[PATCH 0/4] [media] Fixes for colorspace logic in exynos-gsc and s5p-mfc drivers

Hello,

This patchset fixes a few issues on the colorspace logic for the exynos-gsc
and s5p-mfc drivers.

We now handle the colorspace in those drivers, and make sure to respect user setting if
possible.

We also now set the 'v4l2_pix_format:field' if userspace passed ANY, avoiding GStreamer
spamming error at us about the driver not following the standard.

Best regards,

Thibault Saunier


Javier Martinez Canillas (1):
  [media] exynos-gsc: Use 576p instead 720p as a threshold for
    colorspaces

Thibault Saunier (3):
  [media] exynos-gsc: Respect userspace colorspace setting
  [media] s5p-mfc: Set colorspace in VIDIO_{G,TRY}_FMT
  [media] s5p-mfc: Always check and set 'v4l2_pix_format:field' field

 drivers/media/platform/exynos-gsc/gsc-core.c | 22 +++++++++++----
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 42 ++++++++++++++++++++++++++--
 2 files changed, 57 insertions(+), 7 deletions(-)

-- 
2.11.1

If the colorspace is specified by userspace we should respect
it and not reset it ourself if we can support it.

Signed-off-by: Thibault Saunier <redacted>
---
 drivers/media/platform/exynos-gsc/gsc-core.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c
index 2beb43401987..63bb4577827d 100644
--- a/drivers/media/platform/exynos-gsc/gsc-core.c
+++ b/drivers/media/platform/exynos-gsc/gsc-core.c

@@ -445,10 +445,14 @@ int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
 
 	pix_mp->num_planes = fmt->num_planes;
 
-	if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
-		pix_mp->colorspace = V4L2_COLORSPACE_REC709;
-	else /* SD */
-		pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
+	if (pix_mp->colorspace != V4L2_COLORSPACE_REC709 &&
+		pix_mp->colorspace != V4L2_COLORSPACE_SMPTE170M &&
+		pix_mp->colorspace != V4L2_COLORSPACE_DEFAULT) {
+		if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
+		  pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+		else /* SD */
+		  pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
+	  }
 
 	for (i = 0; i < pix_mp->num_planes; ++i) {
 		struct v4l2_plane_pix_format *plane_fmt = &pix_mp->plane_fmt[i];

@@ -492,12 +496,17 @@ int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
 	pix_mp->height		= frame->f_height;
 	pix_mp->field		= V4L2_FIELD_NONE;
 	pix_mp->pixelformat	= frame->fmt->pixelformat;
-	if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
-		pix_mp->colorspace = V4L2_COLORSPACE_REC709;
-	else /* SD */
-		pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
 	pix_mp->num_planes	= frame->fmt->num_planes;
 
+	if (pix_mp->colorspace != V4L2_COLORSPACE_REC709 &&
+		pix_mp->colorspace != V4L2_COLORSPACE_SMPTE170M &&
+		pix_mp->colorspace != V4L2_COLORSPACE_DEFAULT) {
+		if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
+		  pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+		else /* SD */
+		  pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
+	  }
+
 	for (i = 0; i < pix_mp->num_planes; ++i) {
 		pix_mp->plane_fmt[i].bytesperline = (frame->f_width *
 			frame->fmt->depth[i]) / 8;

-- 
2.11.1

The media documentation says that the V4L2_COLORSPACE_SMPTE170M colorspace
should be used for SDTV and V4L2_COLORSPACE_REC709 for HDTV but the driver
didn't set the colorimetry, also respect usespace setting.

Use 576p display resolution as a threshold to set this.

Signed-off-by: Thibault Saunier <redacted>
---
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index 367ef8e8dbf0..960d6c7052bd 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c

@@ -354,6 +354,15 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 		pix_mp->plane_fmt[0].sizeimage = ctx->luma_size;
 		pix_mp->plane_fmt[1].bytesperline = ctx->buf_width;
 		pix_mp->plane_fmt[1].sizeimage = ctx->chroma_size;
+
+		if (pix_mp->colorspace != V4L2_COLORSPACE_REC709 &&
+			pix_mp->colorspace != V4L2_COLORSPACE_SMPTE170M &&
+			pix_mp->colorspace != V4L2_COLORSPACE_DEFAULT) {
+		  if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
+			pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+		  else /* SD */
+			pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
+		}
 	} else if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 		/* This is run on OUTPUT
 		   The buffer contains compressed image

@@ -378,6 +387,7 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
 {
 	struct s5p_mfc_dev *dev = video_drvdata(file);
+	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
 	struct s5p_mfc_fmt *fmt;
 
 	mfc_debug(2, "Type is %d\n", f->type);

@@ -405,6 +415,15 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
 			mfc_err("Unsupported format by this MFC version.\n");
 			return -EINVAL;
 		}
+
+		if (pix_mp->colorspace != V4L2_COLORSPACE_REC709 &&
+			pix_mp->colorspace != V4L2_COLORSPACE_SMPTE170M &&
+			pix_mp->colorspace != V4L2_COLORSPACE_DEFAULT) {
+		  if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
+			pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+		  else /* SD */
+			pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
+		}
 	}
 
 	return 0;

-- 
2.11.1

From: Javier Martinez Canillas <redacted>

The media documentation says that the V4L2_COLORSPACE_SMPTE170M colorspace
should be used for SDTV and V4L2_COLORSPACE_REC709 for HDTV. But drivers
don't agree on the display resolution that should be used as a threshold.

Some drivers set V4L2_COLORSPACE_REC709 for 720p and higher while others
set V4L2_COLORSPACE_REC709 for anything higher than 576p. Newers drivers
use the latter and that also matches what user-space multimedia programs
do (i.e: GStreamer), so change the driver logic to be aligned with this.

Also, check for the resolution in G_FMT instead unconditionally setting
the V4L2_COLORSPACE_REC709 colorspace.

Signed-off-by: Javier Martinez Canillas <redacted>
---
 drivers/media/platform/exynos-gsc/gsc-core.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c
index cbb03768f5d7..2beb43401987 100644
--- a/drivers/media/platform/exynos-gsc/gsc-core.c
+++ b/drivers/media/platform/exynos-gsc/gsc-core.c

@@ -445,7 +445,7 @@ int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
 
 	pix_mp->num_planes = fmt->num_planes;
 
-	if (pix_mp->width >= 1280) /* HD */
+	if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
 		pix_mp->colorspace = V4L2_COLORSPACE_REC709;
 	else /* SD */
 		pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;

@@ -492,7 +492,10 @@ int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
 	pix_mp->height		= frame->f_height;
 	pix_mp->field		= V4L2_FIELD_NONE;
 	pix_mp->pixelformat	= frame->fmt->pixelformat;
-	pix_mp->colorspace	= V4L2_COLORSPACE_REC709;
+	if (pix_mp->width > 720 && pix_mp->height > 576) /* HD */
+		pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+	else /* SD */
+		pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
 	pix_mp->num_planes	= frame->fmt->num_planes;
 
 	for (i = 0; i < pix_mp->num_planes; ++i) {

-- 
2.11.1

It is required by the standard that the field order is set by the
driver.

Signed-off-by: Thibault Saunier <redacted>
---
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index 960d6c7052bd..dfb21b4aee10 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c

@@ -345,7 +345,6 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 		   rectangle. */
 		pix_mp->width = ctx->buf_width;
 		pix_mp->height = ctx->buf_height;
-		pix_mp->field = V4L2_FIELD_NONE;
 		pix_mp->num_planes = 2;
 		/* Set pixelformat to the format in which MFC
 		   outputs the decoded frame */

@@ -369,7 +368,6 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 		   so width and height have no meaning */
 		pix_mp->width = 0;
 		pix_mp->height = 0;
-		pix_mp->field = V4L2_FIELD_NONE;
 		pix_mp->plane_fmt[0].bytesperline = ctx->dec_src_buf_size;
 		pix_mp->plane_fmt[0].sizeimage = ctx->dec_src_buf_size;
 		pix_mp->pixelformat = ctx->src_fmt->fourcc;

@@ -379,6 +377,14 @@ static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 		mfc_debug(2, "%s-- with error\n", __func__);
 		return -EINVAL;
 	}
+
+	if (pix_mp->field == V4L2_FIELD_ANY) {
+		pix_mp->field = V4L2_FIELD_NONE;
+	} else if (pix_mp->field != V4L2_FIELD_NONE) {
+		mfc_err("Not supported field order(%d)\n", pix_mp->field);
+		return -EINVAL;
+	}
+
 	mfc_debug_leave();
 	return 0;
 }

@@ -389,6 +395,19 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
 	struct s5p_mfc_dev *dev = video_drvdata(file);
 	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
 	struct s5p_mfc_fmt *fmt;
+	enum v4l2_field field;
+
+	field = f->fmt.pix.field;
+	if (field == V4L2_FIELD_ANY) {
+		field = V4L2_FIELD_NONE;
+	} else if (V4L2_FIELD_NONE != field) {
+		mfc_debug("Not supported field order(%d)\n", pix_mp->field);
+		return -EINVAL;
+	}
+
+	/* V4L2 specification suggests the driver corrects the format struct
+	 * if any of the dimensions is unsupported */
+	f->fmt.pix.field = field;
 
 	mfc_debug(2, "Type is %d\n", f->type);
 	if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {

-- 
2.11.1

Hi Thibault,

[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v4.10-rc7 next-20170209]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Thibault-Saunier/exynos-gsc-Use-576p-instead-720p-as-a-threshold-for-colorspaces/20170210-113658
base:   git://linuxtv.org/media_tree.git master
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All error/warnings (new ones prefixed by >>):

   In file included from drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:28:0:
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c: In function 'vidioc_try_fmt':

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:25:23: warning: comparison between pointer and integer

      if (mfc_debug_level >= level)   \
                          ^

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: note: in expansion of macro 'mfc_debug'

      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
      ^~~~~~~~~

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:25:23: warning: comparison with string literal results in unspecified behavior [-Waddress]

      if (mfc_debug_level >= level)   \
                          ^

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: note: in expansion of macro 'mfc_debug'

      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
      ^~~~~~~~~

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:48: error: expected ')' before 'pix_mp'

      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
                                                   ^
   drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:26:32: note: in definition of macro 'mfc_debug'
       printk(KERN_DEBUG "%s:%d: " fmt, \
                                   ^~~
   In file included from include/linux/printk.h:6:0,
                    from include/linux/kernel.h:13,
                    from include/linux/clk.h:16,
                    from drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:14:
   include/linux/kern_levels.h:4:18: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:14:20: note: in expansion of macro 'KERN_SOH'
    #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
                       ^~~~~~~~
   drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:26:11: note: in expansion of macro 'KERN_DEBUG'
       printk(KERN_DEBUG "%s:%d: " fmt, \
              ^~~~~~~~~~

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: note: in expansion of macro 'mfc_debug'

      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
      ^~~~~~~~~
   include/linux/kern_levels.h:4:18: warning: format '%d' expects a matching 'int' argument [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:14:20: note: in expansion of macro 'KERN_SOH'
    #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
                       ^~~~~~~~
   drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:26:11: note: in expansion of macro 'KERN_DEBUG'
       printk(KERN_DEBUG "%s:%d: " fmt, \
              ^~~~~~~~~~

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: note: in expansion of macro 'mfc_debug'

      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
      ^~~~~~~~~

vim +404 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c

   398		enum v4l2_field field;
   399	
   400		field = f->fmt.pix.field;
   401		if (field == V4L2_FIELD_ANY) {
   402			field = V4L2_FIELD_NONE;
   403		} else if (V4L2_FIELD_NONE != field) {
 > 404			mfc_debug("Not supported field order(%d)\n", pix_mp->field);
   405			return -EINVAL;
   406		}
   407	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
-------------- next part --------------
A non-text attachment was scrubbed...
Name: .config.gz
Type: application/gzip
Size: 45920 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20170210/8dd6e8c7/attachment-0001.gz>

Hi Thibault,

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on v4.10-rc7 next-20170210]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Thibault-Saunier/exynos-gsc-Use-576p-instead-720p-as-a-threshold-for-colorspaces/20170210-113658
base:   git://linuxtv.org/media_tree.git master
config: openrisc-allmodconfig (attached as .config)
compiler: or32-linux-gcc (GCC) 4.5.1-or32-1.0rc1
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=openrisc 

All warnings (new ones prefixed by >>):

   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c: In function 'vidioc_try_fmt':

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: warning: comparison between pointer and integer
drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: warning: comparison with string literal results in unspecified behavior

   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: error: expected ')' before 'pix_mp'

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: warning: too few arguments for format

vim +404 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c

   388		mfc_debug_leave();
   389		return 0;
   390	}
   391	
   392	/* Try format */
   393	static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
   394	{
   395		struct s5p_mfc_dev *dev = video_drvdata(file);
   396		struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
   397		struct s5p_mfc_fmt *fmt;
   398		enum v4l2_field field;
   399	
   400		field = f->fmt.pix.field;
   401		if (field == V4L2_FIELD_ANY) {
   402			field = V4L2_FIELD_NONE;
   403		} else if (V4L2_FIELD_NONE != field) {
 > 404			mfc_debug("Not supported field order(%d)\n", pix_mp->field);
   405			return -EINVAL;
   406		}
   407	
   408		/* V4L2 specification suggests the driver corrects the format struct
   409		 * if any of the dimensions is unsupported */
   410		f->fmt.pix.field = field;
   411	
   412		mfc_debug(2, "Type is %d\n", f->type);

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
-------------- next part --------------
A non-text attachment was scrubbed...
Name: .config.gz
Type: application/gzip
Size: 40023 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20170210/eac3a32b/attachment-0001.gz>

Hi Thibault,

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on v4.10-rc7 next-20170209]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Thibault-Saunier/exynos-gsc-Use-576p-instead-720p-as-a-threshold-for-colorspaces/20170210-113658
base:   git://linuxtv.org/media_tree.git master
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

   include/linux/compiler.h:253:8: sparse: attribute 'no_sanitize_address': unknown attribute
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:17: sparse: Expected ) in function call
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:17: sparse: got pix_mp

quoted

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:17: sparse: incompatible types for operation (>=)

   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:17:    left side has type int extern [signed] [addressable] [toplevel] mfc_debug_level
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:17:    right side has type char static *<noident>
   In file included from drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:28:0:
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c: In function 'vidioc_try_fmt':
   drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:25:23: warning: comparison between pointer and integer
      if (mfc_debug_level >= level)   \
                          ^
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: note: in expansion of macro 'mfc_debug'
      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
      ^~~~~~~~~
   drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:25:23: warning: comparison with string literal results in unspecified behavior [-Waddress]
      if (mfc_debug_level >= level)   \
                          ^
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: note: in expansion of macro 'mfc_debug'
      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
      ^~~~~~~~~
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:48: error: expected ')' before 'pix_mp'
      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
                                                   ^
   drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:26:32: note: in definition of macro 'mfc_debug'
       printk(KERN_DEBUG "%s:%d: " fmt, \
                                   ^~~
   In file included from include/linux/printk.h:6:0,
                    from include/linux/kernel.h:13,
                    from include/linux/clk.h:16,
                    from drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:14:
   include/linux/kern_levels.h:4:18: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:14:20: note: in expansion of macro 'KERN_SOH'
    #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
                       ^~~~~~~~
   drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:26:11: note: in expansion of macro 'KERN_DEBUG'
       printk(KERN_DEBUG "%s:%d: " fmt, \
              ^~~~~~~~~~
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: note: in expansion of macro 'mfc_debug'
      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
      ^~~~~~~~~
   include/linux/kern_levels.h:4:18: warning: format '%d' expects a matching 'int' argument [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:14:20: note: in expansion of macro 'KERN_SOH'
    #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
                       ^~~~~~~~
   drivers/media/platform/s5p-mfc/s5p_mfc_debug.h:26:11: note: in expansion of macro 'KERN_DEBUG'
       printk(KERN_DEBUG "%s:%d: " fmt, \
              ^~~~~~~~~~
   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c:404:3: note: in expansion of macro 'mfc_debug'
      mfc_debug("Not supported field order(%d)\n", pix_mp->field);
      ^~~~~~~~~

vim +404 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c

   388		mfc_debug_leave();
   389		return 0;
   390	}
   391	
   392	/* Try format */
   393	static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
   394	{
   395		struct s5p_mfc_dev *dev = video_drvdata(file);
   396		struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
   397		struct s5p_mfc_fmt *fmt;
   398		enum v4l2_field field;
   399	
   400		field = f->fmt.pix.field;
   401		if (field == V4L2_FIELD_ANY) {
   402			field = V4L2_FIELD_NONE;
   403		} else if (V4L2_FIELD_NONE != field) {
 > 404			mfc_debug("Not supported field order(%d)\n", pix_mp->field);
   405			return -EINVAL;
   406		}
   407	
   408		/* V4L2 specification suggests the driver corrects the format struct
   409		 * if any of the dimensions is unsupported */
   410		f->fmt.pix.field = field;
   411	
   412		mfc_debug(2, "Type is %d\n", f->type);

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation