[media] pwc: Remove dead snapshot code

The in kernel version of the pwc driver has never supported snapshot
mode, and now that we no longer support the pixfmt.priv abuse there also
no longer is a way for userspace to request it, rendering all the code in
question dead (never called), so remove it.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/pwc/pwc-ctrl.c

@@ -220,7 +220,6 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames)
 
 	/* Set various parameters */
 	pdev->vframes = frames;
-	pdev->vsize = size;
 	pdev->valternate = pEntry->alternate;
 	pdev->image = pwc_image_sizes[size];
 	pdev->frame_size = (pdev->image.x * pdev->image.y * 3) / 2;
@@ -240,7 +239,8 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames)
 }
 
 
-static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames, int compression, int snapshot)
+static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames,
+	int compression)
 {
 	unsigned char buf[13];
 	const struct Timon_table_entry *pChoose;
@@ -266,8 +266,6 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames, i
 		return -ENOENT; /* Not supported. */
 
 	memcpy(buf, pChoose->mode, 13);
-	if (snapshot)
-		buf[0] |= 0x80;
 	ret = send_video_command(pdev, pdev->vendpoint, buf, 13);
 	if (ret < 0)
 		return ret;
@@ -283,8 +281,6 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames, i
 
 	/* Set various parameters */
 	pdev->vframes = frames;
-	pdev->vsize = size;
-	pdev->vsnapshot = snapshot;
 	pdev->valternate = pChoose->alternate;
 	pdev->image = pwc_image_sizes[size];
 	pdev->vbandlength = pChoose->bandlength;
@@ -296,12 +292,12 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames, i
 }
 
 
-static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, int compression, int snapshot)
+static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames,
+	int compression)
 {
 	const struct Kiara_table_entry *pChoose = NULL;
 	int fps, ret;
 	unsigned char buf[12];
-	struct Kiara_table_entry RawEntry = {6, 773, 1272, {0xAD, 0xF4, 0x10, 0x27, 0xB6, 0x24, 0x96, 0x02, 0x30, 0x05, 0x03, 0x80}};
 
 	if (size >= PSZ_MAX || frames < 5 || frames > 30 || compression < 0 || compression > 3)
 		return -EINVAL;
@@ -309,29 +305,15 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, i
 		return -EINVAL;
 	fps = (frames / 5) - 1;
 
-	/* special case: VGA @ 5 fps and snapshot is raw bayer mode */
-	if (size == PSZ_VGA && frames == 5 && snapshot && pdev->pixfmt != V4L2_PIX_FMT_YUV420)
-	{
-		/* Only available in case the raw palette is selected or
-		   we have the decompressor available. This mode is
-		   only available in compressed form
-		*/
-		PWC_DEBUG_SIZE("Choosing VGA/5 BAYER mode.\n");
-		pChoose = &RawEntry;
-	}
-	else
-	{
-		/* Find a supported framerate with progressively higher compression ratios
-		   if the preferred ratio is not available.
-		   Skip this step when using RAW modes.
-		*/
-		snapshot = 0;
-		while (compression <= 3) {
-			pChoose = &Kiara_table[size][fps][compression];
-			if (pChoose->alternate != 0)
-				break;
-			compression++;
-		}
+	/* Find a supported framerate with progressively higher compression
+	   ratios if the preferred ratio is not available.
+	   Skip this step when using RAW modes.
+	*/
+	while (compression <= 3) {
+		pChoose = &Kiara_table[size][fps][compression];
+		if (pChoose->alternate != 0)
+			break;
+		compression++;
 	}
 	if (pChoose == NULL || pChoose->alternate == 0)
 		return -ENOENT; /* Not supported. */
@@ -340,8 +322,6 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, i
 
 	/* usb_control_msg won't take staticly allocated arrays as argument?? */
 	memcpy(buf, pChoose->mode, 12);
-	if (snapshot)
-		buf[0] |= 0x80;
 
 	/* Firmware bug: video endpoint is 5, but commands are sent to endpoint 4 */
 	ret = send_video_command(pdev, 4 /* pdev->vendpoint */, buf, 12);
@@ -358,8 +338,6 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, i
 	memcpy(pdev->cmd_buf, buf, 12);
 	/* All set and go */
 	pdev->vframes = frames;
-	pdev->vsize = size;
-	pdev->vsnapshot = snapshot;
 	pdev->valternate = pChoose->alternate;
 	pdev->image = pwc_image_sizes[size];
 	pdev->vbandlength = pChoose->bandlength;
@@ -367,8 +345,8 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, i
 		pdev->frame_size = (pdev->vbandlength * pdev->image.y) / 4;
 	else
 		pdev->frame_size = (pdev->image.x * pdev->image.y * 12) / 8;
-	PWC_TRACE("frame_size=%d, vframes=%d, vsize=%d, vsnapshot=%d, vbandlength=%d\n",
-	    pdev->frame_size,pdev->vframes,pdev->vsize,pdev->vsnapshot,pdev->vbandlength);
+	PWC_TRACE("frame_size=%d, vframes=%d, vsize=%d, vbandlength=%d\n",
+	    pdev->frame_size, pdev->vframes, size, pdev->vbandlength);
 	return 0;
 }
 
@@ -380,9 +358,9 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, i
    @height: viewport height
    @frame: framerate, in fps
    @compression: preferred compression ratio
-   @snapshot: snapshot mode or streaming
  */
-int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, int frames, int compression, int snapshot)
+int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
+	int frames, int compression)
 {
 	int ret, size;
 
@@ -398,10 +376,10 @@ int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, int frame
 		ret = set_video_mode_Nala(pdev, size, frames);
 
 	} else if (DEVICE_USE_CODEC3(pdev->type)) {
-		ret = set_video_mode_Kiara(pdev, size, frames, compression, snapshot);
+		ret = set_video_mode_Kiara(pdev, size, frames, compression);
 
 	} else {
-		ret = set_video_mode_Timon(pdev, size, frames, compression, snapshot);
+		ret = set_video_mode_Timon(pdev, size, frames, compression);
 	}
 	if (ret < 0) {
 		PWC_ERROR("Failed to set video mode %s@%d fps; return code = %d\n", size2name[size], frames, ret);
@@ -852,7 +830,9 @@ long pwc_ioctl(struct pwc_device *pdev, unsigned int cmd, void *arg)
 		if (ARGR(qual) < 0 || ARGR(qual) > 3)
 			ret = -EINVAL;
 		else
-			ret = pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y, pdev->vframes, ARGR(qual), pdev->vsnapshot);
+			ret = pwc_set_video_mode(pdev,
+						 pdev->view.x, pdev->view.y,
+						 pdev->vframes, ARGR(qual));
 leave:
 		mutex_unlock(&pdev->udevlock);
 		break;

drivers/media/video/pwc/pwc-dec23.c

@@ -51,13 +51,6 @@
 # define USE_LOOKUP_TABLE_TO_CLAMP 1
 #endif
 
-/*
- * ENABLE_BAYER_DECODER
- *   0: bayer decoder is not build (save some space)
- *   1: bayer decoder is build and can be used
- */
-#define ENABLE_BAYER_DECODER 0
-
 static void build_subblock_pattern(struct pwc_dec23_private *pdec)
 {
 	static const unsigned int initial_values[12] = {
@@ -469,123 +462,6 @@ static void copy_image_block_CrCb(const int *src, unsigned char *dst, unsigned i
 #endif
 }
 
-#if ENABLE_BAYER_DECODER
-/*
- * Format: 8x2 pixels
- *   . G . G . G . G . G . G . G
- *   . . . . . . . . . . . . . .
- *   . G . G . G . G . G . G . G
- *   . . . . . . . . . . . . . .
- *   or
- *   . . . . . . . . . . . . . .
- *   G . G . G . G . G . G . G .
- *   . . . . . . . . . . . . . .
- *   G . G . G . G . G . G . G .
-*/
-static void copy_image_block_Green(const int *src, unsigned char *dst, unsigned int bytes_per_line, unsigned int scalebits)
-{
-#if UNROLL_LOOP_FOR_COPY
-	/* Unroll all loops */
-	const unsigned char *cm = pwc_crop_table+MAX_OUTER_CROP_VALUE;
-	unsigned char *d = dst;
-	const int *c = src;
-
-	d[0] = cm[c[0] >> scalebits];
-	d[2] = cm[c[1] >> scalebits];
-	d[4] = cm[c[2] >> scalebits];
-	d[6] = cm[c[3] >> scalebits];
-	d[8] = cm[c[4] >> scalebits];
-	d[10] = cm[c[5] >> scalebits];
-	d[12] = cm[c[6] >> scalebits];
-	d[14] = cm[c[7] >> scalebits];
-
-	d = dst + bytes_per_line;
-	d[0] = cm[c[8] >> scalebits];
-	d[2] = cm[c[9] >> scalebits];
-	d[4] = cm[c[10] >> scalebits];
-	d[6] = cm[c[11] >> scalebits];
-	d[8] = cm[c[12] >> scalebits];
-	d[10] = cm[c[13] >> scalebits];
-	d[12] = cm[c[14] >> scalebits];
-	d[14] = cm[c[15] >> scalebits];
-#else
-	int i;
-	unsigned char *d;
-	const int *c = src;
-
-	d = dst;
-	for (i = 0; i < 8; i++, c++)
-		d[i*2] = CLAMP((*c) >> scalebits);
-
-	d = dst + bytes_per_line;
-	for (i = 0; i < 8; i++, c++)
-		d[i*2] = CLAMP((*c) >> scalebits);
-#endif
-}
-#endif
-
-#if ENABLE_BAYER_DECODER
-/*
- * Format: 4x4 pixels
- *   R . R . R . R
- *   . B . B . B .
- *   R . R . R . R
- *   . B . B . B .
- */
-static void copy_image_block_RedBlue(const int *src, unsigned char *dst, unsigned int bytes_per_line, unsigned int scalebits)
-{
-#if UNROLL_LOOP_FOR_COPY
-	/* Unroll all loops */
-	const unsigned char *cm = pwc_crop_table+MAX_OUTER_CROP_VALUE;
-	unsigned char *d = dst;
-	const int *c = src;
-
-	d[0] = cm[c[0] >> scalebits];
-	d[2] = cm[c[1] >> scalebits];
-	d[4] = cm[c[2] >> scalebits];
-	d[6] = cm[c[3] >> scalebits];
-
-	d = dst + bytes_per_line;
-	d[1] = cm[c[4] >> scalebits];
-	d[3] = cm[c[5] >> scalebits];
-	d[5] = cm[c[6] >> scalebits];
-	d[7] = cm[c[7] >> scalebits];
-
-	d = dst + bytes_per_line*2;
-	d[0] = cm[c[8] >> scalebits];
-	d[2] = cm[c[9] >> scalebits];
-	d[4] = cm[c[10] >> scalebits];
-	d[6] = cm[c[11] >> scalebits];
-
-	d = dst + bytes_per_line*3;
-	d[1] = cm[c[12] >> scalebits];
-	d[3] = cm[c[13] >> scalebits];
-	d[5] = cm[c[14] >> scalebits];
-	d[7] = cm[c[15] >> scalebits];
-#else
-	int i;
-	unsigned char *d;
-	const int *c = src;
-
-	d = dst;
-	for (i = 0; i < 4; i++, c++)
-		d[i*2] = CLAMP((*c) >> scalebits);
-
-	d = dst + bytes_per_line;
-	for (i = 0; i < 4; i++, c++)
-		d[i*2+1] = CLAMP((*c) >> scalebits);
-
-	d = dst + bytes_per_line*2;
-	for (i = 0; i < 4; i++, c++)
-		d[i*2] = CLAMP((*c) >> scalebits);
-
-	d = dst + bytes_per_line*3;
-	for (i = 0; i < 4; i++, c++)
-		d[i*2+1] = CLAMP((*c) >> scalebits);
-#endif
-}
-#endif
-
 /*
  * To manage the stream, we keep bits in a 32 bits register.
  * fill_nbits(n): fill the reservoir with at least n bits
@@ -777,71 +653,6 @@ static void DecompressBand23(struct pwc_dec23_private *pdec,
 
 }
 
-#if ENABLE_BAYER_DECODER
-/*
- * Size need to be a multiple of 8 in width
- *
- * Return a block of four line encoded like this:
- *
- *   G R G R G R G R G R G R G R G R
- *   B G B G B G B G B G B G B G B G
- *   G R G R G R G R G R G R G R G R
- *   B G B G B G B G B G B G B G B G
- *
- */
-static void DecompressBandBayer(struct pwc_dec23_private *pdec,
-				const unsigned char *rawyuv,
-				unsigned char *rgbbayer,
-				unsigned int   compressed_image_width,
-				unsigned int   real_image_width)
-{
-	int compression_index, nblocks;
-	const unsigned char *ptable0004;
-	const unsigned char *ptable8004;
-	unsigned char *dest;
-
-	pdec->reservoir = 0;
-	pdec->nbits_in_reservoir = 0;
-	pdec->stream = rawyuv + 1;	/* The first byte of the stream is skipped */
-
-	get_nbits(pdec, 4, compression_index);
-
-	/* pass 1: uncompress RB component */
-	nblocks = compressed_image_width / 4;
-
-	ptable0004 = pdec->table_0004_pass1[compression_index];
-	ptable8004 = pdec->table_8004_pass1[compression_index];
-	dest = rgbbayer;
-
-	/* Each block decode a square of 4x4 */
-	while (nblocks) {
-		decode_block(pdec, ptable0004, ptable8004);
-		copy_image_block_RedBlue(pdec->temp_colors, rgbbayer, real_image_width, pdec->scalebits);
-		dest += 8;
-		nblocks--;
-	}
-
-	/* pass 2: uncompress G component */
-	nblocks = compressed_image_width / 8;
-
-	ptable0004 = pdec->table_0004_pass2[compression_index];
-	ptable8004 = pdec->table_8004_pass2[compression_index];
-
-	/* Each block decode a square of 4x4 */
-	while (nblocks) {
-		decode_block(pdec, ptable0004, ptable8004);
-		copy_image_block_Green(pdec->temp_colors, rgbbayer+1, real_image_width, pdec->scalebits);
-
-		decode_block(pdec, ptable0004, ptable8004);
-		copy_image_block_Green(pdec->temp_colors, rgbbayer+real_image_width, real_image_width, pdec->scalebits);
-
-		rgbbayer += 16;
-		nblocks -= 2;
-	}
-}
-#endif
-
-
 /**
  *
  * Uncompress a pwc23 buffer.
@@ -852,76 +663,44 @@ static void DecompressBandBayer(struct pwc_dec23_private *pdec,
  *
  * src: raw data
  * dst: image output
- * flags: PWCX_FLAG_PLANAR or PWCX_FLAG_BAYER
  */
 void pwc_dec23_decompress(const struct pwc_device *pwc,
 			  const void *src,
-			  void *dst,
-			  int flags)
+			  void *dst)
 {
 	int bandlines_left, stride, bytes_per_block;
 	struct pwc_dec23_private *pdec = pwc->decompress_data;
 
+	/* YUV420P image format */
+	unsigned char *pout_planar_y;
+	unsigned char *pout_planar_u;
+	unsigned char *pout_planar_v;
+	unsigned int   plane_size;
+
 	mutex_lock(&pdec->lock);
 
 	bandlines_left = pwc->image.y / 4;
 	bytes_per_block = pwc->view.x * 4;
-
-	if (flags & PWCX_FLAG_BAYER) {
-#if ENABLE_BAYER_DECODER
-		/* RGB Bayer format */
-		unsigned char *rgbout;
-
-		stride = pwc->view.x * pwc->offset.y;
-		rgbout = dst + stride + pwc->offset.x;
-
-
-		while (bandlines_left--) {
-
-			DecompressBandBayer(pwc->decompress_data,
-					    src,
-					    rgbout,
-					    pwc->image.x, pwc->view.x);
-
-			src += pwc->vbandlength;
-			rgbout += bytes_per_block;
-
-		}
-#else
-		memset(dst, 0, pwc->view.x * pwc->view.y);
-#endif
-
-	} else {
-		/* YUV420P image format */
-		unsigned char *pout_planar_y;
-		unsigned char *pout_planar_u;
-		unsigned char *pout_planar_v;
-		unsigned int   plane_size;
-
-		plane_size = pwc->view.x * pwc->view.y;
-
-		/* offset in Y plane */
-		stride = pwc->view.x * pwc->offset.y;
-		pout_planar_y = dst + stride + pwc->offset.x;
-
-		/* offsets in U/V planes */
-		stride = (pwc->view.x * pwc->offset.y) / 4 + pwc->offset.x / 2;
-		pout_planar_u = dst + plane_size + stride;
-		pout_planar_v = dst + plane_size + plane_size / 4 + stride;
-
-		while (bandlines_left--) {
-
-			DecompressBand23(pwc->decompress_data,
-					 src,
-					 pout_planar_y, pout_planar_u, pout_planar_v,
-					 pwc->image.x, pwc->view.x);
-			src += pwc->vbandlength;
-			pout_planar_y += bytes_per_block;
-			pout_planar_u += pwc->view.x;
-			pout_planar_v += pwc->view.x;
-
-		}
+	plane_size = pwc->view.x * pwc->view.y;
+
+	/* offset in Y plane */
+	stride = pwc->view.x * pwc->offset.y;
+	pout_planar_y = dst + stride + pwc->offset.x;
+
+	/* offsets in U/V planes */
+	stride = (pwc->view.x * pwc->offset.y) / 4 + pwc->offset.x / 2;
+	pout_planar_u = dst + plane_size + stride;
+	pout_planar_v = dst + plane_size + plane_size / 4 + stride;
+
+	while (bandlines_left--) {
+		DecompressBand23(pwc->decompress_data,
+				 src,
+				 pout_planar_y, pout_planar_u, pout_planar_v,
+				 pwc->image.x, pwc->view.x);
+		src += pwc->vbandlength;
+		pout_planar_y += bytes_per_block;
+		pout_planar_u += pwc->view.x;
+		pout_planar_v += pwc->view.x;
 	}
-
 	mutex_unlock(&pdec->lock);
 }

drivers/media/video/pwc/pwc-dec23.h

@@ -54,6 +54,5 @@ struct pwc_dec23_private
 int pwc_dec23_init(struct pwc_device *pwc, int type, unsigned char *cmd);
 void pwc_dec23_decompress(const struct pwc_device *pwc,
 			  const void *src,
-			  void *dst,
-			  int flags);
+			  void *dst);
 #endif

drivers/media/video/pwc/pwc-if.c

@@ -743,8 +743,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
 	if (pdev->power_save) {
 		/* Restore video mode */
 		pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y,
-				   pdev->vframes, pdev->vcompression,
-				   pdev->vsnapshot);
+				   pdev->vframes, pdev->vcompression);
 	}
 	pwc_set_leds(pdev, led_on, led_off);
 
@@ -1131,7 +1130,7 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
 
 	/* Setup intial videomode */
 	rc = pwc_set_video_mode(pdev, pdev->view_max.x, pdev->view_max.y,
-				pdev->vframes, pdev->vcompression, 0);
+				pdev->vframes, pdev->vcompression);
 	if (rc)
 		goto err_free_mem;
 

drivers/media/video/pwc/pwc-uncompress.c

@@ -111,12 +111,6 @@ int pwc_decompress(struct pwc_device *pdev, struct pwc_frame_buf *fbuf)
 	 * the decompressor routines will write the data in planar format
 	 * immediately.
 	 */
-	if (pdev->vsize == PSZ_VGA && pdev->vframes == 5 && pdev->vsnapshot) {
-		PWC_ERROR("Mode Bayer is not supported for now\n");
-		/* flags |= PWCX_FLAG_BAYER; */
-		return -ENXIO; /* No such device or address: missing decompressor */
-	}
-
 	if (DEVICE_USE_CODEC1(pdev->type)) {
 
 		/* TODO & FIXME */
@@ -124,7 +118,7 @@ int pwc_decompress(struct pwc_device *pdev, struct pwc_frame_buf *fbuf)
 		return -ENXIO; /* No such device or address: missing decompressor */
 
 	} else {
-		pwc_dec23_decompress(pdev, yuv, image, PWCX_FLAG_PLANAR);
+		pwc_dec23_decompress(pdev, yuv, image);
 	}
 	return 0;
 }

drivers/media/video/pwc/pwc-v4l.c

@@ -513,7 +513,7 @@ static int pwc_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 				 f->fmt.pix.width,
 				 f->fmt.pix.height,
 				 pdev->vframes,
-				 pdev->vcompression, 0);
+				 pdev->vcompression);
 
 	PWC_DEBUG_IOCTL("pwc_set_video_mode(), return=%d\n", ret);
 

drivers/media/video/pwc/pwc.h

@@ -219,7 +219,7 @@ struct pwc_device
 	int vendpoint;		/* video isoc endpoint */
 	int vcinterface;	/* video control interface */
 	int valternate;		/* alternate interface needed */
-	int vframes, vsize;	/* frames-per-second & size (see PSZ_*) */
+	int vframes;		/* frames-per-second */
 	int pixfmt;		/* pixelformat: V4L2_PIX_FMT_YUV420 or _PWCX */
 	int vframe_count;	/* received frames */
 	int vmax_packet_size;	/* USB maxpacket size */
@@ -227,7 +227,6 @@ struct pwc_device
 	int visoc_errors;	/* number of contiguous ISOC errors */
 	int vcompression;	/* desired compression factor */
 	int vbandlength;	/* compressed band length; 0 is uncompressed */
-	char vsnapshot;		/* snapshot mode */
 	char vsync;		/* used by isoc handler */
 	char vmirror;		/* for ToUCaM series */
 	char power_save;	/* Do powersaving for this cam */
@@ -355,7 +354,8 @@ void pwc_construct(struct pwc_device *pdev);
 
 /** Functions in pwc-ctrl.c */
 /* Request a certain video mode. Returns < 0 if not possible */
-extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, int frames, int compression, int snapshot);
+extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
+			      int frames, int compression);
 extern unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size);
 extern int pwc_mpt_reset(struct pwc_device *pdev, int flags);
 extern int pwc_mpt_set_angle(struct pwc_device *pdev, int pan, int tilt);