	if (resizer->crop_resizer.input == RESIZER_CROP_INPUT_NONE)
+		return;
+
+	field = video_out->fmt.fmt.pix.field;
+	if (field == V4L2_FIELD_NONE) {
+		/* handle progressive frame capture */
+		if (video_out->cur_frm != video_out->next_frm) {
+			vpfe_video_process_buffer_complete(video_out);
+			if (pipe->output_num > 1)
+				vpfe_video_process_buffer_complete(video_out2);
+		}
+
+		video_out->skip_frame_count--;
+		if (!video_out->skip_frame_count) {
+			video_out->skip_frame_count =
+				video_out->skip_frame_count_init;
+			rsz_src_enable(resizer->base_addr, 1);
+		} else {
+			rsz_src_enable(resizer->base_addr, 0);
+		}
+		return;
+	}
+
+	/* handle interlaced frame capture */
+	fid = vpfe_isif_get_fid(vpfe_dev);
+
+	/* switch the software maintained field id */
+	video_out->field_id ^= 1;
+	if (fid == video_out->field_id) {
+		/*
+		 * we are in-sync here,continue.
+		 * One frame is just being captured. If the
+		 * next frame is available, release the current
+		 * frame and move on
+		 */
+		if (fid == 0 && video_out->cur_frm != video_out->next_frm) {
+			vpfe_video_process_buffer_complete(video_out);
+			if (pipe->output_num > 1)
+				vpfe_video_process_buffer_complete(video_out2);
+		}
+	} else if (fid == 0) {
+		/*
+		* out of sync. Recover from any hardware out-of-sync.
+		* May loose one frame
+		*/
+		video_out->field_id = fid;
+	}
+}
+
+/*
+ * vpfe_resizer_dma_isr() - resizer module dma isr
+ * @resizer: vpfe resizer device pointer.
+ */
+void vpfe_resizer_dma_isr(struct vpfe_resizer_device *resizer)
+{
+	struct vpfe_video_device *video_out2 = &resizer->resizer_b.video_out;
+	struct vpfe_video_device *video_out = &resizer->resizer_a.video_out;
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	struct vpfe_pipeline *pipe = &video_out->pipe;
+	int schedule_capture = 0;
+	enum v4l2_field field;
+	int fid;
+
+	if (!video_out->started)
+		return;
+
+	if (pipe->state == VPFE_PIPELINE_STREAM_SINGLESHOT) {
+		resizer_ss_isr(resizer);
+		return;
+	}
+
+	field = video_out->fmt.fmt.pix.field;
+	if (field == V4L2_FIELD_NONE) {
+		if (!list_empty(&video_out->dma_queue) &&
+			video_out->cur_frm == video_out->next_frm)
+			schedule_capture = 1;
+	} else {
+		fid = vpfe_isif_get_fid(vpfe_dev);
+		if (fid == video_out->field_id) {
+			/* we are in-sync here,continue */
+			if (fid == 1 && !list_empty(&video_out->dma_queue) &&
+			    video_out->cur_frm == video_out->next_frm)
+				schedule_capture = 1;
+		}
+	}
+
+	if (!schedule_capture)
+		return;
+
+	spin_lock(&video_out->dma_queue_lock);
+	vpfe_video_schedule_next_buffer(video_out);
+	spin_unlock(&video_out->dma_queue_lock);
+	if (pipe->output_num > 1) {
+		spin_lock(&video_out2->dma_queue_lock);
+		vpfe_video_schedule_next_buffer(video_out2);
+		spin_unlock(&video_out2->dma_queue_lock);
+	}
+}
+
+/*
+ * V4L2 subdev operations
+ */
+
+/*
+ * resizer_ioctl() - Handle resizer module private ioctl's
+ * @sd: pointer to v4l2 subdev structure
+ * @cmd: configuration command
+ * @arg: configuration argument
+ */
+static long resizer_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
+{
+	struct vpfe_resizer_device *resizer = v4l2_get_subdevdata(sd);
+	struct device *dev = resizer->crop_resizer.subdev.v4l2_dev->dev;
+	struct vpfe_rsz_config *user_config;
+	int ret = -ENOIOCTLCMD;
+
+	if (&resizer->crop_resizer.subdev != sd)
+		return ret;
+
+	switch (cmd) {
+	case VIDIOC_VPFE_RSZ_S_CONFIG:
+		user_config = (struct vpfe_rsz_config *)arg;
+		ret = resizer_set_configuration(resizer, user_config);
+		break;
+
+	case VIDIOC_VPFE_RSZ_G_CONFIG:
+		user_config = (struct vpfe_rsz_config *)arg;
+		if (!user_config->config) {
+			dev_err(dev, "error in VIDIOC_VPFE_RSZ_G_CONFIG\n");
+			return -EINVAL;
+		}
+		ret = resizer_get_configuration(resizer, user_config);
+		break;
+	}
+	return ret;
+}
+
+static int resizer_do_hw_setup(struct vpfe_resizer_device *resizer)
+{
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	u16 ipipeif_sink = vpfe_dev->vpfe_ipipeif.input;
+	u16 ipipeif_source = vpfe_dev->vpfe_ipipeif.output;
+	struct resizer_params *param = &resizer->config;
+	int ret = 0;
+
+	if (resizer->resizer_a.output == RESIZER_OUPUT_MEMORY ||
+	    resizer->resizer_b.output == RESIZER_OUPUT_MEMORY) {
+		if (ipipeif_sink == IPIPEIF_INPUT_MEMORY &&
+		    ipipeif_source == IPIPEIF_OUTPUT_RESIZER)
+			ret = resizer_configure_in_single_shot_mode(resizer);
+		else
+			ret =  resizer_configure_in_continious_mode(resizer);
+		if (ret)
+			return ret;
+		ret = config_rsz_hw(resizer, param);
+	}
+	return ret;
+}
+
+/*
+ * resizer_set_stream() - Enable/Disable streaming on resizer subdev
+ * @sd: pointer to v4l2 subdev structure
+ * @enable: 1 == Enable, 0 == Disable
+ */
+static int resizer_set_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct vpfe_resizer_device *resizer = v4l2_get_subdevdata(sd);
+
+	if (&resizer->crop_resizer.subdev != sd)
+		return 0;
+
+	if (resizer->resizer_a.output != RESIZER_OUPUT_MEMORY)
+		return 0;
+
+	switch (enable) {
+	case 1:
+		if (resizer_do_hw_setup(resizer) < 0)
+			return -EINVAL;
+		resizer_enable(resizer, enable);
+		break;
+
+	case 0:
+		resizer_enable(resizer, enable);
+		break;
+	}
+
+	return 0;
+}
+
+/*
+ * __resizer_get_format() - helper function for getting resizer format
+ * @sd: pointer to subdev.
+ * @fh: V4L2 subdev file handle.
+ * @pad: pad number.
+ * @which: wanted subdev format.
+ * Retun wanted mbus frame format.
+ */
+static struct v4l2_mbus_framefmt *
+__resizer_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+		     unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+	struct vpfe_resizer_device *resizer = v4l2_get_subdevdata(sd);
+
+	if (which == V4L2_SUBDEV_FORMAT_TRY)
+		return v4l2_subdev_get_try_format(fh, pad);
+	if (&resizer->crop_resizer.subdev == sd)
+		return &resizer->crop_resizer.formats[pad];
+	if (&resizer->resizer_a.subdev == sd)
+		return &resizer->resizer_a.formats[pad];
+	if (&resizer->resizer_b.subdev == sd)
+		return &resizer->resizer_b.formats[pad];
+	return NULL;
+}
+
+/*
+ * resizer_try_format() - Handle try format by pad subdev method
+ * @sd: pointer to subdev.
+ * @fh: V4L2 subdev file handle.
+ * @pad: pad num.
+ * @fmt: pointer to v4l2 format structure.
+ * @which: wanted subdev format.
+ */
+static void
+resizer_try_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+	unsigned int pad, struct v4l2_mbus_framefmt *fmt,
+	enum v4l2_subdev_format_whence which)
+{
+	struct vpfe_resizer_device *resizer = v4l2_get_subdevdata(sd);
+	unsigned int max_out_height;
+	unsigned int max_out_width;
+	unsigned int i;
+
+	if ((&resizer->resizer_a.subdev == sd && pad == RESIZER_PAD_SINK) ||
+	    (&resizer->resizer_b.subdev == sd && pad == RESIZER_PAD_SINK) ||
+	    (&resizer->crop_resizer.subdev == sd &&
+	    (pad == RESIZER_CROP_PAD_SOURCE ||
+	    pad == RESIZER_CROP_PAD_SOURCE2 || pad == RESIZER_CROP_PAD_SINK))) {
+		for (i = 0; i < ARRAY_SIZE(resizer_input_formats); i++) {
+			if (fmt->code == resizer_input_formats[i])
+				break;
+		}
+		/* If not found, use UYVY as default */
+		if (i >= ARRAY_SIZE(resizer_input_formats))
+			fmt->code = V4L2_MBUS_FMT_UYVY8_2X8;
+
+		fmt->width = clamp_t(u32, fmt->width, MIN_IN_WIDTH,
+					MAX_IN_WIDTH);
+		fmt->height = clamp_t(u32, fmt->height, MIN_IN_HEIGHT,
+				MAX_IN_HEIGHT);
+	} else if (&resizer->resizer_a.subdev == sd &&
+		   pad == RESIZER_PAD_SOURCE) {
+		max_out_width = IPIPE_MAX_OUTPUT_WIDTH_A;
+		max_out_height = IPIPE_MAX_OUTPUT_HEIGHT_A;
+
+		for (i = 0; i < ARRAY_SIZE(resizer_output_formats); i++) {
+			if (fmt->code == resizer_output_formats[i])
+				break;
+		}
+		/* If not found, use UYVY as default */
+		if (i >= ARRAY_SIZE(resizer_output_formats))
+			fmt->code = V4L2_MBUS_FMT_UYVY8_2X8;
+
+		fmt->width = clamp_t(u32, fmt->width, MIN_OUT_WIDTH,
+					max_out_width);
+		fmt->width &= ~15;
+		fmt->height = clamp_t(u32, fmt->height, MIN_OUT_HEIGHT,
+				max_out_height);
+	} else if (&resizer->resizer_b.subdev == sd &&
+		   pad == RESIZER_PAD_SOURCE) {
+		max_out_width = IPIPE_MAX_OUTPUT_WIDTH_B;
+		max_out_height = IPIPE_MAX_OUTPUT_HEIGHT_B;
+
+		for (i = 0; i < ARRAY_SIZE(resizer_output_formats); i++) {
+			if (fmt->code == resizer_output_formats[i])
+				break;
+		}
+		/* If not found, use UYVY as default */
+		if (i >= ARRAY_SIZE(resizer_output_formats))
+			fmt->code = V4L2_MBUS_FMT_UYVY8_2X8;
+
+		fmt->width = clamp_t(u32, fmt->width, MIN_OUT_WIDTH,
+					max_out_width);
+		fmt->width &= ~15;
+		fmt->height = clamp_t(u32, fmt->height, MIN_OUT_HEIGHT,
+				max_out_height);
+	}
+}
+
+/*
+ * resizer_set_format() - Handle set format by pads subdev method
+ * @sd: pointer to v4l2 subdev structure
+ * @fh: V4L2 subdev file handle
+ * @fmt: pointer to v4l2 subdev format structure
+ * return -EINVAL or zero on success
+ */
+static int resizer_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+			   struct v4l2_subdev_format *fmt)
+{
+	struct vpfe_resizer_device *resizer = v4l2_get_subdevdata(sd);
+	struct v4l2_mbus_framefmt *format;
+
+	format = __resizer_get_format(sd, fh, fmt->pad, fmt->which);
+	if (format == NULL)
+		return -EINVAL;
+
+	resizer_try_format(sd, fh, fmt->pad, &fmt->format, fmt->which);
+	*format = fmt->format;
+
+	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+		return 0;
+
+	if (&resizer->crop_resizer.subdev == sd) {
+		if (fmt->pad == RESIZER_CROP_PAD_SINK) {
+			resizer->crop_resizer.formats[fmt->pad] = fmt->format;
+		} else if (fmt->pad == RESIZER_CROP_PAD_SOURCE &&
+				resizer->crop_resizer.output == RESIZER_A) {
+			resizer->crop_resizer.formats[fmt->pad] = fmt->format;
+			resizer->crop_resizer.
+			formats[RESIZER_CROP_PAD_SOURCE2] = fmt->format;
+		} else if (fmt->pad == RESIZER_CROP_PAD_SOURCE2 &&
+			resizer->crop_resizer.output2 == RESIZER_B) {
+			resizer->crop_resizer.formats[fmt->pad] = fmt->format;
+			resizer->crop_resizer.
+			formats[RESIZER_CROP_PAD_SOURCE] = fmt->format;
+		} else {
+			return -EINVAL;
+		}
+	} else if (&resizer->resizer_a.subdev == sd) {
+		if (fmt->pad == RESIZER_PAD_SINK)
+			resizer->resizer_a.formats[fmt->pad] = fmt->format;
+		else if (fmt->pad == RESIZER_PAD_SOURCE)
+			resizer->resizer_a.formats[fmt->pad] = fmt->format;
+		else
+			return -EINVAL;
+	} else if (&resizer->resizer_b.subdev == sd) {
+		if (fmt->pad == RESIZER_PAD_SINK)
+			resizer->resizer_b.formats[fmt->pad] = fmt->format;
+		else if (fmt->pad == RESIZER_PAD_SOURCE)
+			resizer->resizer_b.formats[fmt->pad] = fmt->format;
+		else
+			return -EINVAL;
+	} else {
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*
+ * resizer_get_format() - Retrieve the video format on a pad
+ * @sd: pointer to v4l2 subdev structure.
+ * @fh: V4L2 subdev file handle.
+ * @fmt: pointer to v4l2 subdev format structure
+ * return -EINVAL or zero on success
+ */
+static int resizer_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+			   struct v4l2_subdev_format *fmt)
+{
+	struct v4l2_mbus_framefmt *format;
+
+	format = __resizer_get_format(sd, fh, fmt->pad, fmt->which);
+	if (format == NULL)
+		return -EINVAL;
+
+	fmt->format = *format;
+
+	return 0;
+}
+
+/*
+ * resizer_enum_frame_size() - enum frame sizes on pads
+ * @sd: Pointer to subdevice.
+ * @fh: V4L2 subdev file handle.
+ * @code: pointer to v4l2_subdev_frame_size_enum structure.
+ */
+static int resizer_enum_frame_size(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_fh *fh,
+				   struct v4l2_subdev_frame_size_enum *fse)
+{
+	struct v4l2_mbus_framefmt format;
+
+	if (fse->index != 0)
+		return -EINVAL;
+
+	format.code = fse->code;
+	format.width = 1;
+	format.height = 1;
+	resizer_try_format(sd, fh, fse->pad, &format,
+			    V4L2_SUBDEV_FORMAT_TRY);
+	fse->min_width = format.width;
+	fse->min_height = format.height;
+
+	if (format.code != fse->code)
+		return -EINVAL;
+
+	format.code = fse->code;
+	format.width = -1;
+	format.height = -1;
+	resizer_try_format(sd, fh, fse->pad, &format,
+			   V4L2_SUBDEV_FORMAT_TRY);
+	fse->max_width = format.width;
+	fse->max_height = format.height;
+
+	return 0;
+}
+
+/*
+ * resizer_enum_mbus_code() - enum mbus codes for pads
+ * @sd: Pointer to subdevice.
+ * @fh: V4L2 subdev file handle
+ * @code: pointer to v4l2_subdev_mbus_code_enum structure
+ */
+static int resizer_enum_mbus_code(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_fh *fh,
+				  struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->pad == RESIZER_PAD_SINK) {
+		if (code->index >= ARRAY_SIZE(resizer_input_formats))
+			return -EINVAL;
+
+		code->code = resizer_input_formats[code->index];
+	} else if (code->pad == RESIZER_PAD_SOURCE) {
+		if (code->index >= ARRAY_SIZE(resizer_output_formats))
+			return -EINVAL;
+
+		code->code = resizer_output_formats[code->index];
+	}
+
+	return 0;
+}
+
+/*
+ * resizer_init_formats() - Initialize formats on all pads
+ * @sd: Pointer to subdevice.
+ * @fh: V4L2 subdev file handle.
+ *
+ * Initialize all pad formats with default values. If fh is not NULL, try
+ * formats are initialized on the file handle. Otherwise active formats are
+ * initialized on the device.
+ */
+static int resizer_init_formats(struct v4l2_subdev *sd,
+				struct v4l2_subdev_fh *fh)
+{
+	__u32 which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
+	struct vpfe_resizer_device *resizer = v4l2_get_subdevdata(sd);
+	struct v4l2_subdev_format format;
+
+	if (&resizer->crop_resizer.subdev == sd) {
+		memset(&format, 0, sizeof(format));
+		format.pad = RESIZER_CROP_PAD_SINK;
+		format.which = which;
+		format.format.code = V4L2_MBUS_FMT_YUYV8_2X8;
+		format.format.width = MAX_IN_WIDTH;
+		format.format.height = MAX_IN_HEIGHT;
+		resizer_set_format(sd, fh, &format);
+
+		memset(&format, 0, sizeof(format));
+		format.pad = RESIZER_CROP_PAD_SOURCE;
+		format.which = which;
+		format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+		format.format.width = MAX_IN_WIDTH;
+		format.format.height = MAX_IN_WIDTH;
+		resizer_set_format(sd, fh, &format);
+
+		memset(&format, 0, sizeof(format));
+		format.pad = RESIZER_CROP_PAD_SOURCE2;
+		format.which = which;
+		format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+		format.format.width = MAX_IN_WIDTH;
+		format.format.height = MAX_IN_WIDTH;
+		resizer_set_format(sd, fh, &format);
+	} else if (&resizer->resizer_a.subdev == sd) {
+		memset(&format, 0, sizeof(format));
+		format.pad = RESIZER_PAD_SINK;
+		format.which = which;
+		format.format.code = V4L2_MBUS_FMT_YUYV8_2X8;
+		format.format.width = MAX_IN_WIDTH;
+		format.format.height = MAX_IN_HEIGHT;
+		resizer_set_format(sd, fh, &format);
+
+		memset(&format, 0, sizeof(format));
+		format.pad = RESIZER_PAD_SOURCE;
+		format.which = which;
+		format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+		format.format.width = IPIPE_MAX_OUTPUT_WIDTH_A;
+		format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_A;
+		resizer_set_format(sd, fh, &format);
+	} else if (&resizer->resizer_b.subdev == sd) {
+		memset(&format, 0, sizeof(format));
+		format.pad = RESIZER_PAD_SINK;
+		format.which = which;
+		format.format.code = V4L2_MBUS_FMT_YUYV8_2X8;
+		format.format.width = MAX_IN_WIDTH;
+		format.format.height = MAX_IN_HEIGHT;
+		resizer_set_format(sd, fh, &format);
+
+		memset(&format, 0, sizeof(format));
+		format.pad = RESIZER_PAD_SOURCE;
+		format.which = which;
+		format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+		format.format.width = IPIPE_MAX_OUTPUT_WIDTH_B;
+		format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_B;
+		resizer_set_format(sd, fh, &format);
+	}
+
+	return 0;
+}
+
+/* subdev core operations */
+static const struct v4l2_subdev_core_ops resizer_v4l2_core_ops = {
+	.ioctl = resizer_ioctl,
+};
+
+/* subdev internal operations */
+static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = {
+	.open = resizer_init_formats,
+};
+
+/* subdev video operations */
+static const struct v4l2_subdev_video_ops resizer_v4l2_video_ops = {
+	.s_stream = resizer_set_stream,
+};
+
+/* subdev pad operations */
+static const struct v4l2_subdev_pad_ops resizer_v4l2_pad_ops = {
+	.enum_mbus_code = resizer_enum_mbus_code,
+	.enum_frame_size = resizer_enum_frame_size,
+	.get_fmt = resizer_get_format,
+	.set_fmt = resizer_set_format,
+};
+
+/* subdev operations */
+static const struct v4l2_subdev_ops resizer_v4l2_ops = {
+	.core = &resizer_v4l2_core_ops,
+	.video = &resizer_v4l2_video_ops,
+	.pad = &resizer_v4l2_pad_ops,
+};
+
+/*
+ * Media entity operations
+ */
+
+/*
+ * resizer_link_setup() - Setup resizer connections
+ * @entity: Pointer to media entity structure
+ * @local: Pointer to local pad array
+ * @remote: Pointer to remote pad array
+ * @flags: Link flags
+ * return -EINVAL or zero on success
+ */
+static int resizer_link_setup(struct media_entity *entity,
+			   const struct media_pad *local,
+			   const struct media_pad *remote, u32 flags)
+{
+	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
+	struct vpfe_resizer_device *resizer = v4l2_get_subdevdata(sd);
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	u16 ipipeif_source = vpfe_dev->vpfe_ipipeif.output;
+	u16 ipipe_source = vpfe_dev->vpfe_ipipe.output;
+
+	if (&resizer->crop_resizer.subdev == sd) {
+		switch (local->index | media_entity_type(remote->entity)) {
+		case RESIZER_CROP_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
+			if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+				resizer->crop_resizer.input =
+					RESIZER_CROP_INPUT_NONE;
+				break;
+			}
+
+			if (resizer->crop_resizer.input !=
+			   RESIZER_CROP_INPUT_NONE)
+				return -EBUSY;
+			if (ipipeif_source == IPIPEIF_OUTPUT_RESIZER)
+				resizer->crop_resizer.input =
+						RESIZER_CROP_INPUT_IPIPEIF;
+			else if (ipipe_source == IPIPE_OUTPUT_RESIZER)
+					resizer->crop_resizer.input =
+						RESIZER_CROP_INPUT_IPIPE;
+			else
+				return -EINVAL;
+			break;
+
+		case RESIZER_CROP_PAD_SOURCE | MEDIA_ENT_T_V4L2_SUBDEV:
+			if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+				resizer->crop_resizer.output =
+				RESIZER_CROP_OUTPUT_NONE;
+				break;
+			}
+			if (resizer->crop_resizer.output !=
+			    RESIZER_CROP_OUTPUT_NONE)
+				return -EBUSY;
+			resizer->crop_resizer.output = RESIZER_A;
+			break;
+
+		case RESIZER_CROP_PAD_SOURCE2 | MEDIA_ENT_T_V4L2_SUBDEV:
+			if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+				resizer->crop_resizer.output2 =
+					RESIZER_CROP_OUTPUT_NONE;
+				break;
+			}
+			if (resizer->crop_resizer.output2 !=
+			    RESIZER_CROP_OUTPUT_NONE)
+				return -EBUSY;
+			resizer->crop_resizer.output2 = RESIZER_B;
+			break;
+
+		default:
+			return -EINVAL;
+		}
+	} else if (&resizer->resizer_a.subdev == sd) {
+		switch (local->index | media_entity_type(remote->entity)) {
+		case RESIZER_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
+			if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+				resizer->resizer_a.input = RESIZER_INPUT_NONE;
+				break;
+			}
+			if (resizer->resizer_a.input != RESIZER_INPUT_NONE)
+				return -EBUSY;
+			resizer->resizer_a.input = RESIZER_INPUT_CROP_RESIZER;
+			break;
+
+		case RESIZER_PAD_SOURCE | MEDIA_ENT_T_DEVNODE:
+			if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+				resizer->resizer_a.output = RESIZER_OUTPUT_NONE;
+				break;
+			}
+			if (resizer->resizer_a.output != RESIZER_OUTPUT_NONE)
+				return -EBUSY;
+			resizer->resizer_a.output = RESIZER_OUPUT_MEMORY;
+			break;
+
+		default:
+			return -EINVAL;
+		}
+	} else if (&resizer->resizer_b.subdev == sd) {
+		switch (local->index | media_entity_type(remote->entity)) {
+		case RESIZER_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
+			if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+				resizer->resizer_b.input = RESIZER_INPUT_NONE;
+				break;
+			}
+			if (resizer->resizer_b.input != RESIZER_INPUT_NONE)
+				return -EBUSY;
+			resizer->resizer_b.input = RESIZER_INPUT_CROP_RESIZER;
+			break;
+
+		case RESIZER_PAD_SOURCE | MEDIA_ENT_T_DEVNODE:
+			if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+				resizer->resizer_b.output = RESIZER_OUTPUT_NONE;
+				break;
+			}
+			if (resizer->resizer_b.output != RESIZER_OUTPUT_NONE)
+				return -EBUSY;
+			resizer->resizer_b.output = RESIZER_OUPUT_MEMORY;
+			break;
+
+		default:
+			return -EINVAL;
+		}
+	} else {
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct media_entity_operations resizer_media_ops = {
+	.link_setup = resizer_link_setup,
+};
+
+/*
+ * vpfe_resizer_unregister_entities() - Unregister entity
+ * @vpfe_rsz - pointer to resizer subdevice structure.
+ */
+void vpfe_resizer_unregister_entities(struct vpfe_resizer_device *vpfe_rsz)
+{
+	/* unregister video devices */
+	vpfe_video_unregister(&vpfe_rsz->resizer_a.video_out);
+	vpfe_video_unregister(&vpfe_rsz->resizer_b.video_out);
+
+	/* cleanup entity */
+	media_entity_cleanup(&vpfe_rsz->crop_resizer.subdev.entity);
+	media_entity_cleanup(&vpfe_rsz->resizer_a.subdev.entity);
+	media_entity_cleanup(&vpfe_rsz->resizer_b.subdev.entity);
+	/* unregister subdev */
+	v4l2_device_unregister_subdev(&vpfe_rsz->crop_resizer.subdev);
+	v4l2_device_unregister_subdev(&vpfe_rsz->resizer_a.subdev);
+	v4l2_device_unregister_subdev(&vpfe_rsz->resizer_b.subdev);
+}
+
+/*
+ * vpfe_resizer_register_entities() - Register entity
+ * @resizer - pointer to resizer devive.
+ * @vdev: pointer to v4l2 device structure.
+ */
+int vpfe_resizer_register_entities(struct vpfe_resizer_device *resizer,
+				   struct v4l2_device *vdev)
+{
+	struct vpfe_device *vpfe_dev = to_vpfe_device(resizer);
+	unsigned int flags = 0;
+	int ret;
+
+	/* Register the crop resizer subdev */
+	ret = v4l2_device_register_subdev(vdev, &resizer->crop_resizer.subdev);
+	if (ret < 0) {
+		pr_err("Failed to register crop resizer as v4l2-subdev\n");
+		return ret;
+	}
+	/* Register Resizer-A subdev */
+	ret = v4l2_device_register_subdev(vdev, &resizer->resizer_a.subdev);
+	if (ret < 0) {
+		pr_err("Failed to register resizer-a as v4l2-subdev\n");
+		return ret;
+	}
+	/* Register Resizer-B subdev */
+	ret = v4l2_device_register_subdev(vdev, &resizer->resizer_b.subdev);
+	if (ret < 0) {
+		pr_err("Failed to register resizer-b as v4l2-subdev\n");
+		return ret;
+	}
+	/* Register video-out device for resizer-a */
+	ret = vpfe_video_register(&resizer->resizer_a.video_out, vdev);
+	if (ret) {
+		pr_err("Failed to register RSZ-A video-out device\n");
+		goto out_video_out2_register;
+	}
+	resizer->resizer_a.video_out.vpfe_dev = vpfe_dev;
+
+	/* Register video-out device for resizer-b */
+	ret = vpfe_video_register(&resizer->resizer_b.video_out, vdev);
+	if (ret) {
+		pr_err("Failed to register RSZ-B video-out device\n");
+		goto out_video_out2_register;
+	}
+	resizer->resizer_b.video_out.vpfe_dev = vpfe_dev;
+
+	/* create link between Resizer Crop----> Resizer A*/
+	ret = media_entity_create_link(&resizer->crop_resizer.subdev.entity, 1,
+				&resizer->resizer_a.subdev.entity,
+				0, flags);
+	if (ret < 0)
+		goto out_create_link;
+
+	/* create link between Resizer Crop----> Resizer B*/
+	ret = media_entity_create_link(&resizer->crop_resizer.subdev.entity, 2,
+				&resizer->resizer_b.subdev.entity,
+				0, flags);
+	if (ret < 0)
+		goto out_create_link;
+
+	/* create link between Resizer A ----> video out */
+	ret = media_entity_create_link(&resizer->resizer_a.subdev.entity, 1,
+		&resizer->resizer_a.video_out.video_dev.entity, 0, flags);
+	if (ret < 0)
+		goto out_create_link;
+
+	/* create link between Resizer B ----> video out */
+	ret = media_entity_create_link(&resizer->resizer_b.subdev.entity, 1,
+		&resizer->resizer_b.video_out.video_dev.entity, 0, flags);
+	if (ret < 0)
+		goto out_create_link;
+
+	return 0;
+
+out_create_link:
+	vpfe_video_unregister(&resizer->resizer_b.video_out);
+out_video_out2_register:
+	vpfe_video_unregister(&resizer->resizer_a.video_out);
+	media_entity_cleanup(&resizer->crop_resizer.subdev.entity);
+	media_entity_cleanup(&resizer->resizer_a.subdev.entity);
+	media_entity_cleanup(&resizer->resizer_b.subdev.entity);
+	v4l2_device_unregister_subdev(&resizer->crop_resizer.subdev);
+	v4l2_device_unregister_subdev(&resizer->resizer_a.subdev);
+	v4l2_device_unregister_subdev(&resizer->resizer_b.subdev);
+	return ret;
+}
+
+/*
+ * vpfe_resizer_init() - resizer device initialization.
+ * @vpfe_rsz - pointer to resizer device
+ * @pdev: platform device pointer.
+ */
+int vpfe_resizer_init(struct vpfe_resizer_device *vpfe_rsz,
+		      struct platform_device *pdev)
+{
+	struct v4l2_subdev *sd = &vpfe_rsz->crop_resizer.subdev;
+	struct media_pad *pads = &vpfe_rsz->crop_resizer.pads[0];
+	struct media_entity *me = &sd->entity;
+	static resource_size_t  res_len;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 5);
+	if (!res)
+		return -ENOENT;
+
+	res_len = resource_size(res);
+	res = request_mem_region(res->start, res_len, res->name);
+	if (!res)
+		return -EBUSY;
+
+	vpfe_rsz->base_addr = ioremap_nocache(res->start, res_len);
+	if (!vpfe_rsz->base_addr)
+		return -EBUSY;
+
+	v4l2_subdev_init(sd, &resizer_v4l2_ops);
+	sd->internal_ops = &resizer_v4l2_internal_ops;
+	strlcpy(sd->name, "DAVINCI RESIZER CROP", sizeof(sd->name));
+	sd->grp_id = 1 << 16;	/* group ID for davinci subdevs */
+	v4l2_set_subdevdata(sd, vpfe_rsz);
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+	pads[RESIZER_CROP_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+	pads[RESIZER_CROP_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+	pads[RESIZER_CROP_PAD_SOURCE2].flags = MEDIA_PAD_FL_SOURCE;
+
+	vpfe_rsz->crop_resizer.input = RESIZER_CROP_INPUT_NONE;
+	vpfe_rsz->crop_resizer.output = RESIZER_CROP_OUTPUT_NONE;
+	vpfe_rsz->crop_resizer.output2 = RESIZER_CROP_OUTPUT_NONE;
+	vpfe_rsz->crop_resizer.rsz_device = vpfe_rsz;
+	me->ops = &resizer_media_ops;
+	ret = media_entity_init(me, RESIZER_CROP_PADS_NUM, pads, 0);
+	if (ret)
+		return ret;
+
+	sd = &vpfe_rsz->resizer_a.subdev;
+	pads = &vpfe_rsz->resizer_a.pads[0];
+	me = &sd->entity;
+
+	v4l2_subdev_init(sd, &resizer_v4l2_ops);
+	sd->internal_ops = &resizer_v4l2_internal_ops;
+	strlcpy(sd->name, "DAVINCI RESIZER A", sizeof(sd->name));
+	sd->grp_id = 1 << 16;	/* group ID for davinci subdevs */
+	v4l2_set_subdevdata(sd, vpfe_rsz);
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+	pads[RESIZER_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+	pads[RESIZER_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+
+	vpfe_rsz->resizer_a.input = RESIZER_INPUT_NONE;
+	vpfe_rsz->resizer_a.output = RESIZER_OUTPUT_NONE;
+	vpfe_rsz->resizer_a.rsz_device = vpfe_rsz;
+	me->ops = &resizer_media_ops;
+	ret = media_entity_init(me, RESIZER_PADS_NUM, pads, 0);
+	if (ret)
+		return ret;
+
+	sd = &vpfe_rsz->resizer_b.subdev;
+	pads = &vpfe_rsz->resizer_b.pads[0];
+	me = &sd->entity;
+
+	v4l2_subdev_init(sd, &resizer_v4l2_ops);
+	sd->internal_ops = &resizer_v4l2_internal_ops;
+	strlcpy(sd->name, "DAVINCI RESIZER B", sizeof(sd->name));
+	sd->grp_id = 1 << 16;	/* group ID for davinci subdevs */
+	v4l2_set_subdevdata(sd, vpfe_rsz);
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+	pads[RESIZER_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+	pads[RESIZER_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+
+	vpfe_rsz->resizer_b.input = RESIZER_INPUT_NONE;
+	vpfe_rsz->resizer_b.output = RESIZER_OUTPUT_NONE;
+	vpfe_rsz->resizer_b.rsz_device = vpfe_rsz;
+	me->ops = &resizer_media_ops;
+	ret = media_entity_init(me, RESIZER_PADS_NUM, pads, 0);
+	if (ret)
+		return ret;
+
+	vpfe_rsz->resizer_a.video_out.ops = &resizer_a_video_ops;
+	vpfe_rsz->resizer_a.video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	ret = vpfe_video_init(&vpfe_rsz->resizer_a.video_out, "RSZ-A");
+	if (ret) {
+		pr_err("Failed to init RSZ video-out device\n");
+		return ret;
+	}
+	vpfe_rsz->resizer_b.video_out.ops = &resizer_b_video_ops;
+	vpfe_rsz->resizer_b.video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	ret = vpfe_video_init(&vpfe_rsz->resizer_b.video_out, "RSZ-B");
+	if (ret) {
+		pr_err("Failed to init RSZ video-out2 device\n");
+		return ret;
+	}
+	memset(&vpfe_rsz->config, 0, sizeof(struct resizer_params));
+
+	return 0;
+}
+
+void
+vpfe_resizer_cleanup(struct vpfe_resizer_device *vpfe_rsz,
+		     struct platform_device *pdev)
+{
+	struct resource *res;
+
+	iounmap(vpfe_rsz->base_addr);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 5);
+	if (res)
+		release_mem_region(res->start,
+					res->end - res->start + 1);
+}

drivers/staging/media/davinci_vpfe/dm365_resizer.h

+/*
+ * Copyright (C) 2012 Texas Instruments Inc
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ * Contributors:
+ *      Manjunath Hadli <manjunath.hadli@ti.com>
+ *      Prabhakar Lad <prabhakar.lad@ti.com>
+ */
+
+#ifndef _DAVINCI_VPFE_DM365_RESIZER_H
+#define _DAVINCI_VPFE_DM365_RESIZER_H
+
+enum resizer_oper_mode {
+	RESIZER_MODE_CONTINIOUS = 0,
+	RESIZER_MODE_ONE_SHOT = 1,
+};
+
+struct f_div_pass {
+	unsigned int o_hsz;
+	unsigned int i_hps;
+	unsigned int h_phs;
+	unsigned int src_hps;
+	unsigned int src_hsz;
+};
+
+#define MAX_PASSES		2
+
+struct f_div_param {
+	unsigned char en;
+	unsigned int num_passes;
+	struct f_div_pass pass[MAX_PASSES];
+};
+
+/* Resizer Rescale Parameters*/
+struct resizer_scale_param {
+	bool h_flip;
+	bool v_flip;
+	bool cen;
+	bool yen;
+	unsigned short i_vps;
+	unsigned short i_hps;
+	unsigned short o_vsz;
+	unsigned short o_hsz;
+	unsigned short v_phs_y;
+	unsigned short v_phs_c;
+	unsigned short v_dif;
+	/* resize method - Luminance */
+	enum vpfe_rsz_intp_t v_typ_y;
+	/* resize method - Chrominance */
+	enum vpfe_rsz_intp_t v_typ_c;
+	/* vertical lpf intensity - Luminance */
+	unsigned char v_lpf_int_y;
+	/* vertical lpf intensity - Chrominance */
+	unsigned char v_lpf_int_c;
+	unsigned short h_phs;
+	unsigned short h_dif;
+	/* resize method - Luminance */
+	enum vpfe_rsz_intp_t h_typ_y;
+	/* resize method - Chrominance */
+	enum vpfe_rsz_intp_t h_typ_c;
+	/* horizontal lpf intensity - Luminance */
+	unsigned char h_lpf_int_y;
+	/* horizontal lpf intensity - Chrominance */
+	unsigned char h_lpf_int_c;
+	bool dscale_en;
+	enum vpfe_rsz_down_scale_ave_sz h_dscale_ave_sz;
+	enum vpfe_rsz_down_scale_ave_sz v_dscale_ave_sz;
+	/* store the calculated frame division parameter */
+	struct f_div_param f_div;
+};
+
+enum resizer_rgb_t {
+	OUTPUT_32BIT,
+	OUTPUT_16BIT
+};
+
+enum resizer_rgb_msk_t {
+	NOMASK = 0,
+	MASKLAST2 = 1,
+};
+
+/* Resizer RGB Conversion Parameters */
+struct resizer_rgb {
+	bool rgb_en;
+	enum resizer_rgb_t rgb_typ;
+	enum resizer_rgb_msk_t rgb_msk0;
+	enum resizer_rgb_msk_t rgb_msk1;
+	unsigned int rgb_alpha_val;
+};
+
+/* Resizer External Memory Parameters */
+struct rsz_ext_mem_param {
+	unsigned int rsz_sdr_oft_y;
+	unsigned int rsz_sdr_ptr_s_y;
+	unsigned int rsz_sdr_ptr_e_y;
+	unsigned int rsz_sdr_oft_c;
+	unsigned int rsz_sdr_ptr_s_c;
+	unsigned int rsz_sdr_ptr_e_c;
+	/* offset to be added to buffer start when flipping for y/ycbcr */
+	unsigned int flip_ofst_y;
+	/* offset to be added to buffer start when flipping for c */
+	unsigned int flip_ofst_c;
+	/* c offset for YUV 420SP */
+	unsigned int c_offset;
+	/* User Defined Y offset for YUV 420SP or YUV420ILE data */
+	unsigned int user_y_ofst;
+	/* User Defined C offset for YUV 420SP data */
+	unsigned int user_c_ofst;
+};
+
+enum rsz_data_source {
+	IPIPE_DATA,
+	IPIPEIF_DATA
+};
+
+enum rsz_src_img_fmt {
+	RSZ_IMG_422,
+	RSZ_IMG_420
+};
+
+enum rsz_dpaths_bypass_t {
+	BYPASS_OFF = 0,
+	BYPASS_ON = 1,
+};
+
+struct rsz_common_params {
+	unsigned int vps;
+	unsigned int vsz;
+	unsigned int hps;
+	unsigned int hsz;
+	/* 420 or 422 */
+	enum rsz_src_img_fmt src_img_fmt;
+	/* Y or C when src_fmt is 420, 0 - y, 1 - c */
+	unsigned char y_c;
+	/* flip raw or ycbcr */
+	unsigned char raw_flip;
+	/* IPIPE or IPIPEIF data */
+	enum rsz_data_source source;
+	enum rsz_dpaths_bypass_t passthrough;
+	unsigned char yuv_y_min;
+	unsigned char yuv_y_max;
+	unsigned char yuv_c_min;
+	unsigned char yuv_c_max;
+	bool rsz_seq_crv;
+	enum vpfe_chr_pos out_chr_pos;
+};
+
+struct resizer_params {
+	enum resizer_oper_mode oper_mode;
+	struct rsz_common_params rsz_common;
+	struct resizer_scale_param rsz_rsc_param[2];
+	struct resizer_rgb rsz2rgb[2];
+	struct rsz_ext_mem_param ext_mem_param[2];
+	bool rsz_en[2];
+	struct vpfe_rsz_config_params user_config;
+};
+
+#define ENABLE			1
+#define DISABLE			(!ENABLE)
+
+#define RESIZER_CROP_PAD_SINK		0
+#define RESIZER_CROP_PAD_SOURCE		1
+#define RESIZER_CROP_PAD_SOURCE2	2
+
+#define RESIZER_CROP_PADS_NUM		3
+
+enum resizer_crop_input_entity {
+	RESIZER_CROP_INPUT_NONE = 0,
+	RESIZER_CROP_INPUT_IPIPEIF = 1,
+	RESIZER_CROP_INPUT_IPIPE = 2,
+};
+
+enum resizer_crop_output_entity {
+	RESIZER_CROP_OUTPUT_NONE,
+	RESIZER_A,
+	RESIZER_B,
+};
+
+struct dm365_crop_resizer_device {
+	struct v4l2_subdev			subdev;
+	struct media_pad			pads[RESIZER_CROP_PADS_NUM];
+	struct v4l2_mbus_framefmt		formats[RESIZER_CROP_PADS_NUM];
+	enum resizer_crop_input_entity		input;
+	enum resizer_crop_output_entity		output;
+	enum resizer_crop_output_entity		output2;
+	struct vpfe_resizer_device		*rsz_device;
+};
+
+#define RESIZER_PAD_SINK		0
+#define RESIZER_PAD_SOURCE		1
+
+#define RESIZER_PADS_NUM		2
+
+enum resizer_input_entity {
+	RESIZER_INPUT_NONE = 0,
+	RESIZER_INPUT_CROP_RESIZER = 1,
+};
+
+enum resizer_output_entity {
+	RESIZER_OUTPUT_NONE = 0,
+	RESIZER_OUPUT_MEMORY = 1,
+};
+
+struct dm365_resizer_device {
+	struct v4l2_subdev		subdev;
+	struct media_pad		pads[RESIZER_PADS_NUM];
+	struct v4l2_mbus_framefmt	formats[RESIZER_PADS_NUM];
+	enum resizer_input_entity	input;
+	enum resizer_output_entity	output;
+	struct vpfe_video_device	video_out;
+	struct vpfe_resizer_device	*rsz_device;
+};
+
+struct vpfe_resizer_device {
+	struct dm365_crop_resizer_device	crop_resizer;
+	struct dm365_resizer_device		resizer_a;
+	struct dm365_resizer_device		resizer_b;
+	struct resizer_params			config;
+	void *__iomem base_addr;
+};
+
+int vpfe_resizer_init(struct vpfe_resizer_device *vpfe_rsz,
+		      struct platform_device *pdev);
+int vpfe_resizer_register_entities(struct vpfe_resizer_device *vpfe_rsz,
+				   struct v4l2_device *v4l2_dev);
+void vpfe_resizer_unregister_entities(struct vpfe_resizer_device *vpfe_rsz);
+void vpfe_resizer_cleanup(struct vpfe_resizer_device *vpfe_rsz,
+			  struct platform_device *pdev);
+void vpfe_resizer_buffer_isr(struct vpfe_resizer_device *resizer);
+void vpfe_resizer_dma_isr(struct vpfe_resizer_device *resizer);
+
+#endif		/* _DAVINCI_VPFE_DM365_RESIZER_H */