From patchwork Mon Feb 8 20:09:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 12076471 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84074C433E6 for ; Mon, 8 Feb 2021 20:20:15 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 34EF564E5D for ; Mon, 8 Feb 2021 20:20:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 34EF564E5D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 99E556E9ED; Mon, 8 Feb 2021 20:20:06 +0000 (UTC) Received: from hillosipuli.retiisi.eu (retiisi.eu [95.216.213.190]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7F87C6E9EB for ; Mon, 8 Feb 2021 20:20:02 +0000 (UTC) Received: from lanttu.localdomain (lanttu-e.localdomain [192.168.1.64]) by hillosipuli.retiisi.eu (Postfix) with ESMTP id D78D4634C89; Mon, 8 Feb 2021 22:08:33 +0200 (EET) From: Sakari Ailus To: linux-kernel@vger.kernel.org Subject: [PATCH v6 1/3] lib/vsprintf: Add support for printing V4L2 and DRM fourccs Date: Mon, 8 Feb 2021 22:09:01 +0200 Message-Id: <20210208200903.28084-2-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210208200903.28084-1-sakari.ailus@linux.intel.com> References: <20210208200903.28084-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Petr Mladek , mchehab@kernel.org, Dave Stevenson , Rasmus Villemoes , dri-devel@lists.freedesktop.org, hverkuil@xs4all.nl, Sergey Senozhatsky , Steven Rostedt , laurent.pinchart@ideasonboard.com, Joe Perches , Andy Shevchenko , linux-media@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a printk modifier %p4cc (for pixel format) for printing V4L2 and DRM pixel formats denoted by fourccs. The fourcc encoding is the same for both so the same implementation can be used. Suggested-by: Mauro Carvalho Chehab Signed-off-by: Sakari Ailus Reviewed-by: Petr Mladek Reviewed-by: Sergey Senozhatsky --- Documentation/core-api/printk-formats.rst | 16 +++++++ lib/test_printf.c | 17 ++++++++ lib/vsprintf.c | 51 +++++++++++++++++++++++ scripts/checkpatch.pl | 6 ++- 4 files changed, 88 insertions(+), 2 deletions(-) diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index 160e710d992f..da2aa065dc42 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -567,6 +567,22 @@ For printing netdev_features_t. Passed by reference. +V4L2 and DRM FourCC code (pixel format) +--------------------------------------- + +:: + + %p4cc + +Print a FourCC code used by V4L2 or DRM, including format endianness and +its numerical value as hexadecimal. + +Passed by reference. + +Examples:: + + %p4cc BG12 little-endian (0x32314742) + Thanks ====== diff --git a/lib/test_printf.c b/lib/test_printf.c index 7d60f24240a4..78c94159d9d5 100644 --- a/lib/test_printf.c +++ b/lib/test_printf.c @@ -647,6 +647,22 @@ static void __init fwnode_pointer(void) software_node_unregister_nodes(softnodes); } +static void __init fourcc_pointer(void) +{ + struct { + u32 code; + char *str; + } const try[] = { + { 0x20104646, "FF(10) little-endian (0x20104646)", }, + { 0xa0104646, "FF(10) big-endian (0xa0104646)", }, + { 0x10111213, "(13)(12)(11)(10) little-endian (0x10111213)", }, + }; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(try); i++) + test(try[i].str, "%p4cc", &try[i].code); +} + static void __init errptr(void) { @@ -692,6 +708,7 @@ test_pointer(void) flags(); errptr(); fwnode_pointer(); + fourcc_pointer(); } static void __init selftest(void) diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 3b53c73580c5..ef50557e07b3 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1733,6 +1733,54 @@ char *netdev_bits(char *buf, char *end, const void *addr, return special_hex_number(buf, end, num, size); } +static noinline_for_stack +char *fourcc_string(char *buf, char *end, const u32 *fourcc, + struct printf_spec spec, const char *fmt) +{ + char output[sizeof("(xx)(xx)(xx)(xx) little-endian (0x01234567)")]; + char *p = output; + unsigned int i; + u32 val; + + if (fmt[1] != 'c' || fmt[2] != 'c') + return error_string(buf, end, "(%p4?)", spec); + + if (check_pointer(&buf, end, fourcc, spec)) + return buf; + + val = *fourcc & ~BIT(31); + + for (i = 0; i < sizeof(*fourcc); i++) { + unsigned char c = val >> (i * 8); + + /* Weed out spaces */ + if (c == ' ') + continue; + + /* Print non-control ASCII characters as-is */ + if (isascii(c) && isprint(c)) { + *p++ = c; + continue; + } + + *p++ = '('; + p = hex_byte_pack(p, c); + *p++ = ')'; + } + + strcpy(p, *fourcc & BIT(31) ? " big-endian" : " little-endian"); + p += strlen(p); + + *p++ = ' '; + *p++ = '('; + p = special_hex_number(p, output + sizeof(output) - 2, *fourcc, + sizeof(u32)); + *p++ = ')'; + *p = '\0'; + + return string(buf, end, output, spec); +} + static noinline_for_stack char *address_val(char *buf, char *end, const void *addr, struct printf_spec spec, const char *fmt) @@ -2162,6 +2210,7 @@ char *fwnode_string(char *buf, char *end, struct fwnode_handle *fwnode, * correctness of the format string and va_list arguments. * - 'K' For a kernel pointer that should be hidden from unprivileged users * - 'NF' For a netdev_features_t + * - '4cc' V4L2 or DRM FourCC code, with endianness and raw numerical value. * - 'h[CDN]' For a variable-length buffer, it prints it as a hex string with * a certain separator (' ' by default): * C colon @@ -2259,6 +2308,8 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, return restricted_pointer(buf, end, ptr, spec); case 'N': return netdev_bits(buf, end, ptr, spec, fmt); + case '4': + return fourcc_string(buf, end, ptr, spec, fmt); case 'a': return address_val(buf, end, ptr, spec, fmt); case 'd': diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 92e888ed939f..79858e07d023 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -6557,9 +6557,11 @@ sub process { $specifier = $1; $extension = $2; $qualifier = $3; - if ($extension !~ /[SsBKRraEehMmIiUDdgVCbGNOxtf]/ || + if ($extension !~ /[4SsBKRraEehMmIiUDdgVCbGNOxtf]/ || ($extension eq "f" && - defined $qualifier && $qualifier !~ /^w/)) { + defined $qualifier && $qualifier !~ /^w/) || + ($extension eq "4" && + defined $qualifier && $qualifier !~ /^cc/)) { $bad_specifier = $specifier; last; } From patchwork Mon Feb 8 20:09:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 12076469 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8283BC433DB for ; Mon, 8 Feb 2021 20:20:13 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0FD7264E66 for ; Mon, 8 Feb 2021 20:20:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0FD7264E66 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D32D66E9EC; Mon, 8 Feb 2021 20:20:05 +0000 (UTC) X-Greylist: delayed 657 seconds by postgrey-1.36 at gabe; Mon, 08 Feb 2021 20:20:02 UTC Received: from hillosipuli.retiisi.eu (retiisi.eu [95.216.213.190]) by gabe.freedesktop.org (Postfix) with ESMTPS id 64A846E9EA for ; Mon, 8 Feb 2021 20:20:02 +0000 (UTC) Received: from lanttu.localdomain (lanttu-e.localdomain [192.168.1.64]) by hillosipuli.retiisi.eu (Postfix) with ESMTP id EE691634C8C; Mon, 8 Feb 2021 22:08:33 +0200 (EET) From: Sakari Ailus To: linux-kernel@vger.kernel.org Subject: [PATCH v6 2/3] v4l: ioctl: Use %p4cc printk modifier to print FourCC codes Date: Mon, 8 Feb 2021 22:09:02 +0200 Message-Id: <20210208200903.28084-3-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210208200903.28084-1-sakari.ailus@linux.intel.com> References: <20210208200903.28084-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Petr Mladek , mchehab@kernel.org, Dave Stevenson , Rasmus Villemoes , dri-devel@lists.freedesktop.org, hverkuil@xs4all.nl, Sergey Senozhatsky , Steven Rostedt , laurent.pinchart@ideasonboard.com, Joe Perches , Andy Shevchenko , linux-media@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Now that we can print FourCC codes directly using printk, make use of the feature in V4L2 core. Signed-off-by: Sakari Ailus --- drivers/media/v4l2-core/v4l2-ioctl.c | 85 +++++++--------------------- 1 file changed, 21 insertions(+), 64 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 31d1342e61e8..31662c3a8c9e 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -265,13 +265,9 @@ static void v4l_print_fmtdesc(const void *arg, bool write_only) { const struct v4l2_fmtdesc *p = arg; - pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, mbus_code=0x%04x, description='%.*s'\n", + pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n", p->index, prt_names(p->type, v4l2_type_names), - p->flags, (p->pixelformat & 0xff), - (p->pixelformat >> 8) & 0xff, - (p->pixelformat >> 16) & 0xff, - (p->pixelformat >> 24) & 0xff, - p->mbus_code, + p->flags, &p->pixelformat, p->mbus_code, (int)sizeof(p->description), p->description); } @@ -293,12 +289,8 @@ static void v4l_print_format(const void *arg, bool write_only) case V4L2_BUF_TYPE_VIDEO_CAPTURE: case V4L2_BUF_TYPE_VIDEO_OUTPUT: pix = &p->fmt.pix; - pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", - pix->width, pix->height, - (pix->pixelformat & 0xff), - (pix->pixelformat >> 8) & 0xff, - (pix->pixelformat >> 16) & 0xff, - (pix->pixelformat >> 24) & 0xff, + pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", + pix->width, pix->height, &pix->pixelformat, prt_names(pix->field, v4l2_field_names), pix->bytesperline, pix->sizeimage, pix->colorspace, pix->flags, pix->ycbcr_enc, @@ -307,12 +299,8 @@ static void v4l_print_format(const void *arg, bool write_only) case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: mp = &p->fmt.pix_mp; - pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", - mp->width, mp->height, - (mp->pixelformat & 0xff), - (mp->pixelformat >> 8) & 0xff, - (mp->pixelformat >> 16) & 0xff, - (mp->pixelformat >> 24) & 0xff, + pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", + mp->width, mp->height, &mp->pixelformat, prt_names(mp->field, v4l2_field_names), mp->colorspace, mp->num_planes, mp->flags, mp->ycbcr_enc, mp->quantization, mp->xfer_func); @@ -337,13 +325,9 @@ static void v4l_print_format(const void *arg, bool write_only) case V4L2_BUF_TYPE_VBI_CAPTURE: case V4L2_BUF_TYPE_VBI_OUTPUT: vbi = &p->fmt.vbi; - pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", + pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n", vbi->sampling_rate, vbi->offset, - vbi->samples_per_line, - (vbi->sample_format & 0xff), - (vbi->sample_format >> 8) & 0xff, - (vbi->sample_format >> 16) & 0xff, - (vbi->sample_format >> 24) & 0xff, + vbi->samples_per_line, &vbi->sample_format, vbi->start[0], vbi->start[1], vbi->count[0], vbi->count[1]); break; @@ -360,21 +344,13 @@ static void v4l_print_format(const void *arg, bool write_only) case V4L2_BUF_TYPE_SDR_CAPTURE: case V4L2_BUF_TYPE_SDR_OUTPUT: sdr = &p->fmt.sdr; - pr_cont(", pixelformat=%c%c%c%c\n", - (sdr->pixelformat >> 0) & 0xff, - (sdr->pixelformat >> 8) & 0xff, - (sdr->pixelformat >> 16) & 0xff, - (sdr->pixelformat >> 24) & 0xff); + pr_cont(", pixelformat=%p4cc\n", &sdr->pixelformat); break; case V4L2_BUF_TYPE_META_CAPTURE: case V4L2_BUF_TYPE_META_OUTPUT: meta = &p->fmt.meta; - pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n", - (meta->dataformat >> 0) & 0xff, - (meta->dataformat >> 8) & 0xff, - (meta->dataformat >> 16) & 0xff, - (meta->dataformat >> 24) & 0xff, - meta->buffersize); + pr_cont(", dataformat=%p4cc, buffersize=%u\n", + &meta->dataformat, meta->buffersize); break; } } @@ -383,15 +359,10 @@ static void v4l_print_framebuffer(const void *arg, bool write_only) { const struct v4l2_framebuffer *p = arg; - pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n", - p->capability, p->flags, p->base, - p->fmt.width, p->fmt.height, - (p->fmt.pixelformat & 0xff), - (p->fmt.pixelformat >> 8) & 0xff, - (p->fmt.pixelformat >> 16) & 0xff, - (p->fmt.pixelformat >> 24) & 0xff, - p->fmt.bytesperline, p->fmt.sizeimage, - p->fmt.colorspace); + pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n", + p->capability, p->flags, p->base, p->fmt.width, p->fmt.height, + &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage, + p->fmt.colorspace); } static void v4l_print_buftype(const void *arg, bool write_only) @@ -761,13 +732,8 @@ static void v4l_print_frmsizeenum(const void *arg, bool write_only) { const struct v4l2_frmsizeenum *p = arg; - pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", - p->index, - (p->pixel_format & 0xff), - (p->pixel_format >> 8) & 0xff, - (p->pixel_format >> 16) & 0xff, - (p->pixel_format >> 24) & 0xff, - p->type); + pr_cont("index=%u, pixelformat=%p4cc, type=%u", + p->index, &p->pixel_format, p->type); switch (p->type) { case V4L2_FRMSIZE_TYPE_DISCRETE: pr_cont(", wxh=%ux%u\n", @@ -793,13 +759,8 @@ static void v4l_print_frmivalenum(const void *arg, bool write_only) { const struct v4l2_frmivalenum *p = arg; - pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", - p->index, - (p->pixel_format & 0xff), - (p->pixel_format >> 8) & 0xff, - (p->pixel_format >> 16) & 0xff, - (p->pixel_format >> 24) & 0xff, - p->width, p->height, p->type); + pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u", + p->index, &p->pixel_format, p->width, p->height, p->type); switch (p->type) { case V4L2_FRMIVAL_TYPE_DISCRETE: pr_cont(", fps=%d/%d\n", @@ -1459,12 +1420,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) return; WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); flags = 0; - snprintf(fmt->description, sz, "%c%c%c%c%s", - (char)(fmt->pixelformat & 0x7f), - (char)((fmt->pixelformat >> 8) & 0x7f), - (char)((fmt->pixelformat >> 16) & 0x7f), - (char)((fmt->pixelformat >> 24) & 0x7f), - (fmt->pixelformat & (1UL << 31)) ? "-BE" : ""); + snprintf(fmt->description, sz, "%p4cc", + &fmt->pixelformat); break; } } From patchwork Mon Feb 8 20:09:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 12076465 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C966C433E0 for ; Mon, 8 Feb 2021 20:20:04 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 592E264E5D for ; Mon, 8 Feb 2021 20:20:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 592E264E5D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 17EC86E9EA; Mon, 8 Feb 2021 20:20:03 +0000 (UTC) Received: from hillosipuli.retiisi.eu (hillosipuli.retiisi.eu [IPv6:2a01:4f9:c010:4572::81:2]) by gabe.freedesktop.org (Postfix) with ESMTPS id F21956E9EB for ; Mon, 8 Feb 2021 20:20:01 +0000 (UTC) Received: from lanttu.localdomain (lanttu-e.localdomain [192.168.1.64]) by hillosipuli.retiisi.eu (Postfix) with ESMTP id 0F4AA634C8D; Mon, 8 Feb 2021 22:08:34 +0200 (EET) From: Sakari Ailus To: linux-kernel@vger.kernel.org Subject: [PATCH v6 3/3] drm/fourcc: Switch to %p4cc format modifier Date: Mon, 8 Feb 2021 22:09:03 +0200 Message-Id: <20210208200903.28084-4-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210208200903.28084-1-sakari.ailus@linux.intel.com> References: <20210208200903.28084-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Petr Mladek , mchehab@kernel.org, Dave Stevenson , Rasmus Villemoes , dri-devel@lists.freedesktop.org, hverkuil@xs4all.nl, Sergey Senozhatsky , Steven Rostedt , laurent.pinchart@ideasonboard.com, Joe Perches , Andy Shevchenko , linux-media@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Instead of constructing the FourCC code manually, use the %p4cc printk modifier to print it. Also leave a message to avoid using this function. The next step would be to convert the users to use %p4cc directly instead and removing the function. Signed-off-by: Sakari Ailus --- drivers/gpu/drm/drm_fourcc.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index 03262472059c..4ff40f2f27c0 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -30,11 +30,6 @@ #include #include -static char printable_char(int c) -{ - return isascii(c) && isprint(c) ? c : '?'; -} - /** * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description * @bpp: bits per pixels @@ -134,17 +129,12 @@ EXPORT_SYMBOL(drm_driver_legacy_fb_format); * drm_get_format_name - fill a string with a drm fourcc format's name * @format: format to compute name of * @buf: caller-supplied buffer + * + * Please use %p4cc printk format modifier instead of this function. */ const char *drm_get_format_name(uint32_t format, struct drm_format_name_buf *buf) { - snprintf(buf->str, sizeof(buf->str), - "%c%c%c%c %s-endian (0x%08x)", - printable_char(format & 0xff), - printable_char((format >> 8) & 0xff), - printable_char((format >> 16) & 0xff), - printable_char((format >> 24) & 0x7f), - format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", - format); + snprintf(buf->str, sizeof(buf->str), "%p4cc", &format); return buf->str; }