Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 1281 insertions, 0 deletions

diff --git a/drivers/media/pci/ivtv/ivtv-yuv.c b/drivers/media/pci/ivtv/ivtv-yuv.c
new file mode 100644
index 0000000000..582146f8d7
--- /dev/null
+++ b/drivers/media/pci/ivtv/ivtv-yuv.c
@@ -0,0 +1,1281 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+    yuv support
+
+    Copyright (C) 2007  Ian Armstrong <ian@iarmst.demon.co.uk>
+
+ */
+
+#include "ivtv-driver.h"
+#include "ivtv-udma.h"
+#include "ivtv-yuv.h"
+
+/* YUV buffer offsets */
+const u32 yuv_offset[IVTV_YUV_BUFFERS] = {
+	0x001a8600,
+	0x00240400,
+	0x002d8200,
+	0x00370000,
+	0x00029000,
+	0x000C0E00,
+	0x006B0400,
+	0x00748200
+};
+
+static int ivtv_yuv_prep_user_dma(struct ivtv *itv, struct ivtv_user_dma *dma,
+				  struct ivtv_dma_frame *args)
+{
+	struct ivtv_dma_page_info y_dma;
+	struct ivtv_dma_page_info uv_dma;
+	struct yuv_playback_info *yi = &itv->yuv_info;
+	u8 frame = yi->draw_frame;
+	struct yuv_frame_info *f = &yi->new_frame_info[frame];
+	int y_pages, uv_pages;
+	unsigned long y_buffer_offset, uv_buffer_offset;
+	int y_decode_height, uv_decode_height, y_size;
+
+	y_buffer_offset = IVTV_DECODER_OFFSET + yuv_offset[frame];
+	uv_buffer_offset = y_buffer_offset + IVTV_YUV_BUFFER_UV_OFFSET;
+
+	y_decode_height = uv_decode_height = f->src_h + f->src_y;
+
+	if (f->offset_y)
+		y_buffer_offset += 720 * 16;
+
+	if (y_decode_height & 15)
+		y_decode_height = (y_decode_height + 16) & ~15;
+
+	if (uv_decode_height & 31)
+		uv_decode_height = (uv_decode_height + 32) & ~31;
+
+	y_size = 720 * y_decode_height;
+
+	/* Still in USE */
+	if (dma->SG_length || dma->page_count) {
+		IVTV_DEBUG_WARN
+		    ("prep_user_dma: SG_length %d page_count %d still full?\n",
+		     dma->SG_length, dma->page_count);
+		return -EBUSY;
+	}
+
+	ivtv_udma_get_page_info (&y_dma, (unsigned long)args->y_source, 720 * y_decode_height);
+	ivtv_udma_get_page_info (&uv_dma, (unsigned long)args->uv_source, 360 * uv_decode_height);
+
+	/* Pin user pages for DMA Xfer */
+	y_pages = pin_user_pages_unlocked(y_dma.uaddr,
+			y_dma.page_count, &dma->map[0], 0);
+	uv_pages = 0; /* silence gcc. value is set and consumed only if: */
+	if (y_pages == y_dma.page_count) {
+		uv_pages = pin_user_pages_unlocked(uv_dma.uaddr,
+				uv_dma.page_count, &dma->map[y_pages], 0);
+	}
+
+	if (y_pages != y_dma.page_count || uv_pages != uv_dma.page_count) {
+		int rc = -EFAULT;
+
+		if (y_pages == y_dma.page_count) {
+			IVTV_DEBUG_WARN
+				("failed to map uv user pages, returned %d expecting %d\n",
+				 uv_pages, uv_dma.page_count);
+
+			if (uv_pages >= 0) {
+				unpin_user_pages(&dma->map[y_pages], uv_pages);
+				rc = -EFAULT;
+			} else {
+				rc = uv_pages;
+			}
+		} else {
+			IVTV_DEBUG_WARN
+				("failed to map y user pages, returned %d expecting %d\n",
+				 y_pages, y_dma.page_count);
+		}
+		if (y_pages >= 0) {
+			unpin_user_pages(dma->map, y_pages);
+			/*
+			 * Inherit the -EFAULT from rc's
+			 * initialization, but allow it to be
+			 * overridden by uv_pages above if it was an
+			 * actual errno.
+			 */
+		} else {
+			rc = y_pages;
+		}
+		return rc;
+	}
+
+	dma->page_count = y_pages + uv_pages;
+
+	/* Fill & map SG List */
+	if (ivtv_udma_fill_sg_list (dma, &uv_dma, ivtv_udma_fill_sg_list (dma, &y_dma, 0)) < 0) {
+		IVTV_DEBUG_WARN("could not allocate bounce buffers for highmem userspace buffers\n");
+		unpin_user_pages(dma->map, dma->page_count);
+		dma->page_count = 0;
+		return -ENOMEM;
+	}
+	dma->SG_length = dma_map_sg(&itv->pdev->dev, dma->SGlist,
+				    dma->page_count, DMA_TO_DEVICE);
+
+	/* Fill SG Array with new values */
+	ivtv_udma_fill_sg_array(dma, y_buffer_offset, uv_buffer_offset, y_size);
+
+	/* If we've offset the y plane, ensure top area is blanked */
+	if (f->offset_y && yi->blanking_dmaptr) {
+		dma->SGarray[dma->SG_length].size = cpu_to_le32(720*16);
+		dma->SGarray[dma->SG_length].src = cpu_to_le32(yi->blanking_dmaptr);
+		dma->SGarray[dma->SG_length].dst = cpu_to_le32(IVTV_DECODER_OFFSET + yuv_offset[frame]);
+		dma->SG_length++;
+	}
+
+	/* Tag SG Array with Interrupt Bit */
+	dma->SGarray[dma->SG_length - 1].size |= cpu_to_le32(0x80000000);
+
+	ivtv_udma_sync_for_device(itv);
+	return 0;
+}
+
+/* We rely on a table held in the firmware - Quick check. */
+int ivtv_yuv_filter_check(struct ivtv *itv)
+{
+	int i, y, uv;
+
+	for (i = 0, y = 16, uv = 4; i < 16; i++, y += 24, uv += 12) {
+		if ((read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + y) != i << 16) ||
+		    (read_dec(IVTV_YUV_VERTICAL_FILTER_OFFSET + uv) != i << 16)) {
+			IVTV_WARN ("YUV filter table not found in firmware.\n");
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static void ivtv_yuv_filter(struct ivtv *itv, int h_filter, int v_filter_1, int v_filter_2)
+{
+	u32 i, line;
+
+	/* If any filter is -1, then don't update it */
+	if (h_filter > -1) {
+		if (h_filter > 4)
+			h_filter = 4;
+		i = IVTV_YUV_HORIZONTAL_FILTER_OFFSET + (h_filter * 384);
+		for (line = 0; line < 16; line++) {
+			write_reg(read_dec(i), 0x02804);
+			write_reg(read_dec(i), 0x0281c);
+			i += 4;
+			write_reg(read_dec(i), 0x02808);
+			write_reg(read_dec(i), 0x02820);
+			i += 4;
+			write_reg(read_dec(i), 0x0280c);
+			write_reg(read_dec(i), 0x02824);
+			i += 4;
+			write_reg(read_dec(i), 0x02810);
+			write_reg(read_dec(i), 0x02828);
+			i += 4;
+			write_reg(read_dec(i), 0x02814);
+			write_reg(read_dec(i), 0x0282c);
+			i += 8;
+			write_reg(0, 0x02818);
+			write_reg(0, 0x02830);
+		}
+		IVTV_DEBUG_YUV("h_filter -> %d\n", h_filter);
+	}
+
+	if (v_filter_1 > -1) {
+		if (v_filter_1 > 4)
+			v_filter_1 = 4;
+		i = IVTV_YUV_VERTICAL_FILTER_OFFSET + (v_filter_1 * 192);
+		for (line = 0; line < 16; line++) {
+			write_reg(read_dec(i), 0x02900);
+			i += 4;
+			write_reg(read_dec(i), 0x02904);
+			i += 8;
+			write_reg(0, 0x02908);
+		}
+		IVTV_DEBUG_YUV("v_filter_1 -> %d\n", v_filter_1);
+	}
+
+	if (v_filter_2 > -1) {
+		if (v_filter_2 > 4)
+			v_filter_2 = 4;
+		i = IVTV_YUV_VERTICAL_FILTER_OFFSET + (v_filter_2 * 192);
+		for (line = 0; line < 16; line++) {
+			write_reg(read_dec(i), 0x0290c);
+			i += 4;
+			write_reg(read_dec(i), 0x02910);
+			i += 8;
+			write_reg(0, 0x02914);
+		}
+		IVTV_DEBUG_YUV("v_filter_2 -> %d\n", v_filter_2);
+	}
+}
+
+static void ivtv_yuv_handle_horizontal(struct ivtv *itv, struct yuv_frame_info *f)
+{
+	struct yuv_playback_info *yi = &itv->yuv_info;
+	u32 reg_2834, reg_2838, reg_283c;
+	u32 reg_2844, reg_2854, reg_285c;
+	u32 reg_2864, reg_2874, reg_2890;
+	u32 reg_2870, reg_2870_base, reg_2870_offset;
+	int x_cutoff;
+	int h_filter;
+	u32 master_width;
+
+	IVTV_DEBUG_WARN
+	    ("Adjust to width %d src_w %d dst_w %d src_x %d dst_x %d\n",
+	     f->tru_w, f->src_w, f->dst_w, f->src_x, f->dst_x);
+
+	/* How wide is the src image */
+	x_cutoff = f->src_w + f->src_x;
+
+	/* Set the display width */
+	reg_2834 = f->dst_w;
+	reg_2838 = reg_2834;
+
+	/* Set the display position */
+	reg_2890 = f->dst_x;
+
+	/* Index into the image horizontally */
+	reg_2870 = 0;
+
+	/* 2870 is normally fudged to align video coords with osd coords.
+	   If running full screen, it causes an unwanted left shift
+	   Remove the fudge if we almost fill the screen.
+	   Gradually adjust the offset to avoid the video 'snapping'
+	   left/right if it gets dragged through this region.
+	   Only do this if osd is full width. */
+	if (f->vis_w == 720) {
+		if ((f->tru_x - f->pan_x > -1) && (f->tru_x - f->pan_x <= 40) && (f->dst_w >= 680))
+			reg_2870 = 10 - (f->tru_x - f->pan_x) / 4;
+		else if ((f->tru_x - f->pan_x < 0) && (f->tru_x - f->pan_x >= -20) && (f->dst_w >= 660))
+			reg_2870 = (10 + (f->tru_x - f->pan_x) / 2);
+
+		if (f->dst_w >= f->src_w)
+			reg_2870 = reg_2870 << 16 | reg_2870;
+		else
+			reg_2870 = ((reg_2870 & ~1) << 15) | (reg_2870 & ~1);
+	}
+
+	if (f->dst_w < f->src_w)
+		reg_2870 = 0x000d000e - reg_2870;
+	else
+		reg_2870 = 0x0012000e - reg_2870;
+
+	/* We're also using 2870 to shift the image left (src_x & negative dst_x) */
+	reg_2870_offset = (f->src_x * ((f->dst_w << 21) / f->src_w)) >> 19;
+
+	if (f->dst_w >= f->src_w) {
+		x_cutoff &= ~1;
+		master_width = (f->src_w * 0x00200000) / (f->dst_w);
+		if (master_width * f->dst_w != f->src_w * 0x00200000)
+			master_width++;
+		reg_2834 = (reg_2834 << 16) | x_cutoff;
+		reg_2838 = (reg_2838 << 16) | x_cutoff;
+		reg_283c = master_width >> 2;
+		reg_2844 = master_width >> 2;
+		reg_2854 = master_width;
+		reg_285c = master_width >> 1;
+		reg_2864 = master_width >> 1;
+
+		/* We also need to factor in the scaling
+		   (src_w - dst_w) / (src_w / 4) */
+		if (f->dst_w > f->src_w)
+			reg_2870_base = ((f->dst_w - f->src_w)<<16) / (f->src_w <<14);
+		else
+			reg_2870_base = 0;
+
+		reg_2870 += (((reg_2870_offset << 14) & 0xFFFF0000) | reg_2870_offset >> 2) + (reg_2870_base << 17 | reg_2870_base);
+		reg_2874 = 0;
+	} else if (f->dst_w < f->src_w / 2) {
+		master_width = (f->src_w * 0x00080000) / f->dst_w;
+		if (master_width * f->dst_w != f->src_w * 0x00080000)
+			master_width++;
+		reg_2834 = (reg_2834 << 16) | x_cutoff;
+		reg_2838 = (reg_2838 << 16) | x_cutoff;
+		reg_283c = master_width >> 2;
+		reg_2844 = master_width >> 1;
+		reg_2854 = master_width;
+		reg_285c = master_width >> 1;
+		reg_2864 = master_width >> 1;
+		reg_2870 += ((reg_2870_offset << 15) & 0xFFFF0000) | reg_2870_offset;
+		reg_2870 += (5 - (((f->src_w + f->src_w / 2) - 1) / f->dst_w)) << 16;
+		reg_2874 = 0x00000012;
+	} else {
+		master_width = (f->src_w * 0x00100000) / f->dst_w;
+		if (master_width * f->dst_w != f->src_w * 0x00100000)
+			master_width++;
+		reg_2834 = (reg_2834 << 16) | x_cutoff;
+		reg_2838 = (reg_2838 << 16) | x_cutoff;
+		reg_283c = master_width >> 2;
+		reg_2844 = master_width >> 1;
+		reg_2854 = master_width;
+		reg_285c = master_width >> 1;
+		reg_2864 = master_width >> 1;
+		reg_2870 += ((reg_2870_offset << 14) & 0xFFFF0000) | reg_2870_offset >> 1;
+		reg_2870 += (5 - (((f->src_w * 3) - 1) / f->dst_w)) << 16;
+		reg_2874 = 0x00000001;
+	}
+
+	/* Select the horizontal filter */
+	if (f->src_w == f->dst_w) {
+		/* An exact size match uses filter 0 */
+		h_filter = 0;
+	} else {
+		/* Figure out which filter to use */
+		h_filter = ((f->src_w << 16) / f->dst_w) >> 15;
+		h_filter = (h_filter >> 1) + (h_filter & 1);
+		/* Only an exact size match can use filter 0 */
+		h_filter += !h_filter;
+	}
+
+	write_reg(reg_2834, 0x02834);
+	write_reg(reg_2838, 0x02838);
+	IVTV_DEBUG_YUV("Update reg 0x2834 %08x->%08x 0x2838 %08x->%08x\n",
+		       yi->reg_2834, reg_2834, yi->reg_2838, reg_2838);
+
+	write_reg(reg_283c, 0x0283c);
+	write_reg(reg_2844, 0x02844);
+
+	IVTV_DEBUG_YUV("Update reg 0x283c %08x->%08x 0x2844 %08x->%08x\n",
+		       yi->reg_283c, reg_283c, yi->reg_2844, reg_2844);
+
+	write_reg(0x00080514, 0x02840);
+	write_reg(0x00100514, 0x02848);
+	IVTV_DEBUG_YUV("Update reg 0x2840 %08x->%08x 0x2848 %08x->%08x\n",
+		       yi->reg_2840, 0x00080514, yi->reg_2848, 0x00100514);
+
+	write_reg(reg_2854, 0x02854);
+	IVTV_DEBUG_YUV("Update reg 0x2854 %08x->%08x \n",
+		       yi->reg_2854, reg_2854);
+
+	write_reg(reg_285c, 0x0285c);
+	write_reg(reg_2864, 0x02864);
+	IVTV_DEBUG_YUV("Update reg 0x285c %08x->%08x 0x2864 %08x->%08x\n",
+		       yi->reg_285c, reg_285c, yi->reg_2864, reg_2864);
+
+	write_reg(reg_2874, 0x02874);
+	IVTV_DEBUG_YUV("Update reg 0x2874 %08x->%08x\n",
+		       yi->reg_2874, reg_2874);
+
+	write_reg(reg_2870, 0x02870);
+	IVTV_DEBUG_YUV("Update reg 0x2870 %08x->%08x\n",
+		       yi->reg_2870, reg_2870);
+
+	write_reg(reg_2890, 0x02890);
+	IVTV_DEBUG_YUV("Update reg 0x2890 %08x->%08x\n",
+		       yi->reg_2890, reg_2890);
+
+	/* Only update the filter if we really need to */
+	if (h_filter != yi->h_filter) {
+		ivtv_yuv_filter(itv, h_filter, -1, -1);
+		yi->h_filter = h_filter;
+	}
+}
+
+static void ivtv_yuv_handle_vertical(struct ivtv *itv, struct yuv_frame_info *f)
+{
+	struct yuv_playback_info *yi = &itv->yuv_info;
+	u32 master_height;
+	u32 reg_2918, reg_291c, reg_2920, reg_2928;
+	u32 reg_2930, reg_2934, reg_293c;
+	u32 reg_2940, reg_2944, reg_294c;
+	u32 reg_2950, reg_2954, reg_2958, reg_295c;
+	u32 reg_2960, reg_2964, reg_2968, reg_296c;
+	u32 reg_289c;
+	u32 src_major_y, src_minor_y;
+	u32 src_major_uv, src_minor_uv;
+	u32 reg_2964_base, reg_2968_base;
+	int v_filter_1, v_filter_2;
+
+	IVTV_DEBUG_WARN
+	    ("Adjust to height %d src_h %d dst_h %d src_y %d dst_y %d\n",
+	     f->tru_h, f->src_h, f->dst_h, f->src_y, f->dst_y);
+
+	/* What scaling mode is being used... */
+	IVTV_DEBUG_YUV("Scaling mode Y: %s\n",
+		       f->interlaced_y ? "Interlaced" : "Progressive");
+
+	IVTV_DEBUG_YUV("Scaling mode UV: %s\n",
+		       f->interlaced_uv ? "Interlaced" : "Progressive");
+
+	/* What is the source video being treated as... */
+	IVTV_DEBUG_WARN("Source video: %s\n",
+			f->interlaced ? "Interlaced" : "Progressive");
+
+	/* We offset into the image using two different index methods, so split
+	   the y source coord into two parts. */
+	if (f->src_y < 8) {
+		src_minor_uv = f->src_y;
+		src_major_uv = 0;
+	} else {
+		src_minor_uv = 8;
+		src_major_uv = f->src_y - 8;
+	}
+
+	src_minor_y = src_minor_uv;
+	src_major_y = src_major_uv;
+
+	if (f->offset_y)
+		src_minor_y += 16;
+
+	if (f->interlaced_y)
+		reg_2918 = (f->dst_h << 16) | (f->src_h + src_minor_y);
+	else
+		reg_2918 = (f->dst_h << 16) | ((f->src_h + src_minor_y) << 1);
+
+	if (f->interlaced_uv)
+		reg_291c = (f->dst_h << 16) | ((f->src_h + src_minor_uv) >> 1);
+	else
+		reg_291c = (f->dst_h << 16) | (f->src_h + src_minor_uv);
+
+	reg_2964_base = (src_minor_y * ((f->dst_h << 16) / f->src_h)) >> 14;
+	reg_2968_base = (src_minor_uv * ((f->dst_h << 16) / f->src_h)) >> 14;
+
+	if (f->dst_h / 2 >= f->src_h && !f->interlaced_y) {
+		master_height = (f->src_h * 0x00400000) / f->dst_h;
+		if ((f->src_h * 0x00400000) - (master_height * f->dst_h) >= f->dst_h / 2)
+			master_height++;
+		reg_2920 = master_height >> 2;
+		reg_2928 = master_height >> 3;
+		reg_2930 = master_height;
+		reg_2940 = master_height >> 1;
+		reg_2964_base >>= 3;
+		reg_2968_base >>= 3;
+		reg_296c = 0x00000000;
+	} else if (f->dst_h >= f->src_h) {
+		master_height = (f->src_h * 0x00400000) / f->dst_h;
+		master_height = (master_height >> 1) + (master_height & 1);
+		reg_2920 = master_height >> 2;
+		reg_2928 = master_height >> 2;
+		reg_2930 = master_height;
+		reg_2940 = master_height >> 1;
+		reg_296c = 0x00000000;
+		if (f->interlaced_y) {
+			reg_2964_base >>= 3;
+		} else {
+			reg_296c++;
+			reg_2964_base >>= 2;
+		}
+		if (f->interlaced_uv)
+			reg_2928 >>= 1;
+		reg_2968_base >>= 3;
+	} else if (f->dst_h >= f->src_h / 2) {
+		master_height = (f->src_h * 0x00200000) / f->dst_h;
+		master_height = (master_height >> 1) + (master_height & 1);
+		reg_2920 = master_height >> 2;
+		reg_2928 = master_height >> 2;
+		reg_2930 = master_height;
+		reg_2940 = master_height;
+		reg_296c = 0x00000101;
+		if (f->interlaced_y) {
+			reg_2964_base >>= 2;
+		} else {
+			reg_296c++;
+			reg_2964_base >>= 1;
+		}
+		if (f->interlaced_uv)
+			reg_2928 >>= 1;
+		reg_2968_base >>= 2;
+	} else {
+		master_height = (f->src_h * 0x00100000) / f->dst_h;
+		master_height = (master_height >> 1) + (master_height & 1);
+		reg_2920 = master_height >> 2;
+		reg_2928 = master_height >> 2;
+		reg_2930 = master_height;
+		reg_2940 = master_height;
+		reg_2964_base >>= 1;
+		reg_2968_base >>= 2;
+		reg_296c = 0x00000102;
+	}
+
+	/* FIXME These registers change depending on scaled / unscaled output
+	   We really need to work out what they should be */
+	if (f->src_h == f->dst_h) {
+		reg_2934 = 0x00020000;
+		reg_293c = 0x00100000;
+		reg_2944 = 0x00040000;
+		reg_294c = 0x000b0000;
+	} else {
+		reg_2934 = 0x00000FF0;
+		reg_293c = 0x00000FF0;
+		reg_2944 = 0x00000FF0;
+		reg_294c = 0x00000FF0;
+	}
+
+	/* The first line to be displayed */
+	reg_2950 = 0x00010000 + src_major_y;
+	if (f->interlaced_y)
+		reg_2950 += 0x00010000;
+	reg_2954 = reg_2950 + 1;
+
+	reg_2958 = 0x00010000 + (src_major_y >> 1);
+	if (f->interlaced_uv)
+		reg_2958 += 0x00010000;
+	reg_295c = reg_2958 + 1;
+
+	if (yi->decode_height == 480)
+		reg_289c = 0x011e0017;
+	else
+		reg_289c = 0x01500017;
+
+	if (f->dst_y < 0)
+		reg_289c = (reg_289c - ((f->dst_y & ~1)<<15))-(f->dst_y >>1);
+	else
+		reg_289c = (reg_289c + ((f->dst_y & ~1)<<15))+(f->dst_y >>1);
+
+	/* How much of the source to decode.
+	   Take into account the source offset */
+	reg_2960 = ((src_minor_y + f->src_h + src_major_y) - 1) |
+		(((src_minor_uv + f->src_h + src_major_uv - 1) & ~1) << 15);
+
+	/* Calculate correct value for register 2964 */
+	if (f->src_h == f->dst_h) {
+		reg_2964 = 1;
+	} else {
+		reg_2964 = 2 + ((f->dst_h << 1) / f->src_h);
+		reg_2964 = (reg_2964 >> 1) + (reg_2964 & 1);
+	}
+	reg_2968 = (reg_2964 << 16) + reg_2964 + (reg_2964 >> 1);
+	reg_2964 = (reg_2964 << 16) + reg_2964 + (reg_2964 * 46 / 94);
+
+	/* Okay, we've wasted time working out the correct value,
+	   but if we use it, it fouls the window alignment.
+	   Fudge it to what we want... */
+	reg_2964 = 0x00010001 + ((reg_2964 & 0x0000FFFF) - (reg_2964 >> 16));
+	reg_2968 = 0x00010001 + ((reg_2968 & 0x0000FFFF) - (reg_2968 >> 16));
+
+	/* Deviate further from what it should be. I find the flicker headache
+	   inducing so try to reduce it slightly. Leave 2968 as-is otherwise
+	   colours foul. */
+	if ((reg_2964 != 0x00010001) && (f->dst_h / 2 <= f->src_h))
+		reg_2964 = (reg_2964 & 0xFFFF0000) + ((reg_2964 & 0x0000FFFF) / 2);
+
+	if (!f->interlaced_y)
+		reg_2964 -= 0x00010001;
+	if (!f->interlaced_uv)
+		reg_2968 -= 0x00010001;
+
+	reg_2964 += ((reg_2964_base << 16) | reg_2964_base);
+	reg_2968 += ((reg_2968_base << 16) | reg_2968_base);
+
+	/* Select the vertical filter */
+	if (f->src_h == f->dst_h) {
+		/* An exact size match uses filter 0/1 */
+		v_filter_1 = 0;
+		v_filter_2 = 1;
+	} else {
+		/* Figure out which filter to use */
+		v_filter_1 = ((f->src_h << 16) / f->dst_h) >> 15;
+		v_filter_1 = (v_filter_1 >> 1) + (v_filter_1 & 1);
+		/* Only an exact size match can use filter 0 */
+		v_filter_1 += !v_filter_1;
+		v_filter_2 = v_filter_1;
+	}
+
+	write_reg(reg_2934, 0x02934);
+	write_reg(reg_293c, 0x0293c);
+	IVTV_DEBUG_YUV("Update reg 0x2934 %08x->%08x 0x293c %08x->%08x\n",
+		       yi->reg_2934, reg_2934, yi->reg_293c, reg_293c);
+	write_reg(reg_2944, 0x02944);
+	write_reg(reg_294c, 0x0294c);
+	IVTV_DEBUG_YUV("Update reg 0x2944 %08x->%08x 0x294c %08x->%08x\n",
+		       yi->reg_2944, reg_2944, yi->reg_294c, reg_294c);
+
+	/* Ensure 2970 is 0 (does it ever change ?) */
+/*	write_reg(0,0x02970); */
+/*	IVTV_DEBUG_YUV("Update reg 0x2970 %08x->%08x\n", yi->reg_2970, 0); */
+
+	write_reg(reg_2930, 0x02938);
+	write_reg(reg_2930, 0x02930);
+	IVTV_DEBUG_YUV("Update reg 0x2930 %08x->%08x 0x2938 %08x->%08x\n",
+		       yi->reg_2930, reg_2930, yi->reg_2938, reg_2930);
+
+	write_reg(reg_2928, 0x02928);
+	write_reg(reg_2928 + 0x514, 0x0292C);
+	IVTV_DEBUG_YUV("Update reg 0x2928 %08x->%08x 0x292c %08x->%08x\n",
+		       yi->reg_2928, reg_2928, yi->reg_292c, reg_2928 + 0x514);
+
+	write_reg(reg_2920, 0x02920);
+	write_reg(reg_2920 + 0x514, 0x02924);
+	IVTV_DEBUG_YUV("Update reg 0x2920 %08x->%08x 0x2924 %08x->%08x\n",
+		       yi->reg_2920, reg_2920, yi->reg_2924, reg_2920 + 0x514);
+
+	write_reg(reg_2918, 0x02918);
+	write_reg(reg_291c, 0x0291C);
+	IVTV_DEBUG_YUV("Update reg 0x2918 %08x->%08x 0x291C %08x->%08x\n",
+		       yi->reg_2918, reg_2918, yi->reg_291c, reg_291c);
+
+	write_reg(reg_296c, 0x0296c);
+	IVTV_DEBUG_YUV("Update reg 0x296c %08x->%08x\n",
+		       yi->reg_296c, reg_296c);
+
+	write_reg(reg_2940, 0x02948);
+	write_reg(reg_2940, 0x02940);
+	IVTV_DEBUG_YUV("Update reg 0x2940 %08x->%08x 0x2948 %08x->%08x\n",
+		       yi->reg_2940, reg_2940, yi->reg_2948, reg_2940);
+
+	write_reg(reg_2950, 0x02950);
+	write_reg(reg_2954, 0x02954);
+	IVTV_DEBUG_YUV("Update reg 0x2950 %08x->%08x 0x2954 %08x->%08x\n",
+		       yi->reg_2950, reg_2950, yi->reg_2954, reg_2954);
+
+	write_reg(reg_2958, 0x02958);
+	write_reg(reg_295c, 0x0295C);
+	IVTV_DEBUG_YUV("Update reg 0x2958 %08x->%08x 0x295C %08x->%08x\n",
+		       yi->reg_2958, reg_2958, yi->reg_295c, reg_295c);
+
+	write_reg(reg_2960, 0x02960);
+	IVTV_DEBUG_YUV("Update reg 0x2960 %08x->%08x \n",
+		       yi->reg_2960, reg_2960);
+
+	write_reg(reg_2964, 0x02964);
+	write_reg(reg_2968, 0x02968);
+	IVTV_DEBUG_YUV("Update reg 0x2964 %08x->%08x 0x2968 %08x->%08x\n",
+		       yi->reg_2964, reg_2964, yi->reg_2968, reg_2968);
+
+	write_reg(reg_289c, 0x0289c);
+	IVTV_DEBUG_YUV("Update reg 0x289c %08x->%08x\n",
+		       yi->reg_289c, reg_289c);
+
+	/* Only update filter 1 if we really need to */
+	if (v_filter_1 != yi->v_filter_1) {
+		ivtv_yuv_filter(itv, -1, v_filter_1, -1);
+		yi->v_filter_1 = v_filter_1;
+	}
+
+	/* Only update filter 2 if we really need to */
+	if (v_filter_2 != yi->v_filter_2) {
+		ivtv_yuv_filter(itv, -1, -1, v_filter_2);
+		yi->v_filter_2 = v_filter_2;
+	}
+}
+
+/* Modify the supplied coordinate information to fit the visible osd area */
+static u32 ivtv_yuv_window_setup(struct ivtv *itv, struct yuv_frame_info *f)
+{
+	struct yuv_frame_info *of = &itv->yuv_info.old_frame_info;
+	int osd_crop;
+	u32 osd_scale;
+	u32 yuv_update = 0;
+
+	/* Sorry, but no negative coords for src */
+	if (f->src_x < 0)
+		f->src_x = 0;
+	if (f->src_y < 0)
+		f->src_y = 0;
+
+	/* Can only reduce width down to 1/4 original size */
+	if ((osd_crop = f->src_w - 4 * f->dst_w) > 0) {
+		f->src_x += osd_crop / 2;
+		f->src_w = (f->src_w - osd_crop) & ~3;
+		f->dst_w = f->src_w / 4;
+		f->dst_w += f->dst_w & 1;
+	}
+
+	/* Can only reduce height down to 1/4 original size */
+	if (f->src_h / f->dst_h >= 2) {
+		/* Overflow may be because we're running progressive,
+		   so force mode switch */
+		f->interlaced_y = 1;
+		/* Make sure we're still within limits for interlace */
+		if ((osd_crop = f->src_h - 4 * f->dst_h) > 0) {
+			/* If we reach here we'll have to force the height. */
+			f->src_y += osd_crop / 2;
+			f->src_h = (f->src_h - osd_crop) & ~3;
+			f->dst_h = f->src_h / 4;
+			f->dst_h += f->dst_h & 1;
+		}
+	}
+
+	/* If there's nothing to safe to display, we may as well stop now */
+	if ((int)f->dst_w <= 2 || (int)f->dst_h <= 2 ||
+	    (int)f->src_w <= 2 || (int)f->src_h <= 2) {
+		return IVTV_YUV_UPDATE_INVALID;
+	}
+
+	/* Ensure video remains inside OSD area */
+	osd_scale = (f->src_h << 16) / f->dst_h;
+
+	if ((osd_crop = f->pan_y - f->dst_y) > 0) {
+		/* Falls off the upper edge - crop */
+		f->src_y += (osd_scale * osd_crop) >> 16;
+		f->src_h -= (osd_scale * osd_crop) >> 16;
+		f->dst_h -= osd_crop;
+		f->dst_y = 0;
+	} else {
+		f->dst_y -= f->pan_y;
+	}
+
+	if ((osd_crop = f->dst_h + f->dst_y - f->vis_h) > 0) {
+		/* Falls off the lower edge - crop */
+		f->dst_h -= osd_crop;
+		f->src_h -= (osd_scale * osd_crop) >> 16;
+	}
+
+	osd_scale = (f->src_w << 16) / f->dst_w;
+
+	if ((osd_crop = f->pan_x - f->dst_x) > 0) {
+		/* Fall off the left edge - crop */
+		f->src_x += (osd_scale * osd_crop) >> 16;
+		f->src_w -= (osd_scale * osd_crop) >> 16;
+		f->dst_w -= osd_crop;
+		f->dst_x = 0;
+	} else {
+		f->dst_x -= f->pan_x;
+	}
+
+	if ((osd_crop = f->dst_w + f->dst_x - f->vis_w) > 0) {
+		/* Falls off the right edge - crop */
+		f->dst_w -= osd_crop;
+		f->src_w -= (osd_scale * osd_crop) >> 16;
+	}
+
+	if (itv->yuv_info.track_osd) {
+		/* The OSD can be moved. Track to it */
+		f->dst_x += itv->yuv_info.osd_x_offset;
+		f->dst_y += itv->yuv_info.osd_y_offset;
+	}
+
+	/* Width & height for both src & dst must be even.
+	   Same for coordinates. */
+	f->dst_w &= ~1;
+	f->dst_x &= ~1;
+
+	f->src_w += f->src_x & 1;
+	f->src_x &= ~1;
+
+	f->src_w &= ~1;
+	f->dst_w &= ~1;
+
+	f->dst_h &= ~1;
+	f->dst_y &= ~1;
+
+	f->src_h += f->src_y & 1;
+	f->src_y &= ~1;
+
+	f->src_h &= ~1;
+	f->dst_h &= ~1;
+
+	/* Due to rounding, we may have reduced the output size to <1/4 of
+	   the source. Check again, but this time just resize. Don't change
+	   source coordinates */
+	if (f->dst_w < f->src_w / 4) {
+		f->src_w &= ~3;
+		f->dst_w = f->src_w / 4;
+		f->dst_w += f->dst_w & 1;
+	}
+	if (f->dst_h < f->src_h / 4) {
+		f->src_h &= ~3;
+		f->dst_h = f->src_h / 4;
+		f->dst_h += f->dst_h & 1;
+	}
+
+	/* Check again. If there's nothing to safe to display, stop now */
+	if ((int)f->dst_w <= 2 || (int)f->dst_h <= 2 ||
+	    (int)f->src_w <= 2 || (int)f->src_h <= 2) {
+		return IVTV_YUV_UPDATE_INVALID;
+	}
+
+	/* Both x offset & width are linked, so they have to be done together */
+	if ((of->dst_w != f->dst_w) || (of->src_w != f->src_w) ||
+	    (of->dst_x != f->dst_x) || (of->src_x != f->src_x) ||
+	    (of->pan_x != f->pan_x) || (of->vis_w != f->vis_w)) {
+		yuv_update |= IVTV_YUV_UPDATE_HORIZONTAL;
+	}
+
+	if ((of->src_h != f->src_h) || (of->dst_h != f->dst_h) ||
+	    (of->dst_y != f->dst_y) || (of->src_y != f->src_y) ||
+	    (of->pan_y != f->pan_y) || (of->vis_h != f->vis_h) ||
+	    (of->lace_mode != f->lace_mode) ||
+	    (of->interlaced_y != f->interlaced_y) ||
+	    (of->interlaced_uv != f->interlaced_uv)) {
+		yuv_update |= IVTV_YUV_UPDATE_VERTICAL;
+	}
+
+	return yuv_update;
+}
+
+/* Update the scaling register to the requested value */
+void ivtv_yuv_work_handler(struct ivtv *itv)
+{
+	struct yuv_playback_info *yi = &itv->yuv_info;
+	struct yuv_frame_info f;
+	int frame = yi->update_frame;
+	u32 yuv_update;
+
+	IVTV_DEBUG_YUV("Update yuv registers for frame %d\n", frame);
+	f = yi->new_frame_info[frame];
+
+	if (yi->track_osd) {
+		/* Snapshot the osd pan info */
+		f.pan_x = yi->osd_x_pan;
+		f.pan_y = yi->osd_y_pan;
+		f.vis_w = yi->osd_vis_w;
+		f.vis_h = yi->osd_vis_h;
+	} else {
+		/* Not tracking the osd, so assume full screen */
+		f.pan_x = 0;
+		f.pan_y = 0;
+		f.vis_w = 720;
+		f.vis_h = yi->decode_height;
+	}
+
+	/* Calculate the display window coordinates. Exit if nothing left */
+	if (!(yuv_update = ivtv_yuv_window_setup(itv, &f)))
+		return;
+
+	if (yuv_update & IVTV_YUV_UPDATE_INVALID) {
+		write_reg(0x01008080, 0x2898);
+	} else if (yuv_update) {
+		write_reg(0x00108080, 0x2898);
+
+		if (yuv_update & IVTV_YUV_UPDATE_HORIZONTAL)
+			ivtv_yuv_handle_horizontal(itv, &f);
+
+		if (yuv_update & IVTV_YUV_UPDATE_VERTICAL)
+			ivtv_yuv_handle_vertical(itv, &f);
+	}
+	yi->old_frame_info = f;
+}
+
+static void ivtv_yuv_init(struct ivtv *itv)
+{
+	struct yuv_playback_info *yi = &itv->yuv_info;
+
+	IVTV_DEBUG_YUV("ivtv_yuv_init\n");
+
+	/* Take a snapshot of the current register settings */
+	yi->reg_2834 = read_reg(0x02834);
+	yi->reg_2838 = read_reg(0x02838);
+	yi->reg_283c = read_reg(0x0283c);
+	yi->reg_2840 = read_reg(0x02840);
+	yi->reg_2844 = read_reg(0x02844);
+	yi->reg_2848 = read_reg(0x02848);
+	yi->reg_2854 = read_reg(0x02854);
+	yi->reg_285c = read_reg(0x0285c);
+	yi->reg_2864 = read_reg(0x02864);
+	yi->reg_2870 = read_reg(0x02870);
+	yi->reg_2874 = read_reg(0x02874);
+	yi->reg_2898 = read_reg(0x02898);
+	yi->reg_2890 = read_reg(0x02890);
+
+	yi->reg_289c = read_reg(0x0289c);
+	yi->reg_2918 = read_reg(0x02918);
+	yi->reg_291c = read_reg(0x0291c);
+	yi->reg_2920 = read_reg(0x02920);
+	yi->reg_2924 = read_reg(0x02924);
+	yi->reg_2928 = read_reg(0x02928);
+	yi->reg_292c = read_reg(0x0292c);
+	yi->reg_2930 = read_reg(0x02930);
+	yi->reg_2934 = read_reg(0x02934);
+	yi->reg_2938 = read_reg(0x02938);
+	yi->reg_293c = read_reg(0x0293c);
+	yi->reg_2940 = read_reg(0x02940);
+	yi->reg_2944 = read_reg(0x02944);
+	yi->reg_2948 = read_reg(0x02948);
+	yi->reg_294c = read_reg(0x0294c);
+	yi->reg_2950 = read_reg(0x02950);
+	yi->reg_2954 = read_reg(0x02954);
+	yi->reg_2958 = read_reg(0x02958);
+	yi->reg_295c = read_reg(0x0295c);
+	yi->reg_2960 = read_reg(0x02960);
+	yi->reg_2964 = read_reg(0x02964);
+	yi->reg_2968 = read_reg(0x02968);
+	yi->reg_296c = read_reg(0x0296c);
+	yi->reg_2970 = read_reg(0x02970);
+
+	yi->v_filter_1 = -1;
+	yi->v_filter_2 = -1;
+	yi->h_filter = -1;
+
+	/* Set some valid size info */
+	yi->osd_x_offset = read_reg(0x02a04) & 0x00000FFF;
+	yi->osd_y_offset = (read_reg(0x02a04) >> 16) & 0x00000FFF;
+
+	/* Bit 2 of reg 2878 indicates current decoder output format
+	   0 : NTSC    1 : PAL */
+	if (read_reg(0x2878) & 4)
+		yi->decode_height = 576;
+	else
+		yi->decode_height = 480;
+
+	if (!itv->osd_info) {
+		yi->osd_vis_w = 720 - yi->osd_x_offset;
+		yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
+	} else {
+		/* If no visible size set, assume full size */
+		if (!yi->osd_vis_w)
+			yi->osd_vis_w = 720 - yi->osd_x_offset;
+
+		if (!yi->osd_vis_h) {
+			yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
+		} else if (yi->osd_vis_h + yi->osd_y_offset > yi->decode_height) {
+			/* If output video standard has changed, requested height may
+			   not be legal */
+			IVTV_DEBUG_WARN("Clipping yuv output - fb size (%d) exceeds video standard limit (%d)\n",
+					yi->osd_vis_h + yi->osd_y_offset,
+					yi->decode_height);
+			yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
+		}
+	}
+
+	/* We need a buffer for blanking when Y plane is offset - non-fatal if we can't get one */
+	yi->blanking_ptr = kzalloc(720 * 16, GFP_ATOMIC|__GFP_NOWARN);
+	if (yi->blanking_ptr) {
+		yi->blanking_dmaptr = dma_map_single(&itv->pdev->dev,
+						     yi->blanking_ptr,
+						     720 * 16, DMA_TO_DEVICE);
+	} else {
+		yi->blanking_dmaptr = 0;
+		IVTV_DEBUG_WARN("Failed to allocate yuv blanking buffer\n");
+	}
+
+	/* Enable YUV decoder output */
+	write_reg_sync(0x01, IVTV_REG_VDM);
+
+	set_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags);
+	atomic_set(&yi->next_dma_frame, 0);
+}
+
+/* Get next available yuv buffer on PVR350 */
+static void ivtv_yuv_next_free(struct ivtv *itv)
+{
+	int draw, display;
+	struct yuv_playback_info *yi = &itv->yuv_info;
+
+	if (atomic_read(&yi->next_dma_frame) == -1)
+		ivtv_yuv_init(itv);
+
+	draw = atomic_read(&yi->next_fill_frame);
+	display = atomic_read(&yi->next_dma_frame);
+
+	if (display > draw)
+		display -= IVTV_YUV_BUFFERS;
+
+	if (draw - display >= yi->max_frames_buffered)
+		draw = (u8)(draw - 1) % IVTV_YUV_BUFFERS;
+	else
+		yi->new_frame_info[draw].update = 0;
+
+	yi->draw_frame = draw;
+}
+
+/* Set up frame according to ivtv_dma_frame parameters */
+static void ivtv_yuv_setup_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
+{
+	struct yuv_playback_info *yi = &itv->yuv_info;
+	u8 frame = yi->draw_frame;
+	u8 last_frame = (u8)(frame - 1) % IVTV_YUV_BUFFERS;
+	struct yuv_frame_info *nf = &yi->new_frame_info[frame];
+	struct yuv_frame_info *of = &yi->new_frame_info[last_frame];
+	int lace_threshold = yi->lace_threshold;
+
+	/* Preserve old update flag in case we're overwriting a queued frame */
+	int update = nf->update;
+
+	/* Take a snapshot of the yuv coordinate information */
+	nf->src_x = args->src.left;
+	nf->src_y = args->src.top;
+	nf->src_w = args->src.width;
+	nf->src_h = args->src.height;
+	nf->dst_x = args->dst.left;
+	nf->dst_y = args->dst.top;
+	nf->dst_w = args->dst.width;
+	nf->dst_h = args->dst.height;
+	nf->tru_x = args->dst.left;
+	nf->tru_w = args->src_width;
+	nf->tru_h = args->src_height;
+
+	/* Are we going to offset the Y plane */
+	nf->offset_y = (nf->tru_h + nf->src_x < 512 - 16) ? 1 : 0;
+
+	nf->update = 0;
+	nf->interlaced_y = 0;
+	nf->interlaced_uv = 0;
+	nf->delay = 0;
+	nf->sync_field = 0;
+	nf->lace_mode = yi->lace_mode & IVTV_YUV_MODE_MASK;
+
+	if (lace_threshold < 0)
+		lace_threshold = yi->decode_height - 1;
+
+	/* Work out the lace settings */
+	switch (nf->lace_mode) {
+	case IVTV_YUV_MODE_PROGRESSIVE: /* Progressive mode */
+		nf->interlaced = 0;
+		if (nf->tru_h < 512 || (nf->tru_h > 576 && nf->tru_h < 1021))
+			nf->interlaced_y = 0;
+		else
+			nf->interlaced_y = 1;
+
+		if (nf->tru_h < 1021 && (nf->dst_h >= nf->src_h / 2))
+			nf->interlaced_uv = 0;
+		else
+			nf->interlaced_uv = 1;
+		break;
+
+	case IVTV_YUV_MODE_AUTO:
+		if (nf->tru_h <= lace_threshold || nf->tru_h > 576 || nf->tru_w > 720) {
+			nf->interlaced = 0;
+			if ((nf->tru_h < 512) ||
+			    (nf->tru_h > 576 && nf->tru_h < 1021) ||
+			    (nf->tru_w > 720 && nf->tru_h < 1021))
+				nf->interlaced_y = 0;
+			else
+				nf->interlaced_y = 1;
+			if (nf->tru_h < 1021 && (nf->dst_h >= nf->src_h / 2))
+				nf->interlaced_uv = 0;
+			else
+				nf->interlaced_uv = 1;
+		} else {
+			nf->interlaced = 1;
+			nf->interlaced_y = 1;
+			nf->interlaced_uv = 1;
+		}
+		break;
+
+	case IVTV_YUV_MODE_INTERLACED: /* Interlace mode */
+	default:
+		nf->interlaced = 1;
+		nf->interlaced_y = 1;
+		nf->interlaced_uv = 1;
+		break;
+	}
+
+	if (memcmp(&yi->old_frame_info_args, nf, sizeof(*nf))) {
+		yi->old_frame_info_args = *nf;
+		nf->update = 1;
+		IVTV_DEBUG_YUV("Requesting reg update for frame %d\n", frame);
+	}
+
+	nf->update |= update;
+	nf->sync_field = yi->lace_sync_field;
+	nf->delay = nf->sync_field != of->sync_field;
+}
+
+/* Frame is complete & ready for display */
+void ivtv_yuv_frame_complete(struct ivtv *itv)
+{
+	atomic_set(&itv->yuv_info.next_fill_frame,
+			(itv->yuv_info.draw_frame + 1) % IVTV_YUV_BUFFERS);
+}
+
+static int ivtv_yuv_udma_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
+{
+	DEFINE_WAIT(wait);
+	int rc = 0;
+	int got_sig = 0;
+	/* DMA the frame */
+	mutex_lock(&itv->udma.lock);
+
+	if ((rc = ivtv_yuv_prep_user_dma(itv, &itv->udma, args)) != 0) {
+		mutex_unlock(&itv->udma.lock);
+		return rc;
+	}
+
+	ivtv_udma_prepare(itv);
+	prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE);
+	/* if no UDMA is pending and no UDMA is in progress, then the DMA
+	   is finished */
+	while (test_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags) ||
+	       test_bit(IVTV_F_I_UDMA, &itv->i_flags)) {
+		/* don't interrupt if the DMA is in progress but break off
+		   a still pending DMA. */
+		got_sig = signal_pending(current);
+		if (got_sig && test_and_clear_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags))
+			break;
+		got_sig = 0;
+		schedule();
+	}
+	finish_wait(&itv->dma_waitq, &wait);
+
+	/* Unmap Last DMA Xfer */
+	ivtv_udma_unmap(itv);
+
+	if (got_sig) {
+		IVTV_DEBUG_INFO("User stopped YUV UDMA\n");
+		mutex_unlock(&itv->udma.lock);
+		return -EINTR;
+	}
+
+	ivtv_yuv_frame_complete(itv);
+
+	mutex_unlock(&itv->udma.lock);
+	return rc;
+}
+
+/* Setup frame according to V4L2 parameters */
+void ivtv_yuv_setup_stream_frame(struct ivtv *itv)
+{
+	struct yuv_playback_info *yi = &itv->yuv_info;
+	struct ivtv_dma_frame dma_args;
+
+	ivtv_yuv_next_free(itv);
+
+	/* Copy V4L2 parameters to an ivtv_dma_frame struct... */
+	dma_args.y_source = NULL;
+	dma_args.uv_source = NULL;
+	dma_args.src.left = 0;
+	dma_args.src.top = 0;
+	dma_args.src.width = yi->v4l2_src_w;
+	dma_args.src.height = yi->v4l2_src_h;
+	dma_args.dst = yi->main_rect;
+	dma_args.src_width = yi->v4l2_src_w;
+	dma_args.src_height = yi->v4l2_src_h;
+
+	/* ... and use the same setup routine as ivtv_yuv_prep_frame */
+	ivtv_yuv_setup_frame(itv, &dma_args);
+
+	if (!itv->dma_data_req_offset)
+		itv->dma_data_req_offset = yuv_offset[yi->draw_frame];
+}
+
+/* Attempt to dma a frame from a user buffer */
+int ivtv_yuv_udma_stream_frame(struct ivtv *itv, void __user *src)
+{
+	struct yuv_playback_info *yi = &itv->yuv_info;
+	struct ivtv_dma_frame dma_args;
+	int res;
+
+	ivtv_yuv_setup_stream_frame(itv);
+
+	/* We only need to supply source addresses for this */
+	dma_args.y_source = src;
+	dma_args.uv_source = src + 720 * ((yi->v4l2_src_h + 31) & ~31);
+	/* Wait for frame DMA. Note that serialize_lock is locked,
+	   so to allow other processes to access the driver while
+	   we are waiting unlock first and later lock again. */
+	mutex_unlock(&itv->serialize_lock);
+	res = ivtv_yuv_udma_frame(itv, &dma_args);
+	mutex_lock(&itv->serialize_lock);
+	return res;
+}
+
+/* IVTV_IOC_DMA_FRAME ioctl handler */
+int ivtv_yuv_prep_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
+{
+	int res;
+
+/*	IVTV_DEBUG_INFO("yuv_prep_frame\n"); */
+	ivtv_yuv_next_free(itv);
+	ivtv_yuv_setup_frame(itv, args);
+	/* Wait for frame DMA. Note that serialize_lock is locked,
+	   so to allow other processes to access the driver while
+	   we are waiting unlock first and later lock again. */
+	mutex_unlock(&itv->serialize_lock);
+	res = ivtv_yuv_udma_frame(itv, args);
+	mutex_lock(&itv->serialize_lock);
+	return res;
+}
+
+void ivtv_yuv_close(struct ivtv *itv)
+{
+	struct yuv_playback_info *yi = &itv->yuv_info;
+	int h_filter, v_filter_1, v_filter_2;
+
+	IVTV_DEBUG_YUV("ivtv_yuv_close\n");
+	mutex_unlock(&itv->serialize_lock);
+	ivtv_waitq(&itv->vsync_waitq);
+	mutex_lock(&itv->serialize_lock);
+
+	yi->running = 0;
+	atomic_set(&yi->next_dma_frame, -1);
+	atomic_set(&yi->next_fill_frame, 0);
+
+	/* Reset registers we have changed so mpeg playback works */
+
+	/* If we fully restore this register, the display may remain active.
+	   Restore, but set one bit to blank the video. Firmware will always
+	   clear this bit when needed, so not a problem. */
+	write_reg(yi->reg_2898 | 0x01000000, 0x2898);
+
+	write_reg(yi->reg_2834, 0x02834);
+	write_reg(yi->reg_2838, 0x02838);
+	write_reg(yi->reg_283c, 0x0283c);
+	write_reg(yi->reg_2840, 0x02840);
+	write_reg(yi->reg_2844, 0x02844);
+	write_reg(yi->reg_2848, 0x02848);
+	write_reg(yi->reg_2854, 0x02854);
+	write_reg(yi->reg_285c, 0x0285c);
+	write_reg(yi->reg_2864, 0x02864);
+	write_reg(yi->reg_2870, 0x02870);
+	write_reg(yi->reg_2874, 0x02874);
+	write_reg(yi->reg_2890, 0x02890);
+	write_reg(yi->reg_289c, 0x0289c);
+
+	write_reg(yi->reg_2918, 0x02918);
+	write_reg(yi->reg_291c, 0x0291c);
+	write_reg(yi->reg_2920, 0x02920);
+	write_reg(yi->reg_2924, 0x02924);
+	write_reg(yi->reg_2928, 0x02928);
+	write_reg(yi->reg_292c, 0x0292c);
+	write_reg(yi->reg_2930, 0x02930);
+	write_reg(yi->reg_2934, 0x02934);
+	write_reg(yi->reg_2938, 0x02938);
+	write_reg(yi->reg_293c, 0x0293c);
+	write_reg(yi->reg_2940, 0x02940);
+	write_reg(yi->reg_2944, 0x02944);
+	write_reg(yi->reg_2948, 0x02948);
+	write_reg(yi->reg_294c, 0x0294c);
+	write_reg(yi->reg_2950, 0x02950);
+	write_reg(yi->reg_2954, 0x02954);
+	write_reg(yi->reg_2958, 0x02958);
+	write_reg(yi->reg_295c, 0x0295c);
+	write_reg(yi->reg_2960, 0x02960);
+	write_reg(yi->reg_2964, 0x02964);
+	write_reg(yi->reg_2968, 0x02968);
+	write_reg(yi->reg_296c, 0x0296c);
+	write_reg(yi->reg_2970, 0x02970);
+
+	/* Prepare to restore filters */
+
+	/* First the horizontal filter */
+	if ((yi->reg_2834 & 0x0000FFFF) == (yi->reg_2834 >> 16)) {
+		/* An exact size match uses filter 0 */
+		h_filter = 0;
+	} else {
+		/* Figure out which filter to use */
+		h_filter = ((yi->reg_2834 << 16) / (yi->reg_2834 >> 16)) >> 15;
+		h_filter = (h_filter >> 1) + (h_filter & 1);
+		/* Only an exact size match can use filter 0. */
+		h_filter += !h_filter;
+	}
+
+	/* Now the vertical filter */
+	if ((yi->reg_2918 & 0x0000FFFF) == (yi->reg_2918 >> 16)) {
+		/* An exact size match uses filter 0/1 */
+		v_filter_1 = 0;
+		v_filter_2 = 1;
+	} else {
+		/* Figure out which filter to use */
+		v_filter_1 = ((yi->reg_2918 << 16) / (yi->reg_2918 >> 16)) >> 15;
+		v_filter_1 = (v_filter_1 >> 1) + (v_filter_1 & 1);
+		/* Only an exact size match can use filter 0 */
+		v_filter_1 += !v_filter_1;
+		v_filter_2 = v_filter_1;
+	}
+
+	/* Now restore the filters */
+	ivtv_yuv_filter(itv, h_filter, v_filter_1, v_filter_2);
+
+	/* and clear a few registers */
+	write_reg(0, 0x02814);
+	write_reg(0, 0x0282c);
+	write_reg(0, 0x02904);
+	write_reg(0, 0x02910);
+
+	/* Release the blanking buffer */
+	if (yi->blanking_ptr) {
+		kfree(yi->blanking_ptr);
+		yi->blanking_ptr = NULL;
+		dma_unmap_single(&itv->pdev->dev, yi->blanking_dmaptr,
+				 720 * 16, DMA_TO_DEVICE);
+	}
+
+	/* Invalidate the old dimension information */
+	yi->old_frame_info.src_w = 0;
+	yi->old_frame_info.src_h = 0;
+	yi->old_frame_info_args.src_w = 0;
+	yi->old_frame_info_args.src_h = 0;
+
+	/* All done. */
+	clear_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags);
+}