Added missing tegra files.HEADmaster

1 files changed, 1738 insertions, 0 deletions

diff --git a/drivers/media/video/omap3isp/ispresizer.c b/drivers/media/video/omap3isp/ispresizer.c
new file mode 100644
index 00000000000..0bb0f8cd36f
--- /dev/null
+++ b/drivers/media/video/omap3isp/ispresizer.c
@@ -0,0 +1,1738 @@
+/*
+ * ispresizer.c
+ *
+ * TI OMAP3 ISP - Resizer module
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2009 Texas Instruments, Inc
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *           Sakari Ailus <sakari.ailus@iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/device.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+
+#include "isp.h"
+#include "ispreg.h"
+#include "ispresizer.h"
+
+/*
+ * Resizer Constants
+ */
+#define MIN_RESIZE_VALUE                64
+#define MID_RESIZE_VALUE                512
+#define MAX_RESIZE_VALUE                1024
+
+#define MIN_IN_WIDTH                    32
+#define MIN_IN_HEIGHT                   32
+#define MAX_IN_WIDTH_MEMORY_MODE        4095
+#define MAX_IN_WIDTH_ONTHEFLY_MODE_ES1  1280
+#define MAX_IN_WIDTH_ONTHEFLY_MODE_ES2  4095
+#define MAX_IN_HEIGHT                   4095
+
+#define MIN_OUT_WIDTH                   16
+#define MIN_OUT_HEIGHT                  2
+#define MAX_OUT_HEIGHT                  4095
+
+/*
+ * Resizer Use Constraints
+ * "TRM ES3.1, table 12-46"
+ */
+#define MAX_4TAP_OUT_WIDTH_ES1          1280
+#define MAX_7TAP_OUT_WIDTH_ES1          640
+#define MAX_4TAP_OUT_WIDTH_ES2          3312
+#define MAX_7TAP_OUT_WIDTH_ES2          1650
+#define MAX_4TAP_OUT_WIDTH_3630         4096
+#define MAX_7TAP_OUT_WIDTH_3630         2048
+
+/*
+ * Constants for ratio calculation
+ */
+#define RESIZE_DIVISOR                  256
+#define DEFAULT_PHASE                   1
+
+/*
+ * Default (and only) configuration of filter coefficients.
+ * 7-tap mode is for scale factors 0.25x to 0.5x.
+ * 4-tap mode is for scale factors 0.5x to 4.0x.
+ * There shouldn't be any reason to recalculate these, EVER.
+ */
+static const struct isprsz_coef filter_coefs = {
+        /* For 8-phase 4-tap horizontal filter: */
+        {
+                0x0000, 0x0100, 0x0000, 0x0000,
+                0x03FA, 0x00F6, 0x0010, 0x0000,
+                0x03F9, 0x00DB, 0x002C, 0x0000,
+                0x03FB, 0x00B3, 0x0053, 0x03FF,
+                0x03FD, 0x0082, 0x0084, 0x03FD,
+                0x03FF, 0x0053, 0x00B3, 0x03FB,
+                0x0000, 0x002C, 0x00DB, 0x03F9,
+                0x0000, 0x0010, 0x00F6, 0x03FA
+        },
+        /* For 8-phase 4-tap vertical filter: */
+        {
+                0x0000, 0x0100, 0x0000, 0x0000,
+                0x03FA, 0x00F6, 0x0010, 0x0000,
+                0x03F9, 0x00DB, 0x002C, 0x0000,
+                0x03FB, 0x00B3, 0x0053, 0x03FF,
+                0x03FD, 0x0082, 0x0084, 0x03FD,
+                0x03FF, 0x0053, 0x00B3, 0x03FB,
+                0x0000, 0x002C, 0x00DB, 0x03F9,
+                0x0000, 0x0010, 0x00F6, 0x03FA
+        },
+        /* For 4-phase 7-tap horizontal filter: */
+        #define DUMMY 0
+        {
+                0x0004, 0x0023, 0x005A, 0x0058, 0x0023, 0x0004, 0x0000, DUMMY,
+                0x0002, 0x0018, 0x004d, 0x0060, 0x0031, 0x0008, 0x0000, DUMMY,
+                0x0001, 0x000f, 0x003f, 0x0062, 0x003f, 0x000f, 0x0001, DUMMY,
+                0x0000, 0x0008, 0x0031, 0x0060, 0x004d, 0x0018, 0x0002, DUMMY
+        },
+        /* For 4-phase 7-tap vertical filter: */
+        {
+                0x0004, 0x0023, 0x005A, 0x0058, 0x0023, 0x0004, 0x0000, DUMMY,
+                0x0002, 0x0018, 0x004d, 0x0060, 0x0031, 0x0008, 0x0000, DUMMY,
+                0x0001, 0x000f, 0x003f, 0x0062, 0x003f, 0x000f, 0x0001, DUMMY,
+                0x0000, 0x0008, 0x0031, 0x0060, 0x004d, 0x0018, 0x0002, DUMMY
+        }
+        /*
+         * The dummy padding is required in 7-tap mode because of how the
+         * registers are arranged physically.
+         */
+        #undef DUMMY
+};
+
+/*
+ * __resizer_get_format - helper function for getting resizer format
+ * @res   : pointer to resizer private structure
+ * @pad   : pad number
+ * @fh    : V4L2 subdev file handle
+ * @which : wanted subdev format
+ * return zero
+ */
+static struct v4l2_mbus_framefmt *
+__resizer_get_format(struct isp_res_device *res, struct v4l2_subdev_fh *fh,
+                     unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+        if (which == V4L2_SUBDEV_FORMAT_TRY)
+                return v4l2_subdev_get_try_format(fh, pad);
+        else
+                return &res->formats[pad];
+}
+
+/*
+ * __resizer_get_crop - helper function for getting resizer crop rectangle
+ * @res   : pointer to resizer private structure
+ * @fh    : V4L2 subdev file handle
+ * @which : wanted subdev crop rectangle
+ */
+static struct v4l2_rect *
+__resizer_get_crop(struct isp_res_device *res, struct v4l2_subdev_fh *fh,
+                   enum v4l2_subdev_format_whence which)
+{
+        if (which == V4L2_SUBDEV_FORMAT_TRY)
+                return v4l2_subdev_get_try_crop(fh, RESZ_PAD_SINK);
+        else
+                return &res->crop.request;
+}
+
+/*
+ * resizer_set_filters - Set resizer filters
+ * @res: Device context.
+ * @h_coeff: horizontal coefficient
+ * @v_coeff: vertical coefficient
+ * Return none
+ */
+static void resizer_set_filters(struct isp_res_device *res, const u16 *h_coeff,
+                                const u16 *v_coeff)
+{
+        struct isp_device *isp = to_isp_device(res);
+        u32 startaddr_h, startaddr_v, tmp_h, tmp_v;
+        int i;
+
+        startaddr_h = ISPRSZ_HFILT10;
+        startaddr_v = ISPRSZ_VFILT10;
+
+        for (i = 0; i < COEFF_CNT; i += 2) {
+                tmp_h = h_coeff[i] |
+                        (h_coeff[i + 1] << ISPRSZ_HFILT_COEF1_SHIFT);
+                tmp_v = v_coeff[i] |
+                        (v_coeff[i + 1] << ISPRSZ_VFILT_COEF1_SHIFT);
+                isp_reg_writel(isp, tmp_h, OMAP3_ISP_IOMEM_RESZ, startaddr_h);
+                isp_reg_writel(isp, tmp_v, OMAP3_ISP_IOMEM_RESZ, startaddr_v);
+                startaddr_h += 4;
+                startaddr_v += 4;
+        }
+}
+
+/*
+ * resizer_set_bilinear - Chrominance horizontal algorithm select
+ * @res: Device context.
+ * @type: Filtering interpolation type.
+ *
+ * Filtering that is same as luminance processing is
+ * intended only for downsampling, and bilinear interpolation
+ * is intended only for upsampling.
+ */
+static void resizer_set_bilinear(struct isp_res_device *res,
+                                 enum resizer_chroma_algo type)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        if (type == RSZ_BILINEAR)
+                isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
+                            ISPRSZ_CNT_CBILIN);
+        else
+                isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
+                            ISPRSZ_CNT_CBILIN);
+}
+
+/*
+ * resizer_set_ycpos - Luminance and chrominance order
+ * @res: Device context.
+ * @order: order type.
+ */
+static void resizer_set_ycpos(struct isp_res_device *res,
+                              enum v4l2_mbus_pixelcode pixelcode)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        switch (pixelcode) {
+        case V4L2_MBUS_FMT_YUYV8_1X16:
+                isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
+                            ISPRSZ_CNT_YCPOS);
+                break;
+        case V4L2_MBUS_FMT_UYVY8_1X16:
+                isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
+                            ISPRSZ_CNT_YCPOS);
+                break;
+        default:
+                return;
+        }
+}
+
+/*
+ * resizer_set_phase - Setup horizontal and vertical starting phase
+ * @res: Device context.
+ * @h_phase: horizontal phase parameters.
+ * @v_phase: vertical phase parameters.
+ *
+ * Horizontal and vertical phase range is 0 to 7
+ */
+static void resizer_set_phase(struct isp_res_device *res, u32 h_phase,
+                              u32 v_phase)
+{
+        struct isp_device *isp = to_isp_device(res);
+        u32 rgval = 0;
+
+        rgval = isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT) &
+              ~(ISPRSZ_CNT_HSTPH_MASK | ISPRSZ_CNT_VSTPH_MASK);
+        rgval |= (h_phase << ISPRSZ_CNT_HSTPH_SHIFT) & ISPRSZ_CNT_HSTPH_MASK;
+        rgval |= (v_phase << ISPRSZ_CNT_VSTPH_SHIFT) & ISPRSZ_CNT_VSTPH_MASK;
+
+        isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT);
+}
+
+/*
+ * resizer_set_luma - Setup luminance enhancer parameters
+ * @res: Device context.
+ * @luma: Structure for luminance enhancer parameters.
+ *
+ * Algorithm select:
+ *  0x0: Disable
+ *  0x1: [-1  2 -1]/2 high-pass filter
+ *  0x2: [-1 -2  6 -2 -1]/4 high-pass filter
+ *
+ * Maximum gain:
+ *  The data is coded in U4Q4 representation.
+ *
+ * Slope:
+ *  The data is coded in U4Q4 representation.
+ *
+ * Coring offset:
+ *  The data is coded in U8Q0 representation.
+ *
+ * The new luminance value is computed as:
+ *  Y += HPF(Y) x max(GAIN, (HPF(Y) - CORE) x SLOP + 8) >> 4.
+ */
+static void resizer_set_luma(struct isp_res_device *res,
+                             struct resizer_luma_yenh *luma)
+{
+        struct isp_device *isp = to_isp_device(res);
+        u32 rgval = 0;
+
+        rgval  = (luma->algo << ISPRSZ_YENH_ALGO_SHIFT)
+                  & ISPRSZ_YENH_ALGO_MASK;
+        rgval |= (luma->gain << ISPRSZ_YENH_GAIN_SHIFT)
+                  & ISPRSZ_YENH_GAIN_MASK;
+        rgval |= (luma->slope << ISPRSZ_YENH_SLOP_SHIFT)
+                  & ISPRSZ_YENH_SLOP_MASK;
+        rgval |= (luma->core << ISPRSZ_YENH_CORE_SHIFT)
+                  & ISPRSZ_YENH_CORE_MASK;
+
+        isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_YENH);
+}
+
+/*
+ * resizer_set_source - Input source select
+ * @res: Device context.
+ * @source: Input source type
+ *
+ * If this field is set to RESIZER_INPUT_VP, the resizer input is fed from
+ * Preview/CCDC engine, otherwise from memory.
+ */
+static void resizer_set_source(struct isp_res_device *res,
+                               enum resizer_input_entity source)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        if (source == RESIZER_INPUT_MEMORY)
+                isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
+                            ISPRSZ_CNT_INPSRC);
+        else
+                isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
+                            ISPRSZ_CNT_INPSRC);
+}
+
+/*
+ * resizer_set_ratio - Setup horizontal and vertical resizing value
+ * @res: Device context.
+ * @ratio: Structure for ratio parameters.
+ *
+ * Resizing range from 64 to 1024
+ */
+static void resizer_set_ratio(struct isp_res_device *res,
+                              const struct resizer_ratio *ratio)
+{
+        struct isp_device *isp = to_isp_device(res);
+        const u16 *h_filter, *v_filter;
+        u32 rgval = 0;
+
+        rgval = isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT) &
+                              ~(ISPRSZ_CNT_HRSZ_MASK | ISPRSZ_CNT_VRSZ_MASK);
+        rgval |= ((ratio->horz - 1) << ISPRSZ_CNT_HRSZ_SHIFT)
+                  & ISPRSZ_CNT_HRSZ_MASK;
+        rgval |= ((ratio->vert - 1) << ISPRSZ_CNT_VRSZ_SHIFT)
+                  & ISPRSZ_CNT_VRSZ_MASK;
+        isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT);
+
+        /* prepare horizontal filter coefficients */
+        if (ratio->horz > MID_RESIZE_VALUE)
+                h_filter = &filter_coefs.h_filter_coef_7tap[0];
+        else
+                h_filter = &filter_coefs.h_filter_coef_4tap[0];
+
+        /* prepare vertical filter coefficients */
+        if (ratio->vert > MID_RESIZE_VALUE)
+                v_filter = &filter_coefs.v_filter_coef_7tap[0];
+        else
+                v_filter = &filter_coefs.v_filter_coef_4tap[0];
+
+        resizer_set_filters(res, h_filter, v_filter);
+}
+
+/*
+ * resizer_set_dst_size - Setup the output height and width
+ * @res: Device context.
+ * @width: Output width.
+ * @height: Output height.
+ *
+ * Width :
+ *  The value must be EVEN.
+ *
+ * Height:
+ *  The number of bytes written to SDRAM must be
+ *  a multiple of 16-bytes if the vertical resizing factor
+ *  is greater than 1x (upsizing)
+ */
+static void resizer_set_output_size(struct isp_res_device *res,
+                                    u32 width, u32 height)
+{
+        struct isp_device *isp = to_isp_device(res);
+        u32 rgval = 0;
+
+        dev_dbg(isp->dev, "Output size[w/h]: %dx%d\n", width, height);
+        rgval  = (width << ISPRSZ_OUT_SIZE_HORZ_SHIFT)
+                 & ISPRSZ_OUT_SIZE_HORZ_MASK;
+        rgval |= (height << ISPRSZ_OUT_SIZE_VERT_SHIFT)
+                 & ISPRSZ_OUT_SIZE_VERT_MASK;
+        isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_OUT_SIZE);
+}
+
+/*
+ * resizer_set_output_offset - Setup memory offset for the output lines.
+ * @res: Device context.
+ * @offset: Memory offset.
+ *
+ * The 5 LSBs are forced to be zeros by the hardware to align on a 32-byte
+ * boundary; the 5 LSBs are read-only. For optimal use of SDRAM bandwidth,
+ * the SDRAM line offset must be set on a 256-byte boundary
+ */
+static void resizer_set_output_offset(struct isp_res_device *res, u32 offset)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        isp_reg_writel(isp, offset, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_OUTOFF);
+}
+
+/*
+ * resizer_set_start - Setup vertical and horizontal start position
+ * @res: Device context.
+ * @left: Horizontal start position.
+ * @top: Vertical start position.
+ *
+ * Vertical start line:
+ *  This field makes sense only when the resizer obtains its input
+ *  from the preview engine/CCDC
+ *
+ * Horizontal start pixel:
+ *  Pixels are coded on 16 bits for YUV and 8 bits for color separate data.
+ *  When the resizer gets its input from SDRAM, this field must be set
+ *  to <= 15 for YUV 16-bit data and <= 31 for 8-bit color separate data
+ */
+static void resizer_set_start(struct isp_res_device *res, u32 left, u32 top)
+{
+        struct isp_device *isp = to_isp_device(res);
+        u32 rgval = 0;
+
+        rgval = (left << ISPRSZ_IN_START_HORZ_ST_SHIFT)
+                & ISPRSZ_IN_START_HORZ_ST_MASK;
+        rgval |= (top << ISPRSZ_IN_START_VERT_ST_SHIFT)
+                 & ISPRSZ_IN_START_VERT_ST_MASK;
+
+        isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_IN_START);
+}
+
+/*
+ * resizer_set_input_size - Setup the input size
+ * @res: Device context.
+ * @width: The range is 0 to 4095 pixels
+ * @height: The range is 0 to 4095 lines
+ */
+static void resizer_set_input_size(struct isp_res_device *res,
+                                   u32 width, u32 height)
+{
+        struct isp_device *isp = to_isp_device(res);
+        u32 rgval = 0;
+
+        dev_dbg(isp->dev, "Input size[w/h]: %dx%d\n", width, height);
+
+        rgval = (width << ISPRSZ_IN_SIZE_HORZ_SHIFT)
+                & ISPRSZ_IN_SIZE_HORZ_MASK;
+        rgval |= (height << ISPRSZ_IN_SIZE_VERT_SHIFT)
+                 & ISPRSZ_IN_SIZE_VERT_MASK;
+
+        isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_IN_SIZE);
+}
+
+/*
+ * resizer_set_src_offs - Setup the memory offset for the input lines
+ * @res: Device context.
+ * @offset: Memory offset.
+ *
+ * The 5 LSBs are forced to be zeros by the hardware to align on a 32-byte
+ * boundary; the 5 LSBs are read-only. This field must be programmed to be
+ * 0x0 if the resizer input is from preview engine/CCDC.
+ */
+static void resizer_set_input_offset(struct isp_res_device *res, u32 offset)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        isp_reg_writel(isp, offset, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_INOFF);
+}
+
+/*
+ * resizer_set_intype - Input type select
+ * @res: Device context.
+ * @type: Pixel format type.
+ */
+static void resizer_set_intype(struct isp_res_device *res,
+                               enum resizer_colors_type type)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        if (type == RSZ_COLOR8)
+                isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
+                            ISPRSZ_CNT_INPTYP);
+        else
+                isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
+                            ISPRSZ_CNT_INPTYP);
+}
+
+/*
+ * __resizer_set_inaddr - Helper function for set input address
+ * @res : pointer to resizer private data structure
+ * @addr: input address
+ * return none
+ */
+static void __resizer_set_inaddr(struct isp_res_device *res, u32 addr)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        isp_reg_writel(isp, addr, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_INADD);
+}
+
+/*
+ * The data rate at the horizontal resizer output must not exceed half the
+ * functional clock or 100 MP/s, whichever is lower. According to the TRM
+ * there's no similar requirement for the vertical resizer output. However
+ * experience showed that vertical upscaling by 4 leads to SBL overflows (with
+ * data rates at the resizer output exceeding 300 MP/s). Limiting the resizer
+ * output data rate to the functional clock or 200 MP/s, whichever is lower,
+ * seems to get rid of SBL overflows.
+ *
+ * The maximum data rate at the output of the horizontal resizer can thus be
+ * computed with
+ *
+ * max intermediate rate <= L3 clock * input height / output height
+ * max intermediate rate <= L3 clock / 2
+ *
+ * The maximum data rate at the resizer input is then
+ *
+ * max input rate <= max intermediate rate * input width / output width
+ *
+ * where the input width and height are the resizer input crop rectangle size.
+ * The TRM doesn't clearly explain if that's a maximum instant data rate or a
+ * maximum average data rate.
+ */
+void omap3isp_resizer_max_rate(struct isp_res_device *res,
+                               unsigned int *max_rate)
+{
+        struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
+        const struct v4l2_mbus_framefmt *ofmt = &res->formats[RESZ_PAD_SOURCE];
+        unsigned long limit = min(pipe->l3_ick, 200000000UL);
+        unsigned long clock;
+
+        clock = div_u64((u64)limit * res->crop.active.height, ofmt->height);
+        clock = min(clock, limit / 2);
+        *max_rate = div_u64((u64)clock * res->crop.active.width, ofmt->width);
+}
+
+/*
+ * When the resizer processes images from memory, the driver must slow down read
+ * requests on the input to at least comply with the internal data rate
+ * requirements. If the application real-time requirements can cope with slower
+ * processing, the resizer can be slowed down even more to put less pressure on
+ * the overall system.
+ *
+ * When the resizer processes images on the fly (either from the CCDC or the
+ * preview module), the same data rate requirements apply but they can't be
+ * enforced at the resizer level. The image input module (sensor, CCP2 or
+ * preview module) must not provide image data faster than the resizer can
+ * process.
+ *
+ * For live image pipelines, the data rate is set by the frame format, size and
+ * rate. The sensor output frame rate must not exceed the maximum resizer data
+ * rate.
+ *
+ * The resizer slows down read requests by inserting wait cycles in the SBL
+ * requests. The maximum number of 256-byte requests per second can be computed
+ * as (the data rate is multiplied by 2 to convert from pixels per second to
+ * bytes per second)
+ *
+ * request per second = data rate * 2 / 256
+ * cycles per request = cycles per second / requests per second
+ *
+ * The number of cycles per second is controlled by the L3 clock, leading to
+ *
+ * cycles per request = L3 frequency / 2 * 256 / data rate
+ */
+static void resizer_adjust_bandwidth(struct isp_res_device *res)
+{
+        struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
+        struct isp_device *isp = to_isp_device(res);
+        unsigned long l3_ick = pipe->l3_ick;
+        struct v4l2_fract *timeperframe;
+        unsigned int cycles_per_frame;
+        unsigned int requests_per_frame;
+        unsigned int cycles_per_request;
+        unsigned int granularity;
+        unsigned int minimum;
+        unsigned int maximum;
+        unsigned int value;
+
+        if (res->input != RESIZER_INPUT_MEMORY) {
+                isp_reg_clr(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_SDR_REQ_EXP,
+                            ISPSBL_SDR_REQ_RSZ_EXP_MASK);
+                return;
+        }
+
+        switch (isp->revision) {
+        case ISP_REVISION_1_0:
+        case ISP_REVISION_2_0:
+        default:
+                granularity = 1024;
+                break;
+
+        case ISP_REVISION_15_0:
+                granularity = 32;
+                break;
+        }
+
+        /* Compute the minimum number of cycles per request, based on the
+         * pipeline maximum data rate. This is an absolute lower bound if we
+         * don't want SBL overflows, so round the value up.
+         */
+        cycles_per_request = div_u64((u64)l3_ick / 2 * 256 + pipe->max_rate - 1,
+                                     pipe->max_rate);
+        minimum = DIV_ROUND_UP(cycles_per_request, granularity);
+
+        /* Compute the maximum number of cycles per request, based on the
+         * requested frame rate. This is a soft upper bound to achieve a frame
+         * rate equal or higher than the requested value, so round the value
+         * down.
+         */
+        timeperframe = &pipe->max_timeperframe;
+
+        requests_per_frame = DIV_ROUND_UP(res->crop.active.width * 2, 256)
+                           * res->crop.active.height;
+        cycles_per_frame = div_u64((u64)l3_ick * timeperframe->numerator,
+                                   timeperframe->denominator);
+        cycles_per_request = cycles_per_frame / requests_per_frame;
+
+        maximum = cycles_per_request / granularity;
+
+        value = max(minimum, maximum);
+
+        dev_dbg(isp->dev, "%s: cycles per request = %u\n", __func__, value);
+        isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_SDR_REQ_EXP,
+                        ISPSBL_SDR_REQ_RSZ_EXP_MASK,
+                        value << ISPSBL_SDR_REQ_RSZ_EXP_SHIFT);
+}
+
+/*
+ * omap3isp_resizer_busy - Checks if ISP resizer is busy.
+ *
+ * Returns busy field from ISPRSZ_PCR register.
+ */
+int omap3isp_resizer_busy(struct isp_res_device *res)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        return isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_PCR) &
+                             ISPRSZ_PCR_BUSY;
+}
+
+/*
+ * resizer_set_inaddr - Sets the memory address of the input frame.
+ * @addr: 32bit memory address aligned on 32byte boundary.
+ */
+static void resizer_set_inaddr(struct isp_res_device *res, u32 addr)
+{
+        res->addr_base = addr;
+
+        /* This will handle crop settings in stream off state */
+        if (res->crop_offset)
+                addr += res->crop_offset & ~0x1f;
+
+        __resizer_set_inaddr(res, addr);
+}
+
+/*
+ * Configures the memory address to which the output frame is written.
+ * @addr: 32bit memory address aligned on 32byte boundary.
+ * Note: For SBL efficiency reasons the address should be on a 256-byte
+ * boundary.
+ */
+static void resizer_set_outaddr(struct isp_res_device *res, u32 addr)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        /*
+         * Set output address. This needs to be in its own function
+         * because it changes often.
+         */
+        isp_reg_writel(isp, addr << ISPRSZ_SDR_OUTADD_ADDR_SHIFT,
+                       OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_OUTADD);
+}
+
+/*
+ * resizer_print_status - Prints the values of the resizer module registers.
+ */
+#define RSZ_PRINT_REGISTER(isp, name)\
+        dev_dbg(isp->dev, "###RSZ " #name "=0x%08x\n", \
+                isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_##name))
+
+static void resizer_print_status(struct isp_res_device *res)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        dev_dbg(isp->dev, "-------------Resizer Register dump----------\n");
+
+        RSZ_PRINT_REGISTER(isp, PCR);
+        RSZ_PRINT_REGISTER(isp, CNT);
+        RSZ_PRINT_REGISTER(isp, OUT_SIZE);
+        RSZ_PRINT_REGISTER(isp, IN_START);
+        RSZ_PRINT_REGISTER(isp, IN_SIZE);
+        RSZ_PRINT_REGISTER(isp, SDR_INADD);
+        RSZ_PRINT_REGISTER(isp, SDR_INOFF);
+        RSZ_PRINT_REGISTER(isp, SDR_OUTADD);
+        RSZ_PRINT_REGISTER(isp, SDR_OUTOFF);
+        RSZ_PRINT_REGISTER(isp, YENH);
+
+        dev_dbg(isp->dev, "--------------------------------------------\n");
+}
+
+/*
+ * resizer_calc_ratios - Helper function for calculate resizer ratios
+ * @res: pointer to resizer private data structure
+ * @input: input frame size
+ * @output: output frame size
+ * @ratio : return calculated ratios
+ * return none
+ *
+ * The resizer uses a polyphase sample rate converter. The upsampling filter
+ * has a fixed number of phases that depend on the resizing ratio. As the ratio
+ * computation depends on the number of phases, we need to compute a first
+ * approximation and then refine it.
+ *
+ * The input/output/ratio relationship is given by the OMAP34xx TRM:
+ *
+ * - 8-phase, 4-tap mode (RSZ = 64 ~ 512)
+ *      iw = (32 * sph + (ow - 1) * hrsz + 16) >> 8 + 7
+ *      ih = (32 * spv + (oh - 1) * vrsz + 16) >> 8 + 4
+ * - 4-phase, 7-tap mode (RSZ = 513 ~ 1024)
+ *      iw = (64 * sph + (ow - 1) * hrsz + 32) >> 8 + 7
+ *      ih = (64 * spv + (oh - 1) * vrsz + 32) >> 8 + 7
+ *
+ * iw and ih are the input width and height after cropping. Those equations need
+ * to be satisfied exactly for the resizer to work correctly.
+ *
+ * The equations can't be easily reverted, as the >> 8 operation is not linear.
+ * In addition, not all input sizes can be achieved for a given output size. To
+ * get the highest input size lower than or equal to the requested input size,
+ * we need to compute the highest resizing ratio that satisfies the following
+ * inequality (taking the 4-tap mode width equation as an example)
+ *
+ *      iw >= (32 * sph + (ow - 1) * hrsz + 16) >> 8 - 7
+ *
+ * (where iw is the requested input width) which can be rewritten as
+ *
+ *        iw - 7            >= (32 * sph + (ow - 1) * hrsz + 16) >> 8
+ *       (iw - 7) << 8      >=  32 * sph + (ow - 1) * hrsz + 16 - b
+ *      ((iw - 7) << 8) + b >=  32 * sph + (ow - 1) * hrsz + 16
+ *
+ * where b is the value of the 8 least significant bits of the right hand side
+ * expression of the last inequality. The highest resizing ratio value will be
+ * achieved when b is equal to its maximum value of 255. That resizing ratio
+ * value will still satisfy the original inequality, as b will disappear when
+ * the expression will be shifted right by 8.
+ *
+ * The reverted the equations thus become
+ *
+ * - 8-phase, 4-tap mode
+ *      hrsz = ((iw - 7) * 256 + 255 - 16 - 32 * sph) / (ow - 1)
+ *      vrsz = ((ih - 4) * 256 + 255 - 16 - 32 * spv) / (oh - 1)
+ * - 4-phase, 7-tap mode
+ *      hrsz = ((iw - 7) * 256 + 255 - 32 - 64 * sph) / (ow - 1)
+ *      vrsz = ((ih - 7) * 256 + 255 - 32 - 64 * spv) / (oh - 1)
+ *
+ * The ratios are integer values, and are rounded down to ensure that the
+ * cropped input size is not bigger than the uncropped input size.
+ *
+ * As the number of phases/taps, used to select the correct equations to compute
+ * the ratio, depends on the ratio, we start with the 4-tap mode equations to
+ * compute an approximation of the ratio, and switch to the 7-tap mode equations
+ * if the approximation is higher than the ratio threshold.
+ *
+ * As the 7-tap mode equations will return a ratio smaller than or equal to the
+ * 4-tap mode equations, the resulting ratio could become lower than or equal to
+ * the ratio threshold. This 'equations loop' isn't an issue as long as the
+ * correct equations are used to compute the final input size. Starting with the
+ * 4-tap mode equations ensure that, in case of values resulting in a 'ratio
+ * loop', the smallest of the ratio values will be used, never exceeding the
+ * requested input size.
+ *
+ * We first clamp the output size according to the hardware capabilitie to avoid
+ * auto-cropping the input more than required to satisfy the TRM equations. The
+ * minimum output size is achieved with a scaling factor of 1024. It is thus
+ * computed using the 7-tap equations.
+ *
+ *      min ow = ((iw - 7) * 256 - 32 - 64 * sph) / 1024 + 1
+ *      min oh = ((ih - 7) * 256 - 32 - 64 * spv) / 1024 + 1
+ *
+ * Similarly, the maximum output size is achieved with a scaling factor of 64
+ * and computed using the 4-tap equations.
+ *
+ *      max ow = ((iw - 7) * 256 + 255 - 16 - 32 * sph) / 64 + 1
+ *      max oh = ((ih - 4) * 256 + 255 - 16 - 32 * spv) / 64 + 1
+ *
+ * The additional +255 term compensates for the round down operation performed
+ * by the TRM equations when shifting the value right by 8 bits.
+ *
+ * We then compute and clamp the ratios (x1/4 ~ x4). Clamping the output size to
+ * the maximum value guarantees that the ratio value will never be smaller than
+ * the minimum, but it could still slightly exceed the maximum. Clamping the
+ * ratio will thus result in a resizing factor slightly larger than the
+ * requested value.
+ *
+ * To accommodate that, and make sure the TRM equations are satisfied exactly, we
+ * compute the input crop rectangle as the last step.
+ *
+ * As if the situation wasn't complex enough, the maximum output width depends
+ * on the vertical resizing ratio.  Fortunately, the output height doesn't
+ * depend on the horizontal resizing ratio. We can then start by computing the
+ * output height and the vertical ratio, and then move to computing the output
+ * width and the horizontal ratio.
+ */
+static void resizer_calc_ratios(struct isp_res_device *res,
+                                struct v4l2_rect *input,
+                                struct v4l2_mbus_framefmt *output,
+                                struct resizer_ratio *ratio)
+{
+        struct isp_device *isp = to_isp_device(res);
+        const unsigned int spv = DEFAULT_PHASE;
+        const unsigned int sph = DEFAULT_PHASE;
+        unsigned int upscaled_width;
+        unsigned int upscaled_height;
+        unsigned int min_width;
+        unsigned int min_height;
+        unsigned int max_width;
+        unsigned int max_height;
+        unsigned int width_alignment;
+        unsigned int width;
+        unsigned int height;
+
+        /*
+         * Clamp the output height based on the hardware capabilities and
+         * compute the vertical resizing ratio.
+         */
+        min_height = ((input->height - 7) * 256 - 32 - 64 * spv) / 1024 + 1;
+        min_height = max_t(unsigned int, min_height, MIN_OUT_HEIGHT);
+        max_height = ((input->height - 4) * 256 + 255 - 16 - 32 * spv) / 64 + 1;
+        max_height = min_t(unsigned int, max_height, MAX_OUT_HEIGHT);
+        output->height = clamp(output->height, min_height, max_height);
+
+        ratio->vert = ((input->height - 4) * 256 + 255 - 16 - 32 * spv)
+                    / (output->height - 1);
+        if (ratio->vert > MID_RESIZE_VALUE)
+                ratio->vert = ((input->height - 7) * 256 + 255 - 32 - 64 * spv)
+                            / (output->height - 1);
+        ratio->vert = clamp_t(unsigned int, ratio->vert,
+                              MIN_RESIZE_VALUE, MAX_RESIZE_VALUE);
+
+        if (ratio->vert <= MID_RESIZE_VALUE) {
+                upscaled_height = (output->height - 1) * ratio->vert
+                                + 32 * spv + 16;
+                height = (upscaled_height >> 8) + 4;
+        } else {
+                upscaled_height = (output->height - 1) * ratio->vert
+                                + 64 * spv + 32;
+                height = (upscaled_height >> 8) + 7;
+        }
+
+        /*
+         * Compute the minimum and maximum output widths based on the hardware
+         * capabilities. The maximum depends on the vertical resizing ratio.
+         */
+        min_width = ((input->width - 7) * 256 - 32 - 64 * sph) / 1024 + 1;
+        min_width = max_t(unsigned int, min_width, MIN_OUT_WIDTH);
+
+        if (ratio->vert <= MID_RESIZE_VALUE) {
+                switch (isp->revision) {
+                case ISP_REVISION_1_0:
+                        max_width = MAX_4TAP_OUT_WIDTH_ES1;
+                        break;
+
+                case ISP_REVISION_2_0:
+                default:
+                        max_width = MAX_4TAP_OUT_WIDTH_ES2;
+                        break;
+
+                case ISP_REVISION_15_0:
+                        max_width = MAX_4TAP_OUT_WIDTH_3630;
+                        break;
+                }
+        } else {
+                switch (isp->revision) {
+                case ISP_REVISION_1_0:
+                        max_width = MAX_7TAP_OUT_WIDTH_ES1;
+                        break;
+
+                case ISP_REVISION_2_0:
+                default:
+                        max_width = MAX_7TAP_OUT_WIDTH_ES2;
+                        break;
+
+                case ISP_REVISION_15_0:
+                        max_width = MAX_7TAP_OUT_WIDTH_3630;
+                        break;
+                }
+        }
+        max_width = min(((input->width - 7) * 256 + 255 - 16 - 32 * sph) / 64
+                        + 1, max_width);
+
+        /*
+         * The output width must be even, and must be a multiple of 16 bytes
+         * when upscaling vertically. Clamp the output width to the valid range.
+         * Take the alignment into account (the maximum width in 7-tap mode on
+         * ES2 isn't a multiple of 8) and align the result up to make sure it
+         * won't be smaller than the minimum.
+         */
+        width_alignment = ratio->vert < 256 ? 8 : 2;
+        output->width = clamp(output->width, min_width,
+                              max_width & ~(width_alignment - 1));
+        output->width = ALIGN(output->width, width_alignment);
+
+        ratio->horz = ((input->width - 7) * 256 + 255 - 16 - 32 * sph)
+                    / (output->width - 1);
+        if (ratio->horz > MID_RESIZE_VALUE)
+                ratio->horz = ((input->width - 7) * 256 + 255 - 32 - 64 * sph)
+                            / (output->width - 1);
+        ratio->horz = clamp_t(unsigned int, ratio->horz,
+                              MIN_RESIZE_VALUE, MAX_RESIZE_VALUE);
+
+        if (ratio->horz <= MID_RESIZE_VALUE) {
+                upscaled_width = (output->width - 1) * ratio->horz
+                               + 32 * sph + 16;
+                width = (upscaled_width >> 8) + 7;
+        } else {
+                upscaled_width = (output->width - 1) * ratio->horz
+                               + 64 * sph + 32;
+                width = (upscaled_width >> 8) + 7;
+        }
+
+        /* Center the new crop rectangle. */
+        input->left += (input->width - width) / 2;
+        input->top += (input->height - height) / 2;
+        input->width = width;
+        input->height = height;
+}
+
+/*
+ * resizer_set_crop_params - Setup hardware with cropping parameters
+ * @res : resizer private structure
+ * @crop_rect : current crop rectangle
+ * @ratio : resizer ratios
+ * return none
+ */
+static void resizer_set_crop_params(struct isp_res_device *res,
+                                    const struct v4l2_mbus_framefmt *input,
+                                    const struct v4l2_mbus_framefmt *output)
+{
+        resizer_set_ratio(res, &res->ratio);
+
+        /* Set chrominance horizontal algorithm */
+        if (res->ratio.horz >= RESIZE_DIVISOR)
+                resizer_set_bilinear(res, RSZ_THE_SAME);
+        else
+                resizer_set_bilinear(res, RSZ_BILINEAR);
+
+        resizer_adjust_bandwidth(res);
+
+        if (res->input == RESIZER_INPUT_MEMORY) {
+                /* Calculate additional offset for crop */
+                res->crop_offset = (res->crop.active.top * input->width +
+                                    res->crop.active.left) * 2;
+                /*
+                 * Write lowest 4 bits of horizontal pixel offset (in pixels),
+                 * vertical start must be 0.
+                 */
+                resizer_set_start(res, (res->crop_offset / 2) & 0xf, 0);
+
+                /*
+                 * Set start (read) address for cropping, in bytes.
+                 * Lowest 5 bits must be zero.
+                 */
+                __resizer_set_inaddr(res,
+                                res->addr_base + (res->crop_offset & ~0x1f));
+        } else {
+                /*
+                 * Set vertical start line and horizontal starting pixel.
+                 * If the input is from CCDC/PREV, horizontal start field is
+                 * in bytes (twice number of pixels).
+                 */
+                resizer_set_start(res, res->crop.active.left * 2,
+                                  res->crop.active.top);
+                /* Input address and offset must be 0 for preview/ccdc input */
+                __resizer_set_inaddr(res, 0);
+                resizer_set_input_offset(res, 0);
+        }
+
+        /* Set the input size */
+        resizer_set_input_size(res, res->crop.active.width,
+                               res->crop.active.height);
+}
+
+static void resizer_configure(struct isp_res_device *res)
+{
+        struct v4l2_mbus_framefmt *informat, *outformat;
+        struct resizer_luma_yenh luma = {0, 0, 0, 0};
+
+        resizer_set_source(res, res->input);
+
+        informat = &res->formats[RESZ_PAD_SINK];
+        outformat = &res->formats[RESZ_PAD_SOURCE];
+
+        /* RESZ_PAD_SINK */
+        if (res->input == RESIZER_INPUT_VP)
+                resizer_set_input_offset(res, 0);
+        else
+                resizer_set_input_offset(res, ALIGN(informat->width, 0x10) * 2);
+
+        /* YUV422 interleaved, default phase, no luma enhancement */
+        resizer_set_intype(res, RSZ_YUV422);
+        resizer_set_ycpos(res, informat->code);
+        resizer_set_phase(res, DEFAULT_PHASE, DEFAULT_PHASE);
+        resizer_set_luma(res, &luma);
+
+        /* RESZ_PAD_SOURCE */
+        resizer_set_output_offset(res, ALIGN(outformat->width * 2, 32));
+        resizer_set_output_size(res, outformat->width, outformat->height);
+
+        resizer_set_crop_params(res, informat, outformat);
+}
+
+/* -----------------------------------------------------------------------------
+ * Interrupt handling
+ */
+
+static void resizer_enable_oneshot(struct isp_res_device *res)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_PCR,
+                    ISPRSZ_PCR_ENABLE | ISPRSZ_PCR_ONESHOT);
+}
+
+void omap3isp_resizer_isr_frame_sync(struct isp_res_device *res)
+{
+        /*
+         * If ISP_VIDEO_DMAQUEUE_QUEUED is set, DMA queue had an underrun
+         * condition, the module was paused and now we have a buffer queued
+         * on the output again. Restart the pipeline if running in continuous
+         * mode.
+         */
+        if (res->state == ISP_PIPELINE_STREAM_CONTINUOUS &&
+            res->video_out.dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED) {
+                resizer_enable_oneshot(res);
+                isp_video_dmaqueue_flags_clr(&res->video_out);
+        }
+}
+
+static void resizer_isr_buffer(struct isp_res_device *res)
+{
+        struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
+        struct isp_buffer *buffer;
+        int restart = 0;
+
+        if (res->state == ISP_PIPELINE_STREAM_STOPPED)
+                return;
+
+        /* Complete the output buffer and, if reading from memory, the input
+         * buffer.
+         */
+        buffer = omap3isp_video_buffer_next(&res->video_out, res->error);
+        if (buffer != NULL) {
+                resizer_set_outaddr(res, buffer->isp_addr);
+                restart = 1;
+        }
+
+        pipe->state |= ISP_PIPELINE_IDLE_OUTPUT;
+
+        if (res->input == RESIZER_INPUT_MEMORY) {
+                buffer = omap3isp_video_buffer_next(&res->video_in, 0);
+                if (buffer != NULL)
+                        resizer_set_inaddr(res, buffer->isp_addr);
+                pipe->state |= ISP_PIPELINE_IDLE_INPUT;
+        }
+
+        if (res->state == ISP_PIPELINE_STREAM_SINGLESHOT) {
+                if (isp_pipeline_ready(pipe))
+                        omap3isp_pipeline_set_stream(pipe,
+                                                ISP_PIPELINE_STREAM_SINGLESHOT);
+        } else {
+                /* If an underrun occurs, the video queue operation handler will
+                 * restart the resizer. Otherwise restart it immediately.
+                 */
+                if (restart)
+                        resizer_enable_oneshot(res);
+        }
+
+        res->error = 0;
+}
+
+/*
+ * omap3isp_resizer_isr - ISP resizer interrupt handler
+ *
+ * Manage the resizer video buffers and configure shadowed and busy-locked
+ * registers.
+ */
+void omap3isp_resizer_isr(struct isp_res_device *res)
+{
+        struct v4l2_mbus_framefmt *informat, *outformat;
+
+        if (omap3isp_module_sync_is_stopping(&res->wait, &res->stopping))
+                return;
+
+        if (res->applycrop) {
+                outformat = __resizer_get_format(res, NULL, RESZ_PAD_SOURCE,
+                                              V4L2_SUBDEV_FORMAT_ACTIVE);
+                informat = __resizer_get_format(res, NULL, RESZ_PAD_SINK,
+                                              V4L2_SUBDEV_FORMAT_ACTIVE);
+                resizer_set_crop_params(res, informat, outformat);
+                res->applycrop = 0;
+        }
+
+        resizer_isr_buffer(res);
+}
+
+/* -----------------------------------------------------------------------------
+ * ISP video operations
+ */
+
+static int resizer_video_queue(struct isp_video *video,
+                               struct isp_buffer *buffer)
+{
+        struct isp_res_device *res = &video->isp->isp_res;
+
+        if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+                resizer_set_inaddr(res, buffer->isp_addr);
+
+        /*
+         * We now have a buffer queued on the output. Despite what the
+         * TRM says, the resizer can't be restarted immediately.
+         * Enabling it in one shot mode in the middle of a frame (or at
+         * least asynchronously to the frame) results in the output
+         * being shifted randomly left/right and up/down, as if the
+         * hardware didn't synchronize itself to the beginning of the
+         * frame correctly.
+         *
+         * Restart the resizer on the next sync interrupt if running in
+         * continuous mode or when starting the stream.
+         */
+        if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+                resizer_set_outaddr(res, buffer->isp_addr);
+
+        return 0;
+}
+
+static const struct isp_video_operations resizer_video_ops = {
+        .queue = resizer_video_queue,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev operations
+ */
+
+/*
+ * resizer_set_stream - Enable/Disable streaming on resizer subdev
+ * @sd: ISP resizer V4L2 subdev
+ * @enable: 1 == Enable, 0 == Disable
+ *
+ * The resizer hardware can't be enabled without a memory buffer to write to.
+ * As the s_stream operation is called in response to a STREAMON call without
+ * any buffer queued yet, just update the state field and return immediately.
+ * The resizer will be enabled in resizer_video_queue().
+ */
+static int resizer_set_stream(struct v4l2_subdev *sd, int enable)
+{
+        struct isp_res_device *res = v4l2_get_subdevdata(sd);
+        struct isp_video *video_out = &res->video_out;
+        struct isp_device *isp = to_isp_device(res);
+        struct device *dev = to_device(res);
+
+        if (res->state == ISP_PIPELINE_STREAM_STOPPED) {
+                if (enable == ISP_PIPELINE_STREAM_STOPPED)
+                        return 0;
+
+                omap3isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_RESIZER);
+                resizer_configure(res);
+                res->error = 0;
+                resizer_print_status(res);
+        }
+
+        switch (enable) {
+        case ISP_PIPELINE_STREAM_CONTINUOUS:
+                omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_WRITE);
+                if (video_out->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED) {
+                        resizer_enable_oneshot(res);
+                        isp_video_dmaqueue_flags_clr(video_out);
+                }
+                break;
+
+        case ISP_PIPELINE_STREAM_SINGLESHOT:
+                if (res->input == RESIZER_INPUT_MEMORY)
+                        omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_READ);
+                omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_WRITE);
+
+                resizer_enable_oneshot(res);
+                break;
+
+        case ISP_PIPELINE_STREAM_STOPPED:
+                if (omap3isp_module_sync_idle(&sd->entity, &res->wait,
+                                              &res->stopping))
+                        dev_dbg(dev, "%s: module stop timeout.\n", sd->name);
+                omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_RESIZER_READ |
+                                OMAP3_ISP_SBL_RESIZER_WRITE);
+                omap3isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_RESIZER);
+                isp_video_dmaqueue_flags_clr(video_out);
+                break;
+        }
+
+        res->state = enable;
+        return 0;
+}
+
+/*
+ * resizer_g_crop - handle get crop subdev operation
+ * @sd : pointer to v4l2 subdev structure
+ * @pad : subdev pad
+ * @crop : pointer to crop structure
+ * @which : active or try format
+ * return zero
+ */
+static int resizer_g_crop(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+                          struct v4l2_subdev_crop *crop)
+{
+        struct isp_res_device *res = v4l2_get_subdevdata(sd);
+        struct v4l2_mbus_framefmt *format;
+        struct resizer_ratio ratio;
+
+        /* Only sink pad has crop capability */
+        if (crop->pad != RESZ_PAD_SINK)
+                return -EINVAL;
+
+        format = __resizer_get_format(res, fh, RESZ_PAD_SOURCE, crop->which);
+        crop->rect = *__resizer_get_crop(res, fh, crop->which);
+        resizer_calc_ratios(res, &crop->rect, format, &ratio);
+
+        return 0;
+}
+
+/*
+ * resizer_try_crop - mangles crop parameters.
+ */
+static void resizer_try_crop(const struct v4l2_mbus_framefmt *sink,
+                             const struct v4l2_mbus_framefmt *source,
+                             struct v4l2_rect *crop)
+{
+        const unsigned int spv = DEFAULT_PHASE;
+        const unsigned int sph = DEFAULT_PHASE;
+
+        /* Crop rectangle is constrained to the output size so that zoom ratio
+         * cannot exceed +/-4.0.
+         */
+        unsigned int min_width =
+                ((32 * sph + (source->width - 1) * 64 + 16) >> 8) + 7;
+        unsigned int min_height =
+                ((32 * spv + (source->height - 1) * 64 + 16) >> 8) + 4;
+        unsigned int max_width =
+                ((64 * sph + (source->width - 1) * 1024 + 32) >> 8) + 7;
+        unsigned int max_height =
+                ((64 * spv + (source->height - 1) * 1024 + 32) >> 8) + 7;
+
+        crop->width = clamp_t(u32, crop->width, min_width, max_width);
+        crop->height = clamp_t(u32, crop->height, min_height, max_height);
+
+        /* Crop can not go beyond of the input rectangle */
+        crop->left = clamp_t(u32, crop->left, 0, sink->width - MIN_IN_WIDTH);
+        crop->width = clamp_t(u32, crop->width, MIN_IN_WIDTH,
+                              sink->width - crop->left);
+        crop->top = clamp_t(u32, crop->top, 0, sink->height - MIN_IN_HEIGHT);
+        crop->height = clamp_t(u32, crop->height, MIN_IN_HEIGHT,
+                               sink->height - crop->top);
+}
+
+/*
+ * resizer_s_crop - handle set crop subdev operation
+ * @sd : pointer to v4l2 subdev structure
+ * @pad : subdev pad
+ * @crop : pointer to crop structure
+ * @which : active or try format
+ * return -EINVAL or zero when succeed
+ */
+static int resizer_s_crop(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+                          struct v4l2_subdev_crop *crop)
+{
+        struct isp_res_device *res = v4l2_get_subdevdata(sd);
+        struct isp_device *isp = to_isp_device(res);
+        struct v4l2_mbus_framefmt *format_sink, *format_source;
+        struct resizer_ratio ratio;
+
+        /* Only sink pad has crop capability */
+        if (crop->pad != RESZ_PAD_SINK)
+                return -EINVAL;
+
+        format_sink = __resizer_get_format(res, fh, RESZ_PAD_SINK,
+                                           crop->which);
+        format_source = __resizer_get_format(res, fh, RESZ_PAD_SOURCE,
+                                             crop->which);
+
+        dev_dbg(isp->dev, "%s: L=%d,T=%d,W=%d,H=%d,which=%d\n", __func__,
+                crop->rect.left, crop->rect.top, crop->rect.width,
+                crop->rect.height, crop->which);
+
+        dev_dbg(isp->dev, "%s: input=%dx%d, output=%dx%d\n", __func__,
+                format_sink->width, format_sink->height,
+                format_source->width, format_source->height);
+
+        resizer_try_crop(format_sink, format_source, &crop->rect);
+        *__resizer_get_crop(res, fh, crop->which) = crop->rect;
+        resizer_calc_ratios(res, &crop->rect, format_source, &ratio);
+
+        if (crop->which == V4L2_SUBDEV_FORMAT_TRY)
+                return 0;
+
+        res->ratio = ratio;
+        res->crop.active = crop->rect;
+
+        /*
+         * s_crop can be called while streaming is on. In this case
+         * the crop values will be set in the next IRQ.
+         */
+        if (res->state != ISP_PIPELINE_STREAM_STOPPED)
+                res->applycrop = 1;
+
+        return 0;
+}
+
+/* resizer pixel formats */
+static const unsigned int resizer_formats[] = {
+        V4L2_MBUS_FMT_UYVY8_1X16,
+        V4L2_MBUS_FMT_YUYV8_1X16,
+};
+
+static unsigned int resizer_max_in_width(struct isp_res_device *res)
+{
+        struct isp_device *isp = to_isp_device(res);
+
+        if (res->input == RESIZER_INPUT_MEMORY) {
+                return MAX_IN_WIDTH_MEMORY_MODE;
+        } else {
+                if (isp->revision == ISP_REVISION_1_0)
+                        return MAX_IN_WIDTH_ONTHEFLY_MODE_ES1;
+                else
+                        return MAX_IN_WIDTH_ONTHEFLY_MODE_ES2;
+        }
+}
+
+/*
+ * resizer_try_format - Handle try format by pad subdev method
+ * @res   : ISP resizer device
+ * @fh    : V4L2 subdev file handle
+ * @pad   : pad num
+ * @fmt   : pointer to v4l2 format structure
+ * @which : wanted subdev format
+ */
+static void resizer_try_format(struct isp_res_device *res,
+                               struct v4l2_subdev_fh *fh, unsigned int pad,
+                               struct v4l2_mbus_framefmt *fmt,
+                               enum v4l2_subdev_format_whence which)
+{
+        struct v4l2_mbus_framefmt *format;
+        struct resizer_ratio ratio;
+        struct v4l2_rect crop;
+
+        switch (pad) {
+        case RESZ_PAD_SINK:
+                if (fmt->code != V4L2_MBUS_FMT_YUYV8_1X16 &&
+                    fmt->code != V4L2_MBUS_FMT_UYVY8_1X16)
+                        fmt->code = V4L2_MBUS_FMT_YUYV8_1X16;
+
+                fmt->width = clamp_t(u32, fmt->width, MIN_IN_WIDTH,
+                                     resizer_max_in_width(res));
+                fmt->height = clamp_t(u32, fmt->height, MIN_IN_HEIGHT,
+                                      MAX_IN_HEIGHT);
+                break;
+
+        case RESZ_PAD_SOURCE:
+                format = __resizer_get_format(res, fh, RESZ_PAD_SINK, which);
+                fmt->code = format->code;
+
+                crop = *__resizer_get_crop(res, fh, which);
+                resizer_calc_ratios(res, &crop, fmt, &ratio);
+                break;
+        }
+
+        fmt->colorspace = V4L2_COLORSPACE_JPEG;
+        fmt->field = V4L2_FIELD_NONE;
+}
+
+/*
+ * resizer_enum_mbus_code - Handle pixel format enumeration
+ * @sd     : pointer to v4l2 subdev structure
+ * @fh     : V4L2 subdev file handle
+ * @code   : pointer to v4l2_subdev_mbus_code_enum structure
+ * return -EINVAL or zero on success
+ */
+static int resizer_enum_mbus_code(struct v4l2_subdev *sd,
+                                  struct v4l2_subdev_fh *fh,
+                                  struct v4l2_subdev_mbus_code_enum *code)
+{
+        struct isp_res_device *res = v4l2_get_subdevdata(sd);
+        struct v4l2_mbus_framefmt *format;
+
+        if (code->pad == RESZ_PAD_SINK) {
+                if (code->index >= ARRAY_SIZE(resizer_formats))
+                        return -EINVAL;
+
+                code->code = resizer_formats[code->index];
+        } else {
+                if (code->index != 0)
+                        return -EINVAL;
+
+                format = __resizer_get_format(res, fh, RESZ_PAD_SINK,
+                                              V4L2_SUBDEV_FORMAT_TRY);
+                code->code = format->code;
+        }
+
+        return 0;
+}
+
+static int resizer_enum_frame_size(struct v4l2_subdev *sd,
+                                   struct v4l2_subdev_fh *fh,
+                                   struct v4l2_subdev_frame_size_enum *fse)
+{
+        struct isp_res_device *res = v4l2_get_subdevdata(sd);
+        struct v4l2_mbus_framefmt format;
+
+        if (fse->index != 0)
+                return -EINVAL;
+
+        format.code = fse->code;
+        format.width = 1;
+        format.height = 1;
+        resizer_try_format(res, 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(res, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+        fse->max_width = format.width;
+        fse->max_height = format.height;
+
+        return 0;
+}
+
+/*
+ * resizer_get_format - Handle get 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_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+                              struct v4l2_subdev_format *fmt)
+{
+        struct isp_res_device *res = v4l2_get_subdevdata(sd);
+        struct v4l2_mbus_framefmt *format;
+
+        format = __resizer_get_format(res, fh, fmt->pad, fmt->which);
+        if (format == NULL)
+                return -EINVAL;
+
+        fmt->format = *format;
+        return 0;
+}
+
+/*
+ * 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 isp_res_device *res = v4l2_get_subdevdata(sd);
+        struct v4l2_mbus_framefmt *format;
+        struct v4l2_rect *crop;
+
+        format = __resizer_get_format(res, fh, fmt->pad, fmt->which);
+        if (format == NULL)
+                return -EINVAL;
+
+        resizer_try_format(res, fh, fmt->pad, &fmt->format, fmt->which);
+        *format = fmt->format;
+
+        if (fmt->pad == RESZ_PAD_SINK) {
+                /* reset crop rectangle */
+                crop = __resizer_get_crop(res, fh, fmt->which);
+                crop->left = 0;
+                crop->top = 0;
+                crop->width = fmt->format.width;
+                crop->height = fmt->format.height;
+
+                /* Propagate the format from sink to source */
+                format = __resizer_get_format(res, fh, RESZ_PAD_SOURCE,
+                                              fmt->which);
+                *format = fmt->format;
+                resizer_try_format(res, fh, RESZ_PAD_SOURCE, format,
+                                   fmt->which);
+        }
+
+        if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+                /* Compute and store the active crop rectangle and resizer
+                 * ratios. format already points to the source pad active
+                 * format.
+                 */
+                res->crop.active = res->crop.request;
+                resizer_calc_ratios(res, &res->crop.active, format,
+                                       &res->ratio);
+        }
+
+        return 0;
+}
+
+/*
+ * resizer_init_formats - Initialize formats on all pads
+ * @sd: ISP resizer V4L2 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)
+{
+        struct v4l2_subdev_format format;
+
+        memset(&format, 0, sizeof(format));
+        format.pad = RESZ_PAD_SINK;
+        format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
+        format.format.code = V4L2_MBUS_FMT_YUYV8_1X16;
+        format.format.width = 4096;
+        format.format.height = 4096;
+        resizer_set_format(sd, fh, &format);
+
+        return 0;
+}
+
+/* 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,
+        .get_crop = resizer_g_crop,
+        .set_crop = resizer_s_crop,
+};
+
+/* subdev operations */
+static const struct v4l2_subdev_ops resizer_v4l2_ops = {
+        .video = &resizer_v4l2_video_ops,
+        .pad = &resizer_v4l2_pad_ops,
+};
+
+/* subdev internal operations */
+static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = {
+        .open = resizer_init_formats,
+};
+
+/* -----------------------------------------------------------------------------
+ * 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 isp_res_device *res = v4l2_get_subdevdata(sd);
+
+        switch (local->index | media_entity_type(remote->entity)) {
+        case RESZ_PAD_SINK | MEDIA_ENT_T_DEVNODE:
+                /* read from memory */
+                if (flags & MEDIA_LNK_FL_ENABLED) {
+                        if (res->input == RESIZER_INPUT_VP)
+                                return -EBUSY;
+                        res->input = RESIZER_INPUT_MEMORY;
+                } else {
+                        if (res->input == RESIZER_INPUT_MEMORY)
+                                res->input = RESIZER_INPUT_NONE;
+                }
+                break;
+
+        case RESZ_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
+                /* read from ccdc or previewer */
+                if (flags & MEDIA_LNK_FL_ENABLED) {
+                        if (res->input == RESIZER_INPUT_MEMORY)
+                                return -EBUSY;
+                        res->input = RESIZER_INPUT_VP;
+                } else {
+                        if (res->input == RESIZER_INPUT_VP)
+                                res->input = RESIZER_INPUT_NONE;
+                }
+                break;
+
+        case RESZ_PAD_SOURCE | MEDIA_ENT_T_DEVNODE:
+                /* resizer always write to memory */
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+/* media operations */
+static const struct media_entity_operations resizer_media_ops = {
+        .link_setup = resizer_link_setup,
+};
+
+/*
+ * resizer_init_entities - Initialize resizer subdev and media entity.
+ * @res : Pointer to resizer device structure
+ * return -ENOMEM or zero on success
+ */
+static int resizer_init_entities(struct isp_res_device *res)
+{
+        struct v4l2_subdev *sd = &res->subdev;
+        struct media_pad *pads = res->pads;
+        struct media_entity *me = &sd->entity;
+        int ret;
+
+        res->input = RESIZER_INPUT_NONE;
+
+        v4l2_subdev_init(sd, &resizer_v4l2_ops);
+        sd->internal_ops = &resizer_v4l2_internal_ops;
+        strlcpy(sd->name, "OMAP3 ISP resizer", sizeof(sd->name));
+        sd->grp_id = 1 << 16;   /* group ID for isp subdevs */
+        v4l2_set_subdevdata(sd, res);
+        sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+        pads[RESZ_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+        pads[RESZ_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+
+        me->ops = &resizer_media_ops;
+        ret = media_entity_init(me, RESZ_PADS_NUM, pads, 0);
+        if (ret < 0)
+                return ret;
+
+        resizer_init_formats(sd, NULL);
+
+        res->video_in.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+        res->video_in.ops = &resizer_video_ops;
+        res->video_in.isp = to_isp_device(res);
+        res->video_in.capture_mem = PAGE_ALIGN(4096 * 4096) * 2 * 3;
+        res->video_in.bpl_alignment = 32;
+        res->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+        res->video_out.ops = &resizer_video_ops;
+        res->video_out.isp = to_isp_device(res);
+        res->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 2 * 3;
+        res->video_out.bpl_alignment = 32;
+
+        ret = omap3isp_video_init(&res->video_in, "resizer");
+        if (ret < 0)
+                return ret;
+
+        ret = omap3isp_video_init(&res->video_out, "resizer");
+        if (ret < 0)
+                return ret;
+
+        /* Connect the video nodes to the resizer subdev. */
+        ret = media_entity_create_link(&res->video_in.video.entity, 0,
+                        &res->subdev.entity, RESZ_PAD_SINK, 0);
+        if (ret < 0)
+                return ret;
+
+        ret = media_entity_create_link(&res->subdev.entity, RESZ_PAD_SOURCE,
+                        &res->video_out.video.entity, 0, 0);
+        if (ret < 0)
+                return ret;
+
+        return 0;
+}
+
+void omap3isp_resizer_unregister_entities(struct isp_res_device *res)
+{
+        media_entity_cleanup(&res->subdev.entity);
+
+        v4l2_device_unregister_subdev(&res->subdev);
+        omap3isp_video_unregister(&res->video_in);
+        omap3isp_video_unregister(&res->video_out);
+}
+
+int omap3isp_resizer_register_entities(struct isp_res_device *res,
+                                       struct v4l2_device *vdev)
+{
+        int ret;
+
+        /* Register the subdev and video nodes. */
+        ret = v4l2_device_register_subdev(vdev, &res->subdev);
+        if (ret < 0)
+                goto error;
+
+        ret = omap3isp_video_register(&res->video_in, vdev);
+        if (ret < 0)
+                goto error;
+
+        ret = omap3isp_video_register(&res->video_out, vdev);
+        if (ret < 0)
+                goto error;
+
+        return 0;
+
+error:
+        omap3isp_resizer_unregister_entities(res);
+        return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * ISP resizer initialization and cleanup
+ */
+
+void omap3isp_resizer_cleanup(struct isp_device *isp)
+{
+}
+
+/*
+ * isp_resizer_init - Resizer initialization.
+ * @isp : Pointer to ISP device
+ * return -ENOMEM or zero on success
+ */
+int omap3isp_resizer_init(struct isp_device *isp)
+{
+        struct isp_res_device *res = &isp->isp_res;
+        int ret;
+
+        init_waitqueue_head(&res->wait);
+        atomic_set(&res->stopping, 0);
+        ret = resizer_init_entities(res);
+        if (ret < 0)
+                goto out;
+
+out:
+        if (ret)
+                omap3isp_resizer_cleanup(isp);
+
+        return ret;
+}