On 9/19/19 10:41 PM, Benoit Parrot wrote: > print_fourcc helper function was used for debug log to > convert a pixel format code into its readable form for display > purposes. But since it used a single static buffer to perform > the conversion this might lead to display format issue when more > than one instance was invoked simultaneously. > > It turns out that print_fourcc can be safely replace by using > "%4pE" instead and passing the pointer to the fourcc code. If this series is merged: https://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg149985.html then this patch needs to be rewritten. So I'll skip this patch for now. Regards, Hans > > Signed-off-by: Benoit Parrot <bparrot@xxxxxx> > --- > drivers/media/platform/am437x/am437x-vpfe.c | 42 +++++++-------------- > 1 file changed, 14 insertions(+), 28 deletions(-) > > diff --git a/drivers/media/platform/am437x/am437x-vpfe.c b/drivers/media/platform/am437x/am437x-vpfe.c > index 605a6bb7e6c2..ad46e037fe89 100644 > --- a/drivers/media/platform/am437x/am437x-vpfe.c > +++ b/drivers/media/platform/am437x/am437x-vpfe.c > @@ -221,20 +221,6 @@ static void pix_to_mbus(struct vpfe_device *vpfe, > v4l2_fill_mbus_format(mbus_fmt, pix_fmt, fmt->code); > } > > -/* Print Four-character-code (FOURCC) */ > -static char *print_fourcc(u32 fmt) > -{ > - static char code[5]; > - > - code[0] = (unsigned char)(fmt & 0xff); > - code[1] = (unsigned char)((fmt >> 8) & 0xff); > - code[2] = (unsigned char)((fmt >> 16) & 0xff); > - code[3] = (unsigned char)((fmt >> 24) & 0xff); > - code[4] = '\0'; > - > - return code; > -} > - > static int > cmp_v4l2_format(const struct v4l2_format *lhs, const struct v4l2_format *rhs) > { > @@ -696,8 +682,8 @@ static int vpfe_ccdc_set_pixel_format(struct vpfe_ccdc *ccdc, u32 pixfmt) > { > struct vpfe_device *vpfe = container_of(ccdc, struct vpfe_device, ccdc); > > - vpfe_dbg(1, vpfe, "%s: if_type: %d, pixfmt:%s\n", > - __func__, ccdc->ccdc_cfg.if_type, print_fourcc(pixfmt)); > + vpfe_dbg(1, vpfe, "%s: if_type: %d, pixfmt:%4pE\n", > + __func__, ccdc->ccdc_cfg.if_type, &pixfmt); > > if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER) { > ccdc->ccdc_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW; > @@ -983,8 +969,8 @@ static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe) > enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED; > int ret = 0; > > - vpfe_dbg(1, vpfe, "pixelformat: %s\n", > - print_fourcc(vpfe->fmt.fmt.pix.pixelformat)); > + vpfe_dbg(1, vpfe, "pixelformat: %4pE\n", > + &vpfe->fmt.fmt.pix.pixelformat); > > if (vpfe_ccdc_set_pixel_format(&vpfe->ccdc, > vpfe->fmt.fmt.pix.pixelformat) < 0) { > @@ -1392,9 +1378,9 @@ static int __vpfe_get_format(struct vpfe_device *vpfe, > format->type = vpfe->fmt.type; > > vpfe_dbg(1, vpfe, > - "%s: size %dx%d (%s) bytesperline = %d, size = %d, bpp = %d\n", > + "%s: size %dx%d (%4pE) bytesperline = %d, size = %d, bpp = %d\n", > __func__, format->fmt.pix.width, format->fmt.pix.height, > - print_fourcc(format->fmt.pix.pixelformat), > + &format->fmt.pix.pixelformat, > format->fmt.pix.bytesperline, format->fmt.pix.sizeimage, *bpp); > > return 0; > @@ -1427,9 +1413,9 @@ static int __vpfe_set_format(struct vpfe_device *vpfe, > format->type = vpfe->fmt.type; > > vpfe_dbg(1, vpfe, > - "%s size %dx%d (%s) bytesperline = %d, size = %d, bpp = %d\n", > + "%s: size %dx%d (%4pE) bytesperline = %d, size = %d, bpp = %d\n", > __func__, format->fmt.pix.width, format->fmt.pix.height, > - print_fourcc(format->fmt.pix.pixelformat), > + &format->fmt.pix.pixelformat, > format->fmt.pix.bytesperline, format->fmt.pix.sizeimage, *bpp); > > return 0; > @@ -1463,8 +1449,8 @@ static int vpfe_enum_fmt(struct file *file, void *priv, > > f->pixelformat = fmt->fourcc; > > - vpfe_dbg(1, vpfe, "%s: mbus index: %d code: %x pixelformat: %s\n", > - __func__, f->index, fmt->code, print_fourcc(fmt->fourcc)); > + vpfe_dbg(1, vpfe, "%s: mbus index: %d code: %x pixelformat: %4pE\n", > + __func__, f->index, fmt->code, &fmt->fourcc); > > return 0; > } > @@ -1571,8 +1557,8 @@ static int vpfe_enum_size(struct file *file, void *priv, > fsize->discrete.width = fse.max_width; > fsize->discrete.height = fse.max_height; > > - vpfe_dbg(1, vpfe, "%s: index: %d pixformat: %4.4s size: %dx%d\n", > - __func__, fsize->index, (char *)&fsize->pixel_format, > + vpfe_dbg(1, vpfe, "%s: index: %d pixformat: %4pE size: %dx%d\n", > + __func__, fsize->index, &fsize->pixel_format, > fsize->discrete.width, fsize->discrete.height); > > return 0; > @@ -2242,8 +2228,8 @@ vpfe_async_bound(struct v4l2_async_notifier *notifier, > continue; > vpfe->active_fmt[i] = fmt; > vpfe_dbg(3, vpfe, > - "matched fourcc: %4.4s code: %04x idx: %d\n", > - (char *)&fmt->fourcc, mbus_code.code, i); > + "matched fourcc: %4pE code: %04x idx: %d\n", > + &fmt->fourcc, mbus_code.code, i); > vpfe->num_active_fmt = ++i; > } > } >
