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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/drivers/media/usb/gspca/gspca.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Main USB camera driver
34  *
....@@ -5,16 +6,6 @@
56  *
67  * Camera button input handling by Márton Németh
78  * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
8
- *
9
- * This program is free software; you can redistribute it and/or modify it
10
- * under the terms of the GNU General Public License as published by the
11
- * Free Software Foundation; either version 2 of the License, or (at your
12
- * option) any later version.
13
- *
14
- * This program is distributed in the hope that it will be useful, but
15
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16
- * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
17
- * for more details.
189  */
1910 
2011 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
....@@ -916,23 +907,30 @@
916907 }
917908 
918909 static int wxh_to_mode(struct gspca_dev *gspca_dev,
919
-			int width, int height)
910
+			int width, int height, u32 pixelformat)
920911 {
921912 	int i;
922913 
923914 	for (i = 0; i < gspca_dev->cam.nmodes; i++) {
924915 		if (width == gspca_dev->cam.cam_mode[i].width
925
-		    && height == gspca_dev->cam.cam_mode[i].height)
916
+		    && height == gspca_dev->cam.cam_mode[i].height
917
+		    && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
926918 			return i;
927919 	}
928920 	return -EINVAL;
929921 }
930922 
931923 static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev,
932
-			int width, int height)
924
+			int width, int height, u32 pixelformat)
933925 {
934926 	int i;
935927 
928
+	for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
929
+		if (width >= gspca_dev->cam.cam_mode[i].width
930
+		    && height >= gspca_dev->cam.cam_mode[i].height
931
+		    && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat)
932
+			return i;
933
+	}
936934 	for (i = gspca_dev->cam.nmodes; --i > 0; ) {
937935 		if (width >= gspca_dev->cam.cam_mode[i].width
938936 		    && height >= gspca_dev->cam.cam_mode[i].height)
....@@ -1026,27 +1024,18 @@
10261024 		return -EINVAL;		/* no more format */
10271025 
10281026 	fmtdesc->pixelformat = fmt_tb[index];
1029
-	if (gspca_dev->cam.cam_mode[i].sizeimage <
1030
-			gspca_dev->cam.cam_mode[i].width *
1031
-				gspca_dev->cam.cam_mode[i].height)
1032
-		fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1033
-	fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1034
-	fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1035
-	fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1036
-	fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1037
-	fmtdesc->description[4] = '\0';
10381027 	return 0;
10391028 }
10401029 
1041
-static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1042
-			    struct v4l2_format *fmt)
1030
+static int vidioc_g_fmt_vid_cap(struct file *file, void *_priv,
1031
+				struct v4l2_format *fmt)
10431032 {
10441033 	struct gspca_dev *gspca_dev = video_drvdata(file);
1034
+	u32 priv = fmt->fmt.pix.priv;
10451035 
10461036 	fmt->fmt.pix = gspca_dev->pixfmt;
1047
-	/* some drivers use priv internally, zero it before giving it back to
1048
-	   the core */
1049
-	fmt->fmt.pix.priv = 0;
1037
+	/* some drivers use priv internally, so keep the original value */
1038
+	fmt->fmt.pix.priv = priv;
10501039 	return 0;
10511040 }
10521041 
....@@ -1062,7 +1051,7 @@
10621051 		    fmt->fmt.pix.pixelformat, w, h);
10631052 
10641053 	/* search the nearest mode for width and height */
1065
-	mode = wxh_to_nearest_mode(gspca_dev, w, h);
1054
+	mode = wxh_to_nearest_mode(gspca_dev, w, h, fmt->fmt.pix.pixelformat);
10661055 
10671056 	/* OK if right palette */
10681057 	if (gspca_dev->cam.cam_mode[mode].pixelformat
....@@ -1081,27 +1070,27 @@
10811070 		fmt->fmt.pix.height = h;
10821071 		gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
10831072 	}
1084
-	/* some drivers use priv internally, zero it before giving it back to
1085
-	   the core */
1086
-	fmt->fmt.pix.priv = 0;
10871073 	return mode;			/* used when s_fmt */
10881074 }
10891075 
1090
-static int vidioc_try_fmt_vid_cap(struct file *file,
1091
-			      void *priv,
1092
-			      struct v4l2_format *fmt)
1076
+static int vidioc_try_fmt_vid_cap(struct file *file, void *_priv,
1077
+				  struct v4l2_format *fmt)
10931078 {
10941079 	struct gspca_dev *gspca_dev = video_drvdata(file);
1080
+	u32 priv = fmt->fmt.pix.priv;
10951081 
10961082 	if (try_fmt_vid_cap(gspca_dev, fmt) < 0)
10971083 		return -EINVAL;
1084
+	/* some drivers use priv internally, so keep the original value */
1085
+	fmt->fmt.pix.priv = priv;
10981086 	return 0;
10991087 }
11001088 
1101
-static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1102
-			    struct v4l2_format *fmt)
1089
+static int vidioc_s_fmt_vid_cap(struct file *file, void *_priv,
1090
+				struct v4l2_format *fmt)
11031091 {
11041092 	struct gspca_dev *gspca_dev = video_drvdata(file);
1093
+	u32 priv = fmt->fmt.pix.priv;
11051094 	int mode;
11061095 
11071096 	if (vb2_is_busy(&gspca_dev->queue))
....@@ -1117,6 +1106,8 @@
11171106 		gspca_dev->pixfmt = fmt->fmt.pix;
11181107 	else
11191108 		gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode];
1109
+	/* some drivers use priv internally, so keep the original value */
1110
+	fmt->fmt.pix.priv = priv;
11201111 	return 0;
11211112 }
11221113 
....@@ -1156,7 +1147,8 @@
11561147 	int mode;
11571148 	__u32 i;
11581149 
1159
-	mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1150
+	mode = wxh_to_mode(gspca_dev, fival->width, fival->height,
1151
+			   fival->pixel_format);
11601152 	if (mode < 0)
11611153 		return -EINVAL;
11621154 
....@@ -1197,11 +1189,11 @@
11971189 {
11981190 	struct gspca_dev *gspca_dev = video_drvdata(file);
11991191 
1200
-	strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
1201
-			sizeof cap->driver);
1192
+	strscpy((char *)cap->driver, gspca_dev->sd_desc->name,
1193
+		sizeof(cap->driver));
12021194 	if (gspca_dev->dev->product != NULL) {
1203
-		strlcpy((char *) cap->card, gspca_dev->dev->product,
1204
-			sizeof cap->card);
1195
+		strscpy((char *)cap->card, gspca_dev->dev->product,
1196
+			sizeof(cap->card));
12051197 	} else {
12061198 		snprintf((char *) cap->card, sizeof cap->card,
12071199 			"USB Camera (%04x:%04x)",
....@@ -1210,10 +1202,6 @@
12101202 	}
12111203 	usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
12121204 			sizeof(cap->bus_info));
1213
-	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
1214
-			  | V4L2_CAP_STREAMING
1215
-			  | V4L2_CAP_READWRITE;
1216
-	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
12171205 	return 0;
12181206 }
12191207 
....@@ -1226,7 +1214,7 @@
12261214 		return -EINVAL;
12271215 	input->type = V4L2_INPUT_TYPE_CAMERA;
12281216 	input->status = gspca_dev->cam.input_flags;
1229
-	strlcpy(input->name, gspca_dev->sd_desc->name,
1217
+	strscpy(input->name, gspca_dev->sd_desc->name,
12301218 		sizeof input->name);
12311219 	return 0;
12321220 }
....@@ -1509,6 +1497,8 @@
15091497 	gspca_dev->empty_packet = -1;	/* don't check the empty packets */
15101498 	gspca_dev->vdev = gspca_template;
15111499 	gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
1500
+	gspca_dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE |
1501
+				      V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
15121502 	video_set_drvdata(&gspca_dev->vdev, gspca_dev);
15131503 	gspca_dev->module = module;
15141504 
....@@ -1565,7 +1555,7 @@
15651555 
15661556 	/* init video stuff */
15671557 	ret = video_register_device(&gspca_dev->vdev,
1568
-				  VFL_TYPE_GRABBER,
1558
+				  VFL_TYPE_VIDEO,
15691559 				  -1);
15701560 	if (ret < 0) {
15711561 		pr_err("video_register_device err %d\n", ret);