From patchwork Fri Sep 9 22:13:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 12972316 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D3C95C6FA8E for ; Fri, 9 Sep 2022 22:13:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231719AbiIIWNs (ORCPT ); Fri, 9 Sep 2022 18:13:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43216 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231220AbiIIWNp (ORCPT ); Fri, 9 Sep 2022 18:13:45 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9344A90C40 for ; Fri, 9 Sep 2022 15:13:41 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oWmFn-000178-91; Sat, 10 Sep 2022 00:13:39 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1oWmFk-004tr0-GB; Sat, 10 Sep 2022 00:13:38 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oWmFl-0005tR-3T; Sat, 10 Sep 2022 00:13:37 +0200 From: Michael Grzeschik To: linux-usb@vger.kernel.org Cc: linux-media@vger.kernel.org, balbi@kernel.org, laurent.pinchart@ideasonboard.com, paul.elder@ideasonboard.com, kernel@pengutronix.de, nicolas@ndufresne.ca, kieran.bingham@ideasonboard.com, Daniel Scally Subject: [PATCH v2 1/4] media: v4l: move helper functions for fractions from uvc to v4l2-common Date: Sat, 10 Sep 2022 00:13:32 +0200 Message-Id: <20220909221335.15033-2-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220909221335.15033-1-m.grzeschik@pengutronix.de> References: <20220909221335.15033-1-m.grzeschik@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The functions uvc_simplify_fraction and uvc_fraction_to_interval are generic helpers which are also useful for other v4l2 drivers. This patch moves them to v4l2-common. Reviewed-by: Daniel Scally Tested-by: Daniel Scally Signed-off-by: Michael Grzeschik --- v13 -> v1: - added Reviewed-by and Tested-by from Dan - moved to this smaller patch series v1 -> v2: - drivers/media/usb/uvc/uvc_driver.c | 84 -------------------------- drivers/media/usb/uvc/uvc_v4l2.c | 14 ++--- drivers/media/usb/uvc/uvcvideo.h | 3 - drivers/media/v4l2-core/v4l2-common.c | 86 +++++++++++++++++++++++++++ include/media/v4l2-common.h | 4 ++ 5 files changed, 97 insertions(+), 94 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 9c05776f11d1f0..0f14dee4b6d794 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -329,90 +329,6 @@ 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 - * 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 - * continued fraction decomposition. Using 8 and 333 for n_terms and threshold - * respectively seems to give nice results. - */ -void uvc_simplify_fraction(u32 *numerator, u32 *denominator, - unsigned int n_terms, unsigned int threshold) -{ - u32 *an; - u32 x, y, r; - unsigned int i, n; - - an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL); - if (an == NULL) - return; - - /* - * Convert the fraction to a simple continued fraction. See - * https://en.wikipedia.org/wiki/Continued_fraction - * Stop if the current term is bigger than or equal to the given - * threshold. - */ - x = *numerator; - y = *denominator; - - for (n = 0; n < n_terms && y != 0; ++n) { - an[n] = x / y; - if (an[n] >= threshold) { - if (n < 2) - n++; - break; - } - - r = x - an[n] * y; - x = y; - y = r; - } - - /* Expand the simple continued fraction back to an integer fraction. */ - x = 0; - y = 1; - - for (i = n; i > 0; --i) { - r = y; - y = an[i-1] * y + x; - x = r; - } - - *numerator = y; - *denominator = x; - kfree(an); -} - -/* - * 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. - */ -u32 uvc_fraction_to_interval(u32 numerator, u32 denominator) -{ - u32 multiplier; - - /* Saturate the result if the operation would overflow. */ - if (denominator == 0 || - numerator/denominator >= ((u32)-1)/10000000) - return (u32)-1; - - /* - * 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. - */ - multiplier = 10000000; - while (numerator > ((u32)-1)/multiplier) { - multiplier /= 2; - denominator /= 2; - } - - return denominator ? numerator * multiplier / denominator : 0; -} - /* ------------------------------------------------------------------------ * Terminal and unit management */ diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index 4cc3fa6b8c9812..f4d4c33b6dfbd7 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -386,7 +386,7 @@ static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, mutex_unlock(&stream->mutex); denominator = 10000000; - uvc_simplify_fraction(&numerator, &denominator, 8, 333); + v4l2_simplify_fraction(&numerator, &denominator, 8, 333); memset(parm, 0, sizeof(*parm)); parm->type = stream->type; @@ -427,7 +427,7 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, else timeperframe = parm->parm.output.timeperframe; - interval = uvc_fraction_to_interval(timeperframe.numerator, + interval = v4l2_fraction_to_interval(timeperframe.numerator, timeperframe.denominator); uvc_dbg(stream->dev, FORMAT, "Setting frame interval to %u/%u (%u)\n", timeperframe.numerator, timeperframe.denominator, interval); @@ -481,7 +481,7 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, /* Return the actual frame period. */ timeperframe.numerator = probe.dwFrameInterval; timeperframe.denominator = 10000000; - uvc_simplify_fraction(&timeperframe.numerator, + v4l2_simplify_fraction(&timeperframe.numerator, &timeperframe.denominator, 8, 333); if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { @@ -1275,7 +1275,7 @@ static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh, fival->discrete.numerator = frame->dwFrameInterval[index]; fival->discrete.denominator = 10000000; - uvc_simplify_fraction(&fival->discrete.numerator, + v4l2_simplify_fraction(&fival->discrete.numerator, &fival->discrete.denominator, 8, 333); } else { fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; @@ -1285,11 +1285,11 @@ static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh, fival->stepwise.max.denominator = 10000000; fival->stepwise.step.numerator = frame->dwFrameInterval[2]; fival->stepwise.step.denominator = 10000000; - uvc_simplify_fraction(&fival->stepwise.min.numerator, + v4l2_simplify_fraction(&fival->stepwise.min.numerator, &fival->stepwise.min.denominator, 8, 333); - uvc_simplify_fraction(&fival->stepwise.max.numerator, + v4l2_simplify_fraction(&fival->stepwise.max.numerator, &fival->stepwise.max.denominator, 8, 333); - uvc_simplify_fraction(&fival->stepwise.step.numerator, + v4l2_simplify_fraction(&fival->stepwise.step.numerator, &fival->stepwise.step.denominator, 8, 333); } diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 24c911aeebce56..ff710bdd38b3fd 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -911,9 +911,6 @@ int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control_query *xqry); /* Utility functions */ -void uvc_simplify_fraction(u32 *numerator, u32 *denominator, - unsigned int n_terms, unsigned int threshold); -u32 uvc_fraction_to_interval(u32 numerator, u32 denominator); struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, u8 epaddr); u16 uvc_endpoint_max_bpi(struct usb_device *dev, struct usb_host_endpoint *ep); diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c index e0fbe6ba4b6c49..40f56e044640d7 100644 --- a/drivers/media/v4l2-core/v4l2-common.c +++ b/drivers/media/v4l2-core/v4l2-common.c @@ -484,3 +484,89 @@ s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul, return freq > 0 ? freq : -EINVAL; } EXPORT_SYMBOL_GPL(v4l2_get_link_freq); + +/* + * 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 + * continued fraction decomposition. Using 8 and 333 for n_terms and threshold + * respectively seems to give nice results. + */ +void v4l2_simplify_fraction(u32 *numerator, u32 *denominator, + unsigned int n_terms, unsigned int threshold) +{ + u32 *an; + u32 x, y, r; + unsigned int i, n; + + an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL); + if (an == NULL) + return; + + /* + * Convert the fraction to a simple continued fraction. See + * https://en.wikipedia.org/wiki/Continued_fraction + * Stop if the current term is bigger than or equal to the given + * threshold. + */ + x = *numerator; + y = *denominator; + + for (n = 0; n < n_terms && y != 0; ++n) { + an[n] = x / y; + if (an[n] >= threshold) { + if (n < 2) + n++; + break; + } + + r = x - an[n] * y; + x = y; + y = r; + } + + /* Expand the simple continued fraction back to an integer fraction. */ + x = 0; + y = 1; + + for (i = n; i > 0; --i) { + r = y; + y = an[i-1] * y + x; + x = r; + } + + *numerator = y; + *denominator = x; + kfree(an); +} +EXPORT_SYMBOL_GPL(v4l2_simplify_fraction); + +/* + * 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. + */ +u32 v4l2_fraction_to_interval(u32 numerator, u32 denominator) +{ + u32 multiplier; + + /* Saturate the result if the operation would overflow. */ + if (denominator == 0 || + numerator/denominator >= ((u32)-1)/10000000) + return (u32)-1; + + /* + * 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. + */ + multiplier = 10000000; + while (numerator > ((u32)-1)/multiplier) { + multiplier /= 2; + denominator /= 2; + } + + return denominator ? numerator * multiplier / denominator : 0; +} +EXPORT_SYMBOL_GPL(v4l2_fraction_to_interval); diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index b708d63995f458..725ff91b26e063 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -540,6 +540,10 @@ int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat, s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul, unsigned int div); +void v4l2_simplify_fraction(u32 *numerator, u32 *denominator, + unsigned int n_terms, unsigned int threshold); +u32 v4l2_fraction_to_interval(u32 numerator, u32 denominator); + static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf) { /* From patchwork Fri Sep 9 22:13:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 12972317 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBB28ECAAA1 for ; Fri, 9 Sep 2022 22:13:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231737AbiIIWNt (ORCPT ); Fri, 9 Sep 2022 18:13:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231316AbiIIWNp (ORCPT ); Fri, 9 Sep 2022 18:13:45 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88A9C8E4F4 for ; Fri, 9 Sep 2022 15:13:41 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oWmFn-000177-91; Sat, 10 Sep 2022 00:13:39 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1oWmFk-004tqv-Cr; Sat, 10 Sep 2022 00:13:38 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oWmFl-0005tU-4E; Sat, 10 Sep 2022 00:13:37 +0200 From: Michael Grzeschik To: linux-usb@vger.kernel.org Cc: linux-media@vger.kernel.org, balbi@kernel.org, laurent.pinchart@ideasonboard.com, paul.elder@ideasonboard.com, kernel@pengutronix.de, nicolas@ndufresne.ca, kieran.bingham@ideasonboard.com, Daniel Scally Subject: [PATCH v2 2/4] media: uvcvideo: move uvc_format_desc to common header Date: Sat, 10 Sep 2022 00:13:33 +0200 Message-Id: <20220909221335.15033-3-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220909221335.15033-1-m.grzeschik@pengutronix.de> References: <20220909221335.15033-1-m.grzeschik@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The uvc_format_desc, GUID defines and the uvc_format_by_guid helper is also useful for the uvc gadget stack. This patch moves them to a common header. Reviewed-by: Daniel Scally Tested-by: Daniel Scally Signed-off-by: Michael Grzeschik --- v13 -> v1: - added Reviewed-by and Tested-by from Dan - moved to this smaller patch series v1 -> v2: - drivers/media/usb/uvc/uvc_ctrl.c | 1 + drivers/media/usb/uvc/uvc_driver.c | 206 +---------------- drivers/media/usb/uvc/uvcvideo.h | 144 ------------ include/media/v4l2-uvc.h | 359 +++++++++++++++++++++++++++++ 4 files changed, 361 insertions(+), 349 deletions(-) create mode 100644 include/media/v4l2-uvc.h diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index 8c208db9600b46..b8a00a51679f6d 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -18,6 +18,7 @@ #include #include #include +#include #include "uvcvideo.h" diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 0f14dee4b6d794..2891bc9d319280 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -20,6 +20,7 @@ #include #include +#include #include "uvcvideo.h" @@ -34,198 +35,6 @@ static unsigned int uvc_quirks_param = -1; unsigned int uvc_dbg_param; unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; -/* ------------------------------------------------------------------------ - * Video formats - */ - -static struct uvc_format_desc uvc_fmts[] = { - { - .name = "YUV 4:2:2 (YUYV)", - .guid = UVC_GUID_FORMAT_YUY2, - .fcc = V4L2_PIX_FMT_YUYV, - }, - { - .name = "YUV 4:2:2 (YUYV)", - .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, - .fcc = V4L2_PIX_FMT_YUYV, - }, - { - .name = "YUV 4:2:0 (NV12)", - .guid = UVC_GUID_FORMAT_NV12, - .fcc = V4L2_PIX_FMT_NV12, - }, - { - .name = "MJPEG", - .guid = UVC_GUID_FORMAT_MJPEG, - .fcc = V4L2_PIX_FMT_MJPEG, - }, - { - .name = "YVU 4:2:0 (YV12)", - .guid = UVC_GUID_FORMAT_YV12, - .fcc = V4L2_PIX_FMT_YVU420, - }, - { - .name = "YUV 4:2:0 (I420)", - .guid = UVC_GUID_FORMAT_I420, - .fcc = V4L2_PIX_FMT_YUV420, - }, - { - .name = "YUV 4:2:0 (M420)", - .guid = UVC_GUID_FORMAT_M420, - .fcc = V4L2_PIX_FMT_M420, - }, - { - .name = "YUV 4:2:2 (UYVY)", - .guid = UVC_GUID_FORMAT_UYVY, - .fcc = V4L2_PIX_FMT_UYVY, - }, - { - .name = "Greyscale 8-bit (Y800)", - .guid = UVC_GUID_FORMAT_Y800, - .fcc = V4L2_PIX_FMT_GREY, - }, - { - .name = "Greyscale 8-bit (Y8 )", - .guid = UVC_GUID_FORMAT_Y8, - .fcc = V4L2_PIX_FMT_GREY, - }, - { - .name = "Greyscale 8-bit (D3DFMT_L8)", - .guid = UVC_GUID_FORMAT_D3DFMT_L8, - .fcc = V4L2_PIX_FMT_GREY, - }, - { - .name = "IR 8-bit (L8_IR)", - .guid = UVC_GUID_FORMAT_KSMEDIA_L8_IR, - .fcc = V4L2_PIX_FMT_GREY, - }, - { - .name = "Greyscale 10-bit (Y10 )", - .guid = UVC_GUID_FORMAT_Y10, - .fcc = V4L2_PIX_FMT_Y10, - }, - { - .name = "Greyscale 12-bit (Y12 )", - .guid = UVC_GUID_FORMAT_Y12, - .fcc = V4L2_PIX_FMT_Y12, - }, - { - .name = "Greyscale 16-bit (Y16 )", - .guid = UVC_GUID_FORMAT_Y16, - .fcc = V4L2_PIX_FMT_Y16, - }, - { - .name = "BGGR Bayer (BY8 )", - .guid = UVC_GUID_FORMAT_BY8, - .fcc = V4L2_PIX_FMT_SBGGR8, - }, - { - .name = "BGGR Bayer (BA81)", - .guid = UVC_GUID_FORMAT_BA81, - .fcc = V4L2_PIX_FMT_SBGGR8, - }, - { - .name = "GBRG Bayer (GBRG)", - .guid = UVC_GUID_FORMAT_GBRG, - .fcc = V4L2_PIX_FMT_SGBRG8, - }, - { - .name = "GRBG Bayer (GRBG)", - .guid = UVC_GUID_FORMAT_GRBG, - .fcc = V4L2_PIX_FMT_SGRBG8, - }, - { - .name = "RGGB Bayer (RGGB)", - .guid = UVC_GUID_FORMAT_RGGB, - .fcc = V4L2_PIX_FMT_SRGGB8, - }, - { - .name = "RGB565", - .guid = UVC_GUID_FORMAT_RGBP, - .fcc = V4L2_PIX_FMT_RGB565, - }, - { - .name = "BGR 8:8:8 (BGR3)", - .guid = UVC_GUID_FORMAT_BGR3, - .fcc = V4L2_PIX_FMT_BGR24, - }, - { - .name = "H.264", - .guid = UVC_GUID_FORMAT_H264, - .fcc = V4L2_PIX_FMT_H264, - }, - { - .name = "H.265", - .guid = UVC_GUID_FORMAT_H265, - .fcc = V4L2_PIX_FMT_HEVC, - }, - { - .name = "Greyscale 8 L/R (Y8I)", - .guid = UVC_GUID_FORMAT_Y8I, - .fcc = V4L2_PIX_FMT_Y8I, - }, - { - .name = "Greyscale 12 L/R (Y12I)", - .guid = UVC_GUID_FORMAT_Y12I, - .fcc = V4L2_PIX_FMT_Y12I, - }, - { - .name = "Depth data 16-bit (Z16)", - .guid = UVC_GUID_FORMAT_Z16, - .fcc = V4L2_PIX_FMT_Z16, - }, - { - .name = "Bayer 10-bit (SRGGB10P)", - .guid = UVC_GUID_FORMAT_RW10, - .fcc = V4L2_PIX_FMT_SRGGB10P, - }, - { - .name = "Bayer 16-bit (SBGGR16)", - .guid = UVC_GUID_FORMAT_BG16, - .fcc = V4L2_PIX_FMT_SBGGR16, - }, - { - .name = "Bayer 16-bit (SGBRG16)", - .guid = UVC_GUID_FORMAT_GB16, - .fcc = V4L2_PIX_FMT_SGBRG16, - }, - { - .name = "Bayer 16-bit (SRGGB16)", - .guid = UVC_GUID_FORMAT_RG16, - .fcc = V4L2_PIX_FMT_SRGGB16, - }, - { - .name = "Bayer 16-bit (SGRBG16)", - .guid = UVC_GUID_FORMAT_GR16, - .fcc = V4L2_PIX_FMT_SGRBG16, - }, - { - .name = "Depth data 16-bit (Z16)", - .guid = UVC_GUID_FORMAT_INVZ, - .fcc = V4L2_PIX_FMT_Z16, - }, - { - .name = "Greyscale 10-bit (Y10 )", - .guid = UVC_GUID_FORMAT_INVI, - .fcc = V4L2_PIX_FMT_Y10, - }, - { - .name = "IR:Depth 26-bit (INZI)", - .guid = UVC_GUID_FORMAT_INZI, - .fcc = V4L2_PIX_FMT_INZI, - }, - { - .name = "4-bit Depth Confidence (Packed)", - .guid = UVC_GUID_FORMAT_CNF4, - .fcc = V4L2_PIX_FMT_CNF4, - }, - { - .name = "HEVC", - .guid = UVC_GUID_FORMAT_HEVC, - .fcc = V4L2_PIX_FMT_HEVC, - }, -}; - /* ------------------------------------------------------------------------ * Utility functions */ @@ -245,19 +54,6 @@ struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, return NULL; } -static struct uvc_format_desc *uvc_format_by_guid(const u8 guid[16]) -{ - unsigned int len = ARRAY_SIZE(uvc_fmts); - unsigned int i; - - for (i = 0; i < len; ++i) { - if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) - return &uvc_fmts[i]; - } - - return NULL; -} - static enum v4l2_colorspace uvc_colorspace(const u8 primaries) { static const enum v4l2_colorspace colorprimaries[] = { diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index ff710bdd38b3fd..df93db259312e7 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -41,144 +41,6 @@ #define UVC_EXT_GPIO_UNIT 0x7ffe #define UVC_EXT_GPIO_UNIT_ID 0x100 -/* ------------------------------------------------------------------------ - * GUIDs - */ -#define UVC_GUID_UVC_CAMERA \ - {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01} -#define UVC_GUID_UVC_OUTPUT \ - {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02} -#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \ - {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03} -#define UVC_GUID_UVC_PROCESSING \ - {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01} -#define UVC_GUID_UVC_SELECTOR \ - {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02} -#define UVC_GUID_EXT_GPIO_CONTROLLER \ - {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03} - -#define UVC_GUID_FORMAT_MJPEG \ - { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_YUY2 \ - { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_YUY2_ISIGHT \ - { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_NV12 \ - { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_YV12 \ - { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_I420 \ - { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_UYVY \ - { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_Y800 \ - { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_Y8 \ - { 'Y', '8', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_Y10 \ - { 'Y', '1', '0', ' ', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_Y12 \ - { 'Y', '1', '2', ' ', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_Y16 \ - { 'Y', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_BY8 \ - { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_BA81 \ - { 'B', 'A', '8', '1', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_GBRG \ - { 'G', 'B', 'R', 'G', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_GRBG \ - { 'G', 'R', 'B', 'G', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_RGGB \ - { 'R', 'G', 'G', 'B', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_BG16 \ - { 'B', 'G', '1', '6', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_GB16 \ - { 'G', 'B', '1', '6', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_RG16 \ - { 'R', 'G', '1', '6', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_GR16 \ - { 'G', 'R', '1', '6', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_RGBP \ - { 'R', 'G', 'B', 'P', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_BGR3 \ - { 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \ - 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70} -#define UVC_GUID_FORMAT_M420 \ - { 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} - -#define UVC_GUID_FORMAT_H264 \ - { 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_H265 \ - { 'H', '2', '6', '5', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_Y8I \ - { 'Y', '8', 'I', ' ', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_Y12I \ - { 'Y', '1', '2', 'I', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_Z16 \ - { 'Z', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_RW10 \ - { 'R', 'W', '1', '0', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_INVZ \ - { 'I', 'N', 'V', 'Z', 0x90, 0x2d, 0x58, 0x4a, \ - 0x92, 0x0b, 0x77, 0x3f, 0x1f, 0x2c, 0x55, 0x6b} -#define UVC_GUID_FORMAT_INZI \ - { 'I', 'N', 'Z', 'I', 0x66, 0x1a, 0x42, 0xa2, \ - 0x90, 0x65, 0xd0, 0x18, 0x14, 0xa8, 0xef, 0x8a} -#define UVC_GUID_FORMAT_INVI \ - { 'I', 'N', 'V', 'I', 0xdb, 0x57, 0x49, 0x5e, \ - 0x8e, 0x3f, 0xf4, 0x79, 0x53, 0x2b, 0x94, 0x6f} -#define UVC_GUID_FORMAT_CNF4 \ - { 'C', ' ', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} - -#define UVC_GUID_FORMAT_D3DFMT_L8 \ - {0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} -#define UVC_GUID_FORMAT_KSMEDIA_L8_IR \ - {0x32, 0x00, 0x00, 0x00, 0x02, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} - -#define UVC_GUID_FORMAT_HEVC \ - { 'H', 'E', 'V', 'C', 0x00, 0x00, 0x10, 0x00, \ - 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} - - /* ------------------------------------------------------------------------ * Driver specific constants. */ @@ -283,12 +145,6 @@ struct uvc_control { struct uvc_fh *handle; /* File handle that last changed the control. */ }; -struct uvc_format_desc { - char *name; - u8 guid[16]; - u32 fcc; -}; - /* * The term 'entity' refers to both UVC units and UVC terminals. * diff --git a/include/media/v4l2-uvc.h b/include/media/v4l2-uvc.h new file mode 100644 index 00000000000000..f83e31661333bb --- /dev/null +++ b/include/media/v4l2-uvc.h @@ -0,0 +1,359 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * v4l2 uvc internal API header + * + * Some commonly needed functions for uvc drivers + */ + +#ifndef __LINUX_V4L2_UVC_H +#define __LINUX_V4L2_UVC_H + +/* ------------------------------------------------------------------------ + * GUIDs + */ +#define UVC_GUID_UVC_CAMERA \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01} +#define UVC_GUID_UVC_OUTPUT \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02} +#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03} +#define UVC_GUID_UVC_PROCESSING \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01} +#define UVC_GUID_UVC_SELECTOR \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02} +#define UVC_GUID_EXT_GPIO_CONTROLLER \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03} + +#define UVC_GUID_FORMAT_MJPEG \ + { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_YUY2 \ + { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_YUY2_ISIGHT \ + { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_NV12 \ + { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_YV12 \ + { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_I420 \ + { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_UYVY \ + { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Y800 \ + { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Y8 \ + { 'Y', '8', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Y10 \ + { 'Y', '1', '0', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Y12 \ + { 'Y', '1', '2', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Y16 \ + { 'Y', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_BY8 \ + { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_BA81 \ + { 'B', 'A', '8', '1', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_GBRG \ + { 'G', 'B', 'R', 'G', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_GRBG \ + { 'G', 'R', 'B', 'G', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_RGGB \ + { 'R', 'G', 'G', 'B', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_BG16 \ + { 'B', 'G', '1', '6', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_GB16 \ + { 'G', 'B', '1', '6', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_RG16 \ + { 'R', 'G', '1', '6', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_GR16 \ + { 'G', 'R', '1', '6', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_RGBP \ + { 'R', 'G', 'B', 'P', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_BGR3 \ + { 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \ + 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70} +#define UVC_GUID_FORMAT_M420 \ + { 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} + +#define UVC_GUID_FORMAT_H264 \ + { 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_H265 \ + { 'H', '2', '6', '5', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Y8I \ + { 'Y', '8', 'I', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Y12I \ + { 'Y', '1', '2', 'I', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Z16 \ + { 'Z', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_RW10 \ + { 'R', 'W', '1', '0', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_INVZ \ + { 'I', 'N', 'V', 'Z', 0x90, 0x2d, 0x58, 0x4a, \ + 0x92, 0x0b, 0x77, 0x3f, 0x1f, 0x2c, 0x55, 0x6b} +#define UVC_GUID_FORMAT_INZI \ + { 'I', 'N', 'Z', 'I', 0x66, 0x1a, 0x42, 0xa2, \ + 0x90, 0x65, 0xd0, 0x18, 0x14, 0xa8, 0xef, 0x8a} +#define UVC_GUID_FORMAT_INVI \ + { 'I', 'N', 'V', 'I', 0xdb, 0x57, 0x49, 0x5e, \ + 0x8e, 0x3f, 0xf4, 0x79, 0x53, 0x2b, 0x94, 0x6f} +#define UVC_GUID_FORMAT_CNF4 \ + { 'C', ' ', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} + +#define UVC_GUID_FORMAT_D3DFMT_L8 \ + {0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_KSMEDIA_L8_IR \ + {0x32, 0x00, 0x00, 0x00, 0x02, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} + +#define UVC_GUID_FORMAT_HEVC \ + { 'H', 'E', 'V', 'C', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} + +/* ------------------------------------------------------------------------ + * Video formats + */ + +struct uvc_format_desc { + char *name; + u8 guid[16]; + u32 fcc; +}; + +static struct uvc_format_desc uvc_fmts[] = { + { + .name = "YUV 4:2:2 (YUYV)", + .guid = UVC_GUID_FORMAT_YUY2, + .fcc = V4L2_PIX_FMT_YUYV, + }, + { + .name = "YUV 4:2:2 (YUYV)", + .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, + .fcc = V4L2_PIX_FMT_YUYV, + }, + { + .name = "YUV 4:2:0 (NV12)", + .guid = UVC_GUID_FORMAT_NV12, + .fcc = V4L2_PIX_FMT_NV12, + }, + { + .name = "MJPEG", + .guid = UVC_GUID_FORMAT_MJPEG, + .fcc = V4L2_PIX_FMT_MJPEG, + }, + { + .name = "YVU 4:2:0 (YV12)", + .guid = UVC_GUID_FORMAT_YV12, + .fcc = V4L2_PIX_FMT_YVU420, + }, + { + .name = "YUV 4:2:0 (I420)", + .guid = UVC_GUID_FORMAT_I420, + .fcc = V4L2_PIX_FMT_YUV420, + }, + { + .name = "YUV 4:2:0 (M420)", + .guid = UVC_GUID_FORMAT_M420, + .fcc = V4L2_PIX_FMT_M420, + }, + { + .name = "YUV 4:2:2 (UYVY)", + .guid = UVC_GUID_FORMAT_UYVY, + .fcc = V4L2_PIX_FMT_UYVY, + }, + { + .name = "Greyscale 8-bit (Y800)", + .guid = UVC_GUID_FORMAT_Y800, + .fcc = V4L2_PIX_FMT_GREY, + }, + { + .name = "Greyscale 8-bit (Y8 )", + .guid = UVC_GUID_FORMAT_Y8, + .fcc = V4L2_PIX_FMT_GREY, + }, + { + .name = "Greyscale 8-bit (D3DFMT_L8)", + .guid = UVC_GUID_FORMAT_D3DFMT_L8, + .fcc = V4L2_PIX_FMT_GREY, + }, + { + .name = "IR 8-bit (L8_IR)", + .guid = UVC_GUID_FORMAT_KSMEDIA_L8_IR, + .fcc = V4L2_PIX_FMT_GREY, + }, + { + .name = "Greyscale 10-bit (Y10 )", + .guid = UVC_GUID_FORMAT_Y10, + .fcc = V4L2_PIX_FMT_Y10, + }, + { + .name = "Greyscale 12-bit (Y12 )", + .guid = UVC_GUID_FORMAT_Y12, + .fcc = V4L2_PIX_FMT_Y12, + }, + { + .name = "Greyscale 16-bit (Y16 )", + .guid = UVC_GUID_FORMAT_Y16, + .fcc = V4L2_PIX_FMT_Y16, + }, + { + .name = "BGGR Bayer (BY8 )", + .guid = UVC_GUID_FORMAT_BY8, + .fcc = V4L2_PIX_FMT_SBGGR8, + }, + { + .name = "BGGR Bayer (BA81)", + .guid = UVC_GUID_FORMAT_BA81, + .fcc = V4L2_PIX_FMT_SBGGR8, + }, + { + .name = "GBRG Bayer (GBRG)", + .guid = UVC_GUID_FORMAT_GBRG, + .fcc = V4L2_PIX_FMT_SGBRG8, + }, + { + .name = "GRBG Bayer (GRBG)", + .guid = UVC_GUID_FORMAT_GRBG, + .fcc = V4L2_PIX_FMT_SGRBG8, + }, + { + .name = "RGGB Bayer (RGGB)", + .guid = UVC_GUID_FORMAT_RGGB, + .fcc = V4L2_PIX_FMT_SRGGB8, + }, + { + .name = "RGB565", + .guid = UVC_GUID_FORMAT_RGBP, + .fcc = V4L2_PIX_FMT_RGB565, + }, + { + .name = "BGR 8:8:8 (BGR3)", + .guid = UVC_GUID_FORMAT_BGR3, + .fcc = V4L2_PIX_FMT_BGR24, + }, + { + .name = "H.264", + .guid = UVC_GUID_FORMAT_H264, + .fcc = V4L2_PIX_FMT_H264, + }, + { + .name = "H.265", + .guid = UVC_GUID_FORMAT_H265, + .fcc = V4L2_PIX_FMT_HEVC, + }, + { + .name = "Greyscale 8 L/R (Y8I)", + .guid = UVC_GUID_FORMAT_Y8I, + .fcc = V4L2_PIX_FMT_Y8I, + }, + { + .name = "Greyscale 12 L/R (Y12I)", + .guid = UVC_GUID_FORMAT_Y12I, + .fcc = V4L2_PIX_FMT_Y12I, + }, + { + .name = "Depth data 16-bit (Z16)", + .guid = UVC_GUID_FORMAT_Z16, + .fcc = V4L2_PIX_FMT_Z16, + }, + { + .name = "Bayer 10-bit (SRGGB10P)", + .guid = UVC_GUID_FORMAT_RW10, + .fcc = V4L2_PIX_FMT_SRGGB10P, + }, + { + .name = "Bayer 16-bit (SBGGR16)", + .guid = UVC_GUID_FORMAT_BG16, + .fcc = V4L2_PIX_FMT_SBGGR16, + }, + { + .name = "Bayer 16-bit (SGBRG16)", + .guid = UVC_GUID_FORMAT_GB16, + .fcc = V4L2_PIX_FMT_SGBRG16, + }, + { + .name = "Bayer 16-bit (SRGGB16)", + .guid = UVC_GUID_FORMAT_RG16, + .fcc = V4L2_PIX_FMT_SRGGB16, + }, + { + .name = "Bayer 16-bit (SGRBG16)", + .guid = UVC_GUID_FORMAT_GR16, + .fcc = V4L2_PIX_FMT_SGRBG16, + }, + { + .name = "Depth data 16-bit (Z16)", + .guid = UVC_GUID_FORMAT_INVZ, + .fcc = V4L2_PIX_FMT_Z16, + }, + { + .name = "Greyscale 10-bit (Y10 )", + .guid = UVC_GUID_FORMAT_INVI, + .fcc = V4L2_PIX_FMT_Y10, + }, + { + .name = "IR:Depth 26-bit (INZI)", + .guid = UVC_GUID_FORMAT_INZI, + .fcc = V4L2_PIX_FMT_INZI, + }, + { + .name = "4-bit Depth Confidence (Packed)", + .guid = UVC_GUID_FORMAT_CNF4, + .fcc = V4L2_PIX_FMT_CNF4, + }, + { + .name = "HEVC", + .guid = UVC_GUID_FORMAT_HEVC, + .fcc = V4L2_PIX_FMT_HEVC, + }, +}; + +static inline struct uvc_format_desc *uvc_format_by_guid(const u8 guid[16]) +{ + unsigned int len = ARRAY_SIZE(uvc_fmts); + unsigned int i; + + for (i = 0; i < len; ++i) { + if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) + return &uvc_fmts[i]; + } + + return NULL; +} + +#endif /* __LINUX_V4L2_UVC_H */ From patchwork Fri Sep 9 22:13:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 12972313 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67FD8ECAAA1 for ; Fri, 9 Sep 2022 22:13:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231297AbiIIWNp (ORCPT ); Fri, 9 Sep 2022 18:13:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43174 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229702AbiIIWNn (ORCPT ); Fri, 9 Sep 2022 18:13:43 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F4258D3C3 for ; Fri, 9 Sep 2022 15:13:41 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oWmFn-000179-94; Sat, 10 Sep 2022 00:13:39 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1oWmFk-004tr3-MW; Sat, 10 Sep 2022 00:13:38 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oWmFl-0005tW-50; Sat, 10 Sep 2022 00:13:37 +0200 From: Michael Grzeschik To: linux-usb@vger.kernel.org Cc: linux-media@vger.kernel.org, balbi@kernel.org, laurent.pinchart@ideasonboard.com, paul.elder@ideasonboard.com, kernel@pengutronix.de, nicolas@ndufresne.ca, kieran.bingham@ideasonboard.com Subject: [PATCH v2 3/4] usb: gadget: uvc: add v4l2 enumeration api calls Date: Sat, 10 Sep 2022 00:13:34 +0200 Message-Id: <20220909221335.15033-4-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220909221335.15033-1-m.grzeschik@pengutronix.de> References: <20220909221335.15033-1-m.grzeschik@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This patch adds support to the v4l2 VIDIOCs for enum_format, enum_framesizes and enum_frameintervals. This way, the userspace application can use these VIDIOCS to query the via configfs exported frame capabilities. With thes callbacks the userspace doesn't have to bring its own configfs parser. Signed-off-by: Michael Grzeschik --- v13 -> v1: - moved to this smaller patch series - improved the error handling in uvc_alloc like suggested by Dan Scally v1 -> v2: - declare all local helper functions as static drivers/usb/gadget/function/f_uvc.c | 30 +++++ drivers/usb/gadget/function/uvc.h | 2 + drivers/usb/gadget/function/uvc_v4l2.c | 176 +++++++++++++++++++++++++ 3 files changed, 208 insertions(+) diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index 09961f4ca981da..e6948cf8def30b 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -888,6 +888,7 @@ static void uvc_free(struct usb_function *f) struct uvc_device *uvc = to_uvc(f); struct f_uvc_opts *opts = container_of(f->fi, struct f_uvc_opts, func_inst); + config_item_put(&uvc->header->item); --opts->refcnt; kfree(uvc); } @@ -945,6 +946,7 @@ static struct usb_function *uvc_alloc(struct usb_function_instance *fi) struct uvc_device *uvc; struct f_uvc_opts *opts; struct uvc_descriptor_header **strm_cls; + struct config_item *streaming, *header, *h; uvc = kzalloc(sizeof(*uvc), GFP_KERNEL); if (uvc == NULL) @@ -977,6 +979,29 @@ static struct usb_function *uvc_alloc(struct usb_function_instance *fi) uvc->desc.fs_streaming = opts->fs_streaming; uvc->desc.hs_streaming = opts->hs_streaming; uvc->desc.ss_streaming = opts->ss_streaming; + + streaming = config_group_find_item(&opts->func_inst.group, "streaming"); + if (!streaming) + goto err_config; + + header = config_group_find_item(to_config_group(streaming), "header"); + config_item_put(streaming); + if (!header) + goto err_config; + + h = config_group_find_item(to_config_group(header), "h"); + config_item_put(header); + if (!h) + goto err_config; + + uvc->header = to_uvcg_streaming_header(h); + config_item_put(h); + if (!uvc->header->linked) { + mutex_unlock(&opts->lock); + kfree(uvc); + return ERR_PTR(-EBUSY); + } + ++opts->refcnt; mutex_unlock(&opts->lock); @@ -992,6 +1017,11 @@ static struct usb_function *uvc_alloc(struct usb_function_instance *fi) uvc->func.bind_deactivated = true; return &uvc->func; + +err_config: + mutex_unlock(&opts->lock); + kfree(uvc); + return ERR_PTR(-ENOENT); } DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc); diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index 1a31e6c6a5ffb8..40226b1f7e148a 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -134,6 +134,8 @@ struct uvc_device { bool func_connected; wait_queue_head_t func_connected_queue; + struct uvcg_streaming_header *header; + /* Descriptors */ struct { const struct uvc_descriptor_header * const *fs_control; diff --git a/drivers/usb/gadget/function/uvc_v4l2.c b/drivers/usb/gadget/function/uvc_v4l2.c index d6dbf9b763b2e1..417655e4a83dd7 100644 --- a/drivers/usb/gadget/function/uvc_v4l2.c +++ b/drivers/usb/gadget/function/uvc_v4l2.c @@ -18,12 +18,92 @@ #include #include #include +#include #include "f_uvc.h" #include "uvc.h" #include "uvc_queue.h" #include "uvc_video.h" #include "uvc_v4l2.h" +#include "uvc_configfs.h" + +static struct uvc_format_desc *to_uvc_format(struct uvcg_format *uformat) +{ + char guid[16] = UVC_GUID_FORMAT_MJPEG; + struct uvc_format_desc *format; + struct uvcg_uncompressed *unc; + + if (uformat->type == UVCG_UNCOMPRESSED) { + unc = to_uvcg_uncompressed(&uformat->group.cg_item); + if (!unc) + return ERR_PTR(-EINVAL); + + memcpy(guid, unc->desc.guidFormat, sizeof(guid)); + } + + format = uvc_format_by_guid(guid); + if (!format) + return ERR_PTR(-EINVAL); + + return format; +} + +static struct uvcg_format *find_format_by_index(struct uvc_device *uvc, int index) +{ + struct uvcg_format_ptr *format; + struct uvcg_format *uformat = NULL; + int i = 1; + + list_for_each_entry(format, &uvc->header->formats, entry) { + if (index == i) { + uformat = format->fmt; + break; + } + i++; + } + + return uformat; +} + +static struct uvcg_frame *find_frame_by_index(struct uvc_device *uvc, + struct uvcg_format *uformat, + int index) +{ + struct uvcg_format_ptr *format; + struct uvcg_frame_ptr *frame; + struct uvcg_frame *uframe = NULL; + + list_for_each_entry(format, &uvc->header->formats, entry) { + if (format->fmt->type != uformat->type) + continue; + list_for_each_entry(frame, &format->fmt->frames, entry) { + if (index == frame->frm->frame.b_frame_index) { + uframe = frame->frm; + break; + } + } + } + + return uframe; +} + +static struct uvcg_format *find_format_by_pix(struct uvc_device *uvc, + u32 pixelformat) +{ + struct uvcg_format_ptr *format; + struct uvcg_format *uformat = NULL; + + list_for_each_entry(format, &uvc->header->formats, entry) { + struct uvc_format_desc *fmtdesc = to_uvc_format(format->fmt); + + if (fmtdesc->fcc == pixelformat) { + uformat = format->fmt; + break; + } + } + + return uformat; +} /* -------------------------------------------------------------------------- * Requests handling @@ -134,6 +214,99 @@ uvc_v4l2_set_format(struct file *file, void *fh, struct v4l2_format *fmt) return 0; } +static int +uvc_v4l2_enum_frameintervals(struct file *file, void *fh, + struct v4l2_frmivalenum *fival) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_device *uvc = video_get_drvdata(vdev); + struct uvcg_format *uformat = NULL; + struct uvcg_frame *uframe = NULL; + struct uvcg_frame_ptr *frame; + + uformat = find_format_by_pix(uvc, fival->pixel_format); + if (!uformat) + return -EINVAL; + + list_for_each_entry(frame, &uformat->frames, entry) { + if (frame->frm->frame.w_width == fival->width && + frame->frm->frame.w_height == fival->height) { + uframe = frame->frm; + break; + } + } + if (!uframe) + return -EINVAL; + + if (fival->index >= uframe->frame.b_frame_interval_type) + return -EINVAL; + + fival->discrete.numerator = + uframe->dw_frame_interval[fival->index]; + + /* TODO: handle V4L2_FRMIVAL_TYPE_STEPWISE */ + fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; + fival->discrete.denominator = 10000000; + v4l2_simplify_fraction(&fival->discrete.numerator, + &fival->discrete.denominator, 8, 333); + + return 0; +} + +static int +uvc_v4l2_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *fsize) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_device *uvc = video_get_drvdata(vdev); + struct uvcg_format *uformat = NULL; + struct uvcg_frame *uframe = NULL; + + uformat = find_format_by_pix(uvc, fsize->pixel_format); + if (!uformat) + return -EINVAL; + + if (fsize->index >= uformat->num_frames) + return -EINVAL; + + uframe = find_frame_by_index(uvc, uformat, fsize->index + 1); + if (!uframe) + return -EINVAL; + + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + fsize->discrete.width = uframe->frame.w_width; + fsize->discrete.height = uframe->frame.w_height; + + return 0; +} + +static int +uvc_v4l2_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_device *uvc = video_get_drvdata(vdev); + struct uvc_format_desc *fmtdesc; + struct uvcg_format *uformat; + + if (f->index >= uvc->header->num_fmt) + return -EINVAL; + + uformat = find_format_by_index(uvc, f->index + 1); + if (!uformat) + return -EINVAL; + + if (uformat->type != UVCG_UNCOMPRESSED) + f->flags |= V4L2_FMT_FLAG_COMPRESSED; + + fmtdesc = to_uvc_format(uformat); + f->pixelformat = fmtdesc->fcc; + + strscpy(f->description, fmtdesc->name, sizeof(f->description)); + f->description[strlen(fmtdesc->name) - 1] = 0; + + return 0; +} + static int uvc_v4l2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *b) { @@ -300,6 +473,9 @@ const struct v4l2_ioctl_ops uvc_v4l2_ioctl_ops = { .vidioc_querycap = uvc_v4l2_querycap, .vidioc_g_fmt_vid_out = uvc_v4l2_get_format, .vidioc_s_fmt_vid_out = uvc_v4l2_set_format, + .vidioc_enum_frameintervals = uvc_v4l2_enum_frameintervals, + .vidioc_enum_framesizes = uvc_v4l2_enum_framesizes, + .vidioc_enum_fmt_vid_out = uvc_v4l2_enum_format, .vidioc_reqbufs = uvc_v4l2_reqbufs, .vidioc_querybuf = uvc_v4l2_querybuf, .vidioc_qbuf = uvc_v4l2_qbuf, From patchwork Fri Sep 9 22:13:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 12972315 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99E81ECAAD3 for ; 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Sat, 10 Sep 2022 00:13:38 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oWmFl-0005tZ-5a; Sat, 10 Sep 2022 00:13:37 +0200 From: Michael Grzeschik To: linux-usb@vger.kernel.org Cc: linux-media@vger.kernel.org, balbi@kernel.org, laurent.pinchart@ideasonboard.com, paul.elder@ideasonboard.com, kernel@pengutronix.de, nicolas@ndufresne.ca, kieran.bingham@ideasonboard.com Subject: [PATCH v2 4/4] usb: gadget: uvc: add v4l2 try_format api call Date: Sat, 10 Sep 2022 00:13:35 +0200 Message-Id: <20220909221335.15033-5-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220909221335.15033-1-m.grzeschik@pengutronix.de> References: <20220909221335.15033-1-m.grzeschik@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This patch adds the uvc_v4l2_try_format api call to validate the setting of v4l2_format. It will fallback to the nearest allowed framesize. Signed-off-by: Michael Grzeschik --- v13 -> v1: - moved to this smaller patch series v1 -> v2: - declaring all helper functions as static drivers/usb/gadget/function/uvc_v4l2.c | 110 +++++++++++++++++++++++++ 1 file changed, 110 insertions(+) diff --git a/drivers/usb/gadget/function/uvc_v4l2.c b/drivers/usb/gadget/function/uvc_v4l2.c index 417655e4a83dd7..c4ed48d6b8a407 100644 --- a/drivers/usb/gadget/function/uvc_v4l2.c +++ b/drivers/usb/gadget/function/uvc_v4l2.c @@ -48,6 +48,31 @@ static struct uvc_format_desc *to_uvc_format(struct uvcg_format *uformat) return format; } +static int uvc_v4l2_get_bytesperline(struct uvcg_format *uformat, + struct uvcg_frame *uframe) +{ + struct uvcg_uncompressed *u; + + if (uformat->type == UVCG_UNCOMPRESSED) { + u = to_uvcg_uncompressed(&uformat->group.cg_item); + if (!u) + return 0; + + return u->desc.bBitsPerPixel * uframe->frame.w_width / 8; + } + + return 0; +} + +static int uvc_get_frame_size(struct uvcg_format *uformat, + struct uvcg_frame *uframe) +{ + unsigned int bpl = uvc_v4l2_get_bytesperline(uformat, uframe); + + return bpl ? bpl * uframe->frame.w_height : + uframe->frame.dw_max_video_frame_buffer_size; +} + static struct uvcg_format *find_format_by_index(struct uvc_device *uvc, int index) { struct uvcg_format_ptr *format; @@ -105,6 +130,50 @@ static struct uvcg_format *find_format_by_pix(struct uvc_device *uvc, return uformat; } +static struct uvcg_frame *find_closest_frame_by_size(struct uvc_device *uvc, + struct uvcg_format *uformat, + u16 rw, u16 rh) +{ + struct uvc_video *video = &uvc->video; + struct uvcg_format_ptr *format; + struct uvcg_frame_ptr *frame; + struct uvcg_frame *uframe = NULL; + unsigned int d, maxd; + + /* 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. + */ + maxd = (unsigned int)-1; + + list_for_each_entry(format, &uvc->header->formats, entry) { + if (format->fmt->type != uformat->type) + continue; + + list_for_each_entry(frame, &format->fmt->frames, entry) { + u16 w, h; + + w = frame->frm->frame.w_width; + h = frame->frm->frame.w_height; + + d = min(w, rw) * min(h, rh); + d = w*h + rw*rh - 2*d; + if (d < maxd) { + maxd = d; + uframe = frame->frm; + } + + if (maxd == 0) + break; + } + } + + if (!uframe) + uvcg_dbg(&video->uvc->func, "Unsupported size %ux%u\n", rw, rh); + + return uframe; +} + /* -------------------------------------------------------------------------- * Requests handling */ @@ -214,6 +283,46 @@ uvc_v4l2_set_format(struct file *file, void *fh, struct v4l2_format *fmt) return 0; } +static int +uvc_v4l2_try_format(struct file *file, void *fh, struct v4l2_format *fmt) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_device *uvc = video_get_drvdata(vdev); + struct uvc_video *video = &uvc->video; + struct uvcg_format *uformat; + struct uvcg_frame *uframe; + u8 *fcc; + + if (fmt->type != video->queue.queue.type) + return -EINVAL; + + fcc = (u8 *)&fmt->fmt.pix.pixelformat; + uvcg_dbg(&uvc->func, "Trying format 0x%08x (%c%c%c%c): %ux%u\n", + fmt->fmt.pix.pixelformat, + fcc[0], fcc[1], fcc[2], fcc[3], + fmt->fmt.pix.width, fmt->fmt.pix.height); + + uformat = find_format_by_pix(uvc, fmt->fmt.pix.pixelformat); + if (!uformat) + return -EINVAL; + + uframe = find_closest_frame_by_size(uvc, uformat, + fmt->fmt.pix.width, fmt->fmt.pix.height); + if (!uframe) + return -EINVAL; + + fmt->fmt.pix.width = uframe->frame.w_width; + fmt->fmt.pix.height = uframe->frame.w_height; + fmt->fmt.pix.field = V4L2_FIELD_NONE; + fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(uformat, uframe); + fmt->fmt.pix.sizeimage = uvc_get_frame_size(uformat, uframe); + fmt->fmt.pix.pixelformat = to_uvc_format(uformat)->fcc; + fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB; + fmt->fmt.pix.priv = 0; + + return 0; +} + static int uvc_v4l2_enum_frameintervals(struct file *file, void *fh, struct v4l2_frmivalenum *fival) @@ -471,6 +580,7 @@ uvc_v4l2_ioctl_default(struct file *file, void *fh, bool valid_prio, const struct v4l2_ioctl_ops uvc_v4l2_ioctl_ops = { .vidioc_querycap = uvc_v4l2_querycap, + .vidioc_try_fmt_vid_out = uvc_v4l2_try_format, .vidioc_g_fmt_vid_out = uvc_v4l2_get_format, .vidioc_s_fmt_vid_out = uvc_v4l2_set_format, .vidioc_enum_frameintervals = uvc_v4l2_enum_frameintervals,