The uvcvideo driver historically uses the /* Comment * style */ for multi-line block comments, which is frowned upon. Patches for the driver are required to use the more standard /* * Comment * style */ style. This result in inconsistencies. Fix it by converting all remaining instances of the old style. Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> --- drivers/media/usb/uvc/uvc_ctrl.c | 33 ++++++---- drivers/media/usb/uvc/uvc_driver.c | 54 +++++++++++------ drivers/media/usb/uvc/uvc_isight.c | 13 ++-- drivers/media/usb/uvc/uvc_queue.c | 6 +- drivers/media/usb/uvc/uvc_status.c | 6 +- drivers/media/usb/uvc/uvc_v4l2.c | 15 +++-- drivers/media/usb/uvc/uvc_video.c | 96 ++++++++++++++++++++---------- drivers/media/usb/uvc/uvcvideo.h | 15 ++--- 8 files changed, 156 insertions(+), 82 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index 0e78233fc8a0..e1d57602bc37 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -749,7 +749,8 @@ static inline void uvc_clear_bit(u8 *data, int bit) data[bit >> 3] &= ~(1 << (bit & 7)); } -/* Extract the bit string specified by mapping->offset and mapping->size +/* + * Extract the bit string specified by mapping->offset and mapping->size * from the little-endian data stored at 'data' and return the result as * a signed 32bit integer. Sign extension will be performed if the mapping * references a signed data type. @@ -785,7 +786,8 @@ static s32 uvc_get_le_value(struct uvc_control_mapping *mapping, return value; } -/* Set the bit string specified by mapping->offset and mapping->size +/* + * Set the bit string specified by mapping->offset and mapping->size * in the little-endian data stored at 'data' to the value 'value'. */ static void uvc_set_le_value(struct uvc_control_mapping *mapping, @@ -795,7 +797,8 @@ static void uvc_set_le_value(struct uvc_control_mapping *mapping, int offset = mapping->offset; u8 mask; - /* According to the v4l2 spec, writing any value to a button control + /* + * According to the v4l2 spec, writing any value to a button control * should result in the action belonging to the button control being * triggered. UVC devices however want to see a 1 written -> override * value. @@ -927,7 +930,8 @@ static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, UVC_VC_EXTENSION_UNIT) return ret; - /* GET_RES is mandatory for XU controls, but some + /* + * GET_RES is mandatory for XU controls, but some * cameras still choke on it. Ignore errors and set the * resolution value to zero. */ @@ -1522,8 +1526,10 @@ static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val, changes); - /* Mark the queue as active, allowing this initial - event to be accepted. */ + /* + * Mark the queue as active, allowing this initial event to be + * accepted. + */ sev->elems = elems; v4l2_event_queue_fh(sev->fh, &ev); } @@ -1596,7 +1602,8 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, if (!ctrl->initialized) continue; - /* Reset the loaded flag for auto-update controls that were + /* + * Reset the loaded flag for auto-update controls that were * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent * uvc_ctrl_get from using the cached value, and for write-only * controls to prevent uvc_ctrl_set from setting bits not @@ -1755,7 +1762,8 @@ int uvc_ctrl_set(struct uvc_fh *handle, return -ERANGE; value = mapping->menu_info[xctrl->value].value; - /* Valid menu indices are reported by the GET_RES request for + /* + * Valid menu indices are reported by the GET_RES request for * UVC controls that support it. */ if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && @@ -1779,7 +1787,8 @@ int uvc_ctrl_set(struct uvc_fh *handle, break; } - /* If the mapping doesn't span the whole UVC control, the current value + /* + * If the mapping doesn't span the whole UVC control, the current value * needs to be loaded from the device to perform the read-modify-write * operation. */ @@ -2180,7 +2189,8 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain, unsigned int size; unsigned int i; - /* Most mappings come from static kernel data and need to be duplicated. + /* + * Most mappings come from static kernel data and need to be duplicated. * Mappings that come from userspace will be unnecessarily duplicated, * this could be optimized. */ @@ -2389,7 +2399,8 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain, const struct uvc_control_mapping *mend = mapping + ARRAY_SIZE(uvc_ctrl_mappings); - /* XU controls initialization requires querying the device for control + /* + * XU controls initialization requires querying the device for control * information. As some buggy UVC devices will crash when queried * repeatedly in a tight loop, delay XU controls initialization until * first use. diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 6c86faecbea2..77ac5716f99d 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -329,7 +329,8 @@ static enum v4l2_ycbcr_encoding uvc_ycbcr_enc(const u8 matrix_coefficients) return V4L2_YCBCR_ENC_DEFAULT; /* Reserved */ } -/* Simplify a fraction using a simple continued fraction decomposition. The +/* + * Simplify a fraction using a simple continued fraction decomposition. The * idea here is to convert fractions such as 333333/10000000 to 1/30 using * 32 bit arithmetic only. The algorithm is not perfect and relies upon two * arbitrary parameters to remove non-significative terms from the simple @@ -347,7 +348,8 @@ void uvc_simplify_fraction(u32 *numerator, u32 *denominator, if (an == NULL) return; - /* Convert the fraction to a simple continued fraction. See + /* + * Convert the fraction to a simple continued fraction. See * https://mathforum.org/dr.math/faq/faq.fractions.html * Stop if the current term is bigger than or equal to the given * threshold. @@ -383,7 +385,8 @@ void uvc_simplify_fraction(u32 *numerator, u32 *denominator, kfree(an); } -/* Convert a fraction to a frame interval in 100ns multiples. The idea here is +/* + * Convert a fraction to a frame interval in 100ns multiples. The idea here is * to compute numerator / denominator * 10000000 using 32 bit fixed point * arithmetic only. */ @@ -396,7 +399,8 @@ u32 uvc_fraction_to_interval(u32 numerator, u32 denominator) numerator/denominator >= ((u32)-1)/10000000) return (u32)-1; - /* Divide both the denominator and the multiplier by two until + /* + * Divide both the denominator and the multiplier by two until * numerator * multiplier doesn't overflow. If anyone knows a better * algorithm please let me know. */ @@ -548,7 +552,8 @@ static int uvc_parse_format(struct uvc_device *dev, format->bpp = buffer[21]; - /* Some devices report a format that doesn't match what they + /* + * Some devices report a format that doesn't match what they * really send. */ if (dev->quirks & UVC_QUIRK_FORCE_Y8) { @@ -663,7 +668,8 @@ static int uvc_parse_format(struct uvc_device *dev, buflen -= buffer[0]; buffer += buffer[0]; - /* Parse the frame descriptors. Only uncompressed, MJPEG and frame + /* + * Parse the frame descriptors. Only uncompressed, MJPEG and frame * based formats have frame descriptors. */ while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && @@ -705,7 +711,8 @@ static int uvc_parse_format(struct uvc_device *dev, } frame->dwFrameInterval = *intervals; - /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize + /* + * Several UVC chipsets screw up dwMaxVideoFrameBufferSize * completely. Observed behaviours range from setting the * value to 1.1x the actual frame size to hardwiring the * 16 low bits to 0. This results in a higher than necessary @@ -717,7 +724,8 @@ static int uvc_parse_format(struct uvc_device *dev, frame->dwMaxVideoFrameBufferSize = format->bpp * frame->wWidth * frame->wHeight / 8; - /* Some bogus devices report dwMinFrameInterval equal to + /* + * Some bogus devices report dwMinFrameInterval equal to * dwMaxFrameInterval and have dwFrameIntervalStep set to * zero. Setting all null intervals to 1 fixes the problem and * some other divisions by zero that could happen. @@ -727,7 +735,8 @@ static int uvc_parse_format(struct uvc_device *dev, *(*intervals)++ = interval ? interval : 1; } - /* Make sure that the default frame interval stays between + /* + * Make sure that the default frame interval stays between * the boundaries. */ n -= frame->bFrameIntervalType ? 1 : 2; @@ -819,7 +828,8 @@ static int uvc_parse_streaming(struct uvc_device *dev, return -ENOMEM; } - /* The Pico iMage webcam has its class-specific interface descriptors + /* + * The Pico iMage webcam has its class-specific interface descriptors * after the endpoint descriptors. */ if (buflen == 0) { @@ -918,7 +928,8 @@ static int uvc_parse_streaming(struct uvc_device *dev, break; case UVC_VS_FORMAT_DV: - /* DV format has no frame descriptor. We will create a + /* + * DV format has no frame descriptor. We will create a * dummy frame descriptor with a dummy frame interval. */ nformats++; @@ -1105,7 +1116,8 @@ static int uvc_parse_vendor_control(struct uvc_device *dev, if (buffer[1] != 0x41 || buffer[2] != 0x01) break; - /* Logitech implements several vendor specific functions + /* + * Logitech implements several vendor specific functions * through vendor specific extension units (LXU). * * The LXU descriptors are similar to XU descriptors @@ -1303,7 +1315,8 @@ static int uvc_parse_standard_control(struct uvc_device *dev, return -EINVAL; } - /* Make sure the terminal type MSB is not null, otherwise it + /* + * Make sure the terminal type MSB is not null, otherwise it * could be confused with a unit. */ type = get_unaligned_le16(&buffer[4]); @@ -1437,7 +1450,8 @@ static int uvc_parse_control(struct uvc_device *dev) int buflen = alts->extralen; int ret; - /* Parse the default alternate setting only, as the UVC specification + /* + * Parse the default alternate setting only, as the UVC specification * defines a single alternate setting, the default alternate setting * zero. */ @@ -1455,7 +1469,8 @@ static int uvc_parse_control(struct uvc_device *dev) buffer += buffer[0]; } - /* Check if the optional status endpoint is present. Built-in iSight + /* + * Check if the optional status endpoint is present. Built-in iSight * webcams have an interrupt endpoint but spit proprietary data that * don't conform to the UVC status endpoint messages. Don't try to * handle the interrupt endpoint for those cameras. @@ -2057,7 +2072,8 @@ static int uvc_scan_device(struct uvc_device *dev) if (!UVC_ENTITY_IS_OTERM(term)) continue; - /* If the terminal is already included in a chain, skip it. + /* + * If the terminal is already included in a chain, skip it. * This can happen for chains that have multiple output * terminals, where all output terminals beside the first one * will be inserted in the chain in forward scans. @@ -2309,7 +2325,8 @@ static int uvc_register_terms(struct uvc_device *dev, if (ret < 0) return ret; - /* Register a metadata node, but ignore a possible failure, + /* + * Register a metadata node, but ignore a possible failure, * complete registration of video nodes anyway. */ uvc_meta_register(stream); @@ -2507,7 +2524,8 @@ static void uvc_disconnect(struct usb_interface *intf) { struct uvc_device *dev = usb_get_intfdata(intf); - /* Set the USB interface data to NULL. This can be done outside the + /* + * Set the USB interface data to NULL. This can be done outside the * lock, as there's no other reader. */ usb_set_intfdata(intf, NULL); diff --git a/drivers/media/usb/uvc/uvc_isight.c b/drivers/media/usb/uvc/uvc_isight.c index 2578d6ee4829..43cda5e760a3 100644 --- a/drivers/media/usb/uvc/uvc_isight.c +++ b/drivers/media/usb/uvc/uvc_isight.c @@ -14,7 +14,8 @@ #include "uvcvideo.h" -/* Built-in iSight webcams implements most of UVC 1.0 except a +/* + * Built-in iSight webcams implements most of UVC 1.0 except a * different packet format. Instead of sending a header at the * beginning of each isochronous transfer payload, the webcam sends a * single header per image (on its own in a packet), followed by @@ -65,7 +66,8 @@ static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, buf->state = UVC_BUF_STATE_ACTIVE; } - /* Mark the buffer as done if we're at the beginning of a new frame. + /* + * Mark the buffer as done if we're at the beginning of a new frame. * * Empty buffers (bytesused == 0) don't trigger end of frame detection * as it doesn't make sense to return an empty buffer. @@ -75,7 +77,8 @@ static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, return -EAGAIN; } - /* Copy the video data to the buffer. Skip header packets, as they + /* + * Copy the video data to the buffer. Skip header packets, as they * contain no data. */ if (!is_header) { @@ -109,7 +112,9 @@ void uvc_video_decode_isight(struct uvc_urb *uvc_urb, struct uvc_buffer *buf, urb->iso_frame_desc[i].status); } - /* Decode the payload packet. + /* + * Decode the payload packet. + * * uvc_video_decode is entered twice when a frame transition * has been detected because the end of frame can only be * reliably detected when the first packet of the new frame diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c index 21a907d32bb7..16fa17bbd15e 100644 --- a/drivers/media/usb/uvc/uvc_queue.c +++ b/drivers/media/usb/uvc/uvc_queue.c @@ -135,7 +135,8 @@ static void uvc_buffer_queue(struct vb2_buffer *vb) kref_init(&buf->ref); list_add_tail(&buf->queue, &queue->irqqueue); } else { - /* If the device is disconnected return the buffer to userspace + /* + * If the device is disconnected return the buffer to userspace * directly. The next QBUF call will fail with -ENODEV. */ buf->state = UVC_BUF_STATE_ERROR; @@ -412,7 +413,8 @@ void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect) spin_lock_irqsave(&queue->irqlock, flags); uvc_queue_return_buffers(queue, UVC_BUF_STATE_ERROR); - /* This must be protected by the irqlock spinlock to avoid race + /* + * This must be protected by the irqlock spinlock to avoid race * conditions between uvc_buffer_queue and the disconnection event that * could result in an interruptible wait in uvc_dequeue_buffer. Do not * blindly replace this logic by checking for the UVC_QUEUE_DISCONNECTED diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c index 753c8226db70..7518ffce22ed 100644 --- a/drivers/media/usb/uvc/uvc_status.c +++ b/drivers/media/usb/uvc/uvc_status.c @@ -202,8 +202,7 @@ static void uvc_status_complete(struct urb *urb) case -ENOENT: /* usb_kill_urb() called. */ case -ECONNRESET: /* usb_unlink_urb() called. */ case -ESHUTDOWN: /* The endpoint is being disabled. */ - case -EPROTO: /* Device is disconnected (reported by some - * host controller). */ + case -EPROTO: /* Device is disconnected (reported by some host controllers). */ return; default: @@ -272,7 +271,8 @@ int uvc_status_init(struct uvc_device *dev) pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress); - /* For high-speed interrupt endpoints, the bInterval value is used as + /* + * For high-speed interrupt endpoints, the bInterval value is used as * an exponent of two. Some developers forgot about it. */ interval = ep->desc.bInterval; diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index 648dcd579e81..b36f9cc57cd4 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -63,7 +63,8 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, break; case V4L2_CTRL_TYPE_MENU: - /* Prevent excessive memory consumption, as well as integer + /* + * Prevent excessive memory consumption, as well as integer * overflows. */ if (xmap->menu_count == 0 || @@ -177,7 +178,8 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, fcc[0], fcc[1], fcc[2], fcc[3], fmt->fmt.pix.width, fmt->fmt.pix.height); - /* Check if the hardware supports the requested format, use the default + /* + * Check if the hardware supports the requested format, use the default * format otherwise. */ for (i = 0; i < stream->nformats; ++i) { @@ -191,7 +193,8 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, fmt->fmt.pix.pixelformat = format->fcc; } - /* Find the closest image size. The distance between image sizes is + /* + * Find the closest image size. The distance between image sizes is * the size in pixels of the non-overlapping regions between the * requested size and the frame-specified size. */ @@ -233,7 +236,8 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, probe->bFormatIndex = format->index; probe->bFrameIndex = frame->bFrameIndex; probe->dwFrameInterval = uvc_try_frame_interval(frame, interval); - /* Some webcams stall the probe control set request when the + /* + * Some webcams stall the probe control set request when the * dwMaxVideoFrameSize field is set to zero. The UVC specification * clearly states that the field is read-only from the host, so this * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by @@ -256,7 +260,8 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, if (ret < 0) goto done; - /* After the probe, update fmt with the values returned from + /* + * After the probe, update fmt with the values returned from * negotiation with the device. Some devices return invalid bFormatIndex * and bFrameIndex values, in which case we can only assume they have * accepted the requested format as-is. diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index 6d3dfa4e0bb2..170a008f4006 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -189,7 +189,8 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream, ctrl->dwMaxVideoFrameSize = frame->dwMaxVideoFrameBufferSize; - /* The "TOSHIBA Web Camera - 5M" Chicony device (04f2:b50b) seems to + /* + * The "TOSHIBA Web Camera - 5M" Chicony device (04f2:b50b) seems to * compute the bandwidth on 16 bits and erroneously sign-extend it to * 32 bits, resulting in a huge bandwidth value. Detect and fix that * condition by setting the 16 MSBs to 0 when they're all equal to 1. @@ -207,7 +208,8 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream, ? ctrl->dwFrameInterval : frame->dwFrameInterval[0]; - /* Compute a bandwidth estimation by multiplying the frame + /* + * Compute a bandwidth estimation by multiplying the frame * size by the number of video frames per second, divide the * result by the number of USB frames (or micro-frames for * high-speed devices) per second and add the UVC header size @@ -220,7 +222,8 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream, bandwidth /= 8; bandwidth += 12; - /* The bandwidth estimate is too low for many cameras. Don't use + /* + * The bandwidth estimate is too low for many cameras. Don't use * maximum packet sizes lower than 1024 bytes to try and work * around the problem. According to measurements done on two * different camera models, the value is high enough to get most @@ -267,7 +270,8 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream, size, uvc_timeout_param); if ((query == UVC_GET_MIN || query == UVC_GET_MAX) && ret == 2) { - /* Some cameras, mostly based on Bison Electronics chipsets, + /* + * Some cameras, mostly based on Bison Electronics chipsets, * answer a GET_MIN or GET_MAX request with the wCompQuality * field only. */ @@ -279,7 +283,8 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream, ret = 0; goto out; } else if (query == UVC_GET_DEF && probe == 1 && ret != size) { - /* Many cameras don't support the GET_DEF request on their + /* + * Many cameras don't support the GET_DEF request on their * video probe control. Warn once and return, the caller will * fall back to GET_CUR. */ @@ -322,7 +327,8 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream, ctrl->bMaxVersion = 0; } - /* Some broken devices return null or wrong dwMaxVideoFrameSize and + /* + * Some broken devices return null or wrong dwMaxVideoFrameSize and * dwMaxPayloadTransferSize fields. Try to get the value from the * format and frame descriptors. */ @@ -386,7 +392,8 @@ int uvc_probe_video(struct uvc_streaming *stream, unsigned int i; int ret; - /* Perform probing. The device should adjust the requested values + /* + * Perform probing. The device should adjust the requested values * according to its capabilities. However, some devices, namely the * first generation UVC Logitech webcams, don't implement the Video * Probe control properly, and just return the needed bandwidth. For @@ -493,7 +500,8 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, if (len < header_size) return; - /* Extract the timestamps: + /* + * Extract the timestamps: * * - store the frame PTS in the buffer structure * - if the SCR field is present, retrieve the host SOF counter and @@ -506,7 +514,8 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, if (!has_scr) return; - /* To limit the amount of data, drop SCRs with an SOF identical to the + /* + * To limit the amount of data, drop SCRs with an SOF identical to the * previous one. */ dev_sof = get_unaligned_le16(&data[header_size - 2]); @@ -518,7 +527,8 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, host_sof = usb_get_current_frame_number(stream->dev->udev); time = uvc_video_get_time(); - /* The UVC specification allows device implementations that can't obtain + /* + * The UVC specification allows device implementations that can't obtain * the USB frame number to keep their own frame counters as long as they * match the size and frequency of the frame number associated with USB * SOF tokens. The SOF values sent by such devices differ from the USB @@ -756,7 +766,8 @@ void uvc_video_clock_update(struct uvc_streaming *stream, y1 = NSEC_PER_SEC; y2 = (u32)ktime_to_ns(ktime_sub(last->host_time, first->host_time)) + y1; - /* Interpolated and host SOF timestamps can wrap around at slightly + /* + * Interpolated and host SOF timestamps can wrap around at slightly * different times. Handle this by adding or removing 2048 to or from * the computed SOF value to keep it close to the SOF samples mean * value. @@ -854,7 +865,8 @@ static void uvc_video_stats_decode(struct uvc_streaming *stream, stream->stats.frame.pts = pts; } - /* Do all frames have a PTS in their first non-empty packet, or before + /* + * Do all frames have a PTS in their first non-empty packet, or before * their first empty packet ? */ if (stream->stats.frame.size == 0) { @@ -945,7 +957,8 @@ size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf, unsigned int duration; size_t count = 0; - /* Compute the SCR.SOF frequency estimate. At the nominal 1kHz SOF + /* + * Compute the SCR.SOF frequency estimate. At the nominal 1kHz SOF * frequency this will not overflow before more than 1h. */ duration = ktime_ms_delta(stream->stats.stream.stop_ts, @@ -997,7 +1010,8 @@ static void uvc_video_stats_stop(struct uvc_streaming *stream) * Video codecs */ -/* Video payload decoding is handled by uvc_video_decode_start(), +/* + * Video payload decoding is handled by uvc_video_decode_start(), * uvc_video_decode_data() and uvc_video_decode_end(). * * uvc_video_decode_start is called with URB data at the start of a bulk or @@ -1037,7 +1051,8 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, { u8 fid; - /* Sanity checks: + /* + * Sanity checks: * - packet must be at least 2 bytes long * - bHeaderLength value must be at least 2 bytes (see above) * - bHeaderLength value can't be larger than the packet size. @@ -1049,7 +1064,8 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, fid = data[1] & UVC_STREAM_FID; - /* Increase the sequence number regardless of any buffer states, so + /* + * Increase the sequence number regardless of any buffer states, so * that discontinuous sequence numbers always indicate lost frames. */ if (stream->last_fid != fid) { @@ -1061,7 +1077,8 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, uvc_video_clock_decode(stream, buf, data, len); uvc_video_stats_decode(stream, data, len); - /* Store the payload FID bit and return immediately when the buffer is + /* + * Store the payload FID bit and return immediately when the buffer is * NULL. */ if (buf == NULL) { @@ -1076,7 +1093,8 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, buf->error = 1; } - /* Synchronize to the input stream by waiting for the FID bit to be + /* + * Synchronize to the input stream by waiting for the FID bit to be * toggled when the the buffer state is not UVC_BUF_STATE_ACTIVE. * stream->last_fid is initialized to -1, so the first isochronous * frame will always be in sync. @@ -1102,7 +1120,8 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, buf->state = UVC_BUF_STATE_ACTIVE; } - /* Mark the buffer as done if we're at the beginning of a new frame. + /* + * Mark the buffer as done if we're at the beginning of a new frame. * End of frame detection is better implemented by checking the EOF * bit (FID bit toggling is delayed by one frame compared to the EOF * bit), but some devices don't set the bit at end of frame (and the @@ -1226,7 +1245,8 @@ static void uvc_video_decode_end(struct uvc_streaming *stream, } } -/* Video payload encoding is handled by uvc_video_encode_header() and +/* + * Video payload encoding is handled by uvc_video_encode_header() and * uvc_video_encode_data(). Only bulk transfers are currently supported. * * uvc_video_encode_header is called at the start of a payload. It adds header @@ -1450,7 +1470,8 @@ static void uvc_video_decode_bulk(struct uvc_urb *uvc_urb, len = urb->actual_length; stream->bulk.payload_size += len; - /* If the URB is the first of its payload, decode and save the + /* + * If the URB is the first of its payload, decode and save the * header. */ if (stream->bulk.header_size == 0 && !stream->bulk.skip_payload) { @@ -1474,7 +1495,8 @@ static void uvc_video_decode_bulk(struct uvc_urb *uvc_urb, } } - /* The buffer queue might have been cancelled while a bulk transfer + /* + * The buffer queue might have been cancelled while a bulk transfer * was in progress, so we can reach here with buf equal to NULL. Make * sure buf is never dereferenced if NULL. */ @@ -1483,7 +1505,8 @@ static void uvc_video_decode_bulk(struct uvc_urb *uvc_urb, if (!stream->bulk.skip_payload && buf != NULL) uvc_video_decode_data(uvc_urb, buf, mem, len); - /* Detect the payload end by a URB smaller than the maximum size (or + /* + * Detect the payload end by a URB smaller than the maximum size (or * a payload size equal to the maximum) and process the header again. */ if (urb->actual_length < urb->transfer_buffer_length || @@ -1686,7 +1709,8 @@ static int uvc_alloc_urb_buffers(struct uvc_streaming *stream, if (stream->urb_size) return stream->urb_size / psize; - /* Compute the number of packets. Bulk endpoints might transfer UVC + /* + * Compute the number of packets. Bulk endpoints might transfer UVC * payloads across multiple URBs. */ npackets = DIV_ROUND_UP(size, psize); @@ -1975,7 +1999,8 @@ static int uvc_video_start_transfer(struct uvc_streaming *stream, } } - /* The Logitech C920 temporarily forgets that it should not be adjusting + /* + * The Logitech C920 temporarily forgets that it should not be adjusting * Exposure Absolute during init so restore controls to stored values. */ if (stream->dev->quirks & UVC_QUIRK_RESTORE_CTRLS_ON_INIT) @@ -2018,7 +2043,8 @@ int uvc_video_resume(struct uvc_streaming *stream, int reset) { int ret; - /* If the bus has been reset on resume, set the alternate setting to 0. + /* + * If the bus has been reset on resume, set the alternate setting to 0. * This should be the default value, but some devices crash or otherwise * misbehave if they don't receive a SET_INTERFACE request before any * other video control request. @@ -2071,14 +2097,16 @@ int uvc_video_init(struct uvc_streaming *stream) atomic_set(&stream->active, 0); - /* Alternate setting 0 should be the default, yet the XBox Live Vision + /* + * Alternate setting 0 should be the default, yet the XBox Live Vision * Cam (and possibly other devices) crash or otherwise misbehave if * they don't receive a SET_INTERFACE request before any other video * control request. */ usb_set_interface(stream->dev->udev, stream->intfnum, 0); - /* Set the streaming probe control with default streaming parameters + /* + * Set the streaming probe control with default streaming parameters * retrieved from the device. Webcams that don't support GET_DEF * requests on the probe control will just keep their current streaming * parameters. @@ -2086,7 +2114,8 @@ int uvc_video_init(struct uvc_streaming *stream) if (uvc_get_video_ctrl(stream, probe, 1, UVC_GET_DEF) == 0) uvc_set_video_ctrl(stream, probe, 1); - /* Initialize the streaming parameters with the probe control current + /* + * Initialize the streaming parameters with the probe control current * value. This makes sure SET_CUR requests on the streaming commit * control will always use values retrieved from a successful GET_CUR * request on the probe control, as required by the UVC specification. @@ -2095,7 +2124,8 @@ int uvc_video_init(struct uvc_streaming *stream) if (ret < 0) return ret; - /* Check if the default format descriptor exists. Use the first + /* + * Check if the default format descriptor exists. Use the first * available format otherwise. */ for (i = stream->nformats; i > 0; --i) { @@ -2110,7 +2140,8 @@ int uvc_video_init(struct uvc_streaming *stream) return -EINVAL; } - /* Zero bFrameIndex might be correct. Stream-based formats (including + /* + * Zero bFrameIndex might be correct. Stream-based formats (including * MPEG-2 TS and DV) do not support frames but have a dummy frame * descriptor with bFrameIndex set to zero. If the default frame * descriptor is not found, use the first available frame. @@ -2187,7 +2218,8 @@ void uvc_video_stop_streaming(struct uvc_streaming *stream) if (stream->intf->num_altsetting > 1) { usb_set_interface(stream->dev->udev, stream->intfnum, 0); } else { - /* UVC doesn't specify how to inform a bulk-based device + /* + * UVC doesn't specify how to inform a bulk-based device * when the video stream is stopped. Windows sends a * CLEAR_FEATURE(HALT) request to the video streaming * bulk endpoint, mimic the same behaviour. diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index c5b4febd2d94..d2eb107347ea 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -225,7 +225,8 @@ struct gpio_desc; struct sg_table; struct uvc_device; -/* TODO: Put the most frequently accessed fields at the beginning of +/* + * TODO: Put the most frequently accessed fields at the beginning of * structures to maximize cache efficiency. */ struct uvc_control_info { @@ -270,8 +271,7 @@ struct uvc_control { struct uvc_entity *entity; struct uvc_control_info info; - u8 index; /* Used to match the uvc_control entry with a - uvc_control_info. */ + u8 index; /* Used to match the uvc_control entry with a uvc_control_info. */ u8 dirty:1, loaded:1, modified:1, @@ -289,7 +289,8 @@ struct uvc_format_desc { u32 fcc; }; -/* The term 'entity' refers to both UVC units and UVC terminals. +/* + * The term 'entity' refers to both UVC units and UVC terminals. * * The type field is either the terminal type (wTerminalType in the terminal * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor). @@ -308,8 +309,7 @@ struct uvc_format_desc { struct uvc_entity { struct list_head list; /* Entity as part of a UVC device. */ - struct list_head chain; /* Entity as part of a video device - * chain. */ + struct list_head chain; /* Entity as part of a video device chain. */ unsigned int flags; /* @@ -591,7 +591,8 @@ struct uvc_streaming { struct uvc_format *cur_format; struct uvc_frame *cur_frame; - /* Protect access to ctrl, cur_format, cur_frame and hardware video + /* + * Protect access to ctrl, cur_format, cur_frame and hardware video * probe control. */ struct mutex mutex; base-commit: f2906aa863381afb0015a9eb7fefad885d4e5a56 -- Regards, Laurent Pinchart
