[media] pwc: Make decoder data part of the main pwc struct

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

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

@@ -213,9 +213,7 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames,
 		return ret;
 	}
 	if (pEntry->compressed && pdev->pixfmt == V4L2_PIX_FMT_YUV420) {
-		ret = pwc_dec1_init(pdev, pdev->type, pdev->release, buf);
-		if (ret < 0)
-			return ret;
+		pwc_dec1_init(pdev, buf);
 	}
 
 	pdev->cmd_len = 3;
@@ -281,9 +279,7 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames,
 		return ret;
 
 	if (pChoose->bandlength > 0 && pdev->pixfmt == V4L2_PIX_FMT_YUV420) {
-		ret = pwc_dec23_init(pdev, pdev->type, buf);
-		if (ret < 0)
-			return ret;
+		pwc_dec23_init(pdev, buf);
 	}
 
 	pdev->cmd_len = 13;
@@ -341,9 +337,7 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames,
 		return ret;
 
 	if (pChoose->bandlength > 0 && pdev->pixfmt == V4L2_PIX_FMT_YUV420) {
-		ret = pwc_dec23_init(pdev, pdev->type, buf);
-		if (ret < 0)
-			return ret;
+		pwc_dec23_init(pdev, buf);
 	}
 
 	pdev->cmd_len = 12;
@@ -368,7 +362,8 @@ int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
 {
 	int ret, size;
 
-	PWC_DEBUG_FLOW("set_video_mode(%dx%d @ %d, pixfmt %08x).\n", width, height, frames, pdev->pixfmt);
+	PWC_DEBUG_FLOW("set_video_mode(%dx%d @ %d, pixfmt %08x).\n",
+		       width, height, frames, pdev->pixfmt);
 	size = pwc_get_size(pdev, width, height);
 	PWC_TRACE("decode_size = %d.\n", size);
 

drivers/media/video/pwc/pwc-dec1.c

@@ -22,19 +22,11 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
-#include "pwc-dec1.h"
+#include "pwc.h"
 
-int pwc_dec1_init(struct pwc_device *pwc, int type, int release, void *buffer)
+void pwc_dec1_init(struct pwc_device *pdev, void *buffer)
 {
-	struct pwc_dec1_private *pdec;
+	struct pwc_dec1_private *pdec = &pdev->dec1;
 
-	if (pwc->decompress_data == NULL) {
-		pdec = kmalloc(sizeof(struct pwc_dec1_private), GFP_KERNEL);
-		if (pdec == NULL)
-			return -ENOMEM;
-		pwc->decompress_data = pdec;
-	}
-	pdec = pwc->decompress_data;
-
-	return 0;
+	pdec->version = pdev->release;
 }

drivers/media/video/pwc/pwc-dec1.h

@@ -25,13 +25,15 @@
 #ifndef PWC_DEC1_H
 #define PWC_DEC1_H
 
-#include "pwc.h"
+#include <linux/mutex.h>
+
+struct pwc_device;
 
 struct pwc_dec1_private
 {
 	int version;
 };
 
-int pwc_dec1_init(struct pwc_device *pwc, int type, int release, void *buffer);
+void pwc_dec1_init(struct pwc_device *pdev, void *buffer);
 
 #endif

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

@@ -294,22 +294,14 @@ static unsigned char pwc_crop_table[256 + 2*MAX_OUTER_CROP_VALUE];
 
 
 /* If the type or the command change, we rebuild the lookup table */
-int pwc_dec23_init(struct pwc_device *pwc, int type, unsigned char *cmd)
+void pwc_dec23_init(struct pwc_device *pdev, unsigned char *cmd)
 {
 	int flags, version, shift, i;
-	struct pwc_dec23_private *pdec;
-
-	if (pwc->decompress_data == NULL) {
-		pdec = kmalloc(sizeof(struct pwc_dec23_private), GFP_KERNEL);
-		if (pdec == NULL)
-			return -ENOMEM;
-		pwc->decompress_data = pdec;
-	}
-	pdec = pwc->decompress_data;
+	struct pwc_dec23_private *pdec = &pdev->dec23;
 
 	mutex_init(&pdec->lock);
 
-	if (DEVICE_USE_CODEC3(type)) {
+	if (DEVICE_USE_CODEC3(pdev->type)) {
 		flags = cmd[2] & 0x18;
 		if (flags == 8)
 			pdec->nbits = 7;	/* More bits, mean more bits to encode the stream, but better quality */
@@ -355,8 +347,6 @@ int pwc_dec23_init(struct pwc_device *pwc, int type, unsigned char *cmd)
 	for (i=0; i<MAX_OUTER_CROP_VALUE; i++)
 		pwc_crop_table[MAX_OUTER_CROP_VALUE+256+i] = 255;
 #endif
-
-	return 0;
 }
 
 /*
@@ -659,12 +649,12 @@ static void DecompressBand23(struct pwc_dec23_private *pdec,
  * src: raw data
  * dst: image output
  */
-void pwc_dec23_decompress(const struct pwc_device *pwc,
+void pwc_dec23_decompress(struct pwc_device *pdev,
 			  const void *src,
 			  void *dst)
 {
 	int bandlines_left, bytes_per_block;
-	struct pwc_dec23_private *pdec = pwc->decompress_data;
+	struct pwc_dec23_private *pdec = &pdev->dec23;
 
 	/* YUV420P image format */
 	unsigned char *pout_planar_y;
@@ -674,23 +664,22 @@ void pwc_dec23_decompress(const struct pwc_device *pwc,
 
 	mutex_lock(&pdec->lock);
 
-	bandlines_left = pwc->height / 4;
-	bytes_per_block = pwc->width * 4;
-	plane_size = pwc->height * pwc->width;
+	bandlines_left = pdev->height / 4;
+	bytes_per_block = pdev->width * 4;
+	plane_size = pdev->height * pdev->width;
 
 	pout_planar_y = dst;
 	pout_planar_u = dst + plane_size;
 	pout_planar_v = dst + plane_size + plane_size / 4;
 
 	while (bandlines_left--) {
-		DecompressBand23(pwc->decompress_data,
-				 src,
+		DecompressBand23(pdec, src,
 				 pout_planar_y, pout_planar_u, pout_planar_v,
-				 pwc->width, pwc->width);
-		src += pwc->vbandlength;
+				 pdev->width, pdev->width);
+		src += pdev->vbandlength;
 		pout_planar_y += bytes_per_block;
-		pout_planar_u += pwc->width;
-		pout_planar_v += pwc->width;
+		pout_planar_u += pdev->width;
+		pout_planar_v += pdev->width;
 	}
 	mutex_unlock(&pdec->lock);
 }

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

@@ -25,7 +25,7 @@
 #ifndef PWC_DEC23_H
 #define PWC_DEC23_H
 
-#include "pwc.h"
+struct pwc_device;
 
 struct pwc_dec23_private
 {
@@ -51,8 +51,8 @@ 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,
+void pwc_dec23_init(struct pwc_device *pdev, unsigned char *cmd);
+void pwc_dec23_decompress(struct pwc_device *pdev,
 			  const void *src,
 			  void *dst);
 #endif

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

@@ -603,14 +603,6 @@ static void pwc_video_release(struct v4l2_device *v)
 		if (device_hint[hint].pdev == pdev)
 			device_hint[hint].pdev = NULL;
 
-	/* Free intermediate decompression buffer & tables */
-	if (pdev->decompress_data != NULL) {
-		PWC_DEBUG_MEMORY("Freeing decompression buffer at %p.\n",
-				 pdev->decompress_data);
-		kfree(pdev->decompress_data);
-		pdev->decompress_data = NULL;
-	}
-
 	v4l2_ctrl_handler_free(&pdev->ctrl_handler);
 
 	kfree(pdev);

drivers/media/video/pwc/pwc.h

@@ -44,6 +44,8 @@
 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
 #include <linux/input.h>
 #endif
+#include "pwc-dec1.h"
+#include "pwc-dec23.h"
 
 /* Version block */
 #define PWC_VERSION	"10.0.15"
@@ -272,7 +274,10 @@ struct pwc_device
 	int frame_total_size;	/* including header & trailer */
 	int drop_frames;
 
-	void *decompress_data;	/* private data for decompression engine */
+	union {	/* private data for decompression engine */
+		struct pwc_dec1_private dec1;
+		struct pwc_dec23_private dec23;
+	};
 
 	/*
 	 * We have an 'image' and a 'view', where 'image' is the fixed-size img