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Date: Sun, 20 Dec 2020 19:13:15 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Ricardo Ribalda <ribalda@...omium.org>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
Joe Perches <joe@...ches.com>
Subject: Re: [PATCH v4 8/9] media: uvcvideo: New macro uvc_trace_cont
Hi Ricardo,
Thank you for the patch.
On Tue, Dec 15, 2020 at 04:44:38PM +0100, Ricardo Ribalda wrote:
> Remove all the duplicated code around pr_cont with a new macro.
>
> Suggested-by: Joe Perches <joe@...ches.com>
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> ---
> drivers/media/usb/uvc/uvc_driver.c | 57 +++++++++++-------------------
> drivers/media/usb/uvc/uvcvideo.h | 6 ++++
> 2 files changed, 27 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index 4379916a6ac1..e49491250e87 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -1593,8 +1593,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
> {
> switch (UVC_ENTITY_TYPE(entity)) {
> case UVC_VC_EXTENSION_UNIT:
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" <- XU %d", entity->id);
> + uvc_trace_cont(UVC_TRACE_PROBE, " <- XU %d", entity->id);
>
> if (entity->bNrInPins != 1) {
> uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
> @@ -1605,8 +1604,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
> break;
>
> case UVC_VC_PROCESSING_UNIT:
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" <- PU %d", entity->id);
> + uvc_trace_cont(UVC_TRACE_PROBE, " <- PU %d", entity->id);
>
> if (chain->processing != NULL) {
> uvc_trace(UVC_TRACE_DESCR, "Found multiple "
> @@ -1618,8 +1616,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
> break;
>
> case UVC_VC_SELECTOR_UNIT:
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" <- SU %d", entity->id);
> + uvc_trace_cont(UVC_TRACE_PROBE, " <- SU %d", entity->id);
>
> /* Single-input selector units are ignored. */
> if (entity->bNrInPins == 1)
> @@ -1637,27 +1634,22 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
> case UVC_ITT_VENDOR_SPECIFIC:
> case UVC_ITT_CAMERA:
> case UVC_ITT_MEDIA_TRANSPORT_INPUT:
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" <- IT %d\n", entity->id);
> + uvc_trace_cont(UVC_TRACE_PROBE, " <- IT %d\n", entity->id);
>
> break;
>
> case UVC_OTT_VENDOR_SPECIFIC:
> case UVC_OTT_DISPLAY:
> case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" OT %d", entity->id);
> + uvc_trace_cont(UVC_TRACE_PROBE, " OT %d", entity->id);
>
> break;
>
> case UVC_TT_STREAMING:
> - if (UVC_ENTITY_IS_ITERM(entity)) {
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" <- IT %d\n", entity->id);
> - } else {
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" OT %d", entity->id);
> - }
> + if (UVC_ENTITY_IS_ITERM(entity))
> + uvc_trace_cont(UVC_TRACE_PROBE, " <- IT %d\n", entity->id);
> + else
> + uvc_trace_cont(UVC_TRACE_PROBE, " OT %d", entity->id);
>
> break;
>
> @@ -1704,13 +1696,11 @@ static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
> }
>
> list_add_tail(&forward->chain, &chain->entities);
> - if (uvc_trace_param & UVC_TRACE_PROBE) {
> - if (!found)
> - pr_cont(" (->");
> + if (!found)
> + uvc_trace_cont(UVC_TRACE_PROBE, " (->");
>
> - pr_cont(" XU %d", forward->id);
> - found = 1;
> - }
> + uvc_trace_cont(UVC_TRACE_PROBE, " XU %d", forward->id);
> + found = 1;
> break;
>
> case UVC_OTT_VENDOR_SPECIFIC:
> @@ -1724,18 +1714,16 @@ static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
> }
>
> list_add_tail(&forward->chain, &chain->entities);
> - if (uvc_trace_param & UVC_TRACE_PROBE) {
> - if (!found)
> - pr_cont(" (->");
> + if (!found)
> + uvc_trace_cont(UVC_TRACE_PROBE, " (->");
>
> - pr_cont(" OT %d", forward->id);
> - found = 1;
> - }
> + uvc_trace_cont(UVC_TRACE_PROBE, " OT %d", forward->id);
> + found = 1;
> break;
> }
> }
> if (found)
> - pr_cont(")");
> + uvc_trace_cont(UVC_TRACE_PROBE, ")");
>
> return 0;
> }
> @@ -1760,8 +1748,7 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
> break;
> }
>
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" <- IT");
> + uvc_trace_cont(UVC_TRACE_PROBE, " <- IT");
>
> chain->selector = entity;
> for (i = 0; i < entity->bNrInPins; ++i) {
> @@ -1781,15 +1768,13 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
> return -EINVAL;
> }
>
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont(" %d", term->id);
> + uvc_trace_cont(UVC_TRACE_PROBE, " %d", term->id);
>
> list_add_tail(&term->chain, &chain->entities);
> uvc_scan_chain_forward(chain, term, entity);
> }
>
> - if (uvc_trace_param & UVC_TRACE_PROBE)
> - pr_cont("\n");
> + uvc_trace_cont(UVC_TRACE_PROBE, "\n");
>
> id = 0;
> break;
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index d8e2f27bf576..2b5ba4b02d3a 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -748,6 +748,12 @@ do { \
> printk(KERN_DEBUG "uvcvideo: " fmt, ##__VA_ARGS__); \
> } while (0)
>
> +#define uvc_trace_cont(flag, fmt, ...) \
> +do { \
> + if (uvc_trace_param & flag) \
> + pr_cont(fmt, ##__VA_ARGS__); \
> +} while (0)
> +
> #define uvc_warn_once(_dev, warn, fmt, ...) \
> do { \
> if (!test_and_set_bit(warn, &(_dev)->warnings)) \
--
Regards,
Laurent Pinchart
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